| 摘要 |
PURPOSE:To maintain the rotating speed of a brushless DC motor at a predetermined value irrespective of temperature rise by correcting the output of a motor drive circuit in response to a deviation between the temperature in a case and a set temperature. CONSTITUTION:An actual temperature in a body case of a brushless DC motor 18 is detected by a temperature detection circuit 22, and the output is input to a correction circuit 23. The correction circuit 23 compares the actual temperature detected by the detection circuit 22 with a set temperature, and corrects the output of a motor drive circuit 16 in response to the deviation of both. The motor 18 is driven by the corrected output. |
