A Motor Module comprises a self-commutated inverter with IGBTs. It generates a variable voltage with variable frequency from the DC link voltage that feeds the connected motor.
Several Motor Modules can be interconnected through a common DC bus. This makes it possible to exchange energy between the Motor Modules. This means that if a Motor Module is in the generator mode, this energy can be used by another Motor Module operating in the motor mode.
Motor Modules are controlled by a Control Unit.
