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Piratas Del - Caribe 1 La Maldicion Del Perla Negra

     Welding inverter is an alternative to a conventional welding transformer. Modern semiconductors allow to replace the traditional mains transformer with a switching power supply, which is much lighter, smaller and allows easy current adjustment via a potentiometer. The advantege is also that the output current is DC. DC current is less dangerous than AC and prevents arc extinction.

     For this inverter i chose topology, which is the most common in welding inverters - forward converter with two switches. In my article about switchning supplies it is a topology II.D. Input mains voltage passes through an EMI filter and is smoothed with high capacity capacitors. Since the inrush current of those capacitors would be too high, there's a softstart circuit. After switching ON, the primary smoothing capacitors are charging via resistors, which are later bypassed by the contact of a relay. As power switches, IGBT transistors IRG4PC40W are used. They are driven through a forward gate-drive transformer TR2 and shaping circuits with BC327 PNP transistors. The control integrated circuit is UC3844. It's similar to UC3842, but it has its pulse-width limited to 50%. Working frequency is 42kHz. Control circuit is powered by an auxiliary power supply of 17V. Current feedback, due to high currents, is using a current transformer Tr3. Voltage drop accros the sensing resistor 4R7/2W is approximately proportional to the output current. Output current can be controlled by potentiometer P1, which determines the threshold of the current feedback. Threshold voltage of the pin 3 of UC3844 (current sensing) is 1V.

     Power semiconductors require cooling. Most of the heat is dissipated in output diodes. Upper diode, consisting of 2x DSEI60-06A, must in worst case handle the average current of 50A and the dissipation of 80W (total of both diodes). Lower diode STTH200L06TV1 (doube diode package with both internal diodes connected in parallel) must in worst case handle an average current of 100A and the dissipation of nearly 120W. Maximum total dissipation of the secondary rectifier is 140W. The heatsink must be able to handle it. To the thermal resistance you must include the junction-case Rth, case-sink Rth and sink-ambient Rth. DSEI60-06A diodes don't have insulation pads and the cathode is connected to the the heatsink. Output choke L1 is therefore in the negative rail. It is advantageous because in this configuration, there's no high-frequency voltage on the heatsink. You can use another type of diodes, for example a parallel combination of a sufficient number of the most accessible diodes, such as MUR1560 or FES16JT. Note that the maximum average current of the lower diode is twice the current of the upper diode. Calculation of the power dissipation of the IGBTs is more complicated because in addition to conductive losses there are also switching losses. Loss of each transistor is up to about 50W. It is also necessary to cool the reset diodes UG5JT and the mains bridge rectifier. The power dissipation of the reset diodes depends on the construction of Tr1 (inductance, stray inductance), but is much lower than the dissipation of the IGBTs. The rectifier bridge has a power dissipation of up to about 30W. UG5JT diodes and the rectifying bridge are placed on the same heatsink as the IGBTs. UG5JT diodes also can be replaced with MUR1560 or FES16JT or other ultrafast diodes. During construction it is also necessary to decide the maximum loading factor of the welding inverter, and accordingly select size of heatsinks, winding gauges and so on. It is also good to add a fan.

     Switching transformer Tr1 is wound on two ferrite EE cores, each with a central column cross section 16x20mm. The total cross section is therefore 16x40mm, the core must have no air gap. 20 turns primary winding is wound using 14 wires of a 0.5 mm diamater. It would be better to use 20 wires, but they didn't fit into my core. Secondary winding has 6 turns of a copper strip (36 x 0.5 mm). Forward gate-drive transformer Tr2 is made with an emphasis on low stray inductance. It is trifillary wound, using three twisted insulated wires of 0.3 mm diameter, and all the windings have 14 turns. Core is made of material H22, middle column has a diameter of 16mm, with no gaps. Current sensing transformer Tr3 is made from an EMI suppression choke on a toroidal core. The original winding with 75 turns of 0.4 mm wire works as a secondary. Primary has just 1 turn. Polarity of all the transformer windings must be kept (see dots in schematic)! L1 inductor has a ferrite EE core, middle column has cross section 16x20mm. It has 11 turns of a copper strip (36 x 0.5mm) and the total air gap in the magnetic circuit is 10mm. Its inductance is cca 12uH.

     The auxiliary 17V switching power supply, including Tr4, is described in more detail here. The simplest welding inverter on Pic 1 has no voltage feedback. Voltage feedback does not affect the welding, but affects the power consumption and heat losses in the idle state. Without the output voltage feedback there is quite high output voltage (approximately 100V) and the PWM controller ia running at its max duty cycle, thereby increasing the power consumption and heating of components. Therefore, it is better to implement the voltage feedback. You can inspire on Pic 2. The feedback can be connected directly because the controll circuit is isolated from mains. The reference voltage is 2.5V. Select the R2 to set the open circuit voltage. You can find useful info in datasheet of UC3842, 3843, 3844, 3845 or in its another datasheet. Inspiration for modifications you can also find in 3-60V 40A supply.

     Interesting links from which I drew:
http://svarbazar.cz/phprs/index.php?akce=souvis&tagid=3
http://leo.wsinf.edu.pl/~leszek/spawarki/
http://www.y-u-r.narod.ru/Svark/svark.htm
http://www.emil.matei.ro/weldinv3.php
http://nexor.electrik.org/svarka/barmaley/kosoy/shema.gif and a little modified: http://nexor.electrik.org/svarka/barmaley/kosoy1/shema.gif

Piratas Del - Caribe 1 La Maldicion Del Perla Negra

Verbinski, Gore, director. Pirates of the Caribbean: The Curse of the Black Pearl. Walt Disney Pictures, 2003.


Esta guía te ofrece todo lo necesario para revivir la aventura de Piratas del Caribe: La Maldición del Perla Negra

, la película de 2003 que revivió el género de piratas y dio inicio a una de las sagas más exitosas de Disney. Resumen de la Trama

La historia comienza cuando el excéntrico Capitán Jack Sparrow llega a Port Royal justo antes de que el temible Perla Negra, bajo el mando del Capitán Barbossa, ataque la ciudad. Los piratas secuestran a Elizabeth Swann, quien posee un misterioso medallón de oro azteca. Para rescatarla, el joven herrero Will Turner se alía con Jack, robando el barco más rápido de la flota inglesa, el HMS Interceptor. La Maldición del Oro Azteca

La tripulación de Barbossa está bajo una terrible maldición por haber robado 882 piezas de oro azteca de la Isla de Muerta.

Efectos: Son inmortales pero no pueden sentir nada; bajo la luz de la luna, se revelan como esqueletos vivientes.

Cómo romperla: Deben devolver todas las monedas al cofre original y ofrecer la sangre de cada uno de los que las tomaron (o de sus descendientes). Personajes Principales Piratas del Caribe: La maldición del Perla Negra

The Alchemy of Adventure: Why The Curse of the Black Pearl Works

When Pirates of the Caribbean: The Curse of the Black Pearl debuted in 2003, it faced immense skepticism. It was a film based on a theme park ride, arriving at a time when the pirate genre was considered "box office poison." However, the film defied expectations, becoming a modern classic by masterfully blending gothic horror, high-seas action, and a genre-defining performance.

The Anti-Hero RevolutionAt the heart of the film’s success is Captain Jack Sparrow. Unlike traditional swashbucklers who are defined by earnestness and moral clarity, Jack is an enigma. Johnny Depp’s portrayal—a mix of a rock star’s swagger and a trickster’s unpredictability—redefined the cinematic hero. He doesn’t drive the plot through noble intent, but through self-preservation and wit, making him infinitely more relatable and entertaining than a standard protagonist.

A Perfect Narrative BalanceThe film succeeds because it grounds its supernatural elements in a classic "save the damsel" framework. While the story of Will Turner and Elizabeth Swann provides the emotional stakes, the gothic horror of the Aztec gold curse adds a layer of depth. The imagery of skeletal pirates revealed by moonlight transformed a simple adventure into a visually arresting ghost story. This duality allows the film to appeal to children’s sense of wonder while satisfying adult cravings for a more sophisticated, darker lore.

Craft and SpectacleBeyond the characters, the film is a masterclass in production. Klaus Badelt and Hans Zimmer’s iconic score provides an immediate sense of scale and momentum. The practical effects, combined with (at the time) groundbreaking CGI for the cursed crew, created a world that felt lived-in and tactile. The "Pearl" itself becomes a character—a symbol of freedom that drives every conflict in the story.

ConclusionThe Curse of the Black Pearl is more than a blockbuster; it is a rare example of "lightning in a bottle." By subverting tropes and leaning into a unique "supernatural-swashbuckler" tone, it resurrected a dead genre. It remains a testament to the idea that with the right balance of character, music, and myth, even the most unlikely premise can become a cinematic treasure.

Incorrect but cool: No pirate had a monkey named Jack. But that monkey (Barbossa’s pet) steals the last gold piece in the post-credits scene—keeping the curse alive.


Upon its release in 2003, Pirates of the Caribbean: The Curse of the Black Pearl faced a sea of skepticism. Pirate films had long been box-office poison, dismissed as campy or outdated, and the idea of a movie based on a Disney theme park ride seemed like a cynical cash grab. Yet, against all odds, the film became a global phenomenon. Directed by Gore Verbinski and produced by Jerry Bruckheimer, The Curse of the Black Pearl succeeded not by mocking its source material, but by embracing it with wit, visual grandeur, and genuine pathos. Through its innovative blend of horror and comedy, its deconstruction of heroism, and its unforgettable central performance, the film resurrected the swashbuckling genre and set a new standard for blockbuster entertainment.

The film’s most radical achievement lies in its narrative structure: the pirates are not merely villains to be defeated, but tragic antagonists worthy of both fear and pity. The central conflict is driven not by treasure, but by a curse. Having stolen Aztec gold, Captain Barbossa and his crew are condemned to an eternity of undeath. By moonlight, their flesh rots, their senses vanish—they cannot taste, feel, or satiate their endless hunger. This supernatural horror elevates the plot beyond a simple chase. Barbossa is not a mustache-twirling villain; he is a desperate, suffering creature who eloquently laments, “For too long I’ve been parched of thirst and unable to quench it.” The curse transforms the pirates from generic foes into complex figures whose evil is a byproduct of profound loss. When the final piece of gold is returned and the crew becomes mortal again, their moment of silent, awed relief is more poignant than triumphant. This inversion—where the audience briefly sympathizes with the monsters—gives the film unexpected emotional weight. piratas del caribe 1 la maldicion del perla negra

Complementing this dark mythology is a sharp, modern sense of humor, largely embodied by the film’s greatest creation: Captain Jack Sparrow. Johnny Depp’s iconic performance—a hallucinogenic blend of rock star Keith Richards and cartoon skunk Pepé Le Pew—shattered every convention of the cinematic hero. Jack is neither a noble rogue nor a brave soldier. He is a man of flexible morality, staggering luck, and shameless self-preservation. His every entrance is a disaster (sailing into port on a sinking boat), and his every escape is a miracle. Depp plays Jack as a cunning trickster, forever lying, negotiating, and improvising his way through impossible situations. He is not motivated by love or justice, but by his ship, the Black Pearl. This selfish goal makes him unpredictable and deeply entertaining. He is the film’s chaotic center, forcing the straight-laced heroine Elizabeth Swann and the rigid Will Turner to adapt to his world of deception and wit. In Jack Sparrow, Disney created an antihero for the ages—a man who proves that in a world of curses and commodores, survival belongs to the clever, not the righteous.

Yet, Jack would be lost without his foils: the archetypal romantic leads, Will Turner and Elizabeth Swann. Played by Orlando Bloom and Keira Knightley, they initially appear as standard-issue Disney royalty—the noble blacksmith and the governor’s spirited daughter. However, the film cleverly subverts their roles. Will is brave but painfully naive, bound by a code of honor that the pirates easily exploit. Elizabeth is far more than a damsel in distress; she is a strategic mind who outwits Barbossa by invoking “parley,” and later admits her desire for the pirate’s life of freedom. Their romance is the film’s moral compass, but it is a compass constantly being recalibrated by Jack’s influence. By the end, Will has lied and fought with pirates, and Elizabeth has wielded a sword and commandeered a ship. The film suggests that heroism is not the absence of piracy, but the judicious use of its tactics. The final, thrilling three-way duel between Jack, Will, and Barbossa perfectly encapsulates this theme: honor, selfish cunning, and cursed ambition clash in a moonlit cave, each fighting for a different kind of freedom.

Visually, Verbinski grounds this fantastical story in a tangible, grimy reality. The Black Pearl is a ship of jagged edges and tattered black sails, moving like a phantom across the water. The cinematography captures the beauty of the Caribbean—emerald seas and golden sunsets—while never shying away from the brutality of pirate life. The action sequences are masterclasses in spatial clarity and escalating stakes, from the breathtaking nighttime raid on Port Royal to the bone-crunching skeleton fight in the moonlight. The film’s use of practical effects, particularly the reveal of the cursed pirates as skeletons, was a landmark moment. By blending CGI with animatronics and live-action choreography, the film made the supernatural feel visceral and terrifying.

In conclusion, Pirates of the Caribbean: The Curse of the Black Pearl is far more than a successful summer blockbuster. It is a remarkably literate and self-aware action film that respected its audience’s intelligence while delivering pure spectacle. By building its plot around a tragic curse, populating its world with morally ambiguous characters, and anchoring the chaos to Johnny Depp’s legendary performance, it transformed a potential joke into a cinematic classic. The film proved that adventure stories could be both scary and silly, romantic and cynical. It did not just lift the curse of the Black Pearl; it lifted the curse on pirate movies forever, inviting us all to live by Jack Sparrow’s immortal, paradoxical code: “Take what you can, give nothing back”—and still find a way to be a hero.


Title: Myth, Morality, and the Monstrous Other: Deconstructing Narrative and Theme in Pirates of the Caribbean: The Curse of the Black Pearl

Abstract:
Gore Verbinski’s Pirates of the Caribbean: The Curse of the Black Pearl (2003) revitalized the swashbuckling genre by blending supernatural horror, comedic irreverence, and classical adventure tropes. This paper argues that the film functions as a modern myth that subverts traditional pirate archetypes while exploring themes of greed, freedom, and redemption. Through an analysis of character duality (Jack Sparrow vs. Hector Barbossa), the symbolic function of the Aztec curse, and the narrative role of Elizabeth Swann, this study demonstrates how the film deconstructs the “monstrous other” to question the boundaries between civilization and anarchy, morality and selfishness.

Keywords: Pirates of the Caribbean, film analysis, myth, anti-hero, Gothic fiction, post-classical cinema.


Aunque el famoso tema "He's a Pirate" no fue compuesto originalmente por Zimmer sino por Klaus Badelt (bajo supervisión de Zimmer), la banda sonora de la primera película es inolvidable. El tema principal mezcla:

Hoy, ese riff de cinco notas es sinónimo de aventura pirata en todo el mundo.

La película revitalizó el género de piratas, considerado "muerto" por los estudios de Hollywood tras una serie de fracasos en los años 90. El éxito inesperado lanzó una de las franquicias más rentables de la historia, con cinco películas hasta la fecha y más de $4.5 mil millones recaudados en total.

La interpretación de Depp se convirtió en un ícono cultural instantáneo, generando parodias, referencias y solidificando al actor como una de las mayores estrellas del cine del nuevo milenio.

The film "Piratas del Caribe 1: La Maldición del Perla Negra" (2003) didn't just revive a dead genre; it created a cultural phenomenon. At a time when pirate movies were considered "box office poison," Disney took a gamble on a theme park ride adaptation that changed cinema history. The Plot: Gold, Greed, and Ghosts

The story kicks off in Port Royal, where the governor's daughter, Elizabeth Swann, is kidnapped by the crew of the Black Pearl. These aren't ordinary pirates; led by the menacing Captain Hector Barbossa, they are cursed by Aztec gold to be immortal skeletons who "feel nothing" until the debt of blood is paid.

To save her, the young blacksmith Will Turner strikes an uneasy alliance with the eccentric, disgraced Captain Jack Sparrow, who has his own score to settle with Barbossa and a desperate need to reclaim his beloved ship. The Jack Sparrow Factor

The heart of the film is undeniably Johnny Depp. His portrayal of Jack Sparrow—inspired by Keith Richards and Pepe Le Pew—was initially controversial among Disney executives. However, his "drunk-yet-brilliant" swagger became the film's signature. He isn't a traditional hero; he’s a survivor who uses wit and words more often than steel. Why It Still Holds Up Verbinski, Gore, director

Practical Effects & CGI: The transition from human to skeleton in the moonlight remains impressive today. The balance of physical stunts and digital wizardry created a gritty, tangible world.

The Score: Hans Zimmer and Klaus Badelt’s "He's a Pirate" is one of the most recognizable themes in movie history, instantly evoking a sense of adventure.

The Script: The dialogue is sharp, funny, and surprisingly deep, exploring themes of honor ("The only rules that really matter are these: what a man can do and what a man can't do").

The Chemistry: The trio of Depp, Keira Knightley, and Orlando Bloom provided the perfect balance of humor, grit, and romance. A Lasting Legacy

La Maldición del Perla Negra grossed over $650 million and spawned a multi-billion dollar franchise. It proved that audiences were hungry for high-seas adventure, provided it was served with a side of supernatural mystery and a legendary protagonist.

Even decades later, it remains the gold standard for action-adventure filmmaking, reminding us that "not all treasure is silver and gold, mate."

Should we dive into the historical inspirations behind the Aztec gold or look at how Jack Sparrow's character evolved in the sequels?

La primera entrega de la saga de Piratas del Caribe marcó un antes y un después en el cine de aventuras moderno. Estrenada en 2003, la película no solo revivió un género que se consideraba muerto en Hollywood, sino que también dio vida a uno de los personajes más icónicos de la cultura popular: el Capitán Jack Sparrow.

A continuación, analizamos a fondo las claves de su éxito, su trama, el reparto y el impacto cultural que mantiene hasta el día de hoy.

🏴‍☠️ El Origen: De una Atracción de Feria a un Éxito Taquillero

El proyecto nació con un gran escepticismo por parte de la industria. Estaba basado directamente en una de las atracciones mecánicas más famosas de los parques temáticos de Disney. Pocos creían que una atracción pudiera sostener una película de gran presupuesto, especialmente después de fracasos comerciales previos en el género de piratas como La isla de las cabezas cortadas (1995).

Sin embargo, la visión de los guionistas Ted Elliott y Terry Rossio, sumada a la dirección de Gore Verbinski y la producción de Jerry Bruckheimer, demostró que todos estaban equivocados. La mezcla perfecta de acción, comedia y elementos sobrenaturales cautivó al público de inmediato. 🎬 Sinopsis y Argumento

La historia se ambienta en el mar Caribe durante el siglo XVIII. Todo comienza cuando la tranquila vida de Will Turner, un joven eヒmeritado herrero, se ve truncada tras el ataque a Port Royal por parte de una tripulación de piratas malditos liderados por el Capitán Barbossa. El Rapto de Elizabeth

Los piratas secuestran a Elizabeth Swann, la hija del gobernador y el gran amor secreto de Will. Ella posee un misterioso medallón de oro azteca que los piratas necesitan desesperadamente para romper una terrible maldición. Una Alianza Inesperada

Para rescatarla, Will se ve obligado a liberar y aliarse con el extravagante Capitán Jack Sparrow. Jack, por su parte, tiene sus propios motivos para buscar a Barbossa: recuperar su amado barco, el Perla Negra, el cual le fue arrebatado tras un motín años atrás. La Maldición de la Sangre Esta guía te ofrece todo lo necesario para

Pronto descubren que Barbossa y su tripulación están bajo el influjo de una antigua maldición azteca. Bajo la luz de la luna, los piratas se transforman en esqueletos vivientes. No pueden sentir dolor, pero tampoco pueden disfrutar de los placeres de la vida. Para romper el hechizo, necesitan devolver todas las piezas de oro azteca manchadas con la sangre de quien las tomó. 🎭 Personajes Clave y Reparto

El éxito de la película radica en gran medida en la química de su elenco y la profundidad de sus personajes:

Capitán Jack Sparrow (Johnny Depp): Un pirata excéntrico, impredecible y carismático. Depp se inspiró en el guitarrista de los Rolling Stones, Keith Richards, para crear sus gestos y forma de hablar. Su actuación le valió una nominación al Óscar.

Will Turner (Orlando Bloom): El héroe clásico, noble y valiente. Representa la brújula moral de la historia y está dispuesto a todo por salvar a la mujer que ama.

Elizabeth Swann (Keira Knightley): Lejos de ser la típica damisela en apuros, Elizabeth demuestra ser astuta, valiente y capaz de valerse por sí misma en un mundo dominado por hombres.

Capitán Hector Barbossa (Geoffrey Rush): El villano perfecto. Rush dota al personaje de una presencia imponente, malicia y un retorcido sentido del humor. ✨ Elementos Técnicos y Banda Sonora

La película destaca por un apartado visual y sonoro espectacular que ayudó a sumergir por completo al espectador en la época dorada de la piratería. Efectos Especiales Revolucionarios

Para la época, la transición fluida de los piratas de humanos a esqueletos bajo la luz de la luna fue un logro técnico impresionante a cargo de Industrial Light & Magic (ILM). Los efectos visuales envejecieron de manera excelente. Una Música Inolvidable

Aunque a menudo se le atribuye erróneamente a Hans Zimmer por completo (quien produjo el álbum), la icónica banda sonora fue compuesta principalmente por Klaus Badelt. Temas como "He's a Pirate" se han convertido en sinónimo de aventura marítima en todo el mundo. 🏆 Impacto Cultural y Legado

Piratas del Caribe: La maldición del Perla Negra recaudó más de 650 millones de dólares a nivel mundial y dio pie a una de las franquicias cinematográficas más lucrativas de la historia de Disney, con un total de cinco películas estrenadas hasta la fecha.

La cinta demostró que el cine de aventuras clásico todavía tenía un lugar en el corazón del público moderno si se le añadía frescura, un guion sólido y personajes memorables. Redefinió la figura del pirata en la cultura pop, alejándola de los clichés acartonados del pasado para darle un aire más rockero y místico.

Si quieres explorar más sobre este universo, dime si prefieres que analicemos las diferencias con la atracción original de Disney, los detalles de la producción y el rodaje, o el impacto de las secuelas en la franquicia.


El héroe romántico. Herrero de oficio, espadachín por destreza y enamorado por convicción. Representa el honor en un mundo de traiciones. Su arco narrativo va de hijo desconocido de un pirata a pirata él mismo.

El herrero Will Turner une fuerzas con el excéntrico capitán Jack Sparrow para rescatar a Elizabeth Swann, la hija del gobernador, quien ha sido secuestrada por la tripulación del Perla Negra. Pronto descubren que los piratas están malditos y se transforman en esqueletos vivientes bajo la luz de la luna.

| Elemento | Detalle | |----------|---------| | Director | Gore Verbinski | | Productor | Jerry Bruckheimer | | Guion | Ted Elliott, Terry Rossio | | Música | Klaus Badelt | | Fotografía | Dariusz Wolski | | Duración | 143 minutos | | Presupuesto | $140 millones | | Recaudación | $654 millones |


Homemade inverter welder (welding inverter) schematic
Pic 1 - Homemade inverter welder (welding inverter) schematic - click to enlarge.

voltage feedback
Pic 2 - Voltage feedback addition.

 Tr1 Secondary made of a copper strip
Tr1 Secondary made of a copper strip

 Tr1 Secondary made of a copper strip
Secondary winding with a transformer paper insulation on top. Then I added an insulation tape (about 10 layers) for an extra insulation.

Secondary and a half of a core
Secondary with a half of the core

Tr1 with wound primary
Tr1 with wound primary. Note that the primary doesn't go to the edges, so it can't cut to the secondary.

switching transformer Tr1 with core
switching transformer Tr1 with core

Old Czechoslovak switching supply from the mainframe
Old Czechoslovak switching supply from the mainframe (5V 50A DBP 236 Kosire ZPA). From two such supplies I salvaged parts for the construction of the inverter (ferrites, heatsinks, distance posts, spools, inductors, copper strips, ...)

Diodes STTH200L06TV1 and DSEI60-06A on the heatsink
Diodes STTH200L06TV1 and DSEI60-06A ultrafast diodes on the heatsink

heatsink with diodes, TR1, L1, copper tape
heatsink with diodes, TR1, L1 and copper strip

Gate drive transformer TR2 with trifillar winding (GDT)
Gate-drive transformer (GDT) TR2 with a trifillar winding

Tests of the exciter UC3844, TR2 and shaping circuit
Tests of the exciter UC3844, TR2 and shaping circuit

Shaping circuit for gates
Shaping circuit for gates

piratas del caribe 1 la maldicion del perla negra


Ready to first start :).
Ready to first start :).

Short-term test for 150A - all survived:).
Short-term test for 150A - all survived:).

IGBT, bridge, reset diodes, forming circuits, GDT TR2 and the UC3844 driver.
IGBT, bridge, reset diodes, forming circuits, GDT TR2 and the UC3844 driver.

Current transformer TR3
Current transformer TR3

It is welding :)
It is welding :)

Measurement of arc voltage - long arc
Measurement of arc voltage - long arc

Measurement of arc voltage - short arc
Measurement of arc voltage - short arc

piratas del caribe 1 la maldicion del perla negra


piratas del caribe 1 la maldicion del perla negra
Inverter with auxiliary supply in a temporary case.



The first test (the short-circuit current).


The second test, half the mains voltage, output voltage is too low to hold the arc. At the end you can se PWM on an oscilloscope.


Third test - it is allready welding.


Welding and safety at work - how it should never look like:).



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