| dc.description.abstract | Permanent magnet (PM) electrical machines have been widely adopted in
industrial applications due to their advantages such as easy to control, compact in size,
low in power loss, and fast in response, to name only a few. Contemporary control
methods specifically designed for the control of PM electrical machines only focus on
controlling their time-domain behaviors while completely ignored their frequency-domain
characteristics. Hence, when a PM electrical machine is highly nonlinear, none of them
performs well.
To make up for the drawback and hence improve the performance of PM electrical
machines under high nonlinearity, the novel nonlinear time-frequency control concept is
adopted to develop viable nonlinear control schemes for PM electrical machines. In this
research, three nonlinear time-frequency control schemes are developed for the speed and
position control of PM brushed DC motors, speed and position control of PM synchronous
motors, and chaos suppression of PM synchronous motors, respectively. The most
significant feature of the demonstrated control schemes are their ability in generating a
proper control effort that controls the system response in both the time and frequency
domains. Simulation and experiment results have verified the effectiveness and superiority
of the presented control schemes. The nonlinear time-frequency control scheme is
therefore believed to be suitable for PM electrical machine control and is expected to have
a positive impact on the broader application of PM electrical machines. | en |
