Pumps – Condition responsive control of pump drive motor – By control of electric or magnetic drive motor
Patent
1996-10-16
2000-04-18
Freay, Charles G.
Pumps
Condition responsive control of pump drive motor
By control of electric or magnetic drive motor
417 53, 417 45, 4174235, 4174236, F04B 4906, F04B 3504
Patent
active
060507802
ABSTRACT:
A high speed compressor (10) includes a gear box (11), two compressing units (12, 13) supported on opposite side walls of the gear box (11) and a bull gear (32) rotatably placed in the gear box (11). Each compressing unit includes a scroll (15, 16) and an impeller (18, 19) rotatably housed in the scroll (15, 16). The impellers (18, 19) share an impeller shaft (22) extending into the gear box (11). A pinion gear (23) is mounted on the impeller shaft (22) such that it engages with the bull gear (32). A drive shaft (30) extends from the bull gear (32) out of the gear box (11) along a center axis of the gear box (11). An induction motor (35) is connected with the drive shaft (30) for causing the impellers (18, 19) to rotate by way of the bull gear (32) and the pinion gear (23). An inverter (40) is connected with the induction motor (35) at its one end and with a commercial power source (43) at the other end for converting an A.C. power from the commercial power source (43) into an A.C. power having a desired frequency and feeding it to the induction motor (35) for driving of the induction motor (35).
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Patent Abstracts of Japan, vol. 8, No. 154 (M-310) [1591], Jul. 18, 1984 (JP 59 049394).
Funabashi Shunichi
Hasegawa Kazumitsu
Majima Kanji
Ozaki Shin-ichi
Yamada Kiwamu
Freay Charles G.
Ishikawajima-Harima Heavy Industries Co. Ltd.
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