This inventor holds 9 USPTO granted patents and 1 published patent application, plus 1 CIPO patent and 6 EPO patents. Top assignees: Abb Schweiz Ag, Asea Brown Boveri Ag, Abb Technology Ag. Active years: 1998-2022.
Location History:
- Zürich, CH (2001 - 2020)
- Zurich, CH (1998 - 2022)
Company Filing History:
4 out of 2,898 
3 out of 410 
1 out of 862 
Years Active: 1998-2022
Title: Christian Stulz: Innovator in Synchronous and Induction Motor Technologies
Introduction
Christian Stulz is a notable inventor based in Zurich, Switzerland. He has made significant contributions to the field of electrical engineering, particularly in the development of methods for starting synchronous and induction motors. With a total of 9 patents to his name, Stulz has demonstrated a commitment to innovation and technological advancement.
Latest Patents
One of Stulz's latest patents is a method for starting a synchronous motor. This method involves a rotor that creates a first magnetic field and a stator with windings connected to an electrical energy converter. The converter transforms a supply voltage into a stator voltage, which is then applied to the stator windings to create a rotating second magnetic field that interacts with the first magnetic field. The process includes applying reference stator voltages determined from a reference current vector and a reference rotor speed, measuring stator currents, and calculating an estimated rotor speed and position. Additionally, it involves calculating a speed error and modifying the reference current vector accordingly.
Another significant patent by Stulz is a method for starting an induction machine without residual flux. This method includes scanning the state of the induction machine with different stator frequencies by controlling the supply voltage. It determines whether a slip value, which is the difference between rotor frequency and stator frequency, is within a slip interval. Once confirmed, the slip value is regulated towards zero, and the machine is magnetized to the required level.
Career Highlights
Throughout his career, Christian Stulz has worked with prominent companies such as ABB Schweiz AG and Asea Brown Boveri AG. His experience in these organizations has allowed him to refine his skills and contribute to various innovative projects in the field of electrical engineering.
Collaborations
Stulz has collaborated with notable professionals in his field, including Andrey Kalygin and Christoph Stemmler. These collaborations have further enriched his work and contributed to the development of advanced technologies in motor systems.
Conclusion
Christian Stulz is a distinguished inventor whose work in synchronous and induction motor technologies has made a lasting impact on the industry. His innovative methods and collaborations highlight his dedication to advancing electrical engineering.