Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
There are three most important characteristics of a dc generator. They are (i) No load saturation characteristics,(ii) Internal (or) total characteristics,(iii) External characteristics
with Solved Example Problems
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
DC generators are usually classified according to their methods of field excitation.
with Solved Example Problems
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
Let Ɵ = Flux/pole in Weber,z = Total number of armature conductors = No of slots × No of conductors/slots,P = No of poles,A = No of parallel paths in armature.
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
Let us consider a single turn rectangular coil ABCD rotating about its own axis in a magnetic filed provided by either permanent magnet or electromagnets.
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
The major parts of the DC generator is given below and also shown in fig.2.2. 1. Magnetic frame or yoke 2. Poles, interpoles, windings, pole shoes 3. Armature 4. Commutator 5. Brushes, bearings and shaft
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
An electrical generator is a rotating machine which converts mechanical energy in to electrical energy.
Basic Circuit diagram, Phasor diagram, Formula with Solved Example Problems | Electrical Circuits
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit I: Electrical Circuits
Apparent power, S = VI, Active power, P = VI cos ϕ, Reactive power, Q = VI sin ϕ
Basic Circuit diagram, Phasor diagram, Formula with Solved Example Problems | Electrical Circuits
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit I: Electrical Circuits
Apparent power S = VI,Real power, P = VI cos ϕ,Reactive power, Q = VI sin ϕ
Basic Circuit diagram, Phasor diagram, Formula with Solved Example Problems | Electrical Circuits
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit I: Electrical Circuits
Apparent power, S = VI,Real power, P = VI cos ϕ,Reactive power Q = VI sin ϕ
Definition, Formula with Solved Example Problems | Electrical AC Circuits
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit I: Electrical Circuits
Average power is the product of the effective values of both voltage and current multiplied by cosine of the phase angle between voltage and the current.
Circuit, Waveform, Formula with Solved Example Problems | Electrical AC Circuits
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit I: Electrical Circuits
Consider the pure capacitor connected across a sinusoidal supply. The voltage and current are out of phase. The current leads the voltage by 90°.
Circuit, Waveform, Formula with Solved Example Problems | Electrical AC Circuits
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit I: Electrical Circuits
When a sinusoidal voltage is applied across a inductor, a certain amount of sine wave current passes through it.