About me, Contact

By iulian207

My name is Berca Iulian, I am living in Leiden, The Netherlands, I followed the Politechnical University of Bucharest, Faculty of Electrical Engineering, discipline : Electric Motors and Metrology.

I had my own CNC machine, and i was able to make several motor housings. Is a lot of work behind, much more that it seems.

I made many custom motor designs for different clients all around the globe, from: USA, Germany, Switzerland, Turkey, Poland, UK, Japan and many others, with power ranging from 10kW to 350kW.

For any inquire i can be contacted at  i.berca@joulemotors.eu

As a hobby  i have built: electric cars , scooters, bicycles, go karts, quadrcopters ,rc airplanes etc…

I am very passionate about electric motor design, motor controllers, now i’m working to improve the brushless controller and i`m building brushless motors for: Light Airplanes, Large drones, Electric Scooters, Electric cars,boats, Pumps and many other applications.

The new motors  i`m developing will bring high performance at a reasonable prices.

The motors are  high performance type, due to high frequency capability of materials used, careful optimized core design, optimized winding design compared with what industry is using. By being able to design as i consider optimum,  i can go in regions where big companies are behind do to old standards. In this way i will be always move faster than them, with years in advance.

My youtube channel is on http://www.youtube.com/user/iulian207?feature=mhee

Have a nice day, and remember: nothing is impossible, with enough effort.

  1. Ionel says:

    Buna ziua,

    Ai putea sa imi dai un pret pentru masina electrica Agila pe care ai facut-o?

    As fi interest sa o cumpar.

    Ionel DINU

  2. Berca Iulian says:


    Am vazut tocmai acum mesajul de pe site.
    Daca mai esti interesat de masina o dau cu 2000 de euro fara baterii. 3000 de euro cu baterii cu litiu.
    Autonomie aproximativ 70km

  3. horia cristian says:

    Buna ziua, am gasit , cu placuta supriza, site-ul si filmele de pe youtube. De ceva vreme caut informatii despre conversia unui smart.
    Sunt foarte interesat de proiect, dar cunostintele mele tehnice nu sunt suficiente pentru a discerne informatiile de pe internet, mai ales legate de controller. In principiu pare simplu, dar in realitate sunt 1000 probleme mici.
    Puteti sa ma ajutati?
    Horia Cristian

    • Polly says:

      Pin my tail and call me a doynek, that really helped.

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  4. Phil Thomas says:

    Hi On 45Kw motor build you said 14 in parallel 0.5mm wire what was the length of them please, what size the magnets or do you have drgs for motor parts.

    Also how much difference is there in ESC for DC motors and AC 3phase

  5. Keith says:

    Hi over the last 6 months we have spent 600nz dollars on trying to get you circuit for the brushless motor to work many circuit boards have been etched and built

    The mc33035 with Ir2103 and 12×12 voltage converter
    the mosfet are nchannel Ir1405n 55v 169A

    one for each high side and one for each low side (6 in all)

    we have protected the mosfets with a diode drain to source

    ON the bench the controller works ok you can stall the motor let it go and in runs with out problems

    The motors are cyclon 500watt and under load draw 20Amps on a push bike this was tested with a bought controller by the person who gave us the motors.

    Once the motor is coupled to a push bike it runs once then will not run again

    ON checking it all ways takes out (destroys ) one or two drivers

    Thanks Keith

  6. Keith says:

    I may have put wrong email address over last 6 months etc

  7. Hi,

    please contact me as soon as possible.

    with best regards

    A. HAMID

  8. william gobbo says:

    Hi Iulian,
    I sent mail to you

    Please send me a feedback when you read it

    best regards

  9. Andrei Zmeu says:

    Am vrea sa aflu model de senzor hall CU ce numar ca sa pot procura si eu. Si un controler de care marca la volumul de 67 KW poti sami comunici

  10. Andrei Zmeu says:

    dotim un numar de contact prin telefon

  11. Catalin says:

    Ma intereseaza un controller pentru un motor cu perii (carbuni), maxim 80V/300A. Deasemenea, ma intereseaza si o pedala. Pot folosi una de la un BMW diesel (Throttle by wire) ?
    Preturi si termene de realizare/livrare.
    Va rog sa-mi trimiteti un nr de telefon pe email.

  12. Catalin says:

    Imi pare rau ca ai scos de pe site constructia motorului de 45kw. Poti sa repui postarile?

  13. Adrian C says:

    Salut, la comanda faci motoare de acest gen? Sunt interesat de un motor.

  14. mohammad hashemi says:

    dear iulian
    i have project in london UK and was very much interested in talking to yourself regarding some of your work and posible cooperation. pleas contact me

  15. Amigo Lulian, the 45 KW brushless motor, can serve me as an electric generator ?, with 220V output of 50 HZ and 60 HZ, as much as three-phase or moniphasic ?.
    This engine would run continuously for a long time, it would not heat up ?. How much battery you need to start, the idea is to generate your electricity and be autonomous.

  16. Salut domnu Iulian.
    Am văzut că faceți motoare brushless outrunner frumoase si cu eficiență bună. As vrea sa stiu daca construiți si motoare inrunner ? Deoarece eu produc edf rc in carbon si mar interesa motoare facute pe masura…. !

  17. kushal kholapurkar says:

    Hi Iulian,

    This is Kushal Kholapurkar from Nagpur India.

    We are working on electric two wheeler project.

    We need BLDC Motor Controller design with prototype for 72V, 3KW & 72V, 5KW system. Also we want to incorporate WIFI DIRECT module in drive to control from Mobile app.

    Also we need Battery charger design with prototype for Li ion battery bank of 72V, 48Ah.

    We Need Battery management System design with prototype for 72V, 48Ah.
    In this battery Bank we have 2 modules of 72V, 24Ah each inter connected.
    We are using SAMSUNG 18650 cells, 20 Series and 8 parallel configuration in each 72V, 24Ah module.

    We request you to kindly give us best possible quote for design transfer, prototypes and Technical support for the above mentioned project

    Awaiting your early reply,

    Thanks & With Best Regards,

    Kushal Kholapurkar
    Nagpur, Maharashtra, India
    +91-7798969911 (Whatsapp)

  18. Tony Blair says:

    Hi Iulian,

    Iv sent you an email about your motors very interested in what you have managed to build and interested to chat more about your projects.

  19. Tatva Desai says:

    I want to talk with you personally regarding Motor for Super Bike
    Pls can you give me your contact details or WhatsApp or mail so I can contact you for further talks
    Reply as soon as possible.

  20. prasanta kumar mohanty says:

    Pls can you give me your contact details or WhatsApp or mail so I can contact you for further talks
    Reply as soon as possible.

  21. t.r.a snc says:


    hi I would like information for this type of engines:
    are they single-phase or three-phase?
    how much current do they absorb?
    which counter serves kw?
    how many laps can they get?
    can they be connected to an incoder to follow the siri transmitted by another instrument?
    for the purchase of two engines which is the price?
    thank you

  22. Charles Woelfel says:

    Hi, I am building a VTOL and would like approximate weight info on your 35KW continuous, BLDC motor. It will need high quality axial bearings and sprocket . It will be used for power assistance to engine and one motor for back up power. Thank you

  23. Thilo Presser says:

    Hello Berca Iulian,

    i am intersted in your Brushless outrunner! Please contact me and send me your Phone number please.

    Best from Berlin Germany


  24. Gigi says:

    Îmi plac preocupările dumneavoastră. Mă interesează motorul de dronă.

  25. antonio says:

    good morning,

    I wrote it privately about a working partnership.
    thanks for your response !!!

  26. Sudhir Wandrekar says:

    I am electrical engineering graduate from COEP Pune and worked with GE USA in magnet manufacturing MN Then have set up Thick film Hybrid plant in Pune.Was running a Power Electronic factory.We successfully designed Power SMD on on CuAl PCB to manage heat to offer very reliable long life controller.
    I am a project consultant and can facilitate all aspects of project including financial and equity investment.
    If interested please email me and send me you contact details.
    Sudhir Wandrekar

  27. Hugo says:

    Combein de rpm pour le moteur 35kw que vous proposer
    Ou peux on se fournir un esc pour se moteur enfin un qui puise développer 200A

  28. Mahmut KİLCİ says:


  29. Michal says:


    I wrote an email about cooperation.
    Thank you for your response !!!

  30. BAN VIOREL says:


    Kit complet conversie pentru un BMW e46 sau e90, la ce pret ajunge ?

  31. Igor says:

    Hi, Iulian!
    I’m interested in buying this motor kit.
    Can you contact me to clarify the details.

  32. Scott says:

    Just a quick question:
    Have you considered building the 35kw brushless motor using halbach array?
    And in your controller, using snubber non disapative circuits to recover and use fly back wattage?

  33. bobby mcpherson says:

    how much in american dollars does the 35kw pmg cost me to have it built & shipped to my home in Independence, Virginia , because im definitely interested in your work

  34. Travis Spencer says:

    I wanted to know if you can make a 50kw brushless electric motor and how much would it cost ? Thank you very much for your informative youtube videos

  35. concepcion montes says:

    Hello, I live in mexico, iam going to converter a electri c car
    if you can to help me iam going to comunicate whit
    i speak spanish so need to practice the english
    congratulation for your job

  36. Ergo says:

    Hi, i would like to know how many turns do you have on the 45 kw motor per slot? Great website and awesome builds.

  37. Petro says:

    I have made some donation last year. Can you make two 10 Kw motors with drives? I can collect

  38. Mark Ravilious says:

    Hi Iulian,

    I sent you an email a few days ago – I’m developing a lightweight,low cost electric car and would like to ask if you are still working on motor design/development? I am impressed by your motors on youtube and would like to explore the possibility of a custom motor.

    Many thanks, Mark

  39. Rushi Sagare says:

    Hi sir,
    We need 6 Kw Bldc motor and 6 kw PMSM motor for Electric vehicle. Can you produce these small kw motors, if yes then can u send me a brochure of that motors.
    I sent u my email id and i am awaiting to your early reply.
    With best regards.

  40. Whats the price for your 45kw motors

  41. Mike says:

    Drop me a line via email about your motors.
    Quite interested in getting a price on a marine application/solution.

  42. Kate Zhao says:

    Hi sir,

    Good day.Hope everything going well there.
    This is Kate.Our company is the leading producer of shaft coupling for motors.
    May I know if you have any request for the couplings?
    If yes,please write to me: whatsapp:86-15069159203

    Warm Regards,

  43. Michael says:

    Hi berca,

    My name is Michael I sent you an email this morning with a message about the innovation I have designed regarding the marriage between brushed & brushless dc motors, I hope you have read this and will in your own time respond as it’s not only ground breaking but I’d also like you and your team to help get this prototyped with your names on the patents too, michaelm1312515@gmail.com +447979840314

  44. Ricky says:

    What’s the price for a 45 KW motor in a 72 kw motor
    And the ESC controller he built those also

    • bikram says:

      hello berca, i want a 5 kw generator for windmill. high eff, light wt, weather sealed. low rpm about 200 to 300 rpm , high torque, i would like to sit down with u and work out. thx.

  45. Gregorio Silva says:

    Good morning I’m a student in eng. electric and my graduation project and exactly a dc bus motor can send me more details of your project


  46. Mayur B. Shelar says:

    Dear Sir/Mam,

         Mayur here from Nasik, India, I’m pursuing my bachelor in Electrical Engineering ,as I’m having my last year project on BLDC motor and I watched your YouTube channel ,so in this concern I need to talk with you on WhatsApp or the way which you prefer. 

    My WhatsApp number is +918793844629

         Waiting for your response.

  47. Good evening, I was just visiting your website and filled out your feedback form. The “contact us” page on your site sends you these messages to your email account which is why you’re reading my message right now correct? That’s the most important accomplishment with any type of online ad, getting people to actually READ your ad and that’s exactly what I just accomplished with you! If you have an advertisement you would like to blast out to thousands of websites via their contact forms in the US or to any country worldwide send me a quick note now, I can even focus on particular niches and my costs are super reasonable. Send a message to: harry2947har@gmail.com

  48. moh eissa says:

    if you willing to cooperate in the brush less motor please contact me
    mohamed eissa
    email :free66moh66@yahoo.com

  49. Peter Moll says:

    Hallo Iulian
    Astäzi cäutind un encoder pentru un Permanent Magnet Motor,am dat de siteul täu,si lam gäsit foarte interesant.
    Eu sint electrician ,si in Rominia am bobinat motare,dar din päcate nici unul cu encoder, si nici nam stiut ca este asa ceva.
    De 32 ani sint in germania ,si acum mam lovit de aceasta problemä.
    Am citit la tine ca tu faci si encoder pentru motoarele tale,si mam gindit sa te intreb ,poate stii oun siteu unde sa inteleg si eu cum si ce trebuie sa aleg un encoder pentru un motor.
    Cu Stima

  50. james khong says:

    Hello Julian, I had been following you for some time now. Great work! Have a small project, could you give the cost of each of your motor. looking for 48 VDC motor.

    best regards


  51. Travis Spencer says:

    Do U sell your brushless DC Motors and if so , How much would your 50kW motor cost?

  52. Theodoro says:

    Hi my name is Theodoro I’m 15, and I am interested in one electrical motor for one diy motorcycle I’m thinking in 40kw I would like to know how much would cost
    Please contact me in e mail

  53. TRAVIS S says:


  54. Lucas says:

    Estou montando uma empresa espacial privada no Brasil gostaria da sua parceria ?

  55. good article,good blog. it can help more people, it can help me, too.
    i like Berca Iulian

  56. thank you, i like your, i like yur article.
    it can help me
    you are great

  57. arrows hobby says:

    i like your article, it is very good, i like them

  58. Vladimir Burtovoy says:

    Hello Julian!
    I sent several requests to the email address listed above but received no response. Tell me how to contact you to implement a project to develop a brushless motor according to our requirements?
    My email: burtovoy84@mail.ru

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