| 摘要 |
PROBLEM TO BE SOLVED: To provide a detector for a drive unit, capable of precisely detecting a disconnection in a motor feeder line.SOLUTION: A full-bridge circuit is formed from switching elements FET1-FET4 and is connected with a motor 1 through motor feeder lines 4a, 4b. When all the switching elements FET1-FET4 are off, a power supply +V is fed to resistors R1-R4. A first detection voltage VMis detected with a division ratio of the resistor R1 to the resistor R2 and a second detection voltage VMis detected with a division ratio of the resistor R3 to the resistor R4. When an absolute value of a difference between the first detection voltage VMand the second detection voltage VMis equal to or larger than a predetermined value, the motor feeder lines 4a, 4b are determined to be disconnected. |
