Yuya Fujishima

Title: Yuya Fujishima: Inventor in Electric Motor Control

Introduction

Yuya Fujishima is an inventor based in Kariya, Japan. His work includes control technologies for electric motors and rotating machines. He is associated with Denso Corporation and is credited with 3 patents.

Latest Patents

Fujishima’s listed patents address precise current measurement and control in electric motor systems.

- Control Device for Alternating-Current Electric Motor. This invention concerns an inverter that supplies alternating-current power to an electric motor through PWM-controlled switching elements. Its control unit uses motor-current measurements and the motor’s rotation angle to perform feedback computations in relation to the carrier cycle. An average acquisition unit obtains an average current over a carrier half-cycle or uses a current value measured at an available timing as an approximation of that average.

- Control Apparatus for Electric Rotating Machine. This invention adjusts current-sensor readings according to operating conditions and temperature. At lower electrical angular speeds, the apparatus compensates the U-phase and V-phase current readings using measured and estimated sensor temperatures. At higher speeds, it bases compensation for both readings on the temperature measured by the U-phase temperature sensor.

Career Highlights

Fujishima’s listed inventions focus on control systems that support reliable operation of electric motors and rotating machines. His work addresses PWM-based motor control, current measurement, and temperature-dependent sensor compensation.

Collaborations

Fujishima is associated with Denso Corporation. Akiyoshi Morii is identified as a coworker.

Conclusion

Yuya Fujishima’s patent work reflects a focus on improving electric motor control through accurate current acquisition and sensor compensation.