Brake for electric rolling stock at suppressed speed running

Abstract

Abstract PURPOSE: To keep a suppressed equilibrium speed constant despite the change in a wheel diameter, by using a function generator circuit of simple construction. CONSTITUTION: The conversion output of a rotational-frequency-to-voltage conversion circuit 1, which changes the wheel rotational frequency signal of a speed transmitter 2 into a voltage signal, is applied to a multiplier 3. The change coefficient signal of a wheel diameter change coefficient circuit 4 is applied as a multiplying number to the multiplier 3. The multiplication output of the multiplier is supplied to a function generator circuit 5. A motor current command corresponding to real speed can be picked out from the output terminal of the fucntion generator circuit 5. The coefficient output of the vehicle wheel diameter change coefficient circuit 4 is multiplied by a constant signal in a multiplication circuit 6 and multiplied further by a current command signal in another multiplication circuit 7. The product of the final multiplication is transmitted as a motor current command. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Masashi Naruto
• 👤 Susumu Yomo

Bibliographic Details