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Speed and phase control system
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Patent number 4,543,516
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Issue date Sep 24, 1985
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Hitachi, Ltd.
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Yasunori Kobori
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Motor control apparatus
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Patent number 4,518,901
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Issue date May 21, 1985
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Hitachi, Ltd.
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Isao Fukushima
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Motor driving circuit
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Patent number 4,494,056
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Issue date Jan 15, 1985
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Hitachi, Ltd.
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Hideo Nishijima
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Phase-lock control device
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Patent number 4,301,395
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Issue date Nov 17, 1981
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Hitachi, Ltd.
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Takashi Furuhata
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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