| 摘要 |
<P>PROBLEM TO BE SOLVED: To detect a DC voltage being applied to an inverter circuit inexpensively and accurately. <P>SOLUTION: A control unit 5 divides a DC voltage Vg inputted from a generator 2 by voltage division resistance elements R1, R2 and R3 having known voltage division ratios, calculates the potential difference ¾GND1-GND2¾ between the ground potential GND1 on the side of the control unit 5 and the ground potential GND2 on the side of an inverter circuit 3 based on divided voltages VgAD1 and VgAD2 and calculates the DC voltage Vg using the potential difference ¾GND1-GND2¾ thus calculated. <P>COPYRIGHT: (C)2010,JPO&INPIT |
