Ulrich Baumgaertl

Title: Ulrich Baumgaertl: Innovator in Electrical Engineering

Introduction

Ulrich Baumgaertl is a notable inventor based in Berlin, Germany. He has made significant contributions to the field of electrical engineering, particularly in the development of methods and circuits for measuring current. With a total of 3 patents to his name, Baumgaertl's work has had a considerable impact on the industry.

Latest Patents

One of Baumgaertl's latest patents is a method for reproducing direct currents and a direct current transformer designed to implement this method. This innovative circuit features a primary coil on a magnetic circuit core with an air gap, which can be switched into a line carrying measurement current. Additionally, it includes a secondary compensation coil with a higher winding count, connected to the output of a controllable compensation current source. The output of a Hall element in the air gap is linked to the control input of the compensation source. This design allows for the measurement of both alternating and direct currents at a low cost, effectively compensating for any drift during measurement.

Another significant patent by Baumgaertl is a method and circuit for measuring current, which is particularly useful in electrical engineering for accurately triggering electronic tripping devices in circuit breakers. This method samples only the fundamental wave of the current between precisely determined zero crossings at a low sampling rate. The root mean square is then calculated based on the measured phase angle and amplitude, with the exact phase angle determined using a conventional phase-locked loop (PLL) circuit.

Career Highlights

Baumgaertl is currently employed at Siemens Aktiengesellschaft, a leading global technology company. His work at Siemens has allowed him to further develop his innovative ideas and contribute to advancements in electrical engineering.

Collaborations

Throughout his career, Baumgaertl has collaborated with notable colleagues, including Holger Hochgraef and Wolfgang Röhl. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Ulrich Baumgaertl is a distinguished inventor whose contributions to electrical engineering have paved the way for advancements in current measurement technologies. His innovative patents and collaborations reflect his commitment to excellence in the field.