So I take it someone here as probably heard of / used lockled antiphase PWM?
Im kind of lost trying to find more info on this. I had trouble finding enough information to actually use it. What I have discovered ive put together into a resonable guess as to how it works...
My guess... You use one PWM output, but split the line, invert one, and feed the normal line to one side of your H-bridge, and the Inverted line to the other side of the H-bridge / driver chip.
Therfor, at 50% the high will cancel out, any movement either way of 50% will increas the high one one side AND the low on the other, leading to motor movement. Is this correct?
And if so, how do you go about generating an inverted PWM? Is it a software thing usually or a hardware thing? And is this method of control bad for the motor / power consumption?
Also, I found lots of references saying you must use a relatively high frequency PWM. Relative to what??? How high is high? my servos opperate at 50Hz so is anything over this relatively high? Will 100Hz be high enough?
Ah too many questions. Help...
Thanks All.
Im kind of lost trying to find more info on this. I had trouble finding enough information to actually use it. What I have discovered ive put together into a resonable guess as to how it works...
My guess... You use one PWM output, but split the line, invert one, and feed the normal line to one side of your H-bridge, and the Inverted line to the other side of the H-bridge / driver chip.
Therfor, at 50% the high will cancel out, any movement either way of 50% will increas the high one one side AND the low on the other, leading to motor movement. Is this correct?
And if so, how do you go about generating an inverted PWM? Is it a software thing usually or a hardware thing? And is this method of control bad for the motor / power consumption?
Also, I found lots of references saying you must use a relatively high frequency PWM. Relative to what??? How high is high? my servos opperate at 50Hz so is anything over this relatively high? Will 100Hz be high enough?
Ah too many questions. Help...
Thanks All.