3KW Series Onboard Charger

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Overview  
This standalone power supply features an ultra-compact design, powerful functionality, and superior performance. It offers constant current, constant voltage, and stepless voltage/current adjustment capabilities. Equipped with multiple protection mechanisms such as over-temperature derating, over-current, and short-circuit protection, it also includes monitoring and self-diagnostic functions for input/output status and various parameters.  

Primarily designed for electric buses, urban trolleybuses, trams, subways, and light rail systems, this converter serves as a high-performance DC power supply. It is characterized by high reliability, exceptional efficiency, compact size, and lightweight construction.  

Key Specifications:  
– Input Voltage Range:400–750V DC  
– Output: Single-channel 27.5V DC  
– Integrated Microcontroller: Communicates with monitoring units; internal parameters can be configured or adjusted via CAN interface by the upper-level monitoring system.  

Product Features:  
1. Compact and Lightweight: Saves significant space for users.  
2. Enhanced Design and Reliability: Rigorous component selection and robust mechanical design ensure high reliability and durability.  
3. Flexible Cooling Options: Supports multiple cooling methods, suitable for various applications.  
4. Wide Operating Temperature Range: Functions seamlessly from -40℃ to +85℃ with intelligent temperature derating and over-temperature protection.  
5. High Efficiency: Utilizes soft-switching control technology, achieving a system efficiency of ≥ 96%.  
6. Comprehensive Protection and Alarms: Includes advanced fault detection and protection mechanisms.  
7. Online Upgrades and Diagnostics: Supports real-time program updates and online self-diagnostic functions, facilitating system maintenance and debugging.  

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