| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the energy efficiency of an electric working machine by reducing the power consumption in an unloaded state. <P>SOLUTION: A voltage conversion part 103 increases the power from a battery 40 to act on a motor 50 by controlling a signal value input from a voltage control part 104 to be a target value. A control part 108 determines whether or not the motor 50 is in the unloaded state in which a load on the motor 50 is small based on an electric current distributed to the motor 50. If the control part 108 determines that the motor 50 is in the unloaded state, the control part 108 transmits a control signal so that the signal value output from the voltage control part 104 to the voltage conversion part 103 is larger than when the motor 50 is not in the unloaded state to reduce the voltage to be output from the voltage conversion part 103 to the motor 50 side. <P>COPYRIGHT: (C)2012,JPO&INPIT |
