This paper presents a speed estimation method using neural networks (NN) in a vector controlled (VC) induction motor drive. The estimation algorithm is implemented using a Jordan recurrent NN structure where training of the NN is done online using back-propagation algorithm. Two back emf models are used in order to realize the reference and the adaptive models from which depending upon the spee...

This paper presents an efficient and robust control scheme of Fuzzy Logic Electronic Differential Controller (FLEDC) for sensorless drive based electric vehicle. The proposed system consists of two Brushless DC motors (BLDC) that ensure the drive of the two back driving wheels of an electric vehicle. Electronic differential controller (EDC) ensures the maximum torque and it can control both the...

Aiming at the problem that change of motor parameters in actual operation will significantly reduce control accuracy motor, this paper proposes a sensorless method permanent magnet synchronous based on an adaptive back-EMF observer. Firstly, vector algorithm, mathematical model coordinate axis transformation is established, online identification flux linkage, and back EMF observer constructed. ...

For sensorless control of surface-mounted permanent magnet synchronous machines (SPMSMs), the major issue is in zero- and low-speed ranges. Since back-electromotive force (EMF) proportional to speed, back-EMF based methods fail at zero low speed. A solution considering starting process speed presented. simplified fundamental model-based method proposed. Based on model, measured stator currents ...

To improve the sensorless control performance of electrical drive systems, a nonsingular terminal sliding mode observer (NTSMO) and adaptive are proposed to solve chattering phase delay problems. Firstly, by defining new surface, based on fast reaching law is designed estimate back electromotive force (EMF). The enhances robustness system eliminates singularity attenuates chattering. Next, obta...

This article investigates maximum possible torque improvement in a two-pole surface permanent magnet synchronous machine with reduced span, which causes production of highly nonsinusoidal back electromotive force (EMF). It contains high third and fifth harmonics, can be used for the enhancement, using stator current harmonic injection. Optimal span is studied first, it shown that such value, wo...

This article introduces a novel algorithm for suppression of phase current harmonics in three-phase sinusoidal surface-mounted permanent magnet synchronous machines (SPMSMs) caused by nonideal back EMF waveform and dead time effects. Proposed feedback acquisition chain obtains an exact information on all the relevant within each period fundamental. Design harmonic controller based internal mode...

Field oriented control (FOC) of Permanent Magnet Synchronous Motors (PMSM) is utilized in many industrial applications due to its high performance. Semiconductor manufacturers provide specialized solutions and tools for this technique. However, such are protected with closed source codes. This reduces the flexibility performance systems. paper presents conducted studies controller embedded soft...

Brushless DC (BLDC) motor drives are becoming more popular in industrial, traction applications. This makes the control of BLDC motor in all the four quadrants very vitalThe motor is operated in four steady state operating modes of torque-speed plane. To control a BLDC machine it is generally required to measure the speed and position of rotor by using the sensor because the inverter phases, ac...