| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve an inexpensive surge-voltage suppression circuit that has high surge-voltage suppression effects without increasing the size. <P>SOLUTION: A surge-voltage suppression circuit 3 suppresses a surge voltage generated in a power supply line between an inverter 1 and a motor 2 when driving the motor 2 by output of the inverter 1. The surge-voltage suppression circuit 3 includes coils 31-1 to 31-3, connected in series to a power supply line between the inverter 1 and the motor 2, and capacitors 32-1 to 32-3 connected in parallel to the coils 31-1 to 31-3. The surge-voltage suppression circuit is provided with an LC parallel resonance circuit whose parallel resonance frequency fc[Hz] is set to the same frequency as that of a fluctuation frequency fs[Hz] of a surge voltage. <P>COPYRIGHT: (C)2009,JPO&INPIT |
