Yuichi Shimizu

Title: Innovations of Yuichi Shimizu

Introduction

Yuichi Shimizu is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of power conversion and air conditioning technologies. With a total of 13 patents to his name, Shimizu's work has had a substantial impact on modern engineering practices.

Latest Patents

Shimizu's latest patents include a power conversion apparatus and an air conditioner. The power conversion apparatus features a rectifier circuit that rectifies a first alternating-current voltage, a reactor connected to the rectifier circuit, and a capacitor connected to the output end of the rectifier circuit. An inverter is also included, which generates a second alternating-current voltage through the operations of multiple switching elements. This inverter applies the second alternating-current voltage to a motor, which consists of a stator and a rotor. A control unit performs operation controls on the switching elements, allowing the inverter to apply a high-frequency second alternating-current voltage to the motor, generating a regenerative current without impairing the capacitor.

Additionally, his drive device and fluid utilization device patent includes a power converter, magnetic pole position identification units, a subtractor, and a current control unit. This innovative drive device supplies power to both a main-side synchronous motor and a sub-side synchronous motor connected in parallel. The subtractor calculates an angular difference using the magnetic pole positions of the motors, while the current control unit manages the power converter