Soft start motor control using back-EMF

Details Soft start motor control using back-EMF Soft start motor control using back-EMF

2008-04-16

2010-12-07

Leykin, Rita (Department: 2837)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

C361S023000, C361S031000, C318S430000, C318S268000, C318S772000, C318S784000, C323S208000, C323S209000, C323S276000

Reexamination Certificate

active

07848067

ABSTRACT:
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 also include operating the DC motor in a second mode including applying the back-EMF across the relay coil to maintain the relay in a closed configuration when the back-EMF is equal to or above the predetermined voltage.

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