Eiji Kubozuka

Title: Eiji Kubozuka and Stepping Motor Control Innovations.

Introduction

Eiji Kubozuka is an inventor associated with Kiryu, Japan, and Japan Servo Co., Ltd. His patent work focuses on circuits for controlling and driving stepping motors. The supplied information lists 2 patents.

Latest Patents

Kubozuka’s listed patents address current regulation and reliable motor operation.

“Stepping Motor Controller” describes a controller that detects a motor and supplies a constant current to its winding for a predetermined period. Its circuitry compares a reference voltage with the voltage drop across the winding, then uses the comparison to set the current level for PWM constant-current control.

“Driving Circuit of Stepping Motor” describes a circuit that controls stepping-motor excitation through power-switching transistors. Zener diodes protect the driver and switching components, with their voltage ratings selected in relation to the power supply and the driver’s maximum rated voltage.

Career Highlights

Kubozuka’s documented inventions demonstrate work on practical stepping-motor electronics, including current-setting control and protective circuit design. Both patents concern components that support controlled motor operation.

Collaborations

The supplied information identifies Japan Servo Co., Ltd. as Kubozuka’s company and Hitoshi Ando as a coworker. No further details about their specific collaboration are provided.

Conclusion

Eiji Kubozuka’s listed patents reflect a focused contribution to stepping-motor technology through current control and circuit protection.