winch motor Winch motor speed control device

摘要

The present invention relates to the speed control of winch motor using the phase control (PWM) method, and it is necessary to convert the low speed to the high speed for the purpose of the winch motor. It is impossible, and if you use a variable resistor, you have to use the switch at the same time. In order to solve this problem, a port coupler (photo couple) is used in the speed control terminal of the speed control circuit of the phase control method, and the porter coupler (PC1) LED diode is controlled by the current supplied from the charge / discharge unit. The speed is changed by increasing or decreasing the optical semiconductor resistance on the secondary side of the coupler. That is, when the speed control switch 20 is short-circuited, the capacitor C5 of the charge / discharge unit 50 is charged by the DC power supplied from the DC power supply unit 30, and the base current of the transistor Q1 also gradually increases. Increases. As the base current increases, the collector current of Q1 increases, increasing the brightness of the photocoupler LED diodes and gradually decreasing the secondary-side optical semiconductor resistance. Therefore, the resistance of the speed control terminal R8 decreases and the speed is gradually increased. At this time, the speed increase time from the low speed to the high speed is determined by the time constants of the resistor R13 and the capacitor C5 of the charge / discharge unit 50, and thus the increase / decrease speed is adjusted using the semi-fixed resistor R13. Thus there is an advantage that can be flexibly adjusted by simple switch operation.;Phase control, winch, winch motor, PWM, port coupler, photo coupler, LED diode, semi-fixed resistor, optical semiconductor, collector, base