Modeling and identification of an electrostatic motor

Yamamoto, Akio; Niino, Toshiki; Higuchi, Toshiro

doi:10.1016/j.precisioneng.2005.06.004

Cited by 60 publications

(50 citation statements)

References 7 publications

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“…The skew effect was considered by taking moving average of the original results over 1.5 times electrode pitch. (19) Comparisons of the results with the measured values in §3.2 are shown in Fig. 11.…”

Section: Fem Model For Calculating Capacitancesmentioning

confidence: 89%

“…(17)- (19) The generalized model shown in Fig. 3, which has mphase for the slider and n-phase for the stator, can be modeled using the capacitance network shown in Fig.…”

Section: Induced Voltages and Forces Of M-to-n Phase Combinationmentioning

confidence: 99%

“…The driving electrode has a pitch of 0.2 mm and is skewed with 0.75 pitches for better accordance with the theoretical model, as described in. (19) (In 3-3 phase motor, electrode skew is essential to obtain sinusoidal capacitance variation, (19) whereas 2-4 phase motor naturally possesses sinusoidal variation. (17) ) The thickness of the electrodes is 35 μm, which is almost twice as that for the 2-4 phase motor.…”

Section: Experimental Verificationmentioning

confidence: 99%

“…(17) ) The thickness of the electrodes is 35 μm, which is almost twice as that for the 2-4 phase motor. Capacitances for both motors were measured at 1 kHz by the method described in (19) and were found as in Table 1.…”

Section: Experimental Verificationmentioning

confidence: 99%

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Effects of Electrode Configuration for Performances of Voltage-Induction-Type Electrostatic Motors

Yamashita

Yamamoto

Higuchi

2013

JAMDSM

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This paper describes a general theory for the characteristics of voltage-induction-type electrostatic motors (VITEMs). VITEMs are one of macro-scale electrostatic film motors with multi-phase electrodes on both the sliders and the stators. The motor drives synchronously without voltage feeding wires to its slider due to the indirect power supply using electrostatic induction. Although the numbers of electrode phases can be chosen arbitrary to realize the motor, the characteristics of the motors were analyzed only for two specific cases in the previous studies. This work extends the previously proposed theories so that they can handle a general case, in which the slider and the stator have m-and n-phase electrodes with arbitrary numbers for m and n. The theory can estimate the optimized thrust force performance for any electrode configurations, when given fundamental parameters regarding the capacitance coefficients of the motor, which can be obtained either experimentally or numerically. Using the proposed theory, several different configurations of VITEMs are analyzed and compared, in terms of thrust force performance. The results indicate that electrode thickness considerably affects the thrust force performance of VITEMs, which is not the case for other synchronous electrostatic film motors, and thus suggest that the design of VITEMs should more carefully consider the three-dimensional structure of the electrodes.

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Section: Fem Model For Calculating Capacitancesmentioning

confidence: 89%

“…(17)- (19) The generalized model shown in Fig. 3, which has mphase for the slider and n-phase for the stator, can be modeled using the capacitance network shown in Fig.…”

Section: Induced Voltages and Forces Of M-to-n Phase Combinationmentioning

confidence: 99%

Section: Experimental Verificationmentioning

confidence: 99%

Section: Experimental Verificationmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Electrode Configuration for Performances of Voltage-Induction-Type Electrostatic Motors

Yamashita

Yamamoto

Higuchi

2013

JAMDSM

Self Cite

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“…The motor comprises a pair of boards, which function as a slider and a stator. In a board, three-phase skewed electrodes [20] are allocated at an interval of 200 μm. Between the boards, a myriad of glass beads with 20 μm in diameter are disseminated to reduce the friction.…”

Section: Development Of a 2-dof Electrostatic Haptic Joystickmentioning

confidence: 99%

Development of a 2-DOF electrostatic haptic joystick for MRI/fMRI applications

Hara

Matthey

Yamamoto

et al. 2009

2009 IEEE International Conference on Robotics and Automation

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Abstract-This paper describes the development of a 2-DOF electrostatic haptic joystick designed for neuroscience studies in an MRI/fMRI. The joystick is fabricated using non-magnetic materials and actuated by two high-power electrostatic motor units which produce various force fields in the horizontal plane. The electrostatic motor is a synchronous drive and thus the positioning of the joystick is achieved in an open-loop control. As for force sensing, a 2-DOF force sensor is developed using non-magnetic materials and optical fibers so as to measure interaction force with a user; hence, the haptic rendering is based on the admittance control scheme that respects the rule of force-in and position-out. The operation of both the actuators and force sensor respects non-magnetic principles. Thus, the haptic joystick into which these components are integrated is expected to have high MR compatibility, although the evaluation of the MR compatibility is beyond the scope of this paper. In this paper, the device performance is evaluated in the normal environment, which verifies the operation of the unique electrostatic haptic device.

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Applications of Electrostatic Actuators Within Special Environments

Yamamoto

2010

Next-Generation Actuators Leading Breakthroughs

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Modeling and identification of an electrostatic motor

Cited by 60 publications

References 7 publications

Effects of Electrode Configuration for Performances of Voltage-Induction-Type Electrostatic Motors

Effects of Electrode Configuration for Performances of Voltage-Induction-Type Electrostatic Motors

Development of a 2-DOF electrostatic haptic joystick for MRI/fMRI applications

Applications of Electrostatic Actuators Within Special Environments

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