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Synchronous motor brushless excitation device realized by adopting switching power supply

A technology for synchronous motors and switching power supplies, which is applied in electromechanical devices, asynchronous induction motors, and control generators through magnetic field changes. It can solve the problems of canceling brushes and slip rings, complex structures, and not replacing brushes and slip rings. Achieve the effect of low loss and simple structure

Inactive Publication Date: 2014-12-10
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the system applies the switching power supply to the excitation system, it only replaces the exciter, and does not replace the brushes and slip rings.
[0006] The above patents all have one thing in common, that is, there is no real cancellation of brushes and slip rings, and the structure is more complicated

Method used

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  • Synchronous motor brushless excitation device realized by adopting switching power supply
  • Synchronous motor brushless excitation device realized by adopting switching power supply
  • Synchronous motor brushless excitation device realized by adopting switching power supply

Examples

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Effect test

Embodiment 1

[0023] A brushless excitation device for a synchronous motor is realized by using a switching power supply, and its composition includes: a stator 1 and a rotor 2 of a synchronous motor, a controller 3 is installed inside the stator, the controller is connected to an inverter 4, and the inverter The transformer is connected to the magnetic tank transformer, and the magnetic tank transformer is connected to the rectifier 5, and the rectifier is connected to the excitation winding 6, and the excitation winding is wound on the iron core of the rotor.

[0024] The brushless excitation device for a synchronous motor is realized by using a switching power supply, the magnetic tank transformer includes a primary coil 7 installed on the stator, the primary coil is coupled to a secondary coil 8 through an air gap, and the The secondary coil is mounted on the shaft 9 of the rotor.

[0025] The brushless excitation device of the synchronous motor is realized by using a switching power su...

Embodiment 2

[0027] as attached Figure 1-3 As shown, the secondary iron core 10 of the magnetic tank transformer and the rectifier are coaxially arranged with the motor rotor iron core and the field winding. The other part of the switching power supply is installed on the stator of the synchronous motor, the controller and the inverter are placed in the cavity of the stator shell, the common DC bus is arranged on the inner surface of the stator shell, and the primary iron core 11 of the magnetic tank transformer is fixed at the end of the motor stator , and is opposite to the secondary iron core of the magnetic tank transformer, and the gap between the primary and secondary iron cores is about 0.5mm. The secondary coil of the magnetic tank transformer is wound inside the secondary core, and the primary coil is wound inside the primary core.

[0028] as attached Figure 4 As shown, the controller completes the control of the inverter under the power supply of the DC bus voltage, outputs ...

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Abstract

The invention relates to a synchronous motor brushless excitation device realized by adopting a switching power supply. In a synchronous motor, because an electric brush is wore, an operator needs to frequently patrol for replacing the electric brush, and meanwhile, the electric brush always causes stronger high-frequency electromagnetic interference in a working process to worsen the electromagnetic environment of a motor system and bring serious electromagnetic interference for a driving system. The synchronous motor brushless excitation device comprises a stator (1) and a rotor (2) of a synchronous motor, wherein a controller (3) is arranged in the stator and is connected with an inverter (4), the inverter is connected with a magnetic-tank transformer which is connected with a rectifier (5), and the rectifier is connected with an excitation winding (6) which is wound on an iron core of the rotor. The invention is used for a synchronous motor.

Description

Technical field: [0001] The invention relates to a brushless excitation device for a synchronous motor realized by using a switching power supply. Background technique: [0002] Permanent magnet synchronous motors have been widely used in various fields due to their high speed, small size, simple structure, and reliable operation. However, due to the high coercive force of rare earth permanent magnets, it is difficult to adjust the magnetic field of permanent magnet generators. Poor controllability and high cost. In contrast, the excitation motor can flexibly control and adjust the excitation magnetic field through the establishment of the excitation current, and the cost is low, so the excitation motor is gradually replacing the permanent magnet motor. The biggest advantage of the current brushed excitation motor is that the boundary between the motor and the excitation system is obvious, relatively independent, intuitive and clear, and the rotor excitation current and exc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K17/36H02P9/14
Inventor 王旭东刘金凤金宁治余腾伟
Owner HARBIN UNIV OF SCI & TECH
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