Laurent Cardoletti

Title: Innovations by Laurent Cardoletti

Introduction

Laurent Cardoletti is a notable inventor based in Montreux, Switzerland. He has made significant contributions to the field of motor control technology, particularly in brushless DC motors. With a total of 2 patents to his name, Cardoletti's work focuses on enhancing the efficiency and accuracy of motor speed control.

Latest Patents

Cardoletti's latest patents include innovative methods for controlling brushless DC motors. The first patent, titled "Closed loop control of a brushless DC motor at nominal speed," describes a control apparatus that regulates motor speed without conventional rotor position devices like Hall sensors. This system determines the current speed using back EMF zero-crossing measured over complete rotor revolutions, effectively mitigating motor dissymmetry errors. The control system compares the current speed to a desired speed and adjusts the total motor current accordingly, ensuring highly accurate speed control.

The second patent, "Closed-loop control of a brushless DC motor from standstill to medium," introduces a method for detecting motor position with high accuracy. This method allows for reliable starting in the correct direction by injecting short current pulses into different motor phases. By establishing a table of results that defines the rotor's position relative to the motor phases, the system can apply the appropriate polarity currents to start the motor smoothly and accelerate it to medium speed without back oscillation.

Career Highlights

Laurent Cardoletti is currently employed at Seagate Technology Incorporated, where he continues to develop innovative solutions in motor control technology. His expertise in this area has positioned him as a valuable asset to the company.

Collaborations

Cardoletti collaborates with Alain M Cassat, contributing to advancements in their field through shared knowledge and expertise.

Conclusion

Laurent Cardoletti's contributions to brushless DC motor technology demonstrate his commitment to innovation and efficiency. His patents reflect a deep understanding of motor control systems, paving the way for future advancements in the industry.