DIY IGBT Motor Controller
Upgrade from my first video: http://www.youtube.com/watch?v=iU0KLyCgTHk Again a 1 quadrant PWM motor controller, made from IGBTs instead of MOSFETs. Also, the upgraded motor - both for my go-kart project. See my blog at will-ev.blogspot.com For people asking for schematics - for now I won't provide one, maybe when I have time. It's really simple. Two "single" IGBTs - one used as a switch, which connects Motor- to Battery-; the other as a freewheeling diode from Motor+ to Motor-. An IGBT snubber (blue) across the switching IGBT - just a ~0.6uF 600V cap, there are more complicated ones but you have to choose those more carefully. A capacitor bank across Battery+ and Battery- made with electrolytics (~30mF) and polypropylene (~5uF) and one $12 MLC ceramic cap (designed for switching power supply). Get yourself an IGBT driver, but I used a MOSFET driver instead - takes 5V PWM from microcontroller and outputs huge currents to quickly charge/discharge the IGBT 0 to 15V. (really should be -5 to 15V but I was lazy) All the high current paths must be low inductance. Notice the amount of copper I used! Oh, lastly connect Motor+ to Battery+ to complete the circuit. So, when IGBT is ON, current flows B+ to M+, through motor to M-, through switching IGBT to B-. When IGBT is off, the current flows from M- through freewheeling diode to M+. As in, it continues to flow through the motor in its original direction through the motor from M+ to M- because of its inductance (and possibly because it's generating too). Use this thread for learning: http://ecomodder.com/forum/showthread.php/paul-sabrinas-cheap-diy-144v-moto r-controller-6404.html#post78198
H Bridge Motor Speed Controller Tutorial
An explanation of H bridges (a type of motor control circuit). I also show you how to build a bidirectional motor speed controller. ----===Click "Show More"!===---- Parts: NE555 timer: http://octopart.com/partsearch#!?q=NE555 N-channel MOSFET: http://octopart.com/partsearch#!?q=psmn022-30PL.127 P-channel MOSFET: http://octopart.com/partsearch#!?q=FQP27P06 You can support my videos by browsing my recommended equipment page: http://astore.amazon.com/afromods-20 Or donate here: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=28LL4Z HPKWVYW Or if you are feeling extra generous, bookmark this link and use it as your Amazon home page: http://www.amazon.com/?_encoding=UTF8&camp=1789&creative=9325&linkCode=ur2& tag=afromods-20 If you do that, I get a percentage of everything you buy, and you don't have to spend an extra dime!
500A Motor Controller First Tests in Golf Cart
Here is some of the first tests of my newly designed and prototyped 500A controller. It is based off of Paul's 500A open source Revolt motor controller. More info at http://www.evvette.com/EVVette.com/Motor_Controller.html The controller features a clamping design that involves bolting through the circuit board to press the MOSFET's and Diodes to the heat sink. The golf cart is 36V, and had a maximum top speed of 18MPH before this controller was installed. Further testing will reveal the new top speed.
home made electric gokart 24v starter motor
home made electric gokart 24 v truck starter motor 6.7kw with 2 x 12 v 100amh batteries no controller only one speed fast