Complete Electrical Machines course for B.Tech EEE and GATE in 80+ video lectures: magnetic circuits, DC machines, single-phase and three-phase transformers, induction motors, alternators and synchronous motors. Watch in order: each lecture builds on the previous one. Modules: 1. Magnetic Circuits & Electromagnetic Induction (Lectures 1A-1R) 2. DC Machines: construction, windings, EMF equation, armature reaction, losses (2A-2J) 3. DC Motors: torque, characteristics, speed control (3A-3C) 4. Single-Phase Transformers: EMF equation, equivalent circuit, OC/SC tests, regulation, efficiency (4A-4H) 5. Three-Phase Transformers: winding connections, vector groups, Scott connection (5A-5D) 6. Three-Phase Induction Motors: rotating magnetic field, torque-slip, equivalent circuit, starting (6A-6K) 8. Alternators (Synchronous Generators): EMF equation, armature reaction, voltage regulation, two-reaction theory (8A-8J) 9. Synchronous Motors: starting, effect of excitation, synchronous condenser, applications (9A-9J) 10. Single-Phase Induction Motors: double revolving field, types, equivalent circuit (10A-10E) Solved problems for every module (Electrical Machines Tutorials): https://www.youtube.com/playlist?list=PL5TKV1tzb09kPh9xyaU8yZC4ph305bTty Notes & more: https://engineeringdevotion.com #ElectricalMachines #ElectricalEngineering #GATEEE
Curated by: Engineering Devotion (81 videos)
A Single-Phase Transformer is a static electrical device that converts AC electrical energy from one voltage level to another at the same frequency, using the principle of mutual induction. It consists of a primary winding and a secondary winding wound around a common laminated magnetic core. Losses in a Single-Phase Transformer: Transformers are highly efficient but incur losses, primarily: Core Losses (Iron Losses): These are constant losses occurring in the magnetic core, independent of the load. They consist of: Hysteresis Loss: Due to the repeated magnetization and demagnetization of the core material. Eddy Current Loss: Caused by circulating currents induced in the core by the changing magnetic flux. These are measured by the open-circuit test. Copper Losses (I²R Losses): These are variable losses occurring in the windings due to their ohmic resistance. They are proportional to the square of the current flowing through the windings and thus vary with the load. These are measured by the short-circuit test. Equivalent Circuit of a Single-Phase Transformer: The equivalent circuit is a simplified representation of the transformer, allowing for easier analysis of its performance. It includes: Winding Resistances (R1, R2): Representing the ohmic losses in the primary and secondary windings. Leakage Reactances (X1, X2): Representing the leakage flux that doesn't link both windings. Shunt Branch (R0, Xm): This parallel branch represents the no-load characteristics: Core Loss Resistance (R0): Accounts for the core losses (hysteresis and eddy current). Magnetizing Reactance (Xm): Accounts for the magnetizing current required to establish the flux in the core. The entire circuit can be referred to either the primary or secondary side for simplified calculations. Important search queries: single phase transformer working principle, types of transformer losses, transformer equivalent circuit diagram, calculate transformer efficiency, open circuit test transformer, short circuit test transformer. #SinglePhaseTransformer #TransformerLosses #EquivalentCircuit #ElectricalEngineering #PowerTransformer --- Electrical Machines full course (lectures): https://www.youtube.com/playlist?list=PL5TKV1tzb09lbVthPhckKZ7JsnwHkWmFP Electrical Machines solved problems (tutorials): https://www.youtube.com/playlist?list=PL5TKV1tzb09kPh9xyaU8yZC4ph305bTty Notes & more: https://engineeringdevotion.com