Position Sensorless Control for Doubly Salient Electromagnetic Machine With Improved Startup Performance

IEEE Trans. Energy Convers.

Wang

Niu

et al. 2022

DC-Excited vernier reluctance machine (DC-VRM) using a 12-slot/10-pole-pair design, exhibits the advantages of small torque ripple and low cogging torque due to the inherent commentary characteristic. However, the inherent saliency is canceled out by a 12/10 pole combination of machine design driven by a traditional three-phase inverter. As a result, the sensorless operation in zero/low-speed regions becomes difficult because the position estimation methods using self-inductance detection cannot be applied. To tackle this problem, we first analyzed the saliency annihilation phenomenon through Fourier analysis that the odd-order harmonics in self-inductance are canceled. Moreover, reconstructing saliency method is proposed by splitting a phase winding into two sub-phase coils and using parallel Hbridge converters to supply sub-phase coils and achieve sensorless drive. Through this method, the saliency effect is recovered in selfinductance, thereby pulse injection sensorless drive can be applied. The constructed 12/10 DC-VRM sensorless drive shows good faulttolerant ability and can be applied in safety-critical industry applications such as aerospace propulsion. Analysis and experiments are performed in the initial position detection, startup and free-running stages to verify the feasibility of the proposed solution. A sector estimation accurate to 6° can be achieved.

Section: Introductionmentioning

confidence: 99%

Reconstructing Saliency Effect in 12/10 DC Vernier Reluctance Machine for Position-Sensorless Drive Aerospace Starter Generator Application

IEEE Trans. Energy Convers.

Wang

Niu

et al. 2022

“…The current research on WFDSMs is mainly divided into three areas: topology design, starter/generator (S/G) and position sensorless control [10]- [19]. In [11], a twosection twisted-rotor structure for WFDSM was proposed to decrease output voltage ripple significantly.…”

Section: Introductionmentioning

confidence: 99%

“…In [18], the negative-going zero-crossing points of the line-to-line field flux linkage were utilized for the detection of the position and speed of the rotor. In [19], based on a self-inductance rectangle, a highly accurate position senseless control strategy without negative torque was proposed.…”

Section: Introductionmentioning

confidence: 99%

Comparative Research on Four-Phase Dual Armature-Winding Wound-Field Doubly Salient Generator With Distributed Field Magnetomotive Forces for High-Reliability Application

Teng

et al. 2021

IEEE Access

In this article, a four-phase dual armature-winding wound-field doubly salient machine with distributed field magnetomotive forces (DAW-WFDSM-DF) and corresponding double-redundant rectifier circuit are proposed to improve the electromagnetic performance of the traditional WFDSM in terms of the output voltage ripple, fault-tolerant capability and output capability. Firstly, due to the uniformly distributed field magnetomotive forces of the proposed machine, the more feasible stator/rotor pole combinations of the four-phase machine can be obtained and the influence of stator/rotor-pole combination on electromagnetic performance is investigated, especially for the fault-tolerant capability. Based on a multi-objective evaluation function including output capability, fault-tolerant capability and unbalanced magnetic forces, the 4N-stator-pole/3N-rotor-pole (4N /3N) and 4N /5N combinations are recommended. Then, considering that the fault-tolerant capability of 8/6-pole machine is poorer than that of 12/9-pole one, the 12/9-pole and 8/10-pole DAW-WFDSM-DFs are comparatively researched for taking as the representatives of 4N /3N and 4N /5N , including no-load and on-load characteristics and fault-tolerance performance under single winding open-circuit condition. Finally, as the 8/10-pole DAW-WFDSM-DF exhibits remarkably higher efficiency and stronger fault-tolerant capability than the 12/9-pole one, an 8/10-pole prototype is manufactured and tested to verify the analytical results. INDEX TERMS Fault-tolerant capability, stator/rotor pole combination, dual armature-winding, wound field doubly salient generator, distributed field magnetomotive forces, electromagnetic performance.

“…In recent years, EEDSVRM have attracted increasing attention and become one of the research highlights in the machine field. In [6][7][8][9][10][11][12], the control strategy research for EEDSVRM is proposed. Traditional position sensors have many inherent disadvantages, such as increasing the cost of the drive system and reducing the robustness of the machine.…”

Section: Introductionmentioning

confidence: 99%

“…Traditional position sensors have many inherent disadvantages, such as increasing the cost of the drive system and reducing the robustness of the machine. In order to improve the overall stability of the WFDSM, a position sensorless control strategy that adopts the relationship between the machine's self-inductance and the rotor position to estimate the rotor position is applied to the WFDSM [6,7]. Aiming at the problem of large torque ripple that is inherent in VRM, an instantaneous torque control strategy incorporating the adaptive terminal sliding mode to suppress SRM torque ripple is proposed [8,9].…”

Section: Introductionmentioning

confidence: 99%

Overview of the Optimal Design of the Electrically Excited Doubly Salient Variable Reluctance Machine

et al. 2021

Energies

The Electrically Excited Doubly Salient Variable Reluctance Machine (EEDSVRM) is a new type of brushless machine designed according to the principle of air gap reluctance change. There is neither permanent magnet steel nor excitation winding on the rotor. The rotor is made of silicon steel sheets, thus the structure of the variable reluctance machine is very simple. There are many optimization methods for this type of machine optimal design, such as novel machine topology optimization, finite element simulation-based optimization, mathematical analysis-based optimization, intelligent algorithm-based optimization, and multiple fusion-based optimization. Firstly, this article introduces the basic structure and working principle of the EEDSVRM and analyzes both its common regularity and individual difference. Then, the different optimization design methods of EEDSVRM are reviewed, the advantages and disadvantages of the different optimization methods are summarized, and the research interests of the optimization design of variable reluctance machines in the future are prospected.