MOTOR CONTROLLER, AND ELECTRIC TOOL HAVING ABOVE DESCRIBED CONTROLLER Russian patent published in 2013 - IPC H02P6/12 

FIELD: electricity.

SUBSTANCE: motor controller includes a processor that randomly sends an actuation signal either to a switching element of upper arm, or to a switching element of lower arm based on the position determined by the position sensor, gate control devices supplying the control voltage to gates of switching elements by shifting the level of actuation signal from the processor to the switching element of upper arm, and capacitor in positive feedback chain, which is formed with possibility of charging when the switching element of upper arm is switched off, and acting as a voltage source for the gate control device when the switching element of upper arm is switched on. The processor is formed to reduce the set load coefficient when the set load coefficient is equal to or exceeds the specified value (for example 80 percent), and motor rotation position does not change for the first set time interval.

EFFECT: avoiding burnout of the switching element even at the motor interlocking.

7 cl, 8 dwg