Hybrid Excitation Research Articles

Hybrid vibration testing for bridge modal system identification

Output-only system identification of a large post-tensioned concrete bridge using hybrid excitation was conducted. To boost ambient excitations, dynamic forcing applied by two light-weight electrodynamic shakers was adopted for hybrid testing. The bridge modal characteristics were identified using three output-only identification methods: auto-regressive time series model, eigensystem realization algorithm with observer/Kalman identification and data-driven stochastic subspace identification method. The accuracy and efficacy of the system identification algorithms when applied to hybrid dynamic responses were investigated and benchmarked against the results obtained from pure ambient vibration testing. More modes were identified from the hybrid excitation data compared to using only ambient vibrations. The study demonstrated that using output-only identification algorithms on vibration responses produced by hybrid excitations can be used for extracting more accurate and reliable modal parameters with enhanced accuracy and reliability for large-scale structures due to enhanced excitation energy and better coverage of relevant frequency bands.

A Hybrid Excitation Variable-leakage-flux Machine with Magnetic-bridge for Electric Vehicle

A Hybrid Excitation Variable-leakage-flux Machine with Magnetic-bridge for Electric Vehicle

Design and Analysis of a New Hybrid Excitation Vernier Motor with Reduced Permanent Magnet

Design and Analysis of a New Hybrid Excitation Vernier Motor with Reduced Permanent Magnet

A New Hybrid Excitation Flux Switching Motor Using Low Cost Ferrites with Flux Regulation Capability

A New Hybrid Excitation Flux Switching Motor Using Low Cost Ferrites with Flux Regulation Capability

Analysis of a Novel Hybrid Excitation Synchronous Generator with AC Field Winding

Analysis of a Novel Hybrid Excitation Synchronous Generator with AC Field Winding

Comparison and Analysis of the Consequent Pole Double Stator Hybrid Excitation Machine for Wide Speed Range Driving Applications

Comparison and Analysis of the Consequent Pole Double Stator Hybrid Excitation Machine for Wide Speed Range Driving Applications

Combined Regulation Performance Research of the Novel Flux-Torque Regulation Hybrid Excitation Machine with Axial-Radial Magnetic Circuit

Combined Regulation Performance Research of the Novel Flux-Torque Regulation Hybrid Excitation Machine with Axial-Radial Magnetic Circuit

Robust-Oriented Optimization Design of Dual Three-phase Slotted Permanent Magnet Hybrid Excitation Generator Considering Manufacturing Tolerances

Robust-Oriented Optimization Design of Dual Three-phase Slotted Permanent Magnet Hybrid Excitation Generator Considering Manufacturing Tolerances

Theoretical Analysis for Rapid Design of Hybrid Excitation Synchronous Machine With Consequent Pole Rotor

Theoretical Analysis for Rapid Design of Hybrid Excitation Synchronous Machine With Consequent Pole Rotor

Design and Optimization of Series-connected Hybrid Excitation Permanent Magnet Synchronous Motor

Design and Optimization of Series-connected Hybrid Excitation Permanent Magnet Synchronous Motor

Hybrid Excitation for a Wide Speed Range Linear Sinusoidal Area Variable Reluctance Resolver

Hybrid Excitation for a Wide Speed Range Linear Sinusoidal Area Variable Reluctance Resolver

Research advances in polaritonics based on near-field optical imaging technique

Polaritons, as hybrid excitations of light and matter, are important for miniaturizing the integrated nano-optoelectronic devices due to their capability of manipulating nanolight. Recently, the state-of-the-art nano-imaging technique (e.g. scattering-type scanning near-field optical microscope) has visualized various types of polaritons and revealed the physical mechanism behind them. The nanometer-resolution imaging not only deepens our understanding of fundamentals of polaritons but also promotes the studies of polariton manipulation and applications. In this review paper, we systematically summarize the recent near-field study of polaritons. Rather than other previous reviews focusing on polaritons in two-dimensional materials, our review extends the polaritonic systems to multiple dimensions (3D/2D/1D), at the same time we also collect the latest progress of polaritons in anisotropic systems. Moreover, we show the recent study of polariton manipulation and their corresponding applications, e.g. sub-diffractional imaging, focusing, optical modulator, nanostructure diagnosis and molecular sensing. Our review also look forward to future opportunities of polaritonics and its nanophotonic applications.

Research on Vibration and Noise Reduction of Tangential Magnetizing Parallel Structure Hybrid Excitation Synchronous Motor

Research on Vibration and Noise Reduction of Tangential Magnetizing Parallel Structure Hybrid Excitation Synchronous Motor

Multi-Objective Optimization Design of Hybrid Excitation Double Stator Permanent Magnet Synchronous Machine

Multi-Objective Optimization Design of Hybrid Excitation Double Stator Permanent Magnet Synchronous Machine

A method of reducing the cogging torque in a flux–torque regulation hybrid excitation machine with axial–radial magnetic circuit

A method of reducing the cogging torque in a flux–torque regulation hybrid excitation machine with axial–radial magnetic circuit

Underwater Radiated Noise Prediction Method of Cabin Structures under Hybrid Excitation

Aiming at the engineering limitations of traditional ship vibration online monitoring and noise prediction methods, this paper proposes a method for online monitoring and underwater radiation noise prediction of cabin structures’ vibration and noise under hybrid excitation of sound and force. The method first constructs the condition test model; based on OTPA technology, the “acoustic-vibration” transfer function between sound and vibration monitoring points in the cabin and the “acoustic/vibration-acoustic” transmission network inside and outside the cabin structure are obtained. Secondly, based on the “acoustic-vibration” transfer function, the online vibration and sound monitoring data are decoupled and processed to obtain the modified vibration and sound monitoring data. Finally, the near-field radiation noise on the conformal hologram surface outside the cabin is predicted based on the “acoustic/vibration-acoustic” transmission network, and the far-field radiation noise of the cabin structure is predicted by the wave superposition method. In this paper, the contribution law of external radiation noise and the coupling characteristics of the monitoring information under the hybrid excitation of sound and force are analyzed theoretically, and the decoupling method of coupling information is also studied. This method makes up for the problem of missing underwater radiation noise caused by sound excitation in traditional vibration monitoring, and it can effectively improve the prediction accuracy of underwater radiation noise. The effectiveness of the method is further verified by the tank model experiments.

Hybrid optimized-ANFIS based MPPT for hybrid microgrid using zebra optimization algorithm and artificial gorilla troops optimizer

This paper presents an effective hybrid renewable energy system. This system utilizes primary energy sources represented by both photovoltaic (PV) and wind energy conversion system (WECS). In addition, integrating the battery energy storage system (BESS), the hydrogen energy storage system (HESS), and the supercapacitor energy storage system (SESS), as backup sources which providing reliable simultaneous power supply and loading. A new design for a wind energy conversion system based on a hybrid excitation permanent magnet synchronous generator (HEPMSG) is proposed, and then artificial intelligence strategies are utilized to determine the optimal flow of energy when the system is operating immediately. Moreover, new hybrid maximum power point tracking (MPPT) techniques have been proposed including zebra optimization algorithm (ZOA)-ANFIS-based MPPT and gorilla troops optimizer (GTO)-ANFIS-based MPPT to obtain the maximum power of solar panels and wind turbines, which leads to enhancing the performance of these energy sources. The implemented power flow management (PFM) model is designed by MATLAB/Simulink, considering three various operating cases to evaluate the performance and effectiveness of various backup system configurations under different operating scenarios. According to the results, power can be generated, and load requirements can be efficiently met by applying the proposed PFM strategy, and this leads to the system operating at optimal performance. When comparing two optimization techniques, it will become clear that both give robust performance, but ZOA technique significantly outperforms the GTO technique in the computation time (26.17 % reduction) for the photovoltaic system. On the other hand, in the case of the wind energy conversion system, the ZOA technique achieves a significant reduction in calculation time by 35.5 %. The ZOA technique achieves computation times of 1616.80 s and 672.43 s for the photovoltaic and wind energy conversion system, respectively.

A Brushless Hybrid Excited Motor Based on Field Modulation Theory

This paper proposes a novel brushless hybrid excited (HE) motor, in which both armature and field windings are located on the stator, and PMs are housed on the rotor. The key difference is that a special consequent-pole rotor structure is adopted, in which each two PMs is separated by a rotor tooth. So, when DC current is fed into the field winding, the produced stationary wound field can be modulated by the rotor teeth to generate rotary wound field harmonics. Thus, an effective HE operation can be achieved due to the interaction between the synchronous rotating PM field and the wound field harmonics. The motor configuration is introduced firstly. Then the operating principle is discussed by the magnetic field modulation theory. By finite element analysis, the electromagnetic performances are calculated and analyzed. The results verify the validity of theoretical analysis.

A Novel Consequent-Pole Contra-Rotating Machine With Zero-Sequence Current Excitation

A novel hybrid excitation consequent-pole contra-rotating machine with zero-sequence current excitation is presented in this paper. The stator windings carry both the DC field winding current and the AC armature current, making the machine more compact. Further, the flux can be weakened or enhanced without the risk of demagnetization by controlling the zero-sequence current excitation in the integrated winding. Finally, the segmented stator can effectively reduce iron loss and simplify the manufacture processing.

Armature Reaction Analysis and Performance Optimization of Hybrid Excitation Starter Generator for Electric Vehicle Range Extender

The armature reaction of the hybrid excitation starter generator (HESG) under load conditions will affect the distribution of the main magnetic field and the output performance. However, using the conventional field-circuit combination method to study the armature reaction has the problem of low accuracy and inaccurate influencing factors. Therefore, this paper proposed a graphical method to analyze the armature reaction and a new type of HESG with a combined-pole permanent magnet (PM) rotor and claw-pole electromagnetic rotor. The analytical formula of the voltage regulation rate under the armature reaction was derived using the graphical method. The main influencing parameters of the armature reaction magnetic field (ARMF) were analyzed, and the overall output performance was analyzed using finite element software. On this basis, comparison analyses before and after optimization and the prototype test were carried out. The results show that the direct-axis armature reaction reactance, quadrature-axis armature reaction reactance, and voltage regulation rate of the optimized HESG were significantly reduced, the output voltage range of the whole machine was wide, and the voltage regulation performance was good.