A module is a separate unit of software or hardware. Typical characteristics of modular components include portability, which allows them to be used in a variety of systems, and interoperability, which allows them to function with the components of other systems.
The symbol for SCR is also shown in figure which is very familiar to Diode's Symbol. An SCR is a short form for Silicon Controlled Rectifier, Which is a three terminal semiconductor device.This device is used for rectification, regulation and inversion etc. It is also used as a controlled switch in high rating instruments. That is why this device has such importance.It is a Unidirectional Power Switch.he symbol for SCR is also shown in figure which is very familiar to Diode's Symbol. An SCR is a short form for Silicon Controlled Rectifier, Which is a three terminal semiconductor device.
They are a type of voltage. controller. Variable speed drives ensure gradual. acceleration and deceleration and enable speed. to be matched precisely to operating conditions. Controlled rectifier type variable speed drives are. used to supply power to DC motors and. frequency inverters are used for AC motors. Historically, drives for DC motors appeared first. Reliable and cost-effective frequency inverters. appeared as a result of advances in power. electronics and microelectronics. Modern. frequency inverters can be used to supply power. to standard asynchronous motors with. performance levels similar to those of the best. DC variable speed drives.