The circuit board of the inverter mainly includes the power board, the control board, the driver board and the panel.
1. Resistance
Resistors are represented by the letter R on the circuit board in ohms (Ω), kiloohms (K Ω), and megaohms (MΩ)
The resistor symbol indicates:
1. According to the resistance value characteristics, it can be divided into fixed resistance, adjustable resistance and special resistance
2. According to the material, it can be divided into carbon film resistance, metal film resistance, wirewound resistance, non-inductive resistance, thin film resistance, etc
3. According to the installation method, it can be divided into plug-in resistance and chip resistance
4. According to the function, it is divided into load resistance, sampling resistance, shunt resistance, protection resistance, etc
2. Capacitance
Capacitive is a component with the ability to store electrical energy, mainly used for filtering, coupling, and resonance, and our inverter circuit board will also use these functions, naturally capacitors.
3. Inductance
Inductors (inductance coils) and transformers are electromagnetic induction components wound with insulated wires (e.g., enameled wires, yarn-wrapped wires, etc.).
According to the classification of applications, there are oscillation inductors, correction inductors, picture tube deflection inductors, current choke inductors, filter inductors, isolation inductors, and compensated inductors.
Fourth, diodes
A diode is a power electronic component with on/off switching capability that turns on when a forward voltage is applied by combining P-type semiconductors and N-type semiconductors.
5. Transistors
The full name of the transistor should be semiconductor transistor, also known as bipolar transistor and transistor, which is a semiconductor device that controls the current of the current. Its function is to amplify a weak signal into an electrical signal with a large radiation, and it is also used as a contactless switch.
1): According to the material: silicon tube, germanium tube
2): According to the structure: NPN, PNP
3): According to the function: switch tube, power tube, Darlington tube, photosensitive tube, etc
4): According to the power: small power tube, medium power tube, high power tube
5): According to the working frequency: low-frequency tube, high-frequency tube, overclocking tube
6): According to the structure process: alloy pipe, plane pipe
7): According to the installation method: plug-in transistor, SMD transistor
6. IGBT
IGBT (Insulated Gate Bipolar Transistor) is a composite fully controlled voltage-driven power semiconductor device composed of BJT (Bipolar Transistor) and MOS (Insulated Gate Field Effect Transistor).
7. Optocoupler
It is a device that transmits electrical signals through light, usually in the same shell as a light source (light-emitting diode) and an optical receiving unit (photosensitive semiconductor tube).
When the luminaire emits light, the light receiving unit receives the light and generates photocurrent, which flows out from the output end, thus realizing the "electricity-optical-electric" conversion.
8. Crystal oscillator
Crystal oscillator, generally known as crystal resonator, is a kind of electromechanical device, which is made of quartz crystal with little electrical loss by precision cutting and grinding and electrode plating and welding leads.
9. Other components include multi-pin chips, digital tubes, liquid crystal display tubes, relays, buzzers, etc.
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