Q29. 100. A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 N and the field winding resistance is 80 N. The external resistance to be added in the armature circuit to limit the armature current to 125% of its rated value is 31.9 0 31.1 Q 15.9 Q

Q: A shunt motor has a nameplate rating of 140 hp, 500 V, 205 A, 1700 rpm. The shunt field circuit…

A:

Q: A shunt DC motor is fed from a 235 V DC source. The field coil has a resistance of 116 12. The total…

A: The given magnetization characteristics is shown below. The given characteristics is at a speed…

Q: A 280 V shunt motor has an armature resistance of 0.3 Q and field resistance of 115 Q. At no load,…

A:

Q: Needs Complete solution with 100 % accuracy.

A: The objective of the question is to calculate the input power to a DC series motor powered by a…

Q: A 230V DC series motor operates at its full load current and speed of 22A and 750 revolutions per…

A: Types of DC Motor Seperetely excited motor Series Motor Shunt Motor Compound Motor Differential…

Q: A 250V series motor runs at 500 rpm at rated load current of 75 A. The armature circuit has a…

A: It is given that: V=250 VN1=500 rpmIL1=Ia1=75 ARa+Rse=0.2 Ωϕ α Ia

Q: he current drawn by the a 230 V DC motor of armature resistance 0.5 Ω and back emf 200 V is ?

A: Given: Terminal voltage, V = 230 V. Armature resistance, Ra=0.5 Ω. Back emf, Eb=200 V.

Q: Q9) Specifications for a PM DC motor are as follows: electrical constant (KEMF) = 0.014V/rpm • and…

A: Given Data:A PMDC motor with,Electrical constant Armature resistance Input DC voltage To…

Q: (B) Design a starting circuit for the DC motor that will limit maximum starting current to 150% of…

A: Starting circuit of the DC motor is designed as shown below

Q: A 1200 rpm, 700V Series DC motor has an armature resistance of 20 and the field resistance of 90. If…

A: Efficiency = output power/ input power. Total losses = cupper loss + rotational losses.

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.