Testing method of electrical zero position of randomly mounted brushless DC (Direct Current) motor of rotary transformer

Abstract

The invention belongs to a testing method of a control zero position of a motor, and particularly discloses a testing method of an electrical zero position of a randomly mounted brushless DC (Direct Current) motor of a rotary transformer. The testing method comprises the steps of: (1) roughly adjusting the zero position of the brushless DC motor at a low voltage, to be specific, setting a current and a voltage value of a power source, measuring a voltage waveform of the motor by an oscilloscope, writing parameters into a motor driver initially by an upper computer, judging whether the motor runs normally and the rotating speed is positive, and accordingly measuring a phase difference Xn between a voltage switching time difference deltaTn and a rotation electric period Tn of the motor; (2) finely adjusting the zero position of the brushless DC motor at a high voltage, to be specific, setting a rated voltage of the power source, monitoring the running state of the motor by the upper computer, (2.3) measuring the voltage waveform of the motor by the oscilloscope, and (2.4) adjusting a control parameter to determine the current minimum value of the motor and finish the zero position testing of the motor. The testing method of the electrical zero position of the randomly mounted brushless DC motor of the rotary transformer can realize precise positioning and control of the motor and realize efficient drive control of the brushless DC motor.

Description

technical field [0001] The invention belongs to a method for testing the zero position of motor control, in particular to a method for testing the electrical zero position of a brushless DC motor randomly installed in a resolver. Background technique [0002] The brushless DC motor and drive control are used for the energy and power of the electro-hydraulic servo mechanism for rocket attitude control. Its work efficiency and reliability directly determine the success or failure of the rocket's flight. The reliability of the brushless DC motor drive control is a necessary prerequisite for the successful flight of the rocket. . [0003] General brushless DC motors use Hall sensors as position detection means. The installation position is fixed, and there is no problem of zero position uncertainty. However, its operating temperature range is relatively low, generally only up to 85°C, and a few products can reach 125°C. , the price is very expensive, not suitable for industrial...

AI Technical Summary

Problems solved by technology

[0006] At present, the method of mechanical power-on rotation positioning is generally used for resolver zero adjustment. However, due to the cogging effect of the motor and the large positioning torque, only the approximate position of the resolver zero position can be achieved, and there is a certain angle deviation.

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