CN202043066U - Sensorless and brushless DC (direct current) motor controller - Google Patents
Sensorless and brushless DC (direct current) motor controller Download PDFInfo
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- CN202043066U CN202043066U CN2010206252855U CN201020625285U CN202043066U CN 202043066 U CN202043066 U CN 202043066U CN 2010206252855 U CN2010206252855 U CN 2010206252855U CN 201020625285 U CN201020625285 U CN 201020625285U CN 202043066 U CN202043066 U CN 202043066U
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- brushless
- motor
- chip microcomputer
- stitch
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Abstract
The utility model discloses a sensorless and brushless DC (direct current) motor controller. A singlechip detects the back electromotive force to determine the position of a rotor, then electrons are driven to rotate, and a position sensor is replaced by an electronic circuit; a zero crossing point of the back electromotive force generated by a motor in the operation process is detected to determine the position of the rotor to realize phase change; and the back electromotive force of a no-electricity winding is detected by a program, and the phase change time is obtained by calculation to control all phases of windings to be sequentially conducted, so that the phase change is realized to control the motor to stably rotate. The whole structure is simple, the volume is superminiature, the manufacturing cost is low, the cost is low, the operating performance is good, and the service life is long.
Description
Technical field
The utility model relates to a kind of DC motor controller, refers more particularly to a kind of can be used for rotating disk, toy car, miniature the controlling brshless DC motor and utilize implantation software to control the brushless DC motor without sensor controller of motor smooth rotation of model plane.
Background technology
Our motor of use mainly contains three kinds now: brush motor, position sensor brushless electric machine and no brush and no position sensing motor, use has the brush direct current machine to solve the commutation problem easily, but noise is big, and carbon brush wearing and tearing or damage easily, this can increase the maintenance, repair difficulty, increases use cost; Use has sensor brushless DC motor to determine rotor-position easily, solves the commutation problem, but has increased design, manufacturing and the installation difficulty of motor, has also increased cost, and transducer damages easily, causes shorten the useful life of motor.
The motor volume that uses in some application scenarios requirements is little, efficient is high, rotating speed is high, miniature permanent-magnet brushless DC electric machine can meet the demands preferably, because motor volume is less, installation site transducer difficulty, so miniature Brushless DC Motor without Position Sensor control just seems particularly necessary, the difficult point of Brushless DC Motor without Position Sensor control is the detection of rotor-position signal, the researcher has proposed all multi-methods both at home and abroad at present, wherein the back electromotive force method is the simplest, reliable, and range of application is the most extensive; Generally the controlling schemes of Cai Yonging is based on the control of DSP with based on control of application-specific integrated circuit (ASIC) etc., but its price height, volume are big, are unfavorable for being used in the micromachine controller.
Summary of the invention
In order to solve deficiency of the prior art, the utility model provides a kind of brushless DC motor without sensor controller, overall structure is simple, volume is extra small, cheap, runnability is good, picks up counting from detected outage mutually and waits for the back-emf zero crossing, the corresponding time is waited in time-delay again, realizes commutation.
The purpose of this utility model realizes by the following technical solutions:
Three output signal A of brushless electric machine, B, C is connected to the stitch P1 of single-chip microcomputer respectively by three identical signal processing circuits, P2, P3, single-chip microcomputer stitch P4 is connected with capacitor C 4, stitch P5, P6 is respectively the output signal A1 of output signal A after single-chip microcomputer detects, A2, stitch P13, P14 is respectively the output signal B1 of output signal B after single-chip microcomputer detects, B2, stitch P10, P12 is respectively the output signal C1 of output signal C after single-chip microcomputer detects, C2, stitch P11 is the common signal end, A1, A2, B1, B2, C1, C2 feeds back to brushless electric machine through output behind the amplifying circuit respectively.
The brushless DC motor without sensor controller detects back electromotive force by single-chip microcomputer and determines rotor-position, drives electronics then and rotates.
Brshless DC motor is determined rotor-position by Hall element, so that each phase winding sequential turn-on of stator realizes commutation, the utility model then is to utilize electronic circuit to replace position transducer, determine rotor-position by the back-emf zero crossing that the detection motor produces in running, realize commutation.
Back electromotive force by program detection no power winding calculates commutating period, controls the conducting successively of each phase winding, realizes commutation, control motor smooth rotation.
Band position transducer dc brushless motor is determined rotor-position by Hall element exactly, so that each phase winding sequential turn-on of stator realizes commutation; Utility model then is to utilize electronic circuit to replace position transducer, determines rotor-position by the back-emf zero crossing that the detection motor produces in running, realizes commutation.
The utility model utilizes single-chip microcomputer to detect back electromotive force to determine rotor-position, drive the controller of the brushless DC motor without position sensor of electronics rotation then, from the detected wait back-emf zero crossing that picks up counting that cuts off the power supply mutually, the corresponding time is waited in time-delay again, realizes commutation; Total is simple, the volume microminiature, and low cost of manufacture, cheap, runnability is good, and useful life is of a specified duration.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 2 is a software control procedure flow chart of the present utility model.
Embodiment
Below by drawings and Examples the utility model is further described and describes
The utility model is determined rotor-position by Hall element, so that each phase winding sequential turn-on of stator realizes commutation, not having transducer brush DC machine then is to utilize electronic circuit to replace position transducer, determine rotor-position by the back-emf zero crossing that the detection motor produces in running, realize commutation.
Back electromotive force by program detection no power winding calculates commutating period, controls the conducting successively of each phase winding, realizes commutation, control motor smooth rotation.
Band position transducer dc brushless motor is determined rotor-position by Hall element exactly, so that each phase winding sequential turn-on of stator realizes commutation; Utility model then is to utilize electronic circuit to replace position transducer, determines rotor-position by the back-emf zero crossing that the detection motor produces in running, realizes commutation.
Be that example further specifies with the star winding below: motor will be through 6 commutations in running, always there is a phase winding not switch on during each commutation, can detect the back-emf that winding produces this moment at this phase winding port, and back-emf is continuous in 60 ° of electrical degrees.Because rating of machine, manufacturing process is variant, the back-emf value difference that causes the same electrical angle, if determine rotor-position by the numerical value that detects back-emf, difficulty is very big, therefore must find the relation of this back-emf and rotor-position, could determine rotor-position, back-emf always once passes through coordinate transverse axis (zero crossing) in 60 ° electrical degree process, and electrical degree herein and next time the electrical degree of commutation point just in time differ 30 °, so can be by detection back-emf zero crossing, the 30 ° of commutations of delaying time again, this patent is to pick up counting from detected outage mutually to wait for the back-emf zero crossing, the corresponding time is waited in time-delay again, realizes commutation.
See Fig. 1, the brushless DC motor without sensor controller detects back electromotive force by single-chip microcomputer and determines rotor-position, drives electronics then and rotates.Three output signal A of brushless electric machine, B, C is connected to the stitch P1 of single-chip microcomputer respectively by three identical signal processing circuits, P2, P3, single-chip microcomputer stitch P4 is connected with capacitor C 4, stitch P5, P6 is respectively the output signal A1 of output signal A after single-chip microcomputer detects, A2, stitch P13, P14 is respectively the output signal B1 of output signal B after single-chip microcomputer detects, B2, stitch P10, P12 is respectively the output signal C1 of output signal C after single-chip microcomputer detects, C2, stitch P11 is the common signal end, A1, A2, B1, B2, C1, C2 feeds back to brushless electric machine through output behind the amplifying circuit respectively.
Single-chip microcomputer also is provided with detection signal port IOB1, IOB2, IOB3 simultaneously, and IOB1, IOB3 are connected with the IOB3 current foldback circuit, are connected with resistance R 39, R42 between IOB2, IOB3.
Further, described signal processing circuit, form by electric capacity, resistance and operational amplifier, after the electric capacity one end series resistance, insert the in-phase input end of operational amplifier behind resistance in parallel again and the electric capacity, the inverting input of operational amplifier is added with 5V voltage, and the inverting input mouth of operational amplifier is connected in parallel; With output signal a-signal treatment circuit is example, by capacitor C 2, C11, and resistance R 22, R23, R24, R30, and operational amplifier U4A forms, behind the C2 one end series connection R22, insert the in-phase input end of U4A behind R23 in parallel again, the C11, the inverting input of U4A is added with 5V voltage; The inverting input mouth of U4A, U4B, U4C is connected in parallel.
Further, described amplifying circuit, the stitch of single-chip microcomputer are attached to the base stage of triode respectively after the series resistance, and the collector electrode output of triode is connected to brushless electric machine; With output signal B1, B2 is that example is described, and stitch P13, the P14 of single-chip microcomputer is attached to the base stage of triode Q2, Q5 respectively behind series resistance R15, the R16, is connected a resistance R 11 between the emitter of Q2 and base stage, and the collector electrode of Q2, Q5 is exported and is connected to brushless electric machine.
Further, described current foldback circuit, by resistance R 14, R29, R33, R37, capacitor C 5, operational amplifier U4D forms, and IBO1 inserts the output of U4D, and the model of U4D is LM339.
Further, described single-chip microcomputer model is SOP14, has been implanted into programming software.
Referring to Fig. 2, utilize software to detect the program flow diagram of control brushless electric machine, carry out control corresponding by the binary code numerical value that detects IOB2 and IOB3, IOB2, IOB3 detect numerical value and the motor response situation sees the following form:
| IOB3 | IBO2 | Motor | Single-chip microprocessor MCU |
| 1 | 0 | Just change | Work |
| 0 | 1 | Counter-rotating | Work |
| 0 | 0 | Stop | Standby |
| 1 | 1 | Stop | Standby |
Claims (6)
1. brushless DC motor without sensor controller, it is characterized in that, three output signal A of brushless electric machine, B, C is connected to the stitch P1 of single-chip microcomputer respectively by three identical signal processing circuits, P2, P3, single-chip microcomputer stitch P4 is connected with capacitor C 4, stitch P5, P6 is respectively the output signal A1 of output signal A after single-chip microcomputer detects, A2, stitch P13, P14 is respectively the output signal B1 of output signal B after single-chip microcomputer detects, B2, stitch P10, P12 is respectively the output signal C1 of output signal C after single-chip microcomputer detects, C2, stitch P11 is the common signal end, A1, A2, B1, B2, C1, C2 feeds back to brushless electric machine through output behind the amplifying circuit respectively.
2. brushless DC motor without sensor controller according to claim 1; it is characterized in that; single-chip microcomputer also is provided with detection signal port IOB1, IOB2, IOB3, and IOB1, IOB3 are connected with the IOB3 current foldback circuit, is connected with resistance R 39, R42 between IOB2, IOB3.
3. brushless DC motor without sensor controller according to claim 1, it is characterized in that, described signal processing circuit, form by electric capacity, resistance and operational amplifier, after the electric capacity one end series resistance, insert the in-phase input end of operational amplifier behind resistance in parallel again and the electric capacity, the inverting input of operational amplifier is added with 5V voltage, and the inverting input mouth of operational amplifier is connected in parallel.
4. brushless DC motor without sensor controller according to claim 1 is characterized in that, described amplifying circuit, the stitch of single-chip microcomputer are attached to the base stage of triode respectively after the series resistance, and the collector electrode output of triode is connected to brushless electric machine.
5. brushless DC motor without sensor controller according to claim 2 is characterized in that, described current foldback circuit; by resistance R 14, R29, R33, R37, capacitor C 5, operational amplifier U4D forms; IBO1 inserts the output of U4D, and the model of U4D is LM339.
6. brushless DC motor without sensor controller according to claim 1 and 2 is characterized in that, described single-chip microcomputer model is SOP14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206252855U CN202043066U (en) | 2010-11-26 | 2010-11-26 | Sensorless and brushless DC (direct current) motor controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206252855U CN202043066U (en) | 2010-11-26 | 2010-11-26 | Sensorless and brushless DC (direct current) motor controller |
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| Publication Number | Publication Date |
|---|---|
| CN202043066U true CN202043066U (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206252855U Expired - Fee Related CN202043066U (en) | 2010-11-26 | 2010-11-26 | Sensorless and brushless DC (direct current) motor controller |
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| CN (1) | CN202043066U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107304651A (en) * | 2016-04-18 | 2017-10-31 | 南京宽维电子科技有限公司 | Window opener or door lifter travel control system and its control method |
| CN107370423A (en) * | 2017-07-27 | 2017-11-21 | 宁波大学 | The effective control method being mutated without torque in Hall brushless DC motor running |
| CN114123875A (en) * | 2020-08-27 | 2022-03-01 | 致新科技股份有限公司 | Motor controller |
| CN114257137A (en) * | 2020-09-24 | 2022-03-29 | 苏州福瑞思信息科技有限公司 | Control method and device of brushless direct current motor and motor system |
-
2010
- 2010-11-26 CN CN2010206252855U patent/CN202043066U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107304651A (en) * | 2016-04-18 | 2017-10-31 | 南京宽维电子科技有限公司 | Window opener or door lifter travel control system and its control method |
| CN107370423A (en) * | 2017-07-27 | 2017-11-21 | 宁波大学 | The effective control method being mutated without torque in Hall brushless DC motor running |
| CN107370423B (en) * | 2017-07-27 | 2019-08-02 | 宁波大学 | Effective control method that torque is mutated in no Hall brushless DC motor operational process |
| CN114123875A (en) * | 2020-08-27 | 2022-03-01 | 致新科技股份有限公司 | Motor controller |
| CN114123875B (en) * | 2020-08-27 | 2023-09-22 | 致新科技股份有限公司 | Motor controller |
| CN114257137A (en) * | 2020-09-24 | 2022-03-29 | 苏州福瑞思信息科技有限公司 | Control method and device of brushless direct current motor and motor system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111116 Termination date: 20131126 |