What will happen if you increase the current in the motor?

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What will happen if you increase the current in the motor?

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asked Mar 15, 2018 by anonymous

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asked May 3, 2018 by anonymous

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asked May 8, 2018 by anonymous

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asked Apr 29, 2018 by anonymous

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asked Apr 29, 2018 by anonymous

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asked Apr 29, 2018 by anonymous

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asked Apr 29, 2018 by anonymous

The function of a brush and commutator arrangement in a dc motor is to

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asked Apr 28, 2018 by anonymous

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asked Apr 28, 2018 by anonymous

In a single-phase induction motor when the rotor is stationary and voltage is applied to the stator, then

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Last Answer : In a single-phase induction motor when the rotor is stationary and voltage is applied to the stator, then the flux first decreases and then increases in the same direction

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asked Apr 28, 2018 by anonymous

The maximum reluctance power of a salient-pole synchronous motor having direct-axis reactance, 1.0 pu and

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asked Apr 28, 2018 by anonymous

The effect of increasing load on a synchronous motor running with normal excitation is

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asked Apr 28, 2018 by anonymous

A 3-phase, 4-pole, 50Hz induction motor runs at a speed of 1440 rpm. The rotating field produced by the rotor

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Last Answer : 0

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An 8-pole, 50Hz, three-phase induction motor is running at 705rpm and has a rotor copper loss of 5kW.

An 8-pole, 50Hz, three-phase induction motor is running at 705rpm and has a rotor copper loss of 5kW. Its rotor input is (A) 5.06 kW (B) 0.3 kW (C) 100 kW (D) 83.33 kW
Last Answer : An 8-pole, 50Hz, three-phase induction motor is running at 705rpm and has a rotor copper loss of 5kW. Its rotor input is 83.33 kW

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asked Apr 28, 2018 by anonymous

The torque developed by any 3-phase induction motor at 0.8 p.u. slip is

The torque developed by any 3-phase induction motor at 0.8 p.u. slip is (A) Full-load torque (B) unstable torque (C) starting torque (D) break down
Last Answer : The torque developed by any 3-phase induction motor at 0.8 p.u. slip is unstable torque

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In a 3-phase slip-ring induction motor, the slip at some speed is 0.05. The speed is reduced by inserting an

In a 3-phase slip-ring induction motor, the slip at some speed is 0.05. The speed is reduced by inserting an external resistance in the rotor circuit and the slip is 0.15. If the rotor winding resistance per phase is 0.2 Ω, the external resistance is (A) 0.2 Ω (B) 0.3 Ω (C) 0.4 Ω (D) 0.5 Ω
Last Answer : In a 3-phase slip-ring induction motor, the slip at some speed is 0.05. The speed is reduced by inserting an external resistance in the rotor circuit and the slip is 0.15. If the rotor winding resistance per phase is 0.2 Ω, the external resistance is 0.3 Ω

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asked Apr 28, 2018 by anonymous

A three-phase synchronous motor connected to ac mains is running at full load and unity power factor.

A three-phase synchronous motor connected to ac mains is running at full load and unity power factor. lf its shaft load is reduced by half and field current is held constant then its new power factor will be
Last Answer : Leading

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asked Apr 28, 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

If a D.C. motor designed for 40°C ambient temperature is to be used for 50°C ambient temperature, then the motor?

Last Answer : If a D.C. motor designed for 40°C ambient temperature is to be used for 50°C ambient temperature, then the motor is to be derated by a factor recommended by manufacturer and select the next higher H.P. motor.

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asked Mar 20, 2018 by anonymous

Which motor has the poorest speed control?

Last Answer : Series motor has the poorest speed control.

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asked Mar 20, 2018 by anonymous

For a D.C. shunt motor if the excitation is changed?

Last Answer : For a D.C. shunt motor if the excitation is changed torque will change but power will remain constant.

168 views 1 answer

asked Mar 20, 2018 by anonymous

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

The speed of a D.C. motor can be controlled by varying 1. Its flux per pole 2. Resistance of armature circuit 3. Applied voltage 4. All of the above
Last Answer : The speed of a D.C. motor can be controlled by varying 1. Its flux per pole 2. Resistance of armature circuit 3. Applied voltage 4. All of the above

397 views 1 answer

asked Mar 20, 2018 by anonymous

At the instant of starting when a D.C. motor is put on supply, it behaves like?

Last Answer : At the instant of starting when a D.C. motor is put on supply, it behaves like a low resistance circuit.

132 views 1 answer

asked Mar 20, 2018 by anonymous

prasadnani · Answer 1 · 2019-06-01T10:12:51+0000

Increasing current means increasing frequency of the motor because current is directly proportional to rotations of the motor rotor

What will happen if you increase the current in the motor?

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