FAQ
1
What is the three-phase four-bridge design that InBev has always claimed? What are the advantages?
Simply put, the three-phase four-leg technology is based on the traditional three-phase three-leg inverter, adding an independent fourth leg, an advanced topology specifically used to control the neutral line (N line) current. Traditional three-phase three-arm inverter: There are only three bridge arms (U, V, W), and each bridge arm outputs one phase of live wire. It usually requires a power frequency or high frequency isolation transformer to provide a neutral point and achieve electrical isolation and level conversion. If there is no transformer, the neutral point potential is floating, and the neutral line of the load cannot be directly connected, making it difficult to handle three-phase unbalanced loads. Three-phase four-leg inverter: has four independent H-bridge or half-bridge units. The first three bridge arms are still responsible for outputting the U, V, and W three-phase live wires, while the newly added fourth bridge arm directly generates and controls the current and voltage of the neutral line (N line).
The advantages are:
①Excellent three-phase unbalanced load capacity
② Eliminate problems caused by neutral current
③No need for power frequency transformer to achieve high efficiency and high power density
④Strong reactive power compensation and harmonic management capabilities
⑤ Better support microgrid operation
2
What are the SiC components used in InBev smart storage inverters and what are their advantages?
In inverters, SiC components mainly refer to power devices made of silicon carbide (SiC), a wide-bandgap semiconductor material. It replaces traditional IGBTs and ordinary silicon diodes based on silicon (Si) materials.
Products using SiC have the following advantages compared to IGBT:
①Improve system efficiency and increase power station revenue
②Reduce size and weight, and reduce system cost
③Increase switching frequency and optimize filtering effect
④Improve system reliability
3
How does InBev Intelligent Storage achieve the EMC (electromagnetic compatibility) capabilities required by regulations?
EMC is divided into EMI (Electromagnetic Interference): electromagnetic interference emitted by equipment. and EMS (Electromagnetic Susceptibility): the two parts of the device's ability to resist external interference. The Inpower inverter module has a built-in AC and DC filter unit, which requires no external magnetic ring or filter module. The main body directly passes the IEC61000-6-2/-4 electromagnetic compatibility test. At the same time, when integrating BESS, electromagnetic related requirements will also become an industry problem. For example, the Radio Equipment Directive (RED) is the European Union’s mandatory certification directive for radio equipment. System-level testing refers to verifying electromagnetic compatibility (EMC) and wireless performance of the energy storage system (including wireless communication modules) as a whole, rather than just testing independent communication modules. Considering the complexity of electromagnetic issues during system integration, a PCS with a larger electromagnetic compatibility margin will greatly reduce the overall difficulty of system integration. When integrating the whole cabinet, in the face of complex electromagnetic problems and more stringent classA tests, InBev PCS more strictly suppresses conduction and radiation interference from the source, leaving a larger margin for the whole cabinet test, avoiding common problems such as "layout confusion and maintenance difficulties caused by external filter components" common among competitors, improving system integration efficiency and reducing debugging costs.
