Michael Thomas Perry

Title: Michael Thomas Perry: Innovator in Brushless DC Motor Control

Introduction

Michael Thomas Perry is a notable inventor based in Auckland, New Zealand. He is recognized for his contributions to the field of motor control technology, particularly in the development of brushless DC motors. His innovative approach has led to advancements that enhance the efficiency and performance of fractional horsepower applications.

Latest Patents

Perry holds a patent for a Brushless DC motor control system. This electronically commutated motor is designed primarily for applications where one motor winding is unpowered at any given moment. The system utilizes back EMF zero-crossings to initiate winding commutations. The duration of the pulse produced in the unpowered winding, due to energy dissipation by free-wheel diodes, provides a measure of motor current. This innovation allows for simplified current limiting circuits and enhances control based on motor torque. Additionally, Perry's method maximizes useful power output by reducing the phase angle between motor current and back EMF, achieved by delaying the commutation of motor windings.

Career Highlights

Michael Thomas Perry is associated with Fisher & Paykel Limited, where he has made significant contributions to motor control technologies. His work has been instrumental in advancing the capabilities of brushless DC motors, making them more efficient and reliable for various applications.

Collaborations

Perry has collaborated with notable colleagues, including John H Boyd, Jr and Gerald David Duncan. These partnerships have fostered innovation and development in the field of motor control.

Conclusion

Michael Thomas Perry's contributions to brushless DC motor control exemplify his commitment to innovation in technology. His patent and work at Fisher & Paykel Limited highlight his role as a key figure in advancing motor efficiency and performance.