Permanent magnet synchronous motor driving system capable of switching winding

A permanent magnet synchronous motor and drive system technology, applied in the direction of electronic commutation motor control, control system, control generator, etc., can solve the sudden change of output torque, no effective control method for winding switching, dynamic speed control system Performance impact and other issues, to achieve the effect of less reactive power, improve operating efficiency and fault tolerance, and improve reliability

Active Publication Date: 2014-03-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, patent 101911473A discloses a winding switching device for a three-phase AC motor. The device is connected to the separation part of the stator winding to realize the working switching of different parts of the stator winding, so that the winding switching between high speed and low speed of the motor can

Method used

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  • Permanent magnet synchronous motor driving system capable of switching winding
  • Permanent magnet synchronous motor driving system capable of switching winding
  • Permanent magnet synchronous motor driving system capable of switching winding

Examples

Experimental program
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Embodiment 1

[0040] Figure 2(a) A structure of the permanent magnet synchronous motor drive system with switchable windings of the present invention is shown. As shown in the figure, the permanent magnet synchronous motor drive system includes: a permanent magnet synchronous motor with the stator three-phase armature winding ends opened, an inverter Transformer 1, inverter 2, winding switch conversion device and system controller. Among them, the stator three-phase armature winding of the permanent magnet synchronous motor is divided into a set of three-phase winding 1 composed of windings A1, B1, and C1, and a set of three-phase windings composed of windings A2, B2, and C2 by using the above-mentioned method of winding splitting, combination and reconstruction. A set of three-phase windings 2; the ends of the windings A1, B1, and C1 are respectively connected to the three-phase output ends of the inverter 1, and the ends of the windings A2, B2, and C2 are respectively connected to the th...

Embodiment 2

[0046] Figure 2(b) Another structure of the permanent magnet synchronous motor drive system with switchable windings of the present invention is shown. The difference from the structure of Embodiment 1 is that the inverter 1 and the inverter 2 are respectively powered by two DC power supplies Udc1, Udc2 Independent power supply.

Embodiment 3

[0048] Figure 2(c) Another structure of the permanent magnet synchronous motor drive system with switchable windings of the present invention is shown. As shown in the figure, the winding switch conversion device in this embodiment includes three thyristors connected end to end to form a delta connection; The three connection points between them are respectively connected to the three intermediate taps, and the gates of the three thyristors are respectively connected to the system controller signal.

[0049]Its working principle and process are similar to the winding switching converter device in Embodiment 1. When the winding switching needs to be realized, the system controller gives a control signal to the gates of the three thyristors at the same time to control the opening of the three thyristors. and shutdown. When all three thyristors are turned on, such as Figure 2(c) As shown, the three middle taps of the three-phase winding of the permanent magnet synchronous mot...

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PUM

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Abstract

The invention discloses a permanent magnet synchronous motor driving system capable of switching a winding. According to the permanent magnet synchronous motor driving system, a winding switch conversion device with a simple structure is utilized to realize automatic reconstruction of the winding. Meanwhile, operation switching of the low-speed and high-speed windings is realized with combination of double-inverter coordination control and flux weakening control so that range of operation rotating speed of the driving system is substantially widened, and operation efficiency and fault tolerance performance of the system are enhanced. In the low-speed state, single-inverter double-winding operation is performed; in the intermediate-speed state, double-inverter double-winding operation is performed; and in the high-speed state, firstly permanent magnet synchronous motor terminal voltage is limited by utilizing the flux weakening control mode, then the winding is switched and single-inverter single-winding operation is performed. A double-inverter circuit is adopted so that working modes of the system are flexible and various, i.e. both single-inverter operation and double-inverter operation can be realized, and thus the system has certain fault tolerance capability.

Description

technical field [0001] The invention relates to a drive system of a permanent magnet synchronous motor, in particular to a drive system of a permanent magnet synchronous motor with switchable windings. Background technique [0002] Due to the outstanding advantages of high efficiency and high torque / power density, the permanent magnet synchronous motor drive system has gradually become one of the important development directions of modern electric traction systems such as hybrid electric vehicles and pure electric vehicle drive systems. However, for electric vehicles such as electric vehicles, the operating speed range is very wide, so the speed regulation range of the drive system is required to be high, and the ratio of the maximum speed to the base speed reaches or exceeds 5:1. The permanent magnet synchronous motor has the inherent problem that the air gap magnetic field is difficult to adjust after it is manufactured. With the increase of the speed in the speed control ...

Claims

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Application Information

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IPC IPC(8): H02P25/18H02P21/00H02P27/08
Inventor 张卓然耿伟伟田波
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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