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Permanent magnet synchronous motor, robot and method for improving motor torque regulation function

A permanent magnet synchronous motor and permanent magnet technology, which is applied to synchronous motors with stationary armatures and rotating magnets, synchronous machine parts, magnetic circuits, etc., can solve the problems of inconvenient recalibration and high cost, and achieve improved gas Gap magnetic density, reduce the harmonic content of magnetic density, and improve the effect of harmonic noise

Active Publication Date: 2020-10-30
GREE ELECTRIC APPLIANCES INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing treatment of cogging torque includes changing the installation method of the rotor permanent magnet and changing the shape of the stator cogging. Although the above method can reduce the cogging torque to a certain extent, its There is a problem of high cost and inconvenient recalibration in the future

Method used

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  • Permanent magnet synchronous motor, robot and method for improving motor torque regulation function
  • Permanent magnet synchronous motor, robot and method for improving motor torque regulation function
  • Permanent magnet synchronous motor, robot and method for improving motor torque regulation function

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Embodiment 1

[0031] The invention provides a motor stator. like figure 1 As shown, the motor stator of the embodiment of the present invention includes stator cores 1, 2 and stator coils 3, the stator core includes stator teeth 1 and stator yoke 2, and the stator cores 1 and 2 are cylindrical or roughly cylindrical The structure has a plurality of stator slots 5 in the circumferential direction, and the stator slots 5 pass through the stator cores 1 and 2 in the axial direction, and the stator coil 3 is wound on the stator cores 1 and 2 through the stator slots 5. 1 and 2 are also provided with at least one auxiliary groove 6, and the magnetic generating component 7 is arranged in the auxiliary groove 6. Preferably, the magnet-generating component 7 can be adjusted to rotate or move relative to the auxiliary groove.

[0032] Further, such as figure 1 As shown, a boot 4 is formed at one end of the tooth part 1, and the auxiliary groove 6 is optimally opened on the boot part 4 of the stat...

Embodiment 2

[0042] The invention also provides a permanent magnet synchronous motor. It has the stator structure described in Embodiment 1. The application of the motor stator of the present invention on the motor is illustrated below through Embodiment 2.

[0043] The stator of the permanent magnet synchronous motor is usually powered by a frequency converter, and the conduction sequence and conduction rate of the armature windings of each phase of the stator are controlled according to the rotor position signal. The stator generates a circular rotating magnetic field through the three-phase symmetrical current, and the magnetic pulling force between the rotating magnetic field and the rotor magnetic poles pulls the rotor to rotate synchronously with the rotating magnetic field. Cogging torque is the torque generated by the interaction between the permanent magnet and the iron core when the winding of the permanent magnet motor is not energized. It is caused by the tangential component ...

Embodiment 4

[0062] The present invention also protects a method embodiment for improving the motor torque adjustment function, which makes the motor stator have the above-mentioned motor stator structure.

[0063] like Figure 5 The current motor shown also has a stator core and a stator coil. The stator core also includes a stator tooth portion 101 and a stator yoke portion 102. The stator tooth portion 101 is circumferentially provided with a plurality of stator slots 105, and the stator slots 105 Through the axial direction of the stator core, the stator coil 103 is wound on the stator core 101 through the stator slot 105 . This patent proposal retains these structural advantages of the current motor, improves its stator structure, and sets an auxiliary groove magnetic generating part at the shoe part of its teeth, so that its magnetic field can be adjusted. The magnetic generating part is preferably a magnetically conductive steel rod, the shape of the auxiliary groove is designed to...

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Abstract

The invention provides a motor stator and a method for improving a motor torque regulation function by utilizing the same. The motor stator comprises a stator core and a stator coil. The stator core comprises a stator tooth portion and a stator yoke portion. A shoe portion is formed at one end of the stator tooth portion; and the stator core is provided with a plurality of stator tooth slots in the circumferential direction. The stator tooth slots run through in the axial direction of the stator core. The stator coil is wound on the stator core through the stator tooth slots. The stator core is provided with at least one auxiliary slot. The auxiliary slot is provided with a magnetic generation component. By providing the magnetic generation component in the auxiliary slot, the tooth slot torque can be adjusted conveniently to meet different control requirements.

Description

technical field [0001] The invention relates to a motor stator, in particular to a motor stator for a permanent magnet synchronous motor. Background technique [0002] There are a large number of equipment in the field of motion control in modern industry, such as automatic production equipment such as manipulators, robots, and winding machines, and the requirements for control accuracy are becoming increasingly stringent. The control accuracy is mainly composed of the control unit (namely the controller) and the execution unit (namely the motor). Due to its high control precision, small size, light weight and other characteristics, permanent magnet synchronous motor has a wide range of applications in the above fields. It has developed rapidly in recent years, and the research work at home and abroad is also extremely active. Compared with induction motors, electrically excited synchronous motors and switched reluctance motors, permanent magnet synchronous motors have simp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/16H02K1/17H02K21/14H02K21/02
CPCH02K1/165H02K1/17H02K21/02H02K21/14
Inventor 王瑞东李峰岩王周叶黄侠昌周成海吉扬宏周楚航
Owner GREE ELECTRIC APPLIANCES INC
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