Dispersion Coefficient of Induction Motor
The power factor and dispersion coefficient of an induction motor have a relationship. The smaller the dispersion coefficient, the better the power factor. Power factor … Read more
Machines
An electrical machine converts mechanical energy into electrical energy or vice versa. The transformer is also an electrical machine which transform the voltage without changing the frequency. We will discuss about the;
- DC Motor
- DC generator
- Induction Motor
- Transformer
- Electrical drives
- Alternator or synchronous generator
Why is Power Factor of Transformer is Poor at no Load?
The transformer draws no load current from the supply source when its secondary is open circuit. The no-load current has two components: magnetization current(Im) and … Read more
Why an Induction Motor is almost constant Speed Motor?
At no load the speed is closest to its synchronous speed. This running speed reduces further when loaded towards its full load capacity, to about 5% for a moderately rated machine tojust more than 5% for smaller rated machine.
Instrument Safety Factor of Current Transformer
The current transformer is used for measuring the current. The specifications of the measuring class CT are given below. The Instrument Safety Factor (ISF) is a … Read more
Condition for Maximum Power of DC Motor
The DC motor is most suitable for loads that demand a higher starting torque. When DC voltage is applied to the armature, the motor is … Read more
What is meaning of 5P20 in current transformer?
There are three types of current transformers which are used for various applications. 1. Metering Purpose2. Protection Purpose3. Special Protection Purpose The particular class of … Read more
Losses in DC Machine- Types of Losses
Electric rotating machines are used for the conversion of energy. The motor converts electrical energy into mechanical energy, and the generator converts mechanical energy into … Read more
DC Motor or Direct Current Motor
What is DC Motor? DC motor or Direct Current Motor converts electrical energy into mechanical energy. It is used to drive the mechanical loads. The … Read more
Why slip ring induction motor is not started with its slip ring short circuited?
The rotor of the slip ring induction motor is connected to the external resistances. When the motor is started, the total external resistance gets added … Read more
Why the rotor winding of three phase wound rotor induction motor is star connected?
The stator can either have a star or delta connection. Many motors have a winding scheme and coils with six connections that connect the windings … Read more