Hi
I am wondering if any know how many different metodes there are to build a motor controller.
Right now, the only ones i know is : H-bridge with transistors, H-bridge with relays, different sort of motor driver ic
Any1 know more metodes, that can be used, and if you do, please post with link to a place where i can read about it.
Or if you already know there +sides and -sides, please write it.
Thanks
Ohh and another question, any of you know why so many build there H-bridge motor controller with relays(still transistors for PWM) instead of just transistors. Is there any big different between them?
You can mix the two
I am running this guy using a mix of mosfets for PWM speed control and relays for reverse. I would say best of both worlds here.
Relays don’t usually consume
Relays don’t usually consume as much power as transistors, so they can drive a big motor with higher efficiency. You can also get multipole relays to swap two connections which is handy for controlling reversing from a single input. Relays can be activated with a totally different circuit to the one being switched, which makes voltage level shifting and isolation super easy.
The main drawbacks of relays are their limited maximum frequency, higher activation power consumption (sometimes), larger physical size and weight.
H-bridge drivers come in many many flavours, the reason being that the H-bridge is the simplest arrangement that can run a motor in both directions using only 2 DC voltages (usually V+ and GND). If you’ve got V+, GND & V- you have some other options too, but you don’t normally see these in hobbyist circuits =)
And now for something completely different.
nice
Nice, thanks.
Had never heard about a Y-bridge. nice to learn someting new :0)
