SPRACO3 October 2019 INA240 , LMG5200 , TMS320F280021 , TMS320F280021-Q1 , TMS320F280023 , TMS320F280023-Q1 , TMS320F280023C , TMS320F280025 , TMS320F280025-Q1 , TMS320F280025C , TMS320F280025C-Q1 , TMS320F280040-Q1 , TMS320F280040C-Q1 , TMS320F280041 , TMS320F280041-Q1 , TMS320F280041C , TMS320F280041C-Q1 , TMS320F280045 , TMS320F280048-Q1 , TMS320F280048C-Q1 , TMS320F280049 , TMS320F280049-Q1 , TMS320F280049C , TMS320F280049C-Q1 , TMS320F28374D , TMS320F28374S , TMS320F28375D , TMS320F28375S , TMS320F28375S-Q1 , TMS320F28376D , TMS320F28376S , TMS320F28377D , TMS320F28377D-EP , TMS320F28377D-Q1 , TMS320F28377S , TMS320F28377S-Q1 , TMS320F28378D , TMS320F28378S , TMS320F28379D , TMS320F28379D-Q1 , TMS320F28379S
Testing both motors at the same time with a coupled shaft, as shown in Figure 8, leads to chaotic behavior. If the assembly is already made, then it is better to test only one motor at a given time. Turn off DC bus voltage before connecting or disconnecting motor 1 or 2 to INV1 or INV2. To test motor 1, connect motor 1 power terminals to INV1 while keeping motor 2 terminals disconnected and safely insulated from each other. This is to avoid any short circuit between motor 2 phases whenever the shaft spins. Once motor 1 / INV1 test is complete, disconnect motor 1 from INV1 and keep its terminals safely insulated from each other. Then connect motor 2 terminals to INV2 for motor 2/ INV2 tests.
If the motor shafts are disengaged, then both motors can be connected to INV1 and INV2 and tested simultaneously. This operation is required in subsequent build levels.