## EMF and Torque Equation of DC Machine

EMF and Torque Equation of DC Machine: EMF and Torque Equation of DC Machine - It was shown in Sec. 5.2 (Fig. 5.14 (a)) that in a dc machine the…

Continue Reading EMF and Torque Equation of DC Machine

## Armature Winding in DC Machine

Armature Winding in DC Machine: With reference to the single-coil elementary Armature Winding in DC Machine of Figs 5.13 and 5.14(a) which shows the B-wave of the machine relative to…

Continue Reading Armature Winding in DC Machine

## 2 Pole Elementary DC Machine

2 Pole Elementary DC Machine: Figure 5.13 shows a 2 Pole Elementary DC Machine with a single coil rotating armature. It may be seen that the field winding is stationary…

Continue Reading 2 Pole Elementary DC Machine

## Constant Current System for Speed Control of DC Motor

Constant Current System for Speed Control of DC Motor: For certain services, where there is a possibility of the motors being stalled such as with excavators, ship's windlasses etc. the…

Continue Reading Constant Current System for Speed Control of DC Motor

## Booster Speed Control of DC Motor

Booster Speed Control of DC Motor: A booster in series with the armature of the main motor may be employed for varying the voltage across the driving motor. The booster…

Continue Reading Booster Speed Control of DC Motor

## Armature Resistance Control Method of DC Motor

Armature Resistance Control Method of DC Motor: In this armature resistance control method of speed control, reduced speeds are obtained by inserting resistance in the armature circuit. It may be…

Continue Reading Armature Resistance Control Method of DC Motor

## Electric Braking of Separately Excited DC Motor

Electric Braking of Separately Excited DC Motor: The electric braking of separately excited dc motor is show in Figure 3.31. Figure 3.31 (a) illustrates a simplified representation of a single…

Continue Reading Electric Braking of Separately Excited DC Motor

## Thyristorised Control of DC Electric Traction Motor

Thyristorised Control of DC Electric Traction Motor: The modern trend is towards the use of dc motors (both separately excited and dc series motors) equipped with thyristor chopper control. The…

Continue Reading Thyristorised Control of DC Electric Traction Motor