To provide a low price motor control apparatus which reduces offset of a load current of motor to execute effective weal magnetic field control.
A current command signal generating means 5 outputs a phase leading angle proportional digital address value β corresponding to a current norm command I and a current phase command, and an address generating means 4 outputs a rotor position proportional digital address value θ in accordance with an output of an encoder 2. The rotor position proportional digital address value θ and the phase leading angle proportional digital address value βare added in an address digital adding means 6. A waveform data of a q-axis waveform memory means 7 is read using an addition result θ' as the address input, and it is then converted into current command signals iu', iw' in the accumulation digital/analog converting apparatus with reference to the current norm command I in order to realize the drive through pulse width modulation control of the motor I.
ICHIUMI YASUFUMI
TAMAKI SATOSHI
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