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Patent Searching and Data


Title:
CONTROL METHOD FOR VARIABLE SPEED ELECTRIC MOTOR SYSTEM AND CONTROL DEVICE FOR VARIABLE SPEED ELECTRIC MOTOR SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/037940
Kind Code:
A1
Abstract:
The present invention relates to a control method for a variable speed electric motor system provided with an electric device (50) and a planetary gear transmission device (10), said electric device (50) being provided with: a constant speed electric motor comprising a constant speed rotor (52) connected to a constant speed input shaft of the transmission device; and a variable speed electric motor comprising a variable speed rotor (72) that is connected to a variable speed input shaft of the transmission device and that is capable of controlling the rotational speed in the forward direction and the reverse direction, the range between the minimum rotational speed in the forward direction and the minimum rotational speed in the reverse direction being an uncontrollable range in which control is not possible. The control method for a variable speed electric motor system includes: a step in which an instruction for the rotational speed of an output shaft is received; a step in which the variable speed electric motor performs calculation of a rotational speed on the basis of the rotational speed of the output shaft; a step in which it is determined whether the rotational speed resulting from the calculation is in the uncontrollable range; and a step in which a forward direction minimum rotational speed instruction for driving the variable speed electric motor at the minimum rotational speed in the forward direction and a reverse direction minimum rotational speed instruction for driving the variable speed electric motor in the reverse direction at the minimum rotational speed are executed repeatedly in an alternating manner when the rotational speed resulting from the calculation is in the uncontrollable range.

Inventors:
OKAMOTO Yoshiyuki (6-22 Kan-on-Shin-machi 4-chome, Nishi-ku, Hiroshima-sh, Hiroshima 53, 〒7338553, JP)
MORI Yasushi (6-22 Kan-on-Shin-machi 4-chome, Nishi-ku, Hiroshima-sh, Hiroshima 53, 〒7338553, JP)
Application Number:
JP2015/075183
Publication Date:
March 09, 2017
Filing Date:
September 04, 2015
Export Citation:
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Assignee:
MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION (34-6, Shiba 5-chome Minato-k, Tokyo 14, 〒1080014, JP)
International Classes:
F16H3/72; F16H61/02; H02P5/747
Foreign References:
JPS6087698A1985-05-17
JP2014217118A2014-11-17
JP2015033913A2015-02-19
JP4472350B22010-06-02
Other References:
See also references of EP 3330569A4
Attorney, Agent or Firm:
MORI Ryuichirou et al. (1-9-2, Marunouchi Chiyoda-k, Tokyo 20, 〒1006620, JP)
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