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Dépannage du gysmi 130HF
Dépannage du gysmi 130HF

Maxstar 150 S, STL, And STH
Maxstar 150 S, STL, And STH

... drums, or pipes, can cause them to blow up. Sparks can fly off from the welding arc. The flying sparks, hot workpiece, and hot equipment can cause fires and burns. Accidental contact of electrode to metal objects can cause sparks, explosion, overheating, or fire. Check and be sure the area is safe b ...
INVERTER ARC WELDER
INVERTER ARC WELDER

... To prevent possible injury, read, understand and follow all warnings, safety precautions and instructions before using the equipment. Call 1800-462-2782 or your local distributor if you have any questions. ...
LOW VALUE CAPACITANCE MEASUREMENT
LOW VALUE CAPACITANCE MEASUREMENT

... proposed. The researchers developed a low power consumption capacitance measuring circuit that computes very low capacitance with high resolution and high level of linearity. The application of such capacitance measurement technique could be in bio medical sectors. The differential arrangement of th ...
Aalborg Universitet Converters
Aalborg Universitet Converters

... The dc-link capacitor current strongly depends on the modulation index M, the displacement power factor angle, and the PWM scheme used. The effect of these factors on the dc-link capacitor current are analyzed in this section. A. The Effect of the Modulation Index and the Reference Space Vector Angl ...
Presentation (englis..
Presentation (englis..

... – Long time operation at 150% modulation ...
Oil Rig Leg Brake, 1992-2001 Design
Oil Rig Leg Brake, 1992-2001 Design

... and b in reverse order. Do not tighten pressure spring nut, but snug the two set screws (17S) of eccentric sleeve (17E) with hole in line with set screws. Upon completion of installation of new lever arm it will be necessary to check and/or adjust the backlash between the rack and pinion. a) The bac ...
Datasheet - Allied Electronics
Datasheet - Allied Electronics

... Then input pin voltage is set to more than VSS. (Note 6) An excessive input current will flow when input voltages of more than VDD+0.6V or less than VSS-0.6V are applied. The input current can be set to less than the rated current by adding a limiting resistor. Caution: Operating the IC over the abs ...
Construction, Modeling and Evaluation of a Low Loss Motor
Construction, Modeling and Evaluation of a Low Loss Motor

electrical machines ii - SK Engineering Academy
electrical machines ii - SK Engineering Academy

DRAFT SOUTH AFRICAN STANDARD (DSS): PUBLIC ENQUIRY STAGE Document number
DRAFT SOUTH AFRICAN STANDARD (DSS): PUBLIC ENQUIRY STAGE Document number

... 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electric ...
BDTIC CoolSET -F3 ICE3A2065ELJ
BDTIC CoolSET -F3 ICE3A2065ELJ

... Therefore the maximum power is nearly independent on the input voltage which is required for wide range SMPS. There is no need for an extra over-sizing of the SMPS, e.g. the transformer or the secondary diode. Furthermore, this ELJ version implements the frequency jitter mode to the switching clock ...
BDTIC CoolSET -F3 ICE3A1065ELJ
BDTIC CoolSET -F3 ICE3A1065ELJ

... Therefore the maximum power is nearly independent on the input voltage which is required for wide range SMPS. There is no need for an extra over-sizing of the SMPS, e.g. the transformer or the secondary diode. Furthermore, this ELJ version implements the frequency jitter mode to the switching clock ...
High Voltage SIL/SIP Reed Relays
High Voltage SIL/SIP Reed Relays

... One or two Form A (energize to make) or one Form B (energize to break) configurations are available. The range features an internal mu-metal screen to eliminate problems that would otherwise be experienced due to magnetic interaction when they are closely stacked. Three types of dry switches are ava ...
Design of a Zero voltage switching Flyback synchronous rectification controller for high
Design of a Zero voltage switching Flyback synchronous rectification controller for high

SP3220EU 数据资料DataSheet下载
SP3220EU 数据资料DataSheet下载

BDTIC
BDTIC

BD91364AMUU
BD91364AMUU

... BD91364AMUU has a ripple implanted system at output detection which keeps a normal switching operation even if a low ESR output capacitor is used. This feature also resolved a weakness of a regular hysteresis control, which is, to keep a steady frequency from a variation of frequencies. When operati ...
The 555 Timer IC
The 555 Timer IC

... When the trigger input is connected 0 momentarily, the capacitor starts charging towards VCC with a time constant of = RAC (Fig. 8.5). The output is switched to VCC then. The charging is stopped when vC voltage reaches 2VCC/3. The output pulse duration is determined as T = (ln3)RAC = 1.1RAC Recove ...
IH3214741491
IH3214741491

... Electronic systems operate properly as long as the supply voltage stays within a consistent range. There are several types of voltage fluctuations that can cause the systems to malfunction, including surges and spikes, sags, harmonic distortions, and momentary disruptions. Among them, voltage sag is ...
Design Of A Current Controlled Defibrillator
Design Of A Current Controlled Defibrillator

... high voltages (around 2 kV ). This energy is applied across the patients heart as described in the previous section. Depending of how the discharge of the capacitor is done, different types of defibrillation are achieved: • Monophasic defibrillation - the current never changes directions during disc ...
Digital Trip Coil Supervision Relay
Digital Trip Coil Supervision Relay

... Note: The activation of a NO (Normally Open) output means contacts will be closed, whereas the activation of a NC (Normally Closed) output means contacts will be opened. In its single-coil version, the DBT monitors coil continuity whether the breaker is open or closed. It also has a timing device to ...
Mehedi Hasan Tusher
Mehedi Hasan Tusher

UCC28019A 数据资料 dataSheet 下载
UCC28019A 数据资料 dataSheet 下载

... VCC exceeds a turn-on threshold of 10.5 V. Operation continues until VCC falls below the turn-off (UVLO) threshold of 9.5 V. A ceramic by-pass capacitor of 0.1 µF minimum value must be connected from VCC to GND as close to the device as possible for high frequency filtering of the VCC voltage. ...
UCC28230 数据资料 dataSheet 下载
UCC28230 数据资料 dataSheet 下载

... optimized for use in high efficiency, high power density, unregulated intermediate bus converters. Topologies include push-pull, half-bridge and full-bridge. External drivers, such as the UCC27200 120-V high-side/low-side drivers, can be used with this controller. Low cost, small size and highly eff ...
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Spark-gap transmitter



A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""
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