211 SRI RAMAKRISHNA MISSION VIDYALYA POLYTECHNIC COLLEGE.

  Wireless Electric Vehicle Charging System (WEVCS) uses resonant inductive coupling to transfer power without physical cables .  A transmitter pad on the ground creates a magnetic field that a receiver pad on the car's underside captures and converts into DC power, operating similarly to a giant wireless phone charger. How the Technology Works Components: A ground assembly (charging pad + electronics) and a vehicle assembly (receiver coil + controller) . Process: The system typically boasts 92% to 94% efficiency . Once parked, the coils communicate via Wi-Fi or Bluetooth to align properly before transferring energy.   Types of Charging: Stationary: Charges the vehicle while parked in a garage or designated lot. Dynamic: Transfers power from transmitter pads embedded directly underneath roadways.  

   A H orn gap arrester is a protective device used in electrical power systems to safeguard transformers, insulators, and transmission lines from high-voltage surges caused by lightning . It uses an air gap that arcs over during a surge, diverting the excess voltage safely to the ground.  Construction and Parts Horn-Shaped Electrodes: Two metal rods shaped like horns, separated by a small distance. The gap gradually widens as it moves upward. Series Resistance: Connected to one side to limit the flow of follow-through current after the surge has discharged. Choke Coil: Connected to the line side; it offers low reactance to normal frequencies but high reactance to high-frequency transients, preventing surges from entering the protected equipment. Porcelain Insulators: Used to mount the horns safely on the poles. [ 1 , 2 , 3 ] Working Principle Under normal operating voltages, the air gap acts as an insulator, preventing current from jumping between the horns. When a...

  Introduction to Electric Vehicles (EVs) Electric Vehicles (EVs) are vehicles that operate using electric motors instead of conventional internal combustion engines (petrol or diesel). Electrical energy is stored in rechargeable batteries and supplied to the motor for vehicle movement. EV technology is one of the fastest-growing emerging technologies in Electrical and Electronics Engineering because of its energy efficiency and environmental benefits. Working Principle In an EV, electrical energy stored in the battery pack is delivered to the electric motor through a power electronics controller . The motor converts electrical energy into mechanical energy to drive the wheels. During braking, regenerative braking recovers some energy and stores it back in the battery. Main Components Battery Pack – Stores electrical energy Electric Motor – Converts electrical energy into mechanical motion Power Electronics Controller – Controls and manages power flow Charging...

  Applications of silicon control rectifier (SCR) The silicon controlled rectifier (SCR) is used in AC voltage stabilizers. The silicon controlled rectifier (SCR) is used as switch. It is used in choppers. The silicon controlled rectifier (SCR) is used in inverters. The silicon controlled rectifier (SCR) is used for power control. It is used for DC circuit breaker. Silicon control rectifier (SCR) is used in battery charger. It is used to Adjust light dimmer. It is used to control  motors speed. The SCR is used in pulse circuit. It is used for AC power control with solid relay.

How EV Technology Works? Electric Vehicles (EVs) do not use petrol or diesel like normal cars. Instead, they run on electricity stored in a battery. Here’s how it works: Battery  – It stores electricity.  Electric Motor  – Converts electrical energy into mechanical energy to drive the wheels. Controller  –Manages the flow of electricity between the battery & the motor, controlling speed & torque. Charging  – Allows the vehicle to recharge its battery by plugging into a charging point or regenerative braking, which recovers energy while slowing down.

  Industrial automation refers to the use of control systems, software, and robotics to manage industrial processes with minimal human intervention . It optimizes production, reduces operating costs, and improves safety by replacing repetitive or hazardous manual tasks with machine-driven workflows. Core Technologies PLCs (Programmable Logic Controllers) & PACs: Industrial computers used to control specific machines and processes in real-time . SCADA (Supervisory Control and Data Acquisition): Systems used for large-scale, enterprise-level monitoring and data collection. Industrial Robotics: Automated arms and AGVs (Automated Guided Vehicles) that handle heavy lifting, assembly, and welding. Industrial IoT (IIoT): Networks of smart sensors that allow machines to communicate and share operational data. AI & Machine Learning: Analyzes operational data to predict equipment failures before they happen (predictive maintenance) and optimize supply chains.