This inventor holds 10 USPTO granted patents and 3 EPO patents. Top assignees: Denso Corporation, Toyota Jidosha Kabushiki Kaisha. Active years: 2006-2012.
Location History:
- Anjo, JP (2006 - 2011)
- Tsukuba, JP (2012)
Company Filing History:
10 out of 20,378 
1 out of 38,774 
Years Active: 2006-2012
Title: Keiichi Kawakami: Innovator in Motor Control Technology
Introduction
Keiichi Kawakami is a prominent inventor based in Anjo, Japan, known for his significant contributions to motor control technology. With a total of 10 patents to his name, Kawakami has made strides in the development of advanced control apparatuses for alternating-current motors and electric vehicles.
Latest Patents
One of his latest patents is an "Alternating-current motor control apparatus." This innovative control apparatus estimates the output torque of an alternating-current motor by utilizing data from a current sensor and a rotation angle sensor. It executes torque feedback control by adjusting the phase of rectangular wave voltage based on the difference between the estimated torque and a command value. The apparatus also features a switching interruption that outputs control commands to an inverter's switching element every 60 degrees of electrical angle. Additionally, it samples phase currents and converts them into d-axis and q-axis currents at predetermined electrical angles, which vary according to the motor's rotation speed.
Another notable patent is the "Control apparatus for electric vehicles." This system is designed for electric vehicles equipped with multiple motor-generator (MG) units, each containing an AC motor and an inverter. The control apparatus stabilizes system voltage by adjusting the input power of the MG units to minimize voltage variations. It selects one or both MG units based on their operational data to execute voltage stabilization control effectively.
Career Highlights
Kawakami has worked with leading companies in the automotive industry, including Denso Corporation and Toyota Motor Corporation. His experience in these organizations has allowed him to refine his expertise in motor control technologies and contribute to groundbreaking innovations.
Collaborations
Throughout his career, Kawakami has collaborated with notable colleagues such as Tsuneyuki Egami and Takashi Ogawa. These partnerships have fostered an environment of innovation and have led to the development of advanced technologies in the field.
Conclusion
Keiichi Kawakami's work in motor control technology has significantly impacted the automotive industry. His innovative patents and collaborations with leading companies and colleagues highlight his dedication to advancing technology in this field.