James Christopher Smart

Title: James Christopher Smart: Innovator in Electric Motor Technology

Introduction

James Christopher Smart is a notable inventor based in Horsforth, GB. He has made significant contributions to the field of electric motor technology, holding a total of 3 patents. His work focuses on enhancing the efficiency and functionality of electric motors, particularly in the areas of rotor position sensing and power factor correction.

Latest Patents

One of his latest patents is related to the starting of single-phase motors. This invention features a rotor position transducer for electronically commutated electric motors. It includes a vane that rotates with the rotor and a pair of sensors. One sensor outputs signals coinciding with zero torque positions, while the other sensor produces signals slightly in advance. The overlapping portions of these signals indicate regions of varying torque levels. Additionally, the second sensor's output can be utilized for high-speed, single-pulse control of the motor.

Another significant patent by Smart is a digital power factor correction circuit. This circuit comprises a digital comparator that compares the actual DC bus voltage of an electric circuit with a desired DC bus voltage. It generates a digital attenuation signal in the form of a pulse width modulated signal, which is used to reduce the voltage from a time-varying source. The attenuated source voltage serves as the current demand signal for a current controller that regulates the current drawn from the line.

Career Highlights

Throughout his career, James Christopher Smart has worked with several prominent companies, including Switched Reluctance Drives Limited and Emerson Electric Company. His experience in these organizations has allowed him to develop and refine his innovative ideas in electric motor technology.

Collaborations

Smart has collaborated with notable individuals in his field, including David Mark Sugden and Phillip G Langhorst. These partnerships have contributed to the advancement of his inventions and the overall progress in electric motor technology.

Conclusion

James Christopher Smart is a distinguished inventor whose work in electric motor technology has led to several important patents. His innovations continue to influence the industry and improve the efficiency of electric motors.