| 摘要 |
PURPOSE:To provide an inverse connection countermeasure circuit causing no electric power consumption in a simple and inexpensive structure by connecting a diode in series to a resistor and in parallel to a switch, and arranging this cathode on the driving device side of a motor driven compressor. CONSTITUTION:A resistor 4 is connected in series to a battery 2. A switch 3 is connected in parallel to the resistor 4. Electric power of the battery 2 is supplied to a driving device 1 through the switch 3 or the resistor 4, and driving control is carried out on an air-conditioning motor-driven compressor 5. The driving device 1 detects input voltage by a means 7, and closes the switch 3 by a control part 6 when the detected input voltage exceeds a prescribed value. In the above-mentioned constitution, a diode 8 is connected in series to the resistor 4 and in parallel to the switch 3, and this cathode is arranged on the driving device 1 side. Thereby, an inverse connection countermeasure circuit causing no electric power consumption can be provided in a simple and inexpensive structure. |
