| 摘要 |
PURPOSE:To reduce the irregularity in the lifetime of a relay and to obtain a drive device for a relay having high reliability by providing a relay contact which controls the energization of a load connected to an AC power source, and setting the closing and opening phase of the relay contact to a random phase. CONSTITUTION:An AC power source 2 half-wave rectifies an AC power source 1, and supplies a voltage converted to a constant value by a Zener diode 13 to a relay drive signal generator 5 and an unstable voltage to relay drive means 6. A zero voltage pulse generator 4 generates a pulse by detecting the vicinity of the zero volt of the power source 1. This pulse is processed by the generator 5 to form a pulse having a random phase, and outputted to the means 6. A relay coil 18 is operated by a pulse having the random phase, and the relay contact 8 is closed. |
