| US 7,610,754 B2 | ||
| Fluid pressure unit and fluid pressure unit control method | ||
| Yoshiyuki Ochi, Osaka (Japan); Yoshimitsu Otani, Osaka (Japan); and Hirokazu Nakamura, Osaka (Japan) | ||
| Assigned to Daikin Industries, Ltd., Osaka (Japan) | ||
| Appl. No. 11/658,023 PCT Filed Jan. 19, 2006, PCT No. PCT/JP2006/300759 § 371(c)(1), (2), (4) Date Jan. 22, 2007, PCT Pub. No. WO2006/082711, PCT Pub. Date Aug. 10, 2006. |
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| Claims priority of application No. 2005-027973 (JP), filed on Feb. 03, 2005. | ||
| Prior Publication US 2008/0034956 A1, Feb. 14, 2008 | ||
| Int. Cl. F15B 9/00 (2006.01); F15B 15/28 (2006.01) | ||
| U.S. Cl. 60—428 [60/431] | 10 Claims |
| 1. A fluid pressure unit comprising:
a fixed displacement fluid pump configured to be driven by an adjustable speed motor to discharge fluid;
at least one actuator for actuating an object to be actuated with a pressure of the fluid discharged from the fluid pump;
and
a controller for, upon the actuator actuating the object to be actuated, imparting a teaching movement to the actuator to
determine an operating range of the actuator based on the number of rotations of the motor and, during subsequent movement
of the actuator to actuate the object to be actuated, rotating the motor at a first speed until a preset deceleration start
point short of the end of movement of the actuator within the determined operating range and then rotating the motor at a
second speed lower than the first speed from the deceleration start point to the end of movement of the actuator .
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