|
Inquiry | Top |
| Index | Profile | News | Products | Library |
|
Library |
08/2000 | 第3回日仏インテリジェント材料、構造セミナー［講演要旨］ Electrical motor with reluctance hybrid magnet system for next generation 1. Introduction  From an engineering point of view,
it is important to develop a high-torque small motor. Now, new
concept motors are almost developed. To occurs technology revolution,
a variable reluctance hybrid magnet have been studied to apply
new type of high torque motor.2. Experimental  Fig.1
shows schematic draw of variable reluctance hybrid magnet system.
The variable reluctance hybrid magnet composes a permanent magnet,
electrical coil and yoke. A variable reluctance hybrid magnet
is controlled by electromagnet in magnetic circuits. The motor
size is about 250 mm (diameter), 300 mm (depth).3. Results and Discussion  Fig.2
shows the change in flux density against coil current for the
basic factor of hybrid magnet system. The flux density increases
against coil current. The flux density of the hybrid magnet with
a permanent magnet is the five times higher than that without
a permanent magnet.Fig.3 shows the schematic draw
of cross section of prototype of high torque motor used by hybrid
magnet system. The stillness shaft torque was estimated by prototype
of high torque motor.Fig.4 shows the change in the
shaft torque against angle between hybrid magnet and mobile materials
of high torque motor with variable reluctance hybrid magnet system.
The shaft torque of stillness is about 1000 kgf cm at 20 A. The
torque is about twice than that without a permanent magnet. 4. Conclusion In summary, we studied a variable
reluctance hybrid magnet to apply new type of high torque motor.
The shaft torpue of stillness is about 1000 kgf cm at 20 A. The
torque is about twice than that without a permanent magnet. In
the future, it is possible that the effectance of the new concept
motor with the variable reluctance hybrid magnet will be about
20% - 50% higher efficiency than that of usual normal electrical
motors.References 1) Y.Ochiai, Y.Nishi, K.Oguri, S.Ogino and Y.Makabe, U.S.Pat. 10-27884 (Jan.27,1998). 2) Y.Ochiai, Y.Nishi, K.Oguri and S.Ogino , Jpn.Pat. Toku-kai-hei 11-214217, 1999. |