Cunxiang Yang
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View article: Inter-turn short-circuit fault diagnosis of high-voltage line-start permanent magnet synchronous motor based on improved wavelet packet energy analysis
Inter-turn short-circuit fault diagnosis of high-voltage line-start permanent magnet synchronous motor based on improved wavelet packet energy analysis Open
High-voltage line-start permanent magnet synchronous motors (HVLSPMSMs) are prone to inter-turn short-circuit faults, which not only result in a significant increase in current but also exacerbate motor vibration. To accurately identify th…
View article: Influence of harmonic voltage on the electromagnetic performance of 10 kV, 1000 kW induction motor
Influence of harmonic voltage on the electromagnetic performance of 10 kV, 1000 kW induction motor Open
The impulse current caused by the direct starting of the high voltage induction motor (HVIM) adversely affects both the electromagnetic performance of the motor and the power grid. The soft starting technology of machines by inverter emerg…
View article: Study on the influence of three-phase voltage unbalance on electromagnetic performance and vibration of high-voltage line-start permanent magnet synchronous motor
Study on the influence of three-phase voltage unbalance on electromagnetic performance and vibration of high-voltage line-start permanent magnet synchronous motor Open
Since the operation of the high-voltage line-start permanent magnet synchronous motor (HVLSPMSM) does not need the control circuit and is directly powered by the grid, its operating stability is easily affected by the three-phase voltage u…
View article: Research on the Influence of Multi‐Harmonic Magnetic Field on the Stability of the Radial Suspension Force and Electromagnetic Torque of Bearingless Motors
Research on the Influence of Multi‐Harmonic Magnetic Field on the Stability of the Radial Suspension Force and Electromagnetic Torque of Bearingless Motors Open
Bearingless motors can realise the rotor active suspension by the radial electromagnetic force, whereas the suspension force and torque ripple will increase the difficulty of motor control, which may lead to the stator and rotor collision …
View article: Multi-Physics Analysis of Electromagnetic, Vibration, and Temperature Fields for Short-Circuit Faults in GHSPMG
Multi-Physics Analysis of Electromagnetic, Vibration, and Temperature Fields for Short-Circuit Faults in GHSPMG Open
The Gramme-Ring -winding high-speed permanent magnet generators (GHSPMG) are the most attractive candidates for use as the emergency power supply due to its inherent high efficiency and high power density. Studying the inter-turn short cir…
View article: Analytical Calculation of Magnetic Field and Analysis of Rotor Permeability Effects on Permanent Magnet Synchronous Motor with Fractional Slot Concentrated Winding
Analytical Calculation of Magnetic Field and Analysis of Rotor Permeability Effects on Permanent Magnet Synchronous Motor with Fractional Slot Concentrated Winding Open
Accurate calculation of the flux and the magnetic field distribution of fractional slot concentrated winding permanent magnet synchronous motor (FSCW PMSM) is the basis for motor performance analysis, and rapid calculation is key. In this …
View article: Analysis of low saliency ratio and torque characteristics of the fractional slot concentrated winding surface mounted motors
Analysis of low saliency ratio and torque characteristics of the fractional slot concentrated winding surface mounted motors Open
In recent years, fractional slot concentrated winding permanent magnet synchronous motors (FSCW PMSMs) have become a hotspot in the research field. Due to the unique inductance characteristics of the FSCW PMSM, a fast and accurate calculat…
View article: 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 Open
In order to solve the problem of insufficient torque for flux weakening in permanent magnet machines, a novel flux-torque regulation hybrid excitation machine with axial-radial magnetic circuit (FTRHEM) is proposed. To solve the problem th…
View article: Temperature Field Analysis of Oil-Cooled Heat Dissipation in High-Speed Permanent Magnet Synchronous Motor
Temperature Field Analysis of Oil-Cooled Heat Dissipation in High-Speed Permanent Magnet Synchronous Motor Open
With the development of high-speed permanent magnet synchronous motors (PMSM), the requirements for speed are getting higher and higher, and the power density increase is getting bigger and bigger. However, too high a loss density will cau…
View article: Operating principle and performance analysis of a novel flux–torque regulation hybrid excitation machine with axial–radial magnetic circuit using magnetic network
Operating principle and performance analysis of a novel flux–torque regulation hybrid excitation machine with axial–radial magnetic circuit using magnetic network Open
In order to solve the problem of the decreasing torque density caused by the complex structure of the hybrid excitation machine, a novel flux–torque regulation hybrid excitation machine with axial–radial magnetic circuit is proposed by the…
View article: Research on magnetic regulation characteristics of axial-radial flux type permanent magnet synchronous machine
Research on magnetic regulation characteristics of axial-radial flux type permanent magnet synchronous machine Open
Due to the fixed rotor magnetic field, the main magnetic flux of conventional permanent magnet synchronous motors (PMSMs) cannot be flexibly adjusted. Recently, the axial-radial flux type permanent magnet synchronous machine (ARFTPMSM) bas…
View article: An Analytical Method for Calculating the Cogging Torque of a Consequent Pole Hybrid Excitation Synchronous Machine Based on Spatial 3D Field Simplification
An Analytical Method for Calculating the Cogging Torque of a Consequent Pole Hybrid Excitation Synchronous Machine Based on Spatial 3D Field Simplification Open
Consequent pole hybrid excitation synchronous (CPHES) machines have the advantage of symmetrical bidirectional magnetomotive force increments. Compared with a traditional hybrid excitation motor (HEM), a CPHES machine improves the disadvan…
View article: Influence of Eddy Current Loss on Electromagnetic Field and Temperature Field of High-Speed Permanent Magnet Generator With the Toroidal Windings
Influence of Eddy Current Loss on Electromagnetic Field and Temperature Field of High-Speed Permanent Magnet Generator With the Toroidal Windings Open
The toroidal windings can shorten the axial length of the machine, so it is widely used in high-speed permanent magnet machine. However, under high-frequency operation, the magnetic flux leakage generated by the toroidal windings can cause…
View article: Analysis of Turn-to-Turn Fault on Split-Winding Transformer Using Coupled Field-Circuit Approach
Analysis of Turn-to-Turn Fault on Split-Winding Transformer Using Coupled Field-Circuit Approach Open
The turn-to-turn faults (TTF) are also inevitable in split-winding transformers. The distorted leakage field generated by the TTF current results in large axial forces and end thrusts in the fault windings as well as affecting other branch…
View article: Comparison of rare‐earth and hybrid‐magnet mover configurations for a permanent magnet synchronous linear motor
Comparison of rare‐earth and hybrid‐magnet mover configurations for a permanent magnet synchronous linear motor Open
Force ripple and cost reduction are two of the main challenges in optimising the design and increasing the market uptake of permanent magnet synchronous linear motors (PMSLM). Two mover configurations are compared in depth; one made entire…
View article: Two-stage Control Strategy for UHVDC Voltage based on Bifurcation Trajectory Sensitivity
Two-stage Control Strategy for UHVDC Voltage based on Bifurcation Trajectory Sensitivity Open
In order to solve the voltage bifurcation phenomenon caused by the continuous change of the load on the UHV grid receiving end system, this paper proposes a two-stage control strategy based on the bifurcation trajectory sensitivity. Firstl…
View article: Performance analysis and comparison of PMSM with concentrated winding and distributed winding
Performance analysis and comparison of PMSM with concentrated winding and distributed winding Open
The concentrated winding (CW) is obviously different from the traditional distributed winding (DW) in the arrangement of windings and the calculation of winding factors, which will inevitably lead to different performances of the permanent…
View article: ROTOR STRUCTURE WITH DOUBLE CAGE FOR IMPROVED SYNCHRONOUS CAPABILITY OF LINE-START PERMANENT MAGNET SYNCHRONOUS MOTORS
ROTOR STRUCTURE WITH DOUBLE CAGE FOR IMPROVED SYNCHRONOUS CAPABILITY OF LINE-START PERMANENT MAGNET SYNCHRONOUS MOTORS Open
Line start permanent magnet synchronous motors (LSPMSMs) have a problem of synchronization. In this paper the rotor of LSPMSM with double cage is proposed to improve synchronous capability of the motor. Key factors concerning the starting …
View article: Coordination and Optimization Strategy of LCC-HVDC Auxiliary Power/Frequency Combination Control
Coordination and Optimization Strategy of LCC-HVDC Auxiliary Power/Frequency Combination Control Open
HVDC auxiliary emergency control can improve the transient stability of the AC/DC interconnected power grid. A coordination and optimization strategy of multi-infeed HVDC auxiliary power/frequency combination control is proposed in this pa…
View article: METHOD FOR CALCULATION OF NO-LOAD BACK EMF OF HIGH VOLTAGE LINE-START PERMANENT MAGNET SYNCHRONOUS MOTOR
METHOD FOR CALCULATION OF NO-LOAD BACK EMF OF HIGH VOLTAGE LINE-START PERMANENT MAGNET SYNCHRONOUS MOTOR Open
When the finite element method is used to calculate the no-load back EMF of the high voltage line-start permanent magnet synchronous motor (HV-LS-PMSM), choosing the actual length and effective length of the stator core will cause differen…
View article: The Influence of Stator Winding Turns on the Steady-State Performances of Line-Start Permanent Magnet Synchronous Motors
The Influence of Stator Winding Turns on the Steady-State Performances of Line-Start Permanent Magnet Synchronous Motors Open
The variation of stator winding turns will directly affect the key parameters of a motor, such as winding resistance and winding reactance, which further affect the steady-state performance of the motor. In order to get excellent steady-st…
View article: Influence of harmonic voltage coupling on torque ripple of permanent magnet synchronous motor
Influence of harmonic voltage coupling on torque ripple of permanent magnet synchronous motor Open
The permanent magnet synchronous motor (PMSM) driven by an inverter is widely used in the industrial field, but the inverter has a significant impact on the operational stability of the PMSM. The torque ripple of the PMSM is directly affec…
View article: HVDC auxiliary emergency power control strategy for power disturbance in two different positions of AC/DC interconnection system
HVDC auxiliary emergency power control strategy for power disturbance in two different positions of AC/DC interconnection system Open
High voltage direct current (HVDC) emergency control can significantly improve the transient stability of an AC/DC interconnected power grid, and is an important measure to reduce the amount of generator and load shedding when the system f…
View article: Correction to: Research on the Influences of Time Harmonics on Permanent Magnet Synchronous Motors with Hybrid Magnet Poles
Correction to: Research on the Influences of Time Harmonics on Permanent Magnet Synchronous Motors with Hybrid Magnet Poles Open
View article: Research on the influence of rotational speed on the performance of high-speed permanent-magnet generator
Research on the influence of rotational speed on the performance of high-speed permanent-magnet generator Open
When the machine is at high speed, serious problems occur, such as high frequency loss, difficult thermal management, and the rotor structural strength insufficiency. In this paper, the performances of two high-speed permanent magnet gener…
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View article: Research on the influence of performance parameters on the super high speed permanent magnet synchronous generator external characteristic
Research on the influence of performance parameters on the super high speed permanent magnet synchronous generator external characteristic Open
Super high speed permanent magnet generators (SHSPMG) usually operate at high frequency.The external characteristic of the SHSPMG under condition of high frequency operation is quite different from that of conventional generators.Therefore…
View article: Eddy current density asymmetric distribution of damper bars in bulb tubular turbine generator
Eddy current density asymmetric distribution of damper bars in bulb tubular turbine generator Open
The major reasons that cause the damage of damper bars in the leeward side are found in this paper. It provides a route for the structure optimization design of a hydro generator. Firstly, capacity of a 24 MW bulb tubular turbine generator…
View article: Influence of different rotor magnetic circuit structure on the performance of permanent magnet synchronous motor
Influence of different rotor magnetic circuit structure on the performance of permanent magnet synchronous motor Open
In order to compare the performance difference of the permanent magnet synchronous motors (PMSM) with different rotor structure, two kinds of rotor magnetic circuit structure with surface-mounted radial excitation and tangential excitation…
View article: Research on the influence of driving harmonic on electromagnetic field and temperature field of permanent magnet synchronous motor
Research on the influence of driving harmonic on electromagnetic field and temperature field of permanent magnet synchronous motor Open
At present, the drivers with different control methods are used in most of permanent magnet synchronous motors (PMSM). A current outputted by a driver contains a large number of harmonics that will cause the PMSM torque ripple, winding hea…