CN111404293A - Four-phase 8-10 pole double armature winding reluctance motor - Google Patents

Abstract

The invention provides a four-phase 8-10 electrode double-armature winding reluctance motor for supplying power to a load, which is characterized by comprising the following components: a stator having 8 stator poles; a rotor rotatably mounted within the stator having 10 rotor poles; 8 armature windings wound on each stator pole; and 8 excitation windings which are uniformly distributed on the circumference of the stator and are positioned between two adjacent stator poles and are used for enabling magnetic circuits of all phases to be symmetrical, wherein each armature winding comprises a first armature winding and a second armature winding which are vertically arranged, the first armature winding is positioned on the stator pole at a position far away from the rotor, the second armature winding is positioned on the stator pole at a position close to the rotor, and the two armature windings on the two stator poles which are separated by 180-degree mechanical angle are mutually reversely connected in series to form a phase of armature winding.

Description

Four-phase 8-10 pole double armature winding reluctance motor

technical field

The invention belongs to the field of motors and relates to a reluctance motor, in particular to a four-phase 8-10-pole double armature winding reluctance motor.

Background technique

Since the 1990s, with the rapid development of high-performance permanent magnet materials and power electronics technology, reluctance motors have achieved rapid development. Reluctance motors are a type of variable reluctance motors. Variable reluctance motors have unilateral salient poles and There are two types of bilateral salient poles. Because the ratio of the maximum value to the minimum value of the reluctance motor of the double variable salient variable reluctance motor is the largest, the electromechanical energy conversion characteristics are better, and it has a wide range of application prospects in aerospace, wind power generation, and new energy vehicles. .

The biggest feature of the variable reluctance motor is that there is no permanent magnet steel on the motor rotor, and there is no excitation winding. The rotor is made of silicon steel punched sheets, so the structure of the variable reluctance motor is very simple. Reluctance motors are classified according to the number of phases, including single-phase, two-phase or four-phase, three-phase, five-phase and multi-phase reluctance motors. As the number of phases increases, the torque ripple of the motor or the fluctuation of the rectified output voltage decreases. But as the number of phases increases, the structure of the motor will become more complex.

The excitation mode of the reluctance motor is divided into three types: electric excitation mode, permanent magnet excitation mode and hybrid excitation mode. The permanent magnet excitation reluctance motor has the advantages of high power density and high efficiency, but there are also problems such as the inability to adjust the magnetic field. The excitation current of the electric excitation motor is easy to adjust, and the output voltage can be changed by changing the excitation current. However, when the DC excitation device fails, the motor cannot operate normally and the efficiency is low. The excitation magnetic field of the hybrid excitation motor is jointly generated by the permanent magnet and the excitation winding. Compared with the permanent magnet motor, the hybrid excitation motor has the ability to adjust the air gap magnetic field; compared with the electric excitation synchronous motor, it has a smaller armature reaction reactance. Hybrid excitation motors can not only inherit many characteristics of permanent magnet motors, but also have the advantages of adjustable air gap magnetic field and improved motor speed regulation. The excitation of traditional doubly salient electric excitation motors generally adopts centralized excitation, and the excitation windings are wound on the stator poles of multiple doubly salient motors, and there is asymmetry of the phase magnetic circuit, which leads to the loss of the motor armature winding and the loss of the rectifier bridge. uneven distribution.

SUMMARY OF THE INVENTION

In order to solve the above problems, a four-phase 8-10 pole double armature winding reluctance motor is provided to solve the problem of uneven distribution of motor armature winding losses and rectifier bridge losses. The present invention adopts the following technical solutions:

The invention provides a four-phase 8-10-pole double armature winding reluctance motor, which is characterized by comprising: a stator, which has 8 stator poles; a rotor, which is rotatably installed in the stator and has 10 rotor poles; 8 armature windings, wound on each stator pole; and 8 field windings, evenly distributed on the circumference of the stator, between two adjacent stator poles, used to make the magnetic circuit of each phase symmetrical, where , each armature winding includes a first set of armature windings and a second set of armature windings placed up and down, the first set of armature windings is located on the stator pole away from the rotor, and the second set of armature windings is located on the stator pole At the position close to the rotor, two armature windings on two stator poles separated by a mechanical angle of 180 degrees are connected in series in opposite directions to form a one-phase armature winding.

The four-phase 8-10-pole dual armature winding reluctance motor provided by the present invention may also have the feature that the same-named end of the first set of armature windings is connected to the common end, and the other end is connected to the positive end of the rectifier diode , the same-named end of the second armature winding is connected to the positive end of the rectifier diode, and the other end is connected to the common end.

The four-phase 8-10-pole dual-armature winding reluctance motor provided by the present invention may also have the characteristics that the excitation windings are evenly distributed on the circumference of the stator poles, and the stator has a stator yoke, and the stator yoke is located in the phase Between two adjacent stator poles, a permanent magnet is fixedly arranged on the stator yoke portion close to the excitation winding.

The four-phase 8-10-pole double armature winding reluctance motor provided by the present invention may also have the feature that when the excitation winding is not energized, a part of the magnetic flux of the permanent magnet is bypassed by the magnetic shunt, so that the gas passing through the gas is bypassed. The magnetic induction of the gap is reduced,

When the excitation winding is energized in the forward direction, the magnetic resistance of the magnetic circuit increases, the bypass magnetic flux decreases, and most of the magnetic flux generated by the permanent magnet passes through the air gap. By changing the current of the excitation winding, the magnetic flux in the air gap changes. , thereby changing the magnetic field of the air gap.

Invention action and effect

According to the four-phase 8-10-pole double armature winding reluctance motor of the present invention, on the basis of the traditional hybrid excitation reluctance motor, combined with the body characteristics of the reluctance motor, two sets of in-phase reluctance motors are wound around the same stator pole. Armature windings, two sets of windings are placed up and down, two armature windings on two stator poles separated by a mechanical angle of 180 degrees are connected in series to each other to form a one-phase armature winding, and the two sets of armature windings use different rectifiers respectively. The method of the circuit ensures that when the rotor of the motor leaves and slides into the stator pole, the stator pole of this phase supplies power to the load to increase the output power, and there is no electrical connection between the rectifier circuits of the two sets of windings, which increases the fault tolerance of the motor. The excitation winding is centrally wound on each stator pole and evenly distributed around the circumference of the stator, so that the magnetic circuit of each phase is symmetrical, and the torque fluctuation and rectification output voltage fluctuation are reduced. A permanent magnet is placed on the stator yoke of the stator near the excitation winding to form a hybrid excitation reluctance motor with a magnetic shunt. When the electric excitation coil is not energized, part of the magnetic flux of the permanent magnet is bypassed by the magnetic shunt, which reduces the air gap magnetic induction. . After the electric excitation coil passes forward current, the bypass magnetic flux is reduced. The greater the excitation current, the greater the air gap magnetic induction. This structure can obtain a larger adjustment range of the air-gap magnetic field with a smaller change in the excitation magnetomotive force.

Description of drawings

1 is a two-dimensional diagram of a four-phase 8-10 pole double armature winding reluctance motor according to an embodiment of the present invention;

2 is a rectifier circuit diagram of a four-phase 8-10 pole double armature winding reluctance motor according to an embodiment of the present invention;

3 is a simulation diagram of the no-load flux linkage of the first set of armature windings of the four-phase 8-10-pole double armature winding reluctance motor A, B, C, and D four phases according to the embodiment of the present invention;

Fig. 4 is the no-load flux linkage simulation diagram of the two armature windings of the A-phase of the four-phase 8-10-pole double armature winding reluctance motor according to the embodiment of the present invention;

5 is a no-load back EMF simulation diagram of the first set of armature windings of the four-phase 8-10-pole double armature winding reluctance motor A, B, C, and D four phases according to the embodiment of the present invention;

6 is a no-load back EMF simulation diagram of the two armature windings of the A-phase of the four-phase 8-10-pole double armature winding reluctance motor according to the embodiment of the present invention;

7 is a simulation diagram of an unfiltered no-load rectified output voltage of a four-phase 8-10-pole double armature winding reluctance motor according to an embodiment of the present invention.

Detailed ways

The specific embodiments of the present invention will be described below with reference to the accompanying drawings and embodiments.

<Example>

FIG. 1 is a two-dimensional diagram of a four-phase 8-10 pole double armature winding reluctance motor according to an embodiment of the present invention.

As shown in FIG. 1 , this embodiment provides a four-phase 8-10-pole double armature winding reluctance motor 100 for supplying power to a load, including a stator 1 , a rotor 2 , an armature winding 3 , and an excitation winding set 4 , permanent magnet 5 and magnetic shunt 6 .

The stator 1 has a plurality of stator poles 11 and a stator yoke 12 . In this embodiment, the number of stator poles 11 is eight. The eight stator poles 11 correspond to form four phases including A phase, B phase, C phase, and D phase. The stator yoke 12 is located between two adjacent stator poles 11 .

The rotor 2 is rotatably mounted in the stator 1 and has a plurality of rotor poles 21 . In this embodiment, the number of rotor poles is ten.

The armature windings 3 , corresponding to the stator poles 1 , are wound around each stator pole 11 , and include a first set of armature windings 31 and a second set of armature windings 32 placed up and down.

The first set of armature windings 31 is located on the stator pole 11 away from the rotor 2, the second set of armature windings 32 is located on the stator pole 11 close to the rotor 2,

The first set of armature windings 31 and the corresponding second set of armature windings 32 are connected in series in opposite directions to form one-phase armature windings.

The two armature windings 3 on the two stator poles 11 separated by a mechanical angle of 180 degrees are connected in series in opposite directions to each other to form a one-phase armature winding.

In this embodiment, each set of armature windings 3 corresponds to the magnetization power generation mode (ie the rotor pole slides out of the stator pole 11 ) and the demagnetization power generation mode (ie the rotor pole slides into the stator pole 11 ).

2 is a rectifier circuit diagram of a four-phase 8-10 pole double armature winding reluctance motor according to an embodiment of the present invention.

As shown in Figure 2, LA1, LB1, LC1, LD1 are the first set of armature winding inductances of A-phase, B-phase, C-phase, and D-phase respectively; LA2, LB2, LC2, LD2 are A-phase, B-phase, The second set of armature winding inductance of C-phase and D-phase; DA1, DB1, DC1, DD1, DA2, DB2, DC2, DD2 are rectifier circuit diodes; RA1, RB1, RC1, RD1 are A-phase, B-phase, C-phase respectively The first set of armature winding resistance of phase and D-phase; RA2, RB2, RC2, RD2 are the second set of armature winding resistance of A-phase, B-phase, C-phase and D-phase respectively; EA1, EB1, EC1, ED1 respectively is the no-load back EMF of the first set of armature windings of A, B, C, and D phases; The no-load back EMF of the armature winding.

As shown in FIG. 2 , the same-named end of the first set of armature windings 31 of each phase is connected to the common end, and the other end is connected to the positive end of the rectifier diode.

The same-named end of the second set of armature windings 32 of each phase is connected to the positive end of the rectifier diode, and the other end is connected to the common end.

When the rotor pole 21 slides in and out of the stator pole 11, the stator pole 11 of that phase supplies power to the load.

The first set of armature windings 31 of phase A is connected between the positive terminal and the common terminal of diode DA1, the first set of armature windings 31 of phase B is connected between the positive terminal and the common terminal of diode DB1, and the first set of phase C armature windings is connected between the positive terminal and common terminal of diode DB1. The armature winding 31 is connected between the positive terminal and the common terminal of the diode DC1, and the first set of armature windings 31 of the D-phase is connected between the positive terminal and the common terminal of the diode DD1.

The second set of armature windings 32 of phase A is connected between the positive terminal and the common terminal of the diode DA2, the second set of armature windings 32 of phase B is connected between the positive terminal and the common terminal of the diode DB2, and the second set of phase C is connected between the positive terminal and the common terminal of the diode DB2. The armature winding 32 is connected between the positive terminal and the common terminal of the diode DC2, and the second armature winding 32 of the D-phase is connected between the positive terminal and the common terminal of the diode DD2.

When the armature winding 3 is connected with the rectifying device as shown in Figure 2, when the rotor pole slides in and out of the stator pole, the stator pole 11 of this phase can supply power to the load, thereby increasing the output power and reducing the voltage fluctuation rate. At the same time, the fault tolerance of the motor is increased.

The excitation windings 4 are evenly distributed on the circumference of the stator 1 and are located between two adjacent stator poles 11 to make the magnetic circuit of each phase symmetrical, thereby reducing torque ripple and rectified output voltage fluctuation. In this embodiment, the number of excitation windings 4 is eight.

The permanent magnet 5 is fixedly arranged on the stator yoke portion 12 close to the field winding 4, thereby constituting a shunt hybrid excitation reluctance motor.

In this embodiment, the four-phase 8-10-pole double armature winding reluctance motor 100 has eight permanent magnets 5 .

When the excitation winding 4 is not energized, a part of the magnetic flux of the permanent magnet 5 is bypassed through the magnetic shunt 6, so that the magnetic induction through the air gap is reduced,

When the excitation winding is energized in the forward direction, the magnetic resistance of the magnetic circuit increases, the bypass magnetic flux decreases, and most of the magnetic flux generated by the permanent magnet passes through the air gap. By changing the current of the excitation winding, the magnetic flux in the air gap changes. , thereby changing the magnetic field of the air gap.

3 is a simulation diagram of the no-load flux linkage of the first set of armature windings of the four-phase 8-10-pole double armature winding reluctance motor A, B, C, and D according to the embodiment of the present invention.

As shown in Figure 3, this is the waveform of the flux linkage of each phase of the first set of armature windings. From Figure 3, it can be seen that the waveforms of the flux linkages of each phase are symmetrical, indicating that the magnetic circuits of each phase are symmetrical, which can reduce the output voltage fluctuation rate and make the electrical The loss distribution of the armature winding rectifier bridge is uniform.

4 is a simulation diagram of no-load flux linkage of two armature windings of phase A of a four-phase 8-10-pole double armature winding reluctance motor according to an embodiment of the present invention.

As shown in Figure 4, this is the flux linkage waveform of the two sets of armature windings of phase A. Because the two sets of armature windings are placed up and down, the magnitude of the flux linkage at different positions results in different amplitudes of the flux linkage of the two sets of windings.

5 is a simulation diagram of the no-load back EMF of the first set of armature windings of the four-phase 8-10-pole double armature winding reluctance motor A, B, C, and D according to the embodiment of the present invention.

As shown in Figure 5, this is the waveform of the no-load phase voltage of each phase of the first set of armature windings. It can be seen from Figure 5 that the voltage waveforms of each phase are symmetrical, which shows that the magnetic circuit of each phase is symmetrical, which can reduce the output voltage fluctuation rate. Make the motor armature winding and the rectifier bridge loss evenly distributed.

6 is a no-load back EMF simulation diagram of the two armature windings of the A-phase of the four-phase 8-10-pole double armature winding reluctance motor according to the embodiment of the present invention.

As shown in Figure 6, this is the no-load phase voltage waveform of the two sets of A-phase windings. Although the flux linkage amplitudes of the two sets of windings are significantly different, the no-load phase voltage waveforms of the two sets of A-phase windings almost overlap.

7 is a simulation diagram of an unfiltered no-load rectified output voltage of a four-phase 8-10-pole double armature winding reluctance motor according to an embodiment of the present invention.

As shown in FIG. 7 , this is the no-load output voltage without the filter, and it can be seen that the motor voltage fluctuation rate in this embodiment is small.

Example function and effect

The four-phase 8-10-pole double armature winding reluctance motor provided in this embodiment is based on the traditional hybrid excitation reluctance motor and combined with the body characteristics of the reluctance motor. Two sets of in-phase windings are wound around the same stator pole. The two sets of windings are placed up and down, and the two armature windings on the two stator poles separated by a mechanical angle of 180 degrees are connected in series in opposite directions to form a one-phase armature winding. And the two sets of armature windings use different rectifier circuit methods to ensure that when the motor rotor leaves and slides into the stator pole, the stator pole of this phase supplies power to the load to increase the output power, and there is no electrical power between the rectifier circuits of the two sets of windings. contact, increasing the fault tolerance of the motor.

In the four-phase 8-10-pole dual-armature winding reluctance motor provided by this embodiment, the excitation windings are concentratedly wound on each stator pole and evenly distributed around the circumference of the stator, so that the magnetic circuits of each phase are symmetrical, reducing torque fluctuation and Rectified output voltage ripple and other advantages. And a permanent magnet is placed near the stator yoke of the excitation winding to form a hybrid excitation reluctance motor with a magnetic shunt. When the electric excitation coil is not energized, part of the magnetic flux of the permanent magnet is bypassed by the magnetic shunt, which reduces the air gap magnetic induction. . After the electric excitation coil passes forward current, the bypass magnetic flux is reduced. The greater the excitation current, the greater the air gap magnetic induction. This structure can obtain a larger adjustment range of the air-gap magnetic field with a smaller change in the excitation magnetomotive force.

The above embodiments are only used to illustrate specific embodiments of the present invention, and the present invention is not limited to the description scope of the above embodiments.

Claims (4)

1. A four-phase 8-10 pole dual armature winding reluctance machine for supplying power to a load, comprising:

a stator having 8 stator poles;

a rotor rotatably mounted within the stator having 10 rotor poles;

8 armature windings wound on each of the stator poles; and

8 excitation windings which are uniformly distributed on the circumference of the stator and are positioned between two adjacent stator poles for making the magnetic circuits of all phases symmetrical,

wherein each armature winding comprises a first armature winding and a second armature winding which are vertically arranged, the first armature winding is positioned on the stator pole at a position far away from the rotor, the second armature winding is positioned on the stator pole at a position close to the rotor,

the two armature windings on the two stator poles which are separated by 180 degrees mechanical angle are mutually connected in series in an opposite direction to form a one-phase armature winding.

2. A four-phase 8-10 pole dual armature winding reluctance machine according to claim 1 wherein:

wherein the dotted terminal of the first armature winding is connected with the common terminal, the other terminal is connected with the positive terminal of the rectifier diode,

and the dotted terminal of the second armature winding is connected with the positive terminal of the rectifier diode, and the other terminal of the second armature winding is connected with the public terminal.

3. A four-phase 8-10 pole dual armature winding reluctance machine according to claim 1 wherein:

wherein, excitation windings are uniformly distributed on the circumference of the stator pole,

the stator has a stator yoke portion located between adjacent two of the stator poles,

and permanent magnets are fixedly arranged on the stator yoke part close to the excitation winding.

4. A four-phase 8-10 pole dual armature winding reluctance machine according to claim 4 wherein:

wherein when the field winding is not energized, a portion of the magnetic flux of the permanent magnet bypasses the magnetic shunt such that magnetic induction across the air gap is reduced,

when the excitation winding is electrified in the forward direction, the magnetic circuit reluctance is increased, the bypass magnetic flux is reduced, most of the magnetic flux generated by the permanent magnet passes through the air gap, and the magnetic flux of the air gap is changed by changing the current of the excitation winding, so that the magnetic field of the air gap is changed.

Images