The chapter presents a flow chart to assess the suitability of using a variable frequency drive (VFD) in a positive displacement pump system. It is essential to commence the pump system selection with the hydraulic requirements and to work systematically to select the pump, the motor, and the ...
Power cable between the inverter and motor is a key component in the drive-motor assembly and is regularly overlooked. This paper describes a new solution for cables used with Insulated Gate Bipolar Transistor (IGBT) Variable Frequency Drives (VFD's). A new cable solution that includes the use...
Associate tlalemand@cee1.org 617-337-9289 Motors & Motor Systems Committee Consortium for Energy Efficiency 98 North Washington Street, Suite 101 Boston, MA 02114 Xcel Energy is a sponsor of Motor Decisions MatterSM (MDM), a public awareness campaign managed by the Consortium for Energy ...
Braided tray cables present additional issues that adversely impact performance in VFD applications. Because the braid can only offer a percentage of total coverage and braid strands move when the cable is installed with bends, these gaps allow EMI to radiate, compounding the risk to the motor and...
For frequent short-time overload running motors, it is necessary to calculate the overload cycle, it requires the VFD maximum output current Imax is bigger than the peak current of the motor, and the VFD's I2t is within its allowable range. It may select a higher level VFD. For example...
It goes without saying that the fan, motor and VFD selection are vital, but so is the business side. It quickly gets the salesperson the results they need to sell your products and give you the edge over your competitors. Fast and accurate With nearly forty years of working in the air...
The material could vary depending on factors such as the season of the year, ore body, or blasting and blending patterns. Two types of drives that are best for variable speeds are a mechanical drive using a gear reducer, inverter duty motor and variable frequency drive (...
For example, at Occidental College in Los Angeles, Zebbs Pascua, a utilities supervisor, replaced a 30-hp, dual-speed motor with a new, Premium efficient motor with a VFD. The building is set up to run 24/7, but, as with most buildings, it has periods of higher and lower energy use...
An additional sensor may be required at the head of the machine if speed is adjustable, for example with a VFD. In that case, the ratio of tail speed: head speed is monitored for belt slippage and slowdown. Note: When installing a speed sensor on a shaft in an underground boot pit ...
When you choose the type of frequency inverter, please select the actual motor current value as the basis, the motor rated power is only for your reference. In addition, please take full consideration of high harmonics from the frequency inverter. The high harmonics will make the motor power ...