Trickle-down technology has resulted in modern micro VFDs with capabilities formerly available only on top-tier models.

 

Electric motor speed control is essential for all types of industrial applications, such as with pumps, fans, machinery, and much more. A long time ago, DC motors/drives were the only way to accomplish this. Eventually, the first AC VFDs became available, but only once flux-vector technology was introduced on top models was 100% of the motors torque available across the speed range. Today, flux-vector is available even on the smallest VFDs.

 

Semi automatic cardboard box tape sealing machine
Semi automatic cardboard box tape sealing machine

 

Tiny VFDs with Expansive Features

Today’s entry-level VFDs now include many other high-end features, in addition to good build quality. There are many cases where OEMs, and other end-users, will find need the improved control, safety, and functionality provided by:

       

• Flux-vector control

• Safe torque off (STO)

• Single-phase input to three-phase output

• Sensorless vector control for increased torque at lower speeds

• Advanced networking/communications like EtherNet/IP and Modbus TCP

• On-board closed-loop PID control

• Integrated I/O• A built-in PLC for logic control

 

 

Micro VFD Considerations

Because micro VFDs are so capable and economical, they should be considered for any application where there is even the slightest chance that motor speed may need to be adjusted, and even many applications where motor speed will not be varied. The cost can be comparable to that of a motor contactor and overload combo, and some versions are even available with NEMA 4X ratings, making them suitable for washdown areas.

 

 

Image showing DURApulse AC VF Drives in ascending size order with specifications

 

 
DURApulse GS10 variable frequency micro AC drives are compact and affordable sensorless vector VFDs for three-phase induction motors and PMAC motors. Our most affordable VFD, the GS10 is also the micro AC drive series with the largest range of horsepower available, including support for 460VAC motors.

 

 

 

Advantages for OEMs

OEM machines often use PLCs and motor starters together, but in many cases a micro VFD can provide the functionality of each of these components, and it can also accept single-phase power while operating a three-phase motor. Many end-users today are automating second-hand equipment like lathes and grinders, and they’re finding micro VFDs are often the best solution.

 

Durapulse GS20X VFD

Although basic small VFDs still exist, there are several compelling reasons for OEMs and other end users to use newer and extremely capable VFDs, such as the GSS20X Series. In many cases, these compact VFDs have benefited from the trickle-down effect.

 

 

 

 

Big Features in the DURApulse GS10 Micro AC Drives

 

DURApulse GS10 variable frequency micro AC drives are compact and affordable sensorless vector VFDs for three-phase induction motors and PMAC motors. Our most affordable VFD, the GS10 is also the micro AC drive series with the largest range of horsepower available, including support for 460VAC motors.

 

GS10 Features

  • 120VAC single-phase input/ 230VAC three-phase output up to 1hp
  • 230VAC single-phase input/ 230VAC three-phase output up to 3hp
  • 230VAC three-phase input/ 230VAC three-phase output up to 7.5hp
  • 460VAC three-phase up to 10hp
  • V/Hz control and sensorless vector control
  • For AC induction motors (IM) or permanent magnet AC motors (PMAC)
  • 2-motor control for IM or single PMAC motor
  • DEB (deceleration energy backup) controls motor deceleration during power loss
  • 100kA short circuit current rating (SCCR)
  • Conformal coated circuit boards for improved environmental tolerance
  • Generous built-in I/O including (1) analog input and (1) analog output
  • Built-in dynamic braking
  • PID controller, including sleep and wake modes
  • Built-in RS485 communications (Modbus RTU)
  • Mounting: NEMA 1 conduit box; DIN rail adapter; EMC shield plate; top-wire mounting plate (all optional)
  • UL, CE listed
  • Maximum Frequency Output 599Hz
  • Built-in braking chopper
  • Digital IO: 5 inputs, 2 outputs
  • Compact size
  • Fire Mode - Run fire mode during emergencies to have uninterrupted smoke removal and system pressure
  • Multi-Pump Control and Auto Operation functions
  • Two-year warranty

 

 

 

Image of GS10 Micro VFD with callouts 

Check out the wide variety of VFDs, including micro VFDs, and accessories available in the drives section of our website.

We offer free phone technical support Monday- Friday 8am- 5pm. Phone 1800 633 040

 

 

This article is courtesy of Kevin Kakascik, Technical Marketing Engineer with AutomationDirect with additional content from AutomationDirect.com. The product and company names may be trademarked and are the sole property of their respective owners. Oct 2022 Direct Automation Pty Ltd disclaims any propriety interest in the marks and names of others. All prices shown are exclusive to GST and subject to change without notice. Orders will be accepted at the price ruling at the time of our acceptance of orders. Images are for display purposes only and may be generic. Please consult manuals.