Patent ID: 8450956
Filing Date: 2013-05-28
Classification: H02P

Abstract:
1. An apparatus for controlling operation of an inverter system, the apparatus comprising: a current detector configured to detect a current output by the inverter system to a motor; a d-axis/q-axis current converter configured to convert the current detected by the current detector into a first d-axis current and a q-axis current; a subtracter configured to calculate a difference between a second d-axis current and the first d-axis current, the second d-axis current including a d-axis current sampled during a previous period; a comparative controller configured to multiply a current output from the subtracter by a preset comparative control gain in order to generate a comparative control voltage; and an adder configured to add the comparative control voltage to a torque portion voltage that is responsive to an operation frequency of the motor in order to output an added value to the inverter system as a driving voltage of the motor.