SPECIFICATIONS

Board size: Length 185* width 95mm

Each phase of the three-phase four-bridge arm and the fourth bridge arm constitute a full-bridge inverter. The input filter capacitance required by the three-phase four-bridge arm inverter with the same power level is much smaller than that of the three-phase half-bridge inverter. Therefore, compared with the three-phase half-bridge inverter, the three-phase four-bridge full-bridge inverter has the advantages of small size, light weight and low cost, so it has good application value.
Three-phase four-bridge inverter, mainly used for three-phase asymmetric load power supply UPS, IF frequency converter and aviation airborne variable speed constant frequency electrical system.

oneLike the three-phase inverter is a three-phase half-bridge inverter with only three bridge arms, when the asymmetric load is powered, it must be connected to an output transformer at the output end, or to a neutral point to form a transformer.

Three-phase four-arm inverter structure, its three-phase load can be balanced or unbalanced, linear or non-linear.
The switching mode of three-phase four-bridge inverter is composed of three-phase half-bridge inverter and a common bridge arm composed of CN10 and CN11.
Switch CN4, CN5, CN10 and CN11 to form A phase full bridge inverter;
Switch CN6, CN7, CN10, CN11 to form a B-phase full bridge inverter;
Switch CN8, CN9, CN10, CN11 to form a C-phase full bridge inverter;
The neutral point is formed by the common bridge arms CN10 and CN11.

Traditional three-phase three-bridge inverter, the output is three-phase three-wire, only line voltage, no neutral line and no phase voltage, can only be obtained through the output three-phase isolation transformer phase voltage and neutral line or neutral line, the same power transformer heavy.

If the neutral line is obtained from the midpoint of the DC bus capacitor, it is a three-phase half-bridge inverter, which can generate three-phase four-wire output, phase voltage and line voltage are available, the output phase current is small, the input capacitance needs to be large, and the midpoint voltage is easy to drift.
Three-phase four-bridge arm output three-phase four-wire, existing cable voltage also has phase voltage and neutral line;

The control driver features: V5.0

1. Pure full high frequency inverter conversion circuit
2. The local mode /485 communication mode is automatically switched, and 485 communication is preferred
3. Output voltage, current, power can start from 0, constant adjustable, 485 touch screen operation
4. With output voltage constant voltage, bus current constant current, completely comparable to the power frequency machine when starting inductive load
5. Boot can achieve output soft start, bus constant current output mode, the output waveform has been pure sine wave
6. In the case of not using 485 communication, the control board can set voltage and current output
7. Support external 485 communication voltage, current display and setting
8. The board is equipped with the switch control output function, the default boot

9.R105 and R106 switch, this control board is connected to the power supply, in the off state, need 485 communication to start

The IGBT module drive control board: default startup time 5 seconds, dead zone 2uS, no output undervoltage/overvoltage protection, convenient for beginners to install 

CN1:Dc control board power input
1. VCC power supply, +12V/24V single power supply;
2. GND power supply negative electrode

CN2: 485Communication interface
1. 485-A
2. 485-B
CN3: Burn writing and display
For program burning, in addition, can be directly connected to the LCD128*64 display screen, directly display parameters
Display LCD12864 Requirements: 5V/ serial port/Chinese character library
1. CLK clock cable
2. DAT cable
3. GND power supply negative electrode
4. +5V output, provide +5V power supply for display and burner
5. vpp burn program

CN12:Output current sampling
1. Sampling of phase A output voltage
2. B phase output voltage sampling
3. C phase output voltage sampling
4. GND Grounding
5. IFB bus current sampling

Disclaimer:

Caution:This product is just an accessory,Belongs to the high voltage device, the wrong connection power immediately burned, no electronic foundation of friends, it is recommended not to buy this product,Users who need professional knowledge of electronic technology;18For adults over one year old!This product sold does not support return and exchange, please be familiar with the buyer, so as not to cause unnecessary trouble, we take caution!

Appendix: 485 communication protocol