Introduction
The introduction to this video explores a brief history of AC and DC motors. We take a closer look at a typical example of an AC motor. Exploring synchronous and asynchronous motors, the speed of motors, induction motors.
Introduction Part Two
We take a visit to Rockwell Automation to take a closer look at AC induction Motors.
Variable Speed Drives
An explanation of power, speed, rectifying and smoothing. We explore choke and capacitor networks, power transistors, insulated gate bipolar transistors and starting the drive.
Breaking
Examination of braking, advantages and disadvantages to variable speed drives braking, (with reference to rotational regeneration), overhauling and resistors.
Ramp to Stop Breaking
A brief look at the ramp to stop braking method. Not to be confused with soft stop.
Injection Breaking
An insight to the use of injection braking, its advantages and disadvantages.
Dynamic Breaking
We examine the use of dynamic braking, the inertia loads, resistors, preset levels and important considerations.
Regenerative Breaking.
A look at the use of this form of braking, the reasons for the utilization, the conversion of energy, how transistors are switched and waveforms.
Considerations when selecting a VSD
A brief look at the considerations for selecting VSDs for the planning stage. Exploring kinetic and potential energy and different aspects of the operation of the VSD.
Installation
An insight to the best way for installing a VSD. From positioning, whether it be the atmosphere it is used in, or distance between connections and its protection factors.