Hisanori Nagase

Title: Hisanori Nagase: Innovator in PWM Drive Technology

Introduction

Hisanori Nagase is a prominent inventor based in Hirakata, Japan, known for his significant contributions to the field of electrical engineering. With a total of eight patents to his name, Nagase has made remarkable advancements in PWM drive technology and brushless motor systems. His innovative work has had a lasting impact on various industries.

Latest Patents

Nagase's latest patents include a PWM drive apparatus and a method for correcting output offset. This invention features a first voltage-to-current converter that transforms a difference voltage between a command voltage and a reference voltage into a current. Additionally, a second voltage-to-current converter converts a difference voltage between the positive and negative output terminals of a PWM drive apparatus into a current. A low-pass filter is connected to the output terminals of both converters, while an amplifier enhances the difference voltage between the connection point and a reference voltage. The PWM modulator then modulates the output voltage of the amplifier, allowing the drive section to effectively drive a load based on the PWM modulator's output signal.

Another notable patent is related to a brushless motor and disk drive apparatus. This invention includes first and second power transistors that create current paths to three-phase windings, enabling the rotation of a rotor. A position detecting part generates a position signal in response to the rotor's rotation. The activation operation block controls the active operation of the power transistors based on the position signal. This innovative design allows for stable rotor rotation using a single position signal from one position sensor, significantly reducing the complexity of the system.

Career Highlights

Throughout his career, Hisanori Nagase has worked with esteemed companies such as Matsushita Electric Industrial Co., Ltd. and Panasonic Corporation. His experience in these organizations has contributed to his expertise in developing cutting-edge technologies in the field of electrical engineering.

Collaborations

Nagase has collaborated with notable coworkers, including Masaki Tagome and Makoto Gotou. Their combined efforts have led to advancements in various projects, further enhancing the impact of their work in the industry.

Conclusion

Hisanori Nagase's innovative contributions to PWM drive technology and brushless motors have established him as a key figure in electrical engineering. His patents reflect a commitment to advancing technology and improving system efficiency. His work continues to influence the industry and inspire future innovations