| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the capacity of a resistor for consuming a regenerative power, and reduce the installation space. <P>SOLUTION: In the elevator control device, a regenerative control circuit 4 applies the voltage between a base and an emitter of a semiconductor switching element 5 when the voltage value between current output lines exceeds the reference value predetermined by the effect of the regenerative power. Then, the semiconductor switching element 5 becomes an ON state and the regenerative power is consumed by the resistor 8. When the semiconductor switching element 5 becomes the ON state, a cooling fun drive circuit 9 obtains the source power according to the generation of the voltage between a collector and the emitter of the semiconductor, and supplies it to a cooling fan motor 10. The fun 11 is driven to rotate thereby. Therefore, it is not necessary to newly provide the power circuit for driving to rotate the fan 11. The installation space of whole of the power conversion circuit can be reduced. <P>COPYRIGHT: (C)2007,JPO&INPIT |
