The circuit board of the inverter mainly includes a power supply board, a control board, a drive board and a panel.

1.Resistance

The resistance is represented by the letter R on the circuit board, and the units are: ohms (Ω), thousand ohm (KΩ), megohm (MΩ) resistance symbols indicate:

According to the resistance characteristics, it can be divided into fixed resistance, adjustable resistance and special resistance;

According to the material can be divided into carbon film resistor, metal film resistor, wire wound resistor, non-inductive resistor, film resistor, etc;

According to the installation method can be divided into plug-in resistor, patch resistor;

According to the function is divided into load resistance, sampling resistance, shunt resistance, protection resistance, etc.

2.Electric capacity

Capacitive A component with the ability to store electrical energy, mainly used for filtering, coupling, resonance, and our inverter circuit board will also use these functions, naturally, there is no capacitor.

3.Inductance

Inductors and transformers are electromagnetic induction components wound with insulated wires (such as enameled wire, gauze wire, etc.). According to the classification of use, there are oscillating inductors, correcting inductors, picture tube deflection inductors, choke inductors, filter inductors, isolation inductors, compensated inductors.

4.Diode

A diode is a power electronic component that has the ability to switch on and off by combining a P-type semiconductor and an N-type semiconductor to switch on when a forward voltage is applied.

5.Audion

The full name of the transistor should be semiconductor triode, also known as bipolar transistor, crystal triode, is a current control current semiconductor device. Its role is to amplify the weak signal into a larger electrical signal, and is also used as a contactless switch.

1) : According to the material: silicon tube, germanium tube

2) : According to the structure: NPN, PNP

3) : Divided by function: switch tube, power tube, Darlington tube, photosensitive tube, etc

4) : According to power: small power tube, medium power tube, high power tube

5) : According to the working frequency: low frequency tube, high frequency tube, overfrequency tube

6) : According to the structure process: alloy tube, flat tube

7) : According to the installation method: plug-in transistor, patch transistor

6.IGBT

IGBT(Insulated Gate Bipolar Transistor) is a compound fully controlled voltage-driven power semiconductor device composed of BJT(bipolar triode) and MOS(insulated gate field effect tube).

7.Optocoupler

It is a device that transmits electrical signals through light, usually the light source (light-emitting diode) and the light receiving unit (photosensitive semiconductor tube) are packaged in the same tube housing. When the light emitting device emits light, the light receiving unit receives the light and generates photocurrent, which flows out from the output end, thus realizing the "electric-opto-electric" conversion.

8.Crystal oscillator

The crystal oscillator is generally called a crystal resonator, which is an electromechanical device that is made of a quartz crystal with a small electrical loss by precision cutting and grinding and plated with electrodes and welding leads.

9.Other components are multi-pin chip, digital tube, liquid crystal display tube, relay, buzzer and so on.