A smooth variation of speed from zero to above normal with inherent stability of speed at all loads is achieved through an adjustable voltage system of speed control called Ward-Leonard Method of speed control. Fig. 1: Ward Leonard Method of Speed Control.
What is Ward Leonard Method of Speed Control? Working Principle, Diagram & Applications Read More »
The AC series motor is designed to work on AC and DC both. The stator is made of laminations of silicon steel to reduce the hysteresis and eddy current losses. The armature of the universal motor is the same as that of the ordinary series motor. Figure 1: AC Series Motor.
What is an AC Series Motor? Working, Diagram, Construction & Applications Read More »
Transformer, being a stationary electrical equipment, does not have rotational or windage losses. The losses which occur in a transformer are, Copper losses Iron or core losses.
Losses in Transformer – Copper, Iron, Hysteresis & Eddy Current Losses Read More »
A Split Phase Induction Motor is a type of single-phase motor that has two windings: a main winding and a starting winding. The primary feature of this motor is its ability to create a phase difference between the currents in the main and starting windings, which helps generate the necessary starting torque. Fig. 1. Split
Braking is the method of stopping the motor whenever it is needed. A three-phase induction motor can be braked by disconnecting the stator windings from the supply and feeding two stator phases with DC. A three phase slip-ring motor can also be braked by opening one supply lead to the motor and connecting a suitable
Induction Motor Braking – Methods & Diagram Read More »
The Star Delta Starter used to starting the standard squirrel cage induction motors with both ends of each of the three windings brought out (six terminals) are known as star-delta motors. The Star Delta Starter connects the three stator windings in star across the rated supply voltage at the time of starting. After the motor
What is Star Delta Starter? Working, Diagram, Construction & Advantages Read More »
Different DC motors are used in industry for various applications. Which type of motor will suit a particular load depends on the requirements of the load and characteristics exhibited by the motor. Applications of different motors are as under: DC Shunt Motor Applications Fig. 1: DC Shunt Motor Torque speed characteristics.
DC Motor Applications | Selection of DC Motors for a Particular Applications Read More »
The potential transformer is another type of instrumentation transformer. It is used to measure high ac voltages. The construction of a Potential Transformer (P.T.) is same as that of the normal transformer. Fig. 1 : Connection of Potential Transformer (PT) to measure voltage.
What is a Potential Transformer (PT)? Working Principle, Diagram, & Disadvantage Read More »
A two point starter (or 2 Point Starter) is used for starting of a DC series motor. Fig. 1: 2 Point Starter
What is a 2 Point Starter? Working Principle, Construction, Diagram & Disadvantage Read More »
DC Motor Starter is an additional external device which is required to be connected along with a dc motor, in order to start the motor in a safe manner. That means starting a dc motor without a starter is not safe for the motor. So we should understand the need of starter (Fig. 1). Fig.
DC Motor Starter – Need, Working Principle, Diagram, Need & Types Read More »