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thyristors

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Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005836
EISBN: 978-1-62708-167-2
... direction and infinite resistance in the other Fig. 7 Graph plotting blocking characteristic and high conduction characteristic of a diode Fig. 8 Schematic of a thyristor, showing four layers of alternating N and P-type material Fig. 9 Switching characteristics...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004118
EISBN: 978-1-62708-184-9
... of this problem is shown in Fig. 6 . During normal operations, the capacitor blocks up to 12 V dc. If the voltage goes higher than 12 V, the gate circuit will turn on one of the two thyristors depending on polarity, dc current will begin to flow, and cathodic isolation will be interrupted until the voltage...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005899
EISBN: 978-1-62708-167-2
... constant. Refilling and sludge removal likewise run automatically. Using transistors as power semiconductors in converters instead of thyristors leads to changes in the cooling water system. In contrast to thyristors, the cooling elements for transistors are free of voltage, so that larger tolerances...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006466
EISBN: 978-1-62708-190-0
... performance may be affected; that is, a connection may break, or an electrical characteristic may change. Integrated circuits, ceramic capacitors, and thyristors that contain defects of this type are examined in this section. Integrated Circuits (ICs) Example 3: Use of SAM to Evaluate an IC on a Silicon...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001356
EISBN: 978-1-62708-173-3
... waveforms of two power sources to show relative response times of each source. (a) Thyristor-controlled source. (b) Inverter-controlled source. Faster response of inverter-controlled arc welding machine (2 ms to go from 0 to 100 A) indicates a more stable arc. Fig. 8 Schematic showing key...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005590
EISBN: 978-1-62708-174-0
... supply Fig. 13 Current profiles with (a) thyristor-controlled and (b) inverter-controlled welding machines Fig. 14 Effect of alternating current (ac) waveform on weld profile. (a) Effect of altering balance. (b) Effect of altering frequency (with balanced square wave) Fig. 15...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001337
EISBN: 978-1-62708-173-3
... frequency ( Fig. 3c ). A square wave eliminates peaking and provides a rapid transition through zero, which is important to cyclic reignition of the arc. Thyristors are employed in concert with magnetic cores to generate the square current waveform. Adjustable imbalance permits the operator to control...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001363
EISBN: 978-1-62708-173-3
... of transformer and thyristor water cooling circuits. Separate water circuits should be used for both top and bottom electrodes. Low-carbon steel can be satisfactorily resistance spot welded using a wide range of time, current, and electrode force parameters. Practices recommended for spot welding SAW 1010...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003980
EISBN: 978-1-62708-185-6
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003173
EISBN: 978-1-62708-199-3
... range. Thyristors in the rectifier lower the dc voltage and provide half cycle protection. Parallel systems are most widely used. Furnace linings may be acid (silica-base), neutral (alumina-base), or basic (magnesia-base), depending on the alloy being melted. Silica is usually used for ferrous heats...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005838
EISBN: 978-1-62708-167-2
.... Courtesy of Radyne Corporation Silicon-controlled rectifiers (SCRs) ( Fig. 5 ) have long been a staple for induction heating, and perform reliably in well-designed systems. Voltages on gate-commutated thyristors (GCTs), which are variants of SCRs, are nearing 6000 V root mean square (rms) and 4000...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005895
EISBN: 978-1-62708-167-2
... of the static frequency converter, which, after the introduction of thyristor technology, was successful from a number of aspects: The efficiency of frequency conversion was raised from 60 to 80% at that time to approximately 97 to 98%. At the same time, high operational reliability and availability were...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005195
EISBN: 978-1-62708-187-0
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005594
EISBN: 978-1-62708-174-0
... the values given in the appropriate ISO or RWMA standard. The inlet water temperature should not exceed 20 °C (70 °F), and the outlet temperature should not exceed 30 °C (85 °F). To maintain these temperature levels, the electrode cooling water supply should be independent of transformer and thyristor water...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001247
EISBN: 978-1-62708-170-2
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006644
EISBN: 978-1-62708-213-6
... from a 6H-SiC single crystal with thyristors fabricated on it. The small white spots distributed over the image are 1 c and larger screw dislocations. The location of these dislocations with respect to the device topology can be clearly discerned, enabling the influence of the defects on device...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005924
EISBN: 978-1-62708-166-5
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005977
EISBN: 978-1-62708-168-9
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003206
EISBN: 978-1-62708-199-3
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003206
EISBN: 978-1-62708-199-3