In air conditioning systems there are small motors opening and closing water valves, dampers etc.. These motors often have a permanent 24 volt AC supply and a variable 0 - 10 volt DC supply. By altering the DC supply the motor opens or closes the valve. At 0 volts the valve is closed and at 10 volts the valve is fully open. How do these motors work?
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Valve Motors
- Thread starter Walden
- Start date
Dear Tmpirrie,
They are typically DC brushless motors with multi-step gear trains. Some have AC synchronous sub-motors with magnetic clutches.
I suggest taking a look at the Electric Control Fundamentals chapter of Honeywell's Engineering Manual of Automatic Controls (the bible for HVAC Controls).
They are typically DC brushless motors with multi-step gear trains. Some have AC synchronous sub-motors with magnetic clutches.
I suggest taking a look at the Electric Control Fundamentals chapter of Honeywell's Engineering Manual of Automatic Controls (the bible for HVAC Controls).
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