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    • 4. 发明专利
    • DE4120243C2
    • 1999-02-25
    • DE4120243
    • 1991-06-19
    • MITSUBISHI ELECTRIC CORP
    • TAKEI HIDEAKIMIZOUE TSUGUYASUKOBAYASHI YOSHIHARUOKITA RYOSUKEYAMADA MASAYA
    • F16D37/02G01L3/10
    • A magnetic particle type electromagnetic clutch has two clutch discs so disposed that the two discs can be electromagnetically connected together and disconnected. In a space between the two discs are charged magnetic particles. When an excitation current is run through the excitation coil disposed near the two discs to produce a magnetic flux, the two discs and magnetic particles are magnetized to be connected in unison, thereby transmitting a torque from the drive shaft to the driven shaft. The two discs are each secured to the tip end of the shafts. The shaft has two groups of magnetic layers which are rigidly affixed to the shaft and axially spaced. Each of the groups of magnetic layers is directed + 45 degrees or - 45 degrees with respect to the axis of the shaft. When the shafts start to rotate, magnetostriction is developed in the respective magnetic layers resulting in a change in permeability. The change in permeability is causes the change in impedance of a first and second detecting coils so disposed that they face the magnetic layers. The change in impedance is electrical representation of the torque applied to the shafts.
    • 5. 发明专利
    • DE4120243A1
    • 1992-01-09
    • DE4120243
    • 1991-06-19
    • MITSUBISHI ELECTRIC CORP
    • TAKEI HIDEAKIMIZOUE TSUGUYASUKOBAYASHI YOSHIHARUOKITA RYOSUKEYAMADA MASAYA
    • F16D37/02G01L3/10
    • A magnetic particle type electromagnetic clutch has two clutch discs so disposed that the two discs can be electromagnetically connected together and disconnected. In a space between the two discs are charged magnetic particles. When an excitation current is run through the excitation coil disposed near the two discs to produce a magnetic flux, the two discs and magnetic particles are magnetized to be connected in unison, thereby transmitting a torque from the drive shaft to the driven shaft. The two discs are each secured to the tip end of the shafts. The shaft has two groups of magnetic layers which are rigidly affixed to the shaft and axially spaced. Each of the groups of magnetic layers is directed + 45 degrees or - 45 degrees with respect to the axis of the shaft. When the shafts start to rotate, magnetostriction is developed in the respective magnetic layers resulting in a change in permeability. The change in permeability is causes the change in impedance of a first and second detecting coils so disposed that they face the magnetic layers. The change in impedance is electrical representation of the torque applied to the shafts.
    • 8. 发明专利
    • Electromagnetic Clutch or Brake.
    • GB1198648A
    • 1970-07-15
    • GB4053967
    • 1967-09-05
    • MITSUBISHI ELECTRIC CORP
    • MURATA TOSHIYATAKAHASHI TOSHIYUKIKOBAYASHI YOSHIHARU
    • F16D37/02F16D63/00F16D65/78
    • 1,198,648. Electromagnetic brakes and Clutches. MITSUBISHI DENKI K.K. 5 Sept., 1967, No. 40539/67. Heading H2A. In an electromagnetic coupling including a stationary member and one (in a brake) or two (in a clutch) rotatable members, a wall of the stationary member facing the rotatable member(s) includes a portion of reduced thickness and high reluctance which magnetically divides the wall into two portions so that flux produced by a coil in the stationary member is forced through one wall portion, across a working air gap containing magnetic particles and back through the other wall portion, there being a coolant channel between the coil and the wall. The brake shown includes a stationary member 10, 12 separated from a rotatable member 34 by an air gap 38 containing magnetic particles 40. The coolant channel comprises a V-shaped trough in a wall 12 of the stationary member, this trough also magnetically dividing the wall into two portions. The stationary member includes additional annular coolant channels 52, 54 and coolant supply ducts 64, 66. A clutch, Fig. 2 (not shown), includes a stationary member (110, 112), similar to that in Fig. 1, surrounding two coaxial radially spaced rotatable members (134, 135) separated by an air gap (138) containing magnetic particles (140).