Masahiro Doi

Title: Masahiro Doi: Innovator in Electronic Control Devices

Introduction

Masahiro Doi is a prominent inventor based in Hitachinaka, Japan. He has made significant contributions to the field of electronic control devices, holding a total of 15 patents. His work focuses on improving the reliability and safety of power conversion systems.

Latest Patents

Doi's latest patents include an electronic control device for power conversion and a power supply integrated circuit (IC). The electronic control device features an integrated safety function that enhances reliability. It consists of a power module that converts direct current (DC) power into alternating current (AC) power for motor supply. Additionally, it includes a gate driver for controlling the power module, a microcontroller for managing the gate driver, and a power supply IC that provides power to the gate driver and microcontroller. A discharge circuit is also included to manage high voltage supplied to the power module, along with a sensor for monitoring. The power supply IC is equipped with a microcomputer abnormality detection circuit that identifies issues with the microcontroller and a safety processing circuit that determines the need for safety measures based on sensor outputs. This circuit can stop the motor or discharge high voltage when necessary.

Another notable patent is an electronic control device that detects the fixing of a power supply relay, even when the relay cannot be turned off. This device includes a relay drive circuit that manages the power supply relay based on power supply information, an electronic circuit operating at a first power supply voltage, and a monitoring unit that tracks the first power supply voltage when the power supply is off.

Career Highlights

Masahiro Doi has worked with several reputable companies, including Hitachi Astemo Ltd. and Hitachi Automotive Systems, Ltd. His experience in these organizations has allowed him to develop innovative solutions in electronic control systems.

Collaborations

Doi has collaborated with notable colleagues such as Takeo Yamashita and Yuri Ohara. Their teamwork has contributed to advancements in the field of electronic control devices.

Conclusion

Masahiro Doi's contributions to electronic control devices demonstrate his commitment to innovation and safety in power conversion technology. His patents reflect a deep understanding of the complexities involved in electronic systems, making him a significant figure in the industry.