Question

what do u mean by CHARGING BY THERMO IONIC INDUCTION
describe in breif with suitable diagram.......​

Answer 1

→ Wireless power for inductive charging solutions provides the industry's most integrated and state of the art and wireless charging solutions for inductive charging applications (also known as electromagnetic induction or direct induction). Inductive power solutions can transmit power between two coils close to each other, but can be separated by non-interfering materials, such as plastic mobile phone cases or wooden countertops. This technology facilitates the "full deployment" of inductive charging "hot spots", allowing consumers to charge by simply placing the device on a surface.

→ Inductive chargers require a small form factor

To meet the form factor of ultra-small cell phones, introduced the world's first single-chip wireless power transmitter . Compared with other solutions, the highly integrated wireless power solution can significantly reduce the board space and cost, making it an ideal choice for a variety of applications, including smart phones, tablets, envelopes and other accessories.

About inductive charging

Inductive power technology helps wirelessly transfer power from a power source (inductive charger) to an electrical load (inductive receiver). According to the principle of electromagnetic coupling, an induction charger uses an induction coil to establish an alternating electromagnetic field from a charging base station. At the same time, a second coil embedded in a portable device receives power from the electromagnetic field and then converts it into an electric current, which is used to Power the device and charge the battery. This technique is useful when the wires are dangerous, unable to connect, or inconvenient to use.

Thermal electron emission

• Thermionic emission means that when the temperature of the metal increases, the kinetic energy of the electrons in the metal increases, and the number of electrons whose kinetic energy exceeds the work function gradually increases. When the temperature rises to a certain value, a large number of electrons escape from the metal. This phenomenon is called thermal electron emission. Thermal electron emission is widely used in radio technology. Various electron tubes and electron ray tubes use thermal electron emission to generate electron beams.

Definition

• Thermal electron emission refers to the phenomenon that electrons escape from the surface of a material when heating a metal or other solid material under vacuum or inert gas .

Introduction

• The density of the thermal electron emission current strongly depends on the performance of the material itself and the heating temperature. The temperature should not be too high in use to prevent excessive evaporation of the material [1] .

Work function

• There is a force on the metal surface that prevents the electrons from escaping. The electrons need to overcome the resistance to work, which is called the work of escape. At room temperature, only a very small amount of electrons' kinetic energy exceeds the work function, and the electrons that escape from the metal surface are minimal.

Principle

• Generally, when the metal temperature rises above 1000k, the number of electrons whose kinetic energy exceeds the work function increases sharply, and a large amount of electrons escape from the metal. This is thermionic emission. If there is no external electric field, the escaped hot electrons accumulate near the metal surface and become space charges, which will prevent the hot electrons from continuing to emit.