Easy startup for A.C.
I was recently scrolling you tube for info on A.C. easy starts and came across easy startup plug in version. It was pretty interesting that it is a plug in at the post and is blue tooth so you can ...
Forum Discussion
For you DIY EE, the "block diagram" on making your own easy start would be something like this :c
Detect that out have an "abnormal" current draw. Either a current sense transformer or a full wave bridge (filtered, into a resistor divider into you control circuit) across the "hot" lead.
The control circuit needs to switch in (relay?) a small value (LARGE power rating) resistor (probably a piece of copper wire) "in line".
Don't worry too much about the "resistor" power factor, it is only going to be in line for about 1 second.
After that 1 second, the relay open (the NC contacts close) and "ob la di, ob la da, life goes on" and any addition over current is handled by the main fuse/circuit breaker.
Like any good DIYer, there needs to be some "trial and error". Try some current detection circuits (the current transformer could be like 10 turns around the hot wire). If you use a relay, the contacts need to be seriously over rated (100A minimum). The "speed" of the relay could be an issue. You don't want to current limit too long as that starting capacitor is going to discharge one it is full enough.
Detect that out have an "abnormal" current draw. Either a current sense transformer or a full wave bridge (filtered, into a resistor divider into you control circuit) across the "hot" lead.
The control circuit needs to switch in (relay?) a small value (LARGE power rating) resistor (probably a piece of copper wire) "in line".
Don't worry too much about the "resistor" power factor, it is only going to be in line for about 1 second.
After that 1 second, the relay open (the NC contacts close) and "ob la di, ob la da, life goes on" and any addition over current is handled by the main fuse/circuit breaker.
Like any good DIYer, there needs to be some "trial and error". Try some current detection circuits (the current transformer could be like 10 turns around the hot wire). If you use a relay, the contacts need to be seriously over rated (100A minimum). The "speed" of the relay could be an issue. You don't want to current limit too long as that starting capacitor is going to discharge one it is full enough.
