USER MANUAL WMI Wireless Mobile Interface A2C166292 A3C044298 A2C166291 A3C011064 A3C011153 A3C044297 D-WMI2020B D-WMI2020B_User_Manual_Rev4.docx Page 1 1. System Overview Continental Wireless Power Charger is developed for automotive applications. D-WMI2020B model contains the WPC function only. The WMI module and their implementation in different variants inside the vehicle is depicted in Fig. 1. D-WMI2020B Rear armrest Middel armrest Fig. 1 : WMI module and WMI automotive implementation inside the vehicle 1.1 WPC WPC feature of the WMI uses Qi standard of Wireless Power Consortium (WPC) for enabling wireless charging from a base station unit to mobile device. The power transfer method is based on near field magnetic induction between coils. 1.1.1 System Overview The WMI wireless charger provides power transfer from the internal coil to the smartphones'
battery. The power transfer technology is based on Qi standard operating with a fixed frequency of 127.7kHz+/-6kHz. A simple operational description of wireless power transfer can be summarized in two operational modes. The first mode with a defined burst sequence allows the transmitter to detect the smartphone Qi compliant. Then, the second mode allows the power transfer from the WMI to the smartphone. Details of each operational mode are presented below:
1.1.2 WPC modes 1.1.2.1 Ping mode In this operational mode, the WMI module transmits a short time carrier signal with a specific pattern to detect a smartphone. When a mobile device is placed on the WMI, the identification and the collection of configuration information is done. Based on that D-WMI2020B_User_Manual_Rev4.docx Page 2 information, the transmitter creates a power transfer contract containing the maximum power to be delivered to the load. 1.1.2.2 Charging mode After Ping mode, the power transfer starts. In this operational mode, the transmitter sends the carrier at a given level defined in the power contract in the operational Ping mode. The WMI controls the power transferred to the smartphone, in response to the control data messages sent by the smartphone. 1.1.2.3 Transmitter to receiver communications The WMI transmitter communicates to the mobile device using Frequency Shift Keying, in which the Transmitter modulates the Operating Frequency of the Power Signal. 1.1.3 WPC parameters Bellow in table 1, the technical parameters of the WMI WPC feature are specified:
Parameters Carrier frequency Frequency shift Supply voltage Voltage supply range Product operating temperature range Smartphone operating temperature range WPC chipset brand WPC litz coil WPC litz coil gain @ 127.7kHz Max. output power Max. current consumption Vehicle fuse protection Product weight Dimensions (X/Y/Z in mm) Values 127.7 kHz
+/- 6 kHz 12V battery 9V < Vbat < 16V
-40C < Temp < 85C
-20C < Temp < 60C IDT Single coil MPA19 according to Qi standard
-107.1 dBi 15W 3.5A (2A typ) 7.5A 270 g 170/90/33 mm Table 1: WMI WPC technical parameters. The rated output power from the WPC coil is Max. 15W transferred to the load. The receiver manages the wireless charger in order to guarantee stable 15W on the load. D-WMI2020B_User_Manual_Rev4.docx Page 3 1.1.3.1 NFC internal antenna:
Populated inside ECU, but function is not used for D-WMI2020B NFC disabled. Here bellow is shown the NFC antenna for High and Low WMI versions. Large Antenna PCB: NFC internal antenna trace on Small Antenna PCB: NFC internal antenna antenna PCB is shown in green trace on antenna PCB is shown in green Fig. 4: NFC Internal antennas D-WMI2020B_User_Manual_Rev4.docx Page 4 2. Minimum distance from WMI to human body Minimum distances from WMI to human body are described here bellow. Middle Storage Armrest 5 seater rear armrest 4 seater under armrest Distances from WMI to Human body (in cm) WPC Sitting on Knee Leg Body Hand Driver 46.6 19.8 Co-driver 46.6 19.8 14.7 14.7 18.6 18.6 Arm 16.7 16.7 Head 70.7 70.7 Rear 50.4 11.5 10.3 18.3 7.3 58.3 Rear 35.4 10.8 18.4 12.4 12.9 69.3 3. Logos WEEE logo shall be printed in vehicle user manual. Safety mark shall be lasered on product label and printed in vehicle user manual. 4. Regulatory statements D-WMI2020B_User_Manual_Rev4.docx Page 5 NCC ISED Safety statement shall be printed in vehicle user manual.
This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canadas licence-exempt RSS(s). Operation is subject to the following two conditions:
(1) This device may not cause interference.
(2) This device must accept any interference, including interference that may cause undesired operation of the device. Lemetteur/recepteur exempt de licence contenu dans le present appareil est conforme aux CNR dInnovation, Sciences et Developpement economique Canada applicables aux appareils radio exempts de licence. Lexploitation est autorisee aux deux conditions suivantes :
1) Lappareil ne doit pas produire de brouillage;
2) Lappareil doit accepter tout brouillage radioelectrique subi, meme si le brouillage est susceptible den compromettre le fonctionnement. FCC This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause undesired operation. CAUTION TO USERS Changes or modifications not expressly approved by the party responsible for compliance could void the user`s authority to operate the equipment. D-WMI2020B_User_Manual_Rev4.docx Page 6