Interharmonics in Power System
Power electronics are widely used nowadays to improve system efficiency, flexibility, and reliability. The semiconductor devices used in power electronics are nonlinear devices, and the … Read more
Electrical
Torque Equation of DC Motor- Its Derivation
When the current-carrying conductor is placed in the magnetic field, the conductor experiences a force that exerts a turning moment or torque F x r. … Read more
What is Crest Factor or Peak Factor? Crest Factor Formula & Derivation
Definition- The ratio of the peak value to the root mean square(RMS) value of AC quantity is called the crest factor or peak factor. The … Read more
What is Form Factor? Form Factor Formula & its Derivation
What is Form Factor? Definition: The ratio of the root mean square value to the average value of an alternating quantity (current or voltage) is … Read more
What is Peak Value, Average Value and RMS Value?
Peak Value The sinusoidal waveform starts from zero, attains peak value, and again comes down to zero in a positive half cycle. In the next … Read more
Why Insulated Bearing is used for VFD driven Motor?
The insulated bearing for the motor is used to prevent the circulating current through the motor bearing. The circulating bearing current can damage the bearing. … Read more
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
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