INSTANTANEOUS POWER FLOATING FRAME CONTROLLER

摘要

The present invention relates to a method of controlling a power converter ( 20 ) of a synchronous machine system ( 10 ), the method comprising sampling phase-current values between the power converter ( 20 ) and the synchronous machine ( 30 ); selecting a reference frame; regulating a current vector to align with the selected reference frame, the selected reference frame having a direct-axis component and a quadrature-axis component; estimating rotor speed and position as a function of instantaneous power; adjusting the selected reference frame, based on estimated rotor position, to synchronize the selected reference frame with a magnetic axis of the rotor, thereby generating a synchronized floating frame; and applying the synchronized floating frame to control the power converter ( 20 ). The present invention also related to a power converter controlling apparatus ( 100 ) for controlling a power converter ( 20 ) of a synchronous machine system ( 10 ) without use of a machine position sensor.