Induction motor speed contollers vs Variable Frequency Drives
Induction motor speed contollers vs Variable Frequency Drives
(OP)
Hi guys!
I have experience in several occasions installing Induction Motor Speed Controllers, one in a water desalination plant and others in process control environments. I would like to share the experience you guys have and how you rate the unit against Variable Frequency Drives. If anybody is interested in what I am talking about following link will be helpful as it contains details and clips as well.
http://www.magnadrive.com/md_asd/how_it_...
I have experience in several occasions installing Induction Motor Speed Controllers, one in a water desalination plant and others in process control environments. I would like to share the experience you guys have and how you rate the unit against Variable Frequency Drives. If anybody is interested in what I am talking about following link will be helpful as it contains details and clips as well.
http://www.magnadrive.com/md_asd/how_it_...





RE: Induction motor speed contollers vs Variable Frequency Drives
RE: Induction motor speed contollers vs Variable Frequency Drives
These drives are called by various names, Induction Motor Drives, Adjustable Speed Drives(ASD), Magnetic Speed drives
RE: Induction motor speed contollers vs Variable Frequency Drives
http://www.magnadrive.com/about_md/video...
The application show savings in energy, lower maintenance costs, no harmonics and spikes, the same footprint, etc.
This is very impressive.
However, the motor starting was not addressed. If DOL, then the usually mentioned disadvantages of the DOL on the motor stays, on the motor load disadvantages are eliminated because of Magnadrive.
The motor magnetizing branch in the motor electrical equivalent circuit is constantly energized with the motor terminal voltage being meant constant. The means that the motor works at the motor terminal rated voltage and frequency parameters.
The shaft load will vary due to Magnadrive settings and controls. This implies that the motor power factor and efficiency vary according to the shaft load conditions.
The posted video link includes applications with energy savings that are appealing to the customer.
The Magnadrive efficiency, controls, reliability, cost, etc. need to be taken into consideration when comparisons are made with VFDs.
RE: Induction motor speed contollers vs Variable Frequency Drives