文档介绍：Brushless DC motor drives supplied by PV power system based on Z-source
inverter and FL-IC MPPT controller
. Mozaffari Niapour ⇑, S. Danyali, . Sharifian, . Feyzi
Faculty of Electrical puter Engineering, University of Tabriz, 51664 Tabriz, Iran
a r t i c l e i n f o
Article history:
Received 5 April 2010
Received in revised form 15 February 2011
Accepted 16 April 2011
Available online 19 May 2011
Keywords:
Photovoltaic
Z-source inverter
Maximum power point tracker
Fuzzy logic
Brushless DC motor
Direct torque control
PSO
Water pumping system
a b s t r a c t
This paper discusses operation performance of a water pumping system consist of a brushless dc (BLDC)
motor coupled a centrifugal pump and panying a Z-source inverter (ZSI) fed by a photovoltaic (PV)
array, to be improved. Despite conventional double-stage power converters, this paper proposes utilizing
a single-stage ZSI to extract the maximum power of the PV array and supply the BLDC motor simultaneously.
Utilizing the ZSI provides some inherent advantages such as high efficiency and low cost, which
is very promising for PV systems due to its novel voltage buck/boost capability. In addition, in order to
precisely perform the maximum power point tracking (MPPT) of the PV array the fuzzy logic-incremental
conductance (FL-IC) MPPT scheme is proposed. The proposed FL-IC MPPT scheme provides enough modification
to the conventional IC method to enjoy an appropriate variable step size MPPT control signal for
the ZSI. Moreover, direct torque control (DTC) is found more effective parison with hysteresis current
control with current shaping to drive the BLDC motor, because it benefits from faster torque
response, reduced torque ripple, less sensitivity to parameters variations, and simple implementation.
In the mean time, due to the frequently variations of the PV power generation; delivered mechanical
power to the centrifugal pump is variable. Thus, the BLDC motor should be