Ok I got one of these controllers to play with ( to add my power stage too ) I have just set it up to make sure it all works before I start messing with it. for some peoples information it runs sensorless mode if the correct timing from sensors is not present which I was not expecting but on a big plus note the sensorless startup seems really strong I may have to put it on a bike and see just how good it starts up under really big loads.gwhy! wrote:do anyone know anything about these controllers ? they seem to be a good price..
http://stores.ebay.co.uk/VirtualVillage ... =241440152
yes, I have just done some load testing on it with a couple of my rc motors ( 170kv motors) . It works very well sensorless ( im impressed ) it do suffer from the cutting out problem at mid throttle ( if using sensors or sensorless ) but this can be sorted.bobale wrote:So you're saying this 48V 600W controller is working in sensorless mode?
there is a program header on the board, I will do some pin tracing tomorrow from the controller chip to see if it ties in with the infineonszombiess wrote:Anyone know what board is used and if it's programmable?
Thats someting well worth looking intoLHelge wrote:I also bought one of these a while ago, the 48 V 350 W version. It had 6 x STP75N75 as a power stage and is controlled by a STM8 microcontroller. I'm pretty sure you can't program them in the same way as the Infineon controllers but you can download source code for a BLDC controller from ST's homepage. Maybe the designers of this controller have used it without modifying it to much, then you could write your own firmware.
I will be intrested to see what you come up withI replaced the FETs in mine with IRFB3006 instead, beefed up all current traces with 3 x 1,5 mm copper wire and replaced all high power cables with 6 mm^2. Yesterday I tried it for the first time with a Turnigy 80-100 rewinded for 90 rpm/V. 350 W @ 48 V would mean a current limit of ~7 A which wasn't enough to start the motor in sensorless mode. I had to manually place the rotor in balance between two cogging locations first to get it running. After modifying the current shunt to approximately 1/3 of the resistance the motor started up every try. My next step is get the sensors, that I installed on the Turnigy, running.
Just had a quick look at the fets and they have a very reasonable spec, I dont see any reason why you cant run these upto about 70A in this controller. I have the 75v version of these fets in a infineon controller that I push at around 80A without any problems except the controller do get a bit warm.I plan to run this controller on 12S LiPo, how many amps do you think it could handle with my setup? Could I push it up to 50 A?
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sin = getADSin(); cos = getADCos(); deg = atan2(sin, cos) * 180 / pi; PORTA = (deg > 120 && deg < 300); PORTB = (deg > 180 && deg < 360); PORTC = (deg > 240 && deg < 60;