Variable speed drive systems of brushless DC motors have been widely used for industry applications, home electric appliances, and so on, due to the progress of the power electronics, because of simple structure, easy maintenance, high efficiency, etc.. Moreover, because the brushless DC motor can realize the same high performance as DC motor, it is used in the fields where the high speed and h...

Utilization of multi-phase machines in variable speed drives is nowadays extensively considered for electric ship propulsion, ‘more-electric aircraft’ and traction applications, including EVs and HEVs. In addition to wellknown advantages, use of multi-phase machines enables independent control of a certain number of machines that are connected in series in an appropriate manner, with the supply...

in this paper coupled nonlinear equations of motion of a suspended cable with time dependent tension and velocity are derived by using hamilton’s principal. a modal analysis for a stationary sagged cable is initially carried out in order to identify the dynamic system. the natural solution is directed to compute the natural frequencies and mode shapes of the free vibration of a suspended cable....

Direct Torque Control (DTC) algorithm for induction motor drives gives fast transient response. The classical DTC algorithm utilizes a proportional integral (PI) speed controller to generate the reference torque value. Though this is quite effective, it is sensitive to parameter variation. To overcome this problem, this paper presents a fuzzy variable structure controller (FVSC), which improves...

in most industrial zones, electric energy is one of the most important energy sources. since electrical motors are the main energy consumers of industrial factories, consumption optimization in these motors can be considered as a main option related to energy saving. one very effective way to reduce the consumption of these equipment is to use a motor speed controllers or drives. since the loss...

A new speed control approach based on the Adaptive Neuro-Fuzzy Inference System (ANFIS) to a closed-loop, variable speed induction motor (IM) drive is proposed in this paper. ANFIS provides a nonlinear modeling of motor drive system and the motor speed can accurately track the reference signal. ANFIS has the advantages of employing expert knowledge from the fuzzy inference system and the learni...

Switched reluctance motor (SRM) drive has a remarkable characteristic, high efficiency, and good controllability, which makes it attractive for high-speed applications. In this paper, the basic control strategy for a switched reluctance motor drive circuit is explained and then three different resonant discharge topologies for SRM drive circuit are proposed. Due to resonantly discharging of exc...