This paper describes a simple way to control the Brush Less DC Motor (BLDCM) for electrical applications. To control this machine it is generally required to measure the speed and position of rotor by using the sensor because the inverter phases, acting at any time, must be commutated depending on the rotor position. The position sensors make the motor system more complicated and mechanically u...

Conventionally, BLDC motors are commutated in six-step pattern with commutation controlled by position sensors. To reduce cost and complexity of the drive system, sensorless drive is preferred. The existing sensorless control scheme with the conventional back EMF sensing based on motor neutral voltage for BLDC has certain drawbacks, which limit its applications. This paper presents the dynamic ...

Abstract: A novel modular arc-linear flux-switching permanent-magnet motor (MAL-FSPM) used for scanning system instead of reduction gearboxes and kinematic mechanisms is proposed and researched in this paper by the finite element method (FEM). The MAL-FSPM combines characteristics of flux-switching permanent-magnet motor and linear motor and can realize the direct driving and limited angular mo...

In this paper, the torque ripple of consequent-pole PM machines (CPPMMs) is reduced by injecting 2nd order harmonic armature current. into stator coils. proposed method, based on machine back-emf spectrum and main load current, appropriate current obtained. An analytical model developed to obtain CPPMMs. addition, obtained used compute electromagnetic as a function currents. Validity verified u...

Recently, the dual-permanent-magnet-excited (DPME) machine has attracted growing attention due to its high torque density. Due bidirectional field modulated effect (BFME), airgap flux density harmonics (AFDHs) are more complex and abundant than traditional permanent magnet synchronous machines (PMSMs). Moreover, back-electromotive force (EMF) generated by AFDHs is also complex. Unfortunately, o...

The paper presents a detailed calculation of characteristic of five different topology permanent magnet machines for high performance traction including hybrid -electric vehicles using finite element analysis (FEA) method. These machines include V-shape single layer interior PM, W-shape single-layer interior PM, Segment interior PM and surface PM on the rotor and with distributed winding on the...

To address such challenges as an uncertain number of demagnetization poles the permanent magnet synchronous motor (PMSM) and cases in which fault cannot be located, this paper proposes a identification location methodology based on analysis stator current. First, influence irreversible magnets analytical model back electromotive force (Back-EMF) rotor single slot is analyzed. Moreover, consider...

With the increasing use of electric propulsion ships, emergence shaftless rim-driven thruster (RDT) as a revolutionary integrated motor is gradually becoming an important development direction for green ships. The structure RDTs leads to their dependence on position sensorless control techniques. In this study, novel algorithm using composite sliding mode observer (SMO) with modified feed-forwa...

Short Abstract—A simplified inverse class F power amplifier (PA) with a voltage second harmonic peaking and third harmonic short operating at 2.14GHz for WCDMA base station applications has been developed. The load network is based on transmission line harmonic traps and provides high impedance at the second and low impedance at the third harmonic to the PA. The PA uses a packaged Silicon LDMOS...