CN103633806A - Single-phase transverse flux full-control switched reluctance motor - Google Patents

Abstract

The utility model relates to a single-phase transverse magnetic flux fully-controlled switched reluctance motor, which relates to the field of motors. It is to solve the problems of large output torque fluctuations, low output torque density and inability to output continuous torque of traditional single-phase switched reluctance motors. The present invention has a cylindrical structure. The switched reluctance motor includes a stator, a rotor, and an output shaft of the motor. There is an air gap between the stator and the rotor; the rotor is fixed outside the output shaft of the motor; Windings, front down stator windings, back down stator windings, back up stator windings; the rotor includes permanent magnets, front rotor cores and rear rotor cores, and the permanent magnets are annular permanent magnets; in the present invention, the single-phase switched reluctance motor The output torque fluctuation is reduced by 20%, and the output torque density is increased by 10% year-on-year, which enables the single-phase switched reluctance motor to output continuous torque; at the same time, it reduces the manufacturing process and cost of the switched reluctance motor. The invention is applicable to the field of motors.

Description

Single-phase transverse flux fully controlled switched reluctance motor

technical field

The invention relates to a reluctance motor and belongs to the field of motors.

Background technique

The stator and rotor of the traditional two-phase switched reluctance motor are salient pole structures, and the number of teeth of the stator and rotor cores is equal, and the stator and rotor cores are single-section cores. By sequentially energizing the stator excitation winding, the excitation current of the winding is a unidirectional current, and the stator pole interacts with the rotor pole to generate torque. There are neither windings nor permanent magnets on the rotor, so the structure of the motor is simple and the operation is reliable. However, due to the two-tooth structure of the stator core of the single-phase switched reluctance motor, the rate of change of the inductance of the motor is once within a mechanical angle of 180 degrees in one electrical angle cycle, which makes the output torque of the single-phase switched reluctance motor fluctuate greatly and the output Disadvantages such as low torque density and inability to output continuous torque.

Contents of the invention

The invention aims to solve the problems of large output torque fluctuation, low output torque density and inability to output continuous torque of the traditional single-phase switched reluctance motor, and further provides a single-phase transverse flux fully controlled switched reluctance motor.

Single-phase transverse flux fully controlled switched reluctance motor, which is a cylindrical structure, the switched reluctance motor includes a stator, a rotor and a motor output shaft 4, and an air gap 5 is between the stator and the rotor; the rotor is fixed on The outer side of the motor output shaft 4;

The stator includes a stator core 1, a front ascending stator winding 2, a front descending stator winding 6, a rear descending stator winding 7, and a rear ascending stator winding 9; the stator core 1 is divided into two sections along the axial direction, namely the front and the rear section, the two-section structure is a mirror-image symmetrical structure, wherein two teeth are arranged inside the stator core 1 of the front section, and the two teeth are respectively wound with the uplink stator winding 2 of the front section and the downlink stator winding 6 of the front section; Two teeth are arranged inside the iron core, and the two teeth are respectively wound with the rear section of the downstream stator winding 7 and the rear section of the upward stator winding 9; wherein the upward stator winding 2 and the rear section of the upward stator winding 9 are axially adjacent, and the The front downstream stator winding 6 is axially adjacent to the rear downstream stator winding 7;

The rotor includes a permanent magnet 11, a front rotor core 3 and a rear rotor core 10. The permanent magnet 11 is an annular permanent magnet, and its magnetization direction is axial magnetization. A permanent magnet 11 is clamped; the front rotor core 3 and the rear rotor core 10 are mirror symmetrical structures; the outer surface of the front rotor core 3 is evenly distributed along the circumferential direction and provided with two fan-shaped teeth of the same shape;

The rotor sector tooth arc is 6 degrees larger than the stator tooth arc; the permanent magnet 11 is embedded between the front rotor core 3 and the rear rotor core 10 .

In the present invention, the output torque fluctuation of the single-phase switched reluctance motor is reduced by 20%, and the output torque density is increased by 10% year-on-year, which enables the single-phase switched reluctance motor to output continuous torque; at the same time, the switched reluctance is reduced Motor manufacturing process and cost.

Description of drawings

Fig. 1 is an axial sectional view of the present invention;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the schematic diagram of the magnetic field line path of the magnetic field that permanent magnet produces;

Fig. 4 is a schematic diagram of the magnetic field line path generated after the superposition of the magnetic field generated by the permanent magnet and the magnetic field generated by the winding;

Fig. 5 is a schematic diagram of the direction of the motor winding current;

Figure 6 is a schematic diagram of the direction of the motor winding current;

Fig. 7 is a schematic diagram of the direction of the magnetic field generated by the winding of the stator when the rotor position of the motor is at 90-180 degrees;

Fig. 8 is a magnetic schematic diagram of the rotor position of the motor at 0-90 degrees;

Figure 9 is a schematic diagram of the flow path of the H-bridge current when the rotor position of the motor is 90-180 degrees;

Figure 10 is a schematic diagram of the flow path of the H-bridge current when the motor rotor position is 0-90 degrees;

Fig. 11 is a graph of motor winding current and output torque.

Detailed ways

Specific Embodiment 1: The present embodiment will be described below in conjunction with FIG. 1 and FIG. 2. The single-phase transverse flux full-control switched reluctance motor described in this embodiment has a cylindrical structure, and the switched reluctance motor includes a stator , the rotor and the motor output shaft 4, the air gap 5 is between the stator and the rotor; the rotor is fixed on the outside of the motor output shaft 4;

The stator includes a stator core 1, a front ascending stator winding 2, a front descending stator winding 6, a rear descending stator winding 7, and a rear ascending stator winding 9; the stator core 1 is divided into two sections along the axial direction, namely the front and the rear section, the two-section structure is a mirror-image symmetrical structure, wherein two teeth are arranged inside the stator core 1 of the front section, and the two teeth are respectively wound with the uplink stator winding 2 of the front section and the downlink stator winding 6 of the front section; Two teeth are arranged inside the iron core, and the two teeth are respectively wound with the rear section of the downstream stator winding 7 and the rear section of the upward stator winding 9; wherein the upward stator winding 2 and the rear section of the upward stator winding 9 are axially adjacent, and the The front downstream stator winding 6 is axially adjacent to the rear downstream stator winding 7;

The rotor includes a permanent magnet 11, a front rotor core 3 and a rear rotor core 10, the permanent magnet 11 is an annular permanent magnet, and its magnetization direction is axial magnetization, between the front rotor core 3 and the rear rotor core 10 A permanent magnet 11 is clamped; the front rotor core 3 and the rear rotor core 10 are mirror symmetrical structures; the outer surface of the front rotor core 3 is evenly distributed along the circumferential direction and provided with two fan-shaped teeth of the same shape;

The rotor sector tooth arc is 6 degrees larger than the stator tooth arc; the permanent magnet 11 is embedded between the front rotor core 3 and the rear rotor core 10 .

In this embodiment, the direction of the permanent magnet magnetic circuit is divided into upper and lower directions. As shown in Figure 3, the upper magnetic route is the N pole of the permanent magnet—>the uplink core yoke of the rear rotor—>the uplink core teeth of the rear rotor—>the rear section Stator and rotor upward air gap—>rear stator upward tooth—>rear stator upward yoke—>two-stage stator upward middle yoke—>front stator upward yoke—>front stator upward tooth—>front stator Rotor ascending air gap—>front rotor ascending teeth—>front rotor ascending yoke—>permanent magnet S pole; descending magnetic route permanent magnet N pole—>rear rotor descending core yoke—rear rotor descending core teeth Part—>Rear Stator and Rotor Down Air Gap—>Rear Stator Down Teeth—>Rear Stator Down Yoke—>Two Stator Down Middle Yoke—>Front Stator Down Yoke—>Front Stator Down Teeth Part —> Downward Air Gap of Front Stator and Rotor —> Downward Teeth of Front Rotor —> Downward Yoke of Front Rotor —> S Pole of Permanent Magnet.

The motor windings are single-phase windings, which are connected in series. The winding drive adopts the H-bridge drive excitation mode. The motor rotor position in Figure 1 is set to the mechanical 0-angle position. When the motor rotor angle is 90-180 degrees, the winding excitation is a positive current, and the winding excitation The magnetic circuit of the permanent magnet is consistent with the magnetic circuit directions L-1 and L-2 of the permanent magnet through the directions L-3 and L-4, as shown in Figure 4.

The direction of the excitation current of the motor winding is shown in Figure 5 and Figure 6. When the rotor position of the motor is 90-180 degrees, the excitation current of the winding is a positive current. S pole magnetism; the lower teeth at the front of the stator exhibit N pole magnetism, and the lower teeth at the rear of the stator exhibit S pole magnetism. When the rotor position of the motor is 0-90 degrees, the excitation current of the winding is a negative current, the upper teeth at the front of the stator are S pole magnetic, the upper teeth at the rear of the stator are N pole magnetic; the lower teeth at the front of the stator are S pole magnetic, The lower teeth at the rear of the stator exhibit N-pole magnetism; as shown in Figure 7 and Figure 8.

working principle:

The motor is a two-phase switched reluctance motor, and the electric angle period of the motor stator is 0-180 degrees. The position of the motor rotor in Figure 1 is set as the mechanical 0-degree position. In the range of 0-90 degrees of the motor rotor, the motor winding is driven by the H bridge Circuit, turn on the power tubes S3 and S4, turn off S1 and S2, so that the current of the stator winding of the motor is a negative current, the stator and rotor teeth at the front of the motor are all S magnetic, and the stator and rotor teeth at the rear of the motor are both N magnetic. The teeth of the rotor repel each other, the motor rotor outputs positive torque, and the rotor rotates counterclockwise.

In the range of 90-180 degrees of the motor rotor, the motor winding passes through the H-bridge drive circuit, turns on the power tubes S1 and S2, and turns off S3 and S4, so that the current of the motor stator winding is a positive current, and the upper and lower stator teeth at the front of the motor are shown as N magnetic, the rotor teeth are all S magnetic, the upper and lower stator teeth at the rear of the motor are all S magnetic, the rotor teeth are all N magnetic, the stator and rotor teeth attract each other, the motor rotor outputs positive torque, and the rotor rotates counterclockwise rotate. As shown in Figure 11.

Specific embodiment 2: This embodiment further limits the single-phase transverse flux full-control switched reluctance motor described in specific embodiment 1. Both the downstream stator winding 7 and the rear upstream stator winding 9 are concentrated windings.

In this embodiment, the motor winding drive adopts the H-bridge excitation method. When the motor rotor position is 90-180 degrees, the winding excitation current is a forward current, S1 and S2 are turned on, S3 and S4 are turned off, and the current flow path is shown in the figure 9; when the rotor position of the motor is 0-90 degrees, the excitation current of the winding is a negative current, S3 and S4 are turned on, S1 and S2 are turned off, and the current flow path is shown in Figure 10.

Claims (2)

1. single-phase transverse magnetic flux fully-controlled type switched reluctance machines, is characterized in that: it is cylindrical structure, and described switched reluctance machines comprises stator, rotor and motor output shaft (4), is air gap (5) between described stator and rotor; Rotor is fixed on motor output shaft (4) outside;

Stator comprises stator core (1), the up stator winding of leading portion (2), the descending stator winding of leading portion (6), the descending stator winding of back segment (7), the up stator winding of back segment (9); Described stator core (1) is divided into two sections vertically, be respectively leading portion and back segment, described two-stage structure is mirror image, wherein leading portion stator core (1) inside is provided with two teeth, and described two teeth are wound with respectively the up stator winding of leading portion (2) and the descending stator winding of leading portion (6); Back segment stator core inside is provided with two teeth, and described two teeth are wound with respectively the descending stator winding of back segment (7) and the up stator winding of back segment (9); Wherein up stator winding (2) is axially adjacent with the up stator winding of back segment (9), and the descending stator winding of described leading portion (6) is axially adjacent with the descending stator winding of back segment (7);

Rotor comprises permanent magnet (11), leading portion rotor core (3) and back segment rotor core (10), permanent magnet (11) is annular permanent magnet, its magnetizing direction is for magnetizing vertically, and clamping between described leading portion rotor core (3) and back segment rotor core (10) have a permanent magnet (11); Described leading portion rotor core (3) and back segment rotor core (10) are mirror image; The outer surface of described leading portion rotor core (3) is along the circumferential direction uniformly distributed and is provided with two sectors that shape is identical;

Described rotor sector polar arc is than large 6 degree of stator tooth polar arc; Described permanent magnet (11) is embedded between leading portion rotor core (3) and back segment rotor core (10).

2. single-phase transverse magnetic flux fully-controlled type switched reluctance machines according to claim 1, is characterized in that: the up stator winding of leading portion (2), the descending stator winding of leading portion (6), the descending stator winding of back segment (7) and the up stator winding of back segment (9) are concentrated winding.

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