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Address:Building 4, HEDY Kechuang Park, No. 63, Punan Road, Huangpu District, Guangzhou,China.
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Telephone:+86-20-84206763
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Intelligent Control and Precision Sensing, Application and Practice of Electronic Technology in Railway Transportation
AEP's main business in rail transportation involves the provision of modular power supply products for railroad communication systems, subway broadcasting systems, train speed regulators, train smoke and fire alarm systems, and railroad monitoring and diagnostic equipment. Its products are mainly applied in the low voltage input, power 1-3W micropower modular power supply market, as well as medium and high power products, including a full range of modular power supply products used in rail transit related equipment. These products meet the high standards and strict requirements of rail transit, such as operating ambient temperature, ripple, etc., to ensure the stable operation of rail transit systems. |
Typical use cases for rail transportation
1) Railway communication system: Aipu's modular power supply products play an important role in the railroad communication system, providing a stable and reliable power supply.
2) subway broadcasting system: subway broadcasting system on the stability and reliability of the power supply requirements are very high, Aipu electronic products to meet these needs.
3) train governor: train governor is a crucial part of train operation, Aipu Electronics provides power modules to ensure the accurate operation of the governor.
4) train smoke and fire alarm system: in the train smoke and fire alarm system, Aipu Electronics power modules are responsible for providing stable power for the alarm system.
5) Railway monitoring and diagnostic equipment: Railway monitoring and diagnostic equipment requires a precise and stable power supply to ensure the accuracy of monitoring data.
Typical Aipo products, such as FD50-XXSXXB3C2(-T)(-TS) series, have the following features:
◆ Ultra-wide range input: (4:1) Output power 50W ◆ Package: 11.8mm ◆ Conversion efficiency up to 90%. ◆ Low standby power consumption down to 0.2W ◆Ultra-fast startup: startup time as low as 20ms. ◆Long-term short-circuit protection, automatic recovery Input under-voltage, output over-voltage, short-circuit and over-current protection. ◆ Switching frequency 250KHz Isolation voltage 1500VDC ◆ Operating temperature range: -40°C~+85°C ◆ Good electromagnetic compatibility EMI characteristics International standard pinout |
Another product, FD12-110SXXA3N4 series, is designed for railroad transportation with the following features:
◆ Wide input voltage range ( 4:1), Output Power 12W ◆ Transfer Efficiency up to 89% ◆ Stand-by Power Consumption as low as 0.05W ◆ Output super-fast start up ◆ Continuous Short Circuit protection, Self-recovery ◆ Input under voltage, output over voltage, short circuit, over current protection ◆ Switching Frequency 300KHz ◆ Isolation Voltage: 2100VAC ◆ Operating Temperature: -40°C~+85°C ◆ Good EMI performance ◆ International standard pin-out |
Technical Application Introduction
DC-DC Modular Power Supply (Railway Transportation) Application Guide
Aipu Electronics, as a high-tech enterprise focusing on the research, development, production and sales of modular power supplies, has provided many high-quality DC-DC modular power supply products for rail transportation over the years. The purpose of this guide is to provide rail transit customers with application guidance on Aipu DC-DC modular power supply, to help customers better select, use and maintain our products.
Ⅰ.Product Features
● High stability: Aipu DC-DC modular power supply adopts advanced technology and high-quality components to ensure stable operation in the complex environment of rail transportation.
● High reliability: the products have been strictly tested to meet the high reliability requirements of rail transportation for power supply.
● High conversion efficiency: reduce energy consumption and improve overall system performance.
● Small size: save installation space, easy to integrate with rail transportation equipment.
Multiple protection functions: short-circuit, over-voltage, over-current and other protection to ensure the safety and reliability of the power supply.
● Compliance with rail transportation standards: the product complies with CE, ROHS, UL and other international certifications, and meets the requirements of electromagnetic compatibility and environmental adaptability of rail transportation.
Ⅱ.Product model and application
1 FD20-XXSXXB2C5 Series
Application areas: railroad monitoring and diagnostic equipment, train governor, etc.
Features: 20W power, wide range input (9-36, 18-75Vdc), output voltage 3.3, 5, 9, 12, 15, 24V, conversion efficiency up to 90%, low standby power consumption.
2 BK Series
Product Model: BK150-800SXXGB1D6, BK40-650SXXW2N4, etc.
Application areas: railroad signaling, monitoring systems, etc.
Characteristics: Power 150W, 40W, input voltage range 200V-1500V, output voltage 12V, 24V, 28V, etc., isolation voltage up to 4000V.
3 ZCD Series
Model No.: ZCD150-110S28A, ZCD200-110S24, ZCD150-110S110, ZCD150-110S48, etc.
Applications: railroad communication, signaling system, subway broadcasting system, etc.
Features: power range 150W-200W, wide input voltage range, diverse output voltages, isolation voltage up to 3000V.
Ⅲ.selection guide
1 ultra-wide input voltage range: rail transit power supply needs to be able to adapt to a variety of rated supply voltage of the on-board battery, so it requires an ultra-wide input voltage range. For example, Aipu electronic rail transportation power supply has 4:1 ultra-wide input voltage range, can be compatible with a variety of power supply applications.
2 Enhanced insulation: Due to safety requirements, rail transit power supplies need to meet strict isolation voltage withstand requirements. For example, Aipu electronic rail transit power supply adopts 5000/3000VAC reinforced insulation technology to protect the system safety.
3 Vibration requirements: Electronic equipment needs to withstand vibration in rail vehicles, so power supplies need to meet the requirements of Class 1, Level B vibration of the vehicle body. Aipu's rail transit power supplies are filled with insulating epoxy resin to block the mechanical stresses caused by shock and vibration.
4 low inrush current design: taking into account the EMC design and power-down hold time, the power supply system needs to have a low inrush current characteristics to prevent triggering a circuit breaker or fuse blowing at the moment of power-up.
5 electrical / mechanical double anti-reverse function: in order to prevent equipment damage, the power supply needs to have electrical and mechanical double anti-reverse function, in order to protect the equipment from the impact of power polarity reversal.
6 wide operating temperature range: power supply needs to adapt to the harsh operating environment, including extreme temperature changes. For example, Aipu electronic rail transit power supply can meet the ambient temperature requirements from -40 ℃ to 85 ℃.
7 excellent electromagnetic compatibility (EMC) performance: the power supply needs to comply with the requirements of its electromagnetic environment to operate, and does not produce intolerable electromagnetic interference to any equipment in its environment. For example, Aipu Electronics' FD12-XXSXXB2C5 series are rated CLASS B for each EMI item and Perf. Criteria B for each EMS item.
In the PIS system, common equipment power solutions include LCD dynamic information display systems, whose power solutions need to be able to stabilize the power supply and regulate the backlight.
Ⅳ.After-sales service
Aipu Electronics provides a 5-year warranty period to provide customers with a full range of technical support and after-sales service. If you have any questions, please feel free to contact us, we will be happy to answer your questions.
V. Conclusion
Aipu Electronics is committed to providing high-quality, high-performance DC-DC modular power supply products for rail transit to help China's rail transit development. Thank you for your trust and support of our products, we will continue to work hard to provide you with better service.
EMC (Electromagnetic Compatibility) Design of Isolated Power Supplies in Railway Transportation Equipment
EMC (Electromagnetic Compatibility) design of isolated power supply in rail transit equipment is a complex issue involving many fields such as power electronics, electromagnetism and rail transit engineering. In order to better answer this question, we need to think about the following aspects:
1 the role of isolated power supply: first of all, we need to clarify the role of isolated power supply in rail transportation equipment. Isolated power supply is mainly used to provide power supply at the same time, isolate the electromagnetic interference between different circuits to ensure the stable operation of the equipment.
2 the characteristics of rail transportation equipment: rail transportation equipment is usually operating in a complex environment, such as high electromagnetic interference, vibration, temperature changes, etc., these factors will have an impact on the EMC performance of the equipment.
3 Principles of EMC design: In rail transportation equipment, EMC design needs to follow some basic principles, such as suppressing the source of interference, cutting off the interference path, and improving the anti-interference ability of sensitive equipment.
4 specific EMC design measures: for the isolated power supply, you can take some specific EMC design measures, such as the use of filters, shielding, grounding, isolation transformers and so on.
5 actual cases: Finally, we can analyze some actual rail transit equipment isolated power supply EMC design cases to further understand and master the knowledge and experience in this area.
According to the above isolated power supply in the rail transportation equipment in the EMC (electromagnetic compatibility) design aspects of the problem, Aipu electronic design strategy:
1 EMC testing and performance assurance: Aipu Electronics' isolated power supply module for EMI (electromagnetic interference) and EMS (electromagnetic immunity) testing to ensure that the electromagnetic energy it generates does not interfere with other equipment, and is not subject to electromagnetic energy interference from other equipment.
2 Circuit design optimization: In circuit design, Aipu Electronics follows the principle of protection before filtering, selects continuous conduction mode (CCM) topologies such as Boost, full bridge, push-pull, etc., and adopts RC and RCD absorption circuits for circuit protection, which are placed close to the switching tubes to reduce the spike voltage. In addition, filter circuits such as π-type filter and full-wave rectifier circuits are used.
3 PCB design: In PCB design, Aipu Electronics focuses on large area paving, reducing the division of the ground plane, reducing the loop area, reducing the length of wiring, thus reducing the inductance at the dynamic node, avoiding the generation of a strong electromagnetic field.
4 component selection: in the selection of components, Aipu focus on high-frequency transformers, field effect tubes, common mode inductors and other choices to ensure low loss, good shielding effect and compliance with standard parameters. For example, high-frequency transformers need to ensure low DC loss, low AC loss and small leakage inductance.
5 EMC simulation and design optimization: Aipu Electronics also attaches importance to EMC simulation in the early design stage, in order to cope with product complexity and design cycle shortening challenges. They use EMC simulation based on conceptual analysis to accurately model and predict electromagnetic compatibility issues through 3D solutions.