| 摘要 |
PURPOSE:To reversely control a motor inexpensively in a simple structure with excellent durability and weather resistance by providing rotating speed detection value polarity adding means for adding a condition for setting the output of a motor driver to zero from an output of a rotating speed sensor, a target rotating polarity and rotating polarity based on the output signal of control means. CONSTITUTION:A target rotating speed signal 5s is applied by target rotating speed deciding means 5. The signal 5s is sent to a subtracter 7 and rotating speed detection value polarity adding means 6. The subtracter 7 subtracts the target rotating speed signal from a polarity rotating speed signal 6s from the means 6, and outputs a deviation signal 7s. The signal 7s is input to motor control means 4, which outputs an output signal 4s responsive to the signal 7s to a motor driver 3 and the means 6. The driver 3 energizes a DC motor 1 in response to the signal 4s from the means 4, and rotates it. The rotating speed of the motor 1 is detected by a rotating speed sensor 2. |
