Patent ID: 6960896

Claim:
A programmable high-speed motor torque controller, comprising: a current-limiting switching controller, for determining whether the real-time current exceeds a current threshold value according to a voltage drop resulted from the current passing through a micro-resistor, when a first electronic gate switch is turned on, the current of the motor flowing downstream of said micro-resistor so as to generate a transient voltage signal corresponding to a transient current, said transient voltage signal being processed and then inputted into a current comparator; a microprocessor controlled by an external signal and producing a corresponding current command according to an internal control program written into said microprocessor, when said microprocessor receives a current/torque command from a user interface, said internal control program determining the frequency and the pulse width of a pulse width modulation generator, which is converted into a voltage-type current command by an outboard circuit and inputted into a current comparator; a current comparator for rapidly distinguishing the difference between the real-time current of the motor and the current command of said microprocessor, wherein the current of the motor is immediately corrected at each switching period so as to largely increase the accuracy and efficiency of the torque control; and a second electronic gate switch controlled by said microprocessor and used as a switch element of the current loop of the motor.