Donald J Bergstrom

Title: Innovations of Donald J Bergstrom in Synchronous Motor Control

Introduction

Donald J Bergstrom is an accomplished inventor based in San Diego, CA. He has made significant contributions to the field of motor control technology. His innovative approach focuses on enhancing the precision and efficiency of synchronous motors.

Latest Patents

Bergstrom holds a patent for a process and apparatus for characterizing and controlling a synchronous motor. This invention allows for precise velocity motion in microstep mode. The motor's velocity is directly proportional to the frequency of the microstep excitation pulses. These pulses control the rate of change of sine and cosine motor currents. The motor operates at a normalized frequency using a digital memory that regulates the microstep clock pulse rate. Errors in velocity and position are determined at discrete locations, and frequency correction terms are inserted into the memory before the corrections take effect. The apparatus includes means to generate sine and cosine signals that remain in synchronism, ensuring effective control of the motor's quadrature windings. Additionally, the preprogrammed memory corrects for motor motion errors and optical distortions in lens systems. The invention also features a feedback arrangement to address resistance variations and temperature changes.

Career Highlights

Bergstrom has worked with Anacomp, Inc., where he has applied his expertise in motor control technology. His innovative solutions have contributed to advancements in the field, particularly in the area of synchronous motors.

Collaborations

Bergstrom has collaborated with Allan J Wolfer, further enhancing the development of motor control technologies.

Conclusion

Donald J Bergstrom's contributions to synchronous motor control demonstrate his commitment to innovation and precision in engineering. His patent reflects a significant advancement in the field, showcasing the potential for improved motor performance.