Control unit for three phase brushless motor, comprises compensation section which decides if the three phase currents due to electromagnetic energy have vanished and measures the actual currents

摘要

The control unit (3) includes a compensation unit (4) which receives information from the invertor (31) supplying the motor (1) currents and also the pulse width modulation unit (32). The compensation unit decides if the motor currents due to accumulated electromagnetic energy have dissipated and if so measures the actual currents and uses the determined differences to correct the zero deviations in the means of measurement An INDEPENDANT CLAIM is also included for: A motor system which includes pulse width modulation control of invertors and a compensation section to correct current zero point errors