Chinh Dac Nguyen

Title: Chinh Dac Nguyen: Innovator in Motor Control Technologies

Introduction

Chinh Dac Nguyen is a notable inventor based in Sunnyvale, CA, who has made significant contributions to the field of motor control technologies. With a total of 3 patents to his name, Nguyen has developed innovative solutions that enhance the performance and efficiency of motor systems.

Latest Patents

One of his latest patents is titled "Power down brake latch circuit for a brushless DC motor." This invention discloses a power down brake latch circuit designed for dynamically braking a spindle motor in a disk drive system. The circuit includes a reservoir capacitor, a smoothing capacitor, a timing circuit, and a logic circuit. The timing circuit features a voltage divider and a bandgap comparator, while the smoothing capacitor absorbs back EMF voltage from the spindle motor as it rotates after losing power. The logic circuit effectively brakes the spindle motor in response to power loss and the generation of a specific signal.

Another significant patent is the "Apparatus and method for detecting motor position in PWM operation." This invention involves a pulse width modulated (PWM) motor drive that monitors back EMF in the floating phase of a polyphase motor. It allows for the reading of zero crossings of the back EMF without interference from PWM switching. The system measures the interval between two zero crossings and stops PWM switching near the next expected zero crossing, ensuring accurate motor position detection.

Career Highlights

Chinh Dac Nguyen has worked with prominent companies in the technology sector, including SGS-Thomson Microelectronics Limited and STMicroelectronics GmbH. His experience in these organizations has contributed to his expertise in motor control and electronic systems.

Collaborations

Throughout his career, Nguyen has collaborated with talented professionals, including Eugene C. Lee and Paolo Menegoli. These partnerships have fostered innovation and the development of advanced technologies in the field.

Conclusion

Chinh Dac Nguyen is a distinguished inventor whose work in motor control technologies has led to several impactful patents. His contributions continue to influence the industry and enhance the functionality of motor systems.