Phase Changer Single to Three Phase Power Converter 4kw/5.5hp

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Phase-Changers are based on the proven technique of a rotary conversion which has been extensively used for the last 50 years - however we've added some very important new technology improvements.Traditional converters are quite simple, and basically use single phase power, a transformer and a few fixed value capacitors to create a phase shift in order to make a pilot 3 phase motor rotate. Once this pilot motor is spinning the start capacitors are disconnected and the motor also becomes a generator, creating the missing phases. Fairly crude 3 phase power can then be drawn off it to power other equipment.Traditional rotary converters have always had performance limitations that cannot be reliably overcome with traditional control techniques such as mechanical switching. To compensate, rotary converters have needed to have a dramatically oversized pilot motor to cope with the high starting currents of external loads and to provide some level of output voltage stability. Typically, voltages between phases can become quite unbalanced as the size of the connected load varies. This can lead to motor vibration, motor noise, poor machine performance, motor heating, excessive & inefficient power consumption and even motor and machine failure.Voltage outputs can be changed by varying the capacitance in the circuit, however the standard approach of using contactors or relays to switch in and out capacitor banks is destined to rapid failure. Capacitors store very large amounts of electrical energy. Contactors & relays are mechanical switches that turn on randomly at any part of the AC sine wave cycle. Connecting the capacitors to the converter circuit at the wrong time of a cycle will create massive arcing & damage across the contacts of the contactor and creates stress on the capacitors themselves, shortening their life.Phase-Changers are based on the rotary converter technique, it is well known and proven, despite it's performance limitations. What we have done is added the "smarts". By using the best current micro-controller technology available, we have dramatically enhanced the performance of the rotary converter. By continually monitoring the output of the converter, the micro-controller controls the value of the capacitors required for "ideal tracking". Using high voltage industrial solid state switches called thyristors, capacitor banks are switched in and out quickly and silently as determined by the micro-controller in 9 distinct levels. All switching is done with precision while the AC sine wave is at zero volt potential ensuring there is no stress to either the capacitors or to the thyristors themselves.In the real world of the connected load, this means that the quality of the generated 3 phase is comparable or in some cases better than that of a utility 3 phase power supply. The ability to reconnect any capacitor bank automatically based on real world load conditions, means that a Phase-Changer can access this stored energy at anytime to hardstart or boost machines with high mechanical loads.