Electrical Drives And Devices

A electronic ac drives / variable frequency drives (VFD) low/ medium voltage is a system for controlling the rotational speed of an alternating current (AC) electric motor by controlling the frequency of the electrical power supplied to the motor. A variable frequency drives is a specific type of adjustable-speed drive. variable frequency drives are also known as adjustable-frequency drives (AFD), variable-speed drives (VSD), AC drives, microdrives or inverter drives. Since the voltage is varied along with frequency, these electronic ac drives are sometimes also called VVVF (variable voltage variable frequency) drives.

A Programmable Logic Controller (PLC), or programmable controller is a digital computer used for automation of industrial processes, such as control of machinery on factory assembly lines. Unlike general-purpose computers, the PLC is designed for multiple inputs and output arrangements, extended temperature ranges, immunity to electrical noise, and resistance to vibration and impact. Programs to control machine operation are typically stored in battery-backed or non-volatile memory. A programmable logic controller (PLC) is an example of a real time system since output results must be produced in response to input conditions within a bounded time, otherwise unintended operation will result.

The eddy current drives drives are suitable for any general purpose application that involves a AC motor, has full of operation functions. Built-in variable digital/analog input functions to suit a wide array of needs.

Simple eddy current adjustable dynamometer is a totally new concept in dynamic load system for accurate testing applications of all type of electric motors, engines and other rotating machineries, Some of the features of our products are - excellent stability, better accuracy, small and compact, wide range of power and speed, excellent mechanical stability, very little down time and maintenance and low noise-levels.

A scada system includes input/output signal hardware, controllers, hmi, networks, communication, database and software. It mainly comes in the branch of instrumentation engineering. The term scada usually refers to a central system that monitors and controls a complete site or a system spread out over a long distance (kilometres/miles). The bulk of the site control is actually performed automatically by a remote terminal unit (rtu) or by a programmable logic controller (plc). Host control functions are almost always restricted to basic site over-ride or supervisory level capability. For example, a plc may control the flow of cooling water through part of an industrial process, but the scada system may allow an operator to change the control set point for the flow, and will allow any alarm conditions such as loss of flow or high temperature to be recorded and displayed. The feedback control loop is closed through the rtu or plc; the scada system monitors the overall performance of that loop.

Trapped passengers in an elevator in case of a power outrage are rescued by the Auto Rescue Devices (ARD). In the event of power failure during normal operation, an elevator may stop in between floors. Our electronically operated ARD senses the position of the car struck in between floors and moves it to the nearest floor in the most economical direction and completes the rescue by opening the doors at the floor level.