Inverter Busbar For Rail Traffic
In rail transit vehicles (such as subways, light rails, high-speed trains, and trams), traction inverters and auxiliary converters are responsible for the core tasks of energy conversion and distribution. The operating environment requires the electrical connection system to have characteristics such as strong vibration resistance, wide temperature variation resistance, moisture and dust resistance, and long service life without maintenance. Inverter busbar for rail traffic - a stacked busbar designed specifically for such working conditions - is becoming an engineering standard to replace traditional cables and discrete copper bars.
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Product Introduction
The core positioning of Inverter busbar for rail traffic is a high reliability and low inductance connection solution specifically designed for rail transit inverters. It focuses on the five core requirements of "high-voltage insulation safety, high-frequency peak suppression, vibration and shock resistance, wide temperature range stable operation, and compact space adaptation" in the traction drive system of rail transit, and is specifically designed for rail transit inverters, traction converters, and auxiliary power systems.
Application scenarios
Subway traction inverter
Used for high-voltage and high current connection between IGBT module and DC bus in subway train traction converter. The low inductance design of the Inverter busbar for rail traffic can effectively suppress IGBT turn off overvoltage and protect power devices; The fully enclosed insulation edge and anti vibration structure are suitable for the vibration, dust, and humid environment during subway operation.
Light Rail Auxiliary Power System
Used for high-density electrical interconnection between power modules inside the auxiliary inverter of light rail vehicles. The flattened multi-layer structure of the Laminated busbar for telecom enables compact wiring within a limited cabinet space, optimizes heat dissipation paths, reduces temperature rise, and enhances overall power density.
Optimizes space, cooling, and power density.
Tram braking energy recovery system
Used for connecting supercapacitors or braking resistors to DC busbars. The low resistance (≤ 0.00001 Ω) and low inductance characteristics of the Motor drive laminated bus bar for power electronics are suitable for high-frequency charging and discharging conditions, ensuring energy recovery efficiency. At the same time, the flexible structure can absorb vibration and thermal expansion during vehicle operation.
Anti vibration structure design
High strength overall compression
The Laminated copper busbar is formed as a whole structure through adhesive hot pressing between each layer, with no possibility of relative motion, ensuring that there will be no friction, wear or electrical contact degradation between the layers under long-term vibration conditions of the train.
01
Fully enclosed insulated edge
The Laminated busbar for Mersen effectively prevents creeping electrical breakdown and insulation performance degradation by blocking dust and moisture from entering the interlayer, especially suitable for high humidity underground lines or tunnel dust environments.
02
Elastic compensation structure
The optional flexible section design in the Laminated copper bar absorbs installation tolerances and thermal expansion differences, reducing additional stress on connection points caused by vehicle deformation or temperature changes.
03
Anti loosening terminal design
Combined with anti loosening washers and torque control, it can resist vibration loosening and ensure that the bolt connection point maintains stable contact pressure throughout the entire life cycle of the train, effectively preventing arc-induced contact degradation.
04
surface treatment
Nickel plating treatment
Busbar for electric locomotive has excellent corrosion resistance, high mechanical strength, and low contact resistance, suitable for harsh working conditions such as rail transit traction systems, effectively resisting connection degradation in salt spray, moisture, and vibration environments.
Silver plating treatment
Busbar for power electronics has the highest conductivity and excellent corrosion resistance, suitable for high-frequency circuits such as signal power systems, ensuring stable signal transmission, reducing contact losses, and improving system response performance.
Tin plating treatment
With excellent welding performance and anti-oxidation protection, the Inverter busbar for rail traffic is used in scenarios such as auxiliary power systems that require frequent connection or welding assembly, balancing conductivity and process convenience, with significant cost advantages.
Ultrasonic cleaning
Before surface treatment, ultrasonic cleaning is used to thoroughly remove oil stains, oxide layers, and impurities on the surface of the copper substrate, ensuring a tight bond between the surface treatment layer and the substrate, avoiding bubbles and delamination.
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