Method and apparatus for warm up control of autonomous...

Details Method and apparatus for warm up control of autonomous... Method and apparatus for warm up control of autonomous...

2007-04-24

2007-04-24

Lazo, Thomas E. (Department: 3745)

Power plants

Pressure fluid source and motor

Condition responsive control means responsive to, or...

C060S456000, C091S419000

Reexamination Certificate

active

10534698

ABSTRACT:
An apparatus for warm up control of an autonomous inverter-driven hydraulic unit has a warm up control section and a switch section. The warm up control section performs a predetermined process using a current speed and current pressure as input information and outputs a first switch command. The switch section is controlled by the first switch command so as to control on/off of power supplied to a fan motor. The apparatus causes an oil temperature to quickly rise to a level where a hydraulic unit driven by a hydraulic pump can work in an optimum condition.

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