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Vertical force control method of magnetic flux reverse permanent-magnet linear motor

A permanent magnet linear motor, magnetic flux reversal technology, applied in electronic commutation motor control, motor generator control, AC motor control and other directions, can solve problems such as reducing work efficiency and increasing resistance

Active Publication Date: 2013-10-02
指南者品牌管理(苏州)有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Existing studies have shown that the vertical force of the motor is an important factor affecting efficiency, and the value is usually 2-8 times that of the horizontal thrust, which greatly increases resistance and reduces work efficiency when the motor is running

Method used

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  • Vertical force control method of magnetic flux reverse permanent-magnet linear motor
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  • Vertical force control method of magnetic flux reverse permanent-magnet linear motor

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Embodiment Construction

[0030] The present invention will be further explained below according to the accompanying drawings and specific embodiments of the specification.

[0031] Such as figure 1 As shown, a vertical force control method of a magnetic flux reversal permanent magnet linear motor, the steps include:

[0032] 1) Use the method of integrating the surface of Maxwell's electromagnetic force tensor to obtain the electromagnetic force in the Z direction of the linear motor, that is, the vertical force

[0033] F zi = L i μ 0 4 ∫ 0 D Re [ H z H z * - H x H z * ] ...

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Abstract

The invention discloses a vertical force control method of a magnetic flux reverse permanent-magnet linear motor. The method comprises a vertical force optimal algorithm and a control switcher, wherein the vertical force optimal algorithm comprises the steps of establishing an auxiliary function to obtain optimal d and q axis current, and obtaining minimum copper loss and vertical force under the condition of keeping push force unchanged during steady-state operation, so that the working efficiency and performance of the motor are improved; the control switcher adopts a control mode that the d axis current is zero in a dynamic stage, and adopts a vertical force optimal control mode in a steady stage. The method is rapid in response and easy to carry out.

Description

technical field [0001] The invention relates to a vertical force control method, in particular to a vertical force control method of a magnetic flux reversal permanent magnet linear motor. Background technique [0002] With the development of cities in our country, the traffic problem has become a bottleneck of urban development. Due to the advantages of strong climbing ability, strong line applicability, low engineering cost and low noise, the application of linear motor rail transit system in urban rail transit has attracted more and more attention. Linear motors are divided into induction type and permanent magnet type. In my country, Guangzhou Metro Line 4 used linear motor vehicles for the first time in China. The traction motor used is an induction linear motor, but the motor has many disadvantages such as large reactive power loss and low power factor; The linear motor has high power index, high efficiency, and high power factor. It only needs to absorb active power ...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P25/06
Inventor 赵文祥刘虎吉敬华徐亮刘国海
Owner 指南者品牌管理(苏州)有限公司
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