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constant-voltage power sources

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220047
EISBN: 978-1-62708-341-6
... Tap switch used in adjusting voltage on the primary of a line-frequency induction heating system Source: American Induction Heating Corp. Fig. 4.6 Capacitor bank for a 3-MW line-frequency power supply; capacitors are located in a chamber beneath the induction coils Source: American...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290023
EISBN: 978-1-62708-306-5
... FCAW equipment is not substantially different from that used in the semiautomatic FCAW process. Fig. 2.5 Semiautomatic flux cored arc welding equipment. Source: Ref 2.3 The recommended power supply for the semiautomatic FCAW process is a constant-voltage dc machine. Most power supplies...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110196
EISBN: 978-1-62708-247-1
..., and to a lesser extent, polysilicon elements and highly doped substrate areas. The laser modifies the electrical properties of the heated medium, namely its resistivity. This change of resistivity alters the current when using a constant voltage source, or the voltage when using a constant current source...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220027
EISBN: 978-1-62708-341-6
... at the power source as close to unity as possible. The power factor may also be defined as the cosine of the phase angle between the current and voltage in an electrical circuit. For a tuned series circuit containing an inductor, a capacitor, and a resistor, which appears to consist of a pure resistance...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050025
EISBN: 978-1-62708-311-9
... power supply basic diagram. ac: alternating current; dc: direct current. Source: Ref 2 Solid-State Power Supplies Solid-state power supplies convert the line alternating voltage (ac) to produce single-phase, direct-current (dc) voltage. Inversion is then accomplished through use...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900089
EISBN: 978-1-62708-350-8
... of the port is usually about 15 times faster. Why pulse the power input? With a constant voltage input, there is a constant heat output. Reducing voltages to reduce temperature changes the current density and the cathode fall voltage distance (glow seam); therefore, other parameters also must be changed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110613
EISBN: 978-1-62708-247-1
... supply signature analysis. MOSFET Operation and Three Bias States Figure 1 shows an n -channel transistor cross-section with heavily n + doped drain and source regions and a p -well. When the gate voltage ( V G ) is zero and the source and drain are grounded, only a few thermally...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780164
EISBN: 978-1-62708-281-5
...–4.5 Source: Ref 1 The comprehensive test method for determining dielectric constant, dissipation factor, loss index, power factor, phase angle, and loss angle of solid electrical insulating materials developed and published by ASTM Committee D-9 is ASTM D 150 ( Ref 5 ). This standard test...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220077
EISBN: 978-1-62708-341-6
... into the cooler, and the tap water becomes similar to distilled water. Typical cooling-water specification for an induction heating power supply Table 5.1 Typical cooling-water specification for an induction heating power supply Source: American Induction Heating Corp. Minimum pressure...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900071
EISBN: 978-1-62708-350-8
.... On leaving the room, the light is switched off. The peak voltage from the power source is constant, but the duration of the power to the light is variable. Pulsed dc power supplies have the ability to switch the power on and off as required by component geometry. The pulsed dc peak voltage can be varied...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110279
EISBN: 978-1-62708-247-1
.... With better control over the gate, less voltage is required to turn on the device resulting in improved power efficiency compared to a planar device structure [3] . Industry adopted FinFET MOS structures start at approximately Sub-20nm process nodes. In FinFET structures, charge carriers travel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050263
EISBN: 978-1-62708-311-9
... of the incoming line voltage. The utilities are commonly allowed plus or minus 10% on a 480 V supply. The manufacturers of power supplies design the power supplies to be able to produce constant output power over some variation in line voltage. The common type of output regulation is constant power, constant...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220009
EISBN: 978-1-62708-341-6
... for determination of power requirements for a given application. eddy-current distribution induction heating induction-coil resistance power requirements An induction heating system consists of a source of alternating current (ac), an induction coil, and the workpiece to be heated. The basic phenomena...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220143
EISBN: 978-1-62708-341-6
...) and potential (PT) transformers to obtain induction heating “signatures” for systems utilizing (a) a constant-current (solid-state) power supply and (b) a constant-voltage (motor-generator) power supply. From G. Mordwinkin, A. L. Vaughn, and P. Hassell, Heat Treating, Vol 18, No. 11, November, 1986, p 34 ( Ref...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2023
DOI: 10.31399/asm.tb.edfatr.t56090091
EISBN: 978-1-62708-462-8
... PowerVia) first appearing at their 2 nm node, designated as 20A. Source: https://www.intel.com/content/www/us/en/silicon-innovations/6-pillars/process.html Fig. 2 (a) Flip-chip versus (b) buried power rail (BPR) with backside power delivery (BPD) architecture. Blockage on both sides...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110180
EISBN: 978-1-62708-247-1
... signal intensity on supply voltage is problematic with low power technologies, but a shift of the detected spectrum further into the IR may solve this problem. Fundamental Mechanism Electronic Material Properties and Light Emission Electronic devices can emit light correlated to electronic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050001
EISBN: 978-1-62708-311-9
... that tapped the plate transformer for different output voltages. The power was turned on and off through the use of a main solenoid-activated contactor. Cycle times were controlled through use of a mechanical, cam-driven timer. The output was the high voltage obtained directly from the tank voltage, and low...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110228
EISBN: 978-1-62708-247-1
... the pass/fail boundary, and then start the test loop. To precisely choose the 50% fail rate, the bias must be adjusted while monitoring the fail rate during the test loop. Most testers allow the power supply voltage to be changed while running a test pattern in a loop. Timing changes may not be possible...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140201
EISBN: 978-1-62708-264-8
.... It produces a small direct current voltage that can be detected with a high-impedance voltmeter (similar to a digital voltmeter) connected to the wire ends opposite the weld bead. For the configuration in Fig. A1 , a voltage will be registered on the voltmeter if the temperature of the weld bead (called T...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2024
DOI: 10.31399/asm.tb.phtpp.t59380085
EISBN: 978-1-62708-456-7
... produced by laser surface melting and alloying can exhibit improved electrochemical behavior. Fig. 5.8 Interaction times and power densities necessary for various laser surface modification processes. Source: Ref 4 Laser transformation hardening produces thin surface zones that are rapidly...