QUESTION 5 In a well-compensated D.C. shunt motor, speed is O Inversely proportional to the armature current Constant with respect to armature current Directly proportional to the armature current O Proportional to the square of the current

Q: A 240V d.c shunt motor has an armature resistance of 0.1 Ώ and it is running with 1000 rpm , the…

A: Back emf=terminal voltage+ drop in armature resistance. We will find total armature current by…

Q: M1. Which of the following is the preferred method of changing the direction of rotation of a DC…

A: a) The direction of rotation of motor is reversed either by changing the polarity of armature coil…

Q: The rotor speed of a permanent magnet motor is O Inversely proportional to the field current O…

A:

Q: a. The back-EMF generated by a DC motor is greatest when the motor is a) standing still b) running…

A: Back EMF of DC motor is directly proportional to the speed of the motor. Losses is occurs in field…

Q: Q11-250 V d.c. Shunt motor has an armature current of 20A when running at 1000 r.p.m at full load.…

A: DC Shunt Motor Flux should be taken as constant until any magnetization or demagnetization is not…

Q: A separately excited 300 V DC shunt motor under no load runs at 900 rpm drawing an armature current…

A: 300 V DC shunt motor under no load- Speed N1=900 rpm, Armature current Ia1 =2 A, Armature…

Q: Q5 A 230 V d.c. shunt motor takes an armature current of 20 A on a particular load. The armature…

A: The solution is given below

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.