CN104779854A - Upwind drag control method for outdoor fan - Google Patents
Upwind drag control method for outdoor fan Download PDFInfo
- Publication number
- CN104779854A CN104779854A CN201510121816.4A CN201510121816A CN104779854A CN 104779854 A CN104779854 A CN 104779854A CN 201510121816 A CN201510121816 A CN 201510121816A CN 104779854 A CN104779854 A CN 104779854A
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- China
- Prior art keywords
- motor
- outdoor fan
- current
- rotating speed
- control
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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
- H02P6/20—Arrangements for starting
- H02P6/22—Arrangements for starting in a selected direction of rotation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention relates to an outdoor fan, and provides a method for detecting and controlling positive/negative rotation of the outdoor fan during upwind running aimed at a problem of no public method for detecting positive/negative rotation of a motor in the prior art. The method comprises the following steps: firstly, obtaining a phase voltage value of three-phase counter electromotive force by a system; secondly, according to change of the phase voltage value of the three-phase counter electromotive force, obtaining a zero-crossing time sequence of the phase voltage of the three-phase counter electromotive force by the system; finally, according to a time sequence change mode of the phase voltage value of the three-phase counter electromotive force, judging positive/negative rotation of the motor. Through the method for detecting and controlling positive/negative rotation of the outdoor fan during upwind running, information whether the motor is in a positive or negative rotation state can be correctly obtained; the method is used for detecting a running condition of the outdoor fan after the outdoor fan receives a startup command; according to the running condition of the outdoor fan, a single-chip microcomputer judges whether the outdoor fan needs to be started after being controlled to be in a positive rotation state or not, so that upwind running control of the outdoor fan is realized. The method is suitable for testing the outdoor fan.
Description
Technical field
The present invention relates to outdoor fan, particularly the control method of outdoor fan.
Background technology
Permanent-magnet synchronous DC brushless motor, its back electromotive force is sine wave shape, when adopting permanent-magnet synchronous DC brushless motor as outdoor fan of air-conditioner driver part, due to reasons such as sea winds, before activation, outdoor fan motor may be in positive direction or counter-rotation to air-conditioning, and controller needs to detect the position of motor, rotating speed and its rotation direction, in good time starts control accordingly according to the working order of motor, reaches correct and controls the objects such as the operation of motor.
Current technology, as patent " control method that outdoor fan of air-conditioner drives, control device and there is its air-conditioning (201410183282.3) ", be in the condition of antiport before electric motor starting under, openly outdoor fan does not drag control method against the wind, and the contrary wind that cannot realize blower fan drags and controls.
Summary of the invention
Technical problem to be solved by this invention, is just to provide a kind of outdoor fan and drags control method against the wind, drags control against the wind to realize blower fan.
The present invention solve the technical problem, the technical scheme adopted is, outdoor fan drags control method against the wind, comprise systems axiol-ogy to direction of motor rotation when detecting that motor rotates backward, systems axiol-ogy current motor rotating speed, and control motor rotations from current reversion operating frequency to shutting down, then from shutting down motor speed is adjusted to target start rotating speed.
Concrete, system by detecting motor three phase back-emf U/V/W to the phase voltage numerical value between its central point N, and obtains current rotating speed according to phase voltage.
Concrete, when systems axiol-ogy is less than zero to current rotating speed, motor speed from current reversion operating frequency to shutting down, then is adjusted to target start rotating speed from shutting down by Systematical control motor rotations, otherwise Systematical control motor normally starts.
Concrete, system controls motor rotations from current reversion operating frequency to shutting down by dragging control electric current is increased to target drawing current I from 0.
Further, system is by controlling to drag angle from the first angle γ to 0 change, then control d axle drawing current is from the reverse drag target electric current I change of the most Zhongdao of 0 to Icos γ, control q axle drawing current changes to the most Zhongdao 0 of Isin γ from 0 simultaneously, controls motor rotations from current rotating speed to shutting down;
Wherein, system obtains motor current location by phase voltage, then obtains the first angle γ according to motor current location.
Further, system drags angle γ by controlling to drag angle from 0 to the second
2change, control d axle drawing current is γ from I to Icos
2change, control q axle drawing current is from 0 to Isin γ simultaneously
2change, controls motor from stopping to target start rotating speed;
Wherein, system calculates motor target location according to target start rotating speed, and draws the second dragging angle γ according to motor target location
2.
The invention has the beneficial effects as follows: by systems axiol-ogy to direction of motor rotation when detecting that motor rotates backward, systems axiol-ogy current motor rotating speed, and control motor rotations from current reversion operating frequency to shutting down, from shutting down motor speed is adjusted to target start rotating speed again, concrete controls motor rotations from current reversion operating frequency to shutting down by dragging control electric current is increased to target drawing current I from 0, thus reach and control motor and operate from antiport to forward, realize outdoor fan and against the wind start control.
Accompanying drawing explanation
Fig. 1 is that outdoor fan of the present invention drags the d/q coordinate system of control method embodiment and the rotation alpha β coordinate system variable schematic diagram with rotor running against the wind;
Fig. 2 is that the contrary wind of outdoor fan of the present invention contrary wind dragging control method embodiment oppositely drags to forward dragging schematic diagram.
Embodiment
Technical scheme of the present invention is described in detail below in conjunction with drawings and Examples:
To the present invention is directed in prior art openly outdoor fan drag control method against the wind, the contrary wind that cannot realize blower fan drags the problem controlled, a kind of outdoor fan is provided to drag control method against the wind, comprise systems axiol-ogy to direction of motor rotation when detecting that motor rotates backward, systems axiol-ogy current motor rotating speed, and control motor rotations from current reversion operating frequency to shutting down, then from shutting down motor speed is adjusted to target start rotating speed.By systems axiol-ogy to direction of motor rotation when detecting that motor rotates backward, systems axiol-ogy current motor rotating speed, and control motor rotations from current reversion operating frequency to shutting down, from shutting down motor speed is adjusted to target start rotating speed again, concrete controls motor rotations from current reversion operating frequency to shutting down by dragging control electric current is increased to target drawing current I from 0, thus reach and control motor and operate from antiport to forward, realize outdoor fan and against the wind start control.
Embodiment
Outdoor fan in this example drags control method against the wind, specifically as shown in Figures 1 and 2, comprises the following steps:
A.MCU obtains three phase back-emf U/V/W to the phase voltage numerical value between its central point N;
B.MCU obtains motor speed f according to the phase voltage numerical value of three phase back-emf U/V/W
rand position θ;
C.MCU experiences a low pass filter, controls drawing current from 0 to reverse drag target electric current I change;
D, simultaneously, MCU experience first drags the time, control to drag angle from the first angle γ to 0 change, control d axle drawing current is from the reverse drag target electric current I change of the most Zhongdao of 0 to Icos γ, control q axle drawing current changes to the most Zhongdao 0 of Isin γ from 0 simultaneously, controls motor rotations from the first reversion operating frequency f
rto shutting down.Wherein, system obtains motor current location by phase voltage, then obtains the first angle γ according to motor current location.
E, subsequently, by motor rotations from shutting down, MCU experience second drags the time, controls to drag angle and drags angle γ from 0 to the second
2change, control d axle drawing current is from I
1to I
1cos γ
2change, control q axle drawing current is from 0 to I simultaneously
1sin γ
2change, controls motor from stopping to the second operating frequency, wherein I
1for forward drag target electric current, equal with reverse drag target electric current I.Wherein, system calculates motor target location according to target start rotating speed, and draws the second dragging angle γ according to motor target location
2.
F, MCU experience the 3rd transition time, are switched to position Sensorless Control, and the contrary wind realizing motor starts control.
In sum, the present invention by systems axiol-ogy to direction of motor rotation when detecting that motor rotates backward, systems axiol-ogy current motor rotating speed, and control motor rotations from current reversion operating frequency to shutting down, from shutting down motor speed is adjusted to target start rotating speed again, concrete controls motor rotations from current reversion operating frequency to shutting down by dragging control electric current is increased to target drawing current I from 0, thus reach and control motor and operate from antiport to forward, realize outdoor fan and against the wind start control.
Claims (7)
1. outdoor fan drags control method against the wind, it is characterized in that, comprise systems axiol-ogy to direction of motor rotation when detecting that motor rotates backward, systems axiol-ogy current motor rotating speed, and control motor rotations from current reversion operating frequency to shutting down, then from shutting down motor speed is adjusted to target start rotating speed.
2. outdoor fan according to claim 1 drags control method against the wind, it is characterized in that, system by detecting motor three phase back-emf U/V/W to the phase voltage numerical value between its central point N, and obtains current rotating speed according to phase voltage.
3. outdoor fan according to claim 1 drags control method against the wind, it is characterized in that, when systems axiol-ogy is less than zero to current rotating speed, Systematical control motor rotations is from current reversion operating frequency to shutting down, from shutting down motor speed is adjusted to target start rotating speed again, otherwise Systematical control motor normally starts.
4. outdoor fan according to claim 1 drags control method against the wind, and it is characterized in that, system controls motor rotations from current reversion operating frequency to shutting down by drawing current is increased to reverse drag target electric current I from 0.
5. outdoor fan according to claim 1 drags control method against the wind, it is characterized in that, system, by low pass filter, controls drawing current from 0 to reverse drag target electric current I change.
6. outdoor fan according to claim 5 drags control method against the wind, it is characterized in that, system is by controlling to drag angle from the first angle γ to 0 change, then control d axle drawing current is from the reverse drag target electric current I change of the most Zhongdao of 0 to Icos γ, control q axle drawing current changes to the most Zhongdao 0 of Isin γ from 0 simultaneously, controls motor rotations from current rotating speed to shutting down;
Wherein, system obtains motor current location by phase voltage, then obtains the first angle γ according to motor current location.
7. outdoor fan according to claim 6 drags control method against the wind, it is characterized in that, system drags angle γ by controlling to drag angle from 0 to the second
2change, control d axle drawing current is γ from I to Icos
2change, control q axle drawing current is from 0 to Isin γ simultaneously
2change, controls motor from stopping to target start rotating speed;
Wherein, system calculates motor target location according to target start rotating speed, and draws the second dragging angle γ according to motor target location
2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510121816.4A CN104779854B (en) | 2015-03-19 | 2015-03-19 | Outdoor fan drags control method against the wind |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510121816.4A CN104779854B (en) | 2015-03-19 | 2015-03-19 | Outdoor fan drags control method against the wind |
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| Publication Number | Publication Date |
|---|---|
| CN104779854A true CN104779854A (en) | 2015-07-15 |
| CN104779854B CN104779854B (en) | 2018-04-10 |
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| CN201510121816.4A Active CN104779854B (en) | 2015-03-19 | 2015-03-19 | Outdoor fan drags control method against the wind |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071704A (en) * | 2015-07-20 | 2015-11-18 | 广东威灵电机制造有限公司 | Start control method and device for outdoor blower fan of air conditioner |
| CN106440255A (en) * | 2016-11-11 | 2017-02-22 | 广东美的暖通设备有限公司 | Fan control method, fan control system, fan and air conditioner |
| CN107702294A (en) * | 2017-11-03 | 2018-02-16 | 珠海格力电器股份有限公司 | Upwind starting control method and circuit of external fan of variable frequency air conditioner and air conditioner thereof |
| CN108105139A (en) * | 2017-12-19 | 2018-06-01 | 海信（山东）空调有限公司 | Permanent magnet synchronous direct flow fan starts control method, device and air-conditioner outdoor unit |
| CN109268299A (en) * | 2018-08-17 | 2019-01-25 | 珠海格力电器股份有限公司 | Fan steering detection device and method and fan |
| CN109708265A (en) * | 2018-12-20 | 2019-05-03 | 海信（山东）空调有限公司 | The starting method and outdoor unit of blower in a kind of outdoor unit |
| CN112098834A (en) * | 2020-06-06 | 2020-12-18 | 浙江永源机电制造有限公司 | Heat dissipation mechanism for air compressor and control method of heat dissipation mechanism |
| CN116557330A (en) * | 2023-07-11 | 2023-08-08 | 深圳盈特创智能科技有限公司 | Control management system for starting unbiased air duct |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071704A (en) * | 2015-07-20 | 2015-11-18 | 广东威灵电机制造有限公司 | Start control method and device for outdoor blower fan of air conditioner |
| CN106440255A (en) * | 2016-11-11 | 2017-02-22 | 广东美的暖通设备有限公司 | Fan control method, fan control system, fan and air conditioner |
| CN107702294A (en) * | 2017-11-03 | 2018-02-16 | 珠海格力电器股份有限公司 | Upwind starting control method and circuit of external fan of variable frequency air conditioner and air conditioner thereof |
| CN108105139A (en) * | 2017-12-19 | 2018-06-01 | 海信（山东）空调有限公司 | Permanent magnet synchronous direct flow fan starts control method, device and air-conditioner outdoor unit |
| CN108105139B (en) * | 2017-12-19 | 2019-06-14 | 海信（山东）空调有限公司 | Permanent magnet synchronous direct flow fan starts control method, device and air-conditioner outdoor unit |
| CN109268299A (en) * | 2018-08-17 | 2019-01-25 | 珠海格力电器股份有限公司 | Fan steering detection device and method and fan |
| CN109268299B (en) * | 2018-08-17 | 2023-11-03 | 珠海格力电器股份有限公司 | Fan steering detection device, detection method and fan |
| CN109708265A (en) * | 2018-12-20 | 2019-05-03 | 海信（山东）空调有限公司 | The starting method and outdoor unit of blower in a kind of outdoor unit |
| CN112098834A (en) * | 2020-06-06 | 2020-12-18 | 浙江永源机电制造有限公司 | Heat dissipation mechanism for air compressor and control method of heat dissipation mechanism |
| CN116557330A (en) * | 2023-07-11 | 2023-08-08 | 深圳盈特创智能科技有限公司 | Control management system for starting unbiased air duct |
| CN116557330B (en) * | 2023-07-11 | 2023-09-22 | 深圳盈特创智能科技有限公司 | Control management system for starting unbiased air duct |
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