A5101582296- Electric Motor Design and Analysis
- Multilevel Inverters and Converters
- Sensorless Control of Electric Motors
- Silicon Carbide Semiconductor Technologies
- Microwave Engineering and Waveguides
- Piezoelectric Actuators and Control
- Superconducting Materials and Applications
- Advanced Electrical Measurement Techniques
- Electromagnetic Scattering and Analysis
- Gyrotron and Vacuum Electronics Research
- Sensor Technology and Measurement Systems
- Electromagnetic Simulation and Numerical Methods
- Advancements in PLL and VCO Technologies
- Magnetic Bearings and Levitation Dynamics
- Magnetic Properties and Applications
- Electric and Hybrid Vehicle Technologies
Harbin Institute of Technology
2012-2016
State Key Laboratory of Robotics and Systems
2015
Heilongjiang Institute of Technology
2014
Commutations existing in a brushless dc motor (BLDCM) drive system not only aggravate the torque ripple and reduce power factor but also cause catastrophic failure of sensorless based on zero-crossing detection back electromotive force when commutation duration approaches or exceeds 30 electrical degrees. For BLDCM with long time, it is necessary to shorten time. In this paper, technique making time significantly reduced by means novel inverter topology presented. The proposed idea supplying...
Brushless dc motor drive system employing minimized dc-link capacitor is becoming popular for the reason of compactness and long lifetime. However, once capacitance reduced, reversal current will lead to excessive voltage rise in link when conventional limit strategy used. In order avoid damage caused by oversize pumping-up voltage, a novel without necessary. this paper, traditional all-turn-off logic replaced half-turn-off logic. Then, an improved sampling scheme presented replace...
Nowadays all-digital resolver-to-digital conversion is popularly invested for space-limited applications. However time delay inevitable in demodulation part when frequency shifting algorithm used. Furthermore, the angle calculation result affected by delay. So synchronous analyzed this paper to void The demodulated sine and cosine signals always exist with amplitude quadrature errors. In order eliminate influence of these two errors, double reference frame-based phase-locked loop (DSRF-PLL)...
Commutation angle is a key design criterion when brushless DC (BLDC) motors sensorlessly operate based on the detection of back electromotive force (EMF) zero-crossing and must be designed significantly less than 30 electrical degree. The paper descr
This paper presents a novel limited-angle torque motor (LATM) with moving coil for oscillating mirror system. The proposed LATM has constant coefficient over its operation range, rapid dynamic response, and easy mounting owing to special structure of the stator rotor. In design process, some equations are derived analyze toque coefficient, moment inertia, other parameters LATM. A optimization approach is carried out obtain maximum torque/moment inertia ratio in consideration outer diameter...
Brushless dc (BLDC) motor drive system employing minimized dc-link capacitor is becoming popular due to compactness and long life. With low capacitance, the bus voltage will be pumped up severely if regenerative current flows back, occurrence of which common in conventional limit operation. To avoid damage caused by oversize pumping-up voltage, a strategy without necessary. This paper proposes novel for BLDC with capacitor. The realization based on single sensor software comparison presented...
Deep-sea permanent magnet motor equipped with fluid compensated pressure-tolerant system is compressed by the high pressure both outside and inside. The induced stress distribution in stator core significantly different from that land type motor. Its effect on magnetic properties of important for deep-sea designers but seldom reported. In this paper, core, regarding seawater compressive stress, calculated 2D finite element method (FEM). electrical steel sheet, is, permeability, BH curves, BW...
The coupled Helmhotz-type differential equations for a general cylindrical structure containing chiral material were transformed into pair of decoupled equations, and this new set was solved to find expressions Ez Hz with the expansion complete eigen functions in elliptical chiralwaveguide. There are no pure TE （TM） or even-type （odd-type） modes existing individually if each other. influences eccentricity admittance on dispersion discussed paper.
Application of ridged rectangular and circular waveguides has been found in many areas. In this paper，with the Rayleigh-Ritz method polynomial representation，the wave propagation characteristics elliptical waveguide are analyzed. The numerical results good agreement with calculation using electromagnetic field simulation software. variation bandwidth physical dimensions studied. It is helpful for optimizing kind structure.