202-0180B

Trigger Transformers and Chokes Description Features Excelitas has been manufacturing high voltage transformers since 1956. • Peak output voltage up to 40kV • Load current up to 80A RMS • Surface mount, through hole or hardware mounted Standard and custom designs are available with a wide range of input and output voltages. High performance is ensured through state-of-theart manufacturing techniques including vacuum impregnation, vacuum encapsulations, and meter-mix and dispense systems. • Flexible design—easily modified . www.excelitas.com External Trigger Transformers Hold-off Peak Output Primary Voltage Discharge (kV)* Peak MAX Input Pulse Width Primary Voltage 50% Rise Time Sec to Pri Capacitor DC Source Current 10%-90% Amplitude (µfd) (Volts) (A)** (µs)** (µs)** Turns Ratio 0.1 150 50 0.1 0.35 21:1 1.0 250 25 1.0 5.0 15:1 0.1 200 80 0.15 0.35 21:1 Type 5.0 TR-2298*** 6.0 TR-36A TR-2300*** TR-1647 TR-2289 TR-148A TR-2080 TR-1749C TR-2081 TR-132C TR-180B TR-2070 TR-2157 TR-2012 TR-1700 TR-1795 7.0 10.0 12.0 12.0 12.0 15.0 18.0 20.0 20.0 20.0 25.0 25.0 28.0 35.0 40.0 2.0 40 40 1.5 1.2 250:1 0.5 160 90 0.8 1.0 58:1 0.5 400 120 0.35 0.5 30:1 0.5 150 60 0.5 1.0 65:1 0.5 250 120 0.7 0.7 80:1 1.0 200 140 1.0 2.5 155:1 0.5 400 60 2.25 2.5 70:1 1.0 200 110 1.0 1.5 112:1 0.5 240 76 1.5 1.2 220:1 0.5 350 60 1.2 1.5 73:1 0.5 300 90 2.0 5.0 163:1 0.5 400 70 0.75 1.5 70:1 0.22 600 96 0.5 0.5 51:1 2.0 300 90 5.0 5.0 121:1 TR-1855 *Open circuit, unloaded secondary. (kVdc) Length (inches) Width (inches) Height (inches) Diameter (inches) 4.0 0.35 0.41 0.34 — 0.5 — — 0.69 1.06 4.0 0.35 0.41 0.35 — 1.0 — — 1.00 1.25 4.0 — — 0.78 1.03 2.0 — — 1.93 1.25 2.0 — — 1.00 0.94 0 — — 1.25 .625 5.0 — — 1.75 1.25 0 — — 1.06 1.75 5.0 — — 1.50 1.00 0 — — 1.50 0.75 5.0 — — 2.25 1.25 1.5 — — 2.06 1.75 20.0 3.63 2.13 2.00 15.0 3.06 3.63 7.00 — — — 2.06 1.75 5.0 **Measured at maximum voltage input, with primary discharge capacitor listed. — ***Surface mount. Series Trigger Transformers Hold-off Peak Pulse Peak Turns Voltage Output Rise Time Width 50% MAX Input Primary Ratio Secondary Saturated Winding MAX Voltage 10%-90% Amplitude DC Source Current Secondary to Primary Inductance Resistance Current Length Width Height (kV)* (µs)** (µs)** (Volts) (A)** to Primary (kVdc) µH sat ohms RMS (A) (inches) (inches) (inches) TS-2174 10 0.4 0.3 400 60 38:1 2 80 1.0 0.4 1.2 1.0 0.8 TS-1987 10 0.5 0.3 600 215 19:1 5 70 0.5 0.1 — 1.0 1.3 TS-1952 10 0.6 0.2 400 300 40:1 5 36 0.1 1 — 1.5 1.0 TS-2028 13 0.5 0.5 500 120 40:1 5 35 0.03 16 2.4 2.3 1.9 TS-179 15 0.4 0.7 800 100 25:1 5 80 0.05 12 2.8 2.1 2.5 TS-2295 18 0.8 1.0 500 170 29:1 20 350 0.22 18 3.5 2.8 3.56 TS-170 20 0.2 0.5 2000 150 10:1 5 18 0.05 20 2.8 2.3 2.5 TS-146B 22 0.5 1.3 1000 850 30:1 30 73 0.015 35 4.0 3.5 6.0 TS-146A 27 0.5 0.5 1500 660 30:1 30 110 0.033 25 4.0 3.5 6.5 TS-185 30 0.5 1.0 600 60 50:1 15 550 0.3 15 3.3 2.8 3.8 TS-136B 40 0.65 2.15 1500 1100 30:1 30 110 0.02 80 7.5 5.0 5.75 Type *Open circuit, unloaded secondary. **Measured at maximum voltage input, with primary discharge capacitor listed. Chokes MAX Peak DC Type Inductance Current 1 MAX RMS Resistance Voltage ms Pulse Current Length Width Height (ohms) (kV) (amp) (amp) (inches) (inches) (inches) TC-2136 50 0.03 5 2000 25 2.6 3.5 4.3 TC-1848 200 0.12 5 300 8 — 2.4 1.8 TC-70 300 0.19 5 2000 8 3.5 2.6 4.75 TC-71 600 0.25 5 2000 8 3.8 2.6 4.75 TC-198 775 0.27 2.5 1000 4 4.0 2.6 4.75 External Triggering External triggering uses a high voltage trigger pulse to create a thin ionized External Triggering streamer between the anode and cathode within the lamp. The coupling of this CT R FLASHLAMP ANODE voltage to the lamp may be accomplished VT iT using a thin nickel wire wrapped around the surface of the lamp envelope as shown. Other techniques used to couple CAPACITOR CHARGING POWER SUPPLY SCR TRIGGER POWER SUPPLY C GATE external trigger transformers are reviewed in the technical paper “Design TRIGGER TRANSFORMER Considerations for Triggering of Flashlamps”. Series Injection Triggering Series injection triggering differs from Series Triggering external triggering in that the discharge CATHODE R current from the energy storage capacitor CT Excelitas FLASHLAMP VT passes through the secondary winding of the trigger transformer. The secondary winding of the transformer must therefore be designed to carry the total current of CAPACITOR CHARGING POWER SUPPLY SCR C TRIGGER POWER SUPPLY GATE iT the discharge. This type of trigger transformer is consequently larger, heavier and TRIGGER TRANSFORMER more expensive than the external trigger transformer. The inductance of the secondary winding (of the trigger transformer) is part of the discharge circuit and may be Typical Mini-Trigger Spark Gap utilized to control the energy storage + OE capacitor’s current pulse wave shape. A GAP CT typical series injection circuit is shown. AE T V T(IN) Additional series injection trigger circuit configurations are discussed in the technical paper “Design Considerations for Triggering of Flashlamps”. TR-2300 CVR 2.4-3.5 KV Trigger Transformers and Chokes Outline Drawings or Specification Charts E = 1/2 CV2 where: E C V = Discharge energy (joules) = Capacitance (microfarads) = Discharge voltage (kilovolts) PAVG = EF PAVG = Average power (watts) E = Discharge energy (joules) F = Flash rate (pulses per second) IPK = V(C/L)½ IPK L = Peak discharge current (keep below 1000 amps) = Circuit inductance (use 0.5µH for best approximation) t1/3 = π (LC)½ t1/3 = Pulse width at 1/3 peak. Note: Peak currents should be kept below 1000 amps. Exceeding this limit could cause envelope fracture, excessive electrode wear and premature darkening. Caution Some glass flashlamps are under high internal pressure, and, if broken, could result in glass particles being blown into the face and hand areas. To prevent injury, wear suitable protective devices such as safety glasses and/or face mask and gloves. Some types of pulsed lamps generate intense ultraviolet radiation which, if not properly shielded from personnel in the area, will cause burns to any exposed skin and especially to the eyes. Do not expose any skin area or the eyes to the direct or reflected radiation of an operating lamp. If you have to view an operating lamp, always use protective covering for exposed skin area and ultraviolet-attenuating goggles for the eyes. For more information email us at generalinquiries@excelitas.com or visit our web site at www.excelitas.com Note: All specifications subject to change without notice. USA: Excelitas Technologies 35 Congress Street Salem, MA 01970 Toll Free: (800) 950-3441 (USA) . Phone: (978) 745-3200 Fax: (978) 745-0894 © 2011 Excelitas Technologies Corp. All rights reserved. 06/01 www.excelitas.com