The three-phase voltage-stabilized inverter power module adopts the input-output isolation solution

The three-phase voltage-stabilized inverter power supply module adopts a two-stage power conversion architecture of DC/AC/industrial frequency transformer, with over-voltage, under-voltage, over-current and over-heat protection functions, control chip HT3117, driver chip IR 2110, and the module adopts input and output isolation solution.

1. a) DC/AC part of inverter power module

Control panel: 170mm, 76mm

Power version: 210mm, 131mm

Heat sink: 219mm, 149mm, 38mm

After adding the heat sink, the overall height of the board is: 84mm

b) Three-phase power frequency transformer

2. 1) Input rated voltage : DC48V; 2) Input rated current : 60A; 3) Output voltage: AC380V; 4) Output frequency: 50Hz

The current transformer is 1.5KW

Transformation ratio: 20/380

Primary leakage inductance: 141uH

Length, width and height are: 260mm, 120mm, 230mm

The winding is aluminum wire, the primary side of the transformer is connected in a triangle, and the secondary side is connected in a star

The maximum current that the board can withstand is 60A. If you want to make it higher power, the principle is the same, just change the switch tube .

Resistive load picture:

The data measured under the three-phase power frequency transformer are as follows:

Test waveform picture:

[page]Time domain waveform: the top is the voltage waveform, the bottom is the current waveform

No-load voltage frequency domain waveform: It can be seen that the voltage THD is 0.4%

Use Chip Notes:

1. P11 of the chip already has a pull-up resistor inside . Do not connect an external pull-up resistor to 5V, because if there are glitches in the 5V voltage, it is easier to damage the chip.

2. The bootstrap diode of IR 2110 should use fast recovery HER108 (75ns), not FR107 (500ns).

3. A 104 capacitor must be added between the auxiliary power supply (5V, 12V) and the ground of the chip (HT3117A, IR2110, etc.) . The chip operating voltage range is 4.5V~5.5V. If the +5V power supply is not clean and there are glitches exceeding 6V, the chip will burn out.

Tips: When the chip is burned or the MOS is prone to failure, please first observe whether the 5V power supply has burrs. Make sure the 5V power supply is clean before checking other reasons.