Key specifications of DC/DC Converts in Railway Application_CTC Power

It uses converter in different parts in the train cabin, like Surveillance System, On-board computer, and Broadcasting System.

Next, we will show some key spec which we need to pay attention to railway application.

These three special requirements are from EN50155, they are Operating temperature, Variations and Interruptions of voltage supply.

First one is Operating temperature, the levels for electronic equipment are listed in the figure.

As figure shows, different cabins are with different temperature requirements.

And most of the CTC's railway converter can meet the OT4 to OT6 requirement.

The second one is Variations of voltage supply. There is a special definition for input voltage variations in EN50155.

Normally it needs wide input voltage range converter to meet the requirement, and it becomes mainstream in railway application.

And CTC already has had the 12 to 1 input range converter for many years.

The third one is, Interruptions of voltage supply.

During the transition of different power source, the electric power on the train become unstable in a short time. Such as a sudden voltage drop or a short-term power off. During this situation, the converter must remain operational.

So, it is very important to have a converter with simple method to pass the voltage interruption.

And CTC has the solution for it.

This figure is a block diagram for railway PoE device. The converter can provide isolated power to internal device. Also provide power through RJ45 connector to the end device. With wide input range converter, the device can operate in different input range, like 24, 48, 72 and 110V.

Using dc/dc converters will bring benefits to the system.

Like expanded the input voltage range, minimize total layout space and optimize thermal and EMS performance.

Next episode will show the benefit for Vbus.

Thanks for your attention, see you next time.

頻譜電子為專業的高階電源模組(交流轉直流電源轉換器, 直流轉直流電源轉換器)提供設計製造及技術服務，服務範圍遍及全球。我們的核心能力為領先的技術、具競爭力的成本效益、極具彈性的交貨時間, 全球性的技術服務以及高品質製造(台灣製造)。

頻譜電子是業界中唯一擁有ISO9001, IATF16949, ISO22163(IRIS)以及ESD20.20。我們可以從專案的最初開始，完整地確認產品、流程及服務都是符合品質管理系統的要求。從設計、製造到技術服務等每個細節都在最高標準的要求下進行。