Optimization of DC Motor Power losses by Controlling the Excitation Current
Abstract
Abstract. Based on the mathematical model of a DC motor with independent excitation, an equation was obtained for the dependence of the total power of electrical energy losses on the active resistance of the armature winding and the excitation winding of a DC motor on the value of the excitation current and on the value of the electromagnetic torque developed by the motor. A formula was also obtained that determines the optimal value of the excitation current at which a DC motor with independent excitation develops the required value of the electromagnetic torque at the minimum value of the total power of electrical energy losses on the active resistance of the armature winding and the excitation winding. A diagram of the dependence of the optimal value of the excitation current on the value of the electromagnetic torque was constructed. A formula was obtained that determines the dependence of the value of the total power of electrical energy losses on the active resistance of the armature winding and on the active resistance of the excitation winding of a DC motor on the value of the electromagnetic torque developed by the motor, at the nominal value of the excitation current and at the optimal value of the excitation current. The dependence diagrams of the total power of electrical energy losses on the active resistance of the armature winding and on the active resistance of the excitation winding of a DC motor on the value of the electromagnetic torque at the nominal value of the excitation current and at the optimal value of the excitation current have been constructed. The mechanical characteristics of a DC motor with independent excitation have been constructed at the nominal value of the excitation current and at the optimal value of the excitation current.
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