A permanent magnet DC mitor has an armature resistance 1.4 52. When it is supplied by 75-V DC source, i+ has a) what 6.) What 1800 rpm from no-load speed d 2200 pm and draws 1.7 A. is the rotationalloss ? a TS the output power (in hp) when it is opeated at a 70.V DL Source 7

Q: What characteristic is desirable in the B–H curve for a prospective material to be used in a…

A: In permanent magnet, the magnetic material in which the magnetic dipoles are already oriented in a…

Q: A series motor runs at 700 rev/min when the voltage is 300 V and the current is 20 A. The armature…

A: Initial speed of motor N1=700 rpm. Initial terminal voltage V1=300 V. Armature current Ia=20 A.…

Q: A d.c. shunt machine generates 250-V on open circuit at 1000 r.p.m. Effective armature resistance is…

A:

Q: series motor runs at (800 r.p.m) when the voltage is (400 V A). The armature resistance is (0.4 Q)…

A:

Q: Ashunt-wound DC motor with the feld coils and rotor connected in parallel (Figure 1) operates from a…

A: From the DC shunt motor equivalent circuit

Q: A 250 V series motor has an armature resistance of 0.2 ohm and a series-field resistance of 0.18…

A:

Q: A 220 V separately excited dc motor takes 20 A and the armature resistance is 1.0 0. If the armature…

A: We need to find out the speed for given motor.

Q: 14. If a rotating standard with a basic K, of +% whr per revolution is used on 120-volt and 15-amp…

A:

Q: The armature of a d.c. The machine has a resistance of 0.25 ohm and is connected to a 300V supply.…

A: The back emf is modeled as an opposing variable emf to the emf powering the motor. When the motor is…

DC Series Motors

A DC motor is a type of electric motor which converts electric energy into mechanical energy. The forces that are produced by the magnetic field are what those common types of motors rely upon. Either electro-mechanical or electronic, all types of DC motors have some internal mechanism to change the current direction in part of the DC motors. As the DC motors could be powered from existing DC lighting power distribution systems, these motors were the first form of motors widely used. By changing the strength of the current in its field winding or by using a variable supply voltage, the speed of the DC motors can be controlled over a wide range.