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hit_it
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Hi, I have a central vacuum system that has blown it's circuit board up.
Basically a hoover with a low voltage switching system to fire the motors up.
Finding a new board will be difficult so I'm going to rebuild the control system. I can solder, can rewire a house, but the finer points of electricity elude me. Any pointers would be very helpful!
Question 1 - I have a 30 amp relay (12VDC coil, contacts rated to 30A @ 300VAC), to be controlled from a 12 volt DC 300mA power supply. The relay will switch the AC vacuum motor power.
The 12V goes to the vacuum wall points, through contacts in the hose to the operating switch at the wand you hold when hoovering.
The 1st question - do I need a resistor or capacitor or anything in series with the 12V operating the coil, to protect the coil in any way? Or do I just stick 12V across the coil and off I go?
Question 2 - I have two vacuum motors - both 1000W bare vacuum motor/fan assemblies with two wires, which were going to the original circuit board.
I plan to hook those two wires to the 240VAC switched through the relay.
Old board has a small induction coil (maybe mains interference suppression?) and what looks like a rectangular yellow box 20mm x 3mm x 8mm approx - I'm guessing this may be a capacitor, OR there's one inbuilt on the motor.
The 2nd question - does each motor need a capacitor to aid starting, and if so, what size? Is this what is meant by soft-start?
House is RCD protected, all will be protected by fuses (one biggish 10A one to the relay, plus a smaller 5A fuse to each motor, and a self resetting 7 Amp breaker to each motor as well ). Belts and braces sit well with me!
Thanks in advance, regards, Andy
Basically a hoover with a low voltage switching system to fire the motors up.
Finding a new board will be difficult so I'm going to rebuild the control system. I can solder, can rewire a house, but the finer points of electricity elude me. Any pointers would be very helpful!
Question 1 - I have a 30 amp relay (12VDC coil, contacts rated to 30A @ 300VAC), to be controlled from a 12 volt DC 300mA power supply. The relay will switch the AC vacuum motor power.
The 12V goes to the vacuum wall points, through contacts in the hose to the operating switch at the wand you hold when hoovering.
The 1st question - do I need a resistor or capacitor or anything in series with the 12V operating the coil, to protect the coil in any way? Or do I just stick 12V across the coil and off I go?
Question 2 - I have two vacuum motors - both 1000W bare vacuum motor/fan assemblies with two wires, which were going to the original circuit board.
I plan to hook those two wires to the 240VAC switched through the relay.
Old board has a small induction coil (maybe mains interference suppression?) and what looks like a rectangular yellow box 20mm x 3mm x 8mm approx - I'm guessing this may be a capacitor, OR there's one inbuilt on the motor.
The 2nd question - does each motor need a capacitor to aid starting, and if so, what size? Is this what is meant by soft-start?
House is RCD protected, all will be protected by fuses (one biggish 10A one to the relay, plus a smaller 5A fuse to each motor, and a self resetting 7 Amp breaker to each motor as well ). Belts and braces sit well with me!
Thanks in advance, regards, Andy