Method for controlling constant air volume of ECM motor in HVAC system
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United States of America Patent
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Dec 5, 2017
Grant Date -
Apr 28, 2016
app pub date -
Jan 4, 2016
filing date -
Jan 14, 2014
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Abstract
A method for controlling constant air volume of an ECM motor in an HVAC system. The method includes: a) acquiring a target air volume Qset input from an external, determining a function Itad=f(n) corresponding to the target air volume Qset by the microprocessor, in which Itad represents a bus current, n represents a rotational speed of the motor; b) acquiring a calculated bus current Itad according to the rotational speed n and the function Itad=f(n), and detecting a real-time bus current Ibus; and c) comparing the calculated bus current Itad with the real-time bus current Ibus by the microprocessor for closed-loop control; when Itad>Ibus, increasing the rotational speed n of the motor; when Itad
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