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    FLIPSKY new 20s 100A tiny controller (vesc based)

    Actually this is more capitalism in its most extreme form (f*** rules! let the market decide!) than communism. This is coming from somebody who lives in an ex-communist country (Romania). Br,
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    As my physics teacher in high school used to say, "fist think, then ... shut up!" :D CSD19536KCS - TO220 100V ESC, good RDSon and total gate charge, and explicitly stated 150A package limited drain current. So no, not all T0220 are the same.
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    Still a TO220. weirdly I could not find the package limited drain current in the datasheet at first glance, but I still think it's there since it's a TO220 limitation, afaik. Anybody? ) BUT, probably a lot more modding is necessary. VESCs measure the phase current, so they can limit it. They...
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    Left side drive: what's current?

    Regarding the reduction ratio, some details: I did a super rough estimation of the values for 80100 80kv, just super rough, so I can simulate the system (don't read anything in the efficiency please :), it's just for the gearing ). With 12T-100T Transmission, 20 inch wheel, on a 16S lipo at...
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    Left side drive: what's current?

    Hi everybody. Regarding 25h sprockets and size - yeah, the smallness is a feature, the 100tooth sprocket I posted is the size of a big disk rotor, so will fit most frames! But then on the other hand also a restriction for the front sprocket. :) The motors I am considering: 1) 80100...
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    But aren't taxes more depending on the country you're in and the commercial ties it has with the country the goods are shipped from? At least I for one expect to need to pay tax, independent of shipping method, with a 95% probability when buying from China. Ow, and hope your controller ends...
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    Left side drive: what's current?

    Not sure if this applies to the OP, but in my case I would add another 2 practical uses for the pedals. 1) safety. I plan to have electric "assist" only once the bike is in motion, not from standstill. This seems quite a bit safer to me. On my electric kickscooter I have the same setup for the...
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    BESC-G4

    Whoa! Somewhere a motor is shivering in horror and disbelief. Sounds more like a weapon to me, than a controller. I'll be watching this thread like one does a good science fiction series. (meaning I will surely never build something thelike, but nonetheless it's awesome to watch) How's the...
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    I don't think they are actively trying to stop updates. I think it's more something along the lines "Well, we adapted the code a bit to our particular implementation and can't be bothered to release it. And what do you mean by GPL? ". If it's a GPL violation, or some other such shenanigan, I...
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    Left side drive: what's current?

    Hi Ham I have a similar dream as yours :). Unfortunately, judging by how much spare time I have, it will remain a dream for quite some time. However I googled quite a bit for left side drive and found a few interesting things. I started searching for large diameter chainwheel, since I hope...
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    I was under the assumption, that when you set a 120A limit in the VESC (don't own one yet, so *assumption alert* ), you set a limit on the RMS current - meaning "continuous equivalent". The actual signal is a PWM of very short much higher current pulses, modulated in an sine or trapezoidal...
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    120A is the package limited max amps of the FET. Bad things happen to FETs that exceed their package limit max current. from https://e2e.ti.com/blogs_/b/powerhouse/posts/understanding-mosfet-data-sheets-part-3 BR,
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    Just a suggestion: Ask them :). They've responded to my emails pretty fast. Probably better than speculation, at least than MY speculation anyway :) So ill stop speculating before I say something dumb again. :) Br,
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    I always wondered where the 75v limit on the 75300 was from. I couldn't tell from casually looking at the schematic and components, I kinda thought that slapping a 100V FET would make it a 20s controller.... (would not have been able to tell even if I invested time in it, tbh). Thanks for this...
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    See the email I posted earlier from flipsky. Its based neither on 4 nor on 6, it's based on 75_300 :) https://vesc-project.com/node/311 -> all open source VESC schematics (afaik) Yes, as you correctly pointed out - if phase current is the same. But if you also increase the number of turns in...
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    Building a motor

    Hi Please please, when you get it, post some details about the 12070. Make a thread! I've seen very similar "12070" motors also offered by freerchobby and a few alibaba vendors. The form factor is imho excellent for ebike use! But the specs from various vendors are all over the place. some...
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    Of course. if you're spinning a motor say 3x slower than it is designed to spin for optimal efficiency, for the same power, you'll need to push 3x more current through it and thus get 3x higher conduction losses. That's why I compared the 2 imaginary systems "keeping the same power and...
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    I am under the impression motor control is defined by the software, so most VESC based designs should be quite similar in that regard. FOC will probably have good efficiency. Also, some motors are easier to be driven than others. The high T count you mentioned would be easier to drive because...
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    Hi. Doesn't mean that, imho. Don't read too much into the spec sheet of the FET. Important stuff that I wanted to highlight: -> pretty good rdson, there are better but it's still good, and decent total gate charge -> will have decent/good efficiency. -> 100V Vds max (just so we have some...
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    Well, good news! Flipsky replied to my inquiry and it seems it really is 20s capable. So you were quite a bit closer to the truth than me! MDP10N027 is 100V 2.8mOhm rdson TO220 FET, quite nice. Would have probably picked something similar myself :) so it looks really promising! Br,
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    Hi. I still think there's a mistake somewhere. 1) Normally the rounded value is 72V / 74V, haven't seen 75v until now for 20s, but who am I? 2) Flipsky 75*** vesc implementations (and not only flipsky, but also the official vesc too) are all 75V absolute max voltage. ( <16s ) 3) In every...
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    Wow. Awesome little thing! So yeah, first of all the specs are contradictory. 75V in the name and title, and then 84V in the description.... But even if it's "just" a 75V max VESC, and it only does half the advertised Amps, its still a very good deal imho. The second best deal in...
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