Drive Basics

An overview of Variable Frequency Drives (VFDs) and their applications in industrial and commercial settings. Explains the basics of VFDs and their importance in controlling speed, flow, and pressure in various systems.

Different methods of starting a motor without utilizing a drive, including Variable Speed Drives and manual starters with motor overload protection.

Details on the components that make up a Variable Frequency Drive and how they function together to control motor speed and torque.

Examples of industrial applications that benefit from VFDs, such as conveyors, presses, and high-speed machining applications, which require precise control and energy efficiency.

Explanation of how VFDs are used in commercial settings to control speed, flow, and pressure in systems like pumps, dampers, and cooling towers, leading to energy savings and improved performance.

The benefits of using VFDs to operate motors over a wide range of frequencies, enabling better control, energy efficiency, and customization for specific applications.

Different control methods of VFDs including Voltage by Frequency Control, Closed Loop Vector Control, Zero Speed Motor Control, and Permanent Magnet Motors, each suitable for specific applications based on motor control requirements.

Explanation of the Inverter section of a VFD, including the use of Insulated Gate Bipolar Transistors (IGBTs) to produce simulated three-phase power for the motor.

Insight into Pulse Width Modulation (PWM) scheme used in VFDs to control motor speed by adjusting the ON and OFF times of the waveform pulses, creating smooth and precise voltage output.

Review questions on VFD operation and components, followed by a conclusion highlighting Yaskawa's expertise in manufacturing AC drives and providing reliable solutions to customers.