STAND FOR DIAGNOSTICS OF POWER BOARDS, DRIVERS AND IGBT TRANSISTORS OF CELLS OF FREQUENCY-CONTROLLED DRIVE OF HIGH-VOLTAGE MOTORS Russian patent published in 2025 - IPC G01R31/34 H03K3/00 

FIELD: electric power industry.

SUBSTANCE: test bench for diagnostics of power supply boards, drivers and IGBT transistors of cells of frequency-controlled drive of high-voltage motors is a device having a rectangular housing. Housing houses a central processing unit connected to a power supply unit which is connected to an oscilloscope, a resistor and an ammeter. Central processing unit has an Arduino central processor with an ATmega8A programmable controller which outputs information on a display which forms an output rectangular signal and is connected to an encoder and a unit of dividers which control output voltages. Power supply unit contains the power supply unit itself, which is connected to the charging device, which is connected to the storage battery unit (accumulator battery), which provides the stand independent operation. and connected to the Arduino central processor, an oscilloscope, a resistor, an apmermeter and a voltage converter (DC/AC) from the battery constant voltage to the alternating voltage for the board power supply and control, the latter is connected to a voltage multiplier which converts voltage of 220 V to 500 V, connected through an ammeter to control currents through the transistor and power supply of the power supply board and drivers. On the front surface of the rectangular housing there are: switch SAC 1 "Output 500 V", ammeter display, display of programmable controller ATmega8A, encoder for menu control, oscilloscope display and HLG 1 "Transducer operation" light bulb, HLR 1 "Transducer alarm", as well as switch SAC 2 "Switching on converter". On one of the side surfaces there are connectors of 500 V DC output (J1) and power and driver boards (J2, J3, J4, J5, J6), and on the other – the battery charging connector (J7) for supply from the mains.

EFFECT: efficiency in diagnostics, simplicity of maintenance, as well as reduction of time spent on diagnostics and troubleshooting of VFD of high-voltage motor.

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