| 摘要 |
Disclosed is a motor-driving device capable of protecting an inverter from breakdown. First current-protecting section (8) retains reference voltage value Vref1 as a preset value. If the current to be fed into inverter (6) exceeds value Vref1, first current-protecting section (8) shuts off the output of driver (7) and outputs a first warning to driving-signal generator (5) to shut off generating driving signals. This protects inverter (6) from breakdown. Second current-protection section (9) retains reference voltage value Vref2 that is smaller than value Vref1. If the detected current exceeds value Vref2, second current-protecting section (9) outputs a second warning. Receiving the second warning, driving-signal generator (5) immediately stops generating driving signals; however, it resumes output of driving signals after no longer receiving second warning. The structure above protects inverter (6) from breakdown without frequent stops of brushless motor (3). |
