SIRIO AC and ACS single-phase converters are totally isolated from the mains:
- AC-MCF model by optoisolated reference
AC model with firing pulses sent to the gate via transformer, auxiliary power supplies obtained through a transformer complete with rectifiers and stabilizers
- ACS model besides the properties of the AC model, has voltage feedback via transformer and a current feedback via current transformer
Since the wave form is symmetrically split both into positive and negative halfwave, the output voltage average value is not affected and equal to zero. This means that three-phase loads can be fed without generating inside the mesh a circulating current with average value other than zero.
Download the ACS series features
Download the AC-MCF series features
SIRIO 3PH and ALFA 3PHSAP three-phase converters
SIRIO 3PH and ALFA 3PHSAP three-phase converters are suitable to control resistive and inductive loads, which require a linear or ON/OFF voltage variation applied to the load.
For SIRIO 3PH models voltage is directly proportional to the reference signal, while the load current depends on the voltage applied to the load and its impedance.
For ALFA 3PHSAP models voltage and current depend on the control signals and feedback signals since there are stabilizing rings both for voltage and current.
Three-phase converters are mass-produced in the compact series, in a current range between 25A and 600A.
For higher current solutions, electronics and power are separated.
ENERGY SAVING square wave static converters
- Reliability and efficiency typical of semiconductor devices
- High output (about 95%) and the possibility to control high power loads
- Power factor cos(φ) = 0.9, that is no need of power factor correction
- Power taken from the line on each phase in a balanced way
- Simple water cooling system
The electric energy saving with respect to the SRC three-phase machines can reach the 47,6%.
This project constitutes a reliable solution for controlling high powers for sintering of graphite moulds in machines for the production of diamond tools. The sintering process of diamond segments takes place in a controlled atmosphere through the passage of a strong electric current that, by Joule effect, increases their temperature to over 2000°C. Therefore, the power structure proposed is used to control a transformer similar to the one for welding, that is a single secondary turn that allows achieving currents of even 50 kA.