CN101505126A - Power converter for switch reluctance motor - Google Patents
Power converter for switch reluctance motor Download PDFInfo
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- CN101505126A CN101505126A CNA2009100258027A CN200910025802A CN101505126A CN 101505126 A CN101505126 A CN 101505126A CN A2009100258027 A CNA2009100258027 A CN A2009100258027A CN 200910025802 A CN200910025802 A CN 200910025802A CN 101505126 A CN101505126 A CN 101505126A
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- power switch
- switch pipe
- diode
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- power converter
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Abstract
The invention discloses a switched-reluctance-motor power converter with redundancy function. For an n-phase switched reluctance motor, the power converter divides a positive terminal of a power supply bus into n strands, wherein each strand is connected with a fuse wire; the other end of each fuse wire is connected with power topology of an H bridge; and negative terminals of the H bridge are gathered together. The phases of the power converter are mutually independent, and certain phase breaking down can be automatically cut off without affecting the operation of the other phases. During normal operation, the power converter can provide bipolar power so as to reduce the loss of the motor. When a power tube of the certain phase breaks down, the power converter can provide unipolar current so as to improve the system reliability of the switched reluctance motor.
Description
Technical field
The present invention relates to a kind of power inverter, relate in particular to a kind of power inverter of switched reluctance machines.
Background technology
That switched reluctance machines has is simple in structure, firm, reliable operation, control is flexible, operational efficiency is high, fault-tolerant ability is strong, adapts to advantages such as High Temperature And Velocity, has very strong competitiveness at aerospace field.The switched reluctance machines that is applied to aerospace field at present adopts traditional asymmetrical half-bridge topology to carry out the unipolarity power supply mostly, and satisfies the specific (special) requirements that these occasions propose reliability by the method for redundancy backup.This method increased system volume weight, reduced the utilance of system, limited the application of switched reluctance machines in this field.
Summary of the invention
The technical problem to be solved in the present invention is the power inverter that proposes a kind of switched reluctance machines at the defective that prior art exists.
The power inverter of a kind of switched reluctance machines of the present invention, described switched reluctance machines has the n phase winding, n is the natural number greater than 2, it is characterized in that described power inverter comprises n H bridge circuit, n fusible link and bus, each H bridge circuit comprises i.e. first diode to the, four diodes of four diodes, four power switch pipes are first power switch pipe to the, four power switch pipes, the negative pole of bus connects the anode of second diode respectively, the anode of the 4th diode, the source electrode of the source electrode of second power switch pipe and the 4th power switch pipe, the negative electrode of first diode connects the negative electrode of the 3rd diode respectively, connect an end of first fusible link after the drain electrode of the drain electrode of first power switch pipe and the 3rd power switch pipe, another termination bus positive pole of first fusible link, the source electrode of first power switch pipe connects the anode of first diode respectively, the drain electrode of second power switch pipe, one end of first phase winding of the negative electrode of second diode and described switched reluctance machines, the source electrode of the 3rd power switch pipe connects the anode of the 3rd diode respectively, the drain electrode of the 4th power switch pipe, the other end of first phase winding of the negative electrode of the 4th diode and described switched reluctance machines.
Switched reluctance motor system of the present invention adopts the bipolarity method of supplying power to when normal operation, reduce the loss of electric machine; When failure operation, adopt the unipolarity power supply or fault is excised mutually, suitably increase the method for the power output of normal phase, make motor operate in fully loaded or a little less than under the fully loaded situation.This novel method has reduced the loss of system, has improved the reliability of system.
Description of drawings
Fig. 1 is an embodiment motor windings schematic diagram.
Label title among Fig. 1: 1.A1 winding end of incoming cables.2.A1 winding terminal.A1, A2, B1, B2, C1, C2, D1, D2 are respectively the windings of A, B, C, D phase, two windings of every phase in parallel or series connection formation one phase, totally 4 phases.3. stator.4. rotor.
Fig. 2 is the power converter construction schematic diagram.
Label title: V1～V16 is a power switch pipe among Fig. 2, and D1～D16 is a diode.
Fig. 3 is under the motor normal condition, the winding current waveform schematic diagram.
Label title among Fig. 3: the 1. two-phase overlay region of opening.Ia, Ib, Ic, Id are respectively A, B, C, D phase winding current waveform.
Fig. 4 is two overlaids when opening, during short magnetic circuit, and magnetic line of force distribution map in the motor.
Fig. 5 is two overlaids when opening, during long magnetic circuit, and magnetic line of force distribution map in the motor.
Embodiment
As shown in Figure 1.With 8/6 pole switching reluctance motor is that example describes.Winding A1, A2 are in series or in parallel to form the A phase winding, and winding B1, B2 are in series or in parallel to form the B phase winding, and winding C1, C2 are in series or in parallel to form the C phase winding, and winding D1, D2 are in series or in parallel to form the D phase winding.A1～A4, B1～B4 winding adopt the NSNSNSSNSNSNSN mode to connect.
The power inverter of 8/6 pole switching reluctance motor comprises 4 H bridge circuits, 4 fusible links and bus, wherein a H bridge circuit comprises the i.e. first diode D1 to the, the four diode D4 of four diodes, four power switch pipes are the first power switch pipe V1 to the, four power switch pipe V4, the negative pole of bus connects the anode of the second diode D2 respectively, the anode of the 4th diode D4, the source electrode of the source electrode of the second power switch pipe V2 and the 4th power switch pipe V4, the negative electrode of the first diode D1 connects the negative electrode of the 3rd diode D3 respectively, connect an end of first fusible link after the drain electrode of the drain electrode of the first power switch pipe V1 and the 3rd power switch pipe V3, another termination bus positive pole of first fusible link, the source electrode of the first power switch pipe V1 connects the anode of the first diode D1 respectively, the drain electrode of the second power switch pipe V2, the end of the first phase winding A of the negative electrode of the second diode D2 and described switched reluctance machines, the source electrode of the 3rd power switch pipe V3 connects the anode of the 3rd diode D3 respectively, the drain electrode of the 4th power switch pipe V4, the other end of the first phase winding A of the negative electrode of the 4th diode D4 and described switched reluctance machines.
The power inverter topological structure that shown in Figure 2 is in the present embodiment, every phase winding all has independently fusible link protection.During normal the operation,, the bipolarity electric current is provided for each phase winding by H bridge power converter construction.With A is the example explanation mutually, and when a preceding A phase winding was switched on, V1, V4 were open-minded; During shutoff, D2, D3 afterflow.When opening, V2, V3 are open-minded next time; During shutoff, D1, D4 afterflow.Under situation about connecting in motor windings shown in Figure 1, according to power-up sequence shown in Figure 3, preceding Ia, an Ib, Ic, Id feed positive current, and Ia, Ib, Ic, Id feed negative current next time, can guarantee that two-phase opens intervally when overlapping, magnetic line of force path is the shortest in the motor.That is, the two-phase that assurance is opened simultaneously, two teeth that it is adjacent, a tooth is the N utmost point, another tooth is the S utmost point.Become short loop by adjacent two stator tooths and the stator tooth yoke between them, adjacent two rotor tooths and the rotor tooth yoke piece between them like this, can effective less iron loss, as Fig. 4.If adopt the unipolarity power supply, minimum appearance one vice-minister's magnetic circuit commutation of phase weekly.That is, the two-phase of opening simultaneously, its two adjacent stator tooths are the N utmost point or are the S utmost point simultaneously that like this, the magnetic line of force will be along the tooth far away of two-phase stator and the stator yoke between them simultaneously, rotor tooth and rotor yoke constitute long loop, have increased motor iron loss such as Fig. 5.
When following fault appears in switched reluctance motor system,
1. when opening circuit appears in certain power switch pipe or diode, be example with V2 among Fig. 2, constitute similar asymmetrical half-bridge structure by V1, V4, D1, D4 this moment, and winding A unipolarity electric current is provided.Can make motor continue to operate in the nominal load district.
2. short circuit occurs when certain power tube, or during the motor windings short circuit, phase current surpasses the safety value of fusible link rapidly, phase-deficient operation is excised fault in fusible link fusing mutually.Suitably increase the power output of motor normal phase, can make machine operation a little less than the nominal load district.
3. when the motor phase winding opens circuit, phase-deficient operation.Suitably increase the power output of motor normal phase, can make machine operation a little less than the nominal load district.
The present invention all is suitable for all kinds of switched reluctance machines such as 8/6 utmost point, 12/8 utmost points.Only need to be provided with H bridge circuit and the fusible link identical with the switched reluctance machines winding number of phases.
Claims (1)
1. the power inverter of a switched reluctance machines, described switched reluctance machines has the n phase winding, n is the natural number greater than 2, it is characterized in that described power inverter comprises n the H bridge circuit that structure is identical, n fusible link and bus, each H bridge circuit comprises i.e. first diode to the, four diodes of four diodes, four power switch pipes are first power switch pipe to the, four power switch pipes, the negative pole of bus connects the anode of second diode respectively, the anode of the 4th diode, the source electrode of the source electrode of second power switch pipe and the 4th power switch pipe, the negative electrode of first diode connects the negative electrode of the 3rd diode respectively, connect an end of first fusible link after the drain electrode of the drain electrode of first power switch pipe and the 3rd power switch pipe, another termination bus positive pole of first fusible link, the source electrode of first power switch pipe connects the anode of first diode respectively, the drain electrode of second power switch pipe, one end of first phase winding of the negative electrode of second diode and described switched reluctance machines, the source electrode of the 3rd power switch pipe connects the anode of the 3rd diode respectively, the drain electrode of the 4th power switch pipe, the other end of first phase winding of the negative electrode of the 4th diode and described switched reluctance machines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100258027A CN101505126A (en) | 2009-03-10 | 2009-03-10 | Power converter for switch reluctance motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100258027A CN101505126A (en) | 2009-03-10 | 2009-03-10 | Power converter for switch reluctance motor |
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| Publication Number | Publication Date |
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| CN101505126A true CN101505126A (en) | 2009-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2009100258027A Pending CN101505126A (en) | 2009-03-10 | 2009-03-10 | Power converter for switch reluctance motor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2498394A (en) * | 2012-01-16 | 2013-07-17 | Imra Europe Sas | Reluctance machine having DC bias current applied to a stator pole |
| GB2499332A (en) * | 2012-01-16 | 2013-08-14 | Imra Europe Sas | Reluctance motor having stator windings drivable in symmetric or asymmetric connection configuration |
| CN104092343A (en) * | 2014-07-01 | 2014-10-08 | 李佳军 | DC motor with rotary magnetic field |
| CN104579032A (en) * | 2015-01-04 | 2015-04-29 | 东南大学 | Power topological structure controlling three switch reluctance motors at the same time |
| CN104953920A (en) * | 2015-07-07 | 2015-09-30 | 东南大学 | SRM (switched reluctance motor) power topological structure for realizing full-voltage bipolar control |
| WO2015006842A3 (en) * | 2013-07-18 | 2015-10-29 | Whirlpool S.A. | Switched reluctance electric motor |
| CN104092343B (en) * | 2014-07-01 | 2018-02-09 | 李佳军 | A kind of rotating excitation field dc motor |
-
2009
- 2009-03-10 CN CNA2009100258027A patent/CN101505126A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2498394A (en) * | 2012-01-16 | 2013-07-17 | Imra Europe Sas | Reluctance machine having DC bias current applied to a stator pole |
| GB2499332A (en) * | 2012-01-16 | 2013-08-14 | Imra Europe Sas | Reluctance motor having stator windings drivable in symmetric or asymmetric connection configuration |
| GB2498394B (en) * | 2012-01-16 | 2014-01-15 | Imra Europe Sas | Reluctance motors |
| GB2499332B (en) * | 2012-01-16 | 2014-01-15 | Imra Europe Sas | Reluctance motors |
| WO2015006842A3 (en) * | 2013-07-18 | 2015-10-29 | Whirlpool S.A. | Switched reluctance electric motor |
| CN104092343A (en) * | 2014-07-01 | 2014-10-08 | 李佳军 | DC motor with rotary magnetic field |
| CN104092343B (en) * | 2014-07-01 | 2018-02-09 | 李佳军 | A kind of rotating excitation field dc motor |
| CN104579032A (en) * | 2015-01-04 | 2015-04-29 | 东南大学 | Power topological structure controlling three switch reluctance motors at the same time |
| CN104579032B (en) * | 2015-01-04 | 2017-10-20 | 东南大学 | It is a kind of at the same control three switched reluctance machines power topology |
| CN104953920A (en) * | 2015-07-07 | 2015-09-30 | 东南大学 | SRM (switched reluctance motor) power topological structure for realizing full-voltage bipolar control |
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Open date: 20090812 |