| 摘要 |
<p>To provide a heat generation inhibiting circuit for a relay circuit which can reduce the heat generation amount of an exciting coil at the time of operating the relay circuit. A resistor (R1) is provided between an exiting coil (Xc) and the ground, and a diode (D1) is provided between a point p1 and a point p2. An exciting current (Ia) flows on the ground side via the diode (D1) until a relay contact (Xa) is closed immediately after a switch (SW1) is turned on. Thus, a voltage applied to the exciting coil becomes almost same as a power supply voltage (VB), the relay contact can be surely closed. Further, when the relay contact (Xa) is closed, since the exciting current (Ia) flows on the ground side via the resistor (R1), the voltage applied to the exiting coil (Xc) reduces and hence the heat generation amount can be reduced.</p> |
