Start Seeing Savings When You Use a VFD With Synchronous Capabilities

July 11, 2019

The savings keep coming when you use a variable frequency drive (VFD) with synchronous bypass and transfer capabilities. It can help reduce up-front capital costs and long-term energy and maintenance costs in various motor-control applications. And along with the cost savings, the VFD can help you increase efficiency and achieve more flexible process control.

A VFD with synchronous capabilities allows you to operate one motor continuously with variable speed control or to start and synchronize multiple motors. It also gives you the ability to soft start large motors.

So, take the time to see if the drive is right for your operations. It could put you in the good graces of everyone from technicians on the plant floor, who have fewer parts to maintain, to the CFO, who’s looking to rein in energy costs in production.

Operating One Motor

In this application, the VFD operates the motor continuously with variable speed control and can transfer the motor to the bypass source when necessary.

This application can increase overall system efficiency to achieve energy savings. And it can deliver more savings by removing, or not requiring, the use or maintenance of certain apparatuses.

In fan applications, for example, dampers can be removed or left open, because they’re no longer required to obtain variable airflow. And in pumps, valves can be left open, because they’re no longer required to provide flow control.

Operating Multiple Motors

Here, one VFD can start and synchronize multiple motors. This can reduce your full load current and your energy consumption and optimize your process.

The number of motors that can be operated is limited by external factors, like bus capacity and cabling limitations. But in some instances, the synchronous transfer application has been successfully applied to up to a 10-motor system.

There are two possible options in a multi-motor application. First, all motors can be of equal rating. Second, a range of motor horsepower can exist. In this second scenario, the drive system must be sized for the largest motor’s horsepower but also be able to control the smallest motor.

Soft-Start Application

This application is used to start motors, accelerate to full speed and transfer to the bypass source.

The drive is not intended for continuous application. Therefore, the ampacity rating of the drive can be reduced to match the starting requirement for the load. The drive is not rated for the motor horsepower rating, only the starting horsepower requirement.

Ready, Set, Save

To learn more about how VFDs with synchronous bypass and transfer capabilities can keep dollars in your budget and optimize your motor control, visit their website.

Related Articles



Editor’s Pick: Featured Article

Weidmüller’s u-control 2000: The Automation Controller

Weidmüller’s u-control 2000: The Automation Controller

Weidmüller’s scalable engineering software, u-control 2000, adapts individually to your requirements. And, the u-control is powerful, compact and fully compatible with Weidmüller’s I/O system u-remote. This article looks at what makes u-control the heart of your automation.

Programmable logic controllers (PLCs) are one of the main components of any automated system. A typical control system has inputs, outputs, controllers (i.e., PLCs), and some type of human interaction with the system, a human machine interface (HMI), for example.

Read More



Latest Articles

  • Helping McMaster University Adapt its Buildings for the Future

    Helping McMaster University Adapt its Buildings for the Future

    February 22, 2024 McMaster University is using technology to better control and manage its legacy thermal systems and create smarter buildings McMaster University is using technology to better control and manage its legacy thermal systems and create smarter buildings. Carmichael Engineering Ltd., a Canadian systems integrator, worked closely with ABB Canada’s leading experts and its highly… Read More…

  • Grid Transparency Behind-the-Meter Is Key Challenge for Power Utilities, Study Reveals

    February 20, 2024 Siemens has released key insights into how electric utilities in the United States and Canada are managing the rapid adoption of behind the meter distributed energy resources (DERs) in its new report “Seeing behind the meter: How electric utilities are adapting to the surge in distributed energy resources.”  Data from the study… Read More…