Hi all,
I 'd like to control an AC motor(220v), to be precise, i wnat to switch it on and off from a PC. Please suggest me the electronics and the mode of achieving it. Thanks in advance
Sanjay, India
Hi all,
I 'd like to control an AC motor(220v), to be precise, i wnat to switch it on and off from a PC. Please suggest me the electronics and the mode of achieving it. Thanks in advance
Sanjay, India
So is it a 5W shaded-pole single-phase fan motor or a 3-phase 150HP compressor motor or what?
Best regards, Spehro Pefhany
Try a labjack and appropriate power switching relay, < $250 USD total.
Your question is rather like asking, "I want to feed an animal, what should I give it? Oh, it has four legs."
Controls run on information.
Walter.
Some questions need asking first.
There will be other questions.
Essentially, controlling motor driven equipment from a PC is not usually a very good idea. You can still use the PC as part of the MMI but you need some means to mitigate risk should you get a software hang-up or other problems communicating with the motor controller.
Some more details and plenty of us here can begin to provide more suitable answers.
for a circuit idea see:
Isolate your pc from the relay driver circuit as far as practical. There are opto-isolator chips specifically designed to drive relays from ttl (5v). Don't draw power from the PC to energise the relay(s). Use small relays to switch bigger relays or contactors. all circuitry should be protected with MCBs and/or fuses as appropriate. All cables must be rated to carry
Do install a watch dog circuit. for example: If the software on the PC does't trigger the watch dog every 50 ms the watch dog trips out and removes power to the relay board (if that is a safe way to shut down). You have to design the circuit so that it shuts down safely.
You are responsible for your actions. If in doubt take training courses to cover electrical safety, mechanical safety etc.
You have to buy a motor, and its driver, and a PC board for controlling the driver.
You can program to control the motor with Borland C++ or else.
One example of a PC board may be the MEI motion controller. There are various options for you. Check it.
Good luck.
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