Abstract: A method (1100) of calibrating a power measuring function (516; 716; 946) of a wireless power device (510; 710; 930) is presented. An alternating electric signal is fed (1110) through a wireless power transmitter coil (520; 720; 920) to drive the wireless power transmitter coil at an operating point. Voltage measurements and current measurements are performed (1120) upon said alternating electric signal or upon a current signal resulting therefrom in the wireless power device. A series of voltage values and a series of current values are produced (1130) from the voltage measurements and current measurements. A power value is calculated (1140) from the produced series of voltage values and series of current values. The method then assesses (1150) whether the calculated power value meets a specification.

Abstract: A foreign object emulation device (60; 160; 260) for testing foreign object detection of a wireless power device (10; 20) is provided. The foreign object emulation device (60; 160; 260) is in operative communication with a processing means (61; 42; 52). The foreign object emulation device (60; 160; 260) comprises a main body (68; 168; 268) being arranged with at least one emulated object (66; 166a-b; 266), a sensor unit (64) comprising at least one temperature sensor (64a) configured to transmit temperature data to the processing means (61; 42; 52), wherein the temperature data is indicative of the temperature of the at least one emulated object (66; 166a-b; 266), and means for causing a controlled relative movement between the at least one emulated object (66; 166a, 166b) and the wireless power device (10; 20) being tested.

Abstract: A foreign object emulation device (100) for testing foreign object detection of a wireless power device (10; 20) having at least one wireless power coil (24;14) is provided. The foreign object emulation device (100) comprises an emulated object (60), and a sensor unit (70) comprising at least one current sensor (72) for measuring the induced current in the emulated object (60). The measured current is indicative of a temperature increase in the emulated object (60) caused by the wireless power device (10; 20).

Abstract: A first method (100) of providing a secondary reference for subsequent use in evaluating a power measuring accuracy of a wireless power measurement device (60) under test is presented. An inanimate calibration object (50) is subjected (110) to electromagnetic field variations (38) by controlling operating points of a reference wireless power transmitter device (30). Key power absorption parameters (58) of the calibration object (50) resulting from the electromagnetic field variations (38) are generated (120) and stored (130) together with data (57) that defines the operating points in a data storage (52) being associated (54) with the calibration object (50).

Abstract: A method of controlling and/or evaluating the temperature of a wireless power coil (105; 205; 305) in coil unit (100; 200; 300) is provided. The method comprises providing a coil unit (100; 200; 300) comprising a wireless power coil (105; 205; 305) comprising at least two strands (112, 114; 212, 214; 312, 314), wherein at least one strand (114; 214; 314) is used for heating and at least one strand (112; 212; 312) is used for wireless power transfer, and applying a current to the least one strand (114; 214; 314) used for heating. The coil unit (100; 200; 300) is in operative communication with a processing means (18, 28, 90) configured to provide a current to the at least one strand (114; 214; 314) used for heating.

Abstract: A system (100) for testing of wireless power equipment in the form of a wireless power transmitter device and a wireless power receiver device is disclosed. The system (100) has a probe device (110) and an analyzer device (130). The probe device (110) has at least one pickup coil (112), the pickup coil being adapted to be placed between a surface of a housing of the wireless power transmitter device and a surface of a housing of the wireless power receiver device to generate electric signals by capturing electromagnetic signals exchanged between the wireless power transmitter and receiver devices pursuant to a wireless power transfer protocol. The probe device (110) also has an interface (114) for providing the electric signals generated by the pickup coil (112) to the analyzer device (130). The analyzer device (130) has an interface (132) for receiving the electric signals from the probe device (110).

Abstract: A first method (100) of providing a secondary reference for subsequent use in evaluating a power measuring accuracy of a wireless power measurement device (60) under test is presented. An inanimate calibration object (50) is subjected (110) to electromagnetic field variations (38) by controlling operating points of a reference wireless power transmitter device (30). Key power absorption parameters (58) of the calibration object (50) resulting from the electromagnetic field variations (38) are generated (120) and stored (130) together with data (57) that defines the operating points in a data storage (52) being associated (54) with the calibration object (50).

Abstract: A foreign object emulation device (60; 160; 260) for testing foreign object detection of a wireless power device (10; 20) is provided. The foreign object emulation device (60; 160; 260) is in operative communication with a processing means (61; 42; 52). The foreign object emulation device (60; 160; 260) comprises a main body (68; 168; 268) being arranged with at least one emulated object (66; 166a-b; 266), a sensor unit (64) comprising at least one temperature sensor (64a) configured to transmit temperature data to the processing means (61; 42; 52), wherein the temperature data is indicative of the temperature of the at least one emulated object (66; 166a-b; 266), and means for causing a controlled relative movement between the at least one emulated object (66; 166a, 166b) and the wireless power device (10; 20) being tested.

Abstract: A system (100) for testing of wireless power equipment in the form of a wireless power transmitter device and a wireless power receiver device is disclosed. The system (100) has a probe device (110) and an analyzer device (130). The probe device (110) has at least one pickup coil (112), the pickup coil being adapted to be placed between a surface of a housing of the wireless power transmitter device and a surface of a housing of the wireless power receiver device to generate electric signals by capturing electromagnetic signals exchanged between the wireless power transmitter and receiver devices pursuant to a wireless power transfer protocol. The probe device (110) also has an interface (114) for providing the electric signals generated by the pickup coil (112) to the analyzer device (130). The analyzer device (130) has an interface (132) for receiving the electric signals from the probe device (110).