| 摘要 |
PROBLEM TO BE SOLVED: To cope with a wide range of rotational speeds in drive control of motors by shunt resistance, to detect an overcurrent without a hitch, and to smoothly a shift to power running from regeneration.SOLUTION: An inverter device includes a relay 16 for controlling regeneration of power generated when the motor 6 operates as a generator to a battery 4. A control unit 11 estimates a rotor position of the motor 6 by a current value detected by the shunt resistance 2 for bus currents, when closing the relay 16 for regeneration. The current values detected by shunt resistors 12, 13 for phase currents are used to estimate the rotor position when the control unit opens the relay 16 to prevent regeneration. |
