High Laminated BusBar For Voltage Explosion-proof Inverter
Products Description
This High Laminated BusBar for Voltage Explosion-proof Inverter is an integrated rigid busbar assembly formed through vacuum hot-pressing, comprising multiple layers of high-conductivity copper conductors, high-performance insulating media, and structural supports.
Topology: Features a multi-layer symmetrical stacked structure-such as "Positive–Insulation–Negative" or "Positive–Insulation–Negative–Insulation–Neutral"-determined by the voltage class and topology (e.g., 2-level or 3-level NPC).
Insulation System: Interlayer dielectric materials typically include polyimide (PI) film, epoxy glass cloth (FR4), or DBC (Direct Bonded Copper) ceramic substrates, selected based on voltage withstand ratings and thermal dissipation requirements.
Housing Compatibility: The overall form factor is custom-bent and machined to fit the internal space of explosion-proof enclosures; terminal interfaces are designed for direct connection to mainstream IGBT modules (e.g., Infineon, ABB, Hitachi Energy) or laminated capacitors.
Environmental Rating: The assembly supports an IP65+ sealing design and is compatible with positive-pressure ventilation or oil-immersion cooling schemes within the explosion-proof chamber.
Key Functions and System Performance
High-frequency transient voltage clamping
By utilizing extremely low distributed inductance, they limit voltage spikes during IGBT turn-off to within the device's Safe Operating Area (SOA), thereby preventing overvoltage breakdown and enhancing the operational reliability of high-voltage variable frequency drives and UPS systems.
Structural support
Serving as a physical interconnect for core power components-such as capacitors and IGBT modules-laminated busbars provide robust mechanical support. They protect delicate power module terminals from mechanical stress caused by vibrations during transport or electromagnetic force impacts.
Stray electric field shielding
The ground layer within the multi-layer composite structure not only provides a zero-potential reference but also acts as a natural electromagnetic shield, effectively blocking high-frequency magnetic field interference (EMI) from the power circuit to surrounding control circuits and improving the system's electromagnetic compatibility.
Material Advantages: End-to-End Quality Control from Conductor to Insulation
| T2 Oxygen-Free Copper Conductors | High purity translates to lower resistivity and reduced heat generation. The machining precision of the BusBar with PET Insulating Papers directly determines the parallelism and spacing consistency between layers after lamination-factors that directly influence the product's inductance characteristics. |
| High-Performance Insulation Materials | For high-voltage, explosion-proof variable frequency drive (VFD) applications, insulation materials must not only possess high dielectric strength but also maintain stable insulating performance over the long term in harsh environments characterized by humidity, dust, and corrosive gases. |
| Conductor Surface Treatment | Surface treatment of contact areas (tin, nickel, or silver plating) affects not only contact resistance but also the Power Distribution Unit BusBar's long-term resistance to oxidation and corrosion. This distinction is particularly critical in environments containing corrosive gases, such as coal mines and petrochemical facilities. |
Detail Showcase and Quality Control Aesthetics
Precise control of edge resin bleed-out
Superior hot-pressing processes ensure that the adhesive film forms a uniform, minimal bleed-out band at the edges; this guarantees a moisture-proof seal without creating excessive resin buildup that could interfere with assembly.
Stepped extension of insulation layers
At the edges of layers with different voltage ratings, the insulation films are clearly staggered in a stepped configuration according to design specifications. This design ingeniously extends the surface creepage distance without increasing the product's overall volume-a tangible example of smart electrical engineering.
Micron-level coplanarity of terminal surfaces
All Motor Controller BusBar surfaces intended for connection to external components undergo precision milling to ensure exceptional coplanarity. This guarantees uniform pressure distribution on the IGBT module baseplate during bolting, preventing internal fractures in the Direct Bonded Copper (DBC) substrate caused by installation stress.
Clear laser marking system
Without compromising insulation performance, laser engraving is used to mark positive and negative polarities, phase designations, and QR codes for traceability; this facilitates error-proof assembly and quality tracking during subsequent operation and maintenance.
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The Laminated Busbar for Electric Car is more than just an electrical connection component; it is a critical foundation for ensuring the high-efficiency, high-reliability operation of high-power power electronics equipment.
Leveraging an optimized laminated structure, a combination of high-performance materials, and precision manufacturing processes, this product enables equipment manufacturers to overcome connectivity challenges in environments characterized by high voltage, high current, and space constraints. It provides stable and reliable power transmission solutions for explosion-proof inverters, UPS systems, and new energy power equipment.
If you are developing projects involving high-voltage inverters, UPS systems, or new energy power equipment, we can provide professional design and manufacturing support for laminated busbars tailored to your specific electrical parameters and structural requirements, helping you enhance equipment reliability and shorten product development cycles.
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