Pair synchronous machines fed by single inverter

This study tries to find a way to make run two parallel synchronous motors with a single inverter. The research has been done on train’s motors. At the beginning we thought only on mechanical solutions which might be useful as well, but they are some limitation like space and they are quite expensive. Then by finding electrical solutions, advantages of mechanical solutions are not any more brilliant. an electrical solution does not need to space and it does not need to material, so it is economic and on the other hand can satisfy the targets. on the classical ways, inverter inputs the angle of the motor and outputs a vector voltage by the same rotor’s position considering a phase-difference. But this law is broken in this thesis and inverter does not apply a voltage respect to one motor and it has under control both of motors. to control them there could be many strategies, but in this study I tried two possibilities. The first one the angular position of the motor in back and the second one the average angular positions of both motors. The second try was effective; however there might be other strategies which have a higher stability. As s suggestion the fraction ratio of deference of two motors’ angular positions as inverter’s reference could be efficacious.

questa tesi si occupa di controllare due motori sincroni di un carrello del treno attraverso un inverter solo