Location History:
- Hitachi, JA (1976 - 1977)
- Hitachi, JP (1978 - 1983)
Company Filing History:
Years Active: 1976-1983
Title: Takeo Maeda: Innovator in Electrical Engineering
Introduction
Takeo Maeda is a prominent inventor based in Hitachi, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of advanced motor technologies and detection methods for electrical systems. With a total of 8 patents to his name, Maeda's work has had a lasting impact on the industry.
Latest Patents
One of Maeda's latest patents is a method and apparatus for detecting short circuits in the arm of a GTO inverter. This innovative approach involves sensing the voltage across the reactor to identify short circuits effectively. In one method, the detection occurs when voltages are simultaneously applied to both a P-line arm reactor and an N-line arm reactor for a predetermined time period. Another method detects a short circuit when the integrated value of the voltage across at least one of the reactors exceeds a predetermined level.
Another notable invention by Maeda is the slotless brushless motor. This design features a permanent magnet rotor that rotates with a shaft, while a stationary armature coil is positioned in opposition to the rotor. The armature coil consists of a concentrically wound coil portion, an adjacent coil portion, and multiple coils laid on top of each other, each differing in phase. This innovative design enhances the efficiency and performance of brushless motors.
Career Highlights
Maeda has dedicated his career to advancing electrical engineering technologies. His work at Hitachi, Ltd. has positioned him as a key figure in the development of innovative solutions for modern electrical systems. His patents reflect his commitment to improving the functionality and reliability of electrical devices.
Collaborations
Throughout his career, Maeda has collaborated with esteemed colleagues, including Yasuo Matsuda and Kazuo Honda. These partnerships have fostered a creative environment that has led to groundbreaking advancements in their respective fields.
Conclusion
Takeo Maeda's contributions to electrical engineering through his innovative patents and collaborative efforts have significantly influenced the industry. His work continues to inspire future advancements in technology.