1, round is good. Circular coil, the manufacturing shape is relatively simple, the coil is easier to evenly distributed on the surface of the object, so it is more suitable for symmetrical structure. Square coils, its manufacturing difficulty is higher, because the production process needs to stack coils, so that the coils tightly together, otherwise there will be problems such as internal capacitance and inductance loss, so it requires higher skills and precision. Therefore, the two are better than the self-made DC motor coil wound into a circle.
2, Yes, do you know the ore radio? That thing has no power source, the energy is the energy of the electromagnetic wave itself, and it must be to convert DC into AC, and the frequency must be high. Rectangular coils of thick copper wire are easier to use, and their magnetic fields are stronger. But the coil or go to the component store to buy better, after all, it is professional. Still do not know can join the QQ discussion group, everyone with you to analyze.
3, to receive the wireless charger transmission of electrical energy. The circle is actually a coil that transmits power to the device's battery via a bus bar. Wireless charge when placing the device on a wireless chargerThe coil in the appliance creates an electromagnetic field, and when the coil of the device is in contact with it, electrical energy is transmitted to the device through induction, thus enabling wireless charging. Therefore, the circle plays the role of receiving wireless charging electricity.
4, rectangle good. Contactless IC card, also known as radio frequency card, is composed of IC chip, induction antenna, packaged in a standard PVC card, chip and antenna without any exposed part.
5, the same size. The same size and as close as possible, otherwise it will have no effect, low conversion efficiency.
6, if the magnetic field line and rotation axisIf the field line is perpendicular to the axis of rotation, there will be an alternating current in the coil. Because the angular velocity of rotation is the same, the area is equal, so the size of the induced electromotive force is exactly the same, and the current size depends on the coil resistance.
1, Apple wireless charging is not fast charging. Wireless charging itself is not efficient, when using Apple's original wireless charger to charge normally, it is also easy to make the Apple phone hot, if coupled with fastCharging, the phone will produce more heat, so there is a certain risk, so, Apple mobile phone generally do not charge fast, do not use wireless charging, wireless charging is just a empty function, not very practical.
2, Yes. iPhone11 built-in wireless charging coil, support wireless charging function, users use wireless charging function, need to buy a separate wireless charger, iPhone11 support 18W fast charge, can be filled in 15 minutes 28%, 30 minutes full 55%, 45 minutes full 74%.
3, Apple wireless charging interfaceThe circle is also called auxiliary touch, small white dot, small circle, virtual home button, and can be turned on as follows: Unlock the phone screen, open the phone Settings icon. In the Settings page, swipe down and tap Accessibility. Then scroll down the screen and tap the touch options. Then find and tap the auxiliary touch option.
Wireless charger usage Wireless charging circular charging : Connect the mobile phone standard charger and data cable to the wireless charger, and then put the mobile phone in the center position of the wireless charger base, you can achieve wireless charging, the indicator light will have a breathing effect, 5 seconds after the extinguish, plug