Z-Source Inverter for Motor Drives Source Inverter for Motor Drives

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
Dpa Dpb Dpc
a
b
c
3-Ph
230 V
ac
Z-Source
L1
3-phase
Inverter
Line Voltage
vSa 230 V rms
Line Current
iSa
Ca Cb
C1
C2
M
Load Voltage
vLab after LC
230 V rms
Cc
Dna Dnb Dnc
0-any V ac
L2
310−350 V dc
Voltage Fed Z-Source inverter for ASD
Diode-Rectifier
Dpa Dpb Dpc
Z-Source
L1
C1
3-Ph
230 V
ac
Dna Dnb Dnc
3-phase
Inverter
C2
Load Current iLa
Inverter Current
Experimental waveforms under the nominal line
voltage of 230 Vac
M
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, [email protected], 517-336-4687