CN104184375A - Switched reluctance motor control device and control method thereof - Google Patents
Switched reluctance motor control device and control method thereof Download PDFInfo
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- CN104184375A CN104184375A CN201310188160.9A CN201310188160A CN104184375A CN 104184375 A CN104184375 A CN 104184375A CN 201310188160 A CN201310188160 A CN 201310188160A CN 104184375 A CN104184375 A CN 104184375A
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Abstract
The invention relates to the technical field of a switched reluctance motor, and discloses a switched reluctance motor control device and a control method thereof. The switched reluctance motor control device comprises a PWM generating unit, a rotor position detecting unit and a stator coil driving unit; a switching unit which is used for modulating a PWM wave to M PWM waves with an angle difference according to rotor position that is detected by the rotor position detecting unit, wherein 2<=M<N, the M PWM waves with the angle difference are respectively input into adjacent M phases in an A-phase stator coil, a B-phase stator coil, a C-phase stator coil,..., and an N-phase stator coil, and furthermore the switching unit performs sequence switching among the phases in the A-phase, the B-phase, the C-phase,..., and the N-phase according to the rotation direction in a manner that M is used as a radix; and a control unit which controls the PWM generating unit and receives a rotor position signal of the rotor position detecting unit, thereby controlling the switching unit. The switched reluctance motor control device can realize effects of low speed, large torque and stable operation.
Description
Technical field
The invention belongs to reluctance motor control technology field, relate in particular to a kind of control device of switched reluctance motor and control method.
Background technology
Traditional switched Reluctance Motor Control method is according to magnetic resistance principle, according to rotor-position, applies excitation in turn to stator winding coil, produces continuous moment of torsion and orders about the rotation of motor bringing onto load; Existing switching magnetic-resistance control mode is that winding is produced to excitation in turn, simultaneously for specific motor and load, adjusts the angle of flow and adds PWM copped wave.
The selection of the concrete angle of flow of existing winding, when rotor with salient pole approaches corresponding stator salient poles in non-alignment position, in corresponding winding inductance rising area, when rotor with salient pole leaves corresponding stator salient poles in non-alignment position, in corresponding winding inductance decline district; If at inductance rising area excitation winding, will produce driving torque; If at inductance decline district excitation winding, will produce brake torque; So existing control mode is, energising excitation winding before rotor arrives inductance rising area, to obtain the required electric current of winding, before rotor arrives inductance decline district, power-off stops encouraging winding, in order to avoid produce brake torque in inductance decline district; But this mode is not suitable for the situation that motor operates in low-speed big load.All the time, to control be just difficult point and the focus in Motor Control Field to low-speed big always.
Patent of invention number 200680019780.8 (for the methods of control switch reluctance motor), disclose a kind of overlapping conduction time by winding, the method that reduces torque pulsation, power-up sequence is that A-AB-B-BC-C-CD-D-DA(is illustrated with 8/6 switched reluctance machines in this patent of invention specification); In the middle of conducting in turn, increased the state of overlapping conducting, can make like this torque ripple reduce.Allow winding part conduction time work in inductance decline district simultaneously, to produce brake torque, to offset a part of driving torque, make motor energy low cruise.But the shortcoming of this method is: the overlapping time of switching between winding is shorter, and the torque pulsation of reduction is limited; Winding part conduction time works in inductance decline district, has produced braking torque, has reduced electric efficiency; Under utmost point low speed, (as 20rpm) still can not even running.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of control device of switched reluctance motor, be intended to solve under utmost point low speed of the prior art still can not even running problem.
The present invention is achieved in that a kind of control device of switched reluctance motor, comprising:
PWM generating unit for generation of PWM ripple;
Rotor position detection unit for detection of rotor-position;
Be used for driving A, B, C ... the stator coil driver element of N phase stator coil;
The rotor-position detecting according to described rotor position detection unit, described PWM ripple being modulated into described in making after the PWM ripple on M road of differential seat angle has the M road PWM wavelength-division of differential seat angle not input described A, B, C ... adjacent M phase in N phase stator coil, and according to rotation direction at described A, B, C ... N be take M in mutually and as radix, between phase, is carried out the switch unit that order is switched, wherein 2≤M ﹤ N;
Control described PWM generating unit and receive described rotor position detection unit rotor-position signal, and control accordingly the control unit of described switch unit;
Described control unit is electrically connected to described PWM generating unit; Described control unit is electrically connected to described rotor position detection unit; Described control unit is electrically connected to described switch unit; Described switch unit respectively with described A, B, C ... N phase stator coil driver element is electrically connected to.
Further, the PWM ripple generating unit that described PWM generating unit is quasi sine.
Further, also comprise the rotation speed detection unit that rotor speed is detected, described rotation speed detection unit is electrically connected to described control unit.
Further, also comprise the current detecting unit that stator current is detected, described current detecting unit is electrically connected to described control unit.
Further, also comprise the protected location of switched reluctance machines out of service when stator current, voltage surpass set point, described protected location is electrically connected to described control unit.
Further, also comprise the display unit that running status is shown, described display unit is electrically connected to described control unit.
The present invention also provides a kind of control method of applying the control device of switched reluctance motor of the claims, comprises the steps:
S01, according to the space number of magnetic poles of stator winding and the number of phases, determine interpolar and alternate phase difference;
S02, the adjacent M in N phase winding send PWM ripple mutually, 2≤M ﹤ N wherein, and the phase difference of the PWM ripple of described M phase is determined by S01;
S03, according to direction of rotation, in alternate switching, send PWM ripple, make the stable rotation in resultant magnetic field of M phase stator winding; Rotor speed is determined by the switch speed of described switch unit.
Further, described PWM ripple is quasi-sine-wave.
Be compared with the prior art, in control device of switched reluctance motor provided by the invention, owing to having adopted the controller of the simultaneously heterogeneous complementary drive of making a concerted effort, so reached the technique effect of low speed high torque stable operation.
Accompanying drawing explanation
Fig. 1 is the first control device of switched reluctance motor schematic diagram provided by the invention;
Fig. 2 is the second control device of switched reluctance motor schematic diagram provided by the invention;
Fig. 3 is the third control device of switched reluctance motor schematic diagram provided by the invention;
Fig. 4 is the 4th kind of control device of switched reluctance motor schematic diagram provided by the invention;
Fig. 5 is the 5th kind of control device of switched reluctance motor schematic diagram provided by the invention;
Fig. 6 is the schematic diagram of the control motor operation of control device of switched reluctance motor provided by the invention;
Fig. 7 is the step schematic diagram of the control method of control device of switched reluctance motor provided by the invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The invention provides a kind of control device of switched reluctance motor, comprising:
PWM generating unit for generation of PWM ripple;
Rotor position detection unit for detection of rotor-position;
Be used for driving A, B, C ... the stator coil driver element of N phase stator coil;
The rotor-position detecting according to described rotor position detection unit, described PWM ripple being modulated into described in making after the PWM ripple on M road of differential seat angle has the M road PWM wavelength-division of differential seat angle not input described A, B, C ... adjacent M phase in N phase stator coil, and according to rotation direction at described A, B, C ... N be take M in mutually and as radix, between phase, is carried out the switch unit that order is switched, wherein 2≤M ﹤ N;
Control described PWM generating unit and receive described rotor position detection unit rotor-position signal, and control accordingly the control unit of described switch unit;
Described control unit is electrically connected to described PWM generating unit; Described control unit is electrically connected to rotor position detection unit; Described control unit is electrically connected to described switch unit; Described switch unit respectively with A, B, C ... N phase stator coil driver element is electrically connected to.
Owing to having adopted the controller of the simultaneously heterogeneous complementary drive of making a concerted effort, so reached the technique effect of low speed high torque stable operation.
Below in conjunction with specific embodiment, realization of the present invention is described in detail.
As shown in Figure 1, be the first embodiment provided by the invention.
A kind of control device of switched reluctance motor that the present embodiment provides, comprising: for generation of the PWM generating unit of PWM ripple; Rotor position detection unit for detection of rotor-position; Be used for driving A, B, C ... the stator coil driver element of N phase stator coil; The rotor-position detecting according to described rotor position detection unit, for PWM ripple being modulated into the PWM ripple on the M road of differential seat angle, 2≤M ﹤ N wherein, differential seat angle is determined according to the space progression of stator, stable to guarantee M resultant magnetic field vector, there is the M road PWM wavelength-division of differential seat angle not input A, B, C ... adjacent M phase in N phase stator coil, and according to rotation direction at A, B, C ... N be take M in mutually and as radix, between phase, is carried out the switch unit that order is switched; Control PWM generating unit, receive rotor position detection unit rotor-position signal, and control accordingly the control unit of switch unit; Control unit is electrically connected to PWM generating unit; Control unit is electrically connected to rotor position detection unit; Control unit is electrically connected to switch unit; Switch unit respectively with A, B, C ... N phase stator coil driver element is electrically connected to.
Owing to having adopted the controller of the simultaneously heterogeneous complementary drive of making a concerted effort, so reached the technique effect of low speed high torque stable operation.
Further, the PWM ripple generating unit that described PWM generating unit is quasi sine, owing to having adopted quasi-sine-wave, has reached drive efficiency high, the effect that noise is little.
As shown in Figure 2, further, also comprise the rotation speed detection unit that rotor speed is detected, described rotation speed detection unit is electrically connected to described control unit, by introducing speed, feeds back, and has reached stable object.
As shown in Figure 3, further, also comprise the current detecting unit that stator current is detected, described current detecting unit is electrically connected to described control unit, by introducing current feedback, carries out pid algorithm control, reaches the object of stable operation.
As shown in Figure 4, further, also comprise the protected location of switched reluctance machines out of service when stator current, voltage surpass set point, described protected location is electrically connected to described control unit, has improved like this reliability of operation.
As shown in Figure 5, further, also comprise the display unit that running status is shown, described display unit is electrically connected to described control unit, has so just reached the object of real-time monitoring running status.
As shown in Figure 7, the present invention also provides a kind of control method of applying the control device of switched reluctance motor of the claims, comprises the steps:
S01, according to the space number of magnetic poles of stator winding and the number of phases, determine interpolar and alternate phase difference;
S02, the adjacent M in N phase winding send PWM ripple mutually, 2≤M ﹤ N wherein, and the phase difference of the PWM ripple of M phase is determined by S01;
S03, according to direction of rotation, in alternate switching, send PWM ripple, make the stable rotation in resultant magnetic field of M phase stator winding; Rotor speed is determined by the switch speed of switch unit.
Further, PWM ripple is quasi-sine-wave, has reached drive efficiency high, the effect that noise is little.
As shown in Figure 6, three-phase 12/8 switched reluctance machines of take is example, and rotor with salient pole number is 8, number of stator slots is 12, works under extremely slow-revving heavy load, for example 20RPM, if adopt conventional control device, there will be that rotating speed is too high, electric current is too large or torque is too little, can not stable speed operation.
When motor low cruise, encourage two phase windings simultaneously, Figure 6 shows that initial position of rotor, when motor rotates, power-up sequence is: AB-BC-CA, two-phase winding current adopts the way of quasi-sine-wave PWM modulation, to form quasi-sine-wave stator flux orientation, control (SFOC, Stator Flux Oriented Control), lag behind angle of sine-wave current of previous winding of the sine-wave current of a rear winding, a synthetic comparatively stable magnetic vector, has guaranteed the level and smooth of motor torque under low speed.
The foregoing is only better embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a control device of switched reluctance motor, is characterized in that: comprising:
PWM generating unit for generation of PWM ripple;
Rotor position detection unit for detection of rotor-position;
Be used for driving A, B, C ... the stator coil driver element of N phase stator coil;
The rotor-position detecting according to described rotor position detection unit, described PWM ripple being modulated into described in making after the PWM ripple on M road of differential seat angle has the M road PWM wavelength-division of differential seat angle not input described A, B, C ... adjacent M phase in N phase stator coil, and according to rotation direction at described A, B, C ... N be take M in mutually and as radix, between phase, is carried out the switch unit that order is switched, wherein 2≤M ﹤ N;
Control described PWM generating unit and receive described rotor position detection unit rotor-position signal, and control accordingly the control unit of described switch unit;
Described control unit is electrically connected to described PWM generating unit; Described control unit is electrically connected to described rotor position detection unit; Described control unit is electrically connected to described switch unit; Described switch unit respectively with described A, B, C ... N phase stator coil driver element is electrically connected to.
2. control device of switched reluctance motor as claimed in claim 1, is characterized in that: the PWM ripple generating unit that described PWM generating unit is quasi sine.
3. control device of switched reluctance motor as claimed in claim 1 or 2, is characterized in that: also comprise the rotation speed detection unit that rotor speed is detected, described rotation speed detection unit is electrically connected to described control unit.
4. control device of switched reluctance motor as claimed in claim 1 or 2, is characterized in that: also comprise the current detecting unit that stator current is detected, described current detecting unit is electrically connected to described control unit.
5. control device of switched reluctance motor as claimed in claim 4, is characterized in that: also comprise the protected location of switched reluctance machines out of service when stator current, voltage surpass set point, described protected location is electrically connected to described control unit.
6. control device of switched reluctance motor as claimed in claim 1 or 2, is characterized in that: also comprise the display unit that running status is shown, described display unit is electrically connected to described control unit.
7. a control method for the control device of switched reluctance motor described in application rights requirement 1 to 6 any one, is characterized in that: comprise the steps:
S01, according to the space number of magnetic poles of stator winding and the number of phases, determine interpolar and alternate phase difference;
S02, the adjacent M in N phase winding send PWM ripple mutually, 2≤M ﹤ N wherein, and the phase difference of the PWM ripple of described M phase is determined by S01;
S03, according to direction of rotation, in alternate switching, send PWM ripple, make the stable rotation in resultant magnetic field of M phase stator winding; Rotor speed is determined by the switch speed of described switch unit.
8. the control method of application switch reluctance motor control assembly as claimed in claim 7, is characterized in that: described PWM ripple is quasi-sine-wave.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310188160.9A CN104184375B (en) | 2013-05-20 | 2013-05-20 | Control device of switched reluctance motor and control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310188160.9A CN104184375B (en) | 2013-05-20 | 2013-05-20 | Control device of switched reluctance motor and control method |
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| CN104184375A true CN104184375A (en) | 2014-12-03 |
| CN104184375B CN104184375B (en) | 2017-07-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111682806A (en) * | 2020-06-17 | 2020-09-18 | 山东艾磁驱动科技有限公司 | Method for low-speed vibration operation of 8-6 pole switch reluctance motor for food machinery |
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| JP2003088156A (en) * | 2001-09-11 | 2003-03-20 | Sanyo Electric Co Ltd | Controller of brushless motor |
| CN101453184A (en) * | 2007-11-30 | 2009-06-10 | 北京中纺锐力机电有限公司 | Speed regulating system for switch reluctance motor |
| CN201758378U (en) * | 2010-03-03 | 2011-03-09 | 中国矿业大学 | Speed regulation fan switch magnetic resistance speed regulation electromotor device |
| CN102931901A (en) * | 2012-10-31 | 2013-02-13 | 奇瑞汽车股份有限公司 | Switched reluctance motor generator control system and control method thereof |
| CN203289363U (en) * | 2013-05-20 | 2013-11-13 | 捷和电机制品(深圳)有限公司 | Control device of switched reluctance motor |
-
2013
- 2013-05-20 CN CN201310188160.9A patent/CN104184375B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003088156A (en) * | 2001-09-11 | 2003-03-20 | Sanyo Electric Co Ltd | Controller of brushless motor |
| CN101453184A (en) * | 2007-11-30 | 2009-06-10 | 北京中纺锐力机电有限公司 | Speed regulating system for switch reluctance motor |
| CN201758378U (en) * | 2010-03-03 | 2011-03-09 | 中国矿业大学 | Speed regulation fan switch magnetic resistance speed regulation electromotor device |
| CN102931901A (en) * | 2012-10-31 | 2013-02-13 | 奇瑞汽车股份有限公司 | Switched reluctance motor generator control system and control method thereof |
| CN203289363U (en) * | 2013-05-20 | 2013-11-13 | 捷和电机制品(深圳)有限公司 | Control device of switched reluctance motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111682806A (en) * | 2020-06-17 | 2020-09-18 | 山东艾磁驱动科技有限公司 | Method for low-speed vibration operation of 8-6 pole switch reluctance motor for food machinery |
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| CN104184375B (en) | 2017-07-14 |
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