CN204794778U - PMSM initial position detection device based on rotor fine motion - Google Patents
PMSM initial position detection device based on rotor fine motion Download PDFInfo
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- CN204794778U CN204794778U CN201520180908.5U CN201520180908U CN204794778U CN 204794778 U CN204794778 U CN 204794778U CN 201520180908 U CN201520180908 U CN 201520180908U CN 204794778 U CN204794778 U CN 204794778U
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- controller
- phase inverter
- current sensor
- initial position
- rotor
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- Control Of Ac Motors In General (AREA)
Abstract
The utility model relates to a PMSM initial position detection device based on rotor fine motion, including DC power supply, three -phase inverter, PMSM, host computer, controller, LCD screen and current sensor. Host computer and controller link to each other, DC power supply and three -phase inverter link to each other, three -phase inverter links to each other with PMSM through current sensor, the current sensor output links to each other with the controller, the controller output end links to each other with LCD screen, three -phase inverter. The three phase voltage of copy control ware control three -phase inverter output low frequency makes PMSM take place the fine motion, PMSM stator side A, B looks current feedback to controller that current sensor obtained the detection, and the controller shows rotor initial position estimate on the LCD screen. The device simple structure, it is high to detect the precision, does not rely on the motor structure, all is suitable for under motor empty load or load conditions.
Description
Technical field
The utility model relates to a kind of checkout gear of original position of electric motor's rotator, is specifically related to a kind of permanent-magnetic synchronous motor rotor initial position detection device based on rotor fine motion.
Background technology
Permagnetic synchronous motor has the advantages such as high efficiency, high torque ratio of inertias, high-energy-density, is obtaining a wide range of applications in recent years.In high-performance permanent magnet synchronous motor control system, need the accurate location knowing rotor.
Current initial position of rotor checkout gear, adopts voltage vector impulses injection method or High Frequency Injection usually.Voltage vector impulses injection method accuracy of detection is lower, and testing result is subject to the impact of electric machine structure.High Frequency Injection requires that the saturation effect of the saliency of motor and d-axis is comparatively obvious, when motor be surface-mount type or d-axis magnetic field saturated not obvious time, the method is all no longer applicable.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided a kind of permanent-magnetic synchronous motor rotor initial position detection device based on rotor fine motion, this apparatus structure is simple, and accuracy of detection is high, do not rely on the structure of motor, all applicable under empty load of motor or loading condition.
The utility model adopts following technical scheme.
Based on a permanent-magnetic synchronous motor rotor initial position detection device for rotor fine motion, comprise DC power supply, three-phase inverter, permagnetic synchronous motor, host computer, liquid crystal display screen, controller and current sensor.Described host computer is connected with controller, described DC power supply is connected with three-phase inverter, described three-phase inverter is connected with permagnetic synchronous motor through over-current sensor, and described current sensor output is connected with controller, and described controller output end is connected with liquid crystal display screen, three-phase inverter.
Compared with prior art, the beneficial effects of the utility model are.
Utilize controller to control the three-phase voltage of three-phase inverter output low frequency, make permanent-magnetic synchronous motor rotor generation fine motion, A, B phase current feedback that detection obtains by current sensor is to controller, and initial position of rotor estimated value is shown on liquid crystal display screen by controller.This apparatus structure is simple, and accuracy of detection is high, does not rely on electric machine structure, all applicable under empty load of motor or loading condition.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model.
Drawing reference numeral explanation.
1. DC power supply, 2. three-phase inverter, 3. permagnetic synchronous motor, 4. host computer, 5. liquid crystal display screen, 6. controller, 7. current sensor.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described further.
See accompanying drawing.Based on a permanent-magnetic synchronous motor rotor initial position detection device for rotor fine motion, comprise DC power supply (1), three-phase inverter (2), permagnetic synchronous motor (3), host computer (4), liquid crystal display screen (5), controller (6) and current sensor (7).Described host computer (4) is connected with controller (6), described DC power supply (1) is connected with three-phase inverter (2), described three-phase inverter (2) connects through over-current sensor (7) and permagnetic synchronous motor phase (3), described current sensor (7) output is connected with controller (6), and described controller (6) exports and is connected with liquid crystal display screen (5), three-phase inverter (2).Controller (6) is utilized to control the three-phase voltage of three-phase inverter (2) output low frequency, consequent electric current can produce pulsating torque, make permagnetic synchronous motor (3) rotor generation fine motion, the back-emf that rotor fine motion produces can react on electric moter voltage equation, thus the rotor position information of motor is presented in the current response of motor, current sensor (7) is utilized to detect the A obtained, B phase current feedback is to controller (6), controller (6) carries out Fourier analysis to electric current and calculates the position that can obtain rotor, finally initial position of rotor estimated value is shown on liquid crystal display screen (5).
Claims (3)
1. the permagnetic synchronous motor initial position detection device based on rotor fine motion, it is characterized in that: comprise DC power supply, three-phase inverter, permagnetic synchronous motor, host computer, liquid crystal display screen, controller and current sensor, described host computer is connected with controller, described DC power supply is connected with three-phase inverter, described three-phase inverter is connected with permagnetic synchronous motor through over-current sensor, described current sensor output is connected with controller, and described controller output end is connected with liquid crystal display screen, three-phase inverter.
2. a kind of permagnetic synchronous motor initial position detection device based on rotor fine motion according to claim 1, is characterized in that: described controller controls the three-phase voltage of three-phase inverter output low frequency, makes permanent-magnetic synchronous motor rotor generation fine motion.
3. a kind of permagnetic synchronous motor initial position detection device based on rotor fine motion according to claim 1, it is characterized in that: permanent-magnetic synchronous motor stator side A, B phase current feedback that detection obtains by described current sensor is to controller, and initial position of rotor estimated value is shown on liquid crystal display screen by controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520180908.5U CN204794778U (en) | 2015-03-30 | 2015-03-30 | PMSM initial position detection device based on rotor fine motion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520180908.5U CN204794778U (en) | 2015-03-30 | 2015-03-30 | PMSM initial position detection device based on rotor fine motion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204794778U true CN204794778U (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520180908.5U Expired - Fee Related CN204794778U (en) | 2015-03-30 | 2015-03-30 | PMSM initial position detection device based on rotor fine motion |
Country Status (1)
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| CN (1) | CN204794778U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233786A (en) * | 2016-12-14 | 2018-06-29 | 现代自动车株式会社 | The brshless DC motor drive control method and system of electric water pump |
-
2015
- 2015-03-30 CN CN201520180908.5U patent/CN204794778U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233786A (en) * | 2016-12-14 | 2018-06-29 | 现代自动车株式会社 | The brshless DC motor drive control method and system of electric water pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20160330 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |