Machine

Action Of Commutator

It is seen that, the e.m.f. induced in the conductors is always sinusoidal and commutator converts this sinusoidal e.m.f. to…

7 years ago

Torque And Speed Equations Of Dc Motor

Before analysing the various characteristics of motors, let us revise the torque and speed equations are applied to various types…

7 years ago

Load Characteristics Of D.C. Shunt Generator

Consider the d.c. shunt generator shown in the Fig. 1. The internal characteristics is E Vs IL while the external characteristics is…

7 years ago

Demagnetising And Cross Magnetizing Conductors

The conductors which are responsible for producing demagnetizing and distortion effects are shown in the Fig.1. Fig. 1 The brushes…

7 years ago

Kapp’s Regulation

Kapp had designed a diagram shown in Figure 1.42 to determine the regulation at any power factor. The description of…

7 years ago

Losses In A Transformer

Two types of losses occur in a transformer: Core loss or iron loss occurs in a transformer because it is…

7 years ago

Per Unit Resistance, Leakage Reactance And Impedance Voltage Drop

Full-load voltage of a transformer can be expressed as a fraction of the full-load terminal voltage. Let I1fl be the full-load primary…

7 years ago

Polarity Test Of A Single-Phase Transformer

Polarity testing of transformers is vital before connecting them in parallel. Otherwise, with incorrect polarity, it is not possible to…

7 years ago

Direction Of Rotation Of D.C. Motor

1. Direction of Rotation of Motor The magnitude of the force experienced by the conductor in a motor is given…

7 years ago

D.C. Compound Generators In Parallel

Consider two compound generators 1 and 2 running in parallel as shown in the Fig. 1. As the voltage characteristics…

7 years ago