Title:
自律形インバータ駆動油圧ユニット
Document Type and Number:
Japanese Patent JP4635282
Kind Code:
B2
Abstract:
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 be controlled without requiring any input signal wire. A target horsepower calculation unit 25 of a controller 11 judges which of regions a, b, c a point (present pressure, present flow rate) 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. Thus, autonomous control is performed so that the present pressure and present flow rate are located on the target pressure-flow rate characteristic line. Therefore, no input signal wire is required and surrounding wiring is simplified.
Inventors:
Horiuchi Hitoshi
Nakatsuji
Nakatsuji
Application Number:
JP27026499A
Publication Date:
February 23, 2011
Filing Date:
September 24, 1999
Export Citation:
Assignee:
Daikin Industries, Ltd.
International Classes:
F04B49/06; F04D15/00; H02P27/06
Domestic Patent References:
| JP60184994A | ||||
| JP5196001A | ||||
| JP10131866A | ||||
| JP11210635A | ||||
| JP11159465A | ||||
| JP2213640A | ||||
| JP7337072A | ||||
| JP60072997U | ||||
| JP48058282A |
Attorney, Agent or Firm:
Aoyama Aoi
Hiroshi Yamazaki
Hiroshi Yamazaki