# Question: Which motor has high starting current?

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The induction motor draws a high starting current as compared to the running condition. The starting current of the induction motor is about 5 or 6 times the motor full load current.

## Why motor starting current is high?

At start, the reactance of the rotor is high because the slip of the motor is equal to unity. The value of Rr/s increase as the slip gets decrease. When the induction motor is started the rotor reactance is more than the rotor resistance and because of the large Xr/Rr ratio the motor takes large inductive current.

## Which motor has high starting torque and starting current?

Series wound DC motors are best for applications that require high startup torque, without the need for speed regulation. Like a shunt motor, as a load is applied to a DC series motor, the motor speed decreases, which reduces the back EMF and increases the net voltage.

## Which one of the following motor has high starting torque?

The capacitor start motor develops a much higher starting torque of about 3 to 4.5 times of the full load torque.

## In which method of starting a motor the starting current is the maximum?

Explanation: At starting when slip is 1, the voltage induced is maximum. Explanation: Starters are needed in induction motors to limit the starting current.

## Why is DC motor current so high?

Answer: The starting current is high as there is no back EMF or counter EMF present in the armature circuit because atstarting counter EMF is zero. … It’s armature has very less resistance due to this it need more current at starting time. Hence DC starters are used to limit the starting current ofmotor.

## How long does motor starting current last?

After the first half-cycle the motor begins to rotate and the starting current subsides to 4 to 8 times the normal current for several seconds. As a motor reaches running speed, the current subsides to its normal running level. Typical motor starting characteristics are shown in Curve 1.

## Which motor has a poor starting torque?

When a capacitor short-circuits, the winding in the motor may burn out. When a capacitor deteriorates or opens, the motor has poor starting torque. Poor starting torque may prevent the motor from starting, which will usually trip the overloads.

## Which motor has highest no load speed?

Explanation: At no load, armature current tends to zero, flux φ tends to zero, where speed is inversely proportional to the flux, speed will tend to infinity. Thus, no load speed of DC series motor is highest.

## Which DC motor has maximum self loading property?

Which DC motor has got maximum self-loading property? Explanation: A differentially compound DC motor, flux reduces so sharply at small increase in load at higher values of load.

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## Which motor is used in hand watches?

Both analog and stepped-movement quartz clocks use the Lavet-type stepping motor (see Quartz clock). Through miniaturization, it can be used in wristwatches and requires very little power, making a battery last for many years.