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Advanced Energy Systems (Nakamura) Lab
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The lab supports electrical energy with motors and magnetic gears.
AboutAbout the lab
Building a sustainable society with electrical machines.
The Nakamura Lab studies electrical machines such as motors and generators, and technologies for using electrical energy efficiently.
Its targets are the electrical machines that support the generation, transmission, conversion, and use of electrical energy, and the systems that combine them.
Besides magnetic gears, which transmit power by the force of magnets, the lab works on wind power generation, power systems, and next-generation mobility.
In April 2026, the lab moved to the Department of Electrical Energy Systems.
Key terms
- Magnetic gear
- A device that transmits power without contact, unlike ordinary gears, using the electromagnetic force acting between magnets
- Magnetic-geared motor
- A motor that integrates a magnetic gear and a motor into a single unit
- Variable inductor
- A magnetic device used in equipment that stabilizes the voltage of a power system
NewsLab news
A paper by a doctoral student has been published as Early Access in IEEE Transactions on Industry Applications
A doctoral student received the Outstanding Paper Award for Young Engineers at IPEC-Nagasaki 2026
A paper from the lab and a review article by the professor were published in the IEEJ Transactions on Fundamentals and Materials (Transactions A)
A paper by a doctoral student has been published as Early Access in IEEE Transactions on Magnetics
A paper by a doctoral student was published in the Journal of the Magnetics Society of Japan
ResearchResearch themes
The Nakamura Lab aims to realize a sustainable society in which human society and the natural environment are in harmony. It conducts research that contributes to building advanced electrical machines that support electrical energy from generation through transmission, conversion, and use, and application systems that combine them.
*Illustrative imageHigher-Performance Motors and Generators
Demand for motors keeps growing. To develop compact, high-power, high-efficiency motors and generators, the lab studies optimal design and optimal control methods for permanent magnet (PM) motors and switched reluctance (SR) motors.
*Illustrative imageNon-Contact Magnetic Gears and Magnetic-Geared Motors
Mechanical gears produce vibration, noise, wear, and heat because the gear teeth touch each other. Magnetic gears transmit power without contact, using the electromagnetic force between magnets. The lab studies improving their performance, as well as magnetic-geared motors that integrate a magnetic gear with a motor.
*Illustrative imageMagnetic Gears for Offshore Wind Power
Suitable onshore sites are becoming harder to secure, and large-scale offshore wind power is expected to become practical. The lab believes magnetic gears have the advantage in every respect, including size, weight, maintenance, and cost, and is researching them toward practical use.
*Illustrative imageVoltage Stabilizers for Power Systems
Solar and wind power generation depend on the weather, which causes grid voltage to fluctuate. The lab is developing a fast, low-cost, highly reliable voltage stabilizer that uses a magnetic device called a variable inductor, and it has been put to practical use within Tohoku Electric Power's service area.
MembersFaculty
The lab's members are faculty, staff, and students in the doctoral (working-professional and regular-course), master's, and undergraduate programs.As of 2026
- ProfessorKenji Nakamura
- Project Assistant ProfessorAyumi Nagai
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Single wind turbine blade at Little Cheyne Court (Kent) - geograph.org.uk - 904241” john dodgson / CC BY-SA 2.0 (cropped)
- Higher-Performance Motors and Generators: “Stator Winding of a BLDC Motor” Medvedev / CC BY-SA 3.0 (cropped)
- Non-Contact Magnetic Gears and Magnetic-Geared Motors: “Gearbox retouched” unknown/F. A. Brockhaus (retouch Jahobr) / Public domain (cropped)
- Magnetic Gears for Offshore Wind Power: “Harwich Greater Gabbard Siemens windturbine nacelles” TGCP / Public domain (cropped)
- Voltage Stabilizers for Power Systems: “Muurame electrical substation transformer” Antti Leppänen / CC BY 4.0 (cropped)
- Related lab (Next-Generation Spin Electronics Materials Engineering [Tsunoda] Lab): “Actuator arm assembly of a hard disk drive” Mk2010 / CC BY 4.0 (cropped)
- Related lab (Spintronics Lab): “NXP PCF8577C LCD driver with I²C (Colour Corrected)” cole8888, https://flickr.com/photos/ @N05/ (aka Cole L) / CC BY-SA 2.0 (cropped)
- Related lab (Nakamura Lab): “Bacillus bacteria growth under the microscope 3” Korinna / CC BY 4.0 (cropped)
- Related lab (Ono Lab): “U.S. Department of Energy - Science - )” U.S. Department of Energy from United States / Public domain (cropped)
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