VFD Control panels

What is a VFD Control?

A Variable Frequency Drive (VFD) is an electrical device used to start and control the speed of an AC induction motor using variable frequency (Hz) and voltage. A VFD Control System consists of a VFD and associated motor control or circuit protection devices enclosed in an AC control panel. The most common NEMA ratings for VFD control panel enclosures are NEMA 12, NEMA 3R, and NEMA 4x. A VFD control panel typically includes a range of control panel components such as VFDs, harmonic filters, line reactors, surge protectors, a bypass, circuit breakers, motor starters, soft starters, and some form of cooling unit. Because VFDs are used in a wide variety of applications, VFD control panels are available in various power ratings and are also used to control heavy-duty equipment in large industrial applications, such as pumping and drilling; elevators, rock crushers, water and wastewater treatment plants, and agricultural systems, among others. VFDs used for water conservation purposes are also effective in various applications such as water pumps.

WULHD Smart Series VFD

WULHD, our VFD product is at the forefront of adding top-tier intelligence, including our own Internet of Things (IoT) platform, enabling remote monitoring and control of VFDs. To ensure uninterrupted operation of your production, you can even set alert thresholds and notifications to reduce Mean Time to Repair (MTTR) for your facilities.

VFD Control Systems Solution

WULHD is a comprehensive service provider for AC drive VFD Package Solutions. We can customize your VFD according to your needs and specifications, ranging from fractional horsepower to large (1000+ horsepower) motors. Below, you can find a list of our most common applications and features, including AC motor speed control.

Energy Saving

VFD’s provide real energy cost savings by controlling the number of amps a motor draws. According to the Environmental Protection Agency (EPA), using Variable Frequency Drives can result in energy cost reductions of 50% to 85%. This represents a much larger decrease than the use of mechanical flow control devices like dampers or valves.

Example

Replacing a damper-controlled fan system with a variable speed control system for a 20Hp (15kW) motor operating at the specifications of requiring 85% airflow for 2,000 hours/year and 60% airflow for another 2,000 hours/year.

 

Energy required using damper control: 50,100 kWh/year

Energy required using drive control: 24,900 kWh/year

Energy savings using drive control: 25,200 kWh/year