Electromagnetic induction heating of an orthopaedic nickel-titanium shape memory device

2010 ◽  
Vol 28 (12) ◽  
pp. 1671-1676 ◽  
Author(s):  
Christian W. Müller ◽  
Ronny Pfeifer ◽  
Tarek El-Kashef ◽  
Christof Hurschler ◽  
Dirk Herzog ◽  
...  
Keyword(s):  
Shape Memory ◽  
Induction Heating ◽  
Electromagnetic Induction ◽  
Memory Device ◽  
Nickel Titanium ◽  
Electromagnetic Induction Heating

Transcutaneous electromagnetic induction heating of an intramedullary nickel–titanium shape memory implant

2014 ◽  
Vol 38 (12) ◽  
pp. 2551-2557 ◽  
Author(s):  
Christian W. Müller ◽  
Tarek ElKashef ◽  
Ronny Pfeifer ◽  
Sebastian Decker ◽  
Claudia Neunaber ◽  
...  
Keyword(s):  
Shape Memory ◽  
Induction Heating ◽  
Electromagnetic Induction ◽  
Nickel Titanium ◽  
Electromagnetic Induction Heating

scholarly journals A Novel Shape Memory Plate Osteosynthesis for Noninvasive Modulation of Fixation Stiffness in a Rabbit Tibia Osteotomy Model

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Christian W. Müller ◽  
Ronny Pfeifer ◽  
Karen Meier ◽  
Sebastian Decker ◽  
Janin Reifenrath ◽  
...  
Keyword(s):  
Shape Memory ◽  
Induction Heating ◽  
Electromagnetic Induction ◽  
Plate Osteosynthesis ◽  
Bending Stiffness ◽  
Niti Sma ◽  
Additional Surgery ◽  
Rabbit Tibia ◽  
Electromagnetic Induction Heating

Nickel-titanium shape memory alloy (NiTi-SMA) implants might allow modulating fracture healing, changing their stiffness through alteration of both elastic modulus and cross-sectional shape by employing the shape memory effect (SME). Hypotheses: a novel NiTi-SMA plate stabilizes tibia osteotomies in rabbits. After noninvasive electromagnetic induction heating the alloy exhibits the SME and the plate changes towards higher stiffness (inverse dynamization) resulting in increased fixation stiffness and equal or better bony healing. In 14 rabbits, 1.0 mm tibia osteotomies were fixed with our experimental plate. Animals were randomised for control or induction heating at three weeks postoperatively. Repetitive X-ray imaging and in vivo measurements of bending stiffness were performed. After sacrifice at 8 weeks, macroscopic evaluation,µCT, and post mortem bending tests of the tibiae were carried out. One death and one early implant dislocation occurred. Following electromagnetic induction heating, radiographic and macroscopic changes of the implant proved successful SME activation. All osteotomies healed. In the treatment group, bending stiffness increased over time. Differences between groups were not significant. In conclusion, we demonstrated successful healing of rabbit tibia osteotomies using our novel NiTi-SMA plate. We demonstrated shape-changing SME in-vivo through transcutaneous electromagnetic induction heating. Thus, future orthopaedic implants could be modified without additional surgery.

Dimensionamiento de un horno de fundición por inducción electromagnética y cálculo de los parámetros eléctricos

2019 ◽  
pp. 1-15
Author(s):  
Arnulfo Pérez-Pérez ◽  
Jorge Sergio Téllez-Martínez ◽  
Gregorio Hortelano-Capetillo ◽  
Jesús Israel Barraza-Fierro
Keyword(s):  
Induction Heating ◽  
Power Supply ◽  
Electromagnetic Induction ◽  
Cast Steel ◽  
Electrical Power ◽  
Heating System ◽  
Heating Time ◽  
Ferrous Alloys ◽  
Electromagnetic Induction Heating ◽  
Induction Heating System

In this work, the dimensions of a furnace for melting of ferrous alloys were determined. The furnace has an electromagnetic induction heating system. In addition, the parameters of electrical power supply such as frequency and power were calculated. A 5kg cast steel mass with a density of 7.81 kg / dm3 was proposed. This corresponds to a crucible volume of 0.641 dm3. The frequency was obtained from tables, which take into account the diameter of the crucible, and its value was 1 KHz. The energy consumption was determined with the heat required to bring the steel to the temperature of 1740 K, the energy losses through the walls, bottom and top of the crucible. This value was divided between the heating time (30 minutes) and resulted in a power of 4.5 KW. The development of the calculations shows that the induction heating is an efficient process and allows a fast melting of ferrous alloys.

Direct silicon-silicon bonding by electromagnetic induction heating

2002 ◽  
Vol 11 (4) ◽  
pp. 285-292 ◽  
Author(s):  
K. Thompson ◽  
Y.B. Gianchandani ◽  
J. Booske ◽  
R.F. Cooper
Keyword(s):  
Induction Heating ◽  
Electromagnetic Induction ◽  
Electromagnetic Induction Heating ◽  
Silicon Silicon

scholarly journals Construcción y control de un puente H a partir de MOSFETS para utilizarlo como inversor en el calentamiento por inducción

2020 ◽  
pp. 8-13
Author(s):  
Arnulfo PÉREZ-PÉREZ ◽  
José Merced MARTÍNEZ-VÁZQUEZ ◽  
José Miguel MORENO-REYES ◽  
Oscar Enrique GARCIA-DUARTE
Keyword(s):  
Pulse Rate ◽  
Induction Heating ◽  
Integrated Circuit ◽  
Electromagnetic Induction ◽  
Pulse Generation ◽  
Load Frequency ◽  
Steel Bar ◽  
Electromagnetic Induction Heating

In this work, an H bridge was built and controlled to be used as a frequency variator in electromagnetic induction heating. Due different frequency values are required for this process depending on its diameter, it is necessary to adjust the pulse rate for each specific case. The H bridge was built using the N type MOSFET, model IRF640. Its driving capacity is 18 Ampere and it can operate at 200V. For its operation, the integrated circuit IR2110 was used, which can operate a MOSFETS or IGBTs bridge that works up to 500V. Pulse generation was performed with the Arduino board. As a result, a load frequency of 5 KHz was achieved, which is sufficient for use in induction heating of an inch diameter steel bar.

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