Soft Start and Inverter

With the Altivar inverter, induction motor can be adjusted in a wide range. Many applications not only require a wide range of rotation but also the stability of rotation of the desired reference value. To answer this need, it must be installed a control system.

Induction motor consists of two main parts, namely the stator and rotor. Stator is the part that does not move, consisting of layers of metal with grooves containing the coil-coil. Coil-coil is connected to 3 phase power source, to obtain a rotating magnetic field. The speed of rotating magnetic field depends on

number of stator poles and the frequency resources. This speed is called the synchronous speed, which is determined by the formula :

  Ns = 120 f
P

With Ns is the synchronous speed (rpm), f is frequency resources (Hz), and P is the number of stator poles.
 
The inverter is a device that can be used to convert the 3 phase power source into DC voltage which is then converted back to 3 phase power source with the appropriate frequency. This method can be used because it is known that induction motor synchronous speed is proportional to the frequency of its resources.

PLN has the resources of a constant frequency, which is 50 Hz. One effective way to produce a voltage with a frequency that can be regulated is by way of their own raises. For that we need a DC power source. This resource is derived from PLN's resources are rectified by the rectifier. Furthermore, these resources are filtered with filter DC to get DC power source that is more flat. Then through a series of switches (referred to as a bridge inverter) that can be controlled in such a way, those resources can be converted into 3 phase power source at the end of the load. By way of controlling the switching time of these switches using PWM signals (Pulse Width Modulation).

By using the inverter, it will be many technical advantages obtained when compared with other ways. Some benefits include: having a wider range of speeds, has some pattern to the relationship of voltage and frequency, has a facility designation meters, has a slope of acceleration and deceleration that can be set independently, compact, and more secure system.

Soft Starter and Variable Speed ​​Drive Altistart Altivar offer you something more simple, concise, open and flexible :
q version of ready to wear
q Use PowerSuite software,
q Lots of options for communications networks.
Evolution and there are many new features to increase your production capacity.

Power Suite :
A unique software for all Altistart and Altivar
Adjust the settings as minimal as possible!
q Simplify the definition of the parameter,
q Prepare and print a configuration,
q Comparison of documents,
q Reproductive fast for similar applications,
q Remote Monitoring.

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