In this paper, universal motor speed control system with a PWM AC chopper is introduced. Operation principles of the control system, which is realized with a microcontroller, are presented. Mathematical model of the universal motor and PWM AC chopper is derived and the behavior of the system is studied by simulation. Mains power factor, motor speed, and current are analyzed for different load c...

The cortical dorsal auditory stream has been proposed to mediate mapping between auditory and articulatory-motor representations in speech processing. Whether this sensorimotor integration contributes to speech perception remains an open question. Here, magnetoencephalography was used to examine connectivity between auditory and motor areas while subjects were performing a sensorimotor task inv...

In this paper, a new field oriented control scheme with maximum torque for permanent magnet hysteresis synchronous (PMHS) motor has been presented. Vector control method provides significant improvement to the dynamic performance of ac motors but in this method d- axis current is controlled such as the ratio of motor torque to motor current is a maximum, then the dynamic performance will be ver...

To improve the performance of motor drives, there is a need to improve the quality and reliability of the drive system. With the high power handling capability of the switching device, pulse width modulated AC chopper can be used in high power applications. AC chopper using pulse width modulation provides substantial advantages over conventional line commutated AC controllers. To alleviate the ...

A successful return in tennis requires a tennis player first to determine where best to place her return and then to correctly execute her swing. If she makes an errant return, she now faces a credit assignment problem: Should this negative outcome be attributed to poor shot selection or to an error in motor execution? McDougle et al. propose a solution to this problem when the source of the er...

General power system supply only provides a fixed voltage and frequency, and its the inverter is mostly used to control AC motor speed with different frequencies. However, it normally requires a rectified DC into AC for the frequency variation. In this study, a digital signal processing technology is developed to generate a Sine Wave Pulse Width Modulation (SPWM) signal to replace the tradition...

This paper proposes a three phase transformerless AC/AC converter which can perform both buck and boost operations based on the voltage requirements. This AC/AC converter is mainly proposed for the three phase induction motor drives with the intention to reduce the high inrush current of the conventional motor used in industrial applications. The merits of the proposed AC/AC converter can be un...

The current control is an important issue in power electronic circuits, particulary in dc to ac inverters which are used in ac motor drives and continuous ac power supplies where the objective is to produce a sinusoidal ac output whose magnitude and frequency can both be controlled. In this paper, the current control of three-phase pulse width modulated voltage source inverter (PWM-VSI) has bee...

This work deals with parameter identification of permanent magnet motors, a class of ac motor which is particularly important in industrial automation due to characteristics like applications high performance, are very attractive for applications with limited space and reducing the need to eliminate because they have reduced size and volume and can operate in a wide speed range, without indepen...

In this paper, several aspects of high frequency related issues of modern AC motor drive systems, such as common mode voltage, shaft voltage and resultant bearing current and leakage currents, have been discussed. Conducted emission is a major problem in modern motor drives that produce undesirable effects on electronic devices. In modern power electronic systems, increasing power density and d...