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05/2002 | ワシントン大学 CIMS
Spring Seminar Series［発表要旨］ Design of High Power Actuators based on Hybrid Reluctance Magnet 1. Abstract  A hybrid reluctance magnet (a
new electromagnet by utilizing a permanent magnet) was studied
to apply new type of high torque actuator. The torque is about
twice larger than that on the actuator except a permanet magnet.
I will bring the actuator with a hybrid reluctance magnet and
demonstate it. We developed a solenoid and motor,
applying this hybrid reluctance magnet. This new solenoid shows
the same power with one fourth power input, compared to a conventional
one. The motor shows 20% faster speed with no load and four times
larger torque with load, compared to a conventional one. Although
most of solenoids today are AC (DC does not give enough power),
demands for ones for DC have been growing and our solenoid is
much anticipated to become successful.Our motor can be applied for a
small motor such as a PC and DVD since it shows faster rotation
without load than a conventional one. Moreover, it gives high
torque in the low speed area, so it is highly expected to be
used for an electric vehicle.This technique won Silver Prize
of The 3rd Japan-France Seminar on Intelligent Material and Structures
in August, 2000 and it has been under R&D as a project by
NEDO (New Energy and Industrial Technology Development Organization)
of Ministry of Economy, Trade and Industry.2. Electromagnetic FEM analysis of Hybrid reluctacne magnet Ansys is used for electromagnetic
analysis (FEM). We asked Steibeis Foundation to do it under the
support of Minister of Economy, Trade and Industry. 3. Vector of magnetic flux (compare electromagnet to Hybrid reluctance magnet)  4. Input current 1A : Hybrid reluctance magnet
does not function because input current is not enough, relatively
reluctance of air gap is large. Flux of electromagnet cannot
beat one of permanent magnet.3A : Hybrid reluctance magnet
functions because input current is enough, relatively reluctance
of air gap is large. Flux of electromagnet can beat one of permanent
magnet. 5. Air gap Hybrid reluctance magnet can be
utilized effectively by decreasing gap. Air gap (reluctance)
changes the amount of magnetic flux of a mobile material. 6. Working face  Focus
on the elements in the direction of Z-Axis only and study the
density of magnetic field of the surface.All three patterns show magnetic
flux density on the working face is slightly high around permanent
magnet, but overall they are even.7. Applied products "Solenoid" We have also developed a thin
solenoid used for a vending machine. 8. Conclusion  In
summary, the solenoid with a Hybrid reluctance magnet can get
high power and high efficiency. We have already verified that
the same features are got for the motor by joint research with
Tokai University (Japan).Total market size of actuators has been very huge. Our Technology is expected to revolutionize market. And even has potential to change energy generation system. |