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Assistant magnetism type cage model asynchronous motor

An asynchronous motor and magnetic-assisted technology, applied in asynchronous induction motors, electrical components, electromechanical devices, etc., can solve the problems of power factor and efficiency, low power factor and efficiency, and achieve reduced power loss, increased rotor current, Effect of Exciting Current Reduction

Inactive Publication Date: 2009-01-07
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, as an indicator of motor characteristics, in addition to efficiency, there is also power factor cosθ. Since the three-phase (unidirectional) asynchronous motor generates a rotating magnetic field, the power supply is required to supply the necessary excitation current, so the existing cage-type three-phase (single-phase) ) The power factor and efficiency of asynchronous motor with light load, especially the power factor and efficiency of no-load are low

Method used

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  • Assistant magnetism type cage model asynchronous motor
  • Assistant magnetism type cage model asynchronous motor
  • Assistant magnetism type cage model asynchronous motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] refer to figure 1 , figure 2 , a magnetic-assisted cage type asynchronous motor, the motor is a three-phase motor, which includes a stator 1, a cage rotor 2, the stator 1 is composed of an iron core, a stator winding and a base, the iron core is installed on the base, and the stator The winding is wound on the iron core, the cage rotor 2 is composed of the rotor iron core, the rotor winding and the rotating shaft 5, the rotor winding is wound on the rotor iron core, the rotor iron core is fixedly connected with a rotor support 3, and the rotor support 3 is fixedly connected with the rotating shaft 5. The rotor bracket 3 is fixedly connected with the rotor core, the rotor bracket 3 is sleeved and fixed on the rotating shaft 5, the inner magnetic auxiliary rotor 4 is installed inside the rotor bracket 3, and the inner magnetic auxiliary rotor 4 is sleeved on the rotating shaft 5, and the inner magnetic auxiliary rotor 4 can Rotates relative to the rotor cage and shaft. ...

Embodiment 2

[0029] refer to figure 1 , figure 2 , a magnetic-assisted cage-type asynchronous motor, the motor is a single-phase motor, the basic structure of the motor is the same as the three-phase cage-type asynchronous motor in embodiment 1.

[0030] Its working process is: the motor stator 1 single-phase winding (auxiliary winding is connected to the phase-shifting capacitor to start or run) and single-phase voltage is applied, and the stator winding generates single-phase current, thereby generating an elliptical rotating magnetic field of the stator. During operation, the internal auxiliary magnetic rotor 4 is relatively stator with n 0 The rotating speed and the rotating magnetic field are operated synchronously. The cage rotor 2 rotates at a speed of n relative to the stator 1. The rotating magnetic field and the internal auxiliary magnetic field together form a synchronously rotating air gap magnetic field, which cuts the rotor winding at a relative speed of Δn, and generates ...

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PUM

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Abstract

The asynchronous motor includes stator, cage type rotor. The stator is composed of iron core, stator winding and base seat. The iron core is installed on the said base seat. Stator winding is wrapped on iron core. Cage type rotor is composed of rotor iron core, rotor winding and rotating shaft. Rotor winding is wrapped on rotor iron core. Connected to rotating shaft, the rotor iron core includes a hollow spider and a magnetic rotor with inner assist magnetism. Being connected to rotor iron core fixedly, the spider is sheathed and fixed on the rotating shaft. Being installed inside the spider, the magnetic rotor with inner assist magnetism is sheathed on the rotating shaft. The disclosed assistant magnetism type cage model asynchronous motor raises efficiency and power factor of motor.

Description

(1) Technical field [0001] The invention relates to a motor, in particular to a cage-type asynchronous motor used in an electric drive system. (2) Background technology [0002] Usually, the known three-phase (single-phase) cage-type asynchronous motor generally includes two parts, a stator and a rotor, as well as components such as an end cover, a bearing, a frame, and a fan. The rotating magnetic field is generated by the stator winding, and under the action of the rotating magnetic field, an induced potential is generated in the rotor winding, thereby generating an induced current. The induced current is subjected to force in the rotating magnetic field, thereby generating electromagnetic torque, driving the load, and converting electrical energy into mechanical energy. The existing cage-type three-phase (single-phase) asynchronous motor is used as an energy conversion device for converting electrical energy into mechanical energy. Although the conversion efficiency is r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K17/16
Inventor 冯浩曹文明
Owner ZHEJIANG UNIV OF TECH