• Home
  
  
• THE COMPANY
  
  
• OUR PRODUCTS
  
  
• Varimatik®
  
  
• SERVICE
  
  
• PROJECTS
  
  
• EcologY
  
  
• TO FIND US
  
  
• Cont@CT

INVERTER

A limitation of asynchronous motors is in the fixed speed, which is linked to the frequency of the electrical system. (50 HZ in Europe).
We can guess how much energy is wasted during the hours of partial load. The compressor, working at a higher speed than necessary, must replace the vacuum of one part of the gas that is compressed uselessly, dissipating a part of the completed work.

At home, when we don’t need maximum illumination, we can install a dimmer switch to regulate the quantity of light based on the user’s needs, saving electrical energy and obtaining the most adequate lighting.
To do the same type of regulation for industrial motors, particular electronic circuits of power called inverters. Inverters are able to feed the electric motor with a variable frequency. Since the speed of the asynchronous motor is linked to the frequency, one can obtain a fine and continuous control of the function of the machine.
The advantages of the inverter are not limited to the possibility of regulating speed. Thanks to their flexibility, they have the following benefits.

• Soft start functioning: in electrical motors, the start is a delicate phase.
  The absorbency of electricity reaches a value 6-8 times the ideal value, while the force applied to the shaft provokes a sudden start.
  As a result, the electrical lines have to be larger, this way like the mechanical components are moved.
  With the inverter, the electricity and the torque are limited. The start doesn’t provoke tension drops on the electrical system and limits the torque. With the inverter, mechanical use and plant costs of installation are reduced.

• Power factor correction: the inverter is always able to start a motor in optimal condition. The instruments the inverter uses, thanks to the large capacity component, have load factors at almost resistivity. Normally instruments with inverter have a power factor of .95.

• Overboost: the inverter is able to move the electrical motor even at higher speeds compared to normal speeds. There is, therefore, an increased functioning, and is therefore capable of covering unforeseen load peaks.

• Protection: the inverter, communicating with the central control of the machine, can reduce the power of the motor when parameters of the system are anomalous. For example, when the temperature of the winding reaches abnormal levels, the inverter intervenes, allowing them to cool.
  In this way, we can avoid blocking the motor because of thermal overload.
  

Back to ''Varimatik''