2hp 1 5kw Vfd Cheap Price Drives - USA

Single phase VFD drive normally is used in 200V AC to 240V AC in low power applications, like small pumps.

The AC motor's input need to be three phase as all of the drives are three phase output.

In our factory, the 1 phase AC drives, from 0.4kW to 2.2kW.

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A VFD consists of a rectifier/filter section which converts the incoming AC to DC.

This high-voltage DC is then converted back to AC with additional controls which provide the speed control.

The problem with single-phase AC power is at the input side of the VFD, the part that converts incoming power to DC.

When you rectify a three-phase power source, the output voltage from the rectifier never drops below 50% of the peak voltage.

This makes it real easy to filter and provide pure DC to the rest of the equipment.

However, when you rectify single-phase power, the output voltage of the rectifier drops to zero 120 times a second.

The task of filtering this to provide pure DC is much more difficult.

The standard rule-of-thumb is to derate the VFD by 50% when operating from a single-phase source.

Thus, if you want to run a 5HP motor, you need a VFD rated for 10HP.

I would not recommend operation of any VFD on single-phase power unless such usage is proper according to the manufacturer.

If not discussed in the owner's manual, you can always contact the maker's technical support department and ask for assistance.

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.

Company Contact:

• Posted By: VFDS LLC

• Phone: +1(310)6421125

• Address: 8235 W. Sunset Boulevard, Los angeles, California , USA

• Email:

• Website: http://www.vfds.org/

• 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.