DSP based space vector PWM pattern generators for current source rectifiers and inverters

Current source converters are usually modulated using off-line pattern generators, due to the complex requirements of the switch gating signals. However, on-line patterns (carrier and space vector based) offer a number of control advantages, such as: tracking error minimization, zero steady state error, and potential implementation of enhanced control strategies. With the ability of microprocessors and DSP, the space vector modulation offers an interesting alternative to standard carrier based modulation techniques. The paper addresses practical issues such as switching frequency minimization, parasitic harmonic reduction, and delay compensation. A unity power factor buck rectifier is simulated to validate the proposed algorithm