IEC 62368-1 The wireless power transmitter-foreign objects
Parameters:
According to | IEC 62368-1-clause9.6 |
Insulating board Thickness | 2mm and 5mm(2mm+3mm) |
Insulating board heat resistant | 200℃ |
Thermocouple model | TT-J-36-SLE |
WPC defined metal objects that can be placed between Qi wireless
transmitters and receivers and used to evaluate the FOD operation
and performance.
Description
The Qi Foreign Objects are WPC defined metal objects that can be
placed between Qi wireless transmitters and receivers and used to
evaluate the FOD operation and performance. These objects may be
used for conducting temperature rise tests required for both
transmitter and receivers.
APPLICATION
Product developers looking to quickly characterize and test
wireless power transmitter and receiver foreign object detection
(FOD) performance. WPC specified foreign objects with attached
thermocouples are used to monitor temperature rise at the interface
surface per WPC requirements. These objects are useful for design
debugging, characterization/tuning, and Qi pre-compliance testing.
FEATURES
• Centered Aluminum Disc foreign object specified by WPC V1.2
• Mounted in PEEK high temp plastic frame
• Includes J-type thermocouples and connectors
• Adjustable alignment fixture with 5mm graduations included for
aligning
TPR#5 coil holder and AVID’s Low and Medium Power FOD Receiver coil
holder
TEST MODES
• Can be used to run WPC thermal compliance tests for FOD
• Can be used to help characterize and adjust FOD detection
algorithms
and thresholds for V1.2 and newer transmitters
| 1 | Steel disk |
IEC CDV 62368-1/Ed3-Figure 47 |
| 2 | Aluminium ring |
IEC CDV 62368-1/Ed3-Figure 48 |
| 3 | Aluminium foil |
IEC CDV 62368-1/Ed3-Figure 49 |
Operation method:
A:K-type thermocouple plug, connect to the temperature recorder
B:Insulating board and foreign objects
C:Receiver present
D: Transmitter(Test sample)
1.Connect the test sample to the power supply
2. Connect the thermocouple plug to the temperature recorder
3. Connect the receiver to the load
During each cycle, the foreign object shall be moved on the
transmitter to determine the highest temperature.
Part A: The test is performed by powering up the transmitter and
then placing each of the foreign objects specified in 9.6.2 in
direct contact with the transmitter. This part has four cycles:
– one without a receiver present and with the foreign object in
direct contact with the
transmitter;
– one with a receiver placed in direct contact with the foreign
object;
– one with a receiver placed at a vertical distance of 2 mm from the
foreign object
– one with a receiver placed at a vertical distance of 5 mm from the
foreign object.
Part B: The test is repeated by first placing each of the foreign
objects specified in 9.6.2 in
direct contact with the transmitter and then powering up
transmitter. The four cycles of Part A are then repeated.
During the tests of both part A and part B:
– the temperature of the foreign object shall not exceed 85 ℃ for the steel disk, 120 ℃for the aluminium ring and 155 ℃ for aluminium foil; and
– the temperature of the transmitter shall not exceed the TS2 limits
specified in Table 37.
