CN201349192Y - Position measuring and speed measuring and controlling device for rotor of synchronous motor - Google Patents
Position measuring and speed measuring and controlling device for rotor of synchronous motor Download PDFInfo
- Publication number
- CN201349192Y CN201349192Y CNU2009200378467U CN200920037846U CN201349192Y CN 201349192 Y CN201349192 Y CN 201349192Y CN U2009200378467 U CNU2009200378467 U CN U2009200378467U CN 200920037846 U CN200920037846 U CN 200920037846U CN 201349192 Y CN201349192 Y CN 201349192Y
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- rotor
- power converter
- stator
- synchronous motor
- speed
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 32
- 238000004804 winding Methods 0.000 claims abstract description 16
- 238000005259 measurement Methods 0.000 claims description 9
- 230000011664 signaling Effects 0.000 claims description 5
- 230000005284 excitation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Abstract
A position measuring and speed measuring and controlling device for a rotor of a synchronous motor adopts the structure that a stator power converter connected with a power triphase power switch is arranged in a wiring cabinet; the stator power converter is connected with three phrases of the synchronous motor stator winding; a voltage transformer is connected to the stator power converter; the voltage transformer is connected with a system controller through a signal filter; and the system controller is connected with the stator power converter, a rotor power converter and a speed demand signal device. The rotor power converter is connected with the rotor winding of the synchronous motor, the system controller receives rotational speed feedback signals which are compared with demand signals, and at the same time controls the stator power converter and the rotor power converter, so as to change the output voltage and realize quick and accurate control to the rotational speed of the synchronous motor. The device has the advantages of high control precision, high reliability, good low-velocity dynamic response characteristics, no speed sensor, greatly simplified structure, small size, easy implementation and convenient operation.
Description
Technical field
The utility model relates to a kind of motor rotor position to be measured and the speed measurement and control technology, and especially a kind of synchronous motor rotor position of electric excitation type that is applicable to is measured and the speed measurement and control device.
Background technology
In high performance synchronous motor vector control system, the closed-loop control link of rotor-position and speed generally is absolutely necessary.Known speed measurement of asynchronous motor method has two kinds: a kind of is to adopt mechanical speed transducers such as photoelectric code disk, tachogenerator to carry out motor speed to detect, and the feedback tach signal.This system is relatively poor to the detectability of rotor-position, and there is installation question in the mechanical speed transducer simultaneously, and the system maintenance work amount is bigger; Second kind is utilize to detect physical quantitys such as motor stator voltage, electric current, carries out position and the velocity estimation speed measuring device with the Speedless sensor that replaces mechanical pick-up device in conjunction with the asymmetry of rotor magnetic circuit; Though this system has solved the problem that the mechanical speed transducer brings, reduced system cost, but present evaluation method is strong to the dependence of the parameter of electric machine, and calculating and control ratio have the sensing system complexity, respond slower, the low speed dynamic response characteristic is relatively poor, therefore, is badly in need of reliability and accuracy that a kind of good rotor-position and speed measurement method and control corresponding device improve the synchronous motor drive control system.
Summary of the invention
The purpose of this utility model is the weak point that overcomes in the prior art, provides a kind of response speed fast, and simple and reliable and synchronous motor rotor position that precision is high is measured and the speed measurement and control device.
Synchronous motor rotor position of the present utility model is measured and the speed measurement and control device: comprise the wiring cabinet, be provided with the stator power inverter that is connected with three-phase power switch in the wiring cabinet, three outputs of stator power inverter respectively with the three-phase U of synchronous motor stator winding, V, W is connected, the U that the stator power inverter links to each other with the synchronous motor stator winding links to each other with V mutually and is connected to voltage transformer, the output of voltage transformer is connected with system controller through traffic filter, be connected with stator power inverter and rotor power converter on the output of system controller respectively, be connected with the velocity setting signalling on its input; The output of rotor power converter is connected with the synchronous electric motor rotor winding, and rotor power converter connects the rotor single phase alternating current power supply by the single phase poaer supply switch; The stator power inverter connects three phase mains by three-phase power switch; Be connected with the motor speed display on the described system controller.
The beneficial effects of the utility model: utilize the mechanical structure of synchronous motor itself and electromagnetic relationship wherein, in the synchronous electric motor rotor winding, inject the high frequency excitation signal, because the residing position of motor rotor difference, the high frequency potential signal that the high frequency pulsating magnetic potential is responded in stator winding also changes thereupon, utilize voltage transformer to obtain high-frequency signal, detect high-frequency signal and can determine the position of rotor and the rotating speed of synchronous motor.Rotor-position and the tach signal measured are fed back to controller, and controller just can be controlled the speed of synchronous motor exactly according to given signal.Be applicable to the observing and controlling of the synchronous motor of distributed polar rotor and salient pole rotor.Compared with prior art, omit velocity transducer, simplified system configuration greatly, strengthened the reliability of system, the velocity control accuracy height, the low speed dynamic response characteristic is good, and is easy to implement, easy to operate, alleviated the maintenance workload of system, have practicality widely.
Description of drawings
Fig. 1 structural representation of the present utility model.
Fig. 2 is a fundamental diagram of the present utility model.
Among the figure: 1-stator three-phase alternating-current supply; The 2-three-phase power switch; 3-stator power inverter; 4-motor speed display; 5-rate signal setter; The 6-system controller; The 7-voltage transformer; The 8-traffic filter; 9-rotor single phase alternating current power supply; 10-single phase poaer supply switch; The 11-rotor power converter; The 12-stator winding; 13-synchronous motor stator; The 14-synchronous electric motor rotor; 15-synchronous electric motor rotor winding; Wiring cabinet-A.
Embodiment
The utility model will be further described below in conjunction with the embodiment in the accompanying drawing:
Synchronous motor rotor position of the present utility model is measured and the speed measurement and control device, comprise a wiring cabinet A, concentrate in the wiring cabinet A stator power inverter 3, motor speed display 4, velocity setting signalling 5, system controller 6, voltage transformer 7, traffic filter 8, rotor power converter 11 are housed.Stator power inverter 3 is connected with three-phase power switch 2, three outputs of stator power inverter 3 respectively with the three-phase U of synchronous motor stator winding 12, V, W is connected, stator power inverter 3 links to each other with voltage transformer 7, the output of voltage transformer 7 is connected with traffic filter 8, traffic filter 8 connected system controllers 6, system controller 6 adopts dsp controller, the output of system controller 6 connects stator power inverter 3 and rotor power converter 11 respectively, be synchronous motor output three-phase voltage by controller 6 control stator power inverters 3, by controller 6 control rotor power converter 11 output dc voltages, velocity setting signalling 5 links to each other with system controller 6 respectively with motor speed display 4 simultaneously; The output of rotor power converter 11 is connected with synchronous electric motor rotor winding 15, and rotor power converter 11 connects rotor single phase alternating current power supply 9 by single phase poaer supply switch 10; Stator power inverter 3 connects three phase mains 1 by three-phase power switch 2.Rotor power converter 11 has been injected a high frequency voltage excitation signal, with detection rotor position and speed on synchronous electric motor rotor winding 15 in output dc voltage; Detect the voltage signal that contains radio-frequency component in the synchronous motor stator winding 12 with voltage transformer 7, through traffic filter 8 Filtering Processing, can obtain the position signalling and the tach signal of synchronous electric motor rotor, the speed feedback signal that system controller 6 acceptance are transmitted from traffic filter 8, after comparing from rate signal setter 5 signals, send control signal, the control signal that stator power inverter 3 and rotor power converter 11 are sent according to system controller 6 changes its output voltage, thereby realizes controlling rapidly and accurately the rotating speed of synchronous motor.
Claims (2)
1, a kind of synchronous motor rotor position is measured and the speed measurement and control device, it is characterized in that: it comprises wiring cabinet (A), be provided with the stator power inverter (3) that is connected with three-phase power switch (2) in the wiring cabinet (A), three outputs of stator power inverter (3) respectively with the three-phase U of synchronous motor stator winding (12), V, W is connected, the U that stator power inverter (3) links to each other with synchronous motor stator winding (12) links to each other with V mutually and is connected to voltage transformer (7), the output of voltage transformer (7) is connected with system controller (6) through traffic filter (8), be connected with stator power inverter (3) and rotor power converter (11) on the output of system controller (6) respectively, be connected with velocity setting signalling (5) on its input; The output of rotor power converter (11) is connected with synchronous electric motor rotor winding (15), and rotor power converter (11) connects rotor single phase alternating current power supply (9) by single phase poaer supply switch (10); Stator power inverter (3) connects three phase mains (1) by three-phase power switch (2).
2, synchronous motor rotor position according to claim 1 is measured and the speed measurement and control device, it is characterized in that, is connected with motor speed display (4) on the described system controller (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200378467U CN201349192Y (en) | 2009-01-23 | 2009-01-23 | Position measuring and speed measuring and controlling device for rotor of synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200378467U CN201349192Y (en) | 2009-01-23 | 2009-01-23 | Position measuring and speed measuring and controlling device for rotor of synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201349192Y true CN201349192Y (en) | 2009-11-18 |
Family
ID=41368655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200378467U Expired - Lifetime CN201349192Y (en) | 2009-01-23 | 2009-01-23 | Position measuring and speed measuring and controlling device for rotor of synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201349192Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789746B (en) * | 2009-01-23 | 2011-08-10 | 中国矿业大学 | Method and device for rotor position measurement and speed measurement and control of synchronous motor |
| CN102624298A (en) * | 2011-01-25 | 2012-08-01 | 日本电产高科电机控股公司 | Motor |
| CN102939709A (en) * | 2010-04-16 | 2013-02-20 | 戴森技术有限公司 | Controller for a brushless motor |
-
2009
- 2009-01-23 CN CNU2009200378467U patent/CN201349192Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789746B (en) * | 2009-01-23 | 2011-08-10 | 中国矿业大学 | Method and device for rotor position measurement and speed measurement and control of synchronous motor |
| CN102939709A (en) * | 2010-04-16 | 2013-02-20 | 戴森技术有限公司 | Controller for a brushless motor |
| CN102939709B (en) * | 2010-04-16 | 2016-03-16 | 戴森技术有限公司 | For the controller of brushless motor |
| CN102624298A (en) * | 2011-01-25 | 2012-08-01 | 日本电产高科电机控股公司 | Motor |
| CN102624298B (en) * | 2011-01-25 | 2016-07-13 | 日本电产高科电机控股公司 | Motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20091118 Effective date of abandoning: 20090123 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20091118 Effective date of abandoning: 20090123 |