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Power-consumption control system of small armature electric induction permanent magnet brush-less DC motor

A technology of DC motor and small armature inductance, applied in the direction of electronic commutation motor control, control system, electrical components, etc., can solve the problem of reducing power supply voltage, increasing stator armature inductance value, reducing motor power factor and dynamic response performance and other problems, to achieve the effect of reducing eddy current loss, reducing torque ripple, and saving electric energy

Inactive Publication Date: 2007-02-28
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce the eddy current loss caused by the PWM modulation of the permanent magnet brushless DC motor, it is necessary to increase the inductance value of the stator armature and reduce the supply voltage. These methods reduce the power factor and dynamic response performance of the motor

Method used

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  • Power-consumption control system of small armature electric induction permanent magnet brush-less DC motor
  • Power-consumption control system of small armature electric induction permanent magnet brush-less DC motor
  • Power-consumption control system of small armature electric induction permanent magnet brush-less DC motor

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Embodiment Construction

[0010] As shown in Figure 1, the present invention consists of a constant DC power supply 1, a step-down chopper 2, an energy consumption unit 3, a three-phase inverter bridge 4, a trapezoidal wave back EMF permanent magnet brushless DC motor 5, and a back EMF detection device 6. Composed of digital controller 7, the constant DC power supply 1 provides a constant voltage to the step-down chopper 2. During the speed-up process of the motor, the counter electromotive force detection device 6 sends the detected peak value of the counter electromotive force to the digital controller 7, and this value is added to an appropriate constant value as the reference input of the step-down chopper. The output voltage of the step-down chopper 2 is provided to the three-phase inverter bridge 4 to drive and adjust the speed of the permanent magnet brushless DC motor 5 . During the speed-up process of the permanent magnet brushless DC motor 5 , the output voltage of the step-down chopper 2 cha...

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Abstract

Being as drive assembly in low power consumption of actuating mechanism in use for controlling gesture of satellite and space station, the disclosed control system is composed of voltage reduced chopper, inductance type brushless DC motor of permanent magnetism in small armature, inversion bridge in three phases, digital controller, and energy consumption etc. The detected peak value of counter-electromotive force of trapezoidal wave plus a proper constant is as a reference input for the voltage reduced chopper. The input setting for the said chopper is adjusted in real time based on variety of rotation speed of motor. The invention lowers iron loss in dynamic raising speed of the DC motor and torque ripple caused by PWM effectively, as well as reduces armature reaction and electromagnetic interference, raises dynamic characteristic and operating efficiency of the flywheel drive system. The invention possesses important application value for spacecraft with limited electric energy.

Description

Technical field [0001] The invention relates to a permanent magnet brushless DC motor control system, which is used for the control of the driving parts of the attitude control actuators of spacecraft such as satellites and space stations. Background technique [0002] The driving components of the attitude control actuators of spacecraft such as satellites and space stations require low power consumption in order to make full use of the limited power energy of the spacecraft. The driving components of the current attitude control actuators are directly added to the three-phase inverter bridge composed of power devices by a steady DC current, and the position signal, speed signal and current signal are sampled by the digital controller, and the pulse width modulation PWM is adopted. The modulation method regulates the speed of the motor, especially for the permanent magnet brushless DC motor with small armature inductance. Due to the constant power supply voltage of the DC ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/18H02P6/182
Inventor 房建成王志强刘刚田希晖樊亚洪孙津济
Owner BEIHANG UNIV
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