scholarly journals Positioning Characteristics of a MEMS Linear Motor Utilizing a Thin Film Permanent Magnet and DLC Coating

2013 ◽  
Vol 7 (2) ◽  
pp. 148-155 ◽  
Author(s):  
Ryogen Fujiwara ◽  
◽  
Tadahiko Shinshi ◽  
Minoru Uehara ◽  
Keyword(s):  
Thin Film ◽  
Permanent Magnet ◽  
High Performance ◽  
Motor System ◽  
High Heat ◽  
Linear Motor ◽  
Two Phase ◽  
Dlc Coatings ◽  
Dlc Coating ◽  
Moving Magnet

A high performance Nd2Fe14B/Ta thin film Permanent Magnet (PM) not only has a high remnant flux density and a high coercive force similar to those of a conventional sintered Nd2Fe14B magnet, but also has a high heat tolerance. Using a thin film PM, we developed a moving-magnet typeMEMS linearmotor consisting of a silicon slider including a multi-pole magnetized thin film PM, a linear guideway made from silicon, and a two-phase micro-coil. Diamond-Like Carbon (DLC) coatings were used in order to reduce the friction force between the slider and the guideway. The purpose of this study is to realize feedback positioning of the MEMS linear motor and to investigate the dynamics of the linear motor system. In a driving experiment, the minimum current and voltage to start the slider were less than 0.26 A and 0.6 V, respectively. In positioning tests, the positioning resolution and bandwidth were 100 µm and 54 Hz, respectively.

Congratulations! The Best Paper Award 2014

2014 ◽  
Vol 8 (5) ◽  
pp. 623-623
Author(s):  
Editorial Office
Keyword(s):  
Thin Film ◽  
Permanent Magnet ◽  
Selection Process ◽  
Linear Motor ◽  
Paper Award ◽  
Award Winner ◽  
Dlc Coating ◽  
Future Success ◽  
Automation Technology

The fifth Best Paper Award 2014 ceremony was held in Kasumigaseki, Tokyo, Japan, on August 1, 2014, attended by the winner and IJAT committee members who took part in the selection process. The Best Paper was severely selected from among 84 papers published in Vol.7 (2013). The Best Paper Award winner was given a certificate with a nearly US$1,000 honorarium. We congratulate the winner and sincerely wish for his future success.   Title: Positioning Characteristics of a MEMS Linear Motor Utilizing a Thin Film Permanent Magnet and DLC Coating Authors: Ryogen Fujiwara, Tadahiko Shinshi, and Minoru Uehara Int. J. of Automation Technology Vol.7 No.2, March, 2013

Congratulations! The Best Paper Award 2014

2014 ◽  
Vol 8 (5) ◽  
pp. 623-623
Author(s):  
Editorial Office
Keyword(s):  
Thin Film ◽  
Permanent Magnet ◽  
Selection Process ◽  
Linear Motor ◽  
Paper Award ◽  
Award Winner ◽  
Dlc Coating ◽  
Future Success ◽  
Automation Technology

The fifth Best Paper Award 2014 ceremony was held in Kasumigaseki, Tokyo, Japan, on August 1, 2014, attended by the winner and IJAT committee members who took part in the selection process. The Best Paper was severely selected from among 84 papers published in Vol.7 (2013). The Best Paper Award winner was given a certificate with a nearly US$1,000 honorarium. We congratulate the winner and sincerely wish for his future success.   Title: Positioning Characteristics of a MEMS Linear Motor Utilizing a Thin Film Permanent Magnet and DLC Coating Authors: Ryogen Fujiwara, Tadahiko Shinshi, and Minoru Uehara Int. J. of Automation Technology Vol.7 No.2, March, 2013

Congratulations! The Best Paper Award 2014

2014 ◽  
Vol 8 (5) ◽  
pp. 623-623
Author(s):  
Editorial Office
Keyword(s):  
Thin Film ◽  
Permanent Magnet ◽  
Selection Process ◽  
Linear Motor ◽  
Paper Award ◽  
Award Winner ◽  
Dlc Coating ◽  
Future Success ◽  
Automation Technology

The fifth Best Paper Award 2014 ceremony was held in Kasumigaseki, Tokyo, Japan, on August 1, 2014, attended by the winner and IJAT committee members who took part in the selection process. The Best Paper was severely selected from among 84 papers published in Vol.7 (2013). The Best Paper Award winner was given a certificate with a nearly US$1,000 honorarium. We congratulate the winner and sincerely wish for his future success.   Title: Positioning Characteristics of a MEMS Linear Motor Utilizing a Thin Film Permanent Magnet and DLC Coating Authors: Ryogen Fujiwara, Tadahiko Shinshi, and Minoru Uehara Int. J. of Automation Technology Vol.7 No.2, March, 2013

Modeling and Parameter Identification for Condition Monitoring of Surface-Mount Permanent Magnet Machines Under Magnet Demagnetization

2020 ◽  
Author(s):  
Fanny Pinto Delgado ◽  
Ziyou Song ◽  
Heath F. Hofmann ◽  
Jing Sun
Keyword(s):  
Permanent Magnet ◽  
Condition Monitoring ◽  
High Performance ◽  
High Efficiency ◽  
Health Condition ◽  
Maintenance Cost ◽  
Parameter Estimator ◽  
Two Phase ◽  
Machine Model ◽  
Surface Mount

Abstract Permanent Magnet Synchronous Machines (PMSMs) have been preferred for high-performance applications due to their high torque density, high power density, high control accuracy, and high efficiency over a wide operating range. During operation, monitoring the PMSM’s health condition is crucial for detecting any anomalies so that performance degradation, maintenance/downtime costs, and safety hazards can be avoided. In particular, demagnetization of PMSMs can lead to not only degraded performance but also high maintenance cost as they are the most expensive components in a PMSM. In this paper, an equivalent two-phase model for surface-mount permanent magnet (SMPM) machines under permanent magnet demagnetization is formulated and a parameter estimator is proposed for condition monitoring purposes. The performance of the proposed estimator is investigated through analysis and simulation under different conditions, and compared with a parameter estimator based on the standard SMPM machine model. In terms of information that can be extracted for fault diagnosis and condition monitoring, the proposed estimator exhibits advantages over the standard-model-based estimator as it can differentiate between uniform demagnetization over all poles and asymmetric demagnetization between north and south poles.

scholarly journals Multi-pole Magnetization of Thin Film Neodymium Permanent Magnet and Fabrication of a MEMS Linear Motor Using the Magnetized Magnet

2013 ◽  
Vol 79 (8) ◽  
pp. 773-778 ◽  
Author(s):  
Ryogen FUJIWARA ◽  
Masato ISHIBASHI ◽  
Tadahiko SHINSHI ◽  
Minoru UEHARA ◽  
Michitaka HORI ◽  
...  
Keyword(s):  
Thin Film ◽  
Permanent Magnet ◽  
Linear Motor

Cogging Force Analysis of Moving Magnet Type Permanent Magnet Synchronous Linear Servo Motor

2015 ◽  
Vol 741 ◽  
pp. 663-668
Author(s):  
Zhi Gang Shen ◽  
Qing Wang ◽  
Qing Jie Sun ◽  
Hong Xing Wu
Keyword(s):  
Permanent Magnet ◽  
Structural Characteristics ◽  
Linear Motor ◽  
Middle Part ◽  
Servo Motor ◽  
Direct Drive ◽  
Force Analysis ◽  
Detent Force ◽  
Maximum Value ◽  
Moving Magnet

Linear motor eliminates the middle part of mechanical drive train, but because of structural characteristics of itself, must to take effective measures to reduce thrust fluctuations, or direct drive will lost its original meaning. In this paper, firstly research on detent force of moving magnet type permanent magnet synchronous linear servo motor and analyze the principle of generate detent force, secondly analyze the cogging force of moving magnet type permanent magnet synchronous linear motor and obtain the expression of cogging force maximum value, finally propose effective method to reduce detent force.

Site-Specific and On-Demand High Heat-Flux Cooling Using Superlattice Based Thin-Film Thermoelectrics

2009 ◽  
Author(s):  
Ihtesham Chowdhury ◽  
Ravi Prasher ◽  
Kelly Lofgreen ◽  
Sridhar Narasimhan ◽  
Ravi Mahajan ◽  
...  
Keyword(s):  
Thin Film ◽  
Heat Flux ◽  
Thermal Management ◽  
High Performance ◽  
High Heat ◽  
Thermoelectric Device ◽  
High Heat Flux ◽  
General Will ◽  
Site Specific ◽  
Fully Integrated

We have recently reported the first ever demonstration of active cooling of hot-spots of >1 kW/cm2 in a packaged electronic chip using thin-film superlattice thermoelectric cooler (TEC) cooling technology [1]. In this paper, we provide a detailed account of both experimental and theoretical aspects of this technological demonstration and progress. We have achieved cooling of as much as 15°C at a location on the chip where the heat-flux is as high as ∼1300 W/cm2, with the help of a thin-film TEC integrated into the package. To our knowledge, this is the first demonstration of high heat-flux cooling with a thin-film thermoelectric device made from superlattices when it is fully integrated into a usable electronic package. Our results, which validate the concept of site-specific micro-scale cooling of electronics in general, will have significant potential for thermal management of future generations of microprocessors. Similar active thermal management could also be relevant for high-performance solid-state lasers and power electronic chips.

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