Current limit control circuit

Details Current limit control circuit Current limit control circuit

H - Electricity

02

P

318/103, 341/86

H02P 7/00 (2006.01) B60L 3/00 (2006.01) H02P 5/68 (2006.01)

Patent

CA 1197552

-21- Current Limit Control Circuit Abstract of the Disclosure The invention pertains to an apparatus for controlling current through a motor, including a circuit for generating motor speed command data, a circuit for generating a control signal in response to a maximum value of current through the motor, a programmable data processor for generating pulse trains in response to the command data, and a controllable supplying circuit for coupling and decoupling power to the motor in response to the pulse trains and for decoupling power to the motor in response to the control signal independent of the pulse trains. By decoupling power from the motor independent of the control produced by the data processor, the current limit is achieved even if the data processor malfunctions, contrary to prior apparatus.

443659

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