Electricity: motor control systems inventions

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20090263110 - Soft start motor control using back-emf: A method of controlling in-rush current to a DC motor is disclosed. The method may include operating the DC motor in a first mode including applying back-EMF across a relay coil to maintain the relay in an open configuration when the back-EMF is below a predetermined voltage. The method may... Agent: Caterpillar/finnegan, Henderson, L.L.P.

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