Serial compensation direct torque control method for winding permanent magnetic synchronous motor

A technology of direct torque control and permanent magnet synchronous motor, which is applied in motor generator control, AC motor control, electronic commutation motor control, etc., and can solve problems such as non-optimal control effect

Active Publication Date: 2014-08-20
ZHEJIANG UNIV
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  • Application Information

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Problems solved by technology

[0005] However, in the flux-weakening calculation module of this patent, the calculation of the maximum voltage only considers the specific situation that the main converter provides all the active power and the compensation converter provides all the reactive power, and it is assumed that the DC bus voltage and capacitor voltage are c

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  • Serial compensation direct torque control method for winding permanent magnetic synchronous motor
  • Serial compensation direct torque control method for winding permanent magnetic synchronous motor
  • Serial compensation direct torque control method for winding permanent magnetic synchronous motor

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Embodiment Construction

[0059] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0060] like figure 1 As shown, the motor system in this example consists of a DC power supply 1, a main converter 2, an open-winding permanent magnet synchronous motor 3, a compensation converter 4, a large capacitor 5, a stator voltage and current sensor 6, a capacitor voltage sensor 8, a speed sensor 7 and a control device 28 and so on. The controller 28 realizes the distribution of active power and reactive power through the coordinated control of the main converter 2 and the compensating converter 4, so that the main converter 2 mainly undertakes active power and the compensating converter 4 mainly undertakes the control effect of reactive power. Through the control of the compensating converter 4, the impedance characteristics of the open-winding pe...

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Abstract

The invention disclose a serial compensation direct torque control method for a winding permanent magnetic synchronous motor. Through cooperation control of a main converter and a compensation converter, the main converter bears most active power and necessary reactive power; and the compensation converter bears most reactive power and necessary active power, and the power factor of the main converter is enabled to be close to one or reach one. By using a direct torque control method, during a weak magnetic control process, the actual situations that the main converter simultaneously bears a part of reactive power and DC bus voltages and capacitance voltages may change are taken into consideration, and a weak magnetic control method of voltage feedback of the main converter is employed during the weak magnetic control process, such that the weak magnetic work area of a motor is effectively expanded, and the operation scope of the motor is enlarged.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a series compensation direct torque control method of an open-winding permanent magnet synchronous motor. Background technique [0002] Permanent magnet motors have high power density, high operating efficiency, simple structure, small size, light weight, and stable operation. They have been widely used in electric locomotives, electric vehicles, aerospace, national defense and other fields. However, since the permanent magnet motor adopts permanent magnet excitation, it is difficult to increase the speed by weakening the magnetic field, and the operating range is narrow, which limits the application of the permanent magnet motor in electric traction. The current common solution is to improve the design of the motor, but the operating efficiency and performance of the motor will be reduced to varying degrees. Therefore, it is necessary to find a topology and co...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P27/12
Inventor 孙丹周文志林斌
Owner ZHEJIANG UNIV
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