[!UPDATE] {docsify-updated}
Please see the general ADVANTICS application whitepapers for more detailed examples. The following chapter simply presents several typical applications.
A basic 30 kW 3-phase charger, using ADM-PC-LF45 as a filter stage and inrush limiter, ADM-PC-BP25 as a Power Factor Correction stage, and the ADM-PC-LL25 as a unidirectional isolated DC/DC converter.
An advanced 3-phase fully bidirectional charger, capable of charging vehicles with 30 kW power, and extracting power back towards the grid. This configuration consists of ADM-PC-LF45 as a filter stage and inrush limiter, ADM-PC-BP25 as a Power Factor Correction stage, followed by ADM-PC-BI25, an isolated bidirectional DC/DC. The last stage is another ADM-PC-BP25, this time connected as a bidirectional Buck, regulating the 1000 V DC bus of the isolated DC/DC down to required voltage and current for EV charging/discharging.
Step down bidirectional DC/DC. The left side voltage must always be higher than the right side voltage for the application to work. Overlapping voltages (like charging 400V battery from a 400V battery) are not possible.
Step up, followed by a Step down DC/DC. Removes the limitation of a simple Bidirectional Buck, as now the voltage regions can overlap. The first stage (no matter from which direction) is always a Step up. Then this voltage is stepped down to provide the Voltage and Current regulation.
In the case of having batteries as source and loads we recommend to modify dynamically the DC bus voltage for a better efficiency and lower losses. This is because losses will be lower for a lower voltage ratio (input to output voltage difference). Hence, the DC Bus voltage can be selected as:
V_dc_setpoint = MAX(V_bat_source , V_bat_load) + 100; (+100 is added to allow for some regulation margin).
It is also possible to use modules in parallel, to increase the total power.
An example of a much more complex system, control-wise. Two ADM-PC-BP25 modules are used, with one always providing boost on two phases, and third phase is used to generate Neutral wire (50% duty cycle). The second ADM-PC-BP25 is then used to generate L1, L2, and L3 phases. This configuration then allows for several modes of operation - 3-phase+Neutral power inverter, 1-phase charger (to refill the built-in battery), and a 3-phase charger. The following diagram illustrates these three modes.
