Title:
CONTROL DEVICE, CONTROL METHOD, SHAPING DEVICE, AND SHAPING METHOD FOR FIXED DISPLACEMENT PUMP
Document Type and Number:
Japanese Patent JP3892073
Kind Code:
B2
Abstract:
PURPOSE: To reduce delivery pressure changes of a fixed displacement pump despite of a simple and inexpensive structure, by amplifying output signals of a filter circuit which passes only frequency signal components of the delivery pressure changes originated from the fixed displacement pump, converting the amplified output signals into binary values, and selecting a voltage value according to the binary signals.
CONSTITUTION: A pressure gage 3 is provided downstream from the delivery opening of a fixed displacement pump 2 which is driven by a motor 1 and only frequency signal components of delivery pressure changes originated from the fixed displacement pump 2 out of its output signals are made to pass through a filter circuit 4. The signals passed through the filter circuit are amplified 5 and then compared with a prescribed reference voltage in a comparison circuit 6 so as to be converted into binary values and voltage values (b), (c) (b>c), which are set in an additional value set circuit 8, are selected and output according to the binary signals by a selector 9. Next, the output voltage of the selector 9 and the output voltage (a) of a rotation speed set circuit 7 are added 10, and the output after addition is output 11 to a motor 1 by converted into a voltage value or a current value drivable of the motor.
Inventors:
Fukuda Zenpei
Amagawa Takeaki
Okamoto Shoji
Kazumi Nakamura
Makoto Muro
Amagawa Takeaki
Okamoto Shoji
Kazumi Nakamura
Makoto Muro
Application Number:
JP5188296A
Publication Date:
March 14, 2007
Filing Date:
March 08, 1996
Export Citation:
Assignee:
Mitsubishi Rayon Co., Ltd.
International Classes:
F04B49/06; F04C14/00; F04B11/00; F04B13/00; F04C14/08; F04C15/06; (IPC1-7): F04B49/06; F04B11/00; F04B13/00; //F04C15/04
Domestic Patent References:
| JP5770975A | ||||
| JP58105028A | ||||
| JP3260404A | ||||
| JP267478A |
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama
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