CN201315561Y - Device for realizing the running method of switched reluctance motor - Google Patents
Device for realizing the running method of switched reluctance motor Download PDFInfo
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- CN201315561Y CN201315561Y CNU2008201429989U CN200820142998U CN201315561Y CN 201315561 Y CN201315561 Y CN 201315561Y CN U2008201429989 U CNU2008201429989 U CN U2008201429989U CN 200820142998 U CN200820142998 U CN 200820142998U CN 201315561 Y CN201315561 Y CN 201315561Y
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Abstract
The utility model relates to a device for realizing the running method of a switched reluctance motor, mainly comprising a photoelectric encoder and a DSP controller. The photoelectric encoder is used for detecting the position of a rotor of the switched reluctance motor, and the DSP controller is used for obtaining the specific position of the rotor according to the value of pulse output by the photoelectric encoder; in the running process, the switched reluctance motor is energized by a two-phase winding to run from the initial position; in the running process of the switched reluctance motor in a stepping angle, before the rotor pole reaches a position where the rotor pole is aligned with a fore-phase excitation stator pole, the current of the fore-phase rotor winding is cut off, and the switched reluctance motor is energized by a later single phase stator winding so as to be provided with required dynamic torque until the rotor is rotated into the next stepping angle to repeat the process. The current amplitude needed by the device for operating a switched reluctance motor is smaller than the current amplitude needed by a single-phase excitation, thereby, the current capacity of a main switching tube can be reduced, the cost of the system can be lowered, and the influence from magnetic circuit saturation is avoided when larger rotation torque is output so that the iron core loss is lessened and the efficiency of the switched reluctance motor is improved.
Description
Technical field:
The utility model relates to a kind of implement device of switched reluctance machines operation method.Belong to the running of switched reluctance machines, be applicable to three-phase, four phases, five phase switch reluctance motors.
Technical background:
In recent years, switched reluctance machines is simple in structure, and advantages such as low price cause the extensive concern of various countries' Electric Drive circle, and its application and development have obtained tangible progress.The steady operation working method of switched reluctance machines is single-phase winding energising, and torque is produced by a phase winding.The maximum weak point that the working method of single-phase winding conducting exists is that torque pulsation is big.At the limitation of single-phase conducting, the scholar of Korea S in 1999 has proposed a kind of threephase switch reluctance motor two-phase novel controlling schemes of excitation simultaneously.This scheme is similar to the three-phase six-beat operation of stepping motor, any moment all has two phase windings to power simultaneously, has avoided the unexpected switching of winding, thereby has reduced the torque ripple of motor greatly, reduce the noise of motor, and improved the torque output of motor.Its shortcoming is: employing two-phase conduction mode, since the cause of winding afterflow, the situation of conducting simultaneously of physical presence two phase windings and the conducting simultaneously of three phase windings, and the feasible winding of partly switching on produces negative torque, has increased the complexity of control.And, along with turning to stator poles, rotor pole overlaps the position, and magnetic higher in the part iron core is close to motor generation considerable influence, has increased the loss of motor and then has reduced electric efficiency.
Summary of the invention:
The purpose of this utility model is to provide a kind of implement device of switched reluctance machines operation method.At three-phase, four phases, five phase switch reluctance motors commonly used, propose: in a step angle of motor, carry out the mixing electrifying method that the energising of two-phase winding switches to single-phase winding energising in specific stator rotor relative position place.Such operation method, required current amplitude help reducing the current capacity of main switch less than the required current amplitude of single-phase excitation, reduce system cost, have avoided the saturated influence of magnetic circuit in the big torque of output.
The step that the operation method of a kind of switched reluctance machines that the utility model provides comprises:
Repeat once every a step angle in magnetic field due to the stepwise operation of switched reluctance machines, switched reluctance machines turns round from initial position two-phase stator winding electrifying, the switched reluctance machines of two phase windings energisings can only folk prescription to starting operation, according to switched reluctance machines starting positive direction, in a step angle in the operation process, when rotor pole arrive with the preceding stator poles of excitation mutually aligned position before end preceding phase stator winding electric current, provide power torque to rotate by the single-phase energising of back phase stator winding, change next step angle until rotor over to along positive direction, repeat said process.
Described positive direction is the direction of switched reluctance machines from the initial position starting operation.
Be in the step angle mutually before described, rotate positive direction according to switched reluctance machines, the stator that overlaps with rotor pole mutually at first.
Be step angle of the lasting energising of winding after described mutually, and will change the stator phase that continues conducting in the next step angle at rotor.
Described initial position is that according to the rotation positive direction of switched reluctance machines, stator poles center line and rotor pole center line differ a step angle position.
Described aligned position is stator poles center line and rotor pole central lines place.
The implement device of a kind of switched reluctance machines operation method that the utility model provides mainly comprises: photoelectric encoder and dsp controller, and the rotor position detection of motor adopts photoelectric encoder, and photoelectric encoder links to each other with rotor is coaxial.What the photoelectric encoder output pulse signal imported dsp controller into catches pin CAP/QEP, dsp controller obtains the rotor particular location by the recording impulse number, the pulse-width modulation control signal (PWM) of output logic level type, come the break-make of switching tube in the control switch reluctance motor power circuit, control the conducting switch off time of each phase winding electric current.
The utility model is compared with existing method, have the following advantages: the switched reluctance machines output torque height that adopts this kind control method, the pull up torque of output was the breakdown torque of single-phase energising output torque during two-phase was switched on, the twice of breakdown torque when the breakdown torque of output is single-phase the energising during the two-phase energising.Adjusting stator powers constantly and power-cut time mutually, before aligned position, arrive the single-phase energising of back phase winding by preceding phase winding current switching, the path of low magnetic resistance can be occurred in stator poles rotor pole lap position,, bigger torque can be produced for identical magnetomotive force.And the saturated alleviation of the high degree of magnetic of aligned position stator yoke, when the output torque increased, loss reduced.Near aligned position, the action of a magnetic field that is produced by the preceding winding of switching on mutually produces effectively tangential torque hardly on rotor at rotor, and radial pull is very big.Use this kind method and can reduce motor torque ripple effectively, increase motor output torque, reduce the motor power loss simultaneously, improve electric efficiency as the operation working method of motor.
Description of drawings:
With embodiment the utility model is described in further detail in conjunction with the accompanying drawings:
Fig. 1 is 15 ° of schematic diagrames of a step angle of described four phases, 8/6 pole switching reluctance motor.
Fig. 2 is the initial position of rotor P schematic diagram of described four phases, 8/6 pole switching reluctance motor.
Fig. 3 is preceding phase, back phase and the aligned position Q schematic diagram of described four phases, 8/6 pole switching reluctance motor.
Fig. 4 arrives the stator poles center line for the utility model embodiment rotor utmost point and rotor pole center line angle is 6 ° of change of current position schematic diagrames.
Fig. 5 is the photoelectric encoder position installation diagram of described switched reluctance machines.
Fig. 6 is A, the B two-way orthogonal pulses output signal of photoelectric encoder.
Fig. 7 is that the position control of the utility model embodiment is formed.
Fig. 8 is the utility model embodiment four 8/6 pole switching reluctance motor windings exciting voltage waveform mutually.
Fig. 9 for the utility model embodiment four mutually 8/6 pole switching reluctance motors with adopt the two output torque comparison diagrams of method that are conducted a step angle scope.
Figure 10 is the utility model embodiment four phases 8/6 pole switching reluctance motor and the core loss comparison diagram that adopts two methods that are conducted to move.
Specific embodiments
Specify as follows in conjunction with the accompanying drawings:
As shown in Figure 3, P initial position, Q aligned position, 1 preceding phase, 2 back phases.
As shown in Figure 5,3-stator, 4-rotor, 5-winding, 6-motor shaft, 7-photoelectric encoder.
As shown in Figure 1, a step angle of four phases, 8/6 pole switching reluctance rotor is 15 °.Described initial position of rotor P as shown in Figure 2, rotor is from initial position P as shown in Figure 3, preceding phase 1 and back 2 windings mutually switch on simultaneously, rotor is rotated counterclockwise.As rotor adjacent stator rotor pole aligned position Q, winding current by preceding phase 1, provide required power torque by the back single-phase energising of phase 2 stator winding, arrive aligned position Q until rotor and continue to change over to next step angle, repeat above-mentioned the power supply and switch to single-phase winding power supply process by two phase windings.Switch reluctance machine rotor begins to be rotated counterclockwise the excitation process in a week from position P, and each winding energising phase sequence is AB-B-BC-C-CD-D-DA-A-AB.
By preceding phase 1 winding and back mutually 2 windings switch on simultaneously and be adjusted into mutually pass angle of rupture α during the single-phase energising of 2 stator winding of back, be and the corresponding angle of the dimensional parameters of motor that the commuting angle scope is at 10 °～5 °.For this example four phases 8/6 utmost point motor, commuting angle is 9 °, and promptly rotor pole arrival stator poles center line and rotor pole center line angle are 6 ° of position changes of current, as shown in Figure 4.
The rotor position detection of motor adopts 2500 linear light photoelectric coders (the Japanese river of rubbing more, OIH48-2500) 7, photoelectric encoder 7 links to each other with motor shaft 6 with rotor 4, mutually orthogonal A, the B pulse signal of photoelectric encoder 7 output two-way, as shown in Figure 7, with A, B signal feedback reach dsp controller (Texas Instruments, TMS320LF2407) catch pin CAP1/QEP1 and CAP2/QEP2.The built-in quadrature coding pulse circuit of dsp controller can be discerned automatically by the quadrature coding pulse of importing on the external pin number of recording impulse.Motor rotates a circle 360 °, dsp controller detects totally 10000 P-pulses that obtain photoelectric encoder 7 inputs according to last lower edge, controller obtains the particular location of rotor according to the number of pulses of photoelectric encoder 7 outputs, the pulse-width modulation control signal of output logic level type, since the break-make of switching tube in the control switch reluctance motor power circuit, control the conducting switch off time of each phase winding electric current, the composition of the rotor-position control device of motor as shown in Figure 7, comprise command device, dsp controller, power circuit, connect successively, connect motor again, between motor and the dsp controller photoelectric encoder is arranged.Command device and power circuit are general command device and general power circuit.
In the present embodiment, begin to count from initial position, be winding AB energising in the time of 0 °, when locating for 9 ° to be 9 pulses of photoelectric encoder output (10000/360) *, rotor arrival ends A phase winding electric current, when arriving, detection rotor begins to be the energising of C phase winding when 15 ° of positions are 15 pulses of photoelectric encoder output (10000/360) *, when being 24 pulses of photoelectric encoder output (10000/360) *, 24 ° of positions of rotor arrival end the winding current of B phase when detecting, by that analogy.
The winding exciting voltage waveform of respective switch reluctance motor as shown in Figure 8, adopt the be conducted output torque of method of the utility model method and two to contrast as shown in Figure 9, when increasing motor output torque, make torque curve milder, effectively reduce torque pulsation, reduce noise.Contrast with adopting the two switched reluctance machines core loss that are conducted the method operation for the operation of employing the utility model method as shown in figure 10, because employing the utility model method makes the saturated alleviation of high degree of magnetic in the aligned position stator yoke, make core loss reduce, improve electric efficiency.
The utility model is applied to three-phase 6/4 pole switching reluctance motor, and the switched reluctance machines method and the said method of the various numbers of phases such as five phases, 10/8 pole switching reluctance motor, structure are similar.Three-phase 6/4 pole switching reluctance motor step angle is 30 °, and preceding phase stator winding current cut-off scope is in 15 °～5 ° scopes at rotor pole arrival stator poles center line and rotor pole center line angle; Five phases, 10/8 pole switching reluctance motor step angle is 9 °, and preceding phase stator winding current cut-off scope is 3 ° of positions at rotor pole arrival stator poles center line and rotor pole center line angle.
Claims (4)
1, a kind of implement device that is used for the switched reluctance machines operation method is characterized in that this implement device mainly comprises:
Photoelectric encoder is used to detect the rotor-position of motor, and photoelectric encoder links to each other with rotor is coaxial, and what the photoelectric encoder output pulse signal imported dsp controller into catches pin CAP/QEP;
Dsp controller, be used for obtaining the rotor particular location according to the number of pulses of photoelectric encoder output, the pulse-width modulation control signal of output logic level type comes the break-make of switching tube in the control switch reluctance motor power circuit, controls the conducting switch off time of each phase winding electric current.
2, according to the described implement device of claim 1, it is characterized in that described switched reluctance machines is three-phase 6/4 pole switching reluctance motor, describedly be positioned at by preceding phase stator winding electric current place that rotor arrives the stator poles center line and rotor pole center line angle is 15 °～5 ° positions.
3, according to the described implement device of claim 1, it is characterized in that described switched reluctance machines is four 8/6 pole switching reluctance motors mutually, describedly be positioned at by preceding phase stator winding electric current place that rotor arrives the stator poles center line and rotor pole center line angle is 10 °～5 ° positions.
4, according to the described implement device of claim 1, it is characterized in that described switched reluctance machines is five 10/8 pole switching reluctance motors mutually, describedly be positioned at by preceding phase stator winding electric current place that rotor arrives the stator poles center line and rotor pole center line angle is 3 ° of positions.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201429989U CN201315561Y (en) | 2008-11-11 | 2008-11-11 | Device for realizing the running method of switched reluctance motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008201429989U CN201315561Y (en) | 2008-11-11 | 2008-11-11 | Device for realizing the running method of switched reluctance motor |
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| CN201315561Y true CN201315561Y (en) | 2009-09-23 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570759A (en) * | 2011-10-25 | 2012-07-11 | 应光捷 | Three-phase motor |
| CN103684122A (en) * | 2012-09-19 | 2014-03-26 | 比亚迪股份有限公司 | Control method and device for switch reluctance motor |
| CN106464168A (en) * | 2013-12-27 | 2017-02-22 | 法雷奥空气管理英国有限公司 | Switched reluctance motor starting methods |
| CN111614300A (en) * | 2020-06-18 | 2020-09-01 | 中国矿业大学 | Initial position positioning method for four-phase switched reluctance motor without position sensor |
| CN117471183A (en) * | 2023-12-27 | 2024-01-30 | 苏州英磁新能源科技有限公司 | Stator core loss measuring device |
-
2008
- 2008-11-11 CN CNU2008201429989U patent/CN201315561Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570759A (en) * | 2011-10-25 | 2012-07-11 | 应光捷 | Three-phase motor |
| CN102570759B (en) * | 2011-10-25 | 2013-11-20 | 应光捷 | Three-phase motor |
| CN103684122A (en) * | 2012-09-19 | 2014-03-26 | 比亚迪股份有限公司 | Control method and device for switch reluctance motor |
| CN103684122B (en) * | 2012-09-19 | 2017-05-31 | 比亚迪股份有限公司 | The control method and device of switched reluctance machines |
| CN106464168A (en) * | 2013-12-27 | 2017-02-22 | 法雷奥空气管理英国有限公司 | Switched reluctance motor starting methods |
| CN111614300A (en) * | 2020-06-18 | 2020-09-01 | 中国矿业大学 | Initial position positioning method for four-phase switched reluctance motor without position sensor |
| CN111614300B (en) * | 2020-06-18 | 2023-07-04 | 中国矿业大学 | Initial position positioning method for position-sensorless of four-phase switch reluctance motor |
| CN117471183A (en) * | 2023-12-27 | 2024-01-30 | 苏州英磁新能源科技有限公司 | Stator core loss measuring device |
| CN117471183B (en) * | 2023-12-27 | 2024-03-12 | 苏州英磁新能源科技有限公司 | Stator core loss measuring device |
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| Date | Code | Title | Description |
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| 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: 20090923 Termination date: 20111111 |