A shunt DC motor with a specification of 50-hp, 250-V, 200-A has an armature resistance, RA = 0.050. A starter circuit needs to be designed so that the starting current is at a maximum of 250% of its rated value, and the resistance must be switched out once the current falls to 95% of the rated value. Determine the number of stages needed for the starting resistance and the value of the resistance for each stage.

Q: Electromechanical energy conversion 5HP on the plate of the DC shunt motor. It says 200 V. The…

A: Motor output Motor efficiency Supply voltage No load speed No load line current starting line…

Q: A 120-V shunt DC motor has armature resistance R,=0.2N and and field resistance Rp=602 . The rated…

A: Given DataL V = 120 V Ra = 0.2 ohm Rf = 60 ohm rated full load current = 42 A

Q: A 200V DC shunt motor has an armature resistance of 0.102 and a field resistance of 100. When…

A: It is given that:

Q: A 500V shunt motor runs at its normal speed of 10 rev/s when the armature current is 120A. The…

A:

Q: A 240-V, 900 rpm DC series motor takes 25 A at full load. The armature resistance is 0.2 Q and the…

A:

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: 600V, DC series motor operates at 600 rpm and rated load. Armature resistance 0.1 ohm and series…

A:

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.