| 摘要 |
PURPOSE:To achieve a positive starting by retaining a voltage above the return voltage after the start, when it is applied on a drive coil of a voltage relay to separate a starting condenser. CONSTITUTION:When an operation switch 7 is closed, current flows through a main coil 1 and an auxiliary coil 2 of a motor, an operation condenser 3 and a starting condenser 6 to start the motor. As soon as a terminal voltage of the auxiliary coil 2 reaches a set value, a voltage relay 5 turns on to change a contact 5c over to a contact 5a. This separates the starting condenser 6 while permiting the short-circuiting of an impedance element 9 connected in series to a voltage relay driving coil 4. Thus, a positive starting can be performed with a single action. |
