CN202334399U - Closed loop control circuit of soft starter - Google Patents
Closed loop control circuit of soft starter Download PDFInfo
- Publication number
- CN202334399U CN202334399U CN2011204615882U CN201120461588U CN202334399U CN 202334399 U CN202334399 U CN 202334399U CN 2011204615882 U CN2011204615882 U CN 2011204615882U CN 201120461588 U CN201120461588 U CN 201120461588U CN 202334399 U CN202334399 U CN 202334399U
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- circuit
- analog signal
- microcontroller
- voltage
- utility
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- Motor And Converter Starters (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The utility model discloses a closed loop control circuit of a soft starter, which comprises a three-phase voltage synchronization pulse signal circuit, a thyristor drive circuit, a protection circuit, a display circuit, a microcontroller, a voltage analog signal circuit, a current analog signal circuit, a memory and a resetting circuit, wherein the three-phase voltage synchronization pulse signal circuit, the thyristor drive circuit, the protection circuit and the display circuit are connected with one side of the microcontroller, and the voltage analog signal circuit, the current analog signal circuit, the memory and the resetting circuit are connected with the other side of the microcontroller. The closed loop control circuit of soft starter disclosed by the utility model has the advantages of effectively reducing the starting current of the motor and having good dynamic response property and robustness.
Description
Technical field
The utility model relates to a kind of control circuit, particularly a kind of soft starter closed control circuit.
Background technology
Generally speaking, the starting current of threephase asynchronous is bigger, and starting torque and little.Excessive starting current can make line voltage descend, and influences the normal operation of other power consumption equipments, even makes and himself can't start.At this moment just something must be done to reduces starting current, and way commonly used is a reduced voltage starting.And traditional reduced voltage starting method; Like star/angle starting, stator crosstalk resistance or reactor starting, autotransformer reduced voltage starting etc., they all are the one-level reduced voltage startings, and electric current has twice impact in the starting process; Though its amplitude is lower than across-the-line starting electric current; But the starting process time is longer, and all can't regulate continuously the starting voltage of motor, thereby still has bigger impulse current when causing electric motor starting.
The utility model content
The utility model technical problem to be solved provides a kind of soft starter closed control circuit, and the starting current that it has reduced motor effectively has good dynamic response performance and robustness.
For solveing the technical problem; The utility model provides a kind of soft starter closed control circuit; It is characterized in that; It comprises three-phase voltage synchronization pulse circuit, thyristor driving circuit, protective circuit, display circuit, microcontroller, voltage analog signal circuit, current analog signal circuit, memory, reset circuit; Three-phase voltage synchronization pulse circuit, thyristor driving circuit, protective circuit, display circuit, be connected with a side of microcontroller, voltage analog signal circuit, current analog signal circuit, memory, reset circuit are connected with the opposite side of microcontroller.
The positive progressive effect of the utility model is: the utility model carries out closed-loop control with the feedback quantity of motor power factor angle as system to power-factor angle, under the condition that guarantees big starting torque, has reduced the starting current of motor effectively.The utility model is through monitoring motor power factor angle; Revise the trigger angle of thyristor in real time by fuzzy control method; Avoided in motor starting process; Because the electromagnetic torque that the variation of motor port input voltage causes vibration and current oscillation, ensured that electric moter voltage regulates by the rule of expection.In addition, the acquisition of motor power factor angle information is for the operation of the light-load energy saving of motor provides reliable basis.The utility model simplicity of design, reliable, and have good dynamic response performance and robustness.
Description of drawings
Fig. 1 is the module frame chart of the utility model one embodiment.
Embodiment
Lift a preferred embodiment below, and combine accompanying drawing to come the clearer the utility model of intactly explaining.
As shown in Figure 1; The utility model soft starter closed control circuit comprises three-phase voltage synchronization pulse circuit, thyristor driving circuit, protective circuit, display circuit, microcontroller, voltage analog signal circuit, current analog signal circuit, memory, reset circuit; Three-phase voltage synchronization pulse circuit, thyristor driving circuit, protective circuit, display circuit, be connected with a side of microcontroller, voltage analog signal circuit, current analog signal circuit, memory, reset circuit are connected with the opposite side of microcontroller.
Behind three phase supply power source voltage signal process three-phase voltage synchronization pulse circuit, form the three-phase voltage synchronizing pulse train of six pulses of each voltage cycle (300hz), get into microcontroller, as the clock reference that triggers; Each phase voltage square wave reshaping signal of power supply gets into memory simultaneously, in order to carrying out the phase shortage of software, the usefulness of open phase protection.Voltage, electric current get into microcontroller through absolute value and filter circuit, can carry out signals sampling and processing to voltage, electric current.Current signal gets into microcontroller through absolute value and square wave shaping simultaneously, is used for detecting the discontinuous current angle, but to obtain power scale factor angle.Protective circuit compares with reference quantity after with electric current, voltage signal filtering, when electric current, blocking-up triggering passage when voltage magnitude is too high, and sends signal to external interrupt and carries out Interrupt Process.
The utility model carries out closed-loop control with the feedback quantity of motor power factor angle as system to power-factor angle, under the condition that guarantees big starting torque, has reduced the starting current of motor effectively.The utility model is through monitoring motor power factor angle; Revise the trigger angle of thyristor in real time by fuzzy control method; Avoided in motor starting process; Because the electromagnetic torque that the variation of motor port input voltage causes vibration and current oscillation, ensured that electric moter voltage regulates by the rule of expection.In addition, the acquisition of motor power factor angle information is for the operation of the light-load energy saving of motor provides reliable basis.The utility model simplicity of design, reliable, and have good dynamic response performance and robustness.
Though more than described the embodiment of the utility model; But those skilled in the art is to be understood that; These only illustrate, and under the prerequisite of principle that does not deviate from the utility model and essence, can make numerous variations or modification to these execution modes.Therefore, the protection range of the utility model is limited appended claims.
Claims (1)
1. soft starter closed control circuit; It is characterized in that; It comprises three-phase voltage synchronization pulse circuit, thyristor driving circuit, protective circuit, display circuit, microcontroller, voltage analog signal circuit, current analog signal circuit, memory, reset circuit; Three-phase voltage synchronization pulse circuit, thyristor driving circuit, protective circuit, display circuit, be connected with a side of microcontroller, voltage analog signal circuit, current analog signal circuit, memory, reset circuit are connected with the opposite side of microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204615882U CN202334399U (en) | 2011-11-18 | 2011-11-18 | Closed loop control circuit of soft starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204615882U CN202334399U (en) | 2011-11-18 | 2011-11-18 | Closed loop control circuit of soft starter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202334399U true CN202334399U (en) | 2012-07-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204615882U Expired - Fee Related CN202334399U (en) | 2011-11-18 | 2011-11-18 | Closed loop control circuit of soft starter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202334399U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106330003A (en) * | 2016-08-30 | 2017-01-11 | 上海交通大学 | Simple soft start system and method for light-load asynchronous motor in power frequency 380V power system |
-
2011
- 2011-11-18 CN CN2011204615882U patent/CN202334399U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106330003A (en) * | 2016-08-30 | 2017-01-11 | 上海交通大学 | Simple soft start system and method for light-load asynchronous motor in power frequency 380V power system |
| CN106330003B (en) * | 2016-08-30 | 2020-06-30 | 上海交通大学 | System and method for simple soft start of light-load asynchronous motor under power frequency 380V power system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Sadayuchu Automation Technology (Shanghai) Co., Ltd. Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Sadayuchu Automation Technology (Shanghai) Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20141118 |
|
| EXPY | Termination of patent right or utility model |