Proportional plus integral servo-reversible speed control

摘要: A proportional plus integral servo-reversible speed control for use in a system driving load either forward or reverse direction of travel at desired output speed. The includes handle providing command voltage having magnitude to the and inversely direction. pulse pickup device frequency converter provide actual speed, being applied both an inverting noninverting amplifier. is as feedback circuit from amplifier sensed closed loop one direction, down through zero up opposite responsive gated thereto generate signal which maintains constant.