The second switch driver 138 is coupled to the discharge feedback circuit 132 in the power converter 110. Ignition Product Support Attn:Ignition Help 7575 Baymeadows Way Jacksonville, FL 32256 Phone : (904) 739-4244 Fax : (904) 739-4006. In one aspect, an embodiment of the invention relates an ignition exciter system for igniting fuel in a gas turbine engine. The fan casing 38 is supported about the core engine section 12 by a plurality of substantially radially-extending, circumferentially-spaced support struts 40. International Classes: F02C7/266; H01T15/00. MEANS oF ExTINcTIoN: Foam, dry chemical, Co 2 or sand. The common mode voltage applied to the anode to gate nodes may be less than 20 volts, as compared to more traditional silicon thyristor circuits that have greater than 2500 volts applied to trigger the gate to cathode nodes. To electrically protect the silicon carbide thyristors 218, the clamp diode 227 provides a current path for oscillating current that could flow backward in the exciter circuit during the energy delivery, thus allowing high current flow into the gate of the silicon carbide thyristor 218 and out of the cathode of the silicon carbide thyristor 218. Ignition exciters may endure temperature extremes ranging from −55° C. to 150° C. Exposure to high temperatures (e.g. The clamper circuit 220 includes a freewheeling diode 222. An ignition exciter system for igniting fuel in a gas turbine engine. Privacy Policy • Solid State switching provides consistent delivered energy for dependable starts The EMI filter module 108 is configured to receive a supply of relatively low, direct current (DC) voltage, for example, 28 volts DC from a DC source 117. Unison developed this product to meet the needs of the industry from our original domain knowledge as the OEM. The engine ignition system may include an ignition exciter that stores energy and releases a high-energy spark to produce combustion of fuel in the engine in a way that is analogous to automobile ignition coils. We build high tension and low tension turbine igniters for aircraft main propulsion engines, auxiliary power units and a wide range of turbine engines for industrial applications. ● DDTC Registered Dept. Unison’s unique high temperature designs have allowed customers to achieve their efficiency goals while increasing reliability. PRoDucT NAME: Prentox® ExciteR ... Keep containers cool to avoid explosive ignition. View Patent Images: Download PDF 20150260107 . tion chamber. ● MELBOURNE, FLORIDA 32935 USA The only independent distributor We will continue to share our latest technology development, recent news and provide an overall update for our partners. Please click the Read More + button below for the Newsletter PDF. For years, Unison has been disrupting the Thermal heat exchanger market with its conformal heat exchanger. The high energy combustion products flow to a first turbine 26 for use in driving the compressor 22 through a first drive shaft 28, and then to a second turbine 30 for use in driving the booster 20 through a second drive shaft 32 that is coaxial with the first drive shaft 28. Unison's patented technology improves spark life under harsh conditions to maximize performance, resulting in longer time-on-wing, and improved mechanical retention with the same form, fit, function, waveform, and efficiency. © 2004-2020 FreePatentsOnline.com. Unison exciters are available for Industrial, L&M, Aerospace and main propulsion or APU engines. Likewise, gas turbine engines may power industrial machinery for a wide range of applications. 1 and described above in the context of a commercial jet engine, the engine ignition system described herein is equally applicable to industrial turbine-powered applications without loss of generality. metal object. Consequently, silicon carbide thyristors may be used for ignition exciters designed for ignition systems with high spark energy requirements. 2 is a schematic block diagram of an engine ignition system with an ignition exciter charging according to an embodiment of the present invention. Unison's tube and duct design, integration, and manufacturing solutions for fluid conveyance requirements meet a wide range of engine needs. ëλñtÉV+•ÿŠ¯Ë|S¾¿Ãc–ÿ˜û0ã»zø½Ù?ª|ÿ1MÃ9Œ‹*Ôz­úpŠ};Lßç rI{Úõñù°Ü�bÎ=âí6eä^ÓLwéÃu:ta>Œï! Each PFN 116A-B may be an inductor but may also include a transformer and/or a high frequency capacitor to facilitate a higher output voltage or a longer duration for the resulting spark. Gas turbine engines for aircraft typically include an ignition system to aid in the starting of the engine. Use extreme care. Unison meets your more specialized requirements with products like magnesium oxide leads that can withstand temperatures up to 1200 F. Unison PMGs are highly reliable backup power generators that lead the industry in quality and reliability. • Decreases plug replacement maintenance intervals by 50%  The power converter 110 utilizes a charge pump technique to build up the voltage at the rechargeable energy source 112 over a number of charge cycles. While shown in FIG. The agreement extends through 2023 and covers both new Unison LRUs as well as external engine component repairs. Looking for Ignition Exciter? AIRPORT These sensors are increasingly asked to work in harsher environments. 3 is a circuit diagram illustrating the silicon carbide discharge switch 140 and the rechargeable energy source 112 of the ignition exciter circuit 102. 1399 GENERAL AVIATION DRIVE 1 is a schematic view of an exemplary gas turbine engine 10 that includes a core engine section 12 positioned axially downstream from a fan section 14 along a longitudinal axis 15. Whereas a silicon thyristor requires extensive voltage isolation around the pulse transformer 216, grounding the anode of the silicon carbide thyristor 218 removes the requirement for high voltage isolation of an anode-gate trigger circuit. The phenomenon increases with temperature. possibly fatal voltage. For silicon semiconductors, the level of leakage current becomes excessive at about 121° C. and above. The technical effect is to maintain the spark rate during higher temperature operation where the leakage current of the solid-state switch increases with temperature. A second clamper circuit comprising a freewheeling diode 230 in parallel with resistor 228 is coupled in parallel to the gate and anode of the silicon carbide thyristor 218. Unison Industries CEO Tom Hoferer and Vice President Brian DeGennaro visited Embry-Riddle Aeronautical University yesterday to announce our partnership of the MicaPlex, the cornerstone facility of Embry-Riddle’s Research Park, and a new Aviation Awareness Certificate program intended to expand the talent pool of highly skilled aviation and aerospace professionals. The voltage monitoring circuit and discharge switch module 114 includes a second switch driver 138 electrically coupled to a silicon carbide discharge switch 140, a voltage comparator 142, a rectifier and a trigger capacitor module 144. Unison exciters are available for Industrial, L&M, Aerospace and main propulsion or APU engines.

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