CN117526659B - Low-loss switch reluctance motor and control system thereof - Google Patents

Abstract

The invention relates to the technical field of switched reluctance motors and discloses a low-loss switched reluctance motor and a control system thereof, wherein the low-loss switched reluctance motor comprises a machine shell, a plurality of groups of stator modules are fixedly arranged in the machine shell, a rotating shaft is rotatably arranged in the machine shell, a plurality of groups of rotor modules are arranged on the surface of the rotating shaft, and the rotor modules correspond to the stator modules one by one; the rotor modules comprise fixed rotor modules and movable rotor modules; according to the low-loss switch reluctance motor and the control system thereof, through independent design of the stator module and combined design of the fixed rotor module and the movable rotor module in the rotor module, the stator modules and the rotor modules with corresponding groups can be selected according to the running rotating speed and the load torque requirement of the switch reluctance motor, so that the rotating load caused by the rotor modules without working on a rotating shaft can be reduced under the condition that the switch reluctance motor can reach the required running rotating speed and load.

Description

A low-loss switched reluctance motor and its control system

Technical Field

The present invention relates to the technical field of switched reluctance motors, and in particular to a low-loss switched reluctance motor and a control system thereof.

Background technique

The switched reluctance motor is a stepless speed-regulating motor. It is a high-tech optical, mechanical and electrical integrated technology that integrates modern microelectronics technology, digital technology, power electronics technology, infrared optoelectronic technology, and modern electromagnetic theory, design and manufacturing technology.

The switched reluctance motor has the advantage of a wide speed regulation range, but the stator and rotor inside the traditional switched reluctance motor are of integrated design. When the switched reluctance motor is in low speed, high speed, low torque or high torque operating state, the windings inside the stator are in operation, and the rotor as a whole is also in operation. When the switched reluctance motor is in low speed and low torque or high speed and low torque operating state, the overall rotation of the rotor will increase the rotational load of the switched reluctance motor shaft, thereby increasing the energy loss of the switched reluctance motor.

Summary of the invention

In order to solve the problem that the stator and rotor inside the traditional switched reluctance motor are both of an integrated design, when the switched reluctance motor is in a low-speed and low-torque or high-speed and low-torque operating state, the overall rotation of the rotor will increase the rotation load of the switched reluctance motor shaft, thereby increasing the energy loss of the switched reluctance motor, the present invention is implemented through the following technical solutions: a low-loss switched reluctance motor, including a casing, a plurality of groups of stator modules are fixedly installed inside the casing, each group of stator modules exists independently, and the windings in each group of stator modules are separately connected to a power supply, a rotating shaft is rotatably installed inside the casing, and a plurality of groups of rotor modules are installed on the surface of the rotating shaft, and the rotor modules correspond to the stator modules one by one. When the winding inside a certain stator module is connected to the power supply, the stator module drives the corresponding rotor module to rotate;

The plurality of groups of rotor modules include fixed rotor modules and movable rotor modules, wherein the fixed rotor modules are fixedly mounted on the surface of the rotating shaft, and the movable rotor modules are rotatably mounted on the surface of the rotating shaft through bearings;

The movable rotor module can be locked on the surface of the rotating shaft. When the winding inside the stator module corresponding to the movable rotor module is powered on, the movable rotor module and the rotating shaft are in a locked state.

According to the load torque and speed of the switched reluctance motor, the number of stator modules connected to the power supply is selected to drive the corresponding number of rotor modules to drive the shaft to rotate, so that the speed and rotational torque of the shaft meet the requirements, avoiding the use of redundant stator modules to increase energy consumption, and avoiding multiple groups of rotor modules to increase the rotational load of the shaft.

Furthermore, a linkage assembly is provided between the movable rotor module and the rotating shaft, and the movable rotor module and the rotating shaft are placed in a locked state or a relatively rotating state by means of the linkage assembly, and the linkage assembly includes:

A rotating ring, fixedly mounted on the outer ring surface of the bearing and fixedly connected to the movable rotor module;

A linkage disk 1 is axially slidably mounted on the surface of the rotating ring, and push blocks are fixedly mounted on the surface of the linkage disk 1, and the push blocks are distributed in an annular circumferential direction;

The linkage disk 2 is fixedly mounted on the surface of the rotating shaft, and a retractable blocking block is provided on the surface of the linkage disk 2 close to the linkage disk 1. The blocking block is distributed in a circular shape in the circumferential direction, and the blocking block can be matched with the push block.

When the linkage disk 1 and the linkage disk 2 are in a state of separation from each other, the movable rotor module and the rotating shaft are in a relative rotation state. When the linkage disk 1 approaches the linkage disk 2, and the push block cooperates with the blocking block, the movable rotor module and the rotating shaft are in a locked state, and the rotation of the movable rotor module provides driving force for the rotation of the rotating shaft.

At the same time, the push block and the block block are used to cooperate with each other to link the movable rotor module and the rotating shaft, so that the rotation speed of the movable rotor module is the same as the rotation speed of the lower rotating shaft, providing driving force for the rotating shaft, and avoiding large friction loss caused by the large speed difference between the rotating shaft and the movable rotor module when the rotating shaft starts the movable rotor module in the running state. This problem will exist in the clutch of the car.

Furthermore, push blocks are provided in both rotation directions of the linkage disk 1, and blocking blocks are provided in both rotation directions of the linkage disk 2;

When the blocking block in one direction extends out of the surface of the linkage disk 2, the blocking block in the other direction is received inside the linkage disk 2, and the blocking block extending out of the surface of the linkage disk 2 can be matched with the push block in the corresponding rotation direction of the surface of the linkage disk 1.

Push blocks and blocking blocks are respectively arranged in the two rotation directions of the linkage disk 1 and the linkage disk 2, so that the movable rotor module can provide driving force to the rotating shaft in both the forward and reverse directions.

Furthermore, a notch is provided on the surface of the linkage disk 2, a support plate is slidably installed inside the notch, the blocking block is located inside the notch, a telescopic spring is provided between the blocking block and the support plate, and a reset spring is provided between the support plate and the bottom surface of the notch;

The linkage disk 2 is provided with cross-distributed guide grooves inside, and the two cross grooves inside the guide grooves are arc-shaped grooves, and the two cross grooves extend along the two rotation directions of the linkage disk 2, respectively, and the ends of the two cross grooves away from the center of the linkage disk 2 are respectively connected to the notches in the corresponding two directions;

Push balls are placed inside the two cross grooves, and inwardly protruding limiting parts are provided on the outer arcuate edges of the two cross grooves near the intersection points. A limiting plate is rotatably installed on the surface of the limiting part, and the limiting plate can be rotated 90° from the position shown in Figure 13 to the rolling direction of the push ball.

When the shaft rotates, the push ball will tend to roll away from the center of the linkage disk 2 under the action of centrifugal force. The push balls in the cross grooves whose extension distribution direction is opposite to the rotation direction of the shaft will roll along the inner arc edge of the cross groove, push the corresponding limit plate and move to the other end of the cross groove, and push the support plate in the corresponding slot to move toward the outside of the linkage disk 2 under the action of centrifugal force, thereby pushing out the blocking block in the corresponding slot.

The push ball in the other cross groove will be restricted from rolling under the action of the limit part, and the blocking block in the corresponding groove will not extend out of the surface of the linkage disk 2 under the action of the reset spring. Therefore, depending on the rotation direction of the shaft, the blocking block in the corresponding direction will be automatically pushed out of the surface of the linkage disk 2.

Furthermore, the linkage disk 2 is made of magnetic isolation material, the limit plate is made of magnetic absorption material, and the push ball is made of magnetic material. One end of the cross groove close to the center of the linkage disk 2 is provided with magnetic material for resetting the push ball and preventing the push ball from pushing the limit plate away when the linkage disk 2 is not rotating.

The second linkage disk adopts magnetic isolation material to prevent the magnetic field generated by the stator module from affecting the push ball. The push ball is designed with magnetic material, and the limit plate is designed with magnetic absorption material. When the push ball is reset, the limit plate can be reset by utilizing the suction force of the push ball on the limit plate.

Furthermore, an adjustment box is fixedly installed between the two stator modules corresponding to the linkage assembly, a toothed disc is rotatably installed inside the adjustment box, a plurality of arc-shaped adjustment grooves are opened on the side surface of the toothed disc, and the plurality of arc-shaped adjustment grooves are distributed in an annular circumferential direction;

A plurality of fan-shaped magnetic isolation plates are radially slidably installed inside the adjustment box, and guide pillars are provided on the surfaces of the magnetic isolation plates, and the guide pillars are located inside the adjustment slots;

When a plurality of magnetic isolation plates are contacted in sequence, they are combined to form a ring, and the magnetic isolation plates are made of magnetic isolation material.

When the gear disk rotates, the adjustment groove cooperates with the guide column to drive the magnetic isolation plate to slide radially. When multiple magnetic isolation plates are combined to form a circular ring, the stator module on at least one side of the magnetic isolation plate is not connected to the power supply, thereby preventing the magnetic field generated by the stator module connected to the power supply from acting on the rotor module on the other side of the magnetic isolation plate, thereby improving the directional effect of the stator module.

Furthermore, a retractable pressure block is provided on the surface of the rotating ring, and the pressure block is arched. A wedge-shaped rod is axially slidably installed inside the rotating ring. One end of the wedge-shaped rod is fixedly connected to the linkage disk 1, and a compression spring is provided between the other end and the rotating ring. The wedge-shaped end of the wedge-shaped rod corresponds to the pressure block. When the pressure block moves toward the inside of the rotating ring, the pressure block pushes the wedge-shaped rod to move, and the wedge-shaped rod drives the linkage disk 1 to move in a direction away from the linkage disk 2, so that the push block on the surface of the linkage disk 1 is separated from the blocking block on the surface of the linkage disk 2.

The inner ring surface of the magnetic isolation plate is matched with the surface of the rotating ring. When the magnetic isolation plate moves toward the center of the adjusting box, it can contact the pressure block, which can not only improve the magnetic isolation effect, but also push the pressure block to move toward the inside of the rotating ring. The pressure block adopts an arched design, which can enable the rotating ring to be pushed by the magnetic isolation plate when it is rotating forward or reverse.

Furthermore, there are two groups of fixed rotor modules, and the two groups of fixed rotor modules are symmetrically distributed on both sides of the radial center plane of the stator composed of a plurality of stator modules;

When there are an even number of the movable rotor modules, two of the movable rotor modules form a group, and the two movable rotor modules in the same group are symmetrically distributed on both sides of the radial center plane;

When there are an odd number of movable rotor modules, one of the movable rotor modules is grouped together and is mounted on the surface of the rotating shaft with the radial center plane as the symmetry plane, and the remaining movable rotor modules are grouped together in pairs, and the two movable rotor modules in the same group are symmetrically distributed on both sides of the radial center plane;

The connection states of the two movable rotor modules in the same group and the rotating shaft are the same.

The distribution design of the fixed rotor modules and the movable rotor modules can balance the driving force on the shaft surface.

Furthermore, a transmission gear is meshed on the surface of the toothed disc;

A transmission shaft is rotatably installed inside the housing, and the transmission shaft is driven to rotate by a micromotor. The transmission gear is located on the surface of the transmission shaft, and a key slot is provided on the surface of the transmission shaft. A clamping block is radially slidably installed on the inner ring surface of the transmission gear, and the clamping block can cooperate with the key slot. The clamping block is driven by an electromagnetic block, and the electromagnetic block is installed inside the transmission gear on the side of the clamping block away from the key slot. When the electromagnetic block is powered on, it can generate magnetic force on the clamping block. When the clamping block cooperates with the key slot, the transmission gear and the transmission shaft rotate synchronously. When the clamping block is separated from the key slot, the transmission gear does not rotate with the transmission shaft.

A low-loss switched reluctance motor control system, the SRD system comprising:

The speed and torque setting identification module is used to set the operating speed and load torque of the switched reluctance motor, and is also used to identify and obtain the operating speed and load torque of the switched reluctance motor;

A power control module, the power control module comprising a stator winding circuit control module and an electromagnetic block power connection control module;

The stator winding circuit control module is used to connect power to the winding in the corresponding stator module according to the operating speed and load torque of the switched reluctance motor set by the speed torque setting identification module;

The electromagnetic block power supply control module is used to connect the power supply to the corresponding electromagnetic block according to the operating speed and load torque of the switched reluctance motor set by the speed torque setting identification module.

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

1. The low-loss switched reluctance motor and its control system, through the independent design of the stator module and the combined design of the fixed rotor module and the movable rotor module in the rotor module, can select the corresponding number of stator modules and rotor modules according to the operating speed and load torque requirements of the switched reluctance motor, so that the switched reluctance motor can achieve the required operating speed and load, while reducing the rotational load on the rotating shaft caused by the unfinished rotor module, thereby reducing the overall energy consumption of the switched reluctance motor.

2. The low-loss switched reluctance motor and its control system can realize the forward and reverse linkage locking between the movable rotor module and the rotating shaft through the design of the bidirectional push block on the surface of the linkage disk 1 and the bidirectional blocking block on the surface of the linkage disk 2 in the linkage assembly, as well as the combined design of the cross groove, limit part, limit plate and push ball of the internal guide groove of the linkage disk 2 and the support plate and blocking block. At the same time, according to the different rotation directions of the rotating shaft, the blocking block in the corresponding direction can be automatically pushed out of the linkage disk 2, so as to realize the coordination between the push block in the corresponding direction on the surface of the linkage disk and the corresponding blocking block.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a perspective view of the structure of a switched reluctance motor according to the present invention;

FIG2 is a perspective view of the first structure of the rotor module and the rotating shaft in accordance with the present invention;

FIG3 is a perspective view of the linkage assembly structure of the present invention;

FIG4 is a perspective view of the stator module and the rotor module matching structure of the present invention;

FIG5 is a three-dimensional diagram of the coordination structure of the stator module, the adjustment box, and the rotor module of the present invention;

FIG6 is a perspective view of the matching structure of the toothed disc and the magnetic isolation plate of the present invention;

FIG7 is a second perspective view of the coordination structure of the stator module and the rotor module of the present invention;

FIG8 is a front view of the internal structure of the linkage assembly and the adjustment box of the present invention;

FIG9 is a schematic diagram of the structure of point A in FIG8 of the present invention;

FIG10 is a perspective view of a structure of a linkage disk according to the present invention;

FIG11 is a perspective view of the second structure of the linkage disk of the present invention;

FIG12 is a schematic diagram of the internal structure of the linkage disk 2 of the present invention;

FIG13 is a schematic diagram of the structure of point B in FIG12 of the present invention;

FIG14 is a schematic diagram of a partial cross-sectional structure of the interior of the linkage disk 2 of the present invention;

FIG15 is a schematic diagram of the internal structure of the transmission shaft and transmission gear of the present invention;

FIG16 is a second perspective view of the matching structure of the rotor module and the rotating shaft of the present invention;

FIG. 17 is a flow chart of the switched reluctance motor control system of the present invention.

In the figure: 1, casing; 2, stator module; 3, fixed rotor module; 31, movable rotor module; 4, rotating shaft; 5, bearing; 6, swivel; 61, pressure block; 62, wedge rod; 7, linkage disk 1; 71, push block; 8, linkage disk 2; 81, notch; 811, block; 812, support plate; 82, guide groove; 821, push ball; 822, limit part; 823, limit plate; 9, adjustment box; 91, toothed disk; 911, adjustment groove; 92, magnetic isolation plate; 10, transmission shaft; 11, transmission gear; 111, block.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

The embodiments of the low-loss switched reluctance motor and its control system are as follows:

Please refer to Figures 1 to 16, a low-loss switched reluctance motor includes a casing 1, a plurality of groups of stator modules 2 are fixedly installed inside the casing 1, each group of stator modules 2 exists independently, and the windings in each group of stator modules 2 are individually connected to a power source. A rotating shaft 4 is rotatably installed inside the casing 1, and a plurality of groups of rotor modules are installed on the surface of the rotating shaft 4. The rotor modules correspond to the stator modules 2 one by one. When the winding inside a certain stator module 2 is connected to the power source, the stator module 2 drives the corresponding rotor module to rotate.

The plurality of groups of rotor modules include a fixed rotor module 3 and a movable rotor module 31 . The fixed rotor module 3 is fixedly mounted on the surface of the rotating shaft 4 , and the movable rotor module 31 is rotatably mounted on the surface of the rotating shaft 4 via a bearing 5 .

The movable rotor module 31 can be locked on the surface of the rotating shaft 4 . When the winding inside the stator module 2 corresponding to the movable rotor module 31 is powered on, the movable rotor module 31 and the rotating shaft 4 are in a locked state.

According to the load torque and speed of the switched reluctance motor, the number of groups of stator modules 2 connected to the power supply is selected to drive the corresponding number of rotor modules to drive the shaft 4 to rotate, so that the speed and rotational torque of the shaft 4 meet the requirements, avoiding the use of redundant stator modules 2 to increase energy consumption, and avoiding multiple groups of rotor modules to increase the rotational load of the shaft 4.

A linkage assembly is provided between the movable rotor module 31 and the rotating shaft 4, and the linkage assembly is utilized to put the movable rotor module 31 and the rotating shaft 4 in a locked state or a relative rotation state. The linkage assembly comprises a swivel 6, a linkage disk 1 7, and a linkage disk 2 8; the swivel 6 is fixedly mounted on the outer ring surface of the bearing 5, and is fixedly connected to the movable rotor module 31; the linkage disk 1 7 is axially slidably mounted on the surface of the swivel 6, and a push block 71 is fixedly mounted on the surface of the linkage disk 1 7, and the push block 71 is distributed in a ring-shaped circumferential direction.

The linkage disk 2 8 is fixedly mounted on the surface of the rotating shaft 4 . A retractable blocking block 811 is provided on the surface of the linkage disk 2 8 close to the linkage disk 1 7 . The blocking block 811 is distributed in a circular shape in the circumferential direction and can be matched with the push block 71 .

When the linkage disk 1 7 and the linkage disk 2 8 are in a state of separation from each other, the movable rotor module 31 and the rotating shaft 4 are in a relative rotation state. When the linkage disk 1 7 approaches the linkage disk 2 8, and the push block 71 cooperates with the blocking block 811, the movable rotor module 31 and the rotating shaft 4 are in a locked state. The rotation of the movable rotor module 31 provides driving force for the rotation of the rotating shaft 4.

Push blocks 71 are provided in both rotation directions of the linkage disk 1 7, and blocking blocks 811 are provided in both rotation directions of the linkage disk 2 8; when the blocking block 811 in one direction extends out from the surface of the linkage disk 2 8, the blocking block 811 in the other direction is received inside the linkage disk 2 8, and the blocking block 811 extending out from the surface of the linkage disk 2 8 can be matched with the push block 71 in the corresponding rotation direction of the surface of the linkage disk 1 7.

The two rotation directions of the linkage disk 1 7 and the linkage disk 2 8 are respectively provided with a push block 71 and a blocking block 811, so that the movable rotor module 31 can provide driving force to the rotating shaft 4 in both the forward and reverse directions.

At the same time, the push block 71 and the blocking block 811 are used in conjunction with each other to realize the linkage between the movable rotor module 31 and the rotating shaft 4. When the rotation speed of the movable rotor module 31 is the same as the rotation speed of the lower rotating shaft 4, a driving force is provided for the rotating shaft 4 to avoid large friction loss caused by the large speed difference between the rotating shaft 4 and the movable rotor module 31 when the rotating shaft 4 starts the movable rotor module 31 in the running state. This problem will exist in the clutch of the car.

A slot 81 is provided on the surface of the linkage disk 2 8, a support plate 812 is slidably installed inside the slot 81, a blocking block 811 is located inside the slot 81, a telescopic spring is provided between the blocking block 811 and the support plate 812, and a return spring is provided between the support plate 812 and the bottom surface of the slot 81.

The linkage disk 2 8 has two cross grooves 82 inside, and the two cross grooves 82 are arc grooves. The two cross grooves extend along the two rotation directions of the linkage disk 2 8 respectively. The ends of the two cross grooves away from the center of the linkage disk 2 8 are connected to the corresponding notches 81 in the two directions.

Push balls 821 are placed inside the two cross grooves, and an inwardly protruding limit portion 822 is provided on the outer arcuate edges of the two cross grooves near the intersection point. A limit plate 823 is rotatably installed on the surface of the limit portion 822, and the limit plate 823 can be rotated 90° from the position shown in Figure 13 to the rolling direction of the push ball 821.

When the shaft 4 rotates, the push ball 821 will tend to roll away from the center of the linkage disk 2 8 under the action of centrifugal force. The push balls 821 in the two cross grooves whose extension distribution direction is opposite to the rotation direction of the shaft 4 will roll along the inner arc edge of the cross groove, and push the corresponding limit plate 823 to move to the other end of the cross groove, and push the support plate 812 in the corresponding slot 81 to move toward the outside of the linkage disk 2 8 under the action of centrifugal force, thereby pushing out the blocking block 811 in the corresponding slot 81.

The push ball 821 in the other cross groove will be restricted from rolling under the action of the limit portion 822, and the blocking block 811 in the corresponding slot 81 will not extend out of the surface of the linkage disk 2 8 under the action of the reset spring. Therefore, depending on the rotation direction of the rotating shaft 4, the blocking block 811 in the corresponding direction will be automatically pushed out of the surface of the linkage disk 2 8.

The linkage disk 2 8 is made of magnetic isolation material, the limit plate 823 is made of magnetic absorption material, and the push ball 821 is made of magnetic material. Magnetic material is provided at one end of the cross groove close to the center of the linkage disk 2 8 to reset the push ball 821 and prevent the push ball 821 from pushing the limit plate 823 away when the linkage disk 2 8 is not rotating.

The linkage disk 2 8 is made of magnetic isolation material to prevent the magnetic field generated by the stator module 2 from affecting the push ball 821. The push ball 821 is designed with magnetic material, and the limit plate 823 is designed with magnetic absorption material. When the push ball 821 is reset, the limit plate 823 can be reset by using the suction force of the push ball 821 on the limit plate 823.

An adjustment box 9 is fixedly installed between the two stator modules 2 corresponding to the linkage assembly, and a gear disk 91 is rotatably installed inside the adjustment box 9. The side surface of the gear disk 91 is provided with a plurality of arc-shaped adjustment grooves 911, and the plurality of arc-shaped adjustment grooves 911 are distributed in a circular circumferential direction; a plurality of fan-shaped magnetic isolation plates 92 are radially slidably installed inside the adjustment box 9, and a guide column is provided on the surface of the magnetic isolation plate 92, and the guide column is located inside the adjustment groove 911.

When multiple magnetic isolation plates 92 are in contact with each other in sequence, they are combined to form a ring. The magnetic isolation plates 92 are made of magnetic isolation material. When the toothed disc 91 rotates, the adjustment groove 911 cooperates with the guide column to drive the magnetic isolation plates 92 to slide radially. When multiple magnetic isolation plates 92 are combined to form a ring, at least one side of the magnetic isolation plate 92 is not connected to the power supply, thereby preventing the magnetic field generated by the stator module 2 connected to the power supply from acting on the rotor module on the other side of the magnetic isolation plate 92, thereby improving the directional effect of the stator module 2.

A retractable pressure block 61 is provided on the surface of the swivel 6. The pressure block 61 is arched. A wedge rod 62 is axially slidably installed inside the swivel 6. One end of the wedge rod 62 is fixedly connected to the linkage disk 7, and a compression spring is provided between the other end and the swivel 6. The wedge-shaped end of the wedge rod 62 corresponds to the pressure block 61. When the pressure block 61 moves toward the inside of the swivel 6, the pressure block 61 pushes the wedge rod 62 to move, and the wedge rod 62 drives the linkage disk 7 to move away from the linkage disk 2 8, so that the push block 71 on the surface of the linkage disk 7 is separated from the blocking block 811 on the surface of the linkage disk 2 8.

The inner ring surface of the magnetic isolation plate 92 is matched with the surface of the rotating ring 6. When the magnetic isolation plate 92 moves toward the center of the adjusting box 9, it can contact the pressure block 61, which can not only improve the magnetic isolation effect, but also push the pressure block 61 to move toward the inside of the rotating ring 6. The pressure block 61 adopts an arched design, which can make the rotating ring 6 be pushed by the magnetic isolation plate 92 when it is rotating forward or reverse.

There are two groups of fixed rotor modules 3, and the two groups of fixed rotor modules 3 are symmetrically distributed on both sides of the radial center plane of the stator composed of a plurality of stator modules 2; when there are an even number of movable rotor modules 31, two movable rotor modules 31 form a group, and the two movable rotor modules 31 in the same group are symmetrically distributed on both sides of the radial center plane.

When there are an odd number of movable rotor modules 31, one of the movable rotor modules 31 forms a group and is installed on the surface of the rotating shaft 4 with the radial center plane as the symmetry plane, and the remaining movable rotor modules 31 form a group of two, and the two movable rotor modules 31 in the same group are symmetrically distributed on both sides of the radial center plane; the connection status of the two movable rotor modules 31 in the same group with the rotating shaft 4 is the same, and the distribution design of the fixed rotor module 3 and the movable rotor module 31 can balance the driving force on the surface of the rotating shaft 4.

A transmission gear 11 is meshed on the surface of the toothed disk 91; a transmission shaft 10 is rotatably installed inside the housing 1, and the transmission shaft 10 is driven to rotate by a micromotor. The transmission gear 11 is located on the surface of the transmission shaft 10, and a key slot is provided on the surface of the transmission shaft 10. A clamping block 111 is radially slidably installed on the inner ring surface of the transmission gear 11, and the clamping block 111 can cooperate with the key slot. The clamping block 111 is driven by an electromagnetic block, and the electromagnetic block is installed inside the transmission gear 11 on the side of the clamping block 111 away from the key slot. When the electromagnetic block is powered on, it can generate magnetic force on the clamping block 111. When the clamping block 111 cooperates with the key slot, the transmission gear 11 and the transmission shaft 10 rotate synchronously. When the clamping block 111 is separated from the key slot, the transmission gear 11 does not rotate with the transmission shaft 10.

Please refer to Figure 17, a low-loss switched reluctance motor control system, the SRD system includes a speed torque setting identification module and a power control module; the speed torque setting identification module is used to set the operating speed and load torque of the switched reluctance motor, and is also used to identify and obtain the speed and load torque of the switched reluctance motor.

The power control module includes a stator winding circuit control module and an electromagnetic block power-on control module; the stator winding circuit control module is used to connect the power to the winding in the corresponding stator module 2 according to the operating speed and load torque of the switched reluctance motor set by the speed torque setting identification module; the electromagnetic block power-on control module is used to connect the power to the corresponding electromagnetic block according to the operating speed and load torque of the switched reluctance motor set by the speed torque setting identification module.

Working principle of low-loss switched reluctance motor:

When using the switched reluctance motor, the number of groups of stator modules 2 connected to the power supply is selected according to the load torque and rotation speed of the switched reluctance motor, so as to drive the corresponding number of rotor modules to drive the rotating shaft 4 to rotate, so that the rotation speed and rotation torque of the rotating shaft 4 meet the requirements. After the corresponding rotor module is determined, the micromotor is started to drive the transmission shaft 10 to rotate, and the electromagnetic block inside the corresponding transmission gear 11 is powered on. The electromagnetic block is used to make the clamping block 111 cooperate with the keyway on the surface of the transmission shaft 10. At this time, the rotation of the transmission shaft 10 will drive the corresponding transmission gear 11 to rotate.

The transmission gear 11 meshes with the toothed disc 91, driving the toothed disc 91 to rotate. When the toothed disc 91 rotates, the adjustment groove 911 cooperates with the guide column to drive the magnetic isolation plate 92 to slide radially. When the magnetic isolation plate 92 is separated from the rotating ring 6, under the action of the compression spring at one end of the wedge rod 62, the linkage disc 1 7 moves toward the direction of the linkage disc 2 8. When the movable rotor module 31 rotates, the push block 71 on the surface of the linkage disc 1 7 cooperates with the blocking block 811 on the surface of the linkage disc 2 8 to drive the rotating shaft 4 to rotate.

When the switched reluctance motor is in operation and the number of movable rotor modules 31 needs to be increased, the above-mentioned method is used to move the linkage disk 1 7 toward the direction of the linkage disk 2 8. When the rotation speed of the increased movable rotor module 31 reaches the rotation speed of the lower shaft 4, the push block 71 on the surface of the linkage disk 1 7 cooperates with the blocking block 811 on the surface of the linkage disk 2 8. When the movable rotor module 31 continues to rotate, it will provide driving force to the shaft 4.

When the switched reluctance motor is in operation and the number of movable rotor modules 31 needs to be reduced, the gear plate 91 is driven in reverse to rotate in the above-mentioned manner, so that a plurality of magnetic isolation plates 92 are combined to form a circular ring, and the magnetic isolation plates 92 are used to push the pressure block 61 to move toward the inside of the rotating ring 6, and the linkage disk 1 7 and the linkage disk 2 8 are separated by the wedge rod 62.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. A low loss switched reluctance motor comprising a housing (1), characterized in that: a plurality of groups of stator modules (2) are fixedly arranged in the machine shell (1), a rotating shaft (4) is rotatably arranged in the machine shell (1), a plurality of groups of rotor modules are arranged on the surface of the rotating shaft (4), and the rotor modules correspond to the stator modules (2) one by one;

The rotor modules comprise fixed rotor modules (3) and movable rotor modules (31), the fixed rotor modules (3) are fixedly arranged on the surface of the rotating shaft (4), and the movable rotor modules (31) can be rotatably arranged on the surface of the rotating shaft (4) through bearings (5);

the movable rotor module (31) can be locked on the surface of the rotating shaft (4), and when the windings inside the stator modules (2) corresponding to the movable rotor module (31) are powered on, the movable rotor module (31) and the rotating shaft (4) are in a locking state;

a linkage assembly is arranged between the movable rotor module (31) and the rotating shaft (4), the movable rotor module (31) and the rotating shaft (4) are in a locking state or a relative rotating state by utilizing the linkage assembly, and the linkage assembly comprises:

The swivel (6) is fixedly arranged on the outer ring surface of the bearing (5) and is fixedly connected with the movable rotor module (31);

the first linkage disc (7) is axially and slidably arranged on the surface of the swivel (6), pushing blocks (71) are fixedly arranged on the surface of the first linkage disc (7), and the pushing blocks (71) are circumferentially distributed in a ring shape;

The second linkage disc (8) is fixedly arranged on the surface of the rotating shaft (4), telescopic blocking blocks (811) are arranged on the surface, close to one side of the first linkage disc (7), of the second linkage disc (8), the blocking blocks (811) are distributed circumferentially in a ring shape, and the blocking blocks (811) can be matched with the pushing blocks (71);

An adjusting box (9) is fixedly arranged between the two corresponding stator modules (2) of the linkage assembly, a fluted disc (91) is rotatably arranged in the adjusting box (9), a plurality of arc-shaped adjusting grooves (911) are formed in the side surface of the fluted disc (91), and the arc-shaped adjusting grooves (911) are distributed in an annular circumferential direction;

A plurality of fan-shaped magnetic isolation plates (92) are radially and slidably arranged in the adjusting box (9), guide posts are arranged on the surfaces of the magnetic isolation plates (92), and the guide posts are positioned in the adjusting groove (911);

The magnetic isolation plates (92) are combined to form a circular ring when being contacted in sequence, and the magnetic isolation plates (92) are made of magnetic isolation materials;

the surface of the swivel (6) is provided with a telescopic pressing block (61), a wedge-shaped rod (62) is axially and slidably arranged in the swivel (6), one end of the wedge-shaped rod (62) is fixedly connected with the first linkage disc (7), a compression spring is arranged between the other end of the wedge-shaped rod and the swivel (6), and the wedge-shaped end of the wedge-shaped rod (62) corresponds to the pressing block (61);

The inner annular surface of the magnetism isolating plate (92) is matched with the surface of the swivel (6), and the magnetism isolating plate (92) can be contacted with the pressing block (61) when moving towards the center direction of the adjusting box (9).

2. The low-loss switched reluctance motor of claim 1 wherein: push blocks (71) are arranged in the two rotation directions of the first linkage disc (7), and blocking blocks (811) are arranged in the two rotation directions of the second linkage disc (8);

When the block (811) in one direction extends out of the surface of the second linkage disc (8), the block (811) in the other direction is accommodated in the second linkage disc (8), and the block (811) extending out of the surface of the second linkage disc (8) can be matched with the push block (71) in the corresponding rotation direction of the surface of the first linkage disc (7).

3. The low-loss switched reluctance motor of claim 2 wherein: a notch (81) is formed in the surface of the second linkage disc (8), a supporting plate (812) is slidably arranged in the notch (81), a block (811) is positioned in the notch (81), a telescopic spring is arranged between the block (811) and the supporting plate (812), and a reset spring is arranged between the supporting plate (812) and the bottom surface of the notch (81);

The inside of the second linkage disc (8) is provided with guide grooves (82) which are distributed in a crossing way, two intersecting grooves in the guide grooves (82) are arc-shaped grooves, the two intersecting grooves are respectively distributed in an extending way along two rotating directions of the second linkage disc (8), and one ends of the two intersecting grooves, which are far away from the center of the second linkage disc (8), are respectively communicated with the corresponding notch (81) in two directions;

Push balls (821) are placed in the two crossed grooves, limiting portions (822) protruding inwards are arranged at positions, close to the crossing points, of arc edges on the outer sides of the two crossed grooves, and limiting plates (823) are rotatably mounted on the surfaces of the limiting portions (822).

4. A low loss switched reluctance machine according to claim 3, wherein: the second linkage disc (8) is made of a magnetic isolation material, the limiting plate (823) is made of a magnetic attraction material, and the pushing ball (821) is made of a magnetic material.

5. The low-loss switched reluctance machine of claim 4 wherein: the fixed rotor modules (3) are two groups, and the two groups of fixed rotor modules (3) are symmetrically distributed on two sides of a radial center plane of a stator formed by a plurality of stator modules (2);

When the number of the movable rotor modules (31) is even, the two movable rotor modules (31) are in a group, and the two movable rotor modules (31) in the same group are symmetrically distributed on two sides of the radial center plane;

When the number of the movable rotor modules (31) is odd, one movable rotor module (31) is a group, the movable rotor modules are arranged on the surface of the rotating shaft (4) by taking the radial center plane as a symmetrical plane, the other two movable rotor modules (31) are a group, and the two movable rotor modules (31) in the same group are symmetrically distributed on two sides of the radial center plane;

The connection states of the two movable rotor modules (31) in the same group and the rotating shaft (4) are the same.

6. The low-loss switched reluctance machine of claim 5 wherein: the surface of the fluted disc (91) is meshed with a transmission gear (11);

the inside rotation of casing (1) is installed transmission shaft (10), drive gear (11) are located the surface of transmission shaft (10), the keyway has been seted up on the surface of transmission shaft (10), radial slidable mounting in inner ring surface of drive gear (11) has fixture block (111), fixture block (111) can with the keyway cooperation, fixture block (111) are driven by the electromagnetism piece.

7. A low loss switched reluctance motor control system employing the low loss switched reluctance motor of claim 6 comprising an SRD system characterized by: the SRD system comprises:

The rotating speed and torque setting identification module is used for setting the running rotating speed and the load torque of the switched reluctance motor and simultaneously identifying and acquiring the rotating speed and the load torque of the switched reluctance motor running;

The power supply control module comprises a stator winding circuit control module and an electromagnetic block power supply connection control module;

the stator winding circuit control module is used for switching on a power supply for windings in the corresponding stator module (2) according to the running rotating speed and the load torque of the switched reluctance motor set by the rotating speed and torque setting identification module;

the electromagnetic block power-on control module is used for switching on the power supply for the corresponding electromagnetic block according to the running rotating speed and the load torque of the switched reluctance motor set by the rotating speed and torque setting identification module.