CN220359009U - Three-phase nine-pole double-sided linear switch reluctance motor - Google Patents

Abstract

The utility model discloses a three-phase nine-pole double-side linear switch reluctance motor. The tooth socket type secondary units are formed by arranging iron teeth on an iron flat plate at equal intervals; the primary unit comprises an upper side unit, a lower side unit and a driving controller; the upper side unit comprises a primary flat plate and nine magnetic poles; the lower unit and the upper unit have the same structure, nine magnetic poles are in one-to-one correspondence with nine magnetic poles of the upper unit to form nine electromagnets, and the magnetism of adjacent electromagnets is opposite; nine electromagnets are divided into three A-phase electromagnets, B-phase electromagnets and C-phase electromagnets, the A-phase electromagnets are opposite to the teeth of the secondary unit, and the B-phase electromagnets and the C-phase electromagnets are staggered by two thirds of the tooth width and are staggered in opposite directions relative to the teeth of the secondary unit; the sensor unit comprises a tooth slot type measured piece and an identification sensor; the identification sensor is used for identifying teeth and grooves of the tooth-groove type measured piece. The utility model has the advantages of realizing non-contact linear driving, along with simple structure, convenient protection and high reliability.

Description

Three-phase nine-pole double-sided linear switch reluctance motor

Technical Field

The utility model relates to the technical field of switched reluctance motors, in particular to a three-phase nine-pole double-sided linear switched reluctance motor.

Background

Switched reluctance motors are different from common reluctance motors, and are novel electromechanical integrated equipment generated by combining a reluctance motor and a power electronic switch circuit. Various types of switched reluctance motor products have been developed at present, and are suitable for the fields of vehicle traction, machine tool driving, aerospace instruments, fan regulation and control, household appliances and the like.

The traditional switch reluctance motor generates rotary motion, and then is converted into linear motion by a mechanical transmission device such as a belt, a ball screw and the like. However, the transmission mode has complex structure, poor reliability and larger volume, noise is inevitably generated in the mechanical transmission process, and the transmission precision and speed are limited due to the inertia and manufacturing errors of the transmission device. As a result of centrifugal forces, for a train driven by a rotating motor, the motor pulls the rollers to rotate on the rails, the adhesion between the rollers and the rails is inversely proportional to the speed of the train, and the traction achieved by the train is determined by the adhesion between the motor pulls the rollers and the rails. As the speed increases, the adhesion of the rollers to the rail decreases and the large air resistance from high speed operation forces the train to need more traction, 400km/h being typically the upper limit of a conventional rotating electric machine train. When the rotating motor drives the train to run, the rotor and the winding are not completely exposed to the air, the heat dissipation area is small, the heat dissipation is slow, and an additional cooling device is needed.

In addition, the lower end of the stator of the traditional switch reluctance motor is directly fixedly connected with the base, the upper end of the stator is suspended, and in the working process of the linear switch reluctance motor, the stator is subjected to larger normal force, so that the structure of the stator is deformed, the movement precision of the linear switch reluctance motor is influenced, even the rotor and the stator are in contact with each other, and the service life of the motor is shortened.

Disclosure of Invention

In order to improve the working efficiency of a linear driving device and a system, reduce the manufacturing cost, improve the system precision and the operation reliability, reduce the noise and improve the operation speed, the utility model provides a three-phase nine-pole double-sided linear switch reluctance motor, which solves the problems that the lower end of a stator is directly fixedly connected with a base, the upper end of the stator is suspended, and the structure of the stator is possibly deformed due to the influence of normal force, and prolongs the service life of the motor.

The technical scheme for realizing the purpose of the utility model is as follows:

a three-phase nine-pole double-sided linear switch reluctance motor comprises a tooth slot type secondary unit, a primary unit and a sensor unit; the tooth slot type secondary unit comprises an iron flat plate and a plurality of iron teeth with equal width, wherein the iron teeth are arranged on the iron flat plate at equal intervals to form teeth and grooves, and the widths of the teeth and the grooves are equal; the primary unit comprises an upper side unit, a lower side unit and a driving controller; the upper unit comprises a primary flat plate and nine magnetic poles; the magnetic pole comprises a polar plate, a winding and a pole shoe, the pole shoe is connected to the primary flat plate through the polar plate, the width of the pole shoe is equal to the tooth width of the secondary unit, and the winding is wound on the polar plate; the lower unit and the upper unit have the same structure, nine magnetic poles of the lower unit and nine magnetic poles of the upper unit are in one-to-one correspondence to form nine electromagnets, and the magnetism of adjacent electromagnets is opposite; the nine electromagnets are divided into three A-phase electromagnets, three B-phase electromagnets and three C-phase electromagnets, pole shoes of the A-phase electromagnets are opposite to teeth of the secondary unit, and the pole shoes of the B-phase electromagnets and the pole shoes of the C-phase electromagnets are staggered by two thirds of tooth widths and opposite in dislocation direction relative to the teeth of the secondary unit; the sensor unit comprises a tooth slot type measured piece and an identification sensor; the tooth slot type measured piece is arranged on the side surface of the secondary unit, and the width of the tooth and the width of the groove are equal to those of the tooth and the groove of the secondary unit and correspond to those of the tooth and the groove of the secondary unit respectively; the identification sensor comprises three probes connected to the drive controller, wherein the three probes are arranged at equal intervals, and the interval of the three probes is two thirds of the tooth width of the secondary unit; the identification sensor is used for identifying teeth and grooves of the tooth-groove type measured piece.

Preferably, the nine electromagnets are arranged from left to right according to the phase A-B-C-A-B-C.

Preferably, the nine electromagnets are arranged from left to right according to the phase A-phase B-phase C-phase A-phase B-phase C.

Preferably, the nine electromagnets are arranged from left to right according to the phase A-B-C-A-B-C-A.

Preferably, the nine electromagnets are arranged from left to right according to the phase A-phase B-phase C-phase.

The utility model has the advantages of realizing non-contact linear driving, along with simple structure, convenient protection and high reliability.

Drawings

Fig. 1 is a schematic diagram of a motor structure.

Fig. 2 is a schematic diagram of a three-dimensional structure of a motor.

Fig. 3 is a schematic diagram of the motor magnetic circuit.

Fig. 4 is a schematic diagram of the motor positioning principle.

Fig. 5a, 5b, 5c and 5d are schematic diagrams of the left-hand principle of the motor.

Fig. 6a, 6b, 6c and 6d are schematic diagrams of the right-hand principle of the motor.

Fig. 7 is a motor layout diagram of the first embodiment.

Fig. 8 is a motor layout diagram of the second embodiment.

Fig. 9 is a motor layout diagram of the third embodiment.

Fig. 10 is a motor layout diagram of the fourth embodiment.

Detailed Description

The utility model relates to the fields of vehicle traction, machine tool driving, aerospace instruments, fan regulation and control, household appliances and the like, and particularly has wide application prospects in the fields of rail transit and goods transportation and article sorting. The device is characterized by easy manufacture and protection, small starting current and large starting torque.

In order to improve the working efficiency of a linear driving device and a system, reduce the manufacturing cost, improve the system precision and the operation reliability, reduce the noise and improve the operation speed, the utility model provides a three-phase nine-pole double-sided linear switch reluctance motor, which solves the problems that the lower end of a stator is directly fixedly connected with a base, the upper end of the stator is suspended, and the structure of the stator is possibly deformed due to the influence of normal force, and prolongs the service life of the motor. The double-sided linear switch reluctance motor comprises a tooth slot type secondary unit, a motor primary unit and a sensor unit. The tooth slot type motor secondary unit comprises an iron flat plate and an iron tooth array, a plurality of teeth with equal width are sequentially arranged on the secondary flat plate to form teeth and grooves, and the widths of the teeth and the grooves are equal. The motor primary unit comprises a primary flat plate, 18 magnetic poles with the same specification and shape and a motor drive controller. The tooth-slot type measured piece in the sensor unit is arranged on the secondary unit side of the motor, the identification sensor is arranged on the primary unit side of the motor, the tooth-slot type measured piece is provided with teeth which are arranged at equal intervals, the lengths of the teeth and the slots are equal, and the length of the teeth of the secondary unit of the motor is equal. The identification sensor is provided with three probes which are arranged at equal intervals, the intervals are two thirds of the length of the magnetic poles, the identification sensor can identify teeth and grooves of the tooth-slot type measured piece, the identified data are transmitted to the motor driving controller, and the motor driving controller controls the on/off and the current magnitude of currents in the 9 electromagnets. The novel structure is characterized by realization of non-contact linear driving, simple structure, convenient protection, small starting current, large torque and high reliability.

Embodiment one:

as shown in fig. 1 and 2, a three-phase nine-pole double-sided linear switched reluctance motor includes a cogged secondary unit 100 (including a ferrous flat plate 101 and a ferrous tooth array 102), a motor primary unit 200, and a sensor unit 300. The motor primary 200 requiring energization and the identification sensor 305 requiring energization (including the probe No. 1 302, the probe No. 2 303, and the probe No. 3 304) are arranged on the motor primary side, and the motor secondary unit 100 requiring no energization and the rack-shaped sheet under test 301 are arranged on the secondary side. The motor primary unit 200 is stationary, the motor secondary unit 100 is moved after receiving electromagnetic force, and the length of the motor secondary unit 100 is equal to the length of the rack-shaped measured piece 301.

The utility model can realize non-contact movement, and all electromagnets in the grouping type electromagnet unit forming the primary of the motor are the same type of electromagnet. As shown in fig. 4, the primary unit of the motor is a double-sided electromagnet, and the double-sided electromagnet is distributed on two sides of the secondary unit, and the specific dimensions are shown in the following table.

Parameter name	Parameter value	Parameter name	Parameter value
				Depth of electromagnet	120mm	Maximum operating current	5A
Groove depth	30mm	Winding (coil) turns	850
				Groove width	30mm	Maximum working gap	5mm
Pole shoe width	30mm	Drive rack tooth width	30mm
				Pole shoe thickness	10mm	Width of driving rack groove	30mm
Width of polar plate	20mm	Copper wire diameter	0.8mm
				Width of iron core	20mm	Position sensing sheet tooth width	30mm
		Position sensing sheet groove width	30mm

The electromagnet is used as a basic unit, 3 electromagnets are used for grouping to form a grouping motor unit, and three motor units are used as the primary of the linear switch reluctance drive motor. Taking the iron tooth array 102 as a reference, defining that two magnetic poles (201, 202) of the No. 1 electromagnet are just opposite to two teeth in the iron tooth array, namely, the teeth are opposite to each other; two magnetic poles (203, 204) of the No. 2 electromagnet are staggered by two-thirds teeth relative to the iron teeth, namely 20mm, and two magnetic poles (205, 206) of the No. 3 electromagnet are staggered by two-thirds teeth relative to the iron teeth, namely 20mm, and the direction of the dislocation of the No. 2 electromagnet is just opposite to that of the dislocation of the No. 2 electromagnet. During the secondary movement of the motor, the corresponding relation between each electromagnet and the iron tooth can be dynamically changed. In fig. 1 and 2, a first grouping motor unit 213, a second grouping motor unit 214, and a third grouping motor unit 215 are shown. Wherein, two poles of the No. 1 electromagnet of the second grouping motor unit 214 are marked as 209, 210, and two poles of the No. 1 electromagnet of the third grouping motor unit 215 are marked as 211, 212. Fig. 1 and 2 also show the primary mounting plate 208.

The driving principle of the present embodiment is explained below.

The identification sensor 305 is in the form of a photoelectric sensor, and three paths of equidistant photoelectric correlation probes (a No. 1 probe 302, a No. 2 probe 303 and a No. 3 probe 304) are configured, as shown in fig. 5a, 5b, 5c and 5d, the interval between adjacent probes is two thirds of the length of an iron tooth, and each probe of the No. 1 probe 302, the No. 2 probe 303 and the No. 3 probe 304 interacts with the rack-shaped measured piece 301, and the rack-shaped measured piece 301 is made of stainless steel, has a tooth width of 30mm, a groove width of 30mm and a thickness of 1.5mm. The probe will generate a high level signal when corresponding to the tooth portion, and a low level signal when corresponding to the slot portion, and the drive controller 207 controls the power on/off and the current level of each electromagnet according to the information uploaded by the identification number 1 probe 302, the identification number 2 probe 303 and the identification number 3 probe 304.

In the case of the initial position shown in fig. 5a, according to the principle of the reluctance motor, if the secondary of the motor is to be fixed, only the electromagnet No. 1 corresponding to the positive relationship needs to be continuously electrified. If the motor secondary is required to walk left, the electromagnet 1 is powered off, at the moment, the part of the probe 1 and the probe 3 corresponding to the tooth-shaped measured piece 301 groove generates a low-level signal, the probe 2 is high-level, and the driving controller 207 is guided to only power the electromagnet 2 meeting the dislocation relation, so that the motor secondary moves left; in the process that the motor secondary continues to move leftwards, the output of the probe No. 1 is changed into a high-level signal, the output of the probe No. 2 is changed into a low-level signal, and the output of the probe No. 3 is still a low-level signal, so that the driving controller 207 is guided to only electrify the electromagnet No. 3 meeting the dislocation relation, and the motor secondary continues to move leftwards as shown in fig. 5 b; in the process that the motor secondary continues to move leftwards, the output of the probe No. 1 is changed into a low-level signal, the output of the probe No. 2 is still changed into a low-level signal, and the output of the probe No. 3 is changed into a high-level signal, so that the driving controller 207 is guided to only electrify the electromagnet No. 1 meeting the dislocation relation, and the motor secondary continues to move leftwards, as shown in fig. 5 c; in the process that the secondary of the motor continues to move left, the output of the probe No. 1 is still a low-level signal, the output of the probe No. 2 is changed into a high-level signal, and the output of the probe No. 3 is changed into a low-level signal, so that the driving controller 207 is guided to only energize the electromagnet No. 2 meeting the dislocation relation, as shown in fig. 5 d; thus, the secondary of the motor can always move leftwards by circularly reciprocating. Fig. 5a, 5b, 5c and 5d show the manner in which the electromagnets of only one grouping motor unit are energized, and the electromagnets of the other two grouping motor units are energized similarly.

If the motor secondary is to walk right in the initial position, the logic mode of the recognition sensor 302 is changed, and if the motor secondary is to be fixed at this time, only the electromagnet 1 conforming to the positive relation needs to be continuously electrified according to the principle of the reluctance motor in the initial position shown in fig. 6 a. If the motor secondary is required to walk to the right, the electromagnet 1 is powered off, at the moment, the part of the probe 1 and the probe 3 corresponding to the tooth-shaped measured piece 301 groove generates a low-level signal, the probe 2 is high-level, and the driving controller 207 is guided to only power on the electromagnet 3 meeting the dislocation relation, so that the motor secondary moves to the right; in the process that the motor secondary continues to move to the right, the output of the probe No. 1 is still a low-level signal, the output of the probe No. 2 is changed into a low-level signal, the output of the probe No. 3 is changed into a high-level signal, and the driving controller 207 is further guided to only electrify the electromagnet No. 2 meeting the dislocation relation, so that the motor secondary continues to move to the right, as shown in fig. 6 b; in the process that the motor secondary continues to move to the right, the output of the probe No. 1 is changed into a high-level signal, the output of the probe No. 2 is still a low-level signal, and the output of the probe No. 3 is changed into a low-level signal, so that the driving controller 207 is guided to only electrify the electromagnet No. 1 meeting the dislocation relation, and the motor secondary continues to move to the right, as shown in fig. 6 c; in the process that the secondary of the motor continues to move to the right, the output of the probe No. 1 is changed into a low-level signal, the output of the probe No. 2 is changed into a high-level signal, the output of the probe No. 3 is still a low-level signal, and the driving controller 207 is guided to only electrify the electromagnet No. 3 meeting the dislocation relation, as shown in fig. 6 d; thus, the secondary of the motor can always move rightwards by circulating and reciprocating. As shown in fig. 6a, 6b, 6c and 6d (only the electromagnet energization pattern of one grouping motor unit is shown, and the electromagnet energization patterns of the other two grouping motor units are the same).

The motor layout diagram of the first embodiment is shown in fig. 7, wherein electromagnets are distributed on two sides of the tooth array, the number 1 electromagnet corresponds to the a-phase winding (a-phase electromagnet), the number 2 electromagnet corresponds to the B-phase winding (B-phase electromagnet), and the number 3 electromagnet corresponds to the C-phase winding (C-phase electromagnet). The electromagnets of the embodiment are sequentially arranged according to the sequence of A-B-C-A-B-C-A-B-C, and the same-phase windings are connected in series, for example, the A-phase winding is connected in series with the A-phase winding, the B-phase winding is connected in series with the B-phase winding, and the C-phase winding is connected in series with the C-phase winding, so that the three-phase nine-pole double-sided linear switch reluctance motor is formed. In the first embodiment, with reference to the No. 1 electromagnet, when the corresponding magnetic pole of the No. 1 electromagnet is opposite to the iron teeth of the iron teeth array, the corresponding magnetic pole of the No. 2 electromagnet is dislocated with the iron teeth by two thirds of the teeth, namely 20mm, and the corresponding magnetic pole of the No. 3 electromagnet is dislocated with the iron teeth by two thirds of the teeth, namely 20mm. According to the principle of the minimum path of magnetic flux, the magnetism of the adjacent electromagnets is opposite, if the magnetism of the side-end electromagnet close to the iron tooth side is N, the magnetism of the electromagnet adjacent to the side-end electromagnet close to the iron tooth side is S, and the magnetism of the electromagnet close to the iron tooth side is N-S-N-S-N-S-N-S-N in sequence. In order to counteract the influence of normal force, the corresponding magnetism of the bilateral electromagnet needs to be opposite, and the electromagnetic ferromagnetism of the other side is S-N-S-N-S-N-S. The arrangement mode of the electromagnets is shortest in the embodiment.

The maximum thrust that can be realized by the linear switch reluctance motor provided by the embodiment is 150N.

Embodiment two:

the motor layout of the second embodiment is shown in fig. 8, and the working principle is the same as that of the first embodiment, except that the electromagnets are arranged in the order of se:Sub>A-se:Sub>A-B-C-se:Sub>A-B-C.

Embodiment III:

the motor layout of the third embodiment is shown in fig. 9, and the working principle is the same as that of the first embodiment, except that the electromagnets are arranged in the order of se:Sub>A-B-C-se:Sub>A-B-C-se:Sub>A.

Embodiment four:

the motor layout of the fourth embodiment is shown in fig. 10, and the working principle is the same as that of the first embodiment, except that the electromagnets are arranged in the order of A-A-B-C.

In the second, third and fourth embodiments, the electromagnets are arranged in different orders, so that the multi-turn coil winding can be satisfied.

The linear switch reluctance motor provided by the utility model has the advantages that the surfaces of the rotor and the stator can be protected by epoxy resin paint and are exposed in the air for working, the heat dissipation performance is good, and the driving (non-contact driving) independent of adhesive force can be realized. If the normal force of the motor is utilized, the weight reduction function can be well realized.

Claims (5)

1. The three-phase nine-pole double-sided linear switch reluctance motor is characterized by comprising a tooth slot type secondary unit (100), a primary unit (200) and a sensor unit (300);

the tooth-socket type secondary unit (100) comprises an iron flat plate (101) and a plurality of iron teeth (102) with equal width, wherein the iron teeth (102) are arranged on the iron flat plate (101) at equal intervals to form teeth and grooves, and the widths of the teeth and the grooves are equal;

the primary unit (200) includes an upper side unit, a lower side unit, and a drive controller (207); the upper unit comprises a primary flat plate and nine magnetic poles; the magnetic pole comprises a polar plate, a winding and a pole shoe, the pole shoe is connected to the primary flat plate through the polar plate, the width of the pole shoe is equal to the tooth width of the secondary unit (100), and the winding is wound on the polar plate; the lower unit and the upper unit have the same structure, nine magnetic poles of the lower unit and nine magnetic poles of the upper unit are in one-to-one correspondence to form nine electromagnets, and the magnetism of adjacent electromagnets is opposite; the nine electromagnets are divided into three A-phase electromagnets, three B-phase electromagnets and three C-phase electromagnets, pole shoes of the A-phase electromagnets are opposite to teeth of the secondary unit, and the pole shoes of the B-phase electromagnets and the pole shoes of the C-phase electromagnets are staggered by two thirds of tooth widths and opposite in dislocation direction relative to the teeth of the secondary unit;

the sensor unit (300) comprises a tooth-slot type measured piece (301) and an identification sensor; the tooth slot type measured piece (301) is arranged on the side surface of the secondary unit (100), and the tooth and the slot of the tooth slot type measured piece are equal to the tooth and the slot width of the secondary unit (100) and correspond to the tooth and the slot width of the secondary unit respectively; the identification sensor comprises three probes connected to the drive controller (207), the three probes being equally spaced apart by two-thirds of the tooth width of the secondary unit (100); the identification sensor is used for identifying teeth and grooves of the tooth-groove type measured piece (301).

2. The three-phase nine-pole double-sided linear switched reluctance motor of claim 1 wherein the nine electromagnets are disposed from left to right in a phase a-B-C.

3. The three-phase nine-pole double-sided linear switched reluctance motor of claim 1 wherein the nine electromagnets are disposed from left to right in a phase a-phase B-phase C-phase a-phase B-phase C-phase.

4. The three-phase nine-pole double-sided linear switched reluctance motor of claim 1 wherein the nine electromagnets are disposed from left to right in a phase a-B-C-a-B-C-a-phase.

5. The three-phase nine-pole double-sided linear switched reluctance motor of claim 1 wherein the nine electromagnets are disposed from left to right in a phase a-phase B-phase C-phase.