Low-cost digitally controlled DC/DC converter for HID electronic ballast

2012 ◽  
Author(s):  
Wang Bin ◽  
Li Jun
Keyword(s):  
Low Cost ◽  
Electronic Ballast ◽  
Digitally Controlled

scholarly journals Digitally Controlled Integrated Electronic Ballast with Dimming and Power Factor Correction Features

2010 ◽  
Vol 8 (03) ◽  
Author(s):  
C. Aguilar-Castillo ◽  
C.D. García-Beltrán ◽  
C. Morcillo-Herrera
Keyword(s):  
Power Factor ◽  
Power Factor Correction ◽  
Low Cost ◽  
Current Mode ◽  
Electronic Ballast ◽  
Series Resonant ◽  
Digitally Controlled ◽  
Power Stage ◽  
Lamp Current ◽  
Boost Rectifier

This paper presents a digitally controlled integrated electronic ballast with dimming and power factor correction features. The control circuit is based on a low-cost PIC16C71 microcontroller where the different strategies for energysaving have been implemented. The ballast is operating in closed loop achieving tight lamp current regulation through a digital Proportional-Integral algorithm. The integrated power stage is based on a frequency-controlled single-switch boost rectifier plus a half-bridge series resonant parallel loaded inverter sharing one power switch. The single-switch boost rectifier works in discontinuous inductor current mode with automatic power factor correction. Detailed analysis of the power stages and experimental results using 42-watt electronic ballast are presented.

A reliable and low cost control circuit of electronic ballast for Metal Halide HID lamps

2015 ◽  
Author(s):  
Ammar Rafiq ◽  
Altaf Sameen ◽  
Munshareh Shafaq ◽  
Hina Parveen ◽  
Ahteshamul Haque
Keyword(s):  
Cost Control ◽  
Low Cost ◽  
Control Circuit ◽  
Metal Halide ◽  
Electronic Ballast ◽  
Hid Lamps

A Novel Low-Cost Electronic Ballast for Automotive HID Lamps

2008 ◽  
Author(s):  
Chun-An Cheng ◽  
Kun-Jheng Lin
Keyword(s):  
Low Cost ◽  
Electronic Ballast ◽  
Hid Lamps

scholarly journals An overview on 3D Printed Medicine

2021 ◽  
Vol 18 (1) ◽  
pp. 07-13
Author(s):  
Neha Thakur ◽  
Hari Murthy
Keyword(s):  
3D Printing ◽  
Fused Deposition Modeling ◽  
Low Cost ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Herbal Medicines ◽  
Fused Deposition ◽  
Digitally Controlled ◽  
3D Printed ◽  
Semi Solid

Three-dimensional printing (3DP) is a digitally-controlled additive manufacturing technique used for fast prototyping. This paper reviews various 3D printing techniques like Selective Laser Sintering (SLS), Fused Deposition Modeling, (FDM), Semi-solid extrusion (SSE), Stereolithography (SLA), Thermal Inkjet (TIJ) Printing, and Binder jetting 3D Printing along with their application in the field of medicine. Normal medicines are based on the principle of “one-size-fits-all”. This is not true always, it is possible medicine used for curing one patient is giving some side effects to another. To overcome this drawback “3D Printed medicines” are developed. In this paper, 3D printed medicines forming different Active Pharmaceutical Ingredients (API) are reviewed. Printed medicines are capable of only curing the diseases, not for the diagnosis. Nanomedicines have “theranostic” ability which combines therapeutic and diagnostic. Nanoparticles are used as the drug delivery system (DDS) to damaged cells’ specific locations. By the use of nanomedicine, the fast recovery of the disease is possible. The plant-based nanoparticles are used with herbal medicines which give low-cost and less toxic medication called nanobiomedicine. 4D and 5D printing technology for the medical field are also enlightened in this paper.

scholarly journals Electronic Ventilator for COVID-19 Patient treatment

2020 ◽  
Author(s):  
Mohammad Meraj ◽  
Atif Iqbal ◽  
Nasser MA Emadi ◽  
Prathap Reddy Bhimireddy ◽  
Chowdhary Muhammad Enamul Hoque
Keyword(s):  
Low Cost ◽  
Control Process ◽  
High Rate ◽  
Patient Treatment ◽  
Hospital Nurses ◽  
Semiconductor Switches ◽  
Digitally Controlled ◽  
And Control ◽  
University Laboratory ◽  
Very High

In response to expected shortages of ventilators caused by COVID-19 pandemic, globally many organizations and institutes have developed low cost and high rate production ventilators. Many of these ventilators are mechanical type and pneumatic type which are easy to produce but do not have all the necessary control parameters and their options as per the patient requirements. Furthermore, their failure rate is very high and computer interfacing and control is difficult. To address all the drawbacks of the available ventilator, power electronic motor drive based digitally controlled ventilator is designed, developed and tested in the Qatar University Laboratory. It consists of semiconductor switches based inverter driven by the microcontroller to run the BLDC (brushless direct current) motor. All the parameters such as pressure, rate of flow and volume required is successfully tuned and trained to the microcontroller. As per the patient requirement, it can deliver the required amount of the oxygen into the patient’s body and similarly removes the exhaling air from inside. As all the control process is happening by the microcontroller, all the safety, sound and valves can be easily integrated to reduce the risk for the patient. Minimal number of access control buttons are provided to use the developed ventilator so that it can be easily used by all kinds of hospital nurses.

A Torque-Sensorless Viscometer for Food Processing Applications

2019 ◽  
Vol 888 ◽  
pp. 66-71
Author(s):  
Y. Jiang ◽  
S. Hashimoto ◽  
Y. Yamakoshi ◽  
Takashi Otomo
Keyword(s):  
Nursing Care ◽  
Food Processing ◽  
Low Cost ◽  
Estimation Method ◽  
High Accuracy ◽  
Estimation Accuracy ◽  
Rotational Viscometer ◽  
Food Management ◽  
Digitally Controlled ◽  
Torque Transducer

Our study aims to develop a small handy low-cost viscometer for nursing care food management. There are many methods to measure the viscosity of a fluid. In this research, the rotational viscometer employing the observer-based method instead of the actual torque transducer has been developed. The digitally controlled motor has been used to estimate the viscosity in real time with high accuracy. In order to verify the effectiveness of the developed viscosity estimation method, a prototype viscometer has been constructed and tested the viscosity estimation accuracy with standard liquids. As a result, the viscosity accuracy is equivalent to that of the conventional torque transducer-equipped viscometer.

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