Automation Engineering

  • Reading time:22 mins read

Automation engineering

Intelligent Mobility

This automation engineering company is a German conglomerate founded in 1847 in Berlin. It is involved in various sectors such as industrial automation and digitalization, building infrastructure, and medical technology. The company focuses on developing intelligent infrastructure, mobility solutions, as well as automation and digitalization in different areas. Siemens has around 125 locations in Germany and is present in over 190 countries. 

About

Industry: Industrial Supply / Automation Technology 

Company Size: 300,000 employees, 85 billion euros in revenue 

Country: Germany

“Netzteile sind unverzichtbar für den Betrieb elektronischer Geräte, da sie eine stabile Stromversorgung liefern, welche den Anforderungen des jeweiligen Geräts entspricht. Ohne Netzteile könnten elektronische Geräte nicht betrieben werden, da sie auf eine stabile und präzise Stromversorgung angewiesen sind.”

Vorname Nachname

Position

“Netzteile sind unverzichtbar für den Betrieb elektronischer Geräte, da sie eine stabile Stromversorgung liefern, welche den Anforderungen des jeweiligen Geräts entspricht. Ohne Netzteile könnten elektronische Geräte nicht betrieben werden, da sie auf eine stabile und präzise Stromversorgung angewiesen sind.”

Vorname Nachname

Position

Projects

Intelligent Mobility

Requirements

Case study

The biggest challenge in this project was the extremely wide input voltage range in which the device had to operate. As a concept, a classic flyback converter was chosen, with a preceding two-stage PFC solution to regulate the voltage across the intermediate circuit capacitors to approximately 400V.

The customer requested a universal power supply that ensures coverage of all relevant power grids in the industry. For this reason, we opted for a power supply with an 18V-264VDC and 88-264VAC input.

The power supply is intended to deliver 60W at 24V and comply with NEC Class 2, which means that it should also provide <= 100W in case of a simple fault. The output voltage characteristic should follow U-I operation mode at >= 10V and hiccup at <10V. The power supply has been specifically optimized for DIN rail mounting.

Requirements

Case study

To meet the customer’s requirements, a duplicated flyback topology without PFC was used. The customer requested a power supply with two galvanically isolated outputs, each capable of delivering 60 watts. The two outputs should be able to be connected in series or parallel to increase the output voltage or current, respectively. Each output should comply with NEC Class 2 and deliver less than 100 watts in case of a simple fault. The output voltage characteristic should follow >= 10V DC in U-I mode (<10V DC Hiccup). Another special feature is that the power supply has a wide-range output, and the output voltage can be adjusted between 12 and 24VDC using a potentiometer.

The certification of the power supply was intended to comply with the applicable standards at that time: