| 摘要 |
PURPOSE:To efficiently design in a free shape by composing a bridge circuit of an internal resistance of a DC motor, three resistors provided separately and a reference power source. CONSTITUTION:A bridge circuit is composed of a DC motor 28 and resistors 3, 31, 32. a comparator 25 compares a reference voltage produced by dividing a reference voltage source 26 by a variable resistor 34 with a counterelectromotive force Ea of the motor 28, and supplies a control signal to a transistor 33 for driving the motor. Thus, a speed controller of a high performance DC motor is composed merely by holding the ratio of the resistors connected in series constant, and can be designed in a free shape. |
