Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Running-speed control
Patent
1990-08-29
1992-09-15
Shoop, Jr., William M.
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Running-speed control
318799, 318 70, 36442601, 364807, G03G 1532
Patent
active
051480891
ABSTRACT:
An apparatus and method for controlling the velocity of a motor controls the motor by fuzzy inferential reasoning in a transitional period when the motor is started, changed in speed, reversed or stopped. Such fuzzy control eliminates an increase in the length of the transitional period caused by a limitation in supply current under conventional PLL control and makes possible a rapid transition to a target velocity. A plurality of fuzzy rules are provided and one of these fuzzy rules is selected in accordance with the length of the previous transitional period, thereby suppressing the effects of load fluctuation and the influence of a fluctuation in torque caused by a rise in temperature. Therefore, the length for transitional control of a motor can be shortened and the apparatus can be reduced in size.
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Johnson, "Fuzzylogig", Jul., 1990, all pages, Popular Science.
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Adachi Hideki
Fukada Taisei
Kuroyanagi Satoshi
Miyata Masanori
Nakamura Shin-ichi
Cabeca John W.
Canon Kabushiki Kaisha
Shoop Jr. William M.
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