Hiroaki Toyoda

Title: Hiroaki Toyoda: Innovations in Electrified Vehicle Systems

Introduction

Hiroaki Toyoda is an inventor based in Gotemba, Japan, whose work focuses on electrified vehicles and motor-control systems. He is associated with Toyota Jidosha Kabushiki Kaisha and is credited with 4 patents.

Latest Patents

Toyoda’s recent patent work includes an electrified vehicle system designed to detect an open-circuit failure in a switch. The system uses an energy storage device, a traction motor with a three-phase open-end winding, two inverters, a switch between the inverters, and a controller. When the switch is on and the inverters are switching, the controller monitors zero-sequence current and identifies a possible switch failure if the current reaches or exceeds a specified threshold.

Another patent describes a dual-mode inverter system for driving a motor. Its two inverters connect to opposite ends of the motor’s stator coil. In single mode, the motor is driven by the first inverter while the second inverter is disconnected from the battery. The controller selects either an upper or lower short-circuiting configuration for the second inverter and compares the loads on its upper and lower switching devices.

Career Highlights

Toyoda’s listed inventions address inverter operation, fault detection, and control strategies for electrified vehicles. These technologies are relevant to improving the monitoring and operation of vehicle power systems.

Collaborations

Toyoda’s listed coworkers include Kazuma Fujiwara and Akihiro Fujimoto. His work is associated with Toyota Jidosha Kabushiki Kaisha.

Conclusion

Hiroaki Toyoda’s patent portfolio reflects a focus on practical control and fault-detection innovations for electrified vehicle systems.