Zhang Chengming

Zhang Chengming
Harbin Institute of Technology | HIT · Department of Electrical Engineering

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71
Publications
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662
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Publications

Publications (71)
Article
Full-text available
In high performance electric machines, the increase of fundamental frequency leads to additional losses in the winding due to parasitic effects such as the associated skin and proximity effects. In the first part, this paper presents an investigation into accurate modelling of AC losses in the winding using numerical methods and their experimental...
Article
Full-text available
This study presents an improved sub‐domain analytical model for the characteristic evaluation of the flux reversal permanent magnet machine with Halbach array magnets (FRPMM‐HAM) in rotor slot. The influence of iron saturation is considered by equating iron reluctances into airgap. Based on the different material magnetic permeabilities, the FRPMM‐...
Article
Full-text available
The successful market uptake of all-electric propulsion systems is closely related to the performance metrics of the electrical motor used within. In light of this, various road-maps have been set for the next two decades by aerospace and automotive bodies targeting ambitious future targets of the motor’s power densities and efficiencies. In achiev...
Article
The convective heat transfer characteristics of end-winding for a 10kW external rotor PMSM with open end cap are studied in this paper. A coupling iterative method of CFD and thermal network (TN) is proposed to solve the motor temperatures and convective heat transfer coefficients (CHTC). The variation laws of the CHTCs and heat dissipation proport...
Article
Full-text available
A fully superconducting wind generator employs superconductors in stator and rotor to enable high torque density and low weight, that is, enable an ultra-light electric machine for wind application. However, the level of the AC loss of the stator armature coils is a critical issue, which lacks investigations in the design of the fully superconducti...
Article
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In recent years, with the development of the permanent magnet linear synchronous motor (PMLSM), the application of PMLSM has not been limited only to the high-end equipment field; the primary stator discontinuous segmented-PMLSM (DSPMLSM), which consists of multiple primary stators and one mover, has also been applied in long-distance transportatio...
Article
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This paper presents the modular topologies of the dual-stator dual-winding permanent magnet (PM) linear motors for linear compressors used in the electrified transportation application. Compared to the conventional PM linear motor in compressor, the proposed modular model is designed with the same volume but a higher thrust force density and a furt...
Article
Solar long-endurance Unmanned Aerial Vehicle (UAV) has the ability of energy self-circulation, which has attracted attention in many application fields, such as high-speed Internet and smart city. Power balance is a determining factor in the power system of solar-powered UAV as it could lead to 24-hour energy cycle losses. The impacts of non-ideal...
Article
Full-text available
In order to improve the thrust density of the electric actuator in aircraft, a double primary tubular permanent magnet synchronous linear motor is designed. By establishing the magnetic circuit model, the air gap magnetic density and thrust characteristics of outer and inner primary motors are analyzed. Considering that it works in the wide tempera...
Article
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To solve the problem that the propulsion motor of the solar-powered aircraft is difficult to meet the high-torque-density requirement, the mass optimization method of a surface-mounted permanent magnet synchronous motor (SPMSM) based on a lightweight structure is proposed in this paper. According to the motor load generated by propeller, the streng...
Article
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Many application fields need motors that could output large torque in a short span of time such as missile and aircraft, but larger torque needs larger volume that could influence the system performance. Therefore, promoting the motor’s maximum torque with small volume is the new challenge for motors. So, this paper presents a method for analyzing...
Article
In this paper, an augmented generalized proportional integral observer (GPIO) is presented to estimate and then compensate the disturbance/uncertainty both existing in the electrical and mechanical subsystems of the motion stage driven with an air-bearing permanent magnet linear synchronous machine (PMLSM). Firstly, a modeling method for the two su...
Article
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In several industrial sectors, induction machines are being replaced with permanent magnet based alternatives, owing to the potential for higher power density and efficiency. However, high-speed applications feature a wide flux-weakening region, where advanced induction machines could bring benefits in terms of system-level optimization. This paper...
Article
This paper presents an analytical model of magnetic field of a permanent magnet synchronous motor (PMSM) with a trapezoidal Halbach permanent magnet array (THPMA). Compared with conventional Halbach array, the shape of each magnet in THPMA is transformed from rectangle to trapezium in polar coordinates. The THPMA is delaminated indefinitely radiall...
Article
Full-text available
The common analytical models for the no-load iron loss of permanent magnet(PM) motors usually neglect the iron loss caused by the rotating magnetic field in the tooth tips and the harmonics of the magnetic fields in the teeth and yokes. This paper presents an analytical model for no-load iron loss of a fractional-slot surface-mounted permanent magn...
Article
Traditionally, straggering the primaries of the double-sided permanent magnet linear synchronous motor (DS-PMLSM) is beneficial in helping to reduce the detent force caused by the longitudinal end effect, but leading to a reduction of the average thrust. To overcome this disadvantage, this paper provides a novel DS-PMLSM, which adopts the structure...
Article
This paper introduces Electrically Assisted Turbocharging (EAT) together with the requirements and challenges in selecting an electrical machine for the application. In an effort to identify the most appropriate technology, a detailed, quantitative, multi-domain comparison between Induction, Permanent Magnet and Switched Reluctance Machines an effo...
Article
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This paper investigates the thrust ripple of a consequent pole permanent magnet linear synchronous motor (CP-PMLSM). The components of the thrust ripple are analyzed through the comparison on the thrust waves’ constituent frequencies. A two-step design process is then proposed in order to reduce the different components of the thrust ripple. The fi...
Article
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This paper presents the design and fabrication of a rotary-impact magnetostrictive energy generator, used to harvest the rotation of human knee joint. The harvester consists of twelve movable Terfenol-D rods, surrounded by the picked up coils respectively, and alternate permanent magnet (PM) array sandwiched in each part of the shell. Rotational el...
Article
To overcome the disadvantage that the detent force of the permanent magnet linear synchronous motor (PMLSM) with short primary is large, a scheme of the modular PMLSM with flux barriers is proposed. First, the detent force model is established and verified. The phase-angle characteristics of the harmonics in the detent force waveforms are analyzed....
Article
To realize the precise thrust force control in permanent magnet linear synchronous motor (PMLSM) drives, this paper studies a novel design method of the high-performance current inner-loop. Firstly, to increase the control bandwidth, an improved predictive current (PCC) controller which takes account of one-step delay issue is presented on the basi...
Article
This paper investigates a modular slotless tubular permanent magnet linear synchronous motor, which includes several sectional motors by setting flux barriers and rearranging windings. It focuses on the design method of the different combinations with small detent force. The detent force models of the sectional and whole modular motor are establish...
Article
Full-text available
For high-velocity/high-precision linear motion systems, one of the most important factors that influence their dynamic performance is the characteristic of the inner current loop. The proportionalintegral (PI) controller is the most practical strategy used for current control. However, its linear structure and imperfect decoupling capability make i...
Article
Full-text available
To improve the endurance mileage of electric vehicles (EVs), it is important to decrease the energy consumption of the Permanent Magnet Synchronous Motor (PMSM) drive system. This paper proposes a novel loss optimization control strategy named system efficiency improvement control which can optimize both inverter and motor losses. A nonlinear power...
Article
A family of voltage-double magnetically coupled impedance source networks (VBMCISNs) is presented. The scheme of the proposed family is that adding the auxiliary capacitors and diodes to the magnetically coupled transformers to realize the voltage-double function. The proposed impedance networks can produce the higher voltage gain, reduce the volta...
Article
This study introduces a new dual switches converter with a high voltage gain and reduced power device voltage stress. Using a three-winding coupled inductor and voltage multiplier, the proposed converter achieves a high step-up voltage gain without a large duty cycle. However, unlike other converters with coupled inductor, the power device voltage...
Article
As a main driving force of electric vehicles (EVs), the losses of in-wheel permanent-magnet synchronous motor (PMSM) direct drive system can seriously affect the energy consumption of EVs. This paper proposes a loss optimization control strategy for in-wheel PMSM direct drive system of EVs which optimizes the losses of both the PMSM and the inverte...
Article
Full-text available
Electric vehicles (EVs) are considered as a new generation of transport to solve the energy crisis. The efficiency of permanent-magnet synchronous machine (PMSM) is an important performance for the energy loss of EVs. Considering the harmonic current caused by the PWM output voltage of inverter, this paper proposes a novel global loss model of PMSM...
Article
Full-text available
As a main driving force of electric vehicles (EVs), the loss of in-wheel permanent-magnet synchronous motor (PMSM) direct drive system can seriously affect the energy consumption of EVs. This paper proposes a loss optimization control strategy for EV in-wheel PMSM direct drive system which can optimize both the loss of PMSM and loss of inverter. Th...
Article
Full-text available
High-efficiency permanent-magnet synchronous machine (PMSM) drive systems need not only optimally designed motors but also efficiency-oriented control strategies. However, the existing control strategies only focus on partial loss optimization. This paper proposes a novel analytic loss model of PMSM in either sine-wave pulse-width modulation (SPWM)...
Conference Paper
This paper presents a mathematical model to describe the parameter changes of the primary segmented permanent magnet linear synchronous motor (PS-PMLSM) when the mover is between segments. Then, the back-EMF observation method based on disturbance observer is proposed. The extreme of the observer and the observing errors are analyzed. Based on the...
Conference Paper
This paper investigates a method to increase the energy economy of motors for an electric vehicle (EV) traction system. The low torque region of an EV motor is frequently used in everyday urban driving. Pulse-width modulation (PWM) carrier harmonic loss accounts for a high percentage of total loss for EV motors in this region. This paper reveals th...
Article
This paper presents an axial-flux microelectromechanical systems micromotor with dual-rotor and 10 mm diameter. The leakage fluxes are a large proportion of the total flux due to the micro dimension. Therefore, an accuracy prediction of the boundaries of leakage fluxes is vital for motor design. Response surface methodology is well adapted to obtai...
Article
This study presents a novel Z-source matrix rectifier (ZSMR). To overcome the inherent disadvantage that the voltage transfer ratio for traditional matrix rectifier (MR) cannot be more than 0.866, a Z-source network has been combined with the MR. The proposed rectifier realises a voltage-boost function and the Z-source network also serves as power...
Article
This paper proposed a novel test equipment for a high-temperature superconducting (HTS) synchronous motor with superconducting armature coils. The superconducting armature coils are adopted to transport the ac current in the consideration of alternating magnetic field, and the superconducting coils need to be tested before installing them in the HT...
Article
The permanent-magnet synchronous motor (PMSM) with high efficiency and high power density is now attracting more and more attention, which could be largely used in occasions supplied by limited energy and restricted by weight or capacity, for example, the electric vehicles and the solar unmanned aerial vehicles. In this paper, the electromagnetic a...
Article
Full-text available
In this paper, the performance of both SiC-MOSFETs and Si-IGBTs based electric vehicle (EV) traction systems under low speed and light load are investigated and compared comprehensively, particularly from efficiency point of view. Both conduction loss and switching loss of SiC-MOSFET are analyzed and modeled taking temperature effect into account....
Article
Full-text available
In this paper, the rotation effects of magnetic domain with different pre-compressive stress and basic magnetic field in the Tb0.3Dy0.7Fe2 alloy have been studied, the curves of magnetization induced by the rotation of magnetic domains are calculated, and the hysteresis characteristics of magnetization in the process of piezomagnetic and magnetoela...
Article
This paper presents the design and fabrication of a vibration energy harvester based on giant magnetostrictive material, which consists of one coil-wound Terfenol-D rod with a Permanent Magnet (PM) and air gap in its each magnetic circuit, and the PM array on the part of cap amplifier. In this design, cap amplifiers and variable air-gap are used to...
Conference Paper
For the model-based control strategy, the predictive current control (PCC) requires the full knowledge of the motor parameters, which reduces the system robustness. This paper presents an optimal PCC for the permanent magnet linear synchronous motor (PMLSM). Through the information of first two switching periods, the parameter variation issue can b...
Conference Paper
In this paper, a new prototype of magnetostrictive-based vibration energy harvester for power generating floor systems is presented, and its structure is constructed. The harvester utilizing the Villari effect (inverse-magnetostrictive effect) consists of a coil-wound Terfenol-D rod. To generate more electrical power, a PM (fixed on the part of cap...
Article
Full-text available
In this paper, a simple consititutive parameter identification method for the application of domain model in Tb0.3Dy0.7Fe2 alloy is studied, the magnetization and hystersis characteristics are summarized. Targeting the problem of unclarity and difficulty in directly testing the constitutive parameters in Tb0.3Dy0.7Fe2 alloy, numerical calculation a...
Article
This Paper presents the conceptual design of a self-sensing actuator (SSA) based on giant magnetostrictive material, which consists of variable-air-gap with a displacement amplification mechanism. A driving solenoid coil, surrounds the GMM rod, used to sense changes of magnetic induction in GMM. Modeling and simulation are used to validate the conc...
Article
The air gap of tubular linear motors moves linearly, causing heat transfer states of the motor to alternate repeatedly. Thus, the heat transfer coefficients of the mover inner surface and the stator outer surface vary constantly. In this paper, the combination model of the thermal circuit and temperature field is established to calculate the transi...
Article
This paper presents a finite element method approach for motor thermal analysis. Specifically, the 2-D temperature field model of a slotless tubular permanent magnet linear motor is established. The heat convection coefficients of the mover are then calculated based on fluid field analysis. This paper focuses on the winding to obtain an accurate wi...
Article
For permanent magnet linear synchronous motor servo system applied in the wafer stage of lithography, high tracking precision and high frequency response is required, and the system often requires fast response current inner loop. To study the control strategy of the current loop with the high dynamic performance, based on space vector pulse width...
Article
The characteristics of magnetic domain deflection and permeability under piezomagnetic and magnetoelastic effects in Tb 0.3Dy 0.7Fe 2 alloy are studied in this paper. Based on the minimal value principle of Stoner-Wolhfarth model, the curve of free energy versus domain deflection angle is analyzed, and the angle deflections of magnetic domain under...
Article
This paper proposes a giant magnetostrictive valve (GMV) which uses a tube giant magnetostrictive material (GMM) rod as the actuator. Based on the analysis of the structure and magnetic field of giant magnetostrictive actuator (GMA), a GMV is designed and manufactured. The output displacement characteristics of the GMA under different temperatures...
Conference Paper
The emphasis of this paper is to research the temperature characteristic of giant magnetostrictive actuator (GMA). First, a prototype of GMA driving by a Φ 5 × 40 mm GMM rod (Terfenol-D) is made and the experimental test-bench is set. Then, finite element method is adopted for analyzing and optimizing the temperature rise of GMA, and the influence...
Article
This paper presents a flow regulator based on a fast-response giant magnetostrictive actuator (GMA). The finite-element method is adopted for analyzing and optimizing the magnetic circuit structure of the GMA, and the influence of structural parameters on the driving magnetic field uniformity is summarized. Based on the analysis and output demand,...
Article
The emphasis of this paper is to research the dynamic inductance model of giant magnetostrictive actuator (GMA). First, the relative permeability of giant magnetostrictive material (Terfenol-D) under different pressures and different magnetizations are tested. Then, the inductance parameter of GMA is computed based on the above relative permeabilit...
Article
Release-launch is a fundamental operation in space platform. Not like traditional land-base launcher, space-base launcher is more flexible and more efficient. Tubular linear electromagnetic launcher (TLEML), which provides higher force density, simple structure and no unilateral magnetic force, compared with the flat linear electromagnetic launcher...
Article
A solid metal plate is often used as the projectile in reconnection electromagnetic launcher. Yet, the performance is not optimum. In this paper, analysis is made about the laws of influence on magnetic field distribution of driving coils by using projectiles with different figures and materials. Further analysis is made about the influence on laun...
Conference Paper
Full-text available
The vehicle vibration affects its ride comfort and handling stability. Because the passive suspension has its limitations, many new-type suspensions have emerged as the times require. Active suspension is one of them. The vehicle active suspension based on giant magnetostrictive actuator (GMA) can finish active control of vibration relying on its e...
Article
Kinetic energy of a vibrating object in vehicles is normally absorbed in a form of thermal energy by mechanical dampers and other facilities. So the energy of the vibration is consumed wastefully. Using electrical shock absorber, energy of the vibration is converted into electrical energy. The electrical shock absorber consists of a permanent magne...
Article
This paper presents a basic research on giant magnetostrictive actuator (GMA) for fuel injector. An injector is a pilot operational valve with position servomechanism, which enables to control injection rate freely with input current into the actuator. Based on the combination of finite element analysis and experiment, a prototype of GMA is success...
Conference Paper
Release-launch is a fundamental operation in space platform. Not like traditional land-base launcher, space-base launcher is more flexible and more efficient. Tubular linear electromagnetic launcher (TLEML), which provides higher force density, simple structure and no unilateral magnetic force, compared with the flat linear electromagnetic launcher...
Article
With the exploitation of the astrospace, platform is playing more and more important roles. Linear electromagnetic launcher offers a lot of merits such as high speed, precision- acceleration control, wide adjustable range of the initial launch velocity and projectile mass, high energy conversion efficiency, etc. So it will be the best choice of spa...
Article
Giant magnetostrictive material (Terfenol-D) is a new kind of functional material driven by magnetic-field. Under normal temperature, it has many merits including high strain, big output force and quick response, etc. That makes giant magnetostrictive actuators (GMA) have extensive application on electromagnetic-devices or MEMS such as precise posi...