Business description

Installing variable frequency drives (VFD) are one of the easiest ways to save a significant amount of the energy required to run fans and pumps.

Most fan and pump devices are very inefficient when running at part-load conditions, so installing a VFD drastically reduces the energy consumed during those part-load periods.

Over the typical life cycle, a VFD greatly reduces the total cost of operation.

VFDS LLC is a leader among variable frequency drive suppliers.

Our company concentrates on VFD design and VFD manufacture.

VFDS LLC is america VFDS Company located in Los angeles.

Our main focus is creating the highest quality products.

The main products single phase to three phase VFD, three Phases to three Phase VFD and so on.

Variable Frequency Drive (VFD) can be used to control the speed of three-phase induction motor.

A variable frequency drive is a system equipped for controlling the rotational speed of an alternating current (AC) electric motor by controlling the frequency of the electrical power supplied to the motor.

A VFD drive supplied from a 3 phase system will have a bank of rectifiers at the input feeding a capacitor bank.

The capacitor bank serves two purposes --- to filter some of the input ripple from the rectifiers, and to absorb some energy during deceleration.

Rectifier-capacitor input filters produce non-sinusoidal pulses of current in the input lines.

This means the RMS input current is higher than if the same energy was transferred from a DC source.

If you take a VFD drive designed for a 3 phase input and use it on a single phase system, then the diodes and the filter bank may be under sized.

This is why you may need a 3 times larger VFD.

It is not because of the DC to AC conversion electronics, but because of the input diodes and capacitors.