A charge accumulating circuit (90) accumulates regeneration power. The charge accumulating circuit includes a DC bus line (110) which is connected to a smoothing capacitor (105), a charge accumulating capacitor (19) with an internal resistance (Rc), and a converter (100) which connects the DC bus line and the charge accumulating capacitor to each other, and performs a charge/discharge operation. The control device (30) changes the OFF state of the first switch to the ON state when the start key (32) is turned on, measures a physical quantity involved with a discharge characteristic of the charge accumulating capacitor, and calculates at least one of the internal resistance and a capacitance (Cc) of the charge accumulating capacitor on the basis of a measurement result.
Hybrid type working machine
Baumaschine des Hybridtyps
Engin de chantier hybride
2016-11-23
Patent
Electronic Resource
English
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / E02F Baggern , DREDGING / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |