| 摘要 |
The invention relates to a product in which torque of a motor (20) is continuously generated when a rotation number of the motor (20) is nearly equal to zero (0), since an output voltage is kept at a constant value in accordance with a rotation position of the motor (20), such a condition that currents are concentrated in a specific element are maintained. As a result, a temperature of the specific element is increased, so that there are problems that a temperature fail of an inverter apparatus may readily occur, and thus, lifetimes of elements are lowered. In a power converter of a motor drive apparatus, windings (LU, LV, LW) are energizing-controlled in such a manner that only 1 phase of a switching circuit is pulse-width-controlled when the motor (20) is under motor locking condition. |
