INTELLIGENT AIR MOVING APPARATUS
First Claim
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1. An intelligent air moving apparatus for cooling an electronics enclosure, the apparatus comprising:
- a motor for driving a fan at a variable rotational speed;
a microcontroller for controlling the rotational speed of the motor, the microcontroller comprising a speed sensor for sensing the rotational speed;
wherein when the sensed rotational speed falls below a target speed by at least a threshold amount, the microcontroller detects a locked rotor condition and initiates a sequence to shut down and restart the motor.
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Abstract
An intelligent air moving apparatus for cooling an electronics enclosure includes a motor for driving a fan at a variable rotational speed and a microcontroller for controlling the rotational speed of the motor. The microcontroller includes a speed sensor for sensing the rotational speed such that when the sensed rotational speed deviates below a target speed, the microcontroller detects a locked rotor condition.
68 Citations
24 Claims
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1. An intelligent air moving apparatus for cooling an electronics enclosure, the apparatus comprising:
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a motor for driving a fan at a variable rotational speed; a microcontroller for controlling the rotational speed of the motor, the microcontroller comprising a speed sensor for sensing the rotational speed; wherein when the sensed rotational speed falls below a target speed by at least a threshold amount, the microcontroller detects a locked rotor condition and initiates a sequence to shut down and restart the motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for cooling an electronics enclosure, comprising:
a plurality of fan modules, each fan module comprising; a motor for driving a fan at a variable rotational speed; a microcontroller for controlling the rotational speed of the motor; an interface for electronically communicating between the microcontroller and an infrastructure controller external to the fan module, the infrastructure controller providing a target speed to the microcontroller; and a memory for storing data including speed avoidance zones; wherein when the target speed falls within one of the speed avoidance zones, the microcontroller controls the motor speed to be slightly outside said speed avoidance zone. - View Dependent Claims (17, 18, 19, 20)
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21. A method of cooling an electronics enclosure comprising:
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providing at least one fan module comprising a multi-phase motor for driving a fan at a variable rotational speed and a microcontroller for controlling the rotational speed of the motor; sensing the rotational speed; and detecting a locked rotor event when the sensed rotational speed falls below a target speed by at least a threshold amount. - View Dependent Claims (22, 23, 24)
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Specification