Servo motor speed control principle and how to increase motor speed

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Servo motor speed control principle and how to increase motor speed

Common servo motors are generally permanent magnet DC motors such as DC brushed hollow cup motors. DC motor linear speed-torque characteristics and torque current characteristics, excellent controllability, simple drive and control circuit, drive control current control mode and voltage control two modes. Servo motor control is a voltage control mode, that is, the rotation speed is proportional to the applied voltage and consists of four power switches to form the bipolar drive method of the H-bridge circuit. Pulse width modulation (PWM) technology is a direct current Used to regulate motor supply. The motor speed and rotation direction (forward / reverse) can be controlled by the magnitude and polarity of the voltage. The speed of the motor depends on the magnitude of the average voltage applied to the motor, depending on the duty cycle of the PWM drive waveform (duty cycle is a percentage of the pulse width / period), increasing the duty cycle, motor acceleration, duty Cycle reduction The motor decelerates.

Therefore, it is necessary to increase the speed of the motor: 1, increase the operating voltage of the motor, 2, reduce the resistance of the main circuit of the motor and increase the current; both load torque to achieve with both servo designs You will need to reselect the rudder motor involved.