Controlled current inverter and motor control system

Details Controlled current inverter and motor control system Controlled current inverter and motor control system

H - Electricity

02

P

318/103

H02P 27/04 (2006.01) H02P 3/18 (2006.01)

Patent

CA 1145391

21 DSH 2473 ABSTRACT OF THE DISCLOSURE A controlled current inverter system forms the basis of an a.c. motor drive system for furnishing the motor load with a variable frequency, variable magnitude a.c. current from an inverter which is supplied from a variable d.c. current source by way of a d.c. link including an inductor. Torque is the control parameter employed in the system and the motor speed and torque are controlled through the control of motor flux and motor current, by maintaining a controlled ratio between the direct and quadrature motor currents, through separate control paths to the d.c. source and the inverter. A third control path functioning on the difference between the desired and actual motor flux serves as a modifier to the main control paths to improve overall operation and control. Means associated with the basic control paths provide for dynamic braking of the motor.

331769

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