An inverter comprising: a base provided with a heat dissipation part; a main board disposed on the base to output an input power along an independent power flow through a rectification part and an inverter part; and a control board fixed to be electrically connected to the main board to form a flow of a secondary power and a flow of an electrical signal, wherein the main board comprises an input power connection part to receive the input power, the rectification part, a DC link, the inverter part, and an output terminal, characterized in, that a switched-mode power supply, SMPS, power unit comprised in the control board is configured to generate the secondary power, that the control board is provided with a ground connection part and is electrically connected to an I/O board disposed on the main board, the control board fixing the I/O board and the I/O board provided with a pattern connected to the ground connection part, and that a ground screw is installed at the ground connection part and contacting the heat dissipation part, that the independent power flow is formed through the input power connection part, the rectification part, the DC link, the inverter part, and the output terminal, that the main board further comprises an SMPS power connection part to provide power to the control board, that the control board is perpendicularly installed so as to be electrically connected and fixed to a side portion of the main board, the control board comprising: an SMPS power input unit electrically connected to the SMPS power connection part to transmit the power to the electrically connected SMPS power unit, a controller, and a signal unit, that the SMPS power unit is configured to generate the flow of the secondary power transmitted to the controller and the signal unit, that the electrical signal flow is formed between the controller and the signal unit, wherein the controller and the signal unit are configured to drive the inverter part of the main board. a base provided with a heat dissipation part; a main board disposed on the base to output an input power along an independent power flow through a rectification part and an inverter part; and a control board fixed to be electrically connected to the main board to form a flow of a secondary power and a flow of an electrical signal, wherein the main board comprises an input power connection part to receive the input power, the rectification part, a DC link, the inverter part, and an output terminal, characterized in, that a switched-mode power supply, SMPS, power unit comprised in the control board is configured to generate the secondary power, that the control board is provided with a ground connection part and is electrically connected to an I/O board disposed on the main board, the control board fixing the I/O board and the I/O board provided with a pattern connected to the ground connection part, and that a ground screw is installed at the ground connection part and contacting the heat dissipation part, that the independent power flow is formed through the input power connection part, the rectification part, the DC link, the inverter part, and the output terminal, that the main board further comprises an SMPS power connection part to provide power to the control board, that the control board is perpendicularly installed so as to be electrically connected and fixed to a side portion of the main board, the control board comprising: an SMPS power input unit electrically connected to the SMPS power connection part to transmit the power to the electrically connected SMPS power unit, a controller, and a signal unit, that the SMPS power unit is configured to generate the flow of the secondary power transmitted to the controller and the signal unit, that the electrical signal flow is formed between the controller and the signal unit, wherein the controller and the signal unit are configured to drive the inverter part of the main board.