Z-source inverter for motor drives done

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					                                Z-Source Inverter for Motor Drives

Objective:
To develop a reliable inverter for motor drives with ride through ability and improved input power factor.

Features:                                                                           10kW Z-Source Inverter Prototype
        Able to produce any desired output ac voltage, even
        greater than the line voltage, regardless of the
        input voltage, thus reducing motor ratings
        Able to provide ride-through during voltage sags
        without any additional energy storage elements
        Immunity to EMI noise greatly increases reliability
        Improves power factor and reduces harmonic current
        and common-mode voltage.
Application Examples:
        Adjustable Speed Drives

             Diode-Rectifier         Z-Source             3-phase
                                        L1                Inverter                                               Line Voltage
                    Dpa Dpb Dpc                                                                                  vSa 230 V rms

                       Ca Cb                                                                                     Line Current
              a                                                                                                  iSa
              b                       C1           C2                        M
              c
                                                                                                                 Load Voltage
                                                                                                                 vLab after LC
3-Ph                   Cc
                                                                                                                 230 V rms
230 V                Dna Dnb Dnc
ac                                            L2                      0-any V ac                                 Load Current iLa
                                                                                                                 Inverter Current
                                    310−350 V dc

        Voltage Fed Z-Source inverter for ASD                                 Experimental waveforms under the nominal line
           Diode-Rectifier          Z-Source            3-phase                            voltage of 230 Vac
                                       L1               Inverter
                  Dpa Dpb Dpc



                                    C1         C2                             M

3-Ph
230 V             Dna Dnb Dnc
ac                                       L2                            0-any V ac
                                   310−350 Vdc

     Current Fed Z-Source inverter for ASD
                                                                             Experimental waveforms under 50 % voltage sag
                                                                            Power Electronics and Motor Drives Laboratory
                                                                   Contact Info: Fang Z. Peng, fzpeng@egr.msu.edu, 517-336-4687