Design of Small Variable Frequency Speed Regulation System Based on ARM

2014 ◽  
Vol 635-637 ◽  
pp. 1155-1158
Author(s):  
Chao Ye ◽  
Ting You Wang ◽  
Ye Yuan
Keyword(s):  
Control System ◽  
High Efficiency ◽  
Frequency Control ◽  
Low Cost ◽  
Control Signal ◽  
Regulation System ◽  
Power Module ◽  
Current Frequency ◽  
Frequency Control System ◽  
Wide Range

This paper presents a small ARM-based frequency control system, the voltage 220V/50Hz mains, rectified, filtered into DC, then reverse into adjustable frequency alternating current supplied to the motor used. Through software algorithms SPWM control signal generated by the microcontroller, the control signal sent through the intelligent power module, the realization of the DC inverter process. The design is simple, functional and meet the current frequency control system, modular, digital trends, has a waveform, small size, high efficiency, frequency wide range of features. Has good practical value and low cost.

scholarly journals Near-infrared Integral-Field Spectrograph (NIFS): An Instrument Proposed for Gemini

1999 ◽  
Vol 16 (3) ◽  
pp. 273-287 ◽  
Author(s):  
Peter J. McGregor ◽  
Peter Conroy ◽  
Gabe Bloxham ◽  
Jan van Harmelen
Keyword(s):  
Control System ◽  
Near Infrared ◽  
High Efficiency ◽  
Low Cost ◽  
High Redshift ◽  
Target Velocity ◽  
Wide Range ◽  
Integral Field Spectrograph ◽  
Field Unit ◽  
Integral Field

AbstractIn late 1998 the International Gemini Project Office identified a need for a low cost, near-infrared spectrograph to be commissioned on the Gemini South telescope on the shortest possible timescale. In response, the Research School of Astronomy and Astrophysics of the Australian National University proposed to design, construct, and commission a near-infrared, integral-field spectrograph on Gemini. The science drivers and novel design of the Near-infrared Integral-Field Spectrograph (NIFS) are described in this paper. NIFS will achieve significant economies in cost and schedule in several ways:• By addressing targeted science with high efficiency. NIFS will primarily target velocity measurements in galaxies to study the demographics of black holes in galactic nuclei and the evolution of structural properties in high redshift galaxies. However, NIFS will also be applied to a wide range of general astronomical topics, but these will not dictate the instrument design.• By adopting a largely fixed-format design. A 3·2″ × 3·2″ ‘stair-case’ integral field unit (IFU) will feed a near-infrared spectrograph with four fixed-angle gratings mounted on a single grating wheel. A single, fixed-format camera will form the spectral image on a 2048 × 2048 Rockwell HgCdTe HAWAII-2 array. Two-pixel spectral resolving powers of ∼5400 will be achieved with complete wavelength coverage in each of the J, H, and K photometric bands through 32 optimally sampled 0·1″ wide slitlets. The velocity resolution of ∼55 km s−1 will be sufficient to achieve the targeted science objectives, and will allow software rejection of OH airglow lines.• By packaging the NIFS instrument within a duplicate of the Near-Infrared Imager (NIRI) cryostat. The NIRI cryostat, On-Instrument Wavefront Sensor (OIWFS), detector focusing mechanism, control system, and EPICS software will all be duplicated with only minimal change. Construction of the duplicate NIRI cryostat, OIWFS, and control system will be done by the University of Hawaii.

Frequency Control System of Liner Motor Based on AVR Micro-Controller

2013 ◽  
Vol 416-417 ◽  
pp. 681-685
Author(s):  
Xiao Jie Ye ◽  
Dong Ru Sun ◽  
Liang Cheng ◽  
Yi Hua Yao ◽  
Yun Yue Ye
Keyword(s):  
Control Strategy ◽  
Power Supply ◽  
Frequency Control ◽  
Regulation System ◽  
Variable Frequency ◽  
Household Appliance ◽  
Speed Regulation ◽  
Frequency Control System ◽  
Three Phase ◽  
Frequency Power

According to the requirement for variable-frequency power supply when a liner motor runs in a household appliance, a variable frequency speed regulation system of three-phase SPWM is designed based on ATmega48 Micro-controller. The hardware structure, the SPWM technology of software program and V/f control strategy are analyzed. In the end of this paper, experiment waves are illustrated. The results show that the running of the system is simple and convenient; the reliability of the system is excellent.

The study of the emission frequency control system stability in hydropulse generator

2017 ◽  
Author(s):  
Andrey A. Kapelyuhovskiy ◽  
Alexandra A. Kapelyuhovskaya ◽  
Elena P. Stepanova
Keyword(s):  
Control System ◽  
Frequency Control ◽  
System Stability ◽  
Emission Frequency ◽  
Frequency Control System
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