| 摘要 |
A control system of an electric motor powered by a battery comprises an inverter circuit that inverts a direct current fed from the battery to an alternating current fed to the electric motor; and an output controlling circuit that controls an output of the inverter circuit to adjust operation of the electric motor. The output controlling circuit includes a first section that detects a magnitude of output voltage of the battery; a second section that, based on the detected output voltage, derives an unloaded voltage that would be outputted from the battery when the battery is unloaded; a third section that, based on the unloaded voltage, looks up an appropriate current command from maps that store various current commands with respect to operation condition of the motor; and a fourth section that, based on the looked up current command, controls the output of the inverter circuit.
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