The speed control of universal motor used for sewing machines is by?

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asked Mar 20, 2018 by anonymous

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Speed control of a universal motor is achieved by?

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asked Mar 20, 2018 by anonymous

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asked Mar 20, 2018 by anonymous

Speed control by Ward Leonard method gives uniform speed variation?

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asked Mar 20, 2018 by anonymous

A universal motor is one which?

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asked Mar 20, 2018 by anonymous

Usually wide and sensitive speed control is desired in case of?

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asked Mar 20, 2018 by anonymous

In D.C. machines fractional pitch winding is used?

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asked Mar 20, 2018 by anonymous

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asked Mar 20, 2018 by anonymous

The speed of a D.C. motor can be controlled by varying

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asked Mar 20, 2018 by anonymous

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asked Mar 20, 2018 by anonymous

For the same H.P. rating and full load speed, following motor has poor starting torque?

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asked Aug 17, 2019 by anonymous

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asked Aug 17, 2019 by anonymous

applications of each: i) Universal motor ii) Stepper motor.

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asked Jul 26, 2019 by anonymous

State two applications of 1) Shaded pole motor 2) Universal motor

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asked Jul 20, 2019 by anonymous

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asked Mar 20, 2018 by anonymous

A universal motor can run on?

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Silicon steel is used in electrical machines because it has?

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asked Mar 20, 2018 by anonymous

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asked Mar 20, 2018 by anonymous

As the load is increased the speed of D.C. shunt motor will?

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asked Mar 20, 2018 by anonymous

The speed of a D.C. series motor is?

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asked Mar 20, 2018 by anonymous

In case of a reluctance motor, when the load is increased so that it cannot maintain synchronous speed the motor will?

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asked Mar 15, 2018 by anonymous

Why the speed of synchronous motor is constant?

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Speed torque characteristic of a repulsion induction motor is similar to that of a D.C.?

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Regulating-transformers are used in power systems for control of

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asked Mar 20, 2018 by anonymous

In a D.C. shunt motor, speed is?

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asked May 8, 2018 by anonymous

A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s.

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 W and the field winding resistance is 80 W. The net Voltage across armature resistance at the time of plugging will be

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asked Mar 20, 2018 by anonymous

Centrifugal switch disconnects the auxiliary winding of the motor at about what percent of synchronous speed?

Last answer: Centrifugal switch disconnects the auxiliary winding of the motor at about 70 to 80 percent of synchronous speed.

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asked Mar 20, 2018 by anonymous

If the centrifugal switch does not open at 70 to 80 percent of synchronous speed of motor, it would result in?

Last answer: If the centrifugal switch does not open at 70 to 80 percent of synchronous speed of motor, it would result in damage to the starting winding.

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asked Mar 20, 2018 by anonymous

In variable speed motor?

Last answer: In variable speed motor a weaker commutating field is needed at low speed than at high speed.

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asked Mar 20, 2018 by anonymous

The type of D.C. motor used for shears and punches is?

Last answer: The type of D.C. motor used for shears and punches is cumulative compound D.C. motor.

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asked Mar 20, 2018 by anonymous

The motor used for the compressors is?

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asked Mar 20, 2018 by anonymous

The shaded pole motor is used for?

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asked Apr 30, 2018 by anonymous

A differentiator is not usually used in control system, because it : -

A differentiator is not usually used in control system, because it : - (A) reduces damping (B) increases error (C) reduces gain margin (D) increases input noise

Last answer: A differentiator is not usually used in control system, because it : - increases input noise

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asked Mar 20, 2018 by anonymous

The operating speed of a synchronous motor can be changed to new fixed value by?

Last answer: The operating speed of a synchronous motor can be changed to new fixed value by changing frequency.

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asked Mar 10, 2018 by anonymous

What are the electromagnetic waves used in remote control?

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The electric motor used in portable drills is?

Last answer: The electric motor used in portable drills is universal motor.

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asked Aug 18, 2019 by anonymous

What type of motor is used for drilling machines?

Last answer: universal motor also used in Handheld power tools, blowers, blenders, vacuum cleaners, polishers and kitchen appliances.universal motor is defined as a motor which may be operated either on direct or single phase AC supply at approximately the same speed and output

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anonymous · Answer 1 · 2018-03-20T19:25:39+0000

The speed control of universal motor used for sewing machines is by varying the resistance.

The speed control of universal motor used for sewing machines is by?

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