Drive control device for brushless motor

摘要

The drive control arrangement includes a device which controls a current supplied to the excitation coils (U, V, W) of the motor (1) under application of a drive pulse. A device for a pulse width modulation (PWM) is provided, which determines a pulse width of the drive pulse under application of a control signal which adjusts a rotational speed of a rotor (3) of the motor. A device for a pulse width correction is provided, which corrects the pulse width of the drive pulse at a variation of a source voltage, to ensure that the average voltage of the drive pulse is held on a constant value, especially at an adjusted rotational speed.