Drive with integrated inclination sensor

Patent metadata

Field	Value
Publication number	US-9353970-B2
Application number	US-201213730592-A
Country	US
Kind code	B2
Filing date	Dec 28, 2012
Priority date	Dec 28, 2012
Publication date	May 31, 2016
Grant date	May 31, 2016

Abstract

A drive can include a positional sensor within an outer housing of the drive so as to provide an output indicative of a position of the drive. The positional sensor can be an inclinometer. The inclinometer can be used for feedback control of an inclination of the drive. The drive can further include control electronics within the same housing, so as to provide feedback control of a motor of the drive. The control electronics can include an input for receiving a requested inclination and can be configured to drive the motor until the inclinometer outputs a signal indicative of the requested angle.

First claim

What is claimed is:

1. A sun-tracking motor for a solar energy collection device, comprising:
a first mounting portion configured to be mounted to a fixed member relative to the Earth;
a pivoting motor housing;
a motor at least partially disposed within the pivoting motor housing, the motor engaged with the first mounting portion such that the motor drives the pivoting motor housing about a pivot axis relative to the first mounting portion;
a motor controller disposed within the pivoting motor housing; and
an inclination sensor disposed within the pivoting motor housing,
wherein the motor and the inclination sensor pivot with the pivoting motor housing about the pivot axis.

2. The sun-tracking motor according to claim 1 , wherein the motor controller comprises a motor controller circuit board, the motor controller circuit board being electrically connected to the motor, the motor controller circuit board being configured to receive an inclination signal from the inclination sensor.

3. The sun-tracking motor according to claim 2 , wherein the inclination sensor is mounted to the circuit board.

4. The sun-tracking motor according to claim 2 , wherein the motor controller circuit board is configured to receive an inclination request and to drive the motor to an inclination corresponding to the inclination request.

5. The sun-tracking motor according to claim 2 , wherein the inclination sensor is mounted to an inclination circuit board which is separate from and connected to the motor controller circuit board.

6. The sun-tracking motor according to claim 5 , wherein the inclination sensor circuit board comprises at least a first communications module configured to transmit a signal indicative of a detected inclination.

7. The sun-tracking motor according to claim 1 , wherein the motor controller is configured to receive an inclination request signal, an inclination signal from the inclination sensor, and to drive the motor until the motor controller receives a signal from the inclination sensor that corresponds to the inclination corresponding to the inclination request signal.

8. The sun-tracking motor according to claim 1 , further comprising a first gear engaged with the motor such that the motor rotates the first gear about a first rotational axis, the first rotational axis non-parallel with the pivot axis.

9. The solar energy collection system according to claim 8 , further comprising a second gear engaged with the first gear such that rotation of the first gear about the first rotational axis causes the second gear to rotate parallel to the pivot axis.

10. A sun-tracking, solar energy collection system, comprising:
a frame;
at least one solar energy collection device supported by the frame;
a driver assembly configured to pivot the frame through a range of sun-tracking pivot motion about a pivot axis, the driver assembly comprising:
a fixed portion mounted so as to be fixed relative to the Earth; and
a pivoting portion engaged with the fixed portion, the pivoting portion comprising:
a pivoting housing enclosing a motor; and
a motor controller configured to control operation of the motor, the motor being engaged with the fixed portion such that when the motor is driven, the pivoting housing pivots relative to the fixed portion so as to pivot the frame and the motor along the range of sun-tracking pivot motion about the pivot axis; and

an inclination sensor disposed inside the pivoting housing such that the inclination sensor pivots with the pivoting housing about the pivot axis, the inclination sensor configured to detect an inclination of the motor and to output a signal indicative of inclination detected by the inclination sensor.

11. The solar energy collection system according to claim 10 , wherein the motor controller comprises a motor controller circuit board, the motor controller circuit board being electrically connected to the motor, the motor controller circuit board being configured to receive an inclination signal from the inclination sensor.

12. The solar energy collection system according to claim 11 , wherein the inclination sensor is mounted to the circuit board.

13. The solar energy collection system according to claim 11 , wherein the motor controller circuit board is configured to drive the motor to an inclination corresponding to an inclination request signal.

14. The solar energy collection system according to claim 11 , wherein the inclination sensor is mounted to an inclination circuit board which is separate from and connected to the motor controller circuit board.

15. The solar energy collection system according to claim 14 , wherein the inclination sensor circuit board comprises at least a first communications module configured to transmit a signal indicative of a detected inclination.

16. The solar energy collection system according to claim 10 , wherein the motor controller is configured to receive an inclination request signal, an inclination signal from the inclination sensor, and to drive the motor until the motor controller receives a signal from the inclination sensor that corresponds to the inclination corresponding to the inclination request signal.

17. The solar energy collection system according to claim 10 additionally comprising at least a first support pier fixed to the Earth, the fixed portion being fixed to the first support pier.

18. The solar energy collection system according to claim 10 , wherein the motor is offset from the pivot axis in a direction transverse to the pivot axis.

19. The solar energy collection system according to claim 10 , further comprising a first gear engaged with the motor such that the motor rotates the first gear about a first rotational axis, the first rotational axis non-parallel with the pivot axis.

20. The solar energy collection system according to claim 19 , further comprising a second gear engaged with the first gear such that rotation of the first gear about the first rotational axis causes the second gear to rotate parallel to the pivot axis.

Assignees

• Sunpower Corp

Inventors

• Linderman Ryan
• Barton Nicholas

Classifications

• Y02E10/47

  Mountings or tracking · CPC title

• F24S50/80

  for controlling collection or absorption of solar radiation · CPC title

• F24S2030/134

  in the form of gearings or rack-and-pinion transmissions · CPC title

• F24S50/20 Primary

  for tracking · CPC title

• F24S30/425

  Horizontal axis · CPC title