Systems and methods for programming of a cooling fan arrangement

• US 9,334,870 B2
• Filed: 12/07/2012
• Issued: 05/10/2016
• Est. Priority Date: 02/24/2009
• Status: Expired due to Fees

• Current Assignee: Marvell Asia Pte Limited (Marvell Technology Group Limited)
• Original Assignee: Marvell World Trade Limited (Marvell Technology Group Limited)
• Inventors: Krishnamoorthy, Ravishanker, Leong, Foo Leng, Susanto, Edy
• Primary Examiner(s): Nguyen, Nam V
• Application Number:
  US13/708,800
• Publication Number:
  US 20130094973A1
• Time in Patent Office: 1,250 Days
• Field of Search: 361/687, 361/679, 361/688, 318/254, 318/400.07, 318/811, 318/599, 417/44.11, 340/3.1, 340/3.44, 340/4.11
• US Class Current: 1/1
• CPC Class Codes: F04D 27/001 Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
• CPC Class Codes: F04D 27/006 by influencing fluid temperatures

Abstract

Embodiments of the present disclosure provide a method that comprises, based upon receipt of a mode command, changing an operating mode of a fan motor controller of a fan to a serial port communication protocol, programming a memory of the fan motor controller with an operating parameter of the fan, and based upon receipt of a serial port command, changing the operating mode of the fan motor controller from the serial port communication protocol to another protocol.

Claims

1. A method of programming a cooling fan arrangement, wherein the cooling fan arrangement includes (i) a fan, (ii) a fan motor, and (iii) a fan motor controller, the method comprising:

receiving, via a power pin of the cooling fan arrangement, power supply from an external system that is external to the cooling fan arrangement;

receiving, via a ground pin of the cooling fan arrangement, ground signal from the external system;

communicating, via a fault output pin of the cooling fan arrangement, fault signals and programming signals with the external system, wherein the cooling fan arrangement does not (i) receive any clock signal from the external system and (ii) transmit any clock signal to the external system;

monitoring, by the fan motor controller, the fault output pin of the cooling fan arrangement, wherein the fan motor controller is configured to selectively

(i) transmit, via the fault output pin and from the fan motor controller to the external system, information associated with a fault of the cooling fan arrangement, and

(ii) receive, via the fault output pin and from the external system, information for programming the cooling fan arrangement,

wherein monitoring, by the fan motor controller, the fault output pin of the cooling fan arrangement comprises

detecting a pre-determined pattern in the fault output pin, and

recognizing the pre-determined pattern as a mode command received from the external system, and

wherein the method further comprises in response to recognizing the pre-determined pattern as the mode command received from the external system, changing an operating mode of the fan motor controller to a programming mode to permit the fan motor controller to receive, via the fault output pin, the information for programming the cooling fan arrangement from the external system.

2. The method of claim 1, wherein detecting the pre-determined pattern in the fault output pin further comprises:

determining that an output state of the fault output pin is different from what is expected from an internal driving of the fan motor controller; and

in response to determining that the output state of the fault output pin is different from what is expected from an internal driving of the fan motor controller, detecting the pre-determined pattern in the fault output pin.

3. The method of claim 1, wherein:

the cooling fan arrangement further comprises a memory; and

the method further comprises

subsequent to changing the operating mode of the fan motor controller to the programming mode, receiving the information for programming the cooling fan arrangement from the external system, wherein the information for programming the cooling fan arrangement comprises an operating parameter of the cooling fan arrangement; and

programming the memory of the fan motor controller with the operating parameter of the cooling fan arrangement.

4. The method of claim 3, further comprising, subsequent programming the memory of the fan motor controller with the operating parameter of the cooling fan arrangement:

receiving, on the fault output pin from the external system, a serial port command to end the programming mode; and

in response to receiving on the pin from the external system the serial port command to end the programming mode, changing the operating mode of the fan motor controller from the programming mode.

5. The method of claim 3, wherein while the operating mode of the fan motor controller is in the programming mode, the information for programming the cooling fan arrangement is received by the fan motor controller, via the fault output pin, from the external system in accordance with a serial port communication protocol.

6. The method of claim 5, wherein:

the cooling fan arrangement comprises a three-wire control arrangement; and

the serial port communication protocol is a one-wire serial port communication protocol.

7. The method of claim 3, wherein programming the memory of the fan motor controller comprises programming the memory of the fan motor controller during production of the cooling fan arrangement.

8. The method of claim 3, wherein programming the memory of the fan motor controller comprises programming the memory of the fan motor controller subsequent to production of the cooling fan arrangement.

9. The method of claim 3, wherein the operating parameter includes a temperature parameter that controls the cooling fan arrangement to achieve a predetermined temperature.

10. The method of claim 3, wherein the operating parameter includes a rounds per minute parameter that controls a speed of the fan motor and thereby the fan.

11. The method of claim 1, wherein:

the cooling fan arrangement is configured in a three wire arrangement such that the cooling fan arrangement communicates with the external system via only the power pin, the ground pin and the fault output pin.

12. A cooling fan arrangement comprising:

a fan;

a fan motor to drive the fan;

a power pin, wherein the cooling fan arrangement is configured to receive, via the power pin, power supply from an external system that is external to the cooling fan arrangement;

a ground pin, wherein the cooling fan arrangement is configured to receive, via the ground pin, ground signal from the external system;

a fault output pin, wherein the cooling fan arrangement is configured to communicate, via the fault output pin, fault signals and programming signals with the external system, wherein the cooling fan arrangement does not (i) receive any clock signal from the external system and (ii) transmit any clock signal to the external system; and

a fan motor controller configured to

monitor the fault output pin of the cooling fan arrangement, wherein the fan motor controller is configured to selectively (i) transmit, via the fault output pin from the fan motor controller to the external system, information associated with a fault of the cooling fan arrangement, or (ii) receive, via the fault output pin and from the external system, information for programming the cooling fan arrangement, wherein the fan motor controller is further configured to monitor the fault output pin of the cooling fan arrangement by

detecting a pre-determined pattern in the fault output pin, and

recognizing the pre-determined pattern as a mode command received from the external system, and

in response to recognizing the pre-determined pattern as the mode command received from the external system, change an operating mode of the fan motor controller to a programming mode to permit the fan motor controller to receive, via the fault output pin, the information for programming the cooling fan arrangement from the external system.

13. The cooling fan arrangement of claim 12, further comprising a memory, wherein the fan motor controller is further configured to:

subsequent to changing the operating mode of the fan motor controller to the programming mode, receive the information for programming the cooling fan arrangement from the external system, wherein the information for programming the cooling fan arrangement comprises an operating parameter of the cooling fan arrangement; and

program the memory of the fan motor controller with the operating parameter of the cooling fan arrangement.

14. The cooling fan arrangement of claim 13, wherein the fan motor controller is further configured to, subsequent to programming the memory of the fan motor controller:

receive, on the fault output pin from the external system, a serial port command to end the programming mode;

in response to receiving on the fault output pin from the external system the serial port command to end the programming mode, change the operating mode of the fan motor controller from the programming mode.

15. The cooling fan arrangement of claim 13, wherein while the operating mode of the fan motor controller is in the programming mode, the information for programming the cooling fan arrangement is received by the fan motor controller, via the fault output pin, from the external system in accordance with a serial port communication protocol.

16. The cooling fan arrangement of claim 15, wherein:

the cooling fan arrangement comprises a three-wire control arrangement; and

the serial port communication protocol is a one-wire serial port communication protocol.

17. The cooling fan arrangement of claim 15, wherein:

the cooling fan arrangement is configured in a three wire arrangement such that the cooling fan arrangement communicates with the external system via only the power pin, the ground pin and the fault output pin.

18. The cooling fan arrangement of claim 15, wherein the cooling fan arrangement further comprises:

a pulse width modulation (PWM) pin.