A solid state modulator for driving SLAC 5045 klystrons

Lamare, J.E. de; Cassel, R.; Nguyen, Minh Ngoc; Pappas, G.C.; Donaldson, A.

doi:10.1109/ppps.2001.1001781

Cited by 6 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Proceeding cautiously, the IGBT module and gate drive were assembled and tested first on the Short-Stack Modulator prototype [6]. This modulator setup consists of 11 Metglas cores driven by 11 parallel IGBT modules.…”

Section: Multiple-igbt Test Resultsmentioning

confidence: 99%

Reliability

Short¹

2018

Electric Power Distribution Handbook

View full text Add to dashboard Cite

At SLAC, research and development for the Next Linear Collider (NLC) is progressing. The 8-Pack project is a test stand in which key NLC components will be developed. Presently the setup is such that an Induction Modulator [1] will generate 400kV, 1200A, and 1.6µs flattop pulse to drive four XL4 X-band klystrons. This requires the use of 76 high power IGBT modules operating in parallel at 3600A and up to 2200V each. IGBT switching speeds and short circuit protection from klystron arcs are major concerns. This paper describes a gate drive circuit with a new method to protect IGBT modules under short circuit conditions. Using a dI/dt control technique, the gate drive circuit enabled the Mitsubishi module CM600HB-90H to switch 4000A at speeds up to 10kA/µs in normal operation, while holding the short circuit peak-current to about 8000A. Results from the single IGBT test and the 8-Pack Modulator prototype will be presented.

show abstract

Section: Multiple-igbt Test Resultsmentioning

confidence: 99%

Reliability

Short¹

2018

Electric Power Distribution Handbook

View full text Add to dashboard Cite

show abstract

“…An IGBT gate drive for the SLAC Induction Modulator has been developed and currently installed in two prototypes, the NLC Klystron Modulator and the 5045 Klystron Modulator [5]. While pushing the current generation of high power IGBT modules into new applications that require high currents, high di/dt and short pulse durations, a new type of IGBT failures has been discovered and new gate drive techniques have been devised to control and protect them.…”

Section: Discussionmentioning

confidence: 99%

Gate drive for high-speed high-power I.G.B.T.s

Nguyen¹,

Cassel²,

Delamare³

et al.

IEEE Conference Record - Abstracts. PPPS-2001 Pulsed Power Plasma Science 2001. 28th IEEE International Conference on Plasma Sc

Self Cite

View full text Add to dashboard Cite

A new gate drive for high-voltage, high-power IGBTs has been developed for the SLAC NLC (Next Linear Collider) Solid State Induction Modulator [1]. This paper describes the design and implementation of a driver that allows an IGBT module rated at 800A/3300V to switch up to 3000A at 2200V in 3µS with a rate of current rise of more than 10000A/µS, while still being short circuit protected. Issues regarding fast turn on, high de-saturation voltage detection, and low short circuit peak current will be presented. A novel approach is also used to counter the effect of unequal current sharing between parallel chips inside most high-power IGBT modules. It effectively reduces the collector-emitter peak current, and thus protects the IGBT from being destroyed during soft short circuit conditions at high di/dt.

show abstract

“…Department of Energy contract DE-AC03-76SF515 07803-75408/02/$17.00020M IEEE capacitor, energy recovery diode and capacitor, and a core reset driver (on the master board only) [4]. See Figure 2 for the cell schematic.…”

Section: Solid-state Modulator Designmentioning

confidence: 99%

A hybrid solid-state induction modulator with pulse transformer to drive SLAC klystrons

Lamare

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop.

Self Cite

View full text Add to dashboard Cite

A solid state hybrid induction modulator has been built and tested which can replace the line type modulators currently in use to power SLAC klystrons. The modulator uses twenty-two IGBT modules to drive eleven single turn primary windings of a transformer in parallel. Passing a pipe through the center of the vertically stacked METGLAS cores forms the single turn secondary. One end of the secondary winding is tied to ground, while at the output an induced voltage of eleven times the primary charge voltage is produced. The modulator in turn powers a conventional SLAC high voltage transformer and klystron. The output voltage produced by the "short stack" modulator built at SLAC is 24 kV, with a current of 6000 A. Pulse widths of np to 3 ps, at 120 Hz can he produced.Design details, test data, and comparisons with the conventional line type modulators will be presented.

show abstract

A solid state modulator for driving SLAC 5045 klystrons

Cited by 6 publications

References 4 publications

Reliability

Reliability

Gate drive for high-speed high-power I.G.B.T.s

A hybrid solid-state induction modulator with pulse transformer to drive SLAC klystrons

Contact Info

Product

Resources

About