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| project:sprinklers [2024-04-17 Wed wk16 13:21] – [Sprinkler Solenoid 24VAC Woes] baumkp | project:sprinklers [2024-04-17 Wed wk16 13:21] (current) – [Sprinkler Solenoid 24VAC Woes] baumkp |
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| - An inductor instead of a resistor may be a more effective solution to reduce the solenoid current and overall real power consumption, however resistors are cheaper and easier to get and also smaller. The resistor power loss is < 1W, where as an inductor would probably reduce this by a factor in the order of 2 - 5. Suitable 10 mH inductors are available for purchase, e.g. [[https://au.mouser.com/ProductDetail/Murata-Power-Solutions/1410604C?qs=5CKLVr1iF0kSPSRQWGAVyQ%3D%3D|Mouser muRata Power Solutions 1410604C ]], which is rated at 10 mH, 4.34 Ω & 0.4 Amps, ±10%. However they are more expensive and larger than simple resistors. They also need to be ordered in instead of being readily available from the local electronics store. | - An inductor instead of a resistor may be a more effective solution to reduce the solenoid current and overall real power consumption, however resistors are cheaper and easier to get and also smaller. The resistor power loss is < 1W, where as an inductor would probably reduce this by a factor in the order of 2 - 5. Suitable 10 mH inductors are available for purchase, e.g. [[https://au.mouser.com/ProductDetail/Murata-Power-Solutions/1410604C?qs=5CKLVr1iF0kSPSRQWGAVyQ%3D%3D|Mouser muRata Power Solutions 1410604C ]], which is rated at 10 mH, 4.34 Ω & 0.4 Amps, ±10%. However they are more expensive and larger than simple resistors. They also need to be ordered in instead of being readily available from the local electronics store. |
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| After 8 weeks of reliable operation with no further solenoid failure the use of a 12 Ω resistor to limit solenoid current and power draw has rectified the solenoid failure problem. It appears the use of valve solenoids provide for dual 50/60 Hz use on 24 VAC are prone to failure with use on 50Hz supplies with voltage at solenoids greater than 24.0 VAC. | After 8 weeks of reliable operation with no further solenoid failure the use of a 12 Ω resistor to limit solenoid current and power draw has rectified the solenoid failure problem. It appears the use of valve solenoids specified for dual 50/60 Hz use on 24 VAC are prone to failure with use on 50Hz supplies with voltage at solenoids greater than 24.0 VAC. |
| ====References==== | ====References==== |
| *[[https://www.electronics-tutorials.ws/accircuits/power-triangle.html|Power Triangle and Power Factor]] | *[[https://www.electronics-tutorials.ws/accircuits/power-triangle.html|Power Triangle and Power Factor]] |