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Repair, Replacement Block check method rectifier and inverter (IGBT) of the inverter.

Block check method rectifier and inverter (IGBT) of the inverter.

To check the volume of the rectifier and variable frequency inverters do as follows:

- Shut off the power inverter and the engine, disconnect the brake resistor (P / +2, RB)

- Use the meter resistance measurement mode (usually in the scale 1Ω)

- Status of the inverter can be tested by measuring the R/L1, S/L2, T/L3, U/T1, V/T2, W/T3, RB, P / +2, N / -

Note:

- Before the inspection, measuring voltage DC bus between the legs of P / +2 and N / - to ensure the filter capacitor has discharged.

- Block BRD filter in the inverter power 22KW and smaller.

Block diagram of two rectifiers and inverters, as follows: 

IGBT


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