what is the advantage of DC Motor over AC motor & Where its
applicable ?
Answer Posted / vikas pratap singh
The brushed DC motor generates torque directly from DC power supplied to the motor by using internal commutation, stationary permanent magnets, and rotating electrical magnets. Advantages of a brushed DC motor include low initial cost, high reliability, and simple control of motor speed. Disadvantages are high maintenance and low life-span for high intensity uses. Maintenance involves regularly replacing the brushes and springs which carry the electric current, as well as cleaning or replacing the commutator. These components are necessary for transferring electrical power from outside the motor to the spinning wire windings of the rotor inside the motor.
| Is This Answer Correct ? | 17 Yes | 2 No |
Post New Answer View All Answers
What are the differences between single phase and three phase?
i need previous entrence exam papers of nhpc.
how to measure earth resistance of a substation
A 50Hz,4-pole,3-phase,star-connected synchronous motor has a synchronous reactance of 12ohmsper phase and negligible armature resistances.the excitation is such as to give an open-circuit voltage of 13.2kilovolt.the motor is connected to 115kilovolt, 50hertz supplying. what maximum load can be the motor torque,line current and power factor?
THERMAL CAPACITANCE IS MEASURED IN..................................................
why burdens of VTs is more than CTs?
working principles of cf lamp,incandescentlamp and f lamp?
how braking & making capacity of circuit breaker are calculated?
If 24 KVA AVR having Input voltage 200-400v, Output voltage 415+-1%, what will be the voltage if Load is 13A.
Ceiling Fan and Storage type water heater. Discuss
what is the effect of connecting three phase supply lines to three phase auto transformer output terminals through a fuse of 10Amp and a circuit breaker (MCB). Is this connection permanently destroy the transformer?
Define unilateral circuit?
1 hp is equal to how much watt?
electrical ques
i am gng to visa interview this july i have 4 backlogs gre 1010,toefl 75,pls give me the tips pls pls