发明名称 |
Load dependent variable speed hydraulic unit |
摘要 |
There is provided an autonomous inverter-driven hydraulic unit in which a command pressure and command flow rate do not need to be inputted from outside and a pressure and flow rate can be autonomously controlled without requiring any input signal wire. A target horsepower calculation unit 25 of a controller 11 judges which of a plurality of regions a point representing a present operating state belongs to and calculates a target horsepower represented by a point on a target pressure-flow rate characteristic line based on the present pressure and present flow rate. A comparison unit 28 calculates a deviation of this target horsepower and a present horsepower received from a present horsepower calculation unit 26, inputs a control signal representing this deviation to the inverter 3 and controls a rotational number of a variable-speed motor 2 so that the present horsepower coincides with the target horsepower.
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申请公布号 |
US6537032(B1) |
申请公布日期 |
2003.03.25 |
申请号 |
US20010856664 |
申请日期 |
2001.05.24 |
申请人 |
DAIKIN INDUSTRIES, LTD. |
发明人 |
HORIUCHI HITOSHI;NAKATSUJI JUN |
分类号 |
F04B49/06;F04D15/00;H02P27/06;(IPC1-7):F04B49/00 |
主分类号 |
F04B49/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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