SVPWM Based VFD drive using 8- bit Microcontroller

Abstract

Induction motors are the most widely used motors for appliances, industrial control, and automation; hence,
they are often called the workhorse of the motion industry. They are robust, reliable, and durable. When power is
supplied to an induction motor at the recommended specifications, it runs at its rated speed. However, many applications
need variable speed operations. For example, a washing machine may use different speeds for each wash cycle.
Historically, mechanical gear systems were used to obtain variable speed. Recently, electronic power and control systems
have matured to allow these components to be used for motor control in place of mechanical gears.
Here an attempt is made to control the speed of Induction motor using generation of variable voltage variable frequency
AC source (VVVF) using microcontroller & electronic devices.
These electronics not only control the motor‟s speed, but can improve the motor‟s dynamic and steady state
characteristics. In addition, electronics can reduce the system‟s average power consumption of the motor.