Recent content by ElectronS

cool project ... I have 2 questions : 1-what is the ticking sound in the motor testing video ( thermal test ) . is it moving the motor then shutting down then powering again ??? 2-When you solve the logic (reset) problem will you make the schematics pdf open source , I am really interesting in...

nice work :bigthumb: the copper busbars are soldered ??? watch out for the fact the the pcb and the copper have different thermal expansion , so this might cause problems later .

old to-247 packages like IRFP3077 where limited to 120A , However newer mosfets like IRFP7718 using same to-247 package can handle 195A .. maybe they have modified something internally to increase this number So i am sure this will not be the limiting factor , right now it is Heat generated...

Thank u all , you have opened my eyes on the switching power losses , now after 2 days of research i have found an app note from fairchild (now ON semi) called AN-6005 that explains the switching losses in buck converters , i used their formulas to develop my own calculator, hopefully it is...

The picture is for to-220 , but i will be using to-247 , but with similar mounting ( using silicon pad and mosfet clip ) 1-I thought that in mosfets switched at reasonable frequencies 16-20khz , the conduction losses (i2R) are the dominant and switching losses can be ignored . 2- That's...

yes i looked at the datasheet rds vs tempreture The mosfets i will be using are : IRF100P219 (2.5mohm at 12v vgs at 125degree Qgmax =270nC ) OR IRF100P218 (1.8mohm at 12v vgs at 125degree but Qgmax=555nC)

Hi guys i am a newbie EE building a 2 parallel mosfet per side power stage , and would like to know how much current is possible to pass for 2 minutes (peak) and 60mins continous. by figuring out how much thermal power a to-247 package can handle from your experience . The power stage will be...

another interesting design by infeinon ac motor driver for installing on 150mm Diameter motors

why donot you post some pics on your 3kw design and share your thoughts about the subject :) and what is the unique custom design you are talking about :twisted: :mrgreen:

Hi Great work , just a random question, what is the software you are using for designing the pcb , it looks awesome in 3D , much better than ALtium Designer 2016 cheers

wow this look HOT , i didnot know about this chemistry ... what is price of it ? lets say the 100AH cell ? how does it compare to LiFePO4 or LiFeMnPO4 in terms of price , and safety ( charge , discharge , BMS .... )

thanks for the valuable info guys . maybe i am doing it wrong ( my calculations ) So how to choose a suitable motor and gearbox for a kart that weighs 800Kg maximum (with passengers) , top speed 65km/h , wheel diameter is 60cm , maximum incline 20 degree. any rule of thumb ?

No offcourse , any weight saving is a plus for sure . but i was just naming another good quality lead acid that i found , if someone would want it for general use. As for me i am back considering lithium , searching for cheapest , simplest (No BMS) ... :lol:

So there is no significant advantage of going into series or sepEx motor instead of PM , as i suspected the choice usually boils down to availability , price , size ... my misconception is from reading too much theory books and especially this phrase " " Series motors are used traction...

i am doing a research on which motor is better suited for Small EV or kart conversion using a fixed gear (single stage). the options available are : PMDC , SepEx , Series , BLDC . ( No ac motors ) I have found so many information regarding BLDC motors and their advantages , but no useful info...