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Richard's Discussions

Benefits of variable frequency drives (VFDs, frequency inverters) (part 2)

Started this discussion. Last reply by Satyadev Vyas Jun 5, 2019. 2 Replies

Continued from the article: Benefits…Continue

Benefits of variable frequency drives (VFDs, frequency inverters) (part 1)

Started Jun 23, 2011 0 Replies

AC induction motors, the workhorses of the industry, rotate at a fixed speed. The fixed speed of AC induction motor is determined by the frequency of the supply voltage. Adding a variable frequency…Continue

Tags: drives, variable, inverters, frequency, VFDs

Energy consumption of different speed control techniques in HVAC application

Started Jan 11, 2011 0 Replies

It's said that 40% of all power in Europe and North America is consumed in  the buildings. The biggest share of the energy is consumed in heating, ventilation and air conditioning (HVAC)…Continue

Tags: variable, drives, speed, energy, consumption

Blog of frequency inverters,variable speed drives,variable frequency drives...

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Satyadev Vyas replied to Richard's discussion Benefits of variable frequency drives (VFDs, frequency inverters) (part 2)
"The huge energy can be saved if the VFD is installed for fan and pump application. Also, the process control becomes better with use of VFDs. The higher electric and mechanical stress can be avoided as the V/F ratio is increased gradually."
Jun 5, 2019

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Shenzhen POWTRAN Technology Co., Ltd.
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Supplier of frequency inverters, VSD, variable frequency drives, adjustable speed drives,frequency converter,vvvf drives...
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motor control, motion control
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Richard's Blog

applications of AC variable speed drive (frequency inverter)

Posted on March 14, 2012 at 1:47am 0 Comments

applications of AC variable speed drive (frequency inverter)

AC variable speed drives (frequency inverters) are widely applied in the industry today. There are three major areas, where drives and motors are applied.

1. Constant torque applications

This is where the same amount of torque is required at low speed as…


pumps and frequency inverter (variable speed drive)

Posted on March 8, 2012 at 7:12pm 0 Comments

pumps and frequency inverter (variable speed drive)  

All of us know that frequency inverters are widely used in many applications for energy saving. They are tools that is used to change the frequency of electricity.

Below is application of frequency converter used for pumps.

Usually pumps are sized to cope with the maximum predicted flow, leading to the motors running at part load. The result is low motor efficiency and a low power factor which…


closed loop vector control AC drive (frequency inverter, VSD)

Posted on January 11, 2011 at 4:51am 0 Comments

World class high performance closed loop vector control AC drive (frequency inverter, VSD)Applications:

Cranes and hoists, Winding, Material handling, Automotive testing, Extruding, Intelligent Drives...

Power rating : 0.4 kw ~630.0 kw (less than 1 hp to 840…


Comment Wall (10 comments)

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At 7:15am on November 1, 2010, Mario Luis Leyva Carballo said…
gracias por enviarme el Link a tu página, y en Español!
Thanks for the link to your site, in Spanish!!!
At 4:52am on September 23, 2010, David Earl Lynch said…
I've worked as a Electrical Process Control Tech in the past and I am interested reading your blog regarding Frequency Converters. Most of my experience has been with Siemens Drives. My most recent experience has been with teaching and using AutoCAD, creating Electrical and Mechanical Design drawings. It so happens that I am just starting work for a Tobacco Processing Facility that sells most of its output to China. We have Chinese Quality Inspectors working on-site.
At 9:22am on September 8, 2010, Ivan said…
Hello Richard, greetings from Mexico.
I'm a mechanical design engineer.

Thanks for adding me as your friend.
At 5:04am on September 8, 2010, Ali said…
Hi my friend;
pleasure to meet your here, where we meet together before please?
At 8:34am on September 7, 2010, Scott Torres said…
Hi Richard, good to meet you. My company has a division in Chaozhou. It's a small world these days.
At 5:23am on September 6, 2010, Mario Luis Leyva Carballo said…
Hi, Richard, it's a pleasure to meet you here
Hola, Richard, es un placer encontrarte aquí
At 1:21am on September 6, 2010, Robert D. Miller said…
Welcome aboard, Richard. Always good to meet young outgoing people in the engineering field.

Bob Miller
At 11:44pm on September 5, 2010, Sello Mapota said…
Hi Richard,

It is a pleasure to connect to more engineers like you,
At 1:35pm on September 5, 2010, Jeff Robertson said…
Hi Richard
Pleased to meet you.
At 11:42am on September 5, 2010, Diego German Canedo Texon said…
Hello the pleasure is mine.
I'm from Mexico, i study mechatronics.


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