Working machine
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United States of America Patent
Stats
-
Jan 28, 2014
Grant Date -
May 24, 2012
app pub date -
Nov 17, 2009
filing date -
Nov 18, 2008
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Provided is a working machine capable of decreasing a voltage of a DC busbar (DC bus) with a configuration suppressing a degradation in reliability. A hybrid type construction machine as a working machine includes: a DC bus which is connected to a rotation motor via an inverter circuit, a battery which is connected to the DC bus via a step-up/step-down converter and a switch, a controller which drives the inverter circuit and the step-up/step-down converter, a cooling liquid circulating system which includes a pump motor, and an inverter circuit which is connected to the DC bus and driving the pump motor. The controller includes a mode used for decreasing the voltage of the DC bus, and in that mode, the switch enters a disconnection state and the inverter circuit is operated to consume electricity in the pump motor.
First Claim
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 14 Citation Count
- B60W Class
- 0 % this patent is cited more than
- 11 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jul 28, 2025 |
