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
"Uma Musume Cinderella Gray" is part of the "Uma Musume Pretty Derby" series, which combines elements of horse racing with idol culture, featuring anthropomorphic horse girls (umamusume). These characters are inspired by real Japanese thoroughbred horses.
The accessibility of Chapter 180 via platforms like Welovemanga highlights a significant shift in manga consumption patterns. These aggregators serve as the primary interface for non-Japanese readers to engage with currently serializing works that lack simultaneous international licensing.
4.1 The Culture of "Raw" Reading There is a growing trend of readers engaging with raw chapters despite potential language barriers. This suggests that the visual narrative of Cinderella Gray is strong enough to transcend language. Welovemanga, by providing the raw files, caters to this demographic who prioritize immediacy and visual fidelity over linguistic accessibility.
4.2 Community and Speculation The release of Chapter 180 on such platforms drives community engagement. Forums and comment sections often act as "live translation" hubs where fluent readers summarize the dialogue for others. This collective decoding process fosters a unique type of communal reading experience, where the interpretation of the chapter becomes a collaborative effort.
Chapter 180 challenges the series' titular concept of "Cinderella." A Cinderella story implies a magical ascent, but Chapter 180 depicts a grueling slog. The raw depiction of exhaustion serves as a critique of the idol-racing industry.
Given that "Uma Musume Pretty Derby" and its related manga are quite popular among fans of both manga and horse racing, a detailed review would likely appeal to enthusiasts of the series and those interested in the unique blend of sports and idol culture.
Uma Musume Cinderella Gray Chapter 180 is a pivotal chapter titled "I've To Do My Best," featured in Volume 20 of the manga series. This chapter falls within the final segments of the "Gray-Haired Monster" arc, a high-stakes narrative phase that explores protagonist Oguri Cap’s internal and physical struggles as her career reaches its zenith. Plot Summary: The Burden of the "Monster"
In Chapter 180, the story continues to delve into the psychological toll of Oguri Cap's success. As she faces increasingly elite competition, the "Cinderella" motif becomes prominent, illustrating the pressure of her "ticking clock" as she nears the end of her prime.
Emotional Weight: The title reflects Oguri's relentless drive to meet the expectations of her fans and her trainer, despite the physical exhaustion inherent in top-level racing.
The "Monster" Identity: Others perceive Oguri as an unstoppable force, but this chapter highlights her vulnerability as she grapples with the realization that she may be reaching her peak. Reading "Cinderella Gray" Raw Chapters
Anyone caught up with Cinderella Gray? Thoughts and insights.
The Uma Musume: Cinderella Gray manga, illustrated by Taiyou Kuzumi, concluded its serialization in Shueisha's Weekly Young Jump on December 25, 2025. Chapter 180 falls within the final volumes of the series, which reached a total of 23 volumes by March 2026. Chapter 180 Context and Series Status
Umamusume: Cinderella Gray Will End Its Manga on December 25
Umamusume: Cinderella Gray Will End Its Manga on December 25 - IMDb. IMDb News Uma Musume Cinderella Gray Manga to End in 5 Chapters
Uma Musume: Cinderella Gray , Chapter 180 serves as a critical junction in the "Heisei Strongest Three" era, focusing on the intense psychological and physical toll of elite racing on protagonist
. Following the high-stakes confrontations of previous volumes, this chapter deepens the "Cinderella" motif—a ticking clock moving toward a inevitable "midnight" where the magic of Oguri’s legendary run begins to wane. Essay Draft: The Sinking Weight of the Crown Introduction Uma Musume: Cinderella Gray Manga Overview "Uma Musume Cinderella Gray" is part
manga, illustrated by Taiyō Kuzumi, shifts the franchise's tone from lighthearted "pretty derby" idol aesthetics to a visceral sports drama. Chapter 180 is situated within the series' climax, exploring the transition from Oguri Cap's "monster" era to her more human, vulnerable struggles against rising rivals like Super Creek The Burden of the "Monster" Title
At this stage in the narrative, Oguri is no longer just the underdog from Kasamatsu; she is the "Monster" that every other athlete seeks to "slay" to become a legend. Chapter 180 highlights the psychological fatigue inherent in this position. While rivals like Yaeno Muteki
find fuel in their resentment and wariness of Oguri, Oguri herself begins to grapple with the realistic "physical strain" that the series introduces as a darker explanation for a horse girl's decline. The Heisei Strongest Three and the Shift in Power The chapter underscores the shifting dynamics of the Heisei Strongest Three
. Unlike earlier rivalries that felt like hurdles to be cleared, the competition with Inari One and Super Creek is presented as a circular battle where each takes turns defeating the other. Chapter 180 emphasizes that Oguri is being cornered not just by speed, but by the sheer determination of those who have made it their "soul purpose" to defeat her. The Realistic Toll of the Track
Cinderella Gray differentiates itself by providing a "more realistic and darker explanation" for declining performance: the strain on an athlete's heart. This chapter seeds the dread that Oguri’s body may no longer be able to sustain the "miracle" of her running. The "ticking clock" isn't just a metaphor for retirement; it's a physical reality that adds a layer of "suffering" to her final arcs. Umamusume: Cinderella Gray (Manga) - TV Tropes
For a hypothetical summary or placeholder text:
"Chapter 180 of 'Uma Musume Cinderella Gray' continues the enchanting journey of its protagonist, delving deeper into the world of horse racing and the adventures of the Uma Musume. With stunning artwork and a captivating storyline, this chapter likely brings new challenges, friendships, and perhaps a few surprises for our favorite characters. The Cinderella Gray story arc within the Uma Musume universe offers a unique blend of racing excitement, character development, and emotional depth, making it a compelling read for fans."
If you're looking for a description to accompany a scan or read:
"Read Uma Musume Cinderella Gray Chapter 180 raw scan here. This chapter brings you the latest storyline and adventures of the Uma Musume characters in their racing and personal journeys. For more updates and to read Uma Musume Cinderella Gray chap 180 and other chapters, visit welovemanga."
For SEO or general informational purposes:
"Uma Musume Cinderella Gray Chapter 180 - Read the raw scans of Uma Musume Cinderella Gray chap 180 on welovemanga. Discover the thrilling adventures of horse girls in this popular manga series. Uma Musume Pretty Derby, known for its dynamic characters inspired by famous racehorses, offers an engaging world of racing, friendship, and growth."
The Uma Musume Cinderella Gray manga, written by Masafumi Sugiura and illustrated by Taiyō Kuzumi, concluded its serialization in Shueisha's Weekly Young Jump on December 25, 2025. The series total spans 210 chapters collected into 23 tankōbon volumes. Chapter 180 Overview
While Chapter 180 was originally published in the latter half of 2024, it falls within the late-stage narrative leading into the manga's final arc, which officially began on July 17, 2025. At this point in the story:
The manga series Uma Musume: Cinderella Gray, illustrated by Taiyou Kuzumi and written by Masafumi Sugiura, concluded its five-year serialization in Weekly Young Jump on December 25, 2025. The story ended with Chapter 210, following the journey of the countryside "monster" Oguri Cap to her final legendary race. Chapter 180 and the Final Arc
Chapter 180 is part of the final major narrative arc, which focuses on the late-career struggles of Oguri Cap during the 1990 racing season. The Gray Aesthetic: The uncolored, raw manga pages
Narrative Context: At this stage in the manga, Oguri Cap is facing significant physical and mental exhaustion. This arc mirrors the real-life history of the racehorse Oguri Cap, where fans and critics alike believed her prime had passed following a string of losses.
The "Monster" in Decline: The chapters around 180 depict Oguri's lowest point, often referred to as her "grayest" days, as she struggles to maintain the dominance that earned her the "Gray Monster" title.
Leading to the Finale: These events set the stage for her "Last Run" in the 1990 Arima Kinen, where she eventually regains her "athlete's heart" and delivers a final, triumphant performance. Publication & Availability
Uma Musume: Cinderella Gray manga, Chapter 180 falls within a highly emotional period for the protagonist,
. During this arc, the story depicts her increasing psychological and physical fatigue as she faces mounting pressure from the media and the weight of public expectation. Chapter 180 Context & Themes
While specific individual page breakdowns for the "raw" chapter are often hosted on external scanlation sites, the narrative around this point in the series includes: The Emotional Decline
: Following major races like the fall Tenno Sho, the story shifts toward Oguri's struggle to maintain her "Beast" persona amidst exhausting training and a sense of isolation after the departure or defeat of key rivals. Support System Strain : The relationship between Oguri and her friend/assistant Berno Light
is central here. Fans have noted that around these chapters, the panels become increasingly "devastating," showing a more "unhinged" side of Oguri and a "terrified" or "broken" Berno as the reality of a racing career's end begins to loom. Leading to Retirement
: This chapter is part of the build-up to the climax where Oguri is ultimately told by her trainer, Roppei, that she should consider retirement, leading to a significant emotional breakdown. Series Status Uma Musume: Cinderella Gray
manga, written by Masafumi Sugiura and illustrated by Taiyō Kuzumi, concluded its serialization in Weekly Young Jump
on December 25, 2025, with Chapter 210. The final volume (Volume 23) has since been released to complete Oguri Cap's journey from Kasamatsu to the national stage. or more details on the anime adaptation that premiered in April 2025? Cinderella Gray (Anime) - Umamusume Wiki
The following write-up covers the context and specific events surrounding Chapter 180 of the manga Uma Musume: Cinderella Gray Context: The Final Arc
Chapter 180 occurs during the final stretch of the manga, which officially concluded its serialization in Weekly Young Jump on December 25, 2025, with Episode 210 . This chapter is situated within the high-stakes climax of Oguri Cap’s legendary racing career, focusing on her intense psychological and physical battles as she approaches her final races . Key Events in Chapter 180
The narrative in this section of the manga emphasizes the "monster" legacy of Oguri Cap and the heavy expectations placed upon her .
The Struggle for "The Zone": Around this chapter, Oguri is depicted struggling to reach her peak performance, or "The Zone." There is a palpable sense of despair as she faces younger, formidable rivals while dealing with the physical toll of her career . Final Notes Given that "Uma Musume Pretty Derby"
The Arrival of Folk Queen: This period introduces Folk Queen (based on the real-life New Zealand mare Horlicks). Their encounter is a major highlight, as Oguri—usually known for her bottomless appetite—is shown to be visibly distracted and "smitten" by Folk Queen's presence, mirroring real-life accounts of the two horses .
Psychological Weight: The chapter delves into Oguri's internal monologue regarding her status as a "Cinderella" who rose from the rural Kasamatsu academy to the national stage . She begins to feel the weight of "holding the fort" for her retired rivals like Tamamo Cross . Themes and Impact
Cinderella Story: The manga reinforces the theme of the "Gray Cinderella," highlighting how Oguri’s overwhelming running style overturned common sense in the racing world .
Transition of Generations: Chapter 180 serves as a bridge to the series' finale, setting up the "Last Run" and the eventual symbolic passing of the torch to the next generation, including characters like Special Week .
Which of these do you want?
The Uma Musume: Cinderella Gray manga, written by Masafumi Sugiura and illustrated by Taiyo Kuzumi, concluded its serialization in Weekly Young Jump on December 25, 2025, with Chapter 210. The final collected volume, , was released on March 18, 2026.
As the series is now finished, Chapter 180 is part of the established back-catalog. Series Overview
Protagonist: The story follows Oguri Cap, a "monster" Uma Musume who rises from humble beginnings in the regional Kasamatsu racing scene to become a national idol in the high-stakes Twinkle Series.
Tone: Unlike the more lighthearted segments of the franchise, Cinderella Gray is a serious sports action series focusing on training intensity, racing psychology, and the physical toll of elite competition.
Basis: The plot is heavily grounded in the real-life racing career of the horse Oguri Cap between 1987 and 1990. Context for Chapter 180 Uma Musume: Cinderella Gray Chapter 210 The End. @_adambb
"Uma Musume Pretty Derby" (shortened as "Uma Musume") is a multimedia project that began in 2018, produced by Cygames. It combines elements of anime, manga, and video games, centered around a unique premise: anthropomorphic representations of famous racehorses, reimagined as cute, humanoid girls. These characters, known as "Uma Musume," are not only inspired by real-life racehorses but are also imbued with their abilities and personalities.
The project has quickly gained popularity in Japan and has started to make waves internationally. One of the characters, Cinderella Gray, has captured the hearts of fans worldwide, contributing to the project's growing global fandom.
When discussing the keyword “welovemanga,” it is important to understand the site's specific role. Welovemanga is primarily an aggregator. Unlike dedicated translation groups (like MangaLife or CatMimi), Welovemanga often hosts raw uploads within hours of the Japanese magazine release.
To help you understand the context of the raw Chapter 180, here is the narrative state as of Chapter 179:
The "Uma Musume" series, including "Cinderella Gray," has been adapted into various forms of media, including manga. Fans of the series often seek out manga chapters, including raw (untranslated) versions, to follow the story and support their favorite characters. Websites like "welovemanga" have become hubs for fans to share and read manga, fostering a sense of community among enthusiasts.
However, it's crucial to discuss the implications of consuming raw or untranslated manga. While fan communities are vital for the spread of interest in series like "Uma Musume," they also pose challenges regarding copyright and the support of official creators.
