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.
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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.
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The constructional details of a three point starter are shown in Fig. 1. This is called as a three point starter because three points L, A and F are brought out for the external connections.
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There are many configurations of ac synchronous motors in which semiconductor control is used for controlling the stator currents in such a way that maximum torque is obtained at a given speed. Such configurations can be termed as brushless dc motors (or BLDC motors). Fig. 1: Construction of BLDC motor.
Variable reluctance stepper motor employs the principle of minimum reluctance path i.e. the magnetic circuit gets completed by the flux taking the minimum reluctance path, just as in electric circuit, the current takes the minimum resistance path. Depending on the stator excitations the motor aligns itself so as to provide a minimum reluctance path for
What is Variable Reluctance Stepper Motor? Working, Diagram & Construction Read More »
Synchronous Motor needs initial starting torque. For this purpose different methods can be used.
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