Modern solid-state electronic circuits drive brushless DC motors with AC waveforms generated from a DC source. The brushless DC motor, actually an AC motor, is replacing the conventional brushed DC motor in many applications. And, the stepper motor, a digital version of the motor, is driven by...
It discusses the uses of DC powered motors as the mainstay of locomotive power for the first 80 years. Also talks about the technical advances that allowed for the industry to advance to a more efficient AC motor with the invention of such semiconductor devices as the diode and GTO's. ...
AC and DC motor design follows respective generator design principles very closely. Atransformeris a pair of mutually-inductive coils used to convey AC power from one coil to the other. Often, the number of turns in each coil is set to create a voltage increase or decrease from the powered...
Unlike in a DC motor, where you send power to the inner rotor, in an AC motor you send power to the outer coils that make up the stator. The coils are energized in pairs, in sequence, producing a magnetic field that rotates around the outside of the motor....
This work proposes a new three-phase multipulse rectifier based on the delta autotransformer connection with DC-DC Boost stages and constant hysteresis control which has the objective of providing a reliable DC bus for on-board applications, electric motor drives and similars, always considering power...
The interleaving of modules in AC/DC switch mode power supply designs has been extended to the Cuk converter. The suitability of this topology has been compared with that of a more established boost converter. Simulation results have been used to determine whether the greater complexity of the Cu...
Somewhere in most engineering educations, there’s a class on induction motors. Students learn about shaded-pole motors, two-phase and three-phase motors, squirrel cage motors, and DC-excited motors. It’s a pre-requisite for then learning about motor controllers and so-called brushless DC mot...
Applying Reduced General Direct Space Vector Modulation Approach of AC–AC Matrix Converter Theory to Achieve Direct Power Factor Controlled Three-Phase AC... This paper presents a novel approach to achieve both tight dc voltage regulation and direct power factor control by applying general direct spa...
AC and DC motors are an important equipment to convert the electrical energy to mechanical energy. Variable-speed drive system is the main project of the "power electronics." Although digital control theory has been applied in all motor drive systems for a long time, unfortunately the converters...
— A new power factor correction scheme based on ac to dc flyback converter fed PMDC motor is presented in this paper. In the proposed circuit, the efficiency and power factor is improved by using an auxiliary (third) winding coupled to ... M Kannan,G Neelakrishnan,S Selvaraju 被引量:...