| 摘要 |
An image forming apparatus (1) includes: a light source (15) that emits a light beam; a photosensitive member (10); a brushless motor (33) including a stator (35) and a rotor (36); a rotary polygon mirror (16) rotated by the brushless motor (33); an energization switching unit (37A) that turns on/off energizations of the coils; a voltage detecting unit (39) that outputs a detection signal based on induced voltages generated in coils of the stator by rotation of the rotor; and a motor controlling unit (38) that controls the turning on/off of the energizations by the energization switching unit (37A) based on the detection signal. In a non-image forming period after one image forming operation, the motor controlling unit performs a low-speed process where the motor controlling unit maintains a rotation speed of the brushless motor at a speed, which is lower than a speed in the image forming operation, and at which the induced voltages are detectable by the voltage detecting unit. |
