Static System for the Automatic Control of Electric Drive

摘要

Another paper reviewed the circuitry for automatically controlling the processes involved in starting and braking direct and alternating current motors by relay-contact equipment. Speed regulation was accomplished by inserting resistance in the motor armature or rotor circuits. But it is known that this speed regulation method causes a deterioration in mechanical characteristics and motor speed to become unstable, depending on the load. When the drive is required on the one hand to provide broad and smooth speed regulation, and on the other to maintain an assigned speed, regardless of load, recourse is had to closed automatic speed regulation systems using various types of electrical machines, and magnetic, electronic, and semiconductor components. Drives, the bases of which are contactless magnetic and semiconductor components, and particularly controlled tubes (thyratrons), have an especially good future.