| Abstract |
The losses of an inverter-fed sinusoidal-field synchronous
servo drive at a given load and speed depend on the
improvement of the material and construction of the machine,
the converter topology, the characteristics of semiconductor
power switches, the drive control system and the inverter control
(modulation) algorithm. Significant component of overall drive
losses are the switching losses of voltage source inverters. Based
on MATLAB-simulation result the switching losses of different
inverter control methods are compared in steady-state at different
load torque and various rotor speeds. Hysteresis, spacevector,
predictive current control and vector sliding mode control
methods were examined, compared and simulated. It is shown
that the carrier based PWM control produces lower switching
losses than other investigated control, but for higher speed the
predictive and the vector sliding mode control methods approach
PWM switching losses. It also turns out that switching losses
less depend on the load of the motor. According to an other
investigation very similar results are known for induction motor
drives. |
