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MIITO is simply but intelligently designed to heat any liquid directly in a vessel while cutting down on excess water and energy usage.
MIITO is simply but intelligently designed to heat any liquid directly in a vessel while cutting down on excess water and energy usage.
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6,052 backers pledged €818,098 to help bring this project to life.

We got power! + other exciting news

Posted by MIITO (Creator)
64 likes

Dear backers,

This month has been filled with meetings and hands on work. MIITO team has been working on site with both: our manufacturing partner and the German research institute. We have successfully increased the system power and meanwhile continued sourcing the next suppliers and components. Our internal communication channel has been busier than ever with daily reports of development progress. We have been extremely productive and its so exciting to see how things starts to come along.

Here are the main things we have been busy with during the last weeks from both of our development partner

Manufacturing partner

  • Tested the inductance of the new coil designs (proposed by the research institute) and the impact of ferrite material options.
  • With these new coil designs we were able to increase the system power transfer to 800w. As we have mentioned in our previous updates: it has been a major struggle for us to increasing the amount of power that can be transferred into the disk to heat your liquid. In the past we were able to power up 600w but we felt that the power transfer of 600W meant that the time it took to boil water [one of the benchmarks for product performance] was too long. We are so excited to reach 800w! The tests will continue and we are very positive that in further tests we will be able to increase the power transfer to additional 20% to reach the boiling time for 250ml to less than 2min.
  • Based on the outcome of our repeatability tests (start mid of October) we will select the final coil (currently we are running tests with 3 different designs) and modify our power electronics to meet the MIITO custom form factor.
  • Selected the final coil wire material

 

Testing different ferrite placements
Testing different ferrite placements

 

 

 MIITO team giving instructions how to wind the coil:

 project video thumbnail
Replay with sound
Play with
sound

MIITO display

We have selected a display module- we will use an OLED display panel. An OLED display works without a backlight; thus, it can display deep black levels and can be thinner and lighter than a liquid crystal display (LCD) As well OLED displays consumes lower power than LCD displays and can operate in a broader temperature range. After reviewing multiple suppliers- we have found a good partner that has also worked with well recognized brands. Their quality standards fits MIITO and seems to fit out budget.

Evaluating different display options
Evaluating different display options

Certification

MIITO Head of Engineering also visited external certification labs for EMC product certification. At each development milestone we will test MIITO to be sure it meets EMC and safety requirements. Before mass production we will submit the final certification, but it is important to test throughout the development and manufacturing processes as test results could influence necessary modifications to the product and result in updates to the design.

EMC Test lab
EMC Test lab

Research partner

Our research partner has created a tool and an algorithm to simulate thousands of coils and propose only the best fit [to meet our functional requirements]. These “best fit” designs are then reviewed by the development team, and a selection is made to be verified in real life. So far our partner has already simulated more then 10 000 coils for us.

Outcome:

  • Three different coil designs with different layers and winding techniques. All three are working in the same frequency range. First these coils were hand wound by the MIITO team and tested together with the manufacturing partner.
  • Our research partner have defined the system operation conditions- these are the settings that we need to provide for the software for the power electronics to operate (ex frequency, restrictions for current and voltage etc).
  • Additionally, we have sourced three different ferrite materials that were tested together with the new coils in order to find the best performing material in combination with the best coil design. Ferrites are non-conductive ferromagnetic ceramic compounds derived from iron oxides. In our case the ferrite is attached to the coil fixture and its important to choose the right one as this influences the power transfer.

 

Some screen shots of the simulations
Some screen shots of the simulations

 What to expect in the next update:

  • Results from repeatability tests
  • The final coil will be chosen
  • New results on increasing the power transfer
  • Form our power electronics into the MIITO shape ( adjust to the circular shape)
  • Input the MIITO image files into the display demo board (movies coming up)

Until next time!

Your MIITO team

Steffen Beth, Kjell Erden, and 62 more people like this update.

Comments

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    1. Anthony van Inge on

      Is the design of the MIITO (stick+)Disk still subject to change? Because it is not only about the coil concerning energy transfer. So, choosing a different shape (cross-section and thickness) and alloy may help. Also changing the profile and structure of the top side of the disk creating a higher contact surface with the content may help too. (however cleaning the disk-stick should still be easy)
      By the way, what is the heating time for a relatively thick-bottomed cast iron beaker (touching the full MIITO surface = 100% capacitive touch) ?

      Remark: Now I just noticed that on the MIITO technology page an indication is labeled "capacity touch", maybe it should be: "induction touch"? :-)

    2. Joe Stewart on

      @Creator, you mentioned your desire to increase the wattage from 600 to 800 and possibly higher. That got me to thinking about the circuits that exist in US homes. Most kitchen circuits are 15Amp or 20Amp. As noted here, http://diy.stackexchange.com/questions/51060/how-many-lights-can-be-on-one-breaker, you probably don't want to draw more than 60 to 80% of a 15Amp circuit - so keep it under 800 Watts....

    3. Munenori
      Superbacker
      on

      @Creator, i certainly understand the problems when you have an idea and it works with a handbuild prototype (i guess that was the situation with which you started the kickstarter)
      But the boil time problem is one i did not really expect, since i assumed that miito would be faster than your average discounter kettle. At the moment you are even slower than that.
      This bothers me quite a bit, because in my experience induction should be way faster.
      How realistic is the current progress to reach your promised timespan for heating up water?

    4. MIITO Creator on

      Dear Munenori, Martijn and JohnDoe: we definitely are hoping for a better boil time - this is why we continue our tests to increase the power. More power= faster the water will be boiling. This was the main issue that set the development back and the main problem we have been working on during the last months.
      JohnDoe: we haven’t yet started testing the boil time with thicker liquids but we will definitely post these data in our further updates. And it will be very easy to change the C to F :)

      Concerning the timeline and development work needed: Unfortunately when we launched the campaign we didn’t assess the risks correctly and we underestimated some technical challenges. We wish we would have been smarter from the begging and would have had the right minds in the team to evaluate the main risks. We know that this project could have gone more smoothly but with all the ups and downs- we haven’t given up. Quite the opposite- we have formed a super team with the right experience and passion to bring MIITO to your homes.

    5. Missing avatar

      Florian Bauer on

      @Creator - I'm with Trillot and Munenori and want to get this clear and straight: When funding your project the impression was, that you know the electric design and need money for mass production. Now we learn, you only had a intention on the aesthetical design a.k.a. nice people using nice gadgets in the video.
      To say it: it's disappointing! The vague timeline and the specs.
      I welcome that you boil down the wording in your updates as the last ones said "awesome progress", when things where reached we backers thought were already done.
      I know this is Kickstarter, but, to keep in the picture, we thought you just needed fuel and and push for the product. Now we learn you only had a mockup...

    6. Missing avatar

      JohnDoe
      Superbacker
      on

      Looks like you're now back on the path. EMC can be a pain in the a**, especially in home sector. Hope you pass without many struggles. I'm curious about the results.

      Have you already made tests with "thicker" liquids, like potatoe soup / cream of pumpkin? Would be interested in how Miito is doing heating up these.

      Did you consider switching temperature between C and F by tapping on the numbers? Would be great to have that feature as part of the "one fits all" software.

      And yes - I'm also interested in better power transfer and less time for heating.

    7. Martijn on

      @Creator - I am also surprised about the 2 minutes for 250ml. On the campaign page it says 60 seconds for 200ml or 75 seconds for 250ml. Which is significantly faster (approx 35%) than the 120 seconds for 250ml. It was one of the reasons why I chose to back Miito. With 2min for 250ml I can indeed use my current kettle. What makes the difference? Can you pls be so kind to elaborate more on this issue and what the options are to make it faster as described on the campaign page?

    8. Missing avatar

      Linda Steputat on

      Thanks for the update- keep up the good work, stay positive.

    9. Munenori
      Superbacker
      on

      250ml in under two minutes? my cheap electric kettle for 15€ is faster with a whole litre...
      i understand that you need to redsign a lot of it for serial production, but didn't you start the campaign with advertising this as a super fast electric kettle?

    10. Trillot Bernard on

      During the Miito's Kickstarter campaign, everyone thought that all this work was already done!

    11. MIITO Creator on

      Dear Daniel, sorry for the late response! Yes we have already delivered the Tea to the backers but we would be happy to send additional one to you as well. We have to look into how does this work technically. I will write you a personal message beginning of next week!

    12. Missing avatar

      Joachim Bick on

      So what's about OLED burn in?

    13. Missing avatar

      Daniel Arwood on

      Second request here: Have you guys delivered the tea packages to the 41 Cup or Tea backers? Can I please be downgraded to this package and receive the Tea - you can keep the remaining pledge balance to help fund the project.