2019-07-23, 12:48 AM
(2019-07-23, 12:01 AM)seandepagnier Wrote: As far as I can tell there is much more resistance (more heat generated) by the mosfets of 150 milliohms vs 10 milliohms in my controllers. This driver is fine for a few amps for tillerpilots and wheel drives but I don't suggest it can drive a hydraulic pump.
Thanks for comment.
I agree with you, but any design has own users. I am not trying to compete with you and for >10A yours works better.
About what heat we are talking?
On 10A (full 100% cycle) on 150mOhm MOSFETs it will be (0.150+0.150)*10 = 3W on mine and 0.2W on yours - yes difference in 15 times, but 3W is in absolute maximum mode for the design and 3W is not a huge heat.
It was easier for me to build my own, electronics design and programming is what I like to do. Ant I just share to community.
My bridge is 10A max, but for most linear actuators or ever direct drive even it is overkill.
My average pilot consumption is below 1 amp. means less than 300mW heating in bridge which is almost nothing to talk about.
I never see its temperature grow more than 2-3C under any conditions.