Walter Johann Kolar

Title: Walter Johann Kolar: Innovator in Motor Drive Systems

Introduction

Walter Johann Kolar is a notable inventor based in Zurich, Switzerland. He has made significant contributions to the field of motor drive systems, showcasing his expertise through innovative designs and patents. His work is particularly recognized for its application in enhancing the efficiency of three-phase motors.

Latest Patents

Walter Johann Kolar holds a patent for a motor drive system. This system includes a first inverter connected to one end of an open-end winding of a three-phase motor. The input voltage from a single-phase AC power source is rectified into a rectified voltage and input to the first inverter. Additionally, a second inverter is connected to another end of the open-end winding and includes a DC link capacitor. The control unit manages the first inverter to ensure that the output voltage supplied to the three-phase motor is in phase with the motor current. It also controls the second inverter to supply reactive power to the motor, making the output voltage orthogonal to the motor current. This innovative approach aims to make the instantaneous power supplied from the DC link capacitor to the motor zero, while synchronizing the output voltage with the single-phase AC power source.

Career Highlights

Walter Johann Kolar is associated with Nabtesco Corporation, where he continues to develop and refine his innovative motor drive systems. His work has garnered attention for its potential to improve motor efficiency and performance in various applications.

Collaborations

Walter has collaborated with esteemed colleagues such as Yasuo Ono and Kazuhito Nakamura. Their combined expertise has contributed to advancements in motor technology and innovation.

Conclusion

Walter Johann Kolar is a distinguished inventor whose work in motor drive systems exemplifies innovation in engineering. His patent reflects a commitment to enhancing motor efficiency, making a significant impact in the field.