Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1990-03-16
1990-12-11
Smith, Jr., David
Electricity: motive power systems
Induction motor systems
Primary circuit control
417 17, 417 53, H02P 748
Patent
active
049773631
ABSTRACT:
In the operation of an A.C. motor by switching the number of poles of the motor or the power sources of different frequencies, switching operating circuit is constructed to automatically switch so that the motor does not overheat by the above-described switching. Thus, the energy of the power sources can be saved.
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patent: 4370605 (1983-01-01), Breznican
patent: 4413218 (1983-11-01), Taylor et al.
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patent: 4434394 (1984-02-01), Kellog et al.
patent: 4437608 (1984-03-01), Smith
patent: 4468171 (1984-08-01), Katsumata et al.
Hirosaki Toshihiko
Takada Nobuharu
Mitsubishi Denki & Kabushiki Kaisha
Smith Jr. David
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