CN103715789A - Magnetic suspension switch magnetic resistance complete-period motor - Google Patents

Abstract

The invention discloses a magnetic levitation switch reluctance full-cycle motor. The motor consists of a stator core, a rotor core, 12 equidistant and equal arc width stator poles, 8 equidistant and equal arc width rotor poles, and 3-phase rotation. It is composed of moment suspension winding and 3-phase generator winding. The 3-phase torque suspension windings are stacked on 12 rotor poles, and there are 12 sets of torque suspension windings in total. Each set of torque suspension windings is independently controlled, and 4 sets of torque suspension windings with a difference of 90° form a phase. There are also 12 sets of generator windings, which are divided into 3 phases, and the generator windings of each phase are stacked in series on 4 stator poles with a difference of 90°. The winding structure adopted by the invention is simple, compact and easy to control. The current of the torque levitation winding can not only provide the levitation force and torque, but also act as the excitation current of the power generation winding, and at the same time realize the two modes of electric and power generation of the magnetic levitation switch magneto, and the power generation mode is during the levitation torque excitation and freewheeling valid during the period.

Description

A magnetic levitation switched reluctance full-cycle motor

technical field

The invention belongs to the technical field of motors, and relates to a magnetic levitation switched reluctance full-cycle motor. the

Background technique

At present, 1) The magnetic levitation switched reluctance generator has the function of power generation and self-suspension. After the power generation voltage is rectified, filtered and stabilized, it can output a DC voltage that is basically unaffected when the grid voltage fluctuates or the load changes, which is especially suitable for use It has broad engineering application prospects for momentum compensation, peak regulation and load balancing of photovoltaic power generation and other renewable energy grid-connected operations. 2) So far, the research on maglev switched reluctance motor is mainly based on the traditional 12/8-pole double-winding maglev switched reluctance motor, and it is carried out for its electric running state. For example, Japanese scholars A.Chiba and M.Takemoto have done detailed analysis and research on double-winding magnetic levitation switched reluctance motor. Research on power generation operation is in the early stage of exploration. 3) The suspension winding and torque winding of the traditional magnetic levitation switched reluctance motor are separately stacked on the stator poles, and a set of generating windings is added on this basis, which greatly increases the complexity and cost of the motor. Moreover, the power generation operation mode of the traditional maglev switched reluctance motor is a periodic time-sharing power generation mode, the main winding is excited in the positive torque range, and only outputs electric energy in the negative torque range, and the power density of the power generation is low. the

Contents of the invention

The invention provides a full-cycle motor on the basis of a single-winding magnetic levitation switched reluctance motor. The motor can be in two states of motoring and power generation at the same time, and can generate electricity during the levitation torque excitation period and the freewheeling period, that is, it is a full-cycle motor. The invention improves the working efficiency and power density of the motor. the

The technical solution adopted by the invention is: the motor is composed of a stator core, a rotor core, a stator pole, a rotor pole, a torque suspension winding and a power generation winding. There are no windings on the rotor poles, and there are torque suspension windings and generator windings on the stator poles. The inner wall of the stator core has stator poles of equal distance and equal arc width in the circumferential direction, the number of stator poles is 12, each stator pole is separated by 30°, and the arc width of the stator pole is 16°. The inner wall of the rotor core has rotor poles with equal distance and equal arc width in the circumferential direction, the number of rotors is 8, each rotor pole is separated by 45°, and the rotor pole arc width is 15°. the

As a further improvement of the present invention, the motor has 12 sets of torque suspension windings, which are respectively stacked on 12 stator poles, and each set of torque suspension windings is independently controlled, and 4 sets of torque suspension windings with a difference of 90° constitute a There are three phases in total. Windings N _a1 , N _a2 , N _a3 , and N _a4 constitute the A-phase torque suspension winding, windings N _b1 , N _b2 , N _b3 , and N _b4 constitute the B-phase torque suspension winding, and windings N _c1 , N _c2 , N _c3 , N _c4 constitutes the C-phase torque levitation winding, and each set of windings can simultaneously provide the electric torque force and the levitation force of the rotor levitation.

As a further improvement of the present invention, there are 12 sets of generating windings of the motor, which are divided into 3 phases, and the generating windings of each phase are stacked and wound on 4 stator poles in series at equal intervals. The windings G _a1 , G _a2 , G _a3 , and G _a4 are connected in series to form the A-phase generator winding, the windings G _b1 , G _b2 , G _b3 , and G _b4 are connected in series to form the B-phase generator winding, and the windings G _c1 , G _c2 , G _c3 , G _c4 Connected in series to form a C-phase generator winding.

As a further improvement of the present invention, the winding G _a1 and the winding N _a1 are on the same stator pole, the winding G _a2 and the winding N _a2 are on the same stator pole, and the winding G _a3 and the winding N _a3 are on the same stator pole , winding G _a4 and winding N _a4 are on the same stator pole; winding G _b1 and winding N _b1 are on the same stator pole, winding G _b2 and winding N _b2 are on the same stator pole, winding G _b3 and winding N _b3 On the same stator pole, winding G _b4 and winding N _b4 are on the same stator pole; winding G _c1 and winding N _c1 are on the same stator pole, winding G _c2 and winding N _c2 are on the same stator pole, winding G _c3 and winding N _c3 are on the same stator pole, and winding G _c4 and winding N _c4 are on the same stator pole.

As a further improvement of the present invention, during the rotation of the motor, when part of the stator poles and part of the rotor poles are aligned, the width of the air gap between the aligned stator poles and rotor poles is 0.25 mm. the

Beneficial effects of the present invention:

1. Combining the two sets of torque and suspension windings in the traditional magnetic suspension switched reluctance motor into a set of torque suspension windings. By controlling the torque levitation winding current on the stator pole, the motor can run stably in the state of rotor levitation. The winding structure is simple and compact, reducing the cost. the

2. Lap the generator winding on each stator pole. The generator winding can generate corresponding generating current during the excitation period of the torque suspension winding, and can generate corresponding generating current during the freewheeling period of the torque suspension winding. That is to say, during the excitation and freewheeling period of the torque suspension winding, both can generate electricity, achieving the effect of full-cycle power generation, and greatly improving the efficiency and power density of the motor. the

3. The motor is a switched reluctance full-cycle motor based on the principle of single-winding magnetic levitation. It can be used not only as a motor but also as a generator during operation. It is a magnetically levitated switched reluctance motor integrating electric/power generation. the

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further described:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is when the A-phase torque suspension winding of the present invention is energized, the power generation schematic diagram of the power generation winding;

Fig. 3 is when the motor rotor of the present invention is in different positions, the inductance of the torque suspension winding, the flux linkage, the current schematic diagram of the generating winding;

In the figure: 1. Stator core, 2. Stator pole, 3. Rotor core, 4. Rotor pole, 5. Torque suspension winding, 6. Generator winding, 7. Torque suspension winding inductance, 8. Torque suspension Winding flux linkage, 9. The current size of the torque suspension winding in the conduction interval, 10. The current induced by the generator winding when the torque suspension winding has excitation current, 11. The current induced by the generator winding during the freewheeling period of the torque suspension winding . the

Detailed ways

The present invention is a switched reluctance full-cycle motor based on the principle of single-winding magnetic levitation. As shown in Figure 1, the motor adopts a double salient pole structure with 12 stator poles and 8 rotor poles. , Rotor core 3, rotor pole 4, torque suspension winding 5 and generator winding 6. In the circumferential direction of the inner wall of the stator core 1, stator poles 2 with equidistant arc widths are arranged respectively, each stator pole is separated by 30°, each stator pole arc width is 16°, and the number of stator poles 2 is 12. In the circumferential direction of the inner wall of the rotor core 3, rotor poles 4 with equidistant pole arcs are arranged respectively, each rotor pole is separated by 45°, each rotor pole arc width is 15 ^° , and the number of rotor poles is 8. There is a set of torque levitation windings 5 on each stator pole, which are: N _a1 , N _b1 , N _c1 , N _a2 , N _b2 , N _c2 , N _a3 , N _{b3 , N c3 ,} N _a4 , N _b4 , N _c4 . The windings N _a1 , N _a2 , N _a3 , and N _a4 constitute the A-phase torque suspension winding, the windings N _b1 , N _b2 , N _b3 , and N _b4 constitute the B-phase torque suspension winding, and the windings N _c1 , N _c2 , N _c3 , N _c4 constitutes the C-phase torque suspension winding, a total of 3 phases. There is a set of generator windings on each stator pole, which are: G _a1 , G _b1 , G _c1 , G _a2 , G _b2 , G _c2 , G _a3 , G _b3 , G _c3 , G _a4 , G _b4 , G _c4 . Among them, G _a1 , G _a2 , G _a3 , and G _a4 are connected in series to form the A-phase generator winding, the windings G _b1 , G _b2 , G _b3 , and G _b4 are connected in series to form the B-phase generator winding, and the windings G _c1 , G _c2 , G _c3 , G _c4 Connected in series to form a C-phase generator winding.

As shown in Figure 2, taking phase A as an example, currents i _a1 , i _a2 , i a3 , and i _a4 are respectively applied to the torque levitation windings N _a1 , N _a2 , N _a3 , _and N _a4 , where i _a1 =i _ma1 +i _sa1 , i _a2 =i _ma2 +i _sa2 , i _a3 =i _ma3 +i _sa3 , i _a4 =i _ma4 +i _sa4 . The component i _ma1 of i _a1 is the torque current of the motor of the present invention, which can drive the motor to rotate according to the principle of minimum reluctance. The component i _sa1 of i _a1 is the levitation current for the motor of the present invention to maintain the stable suspension of the rotor. By adjusting the size of _isa1 , i _sa2 , _isa3 and _isa4 , the magnetic levitation effect can be achieved.

As shown in Figure 3, 8 in the figure is a schematic diagram of the internal flux linkage change of the motor, 9 is the current of the A-phase torque suspension winding, θ _on is the current conduction moment of the torque suspension winding, and θ _off is the current shutdown of the torque suspension winding Moments 10 and 11 are the currents generated by the electromagnetic induction of the generator winding. During the energization period of the torque suspension windings N _a1 , _{N a2} , _{N a3} , _{and N a4 ,} the generator winding supplies power to the load. , that is, during the freewheeling period, the generator winding can also supply power to the load, realizing the full-cycle power generation effect, and improving the efficiency and power density of the motor.

This embodiment is a preferred implementation of the present invention, but the invention is not limited to the above-mentioned implementation, without departing from the essence of the present invention, any obvious improvement, replacement or improvement that those skilled in the art can make Modifications all belong to the protection scope of the present invention. the

Claims (5)

1. A magnetic levitation switched reluctance full-cycle motor, characterized in that it consists of a stator core (1), a stator pole (2), a rotor core (3), a rotor pole (4), and a torque suspension winding (5) and generator windings (6); the inner wall of the stator core (1) is provided with 12 stator poles (2) equidistant and equal in arc width, each stator pole is separated by 30°, each stator The pole arc width is 16°; 8 rotor poles (4) with equidistant and equal pole arcs are respectively arranged in the circumferential direction of the inner wall of the rotor core (3), and the distance between each rotor pole is 45°, and the arc width of each rotor pole is 15°; each stator pole (2) has a set of torque levitation windings (5) and a set of generator windings (6). 2. A magnetic levitation switched reluctance full-cycle motor according to claim 1, characterized in that: there are 12 sets of torque levitation windings (5), each of which is independently controlled and wound on 12 stator poles ( 2) Above, 4 sets of torque suspension windings (5) with a difference of 90 ^° constitute a phase, windings N _a1 , N _a2 , N _a3 , and N _a4 constitute phase A torque suspension windings (5), windings N _b1 , N _b2 , N _b3 , N _b4 constitute the B-phase torque suspension winding (5), and the windings N _c1 , N _c2 , N _c3 , and N _c4 constitute the C-phase torque suspension winding (5). 3. A magnetic levitation switched reluctance full-cycle motor according to claim 1, characterized in that: there are 12 sets of the generating windings (5), each of which is independently controlled and divided into 4 sets of 3 phases with a difference of 90° The generator winding (6) is stacked in series on the four stator poles (2) with a difference of 90 ^° to form a phase, and the windings G _a1 , G _a2 , G _a3 , and G _a4 are connected in series to form the A-phase generator winding (6), and the winding G _b1 , G _b2 , G _b3 , G _b4 are connected in series to form a B-phase generator winding (6), and the windings G _c1 , G _c2 , G _c3 , and G _c4 are connected in series to form a C-phase generator winding (6). 4. A magnetic levitation switched reluctance full-cycle motor according to claim 2 or 3, characterized in that: the winding G _a1 and the winding N _a1 are on the same stator pole, and the winding G _a2 and the winding N _a2 are on the same stator pole. On a stator pole, the winding G _a3 and the winding N _a3 are on the same stator pole, the winding G _a4 and the winding N _a4 are on the same stator pole; the winding G _b1 and the winding N _b1 are on the same stator pole, and the winding G _b2 and winding N _b2 are on the same stator pole, winding G _b3 and winding N _b3 are on the same stator pole, winding G _b4 and winding N _b4 are on the same stator pole; the winding G _c1 and winding N _c1 On the same stator pole, winding _Gc2 and winding _Nc2 are on the same stator pole, winding _Gc3 and winding _Nc3 are on the same stator pole, winding _Gc4 and winding _Nc4 are on the same stator pole. 5. A magnetic levitation switched reluctance full-cycle motor according to claim 1, characterized in that: during the rotation of the motor, when part of the stator poles (2) and part of the rotor poles (4) are aligned, the aligned stator poles ( 2) and the air gap width between the rotor pole (4) is 0.25mm.

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