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- The slight curvature at the lower end of the O.C.C. of a self-excited dc generator is due to
- A separately excited dc motor is required to be controlled, from a 3-phase supply, for its operation in the first...
- separately excited dc motor controlled by chopper with a frequency of 500hz and source voltage of 230v and rated value of motor is ...
- A separately excited dc motor operating in first quadrant is fed from 3-phase semi -converter free -wheeling
- A single-phase half-controlled rectifier is driving a separately excited dc motor. The dc motor has a back emf
- A DC chopper is used for regenerative braking of a separately excited DC motor. The DC supply
- A 220 volt 875 rpm 150 ampere separately excited DC motor is fed from a 1 phase fully controlled rectifier with an AC source voltage of 220 volt 50 Hz ans armature reistance of 0.6 ohm. Calculate firirng angle for rated motor torque and 750 rpm
- The no-load speed of a single-phase SCR bridge converter fed separately excited dc motor operating at a
- for the voltage built-up a self-excited D.C. generator, which of the following is not an essential
- Separately Excited DC motor
- If a self excited d.c. generator after being installed, fails to build up voltage on its first trial run, the first
- A separately excited generator as compared to a self-excited generator?
- A separately excited dc generator is running at rated speed and at no load. If its field winding is suddenly...
- The supply both to field and armature circuits are disconnected simultaneously in a separately excited dc...
- A 0.5 Hp, 6 pole wound rotor induction motor is excited by a 3 phase 60 Hz source. Calculate the frequency of...
- Why a single phase motor is not a self starting motor?
- The stator of a 415V, 50 Hz, 4-pole slip ring Induction Motor is excited by rated frequency with slip rings open
- If the load of the normally excited synchronous motor is increased the power factor will?
- If the field of synchronous motor is under excited, power factor will be?
- An over excited synchronous motor on noload is known as?
- what is separately excited motor ?
- A single-phase induction motor with only the main winding excited would exhibit the following response at
- How is a three phase cage induction motor self starting?
- Is induction motor is self starting?
- If field current is decreased in shunt dc motor, the speed of the motor
- In a DC motor, it is important to place the brushes along ______
- A large dc motor is required to control the speed of the blower from a 3 -phase ac source. The suitable ac to ...
- A dc shunt motor runs at 500 r.p.m at 220 V. A resistance of 4.5 Ω is added in series with the armature for...
- The dc motor used for intermittent high torque loads is
- If the back emf of a dc motor is doubled and its speed is also doubled, the torque developed in the machine...
- The method of speed control used for increasing the speed of a dc shunt motor above its rated speed is
- If the load current and flux of a DC motor are held constant, and voltage applied across its armature is...
- What is the order of the characteristic equation of an armature controlled DC motor?
- Which type of starter is used to start the DC motor?
- What is the principle of DC motor?
- What is the back EMF of a dc motor?
- A separately excited d.c. motor fed from single phase full converter with firing angle 60° runs at 1000 r.p.m.
- In a self-controlled synchronous motor fed from a variable frequency inverter
- Which D.C. motor has got maximum self relieving property ?
- Which D.C. motor has got maximum self loading property?
- A synchronous motor can be made self starting by providing?
- What is back emf in DC motor? Explain its significance.
- A cumulative dc compound motor runs at 1500 rpm. on full load. If its series field is short-circuited, its speed
- Armature shunting method of speed control of dc shunt motor is preferred over annature resistance method...
- A 750 Hp, 250 V, 1200 r/min DC motor is connected to a 208 V, 3 phase, 60 Hz, line using a 3 phase bridge...
- direction of DC motor is given by Fleming's left hand rule or right hand rule?
- State the function of following parts of DC motor : i) Yoke ii) Poles iii) Field winding iv) Commutator.
- With the help of neat diagrams,explain the following methods of speed control in DC series motor. i) Field diverter method. ii) Armature diverter method.
- State the principle of operation of a dc motor.
- Give the two functions of yoke in DC motor.

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