| 摘要 |
An emergency driving device of a three-phase induction motor is provided to prevent interruption of an operation by continuously driving a three-phase induction motor by a single phase AC voltage in a malfunction of an inverter. A first phase coil(142), a second phase coil(144), and a third phase coil(146) of a three-phase induction motor(140) are Y-connected. A DC voltage conversion part(110) converts a single phase AC power source(100) into a DC voltage. A control part(120) controls a driving of the three-phase induction motor. A switching part(130) drives the three-phase induction motor by switching the DC voltage converted by the DC voltage conversion part according to a control of the control part. A single phase AC power source is contacted in a movable terminal of a first switch(200) and a second switch(202). One side fixing terminals(a1, a2) of the first switch and the second switch are contacted in an input terminal of the DC voltage conversion part. The other side fixing terminals(b1, b2) of the first switch and the second switch are contacted in the other side fixing terminals(b3, b5) of a third switch(204) and a fifth switch(208). The other side fixing terminal of the second switch is contacted in the other side fixing terminal(b4) of a fourth switch(206) through a capacitor(212). An output terminal of the switching part is contacted in one side fixing terminals(a3, a4, a5) of the third switch, the fourth switch, and the fifth switch. |
