Laminated busbars,also known as composite copper busbars,multi layer busbar,laminated connector,are a multi-layer composite structure connection bar, which is the highway of the power distribution system. Compared with traditional cumbersome and time-consuming wiring busbars, laminated busbars can provide a modern, easy-to-design, fast-installation, and clearly structured power distribution system. High-power modular connection structural components with repeatable electrical performance, low impedance, anti-interference, good reliability, space saving, simple and quick assembly.The laminated busbar is a three-dimensional structure, which can realize the current distribution in the electronic module. Laminated busbars are widely used in rail transit, wind and solar inverters, industrial inverters, large UPS systems or other components that require power distribution.
Laminated busbars are engineered components consisting of layers of fabricated copper separated by thin dielectric materials,laminated into a unified structures.laminated busbar are mainly used for connection between IGBT’s and support capacitor.
A laminated structure consists of layers of insulated copper sheet;each layer distributes current at a different voltage.A layer can also act as ground.and EMI shield or transmit signals.
Technical Parameter of Laminated Busbar:
| Product Name | Laminated Busbar |
| Material | T2 CU,1060AL |
| Surface Treatment | Tin plated,Silver plated,Nickel plated,Gold plated |
| Edge Banding process | Hot Press Edge Banding |
| Rated Current | 0-10KA |
| Work Temperature | -40°C-125°C |
| Heat Up | 0-40K |
| Rated Voltage | 400V-20KV |
| Flammability Rating | UL94 V-0 |
| Partial Discharge | ≤10PC |
| Max.maching dimension | 1600*1000mm |
| — | — |
Advantages of Laminated Busbar:
- Lowest impedance,reducing the power loss;
- Lowest self-inductance and mutual inductance;
- Reduce voltage peak,improve safety and reliability;
- Low inductance to improve IGBT’s swithc speed;
- Structural optimal reliability;
- Easy for modeling design,cost control;
- Heat sink obtain nice performance;
- Overload capacity promoted to 150%;
Advantage Comparison of Traditional Busbar & Laminated Busbar
| Image |  |  |
| Product Name | Traditional Busbar | Laminated Busbar |
| Installability | Repeated installation, error-prone | One-time installation,saves time |
| Cost | Structure not compact,Large Size | Compact design, reduce size |
| Inductance performance | Large stray inductance | Compact laminated structure reduces peak voltage and protects IGBT |
| Capacitance performance | Capacitor design cannot be optimized | The capacitance can be optimized by changing the stack and the material |
| Reliability | Bare copper,Three year life | Copper completely covered,10years life |
Laminated Busbar Applications:
- Semiconductor: IGBT;
- Energy Generation: Solar inverter, Wind energy inverter;
- Electric Automotive: Electric engine,Braking system,Brake energy storage system;
- Charging Station System: Charging gun,Charging column control system,Electric energy storage system;
- Rail Transportation: Traction inverter,Traction converter,Braking system;
- Power Electronic System: Frequency converter,Large converter;
- Heavy Industry System: UHV Transmission system,Large forklift,crane,Elevator control,Heavy industry brake system;
Laminated Busbar 
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Copper Laminated Busbar
