(c) Show that the torque-speed characteristic of a series-connected DC motor is given by: KK,V; Taev (RA + Rp + KKpwm)? where Tdev is the torque developed in the machine, Ra is the resistance in armature circuit, RF is the resistance in the field circuit, K is the machine constant that depends on the design parameters of the machine, om is the angular velocity of the rotor, Kp is a constant that depends on the number of field windings, the geometry of the magnetic circuit, and the B-H characteristics of the iron and VT is the voltage applied to the armature.

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(c) Show that the torque-speed characteristic of a series-connected DC motor is given
by:
KK,V?
(RA + Rp + KKpwm)?
Tdev
where Tdev is the torque developed in the machine, RA is the resistance in armature
circuit, RF is the resistance in the field circuit, K is the machine constant that
depends on the design parameters of the machine, om is the angular velocity of the
rotor, Kr is a constant that depends on the number of field windings, the geometry
of the magnetic circuit, and the B-H characteristics of the iron and Vr is the
voltage applied to the armature.
Transcribed Image Text:(c) Show that the torque-speed characteristic of a series-connected DC motor is given by: KK,V? (RA + Rp + KKpwm)? Tdev where Tdev is the torque developed in the machine, RA is the resistance in armature circuit, RF is the resistance in the field circuit, K is the machine constant that depends on the design parameters of the machine, om is the angular velocity of the rotor, Kr is a constant that depends on the number of field windings, the geometry of the magnetic circuit, and the B-H characteristics of the iron and Vr is the voltage applied to the armature.
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