Electrical Drive have become the most essential equipment now a days in the electrical motors and other rotating machines. We know that electrical drives mainly accomplish three kinds of work, Starting, Speed control & Braking.
It can be said that the electrical drives enable us to control the motor in every aspect. But control of electrical drives is also necessary because all the functions accomplished by the drives are mainly transient operations i.e. the change in terminal voltage, current, etc are huge which may damage the motor temporarily or permanently. That’s why the need of controlling the drives rises and there are various methods and equipment's to control different parameters of the drives. In very simple words, the systems which control the motion of the electrical machines are known as electrical drives.
A typical drive system is assembled with an electric motor (may be several) and a sophisticated control system that controls the rotation of the motor shaft. Now a day, this control can be done easily with the help of software. So, the controlling becomes more and more accurate and this concept of drive also provides the ease of use.
There are many types of VFD which are based on motors types.
1. AC Drives for AC motors like Induction Motor
2. Stepper Drives
3. Servo Drives
4. DC Drives for DC motors
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