CN103532264A - Switched reluctance motor of integral pitch winding - Google Patents

Abstract

The invention discloses a switched reluctance motor with full-pitch windings. The motor has a double salient pole structure. Both the stator and the rotor are provided with salient pole teeth, but the numbers of the salient pole teeth on the stator and rotor are not equal. The distributed full-pitch winding coils are wound on the stator teeth to form a multi-phase symmetrical full-pitch winding structure. The coil is a single-layer coil edge, that is, only one coil edge of the stator winding coil is placed in each stator slot. The self-inductance of each phase winding of the motor The size remains constant and does not change with the rotor position, but the mutual inductance changes periodically with the rotor position, that is, the motor works on the reluctance torque generated by the change of mutual inductance. The invention also introduces the control method of the full-pitch winding switched reluctance motor, which requires at least two-phase windings to be energized at the same time. The structure of the whole-pitch winding switched reluctance motor can improve the material utilization rate of the motor, increase the output torque of the motor and reduce torque ripple.

Description

A full-pitch winding switched reluctance motor

technical field

The invention relates to a switched reluctance motor with full-pitch windings. The invention belongs to the technical field of motor manufacturing and control.

Background technique

With the development of power electronics technology, microelectronics technology and automatic control technology, switched reluctance motors have gradually become a new type of motor that can be applied on a large scale, especially the severe price fluctuations of rare earth permanent magnet materials, making it unnecessary to use permanent magnets. The application of switched reluctance motor is more and more extensive. The traditional switched reluctance motor has a double salient pole structure. The stator and rotor are made of ordinary silicon steel sheets laminated. There is neither permanent magnet nor winding on the rotor. There is a concentrated winding on the stator. The mutual inductance does not change with the change of the rotor position, but The self-inductance will change with the change of the rotor position, and it works according to the principle of "minimum reluctance", that is, the rotor is driven by the reluctance torque generated by the change of self-inductance. Switched reluctance motors have the advantages of simple manufacture, low cost, firm structure, good fault tolerance, easy heat dissipation, and suitable for high-speed operation. competitiveness and broad application prospects.

Several salient pole teeth on the stator of the traditional switched reluctance motor are evenly distributed, the tooth shape and tooth width are exactly the same, and the concentrated winding coils are also uniformly distributed, that is, each stator tooth is covered with a concentrated winding with the same number of turns and the same wire diameter coil. A stator slot is divided into two halves, and two coils belonging to different phases are arranged side by side in the same stator slot. Multi-phase symmetrical windings are evenly distributed along the circumference of the stator, and several coils are connected in series, parallel or series-parallel according to performance requirements to form a one-phase winding. The above-mentioned switched reluctance motor with traditional winding structure adopts a centralized winding structure. Only part of the winding is energized at each moment, and only part of the core directly participates in the conversion of electromagnetic energy. The remaining winding and core materials are idle, so the material utilization rate is low. The switched reluctance motor with concentrated winding work has large torque ripple, which is not conducive to the smooth and stable operation of the motor drive system.

Therefore, starting from solving the above two problems, the present invention proposes a new type of switched reluctance motor using a full-pitch winding structure on the basis of the existing conventional switched reluctance motor structure. By changing the winding structure, the motor's The operation mode improves the utilization rate of motor materials, suppresses the torque ripple of the motor and increases the output torque of the motor.

Contents of the invention

Technical problem: The technical problem to be solved by the present invention is to propose a switched reluctance motor with full-pitch windings. The switched reluctance motor works according to the reluctance torque generated by the change of mutual inductance, which improves the material utilization rate of the motor and is beneficial to suppress The motor torque ripples and increases the output torque, and the structure is suitable for switched reluctance motors with any number of phases and any cogging of the stator and rotor.

Technical scheme: in order to solve the above technical problems, the technical scheme adopted in the present invention is:

The full-pitch winding switched reluctance motor of the present invention includes a stator and a rotor. The stator is provided with an even number of stator teeth, and full-pitch winding coils are wound on the stator teeth. The winding is a single-layer coil structure, that is, each Only one coil side is placed in the stator slot, and the two coil sides of each coil span a complete stator pole pitch. Each phase winding includes several coils, and the coils belonging to one phase winding are connected in series or in parallel or mixed in series and parallel. They are connected to form a single-phase winding, and finally form a multi-phase symmetrical full-pitch winding structure. There are also several salient pole teeth on the rotor, but there are no windings and permanent magnets.

The stator and rotor cores of the electric motor are made of laminated silicon steel sheets, and the complete machine does not need permanent magnets.

Both the stator and the rotor of the electric motor have a salient pole structure, and the rotor is an inner rotor or an outer rotor.

The motor is a rotary motor, or a linear motor or a linear rotary two-degree-of-freedom motor.

The motor is of radial, axial or transverse magnetic field structure.

The salient pole teeth on the stator core of the full-pitch winding switched reluctance motor are evenly distributed along the circumference, and the tooth shape and tooth width of each salient pole tooth are the same. A coil edge is placed in each stator slot.

The winding self-inductance of the full-pitch winding switched reluctance motor is a basically constant constant, which will not change with the change of the rotor position, but the mutual inductance between the windings will change with the change of the rotor position, and the motor relies on the change of the mutual inductance to generate The reluctance torque works, and under the same conditions, the mutual inductance change rate of the full-pitch winding switched reluctance motor will be significantly greater than the self-inductance change rate of the traditional switched reluctance motor of the same size. Therefore, the full-pitch winding switch magnetic The power density of the resistance motor will increase significantly.

The full-pitch winding switched reluctance motor structure can be applied to a switched reluctance motor with any number of phases and any stator and rotor cogging (single-phase 2/2 structure is also possible, that is, a single coil structure, but at this time the motor only has One phase, there is no concept of mutual inductance). Taking the three-phase stator 12-slot/rotor 8-pole switched reluctance motor structure as an example, there are 12 symmetrical salient pole teeth on the stator, correspondingly forming 12 symmetrical stator slots, including the first stator slot, the second stator slot, and the second stator slot. slot, the third stator slot, the fourth stator slot, the fifth stator slot, the sixth stator slot, the seventh stator slot, the eighth stator slot, the ninth stator slot, the tenth stator slot, the eleventh stator slot and the Twelve stator slots; 8 symmetrical salient pole teeth are set on the rotor; a total of 6 distributed full-pitch winding coils are nested on the stator teeth, including the first full-pitch winding coil, the second full-pitch winding coil, and the third full-pitch winding coil. The full-pitch winding coil, the fourth full-pitch winding coil, the fifth full-pitch winding coil and the sixth full-pitch winding coil, wherein: the first full-pitch winding coil and the fourth full-pitch winding coil are diametrically opposite, and the second full-pitch winding coil The coil is diametrically opposite to the coil of the fifth full-pitch winding, and the coil of the third full-pitch winding is diametrically opposite to the coil of the sixth full-pitch winding. One turn side of each full-pitch winding coil is placed in a stator slot and completely occupies the stator slot. The two coil sides of the first full-pitch winding coil are respectively placed in the first stator slot and the fourth stator slot, and the two coil sides of the second full-pitch winding coil are respectively placed in the second stator slot and the fifth stator slot. The two turns of the coils of the three full-pitch windings are respectively placed in the third stator slot and the sixth stator slot, the two turns of the coils of the fourth full-pitch winding are respectively placed in the seventh stator slot and the tenth stator slot, and the fifth full-pitch winding coils are respectively placed in the seventh stator slot and the tenth stator slot. The two coil sides of the distance winding coil are respectively placed in the eighth stator slot and the eleventh stator slot, and the two coil sides of the sixth full-space winding coil are respectively placed in the ninth stator slot and the twelfth stator slot, that is, every The span of each coil is equal to the stator pole pitch, that is, the number of stator teeth spanned by the two coil sides of the coil is equal to the number of motor phases. The first full-pitch winding coil and the fourth full-pitch winding coil are connected in series or in parallel to form an A-phase full-pitch winding, the second full-pitch winding coil and the fifth full-pitch winding coil are connected in series or in parallel to form a B-phase full-pitch winding, and the third full-pitch winding The winding coil and the sixth full-pitch winding coil are connected in series or in parallel to form a C-phase full-pitch winding.

Beneficial effects: compared with the prior art, the present invention has the following beneficial effects:

1. Material utilization rate is greatly improved. The motor of the present invention relies on the reluctance torque produced by the change of mutual inductance to work, which improves the disadvantages of traditional switched reluctance motors that only the iron core near the energized phase winding participates in electromagnetic energy conversion at each moment, and a large amount of iron core materials and winding materials are wasted. The material utilization of the motor is improved.

2. Smaller torque ripple and larger torque. The motor of the present invention adopts a full-pitch winding structure, and at least two phase windings are energized at the same time at each moment, and the mutual inductance change rate of the motor is larger, and torque can be generated in both the rising area and the falling area of the mutual inductance. Therefore, through reasonable control The method can obviously suppress the torque ripple of the motor and improve the output torque of the motor.

3. Suitable for high-speed operation. The motor winding of the invention is arranged on the stator, and the rotor has neither winding nor permanent magnet, and the rotor has small moment of inertia and is suitable for high-speed operation.

4. The structure is simple and reliable. In the motor of the present invention, both the stator and the rotor are formed by pressing silicon steel sheets. The processing is simple, the structure is firm, no permanent magnet is needed, and the material and manufacturing costs are low. In addition, the full-pitch winding coil is a single-layer winding, the winding difficulty is relatively low, and there is no need for phase-to-phase insulation in the slot.

5. The motor can use bipolar power supply. The motor of the present invention relies on changes in mutual inductance to work, at least two-phase windings need to be energized at the same time at any time, and a bipolar energization method can be adopted, which increases the current utilization efficiency of the motor controller.

6. The motor control method is flexible and diverse. There are many power supply methods for the motor, such as unipolar power supply, bipolar square wave power supply or bipolar sine wave power supply.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of a three-phase stator 12-slot/rotor 8-pole switched reluctance motor with a traditional winding structure.

Fig. 2 is a schematic cross-sectional structure diagram of a full-pitch winding switched reluctance motor with a three-phase stator with 12 slots/rotor with 8 poles structure adopted in the embodiment of the present invention.

Fig. 3 is the inductance waveform and several typical driving current waveforms of the full-pitch winding switched reluctance motor according to the embodiment of the present invention, wherein Figs. a, b, c and d are unipolar 120° driving and bipolar 120° driving respectively , bipolar 180° drive and bipolar sine wave drive.

Fig. 4 shows several topological structures of power circuits adopted in the embodiment of the present invention, wherein Figs. a, b, and c respectively represent an asymmetrical half-bridge circuit, an independent three-phase full-bridge circuit, and a three-phase six-tube full-bridge inverter circuit.

In the figure there are: stator 1, full-pitch winding 2, first full-pitch winding coil 2A1, second full-pitch winding coil 2C1, third full-pitch winding coil 2B1, fourth full-pitch winding coil 2A2, fifth full-pitch winding coil 2C2 and sixth full-pitch winding coil 2B2, rotor 3.

Detailed ways

The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

A switched reluctance motor with full-pitch windings of the present invention comprises a stator 1 , full-pitch windings 2 and a rotor 3 . The stator 1 is provided with an even number of stator teeth. Stator slots are formed between adjacent stator teeth, and each stator tooth is opposed to another stator tooth along the radial direction of the stator. The full-pitch winding coil 2 is wound on the stator teeth. The full-pitch winding 2 is a single-layer winding structure, which is nested in the stator slot of the stator 1. Only one coil side is placed in each stator slot, and two coils of a coil The circle side spans a complete stator pole pitch, that is, the number of stator salient pole teeth spanned by the two circle sides of the coil is equal to the number of phases of the motor. Each phase winding is composed of several coils connected in series or parallel or series-parallel hybrid.

Further, both the stator 1 and the rotor 3 are salient pole structures, and the rotor 3 can be an inner rotor or an outer rotor. When the rotor 3 is an inner rotor, the stator 1 is located outside the rotor 3 . When the rotor 3 is an outer rotor, the stator 1 is located inside the rotor 3 . There are no windings and permanent magnets on the rotor 3.

The working mechanism of the whole-pitch winding switched reluctance motor of the present invention follows the principle of minimum reluctance, that is, the magnetic flux always closes along the path of minimum reluctance (maximum permeance). When the center lines of the stator teeth and the rotor teeth do not coincide, that is, when the magnetic permeability is not at the maximum, the magnetic field will generate a magnetic pulling force, forming a reluctance torque, so that the rotor 3 turns to the position where the magnetic permeability is maximum.

As shown in Figure 1, in a three-phase stator 12-slot/rotor 8-pole switched reluctance motor with a traditional winding structure, there are 12 concentrated winding coils on the stator, which are called the first concentrated winding coil to the twelfth in the counterclockwise direction. Concentrated winding coils, wherein: the first concentrated winding coil and the seventh concentrated winding coil are diametrically opposed, the fourth concentrated winding coil is diametrically opposed to the tenth concentrated winding coil, and the above four coils can be sequentially connected in series or parallel or series-parallel hybrid Finally, the A-phase winding is formed; the third concentrated winding coil and the ninth concentrated winding coil are diametrically opposite, the sixth concentrated winding coil and the twelfth concentrated winding coil are diametrically opposed, and the above four coils can be sequentially connected in series or in parallel or mixed in series and parallel. The second concentrated winding coil is diametrically opposed to the eighth concentrated winding coil, the fifth concentrated winding coil is diametrically opposed to the eleventh concentrated winding coil, and the above four coils can be sequentially connected in series or in parallel or in series. The C-phase winding is formed after the parallel connection. The traditional switched reluctance motor uses the change of winding self-inductance to generate reluctance torque to work, and the utilization rate of winding and iron core is low. Under ideal linear conditions, the output torque formula is:

$\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; i</span>}}_{\mathrm{<span\; class="notranslate">\; a</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}\frac{{\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; a</span>}}}{\mathrm{<span\; class="notranslate">\; d\&theta;</span>}}<span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; i</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}\frac{{\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}}{\mathrm{<span\; class="notranslate">\; d\&theta;</span>}}<span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; i</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}\frac{{\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}}{\mathrm{<span\; class="notranslate">\; d\&theta;</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$

Among them, _ia , _ib , and _ic are the phase currents of the three-phase windings of the motor, L _a , L _b , and L _c are the three-phase self-inductance of the motor, and θ is the rotor position.

The winding structure of the whole-pitch winding switched reluctance motor of the present invention is completely different from that of the traditional switched reluctance motor. The traditional switched reluctance motor adopts a concentrated winding structure, and each stator tooth is wound with a concentrated winding coil. The self-inductance of each phase winding of the motor changes with the rotor position, and the mutual inductance is small and basically constant. Therefore, the motor relies on the reluctance torque generated by the change of self-inductance to work. In the switched reluctance motor with full-pitch windings of the present invention, the winding structure is changed from concentrated windings to full-pitch windings, one coil side of the full-pitch winding coil is placed in each stator slot, and two coil sides of a coil cross one of the stators. Pole pitch, that is, a single-layer full-pitch winding structure is formed. The self-inductance of each phase winding of the motor does not change with the change of the rotor position, and basically maintains a constant value. However, the mutual inductance will change significantly with the change of the rotor position. In this way, the motor works on the reluctance torque due to the change of the mutual inductance, and its output The torque formula is:

$\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; i</span>}}_{\mathrm{<span\; class="notranslate">\; a</span>}}{\mathrm{<span\; class="notranslate">\; i</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}\frac{{\mathrm{<span\; class="notranslate">\; D</span>}}_{\mathrm{<span\; class="notranslate">\; ab</span>}}}{\mathrm{<span\; class="notranslate">\; d\&theta;</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; i</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}{\mathrm{<span\; class="notranslate">\; i</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}\frac{{\mathrm{<span\; class="notranslate">\; D</span>}}_{\mathrm{<span\; class="notranslate">\; bc</span>}}}{\mathrm{<span\; class="notranslate">\; d\&theta;</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; i</span>}}_{\mathrm{<span\; class="notranslate">\; a</span>}}{\mathrm{<span\; class="notranslate">\; i</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}\frac{{\mathrm{<span\; class="notranslate">\; D</span>}}_{\mathrm{<span\; class="notranslate">\; ca</span>}}}{\mathrm{<span\; class="notranslate">\; d\&theta;</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$

Among them, i _a , i _b , _ic are the phase currents of the three-phase windings of the motor, Ma _ab , M _bc , M _ca are the mutual inductance among the three-phase windings of the motor, and θ is the rotor position.

The change rate of the mutual inductance of the full-pitch winding switched reluctance motor is larger than that of the traditional switched reluctance motor, and its torque formula does not have a 1/2 term, so its output torque will be greater than that of the traditional switched reluctance motor.

The control mode of the full-pitch winding switched reluctance motor of the present invention is more flexible and diverse, and can be driven by unipolar square wave current, bipolar square wave current, bipolar sine wave current and the like. Moreover, the motor can also pass two-phase currents of opposite polarities in the current drop zone to generate electromagnetic torque, which is beneficial to further increase the output torque of the motor.

The key point of the present invention is that, without changing the structure and size of the stator and rotor core of the motor, only by changing the winding structure, and then changing the operation mode of the motor, the output torque of the motor can be improved, and the torque ripple of the motor can be improved. inhibition.

The present invention can be applied to switched reluctance motors with any combination of phases and stator and rotor cogging poles (single-phase 2/2 structure is also possible, that is, a single coil structure, but at this time the motor has only one phase, and there is no mutual inductance concept). The technical scheme and working principle of the present invention will be specifically described below by taking a three-phase stator 12-slot/rotor 8-pole switched reluctance motor as an example.

As shown in Figure 2, in the three-phase stator 12-slot/rotor 8-pole switched reluctance motor of this embodiment, the stator 1 is provided with 12 uniform and symmetrical stator teeth, thereby forming 12 corresponding stator slots, and the stator is nested There are 6 full-pitch winding coils, which are called in the counterclockwise direction: the first full-pitch winding coil 2A1, the second full-pitch winding coil 2C1, the third full-pitch winding coil 2B1, the fourth full-pitch winding coil 2A2, and the fifth full-pitch winding coil. The full-pitch winding coil 2C2 and the sixth full-pitch winding coil 2B2.

Among them, the first full-pitch winding coil 2A1 is diametrically opposed to the fourth full-pitch winding coil 2A2, and they are sequentially connected in series or in parallel to form the A-phase winding; the third full-pitch winding coil 2B1 is diametrically opposite to the sixth full-pitch winding coil 2B2, sequentially The coils of the second full-pitch winding 2C1 and the coils of the fifth full-pitch winding 2C2 are diametrically opposed to each other in series or in parallel to form the C-phase winding.

The full-pitch winding switched reluctance motor has various control methods, which can be flexibly selected according to different working conditions. Fig. 3 shows several common driving current waveforms that can be applied to the switched reluctance motor with full-pitch windings of the present invention.

Among them, Ma _ab , M _bc and M _ca are the mutual inductances between the three-phase full-pitch windings respectively, and I _a , I _b and I _c are the driving currents in the three-phase full-pitch windings respectively. For the full-pitch winding switched reluctance motor of this embodiment, the number of motor rotor teeth is 8, and the corresponding number of pole pairs is 8, that is, the change period of the winding mutual inductance is 45° mechanical angle, and 45° mechanical angle corresponds to 360° electrical angle.

Figure 3(a) shows the unipolar 120° driving method (the unipolar 120° here does not mean that the actual conduction angle is 120°, but for comparison with the following driving methods. In fact, this This driving mode means that each cycle is turned on for 2/3 of the time). The current period of this driving method is also 45° mechanical angle, and the current is unipolar, there are only two level states greater than zero and equal to zero, and the three-phase current has a phase difference of 15° mechanical angle. An asymmetrical half-bridge circuit as shown in Figure 4(a) can be used.

Figure 3(b) shows the bipolar 120° driving mode. The current cycle of this driving mode is 90° mechanical angle. In each cycle, the forward current is turned on for 1/3 of the time, and the forward current is 1/3 of the time. The reverse current is turned on, and there is no current for 1/3 of the time. The current is bipolar, including three level states greater than zero, equal to zero and less than zero. The three-phase currents have a phase difference of 30° mechanical angle. This driving method can use the independent three-phase full-bridge circuit shown in Figure 4(b) and the three-phase six-tube full-bridge inverter circuit shown in Figure 4(c).

Figure 3(c) shows the bipolar 180° driving mode. The current cycle of this driving mode is also a 90° mechanical angle. In each cycle, the forward current is turned on for 1/2 of the time, and the forward current is 1/2 of the time. The reverse current is turned on for a long time. The current is bipolar, including two level states greater than zero and less than zero. The three-phase current has a phase difference of 30° mechanical angle. This driving method can be used as shown in Figure 4 (b ) shows the independent three-phase full-bridge circuit and the three-phase six-tube full-bridge inverter circuit shown in Figure 4(c).

Figure 3(d) shows the bipolar sine wave driving mode. The current cycle of this driving mode is also a 90° mechanical angle. In each cycle, the current waveform is a standard bipolar sine wave, three-phase current There is a phase difference of 30° mechanical angle respectively. This driving method can adopt the independent three-phase full-bridge circuit shown in Figure 4(b) and the three-phase six-tube full-bridge inverter circuit shown in Figure 4(c).

It should be noted that the typical drive current waveforms mentioned above are only several ideal phase current waveforms, not the only ones, and should not be considered as limitations to the full-pitch winding switched reluctance motor proposed by the present invention, any other similar waveforms Electric current can also drive the motor of the present invention. Moreover, the current waveforms proposed above are all ideal currents, and there will be deviations in actual control.

Figure 4(a) shows the asymmetrical half-bridge power circuit topology suitable for the full-pitch winding switched reluctance motor of the present invention, including an independent and symmetrical three-phase structure, each phase has two switching tubes and two freewheeling diode.

Fig. 4(b) shows the topological structure of an independent three-phase full-bridge power circuit suitable for the whole-pitch winding switched reluctance motor of the present invention, including an independent and symmetrical three-phase structure, and each phase has four switching tubes.

Fig. 4(c) shows the topological structure of the three-phase six-tube full-bridge inverter power circuit suitable for the whole-pitch winding switched reluctance motor of the present invention, including six switching tubes and six freewheeling diodes.

It should be pointed out that when the power circuit with three-phase independent structure shown in Figure 4(a) and Figure 4(b) is used, the independent three-phase winding of the motor can be independently connected to the main circuit. The three-phase windings of the motor are electrically isolated, can operate independently, have strong redundancy and good fault tolerance; and when using the three-phase six-tube full-bridge inverter power circuit shown in Figure 4 (c), it is necessary to separate the independent three-phase windings of the motor Connect them together in a star or delta, and then connect their other ends to the corresponding bridge arms of the main circuit.

The above descriptions are only preferred embodiments of the present invention, and the scope of protection of the present invention is not limited to the above embodiments, but all equivalent modifications or changes made by those of ordinary skill in the art according to the disclosure of the present invention should be included within the scope of protection described in the claims.

Claims (5)

1. One kind whole apart from winding switched reluctance machines, comprise stator (1) and rotor (3), it is characterized in that, described stator (1) is provided with even number stator tooth, and on stator tooth, be wound with whole apart from winding coil (2), this winding is single layer coil structure, be in each stator slot, to be only placed with a coil turn limit, two circle end bays of each coil are crossed a complete stator poles distance, every phase winding comprises several coils, each coil that belongs to a phase winding is sequentially connected or in parallel or string series-parallel connection form a phase winding, the heterogeneous symmetry of final formation is whole apart from winding construction, on rotor (3), also there are several salient pole teeth, but there is no winding and permanent magnet.
2. 2. according to claimed in claim 1, wholely apart from winding switched reluctance machines, it is characterized in that, described electric machine rotor iron core is formed by silicon steel plate stacking, and complete machine does not need permanent magnet.
3. 3. according to claimed in claim 1, wholely apart from winding switched reluctance machines, it is characterized in that, described motor stator (1) and rotor (3) are salient-pole structure, and rotor (3) is internal rotor, or external rotor.
4. 4. according to claimed in claim 1, wholely apart from winding switched reluctance machines, it is characterized in that, described motor is electric rotating machine, or linear electric motors or straight line rotation double freedom motor.
5. 5. according to claimed in claim 1, wholely apart from winding switched reluctance machines, it is characterized in that, described motor is radially, axially or transverse magnetic field structure.

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