CN103929100A - Method for determining starting initial position of permanent magnet synchronous motor - Google Patents
Method for determining starting initial position of permanent magnet synchronous motor Download PDFInfo
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- CN103929100A CN103929100A CN201410123889.2A CN201410123889A CN103929100A CN 103929100 A CN103929100 A CN 103929100A CN 201410123889 A CN201410123889 A CN 201410123889A CN 103929100 A CN103929100 A CN 103929100A
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Abstract
The invention provides a method for determining the starting initial position of a permanent magnet synchronous motor. The position of a rotor at the initial position can be accurately determined, and the reliability is high. The method for determining the starting initial position of the permanent magnet synchronous motor includes the following steps: (1) applying a first current to a stator of the motor, and attracting the rotor to be at the first position through a magnetic field generated through the first current; (2) applying a second current to the stator of the motor, and attracting the rotor to be at the second position through a magnetic field generated through the second current, wherein the phase difference between the second current and the first current ranges from 60 degrees to 120 degrees. According to the method, positioning is carried out two times through the first current and the second current, and it is guaranteed that positioning can be accurately carried out when the rotor of the motor is stopped at any angle; compared with the prior art, the method has the advantages of being accurate and reliable in positioning, free of adding of sensors and easy to operate.
Description
Technical field
The present invention relates to a kind of magneto starting method, be specifically related to a kind of permagnetic synchronous motor startup initial position and determine method.
Background technology
High-speed permanent magnetic synchronous motor rotating speed is conventionally up to tens thousand of revs/min, position-sensor-free on motor, in order to improve control performance, the signal such as voltage, electric current by motor carries out back-emf estimation, the methods such as flux observation, can obtain motor position information, realize the vector control of high-speed permanent magnetic synchronous motor.
But back-emf is very little when the slow-speed of revolution or zero rotating speed, estimation difficulty.Particularly, in the time that zero-speed starts, if cannot know rotor-position, starting reliability will reduce greatly.
Some document adopts high-frequency signal injection, the positional information of rotor can be detected, but this is based on saliency in the time of low speed, for Non-Salient-Pole Motor effect bad, and this method more complicated, it is large that program realizes difficulty, practical application difficulty.
Also in some article, adopt the asynchronous machine Starting mode of variable voltage variable frequency, but the reliability starting is like this very low, starts mortality high.
Also have in some application and adopt rotor pre-determined bit, by giving motor any two-phase energising, generate a resultant magnetic field method of rotor location is obtained to rotor position information, thereby realize open-loop start-up.This localization method adopts one-time positioning, can have the possibility of one-time positioning failure.
Summary of the invention
The object of the invention is for above-mentioned the deficiencies in the prior art, provide a kind of permagnetic synchronous motor to start initial position and determine method, can accurately determine the position of initial position rotor, its reliability is higher.
Technical scheme of the present invention is achieved in that
A kind of permagnetic synchronous motor starts initial position and determines method, carries out in the following manner:
(1) on motor stator, apply the first electric current, rotor is attracted to primary importance by the magnetic field producing by the first electric current;
(2) on motor stator, apply the second electric current, produce magnetic field rotor is attracted to the second place by the second electric current, the phase difference of the second electric current and the first electric current is 60～120 °.
Described rotor is rolling friction type rotor, and the moment of torsion that the first electric current and the second electric current produce is 1.5～2.5 times of load torque while starting.
Described rotor is sliding friction type rotor, and the moment of torsion that the first electric current and the second electric current produce is 3～5 times of load torque while starting.
The speed that speed when rotor turns to the second place from primary importance is 150rpm-300rpm.
Described the first electric current and the second electric current are held time and are not less than 200ms.
Preferably, the phase difference of described the first electric current and the second electric current is 90 °.
Described the first electric current is identical with the amplitude of the second electric current.
In the present invention, carry out location twice by the first electric current and the second electric current, ensure that rotor is parked in arbitrarily angled, can accurately locate.Compared with prior art, its registration, reliable, and do not need to increase transducer, operate fairly simple.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is embodiment 1 rotor primary importance schematic diagram.
Fig. 2 is embodiment 1 rotor second place schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not paying the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
A kind of permagnetic synchronous motor starts initial position and determines method, carries out in the following manner:
(1) on motor stator, apply the first electric current, rotor is attracted to primary importance by the magnetic field producing by the first electric current;
(2) on motor stator, apply the second electric current, produce magnetic field rotor is attracted to the second place by the second electric current, the phase difference of the second electric current and the first electric current is 60～120 °.
Described rotor is rolling friction type rotor, and the moment of torsion that the first electric current and the second electric current produce is 1.5～2.5 times of load torque while starting.Now, can guarantee that the moment of torsion producing is greater than the load torque that need to overcome while startup.
Described rotor is sliding friction type rotor, and the moment of torsion that the first electric current and the second electric current produce is 3～5 times of load torque while starting.Now, can guarantee that the moment of torsion producing is greater than the load torque that need to overcome while startup.
The speed that speed when rotor turns to the second place from primary importance is 150rpm-300rpm, had so both ensured that rotor can too fastly not forward the second place to and cause vibration, simultaneously also can be because of the oversize motor stator heating severity that allows transit time.
Described the first electric current and the second electric current are held time and are not less than 200ms, have applied electric current at every turn, maintain a period of time, can ensure that rotor is adsorbed onto the position of appointment fully, and reach stable state.
Preferably, the phase difference of described the first electric current and the second electric current is 90 °, and described the first electric current is identical with the amplitude of the second electric current.
In the present invention, pass into successively the first electric current and the second electric current, can carry out twice location, be positioned with following benefit for twice: can ensure that rotor is parked in arbitrarily angled, can accurately locate.Such as, if rotor is parked near 180 positions, degree angle, when the phase angle of the first electric current is 0 ° of angle, because stator and rotor magnetic vector approaches parallel and reverse, cannot produce enough large torque, rotor can not overcome drag torque and rotate to 0 position, degree angle, will cause locating for the first time failure, cannot obtain rotor position information.Adopt twice location can address this problem, even cannot produce torque because stator and rotor magnetic vector differs 180 ° while location for the first time, because the phase difference between the second electric current and the first electric current is at 60～120 °, now the second electric current still can produce enough large torque, rotor is navigated to the second place, thereby accurately obtain rotor position information.
Embodiment 1:
Taking two pole permanent-magnet synchronous machines as example, the course of work of the present invention is as follows:
Rotor is made up of a N utmost point, a S utmost point, first in stator, passes into first electric current of 0 °
(the phase angle of the first electric current is 0 °), the range value of the first electric current is 10A, and maintains the first electric current 200ms, locates for the first time, p-m rotor is adsorbed onto to the position of 0 ° of vector, as shown in Figure 1, namely primary importance.Afterwards, be second electric current of 90 ° to passing into phase place in stator, the amplitude of the second electric current is also 10A, and maintains 200ms, and now rotor turns to the second place, and as shown in Figure 2, now rotor is adsorbed to the vector position of 90 °.Speed when rotor turns to the second place from primary importance is 150rpm.
By this location of twice, the position of rotor just can specify electric motor starting time, just can be according to the phase angle of the given starting current of this rotor-position when startup, ensures that electric current is all for generation of torque.
Embodiment 2:
Taking two pole permanent-magnet synchronous machines as example, the course of work of the present invention is as follows: (1) first passes into amplitude in stator is that 14A, phase place are the first electric current of 30 ° of vectors, maintain the first electric current 400ms, rotor is located for the first time, rotor is attracted to primary importance; (2) in stator, passing into amplitude is that 14A, phase place are second electric current of 120 °, maintains the second electric current 400ms, and rotor is carried out to the second location, and rotor is attracted to the second place.Speed when rotor turns to the second place from primary importance is 250rpm.
After the first electric current, twice location of the second electric current, the second place obtaining is the exact position of rotor.
Embodiment 3:
Taking two pole permanent-magnet synchronous machines as example, the course of work of the present invention is as follows: (1) first passes into amplitude in stator is that 14A, phase place are the first electric current of 0 ° of vector, maintain the first electric current 400ms, rotor is located for the first time, rotor is attracted to primary importance; (2) in stator, passing into amplitude is that 14A, phase place are second electric current of 60 °, maintains the second electric current 400ms, and rotor is carried out to the second location, and rotor is attracted to the second place.Speed when rotor turns to the second place from primary importance is 200rpm.
After the first electric current, twice location of the second electric current, the second place obtaining is the exact position of rotor.
Embodiment 4:
Taking two pole permanent-magnet synchronous machines as example, the course of work of the present invention is as follows: (1) first passes into amplitude in stator is that 14A, phase place are the first electric current of 20 ° of vectors, maintain the first electric current 300ms, rotor is located for the first time, rotor is attracted to primary importance; (2) in stator, passing into amplitude is that 14A, phase place are second electric current of 140 °, maintains the second electric current 300ms, and rotor is carried out to the second location, and rotor is attracted to the second place.Speed when rotor turns to the second place from primary importance is 300rpm.After the first electric current, twice location of the second electric current, the second place obtaining is the exact position of rotor.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. permagnetic synchronous motor starts initial position and determines a method, it is characterized in that carrying out in the following manner:
(1) on motor stator, apply the first electric current, rotor is attracted to primary importance by the magnetic field producing by the first electric current;
(2) on motor stator, apply the second electric current, produce magnetic field rotor is attracted to the second place by the second electric current, the phase difference of the second electric current and the first electric current is 60～120 °.
2. permagnetic synchronous motor according to claim 1 starts initial position and determines method, it is characterized in that: described rotor is rolling friction type rotor, and the moment of torsion that the first electric current and the second electric current produce is 1.5～2.5 times of load torque while starting.
3. permagnetic synchronous motor according to claim 1 starts initial position and determines method, it is characterized in that: described rotor is sliding friction type rotor, and the moment of torsion that the first electric current and the second electric current produce is 3～5 times of load torque while starting.
4. permagnetic synchronous motor startup initial position according to claim 1 is determined method, it is characterized in that: the speed that speed when rotor turns to the second place from primary importance is 150rpm-300rpm.
5. start initial position according to the permagnetic synchronous motor one of claim 1～4 Suo Shu and determine method, it is characterized in that: described the first electric current and the second electric current are held time and be not less than 200ms.
6. permagnetic synchronous motor startup initial position according to claim 5 is determined method, it is characterized in that: the phase difference of described the second electric current and the first electric current is 90 °.
7. permagnetic synchronous motor startup initial position according to claim 1 is determined method, it is characterized in that: described the first electric current is identical with the amplitude of the second electric current.
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| CN201410123889.2A CN103929100A (en) | 2014-03-28 | 2014-03-28 | Method for determining starting initial position of permanent magnet synchronous motor |
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| CN201410123889.2A CN103929100A (en) | 2014-03-28 | 2014-03-28 | Method for determining starting initial position of permanent magnet synchronous motor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105703684A (en) * | 2016-03-16 | 2016-06-22 | 广州视源电子科技股份有限公司 | Control method and system for compressor startup |
| CN106100488A (en) * | 2016-08-16 | 2016-11-09 | 上海金脉电子科技有限公司 | Low-power permagnetic synchronous motor non-position sensor vector control method |
| CN106100468A (en) * | 2016-07-08 | 2016-11-09 | 深圳市科陆驱动技术有限公司 | A kind of rotor null adjustment method, device, circuit and rotary transformer |
| CN112039373A (en) * | 2020-09-03 | 2020-12-04 | 苏州臻迪智能科技有限公司 | Rotor angle detection method and device based on linear Hall system |
| CN112600478A (en) * | 2020-12-14 | 2021-04-02 | 广东交通职业技术学院 | Drive control system and method of high-frequency injection permanent magnet synchronous motor |
| CN113972868A (en) * | 2021-10-28 | 2022-01-25 | 珠海格力电器股份有限公司 | Permanent magnet synchronous motor starting control method and device and permanent magnet synchronous motor |
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2014
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105703684A (en) * | 2016-03-16 | 2016-06-22 | 广州视源电子科技股份有限公司 | Control method and system for compressor startup |
| CN106100468A (en) * | 2016-07-08 | 2016-11-09 | 深圳市科陆驱动技术有限公司 | A kind of rotor null adjustment method, device, circuit and rotary transformer |
| CN106100488A (en) * | 2016-08-16 | 2016-11-09 | 上海金脉电子科技有限公司 | Low-power permagnetic synchronous motor non-position sensor vector control method |
| CN112039373A (en) * | 2020-09-03 | 2020-12-04 | 苏州臻迪智能科技有限公司 | Rotor angle detection method and device based on linear Hall system |
| CN112600478A (en) * | 2020-12-14 | 2021-04-02 | 广东交通职业技术学院 | Drive control system and method of high-frequency injection permanent magnet synchronous motor |
| CN113972868A (en) * | 2021-10-28 | 2022-01-25 | 珠海格力电器股份有限公司 | Permanent magnet synchronous motor starting control method and device and permanent magnet synchronous motor |
| CN113972868B (en) * | 2021-10-28 | 2023-09-22 | 珠海格力电器股份有限公司 | Permanent magnet synchronous motor starting control method and device and permanent magnet synchronous motor |
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Application publication date: 20140716 |