Stator flux linkage set method of brushless DC motor direct torque control

A technology of stator flux linkage given and direct torque control, applied in the direction of single motor speed/torque control, motor generator control, electronic commutation motor control, etc. Good performance, improve system operation efficiency, and overcome the effect of starting difficulties

Inactive Publication Date: 2010-05-05
江苏卡帕电气科技有限公司
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  • Abstract
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Problems solved by technology

Wang Xiaoyuan from Tianjin University and Gao Jin from Nanjing University of Aeronautics and Astronautics only pointed

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  • Stator flux linkage set method of brushless DC motor direct torque control
  • Stator flux linkage set method of brushless DC motor direct torque control
  • Stator flux linkage set method of brushless DC motor direct torque control

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Embodiment Construction

[0014] like figure 1 , on the basis of the ideal stator flux trajectory during the operation of the brushless DC motor, the present invention gives the stator flux of the brushless DC motor direct torque control ψ S * 1 is divided into rotor induction flux linkage given ψ f * 2 and stator armature reaction flux linkage given ψ a * 3 two parts, and then set the method separately. Among them, the rotor induced flux linkage given ψ f * 2 is generated by the excitation of the rotor permanent magnet, and the three-phase rotor induced flux linkage ψ is obtained by integrating the counter electromotive force 4 f 5. Three-phase rotor induced flux linkage ψ f 5 Get the rotor induced flux given ψ by CLARK transformation f * 2; Armature reaction flux linkage given ψ a * 3 Generated by the stator current, use the reference current method 6 to design the stator three-phase current given i ref 7, and by the formula ψ a =L×i to get the three-phase armature reaction flux linkage...

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Abstract

The invention discloses a stator flux linkage set method of brushless DC motor direct torque control, a given rotor flux linkage psif* and a given stator armature reaction flux linkage psia* are respectively set, and a given stator flux linkage psiS* is obtained by performing resultant vector on the above two parts. In the invention, the stator flux linkage set coincides with the running track of the stator flux linkage with an ideal control system, and the brushless DC motor direct torque control system has stable running and good control performance; the flux linkage set value can be dynamically and automatically adjusted along with the change of the working condition of the control system, thus inhibiting motor torque pulsation and improving running efficiency of the system.

Description

technical field [0001] The invention relates to a brushless DC motor, in particular to a given method for stator flux linkage of direct torque control thereof. Background technique [0002] Brushless DC motors not only have the advantages of simple structure, reliable operation, and convenient maintenance of AC motors, but also have the advantages of high operating efficiency and good speed regulation performance of DC motors. In recent years, the cost of brushless DC motors has been gradually reduced, and they are more and more widely used in high-performance speed regulation systems and servo control systems. [0003] Direct torque control adopts the analysis method of space vector, directly calculates and controls the motor torque in the stator coordinate system, adopts the stator magnetic field orientation, and generates PWM signals with the help of discrete two-point hysteresis regulators, and directly controls the switching of the inverter. The state is optimally cont...

Claims

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Application Information

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IPC IPC(8): H02P6/08H02P21/14H02P21/30
CPCY02P80/10
Inventor 魏海峰黄巧亮
Owner 江苏卡帕电气科技有限公司
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