| 摘要 |
PURPOSE:To smoothly turn the motor without adding a new circuit by a method wherein a voltage which is applied to every winding is made variable in such a way that the rotational speed of every section formed by dividing one cycle of a rotor into a plurality of sections becomes a prescribed value. CONSTITUTION:An apparatus is provided with a microcomputer 9 which divides one cycle of a rotor into a plurality of sections by the position detection signal of the rotor for a commutatorless motor 1, which computes the rotational speed of the individual sections and which variably controls a voltage to be applied to a plurality of windings 1b during one cycle in such a way that the rotational sped becomes a mean value. Then, a control signal which changes over an energization of the plurality of windings 1b on the basis of a positional signal from an input port is output, and a chopping signal which makes variable a voltage to be applied is output. At the same time, one cycle of the motor 1a is divided into a plurality of sections by the position detection signal, the rotational time of the rotor in the individual sections is computed, the difference between the time in the individual sections and the mean value is computed, and the voltage to be applied to the individual windings 1b is made variable according to the difference. As a result, the commutatorless motor can be turned smoothly. |
