| Abstract |
The paper presents event-driven approach to design,
simulation and implementation of integrated current control,
protection and monitoring functions for three-phase inverter-fed
motor. The direct current controller determines the inverter
switch state from the current error information with no additional
controller and modulator. The drive protection and monitoring is
based on the observation of logical control and drive operation
critical signals such as heat-sink temperature, DC-link voltage
and maximum current.
To describe such combination of time and event-driven
functionality, drive is considered as discrete-event driven system,
which enables a more systematic insight to the control design. A
new matrix based approach to the modeling of discrete event
systems. Modeling of the structure of discrete event-driven system
is based on matrix representation of Petri Nets. The discrete
dynamics of such a system is described by transferring the system
among its specific discrete states, which is denoted using a
combination of algebraic and logic equations.
To confirm the proposed approach, simulation and experimental
results are presented. The proposed algorithm was implemented
on FPGA, which is considered as an alternative to the DSP based
implementation. Furthermore, some benefits of the FPGA based
implementation are presented. |
