Effects of Experimental Factors on Steady Characteristics on Devices of Rotating Disk Type Using ERF with Smectite Particles.

Torque and current density on a rotating disk immersed in suspension-type electrorheological fluid (ERF) under AC electric field were measured. They have steady and varying amplitude components which depend on the angular velocity of the disk, and the frequency and intensity of the electric field. The results were demonstrated by means of a particle aggregation model. The constant torque and current density under DC electric field were compared to those under AC field. The magnitudes of the differences strongly depend on the angular velocity of the disk and the frequency of the electric field. When an AC electric field is used, a smaller frequency should be applied for the sake of greater efficiency.

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“…At larger f, T C is smaller. 3. At every f, I A decreases according to the increase of D. At larger f, I A is smaller.…”

Section: Current Densitymentioning

confidence: 90%

“…We used the disk-type rotating device used previously in experimental investigations as shown in Figure 1 [2,3]. The rotating disk in ERF has a diameter d d ¼ 90.0 mm and a thickness 8.00 mm.…”

Section: Methodsmentioning

confidence: 99%

Electrorheological Rotating Disk Clutch Mechanism Under AC Electric Field: Part I - Torque and Current Density

Shimada

Nishida

2002

Journal of Intelligent Material Systems and Structures

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“…We used just the same experimental apparatus with a disk-type rotating device presented previously in experimental investigations [1][2][3]. Therefore, precise explanations are omitted here.…”

Section: Methodsmentioning

confidence: 99%

Electrorheological Rotating Disk Clutch Mechanism Under AC Electric Field: Part II - Efficiency Metrics

Shimada

Nishida

Akagami

2002

Journal of Intelligent Material Systems and Structures

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Electric power and efficiency on a rotating disk under AC electric field with suspension-type electrorheological fluid (ERF) were investigated. This report also dealt with the time lags of torque and current density from the applied eloctric field. Especially, the time lag of the current density was arranged by the power factor. The time lag of the torque is changed larger than the one of the current density. On the other hand, the data of the torque and the current density have steady and varying characteristics as amplitude components. Therefore, we need to investigate four electric powers: apparent power, effective power, steady power from the steady component of the current density and total power. From the three electric powers, we can deal with three efficiency of the electric power to the torque. They depend on the angular velocity of the disk, frequency and intensity of the electric field. The results were explained with the particles aggregation model.

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Transient characteristic of torque on rotating device types utilizing ER Fluid

Nishida¹,

Shimada²,

Fujita³

et al. 2006

TRANSACTIONS OF THE JAPAN FLUID POWER SYSTEM SOCIETY

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Effects of Experimental Factors on Steady Characteristics on Devices of Rotating Disk Type Using ERF with Smectite Particles.

Cited by 3 publications

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Electrorheological Rotating Disk Clutch Mechanism Under AC Electric Field: Part I - Torque and Current Density

Electrorheological Rotating Disk Clutch Mechanism Under AC Electric Field: Part I - Torque and Current Density

Electrorheological Rotating Disk Clutch Mechanism Under AC Electric Field: Part II - Efficiency Metrics

Transient characteristic of torque on rotating device types utilizing ER Fluid

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