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Continue to ChatDC Motor Speed Control by Variation of Current through the Field Winding https://www.electricalengineering.xyz/dc-motor-speed-control-by-variation-of-current-through-the-field-winding/
DC Motor Speed Control by Variation of Current through the Field Winding https://www.electricalengineering.xyz/dc-motor-speed-control-by-variation-of-current-through-the-field-winding/