The variable speed drives explained vfd controller operation are common place in industrial ac motor speed controls and rotating equipment. With this electric drive tutorial youll learn how does a variable speed drive work vfd drive working principle, and other industrial drive essentials. Variable frequency drive vfd specifications for onfarm. Im using one of these to drive a 3 hp 3 phase air compressor i picked up for my home shop. A variablefrequency drive vfd is a device that controls the voltage and. Whether youre in facility maintenance, chilled water systems, waste water. A quick overview a vfd controls the speed, torque and direction of an ac induction motor. Thank you for attending the course and thank you to the.
As industry realized the cost savings from vfd freq drive implementation and. This training is held at the eaton variable frequency drive assembly plant in watertown, wisconsin. In order to properly cover the subject, it will be broken into four distinct parts. Variable frequency drive vfd training system learnlab. They are used for running an ac motor at variable speeds or let them. Easily integrate the smartvfd into building automation systems. Learnlabs allenbradley vfd training system is designed for working on real electrical circuits that include a variable frequency drive to control a three phase motor. Electronic speed controllers for ac motors usually convert the ac supply to dc using a rectifier, and then convert it back to a variable frequency, variable voltage ac supply using an inverter. These applications include single motor driven pumps, fans and compressors, as well as highly sophisticated multi drive machines. Save energy, improve control and reduce motor wear using ac drives, also known as variable speed drives vsd, inverters, ac inverter drives, ac drive inverters, ac vfds, hvac drives, or variable frequency drives vfd.
This vfd or variable frequency motor drives training class and system is designed for working on real powered electrical circuits that include a variable frequency drive to control the three phase motor included. Here are the most basic steps in the programming process of ac drives read all manuals included with the box and download any instruction manual andor operating manual. There are a lot of tradeoffs in the different designs and depending on the goals and preferences of the. The following safety and common symbols may be used in this manual and on the equipment. A manual 25 hp exhaust fan is found to run 24 hours 7. A variable frequency drive is like the throttle on a car it adjusts the speed of an hvac fan or pump motor, based on demand, to save energy and prolong motor and mechanical component life. Variable frequency drives vfd training tpc training. It provides a comprehensive, highquality, and costeffective solution to rapidly build student knowledge in vfds and their motor applications. Our vfds handle both low voltage and medium voltage applications, with a. This variable frequency drive basics, is a vfd basics industrial drive training online certificate course.
The variablefrequency drive training system and its. Please read and understand the manual before operating. Find the foremost selection of variable frequency drives on. Students will complete this vfd training course with the ability to lower the cost of vfd operation, thus alleviating the need for hiring costly outside service contractors, all while establishing. Discover the best practices for frequency drives in hvac, pumping, and facility applications.
Ppt variable frequency drives vfd basics powerpoint. Variable frequency drive basics, vfd training online. Ac motor, main drive controller assembly, and drive operator interface 210211 ac motor. We will have 23 different demo vfds for students to work with in class. Variable frequency drive vfd specifications for onfarm pumps 1. Energy savings using a vfd to control the speed of a constant torque load is a direct function of speed reduction. When receiving a new variable frequency drive there are some basic steps that must be taken after the main wiring installation. The vfd training program starts at a basic level and builds, avoiding the need for any technical prerequisite, other than the desire to increase your knowledge and understanding of variable speed drives. The basic configuration of a variable frequency drive is as follows.
Variable frequency ac motor drive output cables are subject to harsh operating settings characterized by high voltage spikes, high noise levels and adverse environmental conditions as the original developer of high quality vfd cable, belden knows how to deliver superior electrical performance and reliability, even in the most demanding industrial environments. Smartvfd variable frequency drives honeywell building. Vfds are used to adjust a motors speed to closely match output requirements in industrial, hvac. Upon completion you will be eligible to become an eaton certified master service provider. Typically, you can save 2050% of energy when using fans and pumps with variable speed drive. Motor control using variablefrequency drives labvolt.
Variable frequency drives vfds popular speed control devices used in industrial, commercial and residential applications. This document applies to variable frequency drive vfd system installations meeting all of the following criteria. Allen bradley powerflex 4 vfd training system learnlab. Knowing basic variable frequency drive training ppt. See the basic principle with the singlephase ac as the simplest example. The variablefrequency drive training system is a stateoftheart training system specifically designed to introduce students to the basic principles of variablefrequency drives vfds. Frequency inverters for 3phase asynchronous motors from 0. A converter is a device to create the dc from the ac power supply.
It is designed for portability and powered using a standard. A vfd allows motorbased systems to adjust the speed at which the motor runs. Drives give south african farmer 40% energy savings. Basic variable frequency drive maintenance tips as we have seen, increasing pressure to improve financial performance is driving a change in the way end users approach control of production, engineering, operations, and maintenance across the manufacturing enterprise. This variable frequency drive basics training software is interactive and has real world simulations. Variable frequency drives troubleshooting larry stanley, regional sales engineer, january 2014. Specifications references used in specification section 1 applicability 1. Visit our north american webstore to order printed copies of popular manuals and sales literature. Programming the vfd variable frequency drive important parameters that need to be programmed in order to use the vfd, variable frequency drive.
Low voltage drives with high power ratings, 90 to 2000 kw. It is sometimes called a sixstep drive because of the voltage sent to the motor. The advantage of using variable frequency drives vfds. Variable speed drives for high performance machines. Students will input motor data into the variable frequency drive, set parameters for speed control and overcurrent protection, and check fault codes. This euromatech training course highlights the relevance of variable frequency drives vfds, also known as adjustable speed drives in the electrical installation. Variable frequency drives ressources naturelles canada. So if you are dealing with a vfd pump, vfd hvac, motor inverter or other ac drive control, this course is a great introduction to the essentials. This variable frequency drives course introduces students variable frequency drives and their applications in industrial plants and commercial buildings. In this variable frequency drive vfd training, participants learn proper design recommendations to ensure that your equipment is as energy efficient and safe as possible. Variable frequency drives vfd, aka variable speed drive vsd have been available for use with a wide range of applications for over 20 years. Variable frequency drives vfd basics 1 variable frequency drives vfd basics 2 what is a vfd. Fan and pump applications are the best opportunities for direct energy savings with afds.
Do not run the air cooled spindles below 7200 rpm pd011. The new ga500 microdrive is designed to help you make complicated tasks simple. Vfds function to adjust motor speed to better fulfill the requirements. The traditional quick start guides will be able to get the motor shaft turning. Huge energy savings potential operating centrifugal fans, pumps and compressors vary frequency of electrical. Vfds and motor control training the electricity forum. A variable speed drive vsd consists of a motor and some form of controller. Maximize energy savings by modulating the speed of fans and pumps. Variable speed drive often uses less energy than an alternative fixed speed mode of operation. Learnlabs vfd training system is designed for working on real powered electrical circuits that include a variable frequency drive to control the three phase motor.
A variablefrequency drive vfd also termed adjustablefrequency drive, variable speed drive, ac drive, micro. The vfdtrainer freq drive training software is a tutorial of the ac frequency drive and related motor control troubleshooting. Eatons variable frequency drives, also known as adjustable frequency drives, are designed and manufactured for applications requiring ultracompact solutions, clean power or future configurability in mind. In the case of riecor farming in south africa an attempt to resolve one problem actually solved it extremely well and, in addition, gave numerous side benefits that decreases costs, work and headaches while making the farmers job easier. This manual is intended to help users of variable speed drives successfully install.
One who has skills and knowledge related to the construction and operation of the electrical equipment and installations and has received safety training to recognize and avoid the hazards involved. Also known as adjustable frequency drives afd, variable speed drives vsd, ac drives, microdrives or inverter drives. Altivar 340 machine drive, atv340, a variable speed drive designed for original equipment manufacturers oems that engineer high performance applications for 3 phase motors with or without sensor from 0. That speed is based on how much power the mechanical systems need to meet the demand of the building. Some types of singlephase motors or synchronous motors can be. They all operate on the same basic variable frequency drive theory. Yaskawa is the worlds largest manufacturer of ac drives and motion control products, including adjustable frequency drives, servo amplifiers, servomotors and machine controllers. All classroom materials, including a workbook and reference guide in pdf and paper format.
Variable frequency drives vfds euromatech training and. Of course, the motor can also be reversed using the front panel. Service provider training focuses on maintenance, diagnosis and troubleshooting of eaton vfd. Variable frequency drive, operation and application of variable. The vsi, or variable source inverter, was the earliest solid state vfd. In this presentation, we will be covering variable frequency drives vfds and their theory, application, and troubleshooting. It takes xed voltage and frequency ac input and converts it to a variable voltage and frequency ac output. An electronic converter which converts direct current dc to alternating current ac is known as an inverter. The areas of greatest opportunity are fans and pumps with variable loads. The ac electric motor used in a vfd system is usually a threephase induction motor.
Students learn how to improve vfd control and efficiency, troubleshoot and fix vfds, reduce equipment downtime, and eliminate chronic vfd problems. Variable source inverter operation is relatively simple. Aka vfd, vsd, asd, drive, inverter, converter, etc. Freq drive training variable speed drives explained. A vfd converts the 5060hz fixedfrequency and fixed. Variable frequency drives online training course tpc. Choosing the right vfd for an application will benefit rotating equipment by providing less wear on the electric motors where applied. Basically, ac input voltage and frequency is converted to dc by rectifiers. Variable frequency drive vfd usage has increased dramatically in hvac applications. Perplexing variable frequency drive vibration problems brian howes1 1beta machinery analysis ltd. Each variable frequency drive basics course training student will receive a detailed vfd specification and check list to use to ensure that all their vfd issues are addressed. Each part of a variable frequency drive has the following function. Vfd training course benefits learn the fundamentals of variable frequency drives.
Failure to follow directions will result in damage to the spindle and the vfd. This training module is designed to familiarize students from beginner or expert with the essential vfd types, features, functions, vfd bypass and benefits of variable frequency drives. These products, hallmarked for quality, performance, and durability, can be customized to meet the most demanding applications. A variablefrequency drive is a device used in a drive system consisting of the following three main subsystems. Manufacturers will apply variable frequency drives to rotating equipment to reduce amperage spikes upon start up of large electric motors. The vfds are now commonly applied to air handlers, pumps. This vfd basics training software use the allen bradley vfd powerflex, the variable frequency drive basics taught can be applied to abb vfd, siemens vfd or any other brands vfd working principle. Vfd training ppt is a vfd training powerpoint input that comprehensively beautifies the doll current, draws ac electric finally by efficient furnishing from the grand scan, and auto rectifies using a balancer.
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