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Drive system of open-winding permanent magnet synchronous motor for mine traction and its working method

A permanent magnet synchronous motor and drive system technology, applied in control systems, control generators, motor control, etc., can solve problems such as large zero-sequence currents, achieve the effects of reducing failure rates, realizing real-time control, and high starting torque

Active Publication Date: 2020-12-29
SHANGHAI JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing topology is that two converters share a single power supply, which is prone to generate a large zero-sequence current, which needs to be suppressed by adding a zero-sequence reactor

Method used

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  • Drive system of open-winding permanent magnet synchronous motor for mine traction and its working method
  • Drive system of open-winding permanent magnet synchronous motor for mine traction and its working method
  • Drive system of open-winding permanent magnet synchronous motor for mine traction and its working method

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Embodiment Construction

[0050] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0051] Such as Figure 1 to Figure 5 As shown, to realize a kind of open-winding permanent magnet motor drive system and control method thereof for mine traction based on the bilateral power supply of the three-level converter of the present invention, realize the connection mode of the drive system as follows:

[0052]1. The main circuit part is connected to the first isolation transformer 12 and the second isolation transformer 22 by three-phase voltage 1 respectively, and the first isolation transfor...

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Abstract

The invention provides an opening-winding permanent-magnet synchronous motor driving system for mine traction and a working method thereof. The driving system is composed of a first power supply circuit connected with a three-phase voltage, a second power supply circuit connected with the three-phase voltage, a permanent-magnet motor connected with the first power supply circuit and the second power supply circuit, a sampling module connected with the permanent-magnet motor, a main control module connected with the sampling module, and a driving module connected with the main control module, the first power supply circuit and the second power supply circuit. The driving system has the following beneficial effects: the neutral point of the permanent-magnet synchronous motor is opened to form a winding opening structure with dual ports; the opening-winding permanent-magnet synchronous motor is used as a driving motor of the mining electric locomotive, so that the requirement of the largestarting torque is met and the starting characteristic of the driving system is improved; and two converters are connected to the two ends of the opening-winding permanent-magnet synchronous motor, so that the system stability is improved and the fault rate is reduced.

Description

technical field [0001] The invention belongs to the field of high-power AC speed regulation, in particular to an open-winding permanent magnet synchronous motor driving system for mine traction and a working method thereof. Background technique [0002] Considering that in the coal industry, the working conditions of the mine are harsh, and there are strict requirements on the special indicators of the motor such as explosion-proof, dust-proof and moisture-proof, the open-winding permanent magnet synchronous motor is used as the drive motor of the mine electric locomotive. Not only has good starting characteristics, but also can effectively reduce the failure rate and reduce operating costs. At the same time, the system efficiency of the open-winding permanent magnet synchronous motor is 15%-20% higher than that of the asynchronous motor, which meets the needs of high-power AC speed regulation. [0003] An open-winding permanent magnet synchronous motor and a converter form ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/13H02P21/18H02P21/22H02P6/34H02P25/026H02P27/08
CPCH02P6/08H02P21/00H02P27/08H02P2207/05
Inventor 姜建国张丹周中正李洪亮罗
Owner SHANGHAI JIAOTONG UNIV
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