Hybrid working machine

摘要

A motor generator operates as a generator and a motor. A converter switches a discharge state where power is supplied from a capacitor to the motor generator and a charge state where the capacitor is charged by the power generated from the motor generator. Electric power that is output from the capacitor in the discharge state and electric power that is input to the capacitor in the charge state are controlled. A capacitor voltmeter measures a terminal-terminal voltage of the capacitor. A capacitor ammeter measures charge/discharge current of the capacitor. The measurement result is input from the capacitor voltmeter and the capacitor ammeter to a controller. The controller controls the converter based on the measurement result.

主权项

1. A hybrid working machine comprising:
a capacitor; a motor generator operating as a generator and a motor; a converter capable of switching a discharge state where power is supplied from the capacitor to the motor generator and a charge state where the capacitor is charged by the power generated from the motor generator, and controlling electric power that is output from the capacitor in the discharge state and electric power that is input to the capacitor in the charge state; a capacitor voltmeter measuring a terminal-terminal voltage of the capacitor; a capacitor ammeter measuring charge/discharge current of the capacitor; and a controller receiving a measurement result from the capacitor voltmeter and the capacitor ammeter, and controlling the converter based on the measurement result, wherein the controller determines an appropriate range of the input/output power of the capacitor based on the measurement result by the capacitor voltmeter and the capacitor ammeter, and controls the converter so that the input/output power of the capacitor does not depart from the appropriate range, and wherein the controller determines a mechanical power to be generated by the motor generator so that the input/output power of the capacitor does not depart from the appropriate range based on a requirement output of the motor generator, and controls the motor generator to output the determined mechanical power.