Gerald David Duncan

Title: Gerald David Duncan: A Pioneer in Motor Technology

Introduction

Gerald David Duncan is a notable inventor based in Auckland, New Zealand, known for his significant contributions to motor technology. With a remarkable portfolio of 26 patents, Duncan's work has played a pivotal role in the development of innovative motor designs suited for various applications, particularly in the home appliance sector.

Latest Patents

Among his latest patents, one highlights a motor designed specifically for direct drive laundry machines. This motor features a stator core with an annular ring, which has an inner diameter ranging from 120 mm to 250 mm, and a radial width between 5 mm and 15 mm. The motor is equipped with 24 or 27 stator poles that extend outward, each associated with three phase windings. Noteworthy is the rotor, which contains inwardly facing permanent magnet poles, maintaining a ratio of rotor to stator poles of 4:3.

Additionally, Duncan has developed a BLDC (Brushless Direct Current) motor aimed at driving cross-flow fans in air-conditioning systems. This motor integrates an external rotor and an internal salient pole stator with insulated pole teeth and conductor coils. The design further includes a single bearing support within the stator's inner diameter, while an electronic PCBA for motor control may be affixed to the stator and encapsulated in thermoset resin. The rotor comprises permanent magnet components and a rotor frame designed to ensure torsional compliance between the rotor magnets and the fan, facilitating adaptation to angular misalignment between their rotational axes.

Career Highlights

Gerald Duncan has held key positions at renowned companies such as Fisher & Paykel Limited and Fisher & Paykel Appliances Limited. His work there has significantly influenced the appliance industry, particularly through innovations in motor technology that enhance efficiency and performance.

Collaborations

Throughout his career, Duncan has collaborated with talented individuals such as Frank W Shacklock and Gregory Paul Hill. These partnerships have allowed for shared knowledge and experience, further driving the advancement of motor technologies and enhancing the innovation ecosystem.

Conclusion

Gerald David Duncan's innovative spirit and technical expertise have firmly established him as a leading figure in the field of motor invention. With 26 patents to his name, his work continues to inspire future innovations in home appliances and beyond. As the industry evolves, Duncan's contributions stand as a testament to the impact of creativity and collaboration in technological advancement.