Title:
CONTROL METHOD OF SCREW COMPRESSOR
Document Type and Number:
Japanese Patent JP3916418
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a screw compressor which can control pressure and a delivery amount in a wide range of compressed air while maintaining a delivery pressure of prescribed value or more.
SOLUTION: The highest rotational speed Nmax capable of operating a drive motor 6 with fixed power is calculated from a delivery pressure Pd input by a controller 11, for making a deviation zero between an input prescribed pressure Pc and the delivery pressure Pd, a rotational speed NPID is calculated by PID calculation, relating to an inverter 12 controlling the drive motor 6 driving a compressor main unit 2 in the case of rotational speed NPID < rotational speed Nmax, the rotational speed NPID is output as a rotational speed command N, in the other hand, in except the case, the rotational speed Nmax is output as the rotational speed command N.
Inventors:
Midwest Sea
Hajime Nakamura
Minami Yashiki Masamichi
Tomizawa Makoto
Kazuo Komura
Hajime Nakamura
Minami Yashiki Masamichi
Tomizawa Makoto
Kazuo Komura
Application Number:
JP2001191500A
Publication Date:
May 16, 2007
Filing Date:
June 25, 2001
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
F04C18/16; F04B49/06; F04C28/08; (IPC1-7): F04C18/16; F04B49/06; F04C29/10
Domestic Patent References:
| JP9209949A | ||||
| JP7035079A |
Attorney, Agent or Firm:
Yoshiyuki Kaji
Makoto Suhara
Makoto Suhara
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