Small armature inductance high-speed permanent-magnet brushless DC motor control system without position sensor

A technology of DC motor and small armature inductance, which is applied in the direction of electronic commutation motor control, control system, single motor speed/torque control, etc., and can solve the problem that the commutation signal cannot be continuously detected

Inactive Publication Date: 2006-09-06
BEIHANG UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem solved by the present invention is to overcome that when the existing position sensorless control technology is applied to a small armature inductance high-speed permanent magnet brushless DC motor, it is impossible to obtain accurate rotor position information at an excessively high speed, so as to perform effective commutation Control shortc

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  • Small armature inductance high-speed permanent-magnet brushless DC motor control system without position sensor
  • Small armature inductance high-speed permanent-magnet brushless DC motor control system without position sensor
  • Small armature inductance high-speed permanent-magnet brushless DC motor control system without position sensor

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Embodiment Construction

[0037] like figure 1 Shown is a small armature inductance high-speed permanent magnet brushless DC motor position sensorless control system, in which the current sensor 2 detects the power bus current, and sends the sensor signal to the filter circuit for low-pass filtering and removal of PWM chopping frequency interference, after filtering The final signal is sent to the digital controller 8 for sampling, and the current sampling value is used for the speed control of the permanent magnet brushless DC motor 4. After the internal control algorithm of the digital controller 8, six channels of PWM signals are output to the three-phase inverter bridge 3. The magnetic brushless DC motor 4 performs phase commutation and speed regulation, and the limiting multiplexer 5 limits the non-conducting phase voltage and outputs it. The program-controlled amplifying comparator 6 will compare its corresponding amplified value with the voltage reference value according to the current motor spe...

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Abstract

Small armature induction high-speed permanent magnetism brushless D.C. motor non - position transducer control system is composed of amplitude limiting multiplepath switching unit, program control amplifier comparator, electric isolation circuit, current transducer, filter circuit, small armature induction permanent magnetism brushless D.C. motor, triphase inversion bridge and digital controller etc part. When PWM has larger duty ratio, comparing no conduction phase terminal voltage with supply voltage reference value, outputting phase conversion signal, when PWM has less duty ratio, comparing no conduction phase terminal voltage with armature winding midpoint voltage, outputting phase conversion signal, when armature winding and inversion bridge is disconnected due to fault, said digital controller still capable of obtaining motor rotor positional information. The present invention effectively solves phase conversion controlled problem, raising driving parts reliability and precision.

Description

technical field [0001] The invention relates to a position sensorless control technology of a small armature inductance high-speed permanent-magnet brushless DC motor, which can be used as a highly reliable and high-precision control method for 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 high reliability and high precision to ensure the stable and efficient operation of the spacecraft. At present, the driving components used in attitude control actuators generally adopt permanent magnet brushless DC motors with position sensors. The control system of the permanent magnet brushless DC motor obtains the position signal of the rotor through the position sensor, and performs commutation and speed regulation according to the position signal. However, since there are many wir...

Claims

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Application Information

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IPC IPC(8): H02P6/18H02P6/08H02P6/182
Inventor 房建成刘平刘刚张庆荣孙津济王志强
Owner BEIHANG UNIV
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