Hi guys,
I need advice in building an ultra fast H-bridge.. Designed to switch in the preferably 10us range? Is this possible? I used SN754410 from Texas but it doesn't seem to do the trick.
Application:
I got an Homebuilt EDM ram that's controlled via a hydraulic system.. I tried using a LM339 circuit that measures voltage differences to make the ram maintain a certain voltage threshold window or gap.. Meaning Open circuit is 100V and Short Circuit is 0V. Let's say I want a spark gap of 75V. My comparator will compare and try to maintain the gap between the positive and negative terminal by driving the ram in a certain position such that 75V is there.
Problem:
I think my comparator is not fast enough to maintain the ram. Since it is vibrating a lot. Optimum would be it'll be switching my H-bridge so fast that it'll practically maintain a gap of 75V and not vibrate that much. In my case here.. It is swinging up and down in a very slow manner that i can see with the naked eye?
Question:
What H-bridge setup may I use in order to make up and down movement respond faster... The hydraulic movement up and down is controlled by my h-bridge.. The movement is controlled via 12V or 36V in the 600mA range. Reversing voltages makes ram go up and down.
I need advice in building an ultra fast H-bridge.. Designed to switch in the preferably 10us range? Is this possible? I used SN754410 from Texas but it doesn't seem to do the trick.
Application:
I got an Homebuilt EDM ram that's controlled via a hydraulic system.. I tried using a LM339 circuit that measures voltage differences to make the ram maintain a certain voltage threshold window or gap.. Meaning Open circuit is 100V and Short Circuit is 0V. Let's say I want a spark gap of 75V. My comparator will compare and try to maintain the gap between the positive and negative terminal by driving the ram in a certain position such that 75V is there.
Problem:
I think my comparator is not fast enough to maintain the ram. Since it is vibrating a lot. Optimum would be it'll be switching my H-bridge so fast that it'll practically maintain a gap of 75V and not vibrate that much. In my case here.. It is swinging up and down in a very slow manner that i can see with the naked eye?
Question:
What H-bridge setup may I use in order to make up and down movement respond faster... The hydraulic movement up and down is controlled by my h-bridge.. The movement is controlled via 12V or 36V in the 600mA range. Reversing voltages makes ram go up and down.