shaneprasad
Member
Hi guys we having a bit of trouble with a 45 kw DC motor . The motor is controlled by a DC converter. The motor starts to heat up after about 2 hours and trips . The alarm displayed is ... motor overtemperature. We have checked the carbon brushes which are all ok. Also the three phase to the converter is ok . We have measured the current in all three phases which is 45 amp while running on load. We have checked the carbon brushes and cleaned the commutator and checked the blower motor and filter which is ok but still the motor is overheating .Also all the connections are tight. What could be the cause for overheating and what further tests do i need to do?