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## What are the factors which influence the speed of the shunt motor?

The above equation shows that the speed depends upon the **supply voltage V, the armature circuit resistance R _{a}, and the field flux Ф**, which is produced by the field current. In practice, the variation of these three factors is used for speed control.

## What are the ways of changing varying the speed of DC shunt motors?

Thus, the speed of a DC motor can be controlled in three ways: **By varying the supply voltage**. **By varying the flux**, and by varying the current through the field winding. By varying the armature voltage, and by varying the armature resistance.

## How speed of the DC shunt motor can be increased *?

How speed of the DC shunt motor can be increased? Explanation: For a constant load, load current will remain constant. **Decreasing armature current will help in** increasing speed for DC shunt motor.

## What affects the speed of a motor?

The rotating speed of an electric motor depends on two factors: its physical construction, and **the frequency (Hz) of the voltage supply**.

## How do you increase motor speed?

Increasing the speed can be achieved by **increasing the supply frequency as the speed** and frequency are directly proportional; however, there are two constraints. The first is the saturation of the magnetic circuit, but this issue can be significantly avoided by keeping the V/f ratio constant.

## What is the minimum speed limit of DC shunt motor?

Two adjustable-speed dc shunt motors have maximum speeds of 1800 r/min and minimum speeds of **500 r/min.** Speed adjustment is obtained by field-rheostat control. Motor A drives a load requiring constant power over the speed range; motor B drives one requiring constant torque.

## What will happen if excitation of DC shunt motor is changed?

If the excitation or field current is changed, **the armature current changes**, and back emf also will be changed accordingly and hence power will remain constant.

## Which motor has the poorest speed control?

1. Which of the following DC motor has the poorest speed control? Explanation: **DC series motor** at no load condition gives infinite speed ideally. Practically it will damage all the armature circuit.