Open winding permanent magnet synchronous motor series compensation vector control system and control method

A technology of permanent magnet synchronous motor and vector control, which is applied in the direction of vector control system, control system, motor generator control, etc., and can solve the problems of insufficient control performance and small operating range

Active Publication Date: 2014-05-07
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem that the operating range of the conventional permanent magnet synchronous motor system is small and the control performance is not high enough under the condition of limited power supply, the present invention provides an open-windin

Method used

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  • Open winding permanent magnet synchronous motor series compensation vector control system and control method
  • Open winding permanent magnet synchronous motor series compensation vector control system and control method
  • Open winding permanent magnet synchronous motor series compensation vector control system and control method

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specific Embodiment

[0141] The following is the test we conducted on this scheme. The parameters of the open-winding permanent magnet synchronous motor used are shown in Table 1.

[0142] Table 1 Parameters of open-winding permanent magnet synchronous motor

[0143] Stator resistance Rs

1.35Ω

DC bus voltage

311V

Direct axis inductance Ld

7.76e-3H

voltage limiter

150V

Quadrature axis inductance Lq

17e-3H

Capacitance

100uF

Permanent magnetic flux linkage

0.1286Wb

Rated speed

2500rpm

Number of pole pairs

4

Mechanical inertia

0.00109Kgm 2

rated current

4.07A

[0144] Figure 5 is the simulation diagram of the motor speed. Among them, N1 represents the rotational speed of the permanent magnet synchronous motor when only the main converter 2 controls it; N2 is the rotational speed of the permanent magnet synchronous motor when the compensating converter 4 is added and the ...

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Abstract

The invention discloses an open winding permanent magnet synchronous motor series compensation vector control system which is composed of a direct-current power source, a main converter powered by the direct-current power source, an open winding permanent magnet synchronous motor, a compensation converter powered by a power supply capacitor, voltage sensors arranged at the two ends of the power supply capacitor, a current sensor arranged on the stator side of the open winding permanent magnet synchronous motor, a speed sensor arranged on a rotation shaft of the open winding permanent magnet synchronous motor, and a controller controlling the main converter and the compensation converter. According to the open winding permanent magnet synchronous motor series compensation vector control system, the compensation converter which is arranged at the stator tail end of the open winding permanent magnet synchronous motor and powered by the power supply capacitor is controlled to equivalently change stator winding impedance, so that the power factor of the main converter approaches to or reaches 1; through cooperation control over the main converter and the compensation converter, distribution of active power and reactive power is changed, performance of the motor is improved, a flux weakening control area of the permanent magnet synchronous motor is expanded, and the operation range is widened.

Description

technical field [0001] The invention relates to a control system of a permanent magnet synchronous motor, in particular to a series compensation vector control system and a control method of an open-winding permanent magnet synchronous motor. Background technique [0002] Due to its unique advantages in terms of efficiency, power density, volume and weight, permanent magnet motors have become the preferred solution for motor bodies in modern electric traction systems. However, due to the use of permanent magnets for excitation, permanent magnet motors have the problems of difficulty in increasing speed due to weak magnetic field and narrow operating range. In order to make it better applied in electric traction occasions such as electric vehicles and electric ships, the conventional method is to improve the design of the motor body. The improvement scheme can achieve the purpose of adjusting the magnetic field of the motor to a certain extent, but at the same time This lead...

Claims

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Application Information

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IPC IPC(8): H02P21/14
Inventor 孙丹周文志林斌
Owner ZHEJIANG UNIV
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