Monitor Power using IC

  When a system uses both AC and DC power, two different ICs are required for Power Monitoring to ensure superior performance and accuracy. Many of the applications such as Solar Inverters, Smart Lighting and Cloud Servers often use both modes to maintain safe operation, AC as the main Power Supply while DC as backup Power Supply, or vice-versa. Microchip Technology Inc has solved this problem and eased up the process of power monitoring by launching a flexible dual-mode power monitoring IC that measures both AC and DC modes with an accuracy… Read More

Power Management ICs

  Recently, Maxim Integrated Products Inc. have launched two new high performance and scalable Power Management Integrated Circuits (PMICs). With these ICs, mobile system designers can maximize performance per watt, while increasing system efficiency for computationally-intensive deep-learning systems-on-chip, FPGAs and application processors. These ICs, MAX77714 and MAX77752, find applications in augmented/virtual reality, gaming, solid-state drives (SSDs), security and Industrial Internet of Things (IIoTs) and many more handheld devices. Maxim Integrated Products Inc. claims that these ICs consume 40 percent less power than standard solutions, together with compact power factor and extended battery… Read More

Ways to Build Power Supply Skill Set

  When you study any of the upcoming new technologies, the main part of the system is Power Supply Unit. Power Supply Unit is the heart of the system, which supplies power to all the ICs, Controllers, Driving Circuits, etc. This places higher demands on the Power Supply Units. Recently, a company named Keysight Technologies have published an e-book titled “4 Ways to Build Your Power Supply Skill Set”. This e-book gives tips to be considered to design engineers while designing power supply. Download link: E-book Source: Keysight Technologies

Off-line PWM Controller from STMicroelectronics Boosts Efficiency, Flexibility, and Stability of 5-30V Power Supplies

STMicroelectronics’ STCH03 offline Pulse-Width Modulation (PWM) controller combines high integration with accurate constant-current output using primary-side regulation enabling economical mobile chargers, power adapters, or auxiliary supplies to meet stringent eco-design limits for average efficiency and standby power. At heavier loads, the STCH03 maximizes efficiency by operating in quasi-resonant mode with zero-voltage switching (ZVS) controlled by detecting transformer demagnetization. The detection circuitry also provides for line-voltage feed-forward control, which ensures accurate constant-current regulation. Maintaining operation at the boundary of continuous (CCM) and discontinuous (DCM) transformer current, the STCH03 limits the converter’s maximum operating… Read More

Under Voltage and Over Voltage monitoring

  The TPS3702 family of devices combines two comparators and a precision reference for overvoltage and undervoltage detection. The TPS3702 features a wide supply voltage range (2 V to 18 V) and highly accurate window threshold voltages (0.9% over temperature). The TPS3702 is designed for systems that require an active low signal if the voltage from the monitored power supply exits the accuracy band. The outputs can be pulled up to 18 V and can sink up to 10 mA. Unlike many other window comparators, the TPS3702 includes the resistors used to… Read More

Electric Locomotives with 3-phase Drives

Introduction   Till electronics came into the field of traction recently, the best suited drive for traction application was the dc series motor because of its inherent characteristics to give high torque at low speeds and vice-versa. The dc series motor was the best solution found for meeting the actual service as well as control requirements. On a fixed frequency, the asynchronous motor has a characteristic which is not well suited for traction application. However, this motor is of rugged construction when compared to a dc motor and requires much lower inputs… Read More

Railway Production in India

Production of Rolling Stock Indian Railways have set up production units for Rolling stock and Rolling Stock components Apart from production for use of Indian Railways, these production units export Rolling Stock and components to many countries such as Burma, Bangladesh, Sri Lanka, Hungary, East Africa, Central Asian countries, East Asian countries etc. The following are the production units of Mechanical Department for production of different types of Rolling Stock: List of Production Units Name of PU Place where situated Chittaranjan Locomotive Works Chittaranjan Diesel Locomotive Works Varanasi Integral Coach Factory Chennai… Read More

Fuse, Types and Characteristics

Fuses A fuse is a device that protects a circuit from an over current condition only. It has a fusible link directly heated and destroyed by the current passing through it. A fuse contains a current-carrying element so that the heat generated by the flow of normal current through it doesnot cause it to melt the element; however, when an over current or short-circuit current flowsthrough the fuse, the fusible link will melt and open the circuit. The Underwriter Laboratories (UL) classifies fuses by letters e.g. class CC, T, K, G, J,… Read More

Types of Relays

An electrical relay is a switch that is used for controlling circuits. Today you’ll learn about different types of electrical relays. Electromagnetic attraction type The magnetic force produced by undesired current attracts the armature of the relay. Electromagnetic attraction type relays can operate on either a.c or d.c quantities. They are further divided into three types: Attracted armature type Solenoid type Balance beam type Induction type relay The working of Induction type relays relies on the electromagnetic induction phenomenon. They are only used for a.c quantities. They are further classified into two… Read More

Hydroelectric Plants in India

  Hydroelectric power is a major electrical power generation source. Advantages: Clean Fuel The only fuel required for hydroelectric power generation is water. It is clean resource, has no pollutants, burning, or any sort of chemical reactions associated with it. Small running charges Compared to coal, gas, diesel power station and power stations, the hydroelectric station has very small running charges. Renewable Power generation through hydroelectric stations relies on the water cycle. Water comes through the reservoir, flows through penstock, passes through turbines, exits the station and joins some river. In fact,… Read More