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Innovative New High-Boost DC Power Converter Could Be A Game-Changer For Electronics
The Debrief ^ | APRIL 1, 2024 | MICAH HANKS

Posted on 04/01/2024 11:58:19 AM PDT by Red Badger

Researchers report the development of a new concept for a new DC power converter capable of greater efficiency at lower cost and requiring less maintenance than existing electrical systems.

Developed by a team at Kobe University in Hyōgo, Japan, the direct current voltage boost converter could revolutionize the development and use of electric power generation in various applications.

Boost converters, which are also known as step-up converters, are a variety of switched -mode power supply devices that increase voltage while also reducing current in the conversion of direct current (DC) from the device’s input to its output. Most power converters of this variety contain a pair of semiconductors (and possibly more), along with a diode and a transistor, and an energy storage component that may include a capacitor that is sometimes combined with an inductor.

Boost converters are common features in devices that harvest energy from sources such as sunlight and provide power to medical devices and a range of other technologies. Because of their frequent use, boost converters generally feature as few individual parts as possible to maintain efficiency, both in terms of performance and cost.

Another reason for their simplicity is to help reduce the potential generation of excess heat, as well as electromagnetic “noise” that can potentially lead to disruptions in the performance of an electrical circuit.

Ideally, this kind of power converter can quickly and efficiently change from one state to another within a circuit, with one collecting and storing energy and the other releasing it. However, as the speed at which switching occurs increases, the greater the potential generation of heat and electromagnetic noise can become, which reduces the devices’ performance.

Now, the team at Kobe University believes they may have found a way to overcome some of these problems by combining high-frequency switching capabilities that operate close to ten times higher than existing boost generators and a new technique that limits the amount of heat and electromagnetic noise that normally result from higher switching speeds.

The Kobe team’s power converter, which reportedly reduces electromagnetic noise and a high energy efficiency of over 91 percent (Credit: Mishima Tomokazu).

At the heart of their innovation is a technique known as soft switching. This technique reduces electromagnetic interference and power loss from heat while also reducing the number of components within the device. This combination helps to maintain the traditional cost and performance efficiency of boost generators.

“When the circuit changes between two states, there is a brief period when the switch is not completely closed, and at that point there is both a voltage and a current across the switch,” explained Dr. Mishima Tomokazu in a statement.

In essence, while the switch is operating like a resistor, it dissipates heat. As the device’s switch rate changes, the amount of dissipation also increases. Soft switching helps to ensure that the switch changes occur at zero voltage, which helps to limit the amount of heat loss that occurs.

In the past, soft switching has usually relied on elements known as snubbers, which implement energy sinks during the transition period to help combat energy losses. However, Mishima and his team’s new design relies instead on what are called “resonant tank” circuits, which similarly have lower losses because they can store energy during the switching period.

The Kobe team’s new design also relies on flat components printed onto a circuit board, known as a planar transformer, which reduces heat loss and improves overall efficiency.

“We confirmed that our snubberless design has much reduced electromagnetic noise and a high energy efficiency of up to 91.3 percent, which is unprecedented for a MHz drive with high voltage conversion ratio,” Mishima said, describing a prototype that he and his team constructed.

“This ratio is also more than 1.5 times higher than existing designs,” Mishima said, adding that the team hopes to increase the efficiency of their design even more by using magnetic components that will help to further reduce power dissipation in the device.

“The current development is a 100W-class small-capacity prototype, but we aim to expand the power capacity to a larger kW-class capacity in the future by improving the electronic circuit board and other components,” Mishima said.

The new, highly efficient boost converter could potentially have significant applications in renewable energy, information and telecommunications systems, and even the transportation industry.

Mishima and his colleagues detail their achievement in a study published in the IEEE Transactions on Power Electronics.

TOPICS: Computers/Internet; History
KEYWORDS: dcpowerconverter; japan; kobeuniversity; micahhanks; powerconverter; tech

1 posted on 04/01/2024 11:58:19 AM PDT by Red Badger
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To: ShadowAce; dayglored; Swordmaker; EEGator; SuperLuminal; SunkenCiv

Tech Ping!...................

2 posted on 04/01/2024 11:59:06 AM PDT by Red Badger (Homeless veterans camp in the streets while illegals are put up in 5 Star hotels....................)
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To: Red Badger

I always have to be careful when reading about electronic innovations on April 1st.

Back in the 1970s I subscribed to Electronics Magazine and they always had an April Fools article in the April issue.

The one I can still remember was about a new Input/Output data protocol for interfacing tractors with harvesting implements for automated control and data collection that was proposed by John Deere engineer George MacDonald.

He called it the Extended Implement Electronic Input Output Interface, or the EIE I/O.

3 posted on 04/01/2024 12:13:30 PM PDT by Yo-Yo (Is the /Sarc tag really necessary? Pray for President Biden: Psalm 109:8)
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To: Red Badger

I’m not good at readng schematics. Is one of those squiggles the “And Then A Miracle Happens” box?

4 posted on 04/01/2024 12:16:48 PM PDT by PLMerite ("They say that we were Cold Warriors. Yes, and a bloody good show, too." - Robert Conquest )
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To: Red Badger
Ha, I found it in the Popular Electronics archive:


Q. What is a MacDonald computer interface?

A. Dr. Jerome F. MacDonald is the senior member of a design team that has long been working in the Dairy Science Division of the U.S. Department of Agriculture. They have come up with a communications input/output (I/O) and interchange code for computers, terminals, and real-world inputs. The coding is simple, effective, and easy to use. It's spreading rapidly to other government agencies and now is becoming an industry-wide standard. in fact, the code already has an Electronic Industries Evaluationary (EIE) status. Thus, the old MacDonald farm interface is now an EIE I/O.

5 posted on 04/01/2024 12:20:48 PM PDT by Yo-Yo (Is the /Sarc tag really necessary? Pray for President Biden: Psalm 109:8)
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To: PLMerite

I see a 5 volt input being converted to a 15+ volt output. Maybe that is the magic.

6 posted on 04/01/2024 12:31:51 PM PDT by Blennos ( Byaasea)
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To: Red Badger; Cletus.D.Yokel; Uber-Eng

Heads up

7 posted on 04/01/2024 12:32:21 PM PDT by thinden (buckle up ....)
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To: Red Badger


8 posted on 04/01/2024 1:18:53 PM PDT by sauropod (Ne supra crepidam.)
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To: Red Badger

Interesting. Thanks for posting.

9 posted on 04/01/2024 2:11:09 PM PDT by curious7
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To: Red Badger

I have no real idea how this works, but I use PC power supply to power an immersible pump in a rain barrel for the garden, and a cheap DC PWM variable speed controller for a 12v fan.

Neighbors Pacifica radiator fans will not run unless connected directly, despite replacing sensors. I suggested using a 35 amp switch and a PWM controller, but it would have to be more substantial than mine.

10 posted on 04/01/2024 5:22:08 PM PDT by daniel1212 (Turn 2 the Lord Jesus who saves damned+destitute sinners on His acct, believe, b baptized+follow HIM)
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To: Yo-Yo

Too funny

11 posted on 04/01/2024 5:56:34 PM PDT by OneVike ( Just another Christian waiting to go home)
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To: Yo-Yo
Back in the 1970s I subscribed to Electronics Magazine and they always had an April Fools article in the April issue.

I recall an article about a revolutionary data iCompresson technique developed by Apple programmers that could store 10 megabytes of data in just one bit that was going to change computing forever. The method required a unique iDecompression key for each bit that was a mere 12 megabytes in size. Apple’s engineers were working on reducing the size of the iDecompression key they thought they’d have any day or decade.

12 posted on 04/01/2024 8:30:22 PM PDT by Swordmaker (My pistol self-identifies as an iPad so you must accept it in gun-free zones, you hoplophobe bigots!)
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