Wireless power transfer test system

• US 9,140,763 B2
• Filed: 09/19/2012
• Issued: 09/22/2015
• Est. Priority Date: 09/19/2011
• Status: Expired due to Fees

• Current Assignee: Utah State University
• Original Assignee: Utah State University
• Inventors: Wu, Hunter, Israelsen, Paul D., Gilchrist, Aaron, Sealy, Kylee D.
• Primary Examiner(s): Vazquez, Arleen M
• Assistant Examiner(s): HAWKINS, DOMINIC E
• Application Number:
  US13/622,895
• Publication Number:
  US 20130069625A1
• Time in Patent Office: 1,098 Days
• Field of Search: 324/76.11, 324/72, 324/73, 324/315, 324/340, 324/356, 324/362, 324/370, 324/374, 324/375, 324/379, 324/455, 324/714, 324/378, 324/403, 324/409, 324/410, 324/411, 324/678, 324/76.32, 324/76.34, 324/76.65, 324/76.66, 324/76.67, 324/76.68, 324/87, 324/89
• US Class Current: 1/1
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: G01R 31/40 Testing power supplies testing photovoltaic devices H02S50/10
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A testing system for wireless power transfer systems, including a stationary plate, a rotating plate, and a driver to rotate the rotating plate with respect to the stationary plate.

Claims

1. A test system, comprising:

a stationary plate;

a rotating plate;

a support arm connected to the rotating plate;

a transmitter pad;

a receiver pad, wherein one of

the transmitter pad is coupled to the stationary plate and the receiver pad is coupled to the rotating plate; and

the transmitter pad is coupled to the rotating plate and the receiver pad is coupled to the stationary plate,

and wherein the transmitter pad transmits power wirelessly to the receiver pad when the transmitter pad is rotationally positioned close enough to the receiver pad to transfer power wirelessly from the transmitter pad to the receiver pad; and

a driver that rotates the support arm and the rotating plate with respect to the stationary plate about an axis, wherein the driver rotates the rotating plate past the stationary plate at a speed that approximates of a vehicle on a driving surface.

2. The test system of claim 1, wherein the rotating plate and stationary plate are intermittently in proximity to simulate the conditions of in-motion wireless power transfer.

3. The test system of claim 1, wherein the rotating plate passes directly over the stationary plate when the driver rotates the rotating plate.

4. The test system of claim 3, wherein the distance between the stationary plate and rotating plate when they align is 6 to 20 inches.

5. The test system of claim 1, wherein the support arm that attaches the driver to the rotating plate is adjustable to adjust one or more of

a vertical distance between the rotating plate and the stationary plate, the vertical distance measured in a direction of the axis;

a horizontal distance between the rotating plate and the stationary plate, the horizontal distance measured in a direction perpendicular to the axis; and

an angle between the rotating plate and the stationary plate.

6. The test system of claim 1, wherein the driver variably rotates the rotating plate in a range of from 0-150 rpm.

7. The test system of claim 5, wherein the support arm has an adjustable length.

8. The test system of claim 1, wherein the driver is powered by wireless power transfer.

9. The test system of claim 1, wherein the stationary plate has the receiver pad mounted thereto and the rotating plate has the transmitter pad mounted thereto.

10. The test system of claim 1, wherein the stationary plate has the transmitter pad mounted thereto and the rotating plate has the receiver pad mounted thereto.

11. The test system of claim 1, wherein the stationary plate and the rotating plate are mounted in a horizontal direction with a vertical distance separating the rotating plate and the stationary plate, wherein the vertical distance is in a direction along the axis and the horizontal direction is a direction perpendicular to the axis.

12. The test system of claim 1, wherein the stationary plate and the rotating plate are mounted in a vertical direction with a horizontal distance separating the rotating plate and the stationary plate, wherein the horizontal distance is in a direction perpendicular to the axis and the vertical direction is a direction along the axis.

13. The test system of claim 1, wherein the stationary plate comprises a plurality of stationary plates, each stationary plate is coupled to one of a receiver pad and a transmitter pad, wherein when the stationary plates are each coupled to a transmitter pad, the rotating plate is coupled to a receiver pad and wherein when the stationary plates are each coupled to a receiver pad the rotating plate is coupled to a transmitter pad.

14. The test system of claim 1, wherein the driver rotates the rotating plate past the stationary plate at a speed of between zero and 75 miles per hour.

15. A method for testing a moving wireless power transfer system, the method comprising:

mounting one of a receiver pad and a transmitter pad to a stationary plate;

mounting one of a receiver pad and a transmitter pad to a stationary plate and a rotating plate, wherein when a receiver pad is mounted to the stationary plate, a transmitter pad is mounted to the rotating plate and wherein when a transmitter pad is mounted to the stationary plate, a receiver pad is mounted to the rotating plate;

connecting a support arm between the rotating plate and a driver;

rotating, using the driver, the support arm and the rotating plate with respect to the stationary plate about an axis at a test speed, the test speed consistent with a speed a vehicle travels on a driving surface;

providing power to the transmitter pad, the transmitter pad transmits power wirelessly to the receiver pad when the transmitter pad is in rotationally positioned close enough to the receiver pad to transfer power wirelessly from the transmitter pad to the receiver pad.

16. The method of claim 15, further comprising adjusting the speed of rotation to simulate various speed conditions.

17. The method of claim 15, further comprising adjusting one or more of a distance between the rotating plate and the stationary plate and an angle between the rotating plate and the stationary plate to simulate movement of a vehicle with respect to ground mounted transmitter pads.

18. A test system, comprising:

a plurality of stationary plates;

a rotating plate;

a support arm connected to the rotating plate;

a plurality transmitter pads, wherein each stationary plate is coupled to a transmitter pad;

a receiver pad coupled to the rotating plate, wherein the transmitter pads transmit power wirelessly to the receiver pad when the receiver pad is rotationally positioned close enough to a transmitter pad to transfer power wirelessly from the transmitter pad to the receiver pad;

a driver that rotates the support arm and the rotating plate with respect to the stationary plate about an axis;

wireless power transfer electronics that sends power to the transmitter pad and receives power from the receiver pad;

a controller that controls the driver to control speed of the rotating plate and support arm;

monitoring hardware that monitors one or more of current, voltage, angular position, speed, acceleration, and temperature of one or more of the transmitter pad, the receiver pad, the wireless power transfer electronics and the driver.