CN112072966B - Detection device and detection method of position sensor - Google Patents
Detection device and detection method of position sensor Download PDFInfo
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- CN112072966B CN112072966B CN202010975123.2A CN202010975123A CN112072966B CN 112072966 B CN112072966 B CN 112072966B CN 202010975123 A CN202010975123 A CN 202010975123A CN 112072966 B CN112072966 B CN 112072966B
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- 238000001514 detection method Methods 0.000 title claims abstract description 56
- 230000001360 synchronised effect Effects 0.000 claims abstract description 75
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 6
- 230000010355 oscillation Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- 230000007547 defect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2203/00—Indexing scheme relating to controlling arrangements characterised by the means for detecting the position of the rotor
- H02P2203/03—Determination of the rotor position, e.g. initial rotor position, during standstill or low speed operation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
Abstract
The invention relates to a detection device and a detection method of a position sensor, in particular to the technical field of detection matched with an EPS permanent magnet synchronous motor rotor. A detection circuit board arranged in the device body is provided with a micro control chip, a rotary transformer signal decoding circuit, a motor driving circuit, a power supply module, a lithium battery, an SD card and a Flash memory chip; the motor driving circuit connected with the micro-control chip is connected with a permanent magnet synchronous motor UVW three-phase line through a motor interface, the micro-control chip is connected with a rotary transformer signal decoding circuit, and the other end of the micro-control chip is connected with a Hall sensor interface; the invention uses the angle of the photoelectric encoder as the detection standard, combines the rotary transformer signal decoding circuit and the motor driving circuit, realizes the precision detection of the 2-pole to 14-pole PMSM motor position sensor through six steps, has small volume, light weight and portability, and solves the problems of the prior art that the motor rotor is dragged by external force to rotate, the precision is poor, the detection is complicated, the volume is large, the weight is heavy and the portability is not realized.
Description
Technical Field
The invention relates to a detection device and a detection method of a position sensor, in particular to the technical field of detection matched with an EPS permanent magnet synchronous motor rotor.
Background
The accuracy of a position sensor configured by a permanent magnet synchronous motor in an EPS system of an automobile can directly influence the operation of the motor, the installation deviation of the position sensor can cause zero deviation of position detection of a motor rotor, unexpected straight-axis current is caused, and the motor torque fluctuation is large, the heating is serious, the efficiency is reduced, and the working performance of the EPS system is seriously influenced. The position sensor of the permanent magnet synchronous motor rotor comprises a rotary transformer and a Hall sensor, and the existing detection equipment and mode corresponding to the position sensor have the defects that firstly, the detection equipment is heavy in weight and inconvenient to carry, secondly, the permanent magnet synchronous motor rotor is required to be pushed and pulled by external force to rotate during detection, the use is very inconvenient, and the detection precision is low. Therefore, there is a need to develop a detection device and a detection method for a position sensor, which are light in size, convenient to carry, simple in detection operation method, and high in detection accuracy.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a detection device and a detection method of a position sensor, wherein the detection design of a rotary transformer and a Hall sensor of the position sensor is aimed at, the device body is light in weight, small in size and portable, the angle of a photoelectric encoder is used as a detection standard of the device body, and the precision detection of the rotary transformer and the Hall sensor, which are the position sensors configured by a permanent magnet synchronous motor of a 2-pole-14-pole EPS system, is realized by combining a rotary transformer signal decoding module and a motor driving circuit, the wiring is simple, the operation is convenient, and the detection device is particularly suitable for detecting the position sensor of a rotor of an EPS permanent magnet synchronous motor.
The invention realizes the aim through the following technical scheme:
The detection device of the position sensor comprises a device body, wherein a rotary transformer interface, a Hall sensor interface, a motor interface, a photoelectric encoder interface, a USB interface and a power jack are arranged on the device body, and a display screen, an operation keyboard and a buzzer are arranged on a panel of the device body; the method is characterized in that: the device body is internally provided with a detection circuit board, and the detection circuit board is provided with a micro control chip, a rotary transformer signal decoding circuit, a motor driving circuit, a power module, a lithium battery, an SD card and a Flash memory chip;
The motor driving circuit comprises a voltage, current and temperature monitoring module, a control signal end of the micro-control chip is connected with the motor driving circuit, the motor driving circuit is connected with a motor interface, U, V, W three-phase wires of the permanent magnet synchronous motor are connected through the motor interface, and output ends of the voltage, current and temperature monitoring module of the motor driving circuit are respectively connected with the micro-control chip; the micro control chip is connected with the rotary transformer signal decoding circuit through an SPI interface, and the other control signal end of the micro control chip is connected with the Hall sensor interface; the motor driving circuit, the rotary transformer signal decoding circuit and the working voltage Vcc end of the Hall sensor interface are respectively connected with the power supply module through wires; the other two output ends of the power supply module are connected with the micro control chip, and the other two output ends of the power supply module are connected with the voltage monitoring module of the motor driving circuit to respectively provide working voltages for the micro control chip and the voltage monitoring module; the input end of the power supply module is connected with a lithium battery, and the lithium battery is connected with an external power supply through a power supply jack; the display screen and the operation keyboard are connected with the micro-control chip through wires;
the device body is adapted to detect the rotary transformer and the Hall sensor position sensor of the 2-pole to 14-pole EPS permanent magnet brushless motor;
the micro control chip comprises an external oscillation clock and a real-time clock;
the rotary transformer signal decoding circuit comprises a special rotary transformer decoding chip, and decodes the rotary transformer signal through the special rotary transformer decoding chip;
The operation keyboard is provided with 16 key buttons, and the operation of the rotary transformer signal decoding circuit, the Hall sensor interface and the motor driving circuit and the on and off of a power supply are respectively controlled through the corresponding key buttons;
the voltage monitoring module of the motor driving circuit prevents insufficient or unstable external voltage through the power jack and ensures the normal operation of the motor driving circuit;
the current monitoring module of the motor driving circuit prevents the output current of the motor driving circuit from being overlarge, and protects equipment and the permanent magnet synchronous motor from being damaged;
the temperature monitoring module of the motor driving circuit prevents the motor driving circuit from being too high in temperature and damaging equipment and the permanent magnet synchronous motor.
A detection method of a detection device of a position sensor is characterized in that: the method is realized through the following steps:
1) Positioning the outer circle of a positioning boss on the permanent magnet synchronous motor, mounting the device body on the permanent magnet synchronous motor, and simultaneously connecting the photoelectric encoder with a shaft of the permanent magnet synchronous motor;
2) According to the type of the permanent magnet synchronous motor sensor, connecting the line of the permanent magnet synchronous motor position sensor to a corresponding interface, namely connecting a rotary transformer with a rotary transformer interface, connecting a Hall sensor with a Hall sensor interface, and then connecting U, V, W three-phase lines of the permanent magnet synchronous motor to a motor interface;
3) After the wiring is confirmed to be correct, the lithium battery is controlled to be connected through an operation keyboard to supply power for the power supply module, the power supply module is used for respectively supplying power for the micro-control chip, the motor driving circuit, the voltage monitoring module, the rotary transformer signal decoding circuit and the Hall sensor interface, the micro-control chip is keyed to work through the operation keyboard, and whether the permanent magnet synchronous motor position sensor is a rotary transformer or a Hall sensor is selected;
4) The motor driving circuit is controlled to electrify the permanent magnet synchronous motor through the micro control chip of the device body, the magnetic pole position of the rotor is placed in a zero position, a rotor reference zero position is provided for the photoelectric encoder, and preparation is made for the subsequent driving of the permanent magnet synchronous motor; at the same time, checking zero position of rotary transformer;
5) After the step 4) is implemented, driving the permanent magnet synchronous motor by using a six-step driving method, simultaneously reading the angle from the photoelectric encoder, and calculating the pole pair numbers of the rotor of the permanent magnet synchronous motor and the rotary transformer through the micro control chip; after the rotor of the permanent magnet synchronous motor runs for 360 degrees, diagnosing whether the connection looseness phenomenon exists between the device body and the permanent magnet synchronous motor or not according to whether the position of the photoelectric encoder returns to zero, and if the connection looseness phenomenon exists, repeating the above processes until the connection between the device body and the permanent magnet synchronous motor is fastened and accurately connected;
6) And the photoelectric encoder is used as position feedback to drive the permanent magnet synchronous motor, a position control mode is adopted for fixing a point, the measurement angle of the rotary transformer or the Hall sensor is checked with the measurement signal of the photoelectric encoder, and finally the detection of the precision of the position sensor of the permanent magnet synchronous motor is realized.
Compared with the prior art, the invention has the beneficial effects that:
According to the detection device and the detection method of the position sensor, the angle signal of the photoelectric encoder is used as a standard angle, the resolver signal is decoded through the special resolver decoding chip of the resolver signal decoding circuit, and the obtained resolver angle measurement result is compared with the angle of the photoelectric encoder, so that the precision detection of the resolver or the Hall sensor is realized. A 4S high-rate lithium battery is adopted, so that 12V-16.8V normal working voltage is provided for the device body; and the detection of the permanent magnet synchronous motor to different positions is realized through a motor driving circuit. The device body has the characteristics of small volume, light weight, self-driving, convenient carrying and strong applicability, and is particularly suitable for detecting the position sensor of the EPS permanent magnet synchronous motor rotor. The problems that the existing detection device is required to drag the rotor of the permanent magnet synchronous motor to rotate by external force during use, the precision is poor, the detection process is complex, the size is large, the weight is heavy, and the carrying is inconvenient are well solved.
Drawings
FIG. 1 is a schematic block diagram of the working principle of the present invention;
FIG. 2 is a schematic diagram of a resolver signal decoding circuit according to the present invention;
FIG. 3 is a schematic diagram of a motor driving circuit according to the present invention;
FIG. 4 is a circuit diagram of a voltage monitoring module of the motor drive circuit;
FIG. 5 is a circuit diagram of a current monitoring module of the motor drive circuit;
FIG. 6 is a circuit diagram of a temperature monitoring module of the motor drive circuit;
FIG. 7 is a circuit diagram of a power module of the present invention;
FIG. 8 is a circuit diagram of an operating keyboard of the present invention;
FIG. 9 is a schematic diagram of an SD card according to the present invention;
Fig. 10 is a circuit diagram of a Flash memory chip of the present invention.
Detailed Description
Embodiments of the present invention are described in further detail below (see fig. 1-10) with reference to the accompanying drawings:
(see figure 1) a detection device of a position sensor and a detection method thereof, wherein the detection device of the position sensor comprises a device body, a rotary transformer interface, a Hall sensor interface, a motor interface and a photoelectric encoder interface are arranged on the right side surface of the device body, a USB interface is arranged on the left side surface of the device body, a power supply jack is arranged on the front panel of the device body, a display screen and an operation keyboard are arranged on the panel of the device body, and a buzzer is arranged on the rear panel of the device body; the device is internally provided with a detection circuit board, and a micro control chip is arranged on the detection circuit board: model STM32F407ZEIT, resolver signal decoding circuit: model ADS1210, motor drive circuit, power module: converting and outputting 3.3V, 5V and 12-16.8V voltages; lithium battery: the lithium battery with 4S high multiplying power is charged by an external power supply through a power jack; the SD card and the Flash memory chip are used for storing data;
The motor driving circuit comprises a voltage monitoring module, a current monitoring module and a temperature monitoring module, the motor driving circuit is connected with a motor interface, a U, V, W three-phase line of the permanent magnet synchronous motor is connected to the motor interface, and the voltage, the current and the output end of the temperature monitoring module of the motor driving circuit are respectively connected with the micro-control chip; the voltage monitoring module is used for monitoring the voltage of the lithium battery, providing a monitoring voltage signal for the micro-control chip, controlling the motor driving circuit to work normally and giving an alarm by the buzzer; the current monitoring module feeds back a current signal to the micro control chip, so that the motor driving circuit operates stably; the temperature monitoring module provides a temperature signal for the micro-control chip to prevent the equipment and the permanent magnet synchronous motor from being damaged due to overhigh temperature.
The micro control chip is connected with the rotary transformer signal decoding circuit through an SPI interface, and the other control signal end of the micro control chip is connected with the Hall sensor interface to output a corresponding control signal;
The motor driving circuit, the rotary transformer signal decoding circuit and the working voltage Vcc end of the Hall sensor interface are respectively connected with the power supply module through wires; the other two output ends of the power supply module are connected with the micro control chip to provide 3.3V working voltage for the micro control chip, and the other two output ends of the power supply module are connected with the voltage monitoring module to provide 3.3V working voltage for the micro control chip; the input end of the power supply module is connected with a lithium battery, the lithium battery is connected with an external power supply through a power jack, and the lithium battery is charged through the external power supply; the display and the operation keyboard are connected with the micro-control chip through wires; lithium batteries provide voltages in the range of 12-16.8V.
The device body is adapted to detect a position sensor configured by the 2-pole to 14-pole EPS permanent magnet brushless motor: a resolver or a hall sensor.
The micro control chip comprises an external oscillation clock and a real-time clock.
(See fig. 2) the resolver signal decoding circuitry decodes the resolver signal via a dedicated resolver decoding chip. The model of the special rotary decoding chip is AD2S1210.
(See fig. 3) the motor drive circuit comprises a voltage monitoring module, a current monitoring module and a temperature monitoring module.
(See fig. 4), the voltage monitoring module of the motor driving circuit prevents insufficient or unstable external voltage through the power jack and ensures the normal operation of the motor driving circuit.
(See fig. 5), the current monitoring module of the motor driving circuit prevents the motor driving circuit from outputting excessive current, and protects the equipment and the permanent magnet synchronous motor from being damaged.
(See fig. 6) the temperature monitoring module of the motor drive circuit prevents the motor drive circuit from being too hot, damaging the equipment and the permanent magnet synchronous motor.
(See fig. 7) the power module comprises two conversion chips with the model numbers of LM2940CS-5.0 and LM3940IS-3.3, and converts the 12-16.8V voltage of the lithium battery into 3.3V and 5V working voltage output.
The operation keyboard has 16 key buttons, and the operation of the resolver signal decoding circuit, the Hall sensor interface, the motor driving circuit and the on and off of the power supply are controlled by the 16 key buttons respectively (see fig. 8).
A detection method of a detection device of a position sensor is characterized in that: the method is realized through the following steps:
1) Positioning the outer circle of a positioning boss on the permanent magnet synchronous motor, mounting the device body on the permanent magnet synchronous motor, and simultaneously connecting the photoelectric encoder with a shaft of the permanent magnet synchronous motor;
2) According to the type of the permanent magnet synchronous motor sensor, connecting the line of the permanent magnet synchronous motor position sensor to a corresponding interface, namely connecting a rotary transformer with a rotary transformer interface, connecting a Hall sensor with a Hall sensor interface, and then connecting U, V, W three-phase lines of the permanent magnet synchronous motor to a motor interface;
3) After the wiring is confirmed to be correct, the lithium battery is controlled to be connected through an operation keyboard to supply power for the power supply module, the power supply module is used for respectively supplying power for the micro-control chip, the motor driving circuit, the voltage monitoring module, the rotary transformer signal decoding circuit and the Hall sensor interface, the micro-control chip is keyed to work through the operation keyboard, and whether the permanent magnet synchronous motor position sensor is a rotary transformer or a Hall sensor is selected;
4) The motor driving circuit is controlled to electrify the permanent magnet synchronous motor through the micro control chip of the device body, the magnetic pole position of the rotor is placed in a zero position, a rotor reference zero position is provided for the photoelectric encoder, and preparation is made for the subsequent driving of the permanent magnet synchronous motor; at the same time, checking zero position of rotary transformer;
5) After the step 4) is implemented, driving the permanent magnet synchronous motor by using a six-step driving method, simultaneously reading the angle from the photoelectric encoder, and calculating the pole pair numbers of the rotor of the permanent magnet synchronous motor and the rotary transformer through the micro control chip; after the rotor of the permanent magnet synchronous motor runs for 360 degrees, diagnosing whether the connection looseness phenomenon exists between the device body and the permanent magnet synchronous motor or not according to whether the position of the photoelectric encoder returns to zero, and if the connection looseness phenomenon exists, repeating the above processes until the connection between the device body and the permanent magnet synchronous motor is fastened and accurately connected; six-step driving method, wherein each step of the rotor of the permanent magnet synchronous motor is spaced by 60 degrees;
6) The photoelectric encoder is used as position feedback, the motor driving circuit is used for driving the permanent magnet synchronous motor rotor to rotate, a position control mode is adopted for fixing points, the measuring angle of the rotary transformer or the Hall sensor is checked with the measuring signal of the photoelectric encoder, and finally the precision of the permanent magnet synchronous motor position sensor is detected. And the precision detection of the rotary transformer or the Hall sensor by any interval angle is realized by adopting a position control mode fixed point.
The following are the functions and options of the main constituent devices of the present invention:
The EPS permanent magnet brushless synchronous motor takes 6 poles, 8 poles and 10 poles as the most, the precision requirement of the rotary transformer is that the electrical angle error is not more than 1.5 degrees, and the physical angle error is not more than 0.21 degrees to meet the requirement, so that the invention adopts the angle of the photoelectric encoder with the electrical angle error not more than 0.02 degrees as the standard, and selects the photoelectric encoder with 5000 lines/rotation.
The photoelectric encoder is used as a detection standard and also used as a position sensor of the permanent magnet synchronous motor to provide a rotor position signal, so that the device body carries out accurate vector control on the permanent magnet synchronous motor, and the position sensor of the rotor of the permanent magnet synchronous motor is detected at each angular position to be detected in a position control mode.
Circuit configuration and function of resolver signal decoding circuit: the special rotary transformer decoding chip AD2S1210 is adopted for decoding the rotary transformer, and angle digital signals obtained after decoding are transmitted to the micro control chip MCU through the SPI interface.
Hall sensor interface circuit: the hall sensor is called a switch hall position sensor;
PMSM motors for EPS systems equipped with hall sensors generally comprise 5 signals: hall_ U, HALL _ V, HALL _w and hall_ A, HALL _b, wherein hall_ U, HALL _ V, HALL _w is used to detect PMSM motor rotor pole position and hall_ A, HALL _b is two orthogonal HALL encoder signals for improving rotor position measurement resolution.
The Hall encoder is connected with an IO port of the micro-control chip MCU through a Hall sensor interface. Because the resolution of the Hall sensor is low and the rotating speed is not high during testing, the requirements can be met by adopting a general IO port.
(See fig. 9 and 10), SD card and Flash memory chip: the data storage is realized through an SD card and a Flash memory chip, and the SD card and the Flash memory chip are connected with a micro control chip MCU through SPI interfaces.
Human-machine interface: the device consists of an operation keyboard, an LCD display screen and a USB interface. The operation keyboard is used for inputting instructions, the LCD display screen displays information, and the USB interface is used for being connected with the upper PC.
The above description is merely a preferred embodiment of the present invention, and the above illustration is not to be construed as limiting the spirit of the present invention in any way, and any simple modification or variation of the above embodiments according to the technical spirit of the present invention, and equivalent embodiments that may be changed or modified to equivalent variations using the above disclosed technical spirit of the present invention, will still fall within the scope of the technical solutions of the present invention, without departing from the spirit and scope of the present invention.
Claims (2)
1. The detection device of the position sensor comprises a device body, wherein a rotary transformer interface, a Hall sensor interface, a motor interface, a photoelectric encoder interface, a USB interface and a power jack are arranged on the device body, and a display screen, an operation keyboard and a buzzer are arranged on a panel of the device body; the method is characterized in that: the device body is internally provided with a detection circuit board, and the detection circuit board is provided with a micro control chip, a rotary transformer signal decoding circuit, a motor driving circuit, a power module, a lithium battery, an SD card and a Flash memory chip;
The motor driving circuit comprises a voltage, current and temperature monitoring module, a control signal end of the micro-control chip is connected with the motor driving circuit, the motor driving circuit is connected with a motor interface, U, V, W three-phase wires of the permanent magnet synchronous motor are connected through the motor interface, and output ends of the voltage, current and temperature monitoring module of the motor driving circuit are respectively connected with the micro-control chip; the micro control chip is connected with the rotary transformer signal decoding circuit through an SPI interface, and the other control signal end of the micro control chip is connected with the Hall sensor interface; the motor driving circuit, the rotary transformer signal decoding circuit and the working voltage Vcc end of the Hall sensor interface are respectively connected with the power supply module through wires; the other two output ends of the power supply module are connected with the micro control chip, and the other two output ends of the power supply module are connected with the voltage monitoring module of the motor driving circuit to respectively provide working voltages for the micro control chip and the voltage monitoring module; the input end of the power supply module is connected with a lithium battery, and the lithium battery is connected with an external power supply through a power supply jack; the display screen and the operation keyboard are connected with the micro-control chip through wires;
The device body is adapted to detect the rotary transformer and the Hall sensor position sensor of the 2-pole to 14-pole EPS permanent magnet synchronous motor; the micro control chip comprises an external oscillation clock and a real-time clock; the rotary transformer signal decoding circuit comprises a special rotary transformer decoding chip, and decodes the rotary transformer signal through the special rotary transformer decoding chip; the operation keyboard is provided with 16 key buttons, and the operation of the rotary transformer signal decoding circuit, the Hall sensor interface and the motor driving circuit and the on and off of a power supply are respectively controlled through the corresponding key buttons; the voltage monitoring module of the motor driving circuit prevents insufficient or unstable external voltage through the power jack and ensures the normal operation of the motor driving circuit; the current monitoring module of the motor driving circuit prevents the output current of the motor driving circuit from being overlarge, and protects equipment and the permanent magnet synchronous motor from being damaged; the temperature monitoring module of the motor driving circuit prevents the motor driving circuit from being too high in temperature and damaging equipment and the permanent magnet synchronous motor.
2. A detection method of a detection device of a position sensor is characterized in that: the method is realized through the following steps:
1) Positioning the outer circle of a positioning boss on the permanent magnet synchronous motor, mounting the device body on the permanent magnet synchronous motor, and simultaneously connecting the photoelectric encoder with a shaft of the permanent magnet synchronous motor;
2) According to the type of the permanent magnet synchronous motor sensor, connecting the line of the permanent magnet synchronous motor position sensor to a corresponding interface, namely connecting a rotary transformer with a rotary transformer interface, connecting a Hall sensor with a Hall sensor interface, and then connecting U, V, W three-phase lines of the permanent magnet synchronous motor to a motor interface;
3) After the wiring is confirmed to be correct, the lithium battery is controlled to be connected through an operation keyboard to supply power for the power supply module, the power supply module is used for respectively supplying power for the micro-control chip, the motor driving circuit, the voltage monitoring module, the rotary transformer signal decoding circuit and the Hall sensor interface, the micro-control chip is keyed to work through the operation keyboard, and whether the permanent magnet synchronous motor position sensor is a rotary transformer or a Hall sensor is selected;
4) The motor driving circuit is controlled to electrify the permanent magnet synchronous motor through the micro control chip of the device body, the magnetic pole position of the rotor is placed in a zero position, a rotor reference zero position is provided for the photoelectric encoder, and preparation is made for the subsequent driving of the permanent magnet synchronous motor; at the same time, checking zero position of rotary transformer;
5) After the step 4) is implemented, driving the permanent magnet synchronous motor by using a six-step driving method, simultaneously reading the angle from the photoelectric encoder, and calculating the pole pair numbers of the rotor of the permanent magnet synchronous motor and the rotary transformer through the micro control chip; after the rotor of the permanent magnet synchronous motor runs for 360 degrees, diagnosing whether the connection looseness phenomenon exists between the device body and the permanent magnet synchronous motor or not according to whether the position of the photoelectric encoder returns to zero, and if the connection looseness phenomenon exists, repeating the above processes until the connection between the device body and the permanent magnet synchronous motor is fastened and accurately connected;
6) And the photoelectric encoder is used as position feedback to drive the permanent magnet synchronous motor, a position control mode is adopted for fixing a point, the measurement angle of the rotary transformer or the Hall sensor is checked with the measurement signal of the photoelectric encoder, and finally the detection of the precision of the position sensor of the permanent magnet synchronous motor is realized.
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| CN202010975123.2A CN112072966B (en) | 2020-09-16 | 2020-09-16 | Detection device and detection method of position sensor |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207573266U (en) * | 2017-11-07 | 2018-07-03 | 上海大郡动力控制技术有限公司 | For the detecting system of permanent-magnet synchronous motor rotor position |
| CN108400732A (en) * | 2018-03-16 | 2018-08-14 | 西北工业大学 | A kind of DC brushless motor or AC permanent magnet synchronous motor detecting apparatus for rotor position |
| CN212258822U (en) * | 2020-09-16 | 2020-12-29 | 荆州恒隆汽车技术(检测)中心 | Detection device of position sensor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207573266U (en) * | 2017-11-07 | 2018-07-03 | 上海大郡动力控制技术有限公司 | For the detecting system of permanent-magnet synchronous motor rotor position |
| CN108400732A (en) * | 2018-03-16 | 2018-08-14 | 西北工业大学 | A kind of DC brushless motor or AC permanent magnet synchronous motor detecting apparatus for rotor position |
| CN212258822U (en) * | 2020-09-16 | 2020-12-29 | 荆州恒隆汽车技术(检测)中心 | Detection device of position sensor |
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