| 摘要 |
<P>PROBLEM TO BE SOLVED: To surely suppress a rush current and a rise of a voltage of a regeneration capacitor by using a circuit which is relatively low in price and easy in mounting. <P>SOLUTION: When suppressing the rise of the voltage caused by the charge of the smoothing capacitor 105 using regeneration power, a DC power supply of a control part 119 which turns on a voltage-absorption switch 109 uses a bootstrap power supply circuit in which a current flows and is formed as shown by a dashed arrow D in Fig. via a bootstrap diode 117 from a control power supply 114. Three power resistors of a power resistor which suppresses the rush current generated at the input of DC input power, a power resistor which discharges accumulated electric charges in order to suppress the rise of the voltage caused by charging the capacitor by a regeneration power and a power resistor which is used in the bootstrap power supply circuit and stabilizes an output voltage of the power supply circuit are made to be common by one power resistor 112. <P>COPYRIGHT: (C)2011,JPO&INPIT |
