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Motor rotor structure and permanent magnet synchronous motor

A technology of motor rotor and rotor iron core, applied in synchronous machine, synchronous machine parts, magnetic circuit shape/style/structure, etc. Cost and control difficulty, etc., to achieve the effect of ensuring the torque output capacity and increasing the maximum operating speed

Active Publication Date: 2020-06-19
福州凯美翼智能设备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composition of the field weakening control system is relatively complex, and the control is difficult, which will inevitably increase the operation cost and control difficulty of the permanent magnet synchronous motor, and bring certain negative effects to the actual production.

Method used

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  • Motor rotor structure and permanent magnet synchronous motor
  • Motor rotor structure and permanent magnet synchronous motor
  • Motor rotor structure and permanent magnet synchronous motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] refer to figure 1 , a motor rotor structure, comprising a rotor core 1, a rotating shaft 4, the front end of the rotor core 1 is provided with a front fixed disk 2, the rear end of the rotor core 1 is provided with a rear fixed disk 3, the diameter of the rear fixed disk 3 is larger than The diameter of the front fixed disk 2, a plurality of magnetic poles 5 are evenly fixed on the circumferential surface of the rotor core 1 along its circumferential direction, and movable magnetic shielding blocks 6 are arranged between adjacent two magnetic poles 5. The shielding block 6 can move forward and backward along the axial direction of the rotor. A first pull cord 8 is arranged in front of the magnetic shield block 6 along the axial direction of the rotor core 1. The first pull cord 8 is a stretchable elastic cord. The front end of the rope 8 is relatively fixed to the front fixed plate 2, the rear end of the first stay rope 8 is connected and fixed to the front of the magne...

Embodiment 2

[0041] refer to Figure 6 , a permanent magnet synchronous motor, including the rotor structure in Embodiment 1, and also includes a casing 23 and a stator structure, the bottom of the casing 23 is fixed with the base 1, the rotor structure is installed inside the casing 23, and the rear end of the casing 23 is set There is an accommodating portion 25 for accommodating the second fixed disc. The diameter of the accommodating portion 25 is larger than that of the main body of the housing 23. The rear portion of the accommodating portion 25 is an open structure, and a rear end is arranged behind the accommodating portion 25. The cover 26 is provided with a plurality of second threaded holes 27 along its circumference on the rear end surface of the accommodating portion 25, and a hole position is opened at the rear end cover 26 corresponding to each second threaded hole 27, and in the hole A locking bolt 28 is worn at the position, and the locking bolt 28 is threadedly connected ...

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PUM

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Abstract

The invention discloses a motor rotor structure and a permanent magnet synchronous motor. The magnetic field shielding block can be automatically adjusted according to the rotating speed of the rotor,the magnetic flux path is changed through the position change of the magnetic field shielding block, the purpose of automatically reducing the permanent magnetic flux along with the increase of the rotating speed is achieved, and thus the highest running speed of the motor is increased on the premise that the power voltage is not changed; as for the same motor, at a low speed, the effective excitation magnetic field is strong, and the torque output capability at the low speed is ensured; when the speed is high, the effective excitation magnetic field is weakened, the highest operation speed of the permanent magnet synchronous motor is improved, and the magnetic field shielding block changes the excitation magnitude through the centrifugal effect of the magnetic field shielding block and thus the rotor does not deflect.

Description

technical field [0001] The invention relates to the technical field of motors, more specifically, it relates to a motor rotor structure and a permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motor is a kind of synchronous motor. Its excitation magnetic field is generated by permanent magnets, which eliminates excitation loss. It has the advantages of high power density, high efficiency and wide speed range. It is widely used in high-performance servo and motion control fields. [0003] Unlike electric excitation synchronous motors, permanent magnet synchronous motors generate excitation magnetic fields by permanent magnets, so the magnetic field strength is generally constant. According to the basic electromagnetic relationship of the permanent magnet synchronous motor, the rotation back EMF of the motor increases with the increase of the speed. When the motor is running at high speed, the rotation back EMF is close to the power ...

Claims

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Application Information

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IPC IPC(8): H02K21/02H02K1/24H02K1/28
CPCH02K1/24H02K1/28H02K21/028
Inventor 李卓青黄振雄常俊国余佳龙
Owner 福州凯美翼智能设备制造有限公司
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