| 摘要 |
<p>PURPOSE:To provide a circuit for inspecting the state change of a motor with a one-piece circuit by utilizing a backward induced voltage which is generated at an armature coil winding. CONSTITUTION:The circuit is provided with a display lamp P and transistors Q1 and Q2 and an input terminal T and a selection switch S. A resistor R1 and the transistor Q1 are connected to the display lamp P, resistors R2 and R3 are connected to the transistor Q2, a capacitor C1 is connected to a node N1. and a circuit including the transistor Q2 is connected to the DC connection part of the display lamp P and the transistor Q1 in parallel. A backward induced voltage which is generated at an armature coil winding is input to a terminal T and a capacitor C2 and a plurality of resistors are connected. A switch S is provided with quick-acting switches S1 and S2 one of them is connected to the base terminal of the transistor Q1 and the node N1 and then a terminal A is connected to a terminal A'. The other is connected to a resistor R5 and the base terminal of the transistor Q2. The switch S is set as shown by a solid- line position when detecting the rotation according to the stop of the motor and a selection switch part and terminals B and B' are connected when detecting stop from the rotation of the motor.</p> |
