| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor driving device which charges back or discharges accumulated power with precision. <P>SOLUTION: If the voltage difference Vcp-Vb between the voltage Vcp from a voltage sensor 13 and the voltage Vb from a voltage sensor 10A is equal to or above a predetermined value α, a controller 30 for the motor driving device 100 generates a signal PWB1 and outputs the signal to a stepup converter 12. Consequently, the controller controls the stepup converter 12 so as to charge power accumulated in a capacitor C2 back to a direct-current power supply B. If the voltage difference Vcp-Vb is less than the predetermined value α, the controller 30 generates signals PWMD11 and 12 and outputs them to inverters 14 and 31, respectively. As a result, the controller controls the inverters 14 and 31 so as to discharge power accumulated in the capacitor C2 to alternating-current motors M1 and M2. <P>COPYRIGHT: (C)2004,JPO |
