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The collective dynamics under different coupled strengths in the coupled synchronous reluctance motor drives is presented in this paper. With variation of the coupled strengths, the coupled system exhibits rich dynamical phenomena such as amplitude death, periodic anti-synchronization and complete synchronization. By the amplitude death the coupled synchronous reluctance motor drives can be stabilized...
The loosely coupled transformer is the key component of a contactless power transmission (CPT) system. In order to reduce the size of the loosely coupled transformer, mixed winding arrangement containing planar winding and vertical winding is proposed in this paper. However, because of the using of the vertical winding, the proposed transformer has a large part of leakage flux at the back of the core,...
The electromagnetic interference (EMI) filter plays an important role in the EMI noise suppression. As the development of the switch mode power supply (SMPS), the power density of the SMPS improves every year. As a result the distance between components becomes smaller and smaller. The near-field magnetic coupling between components becomes larger and larger. However there are fewer studies about...
A novel topology scheme for wireless power transfer (WPT) applications whose transmitter consists of dual opposite phase class E inverters was proposed. Series-series compensation topology was applied for magnetic coupling structure. Constant output voltage at secondary side can be easily realized by inserting a π transconductance at the output of inverter to ensure the primary currents to be constant...
This paper presents a technique to be used for the cellular phone charger. The proposed technique identifies system conditions to control the output voltage, measuring only the primary side voltage and current. The method estimates the load and the coupling coefficient of the circuit by perturbing the operating frequency. The control method, designed in Primary-Series-Secondary-Series (SS) topology...
Bi-directional inductive power transfer (BD-IPT) systems are suitable for applications such as wireless integration of Electric Vehicles (EV) with the utility grid. This paper presents a comprehensive comparison of the performance between the two most widely used BD-IPT systems in EV applications - a parallel tuned inductor-capacitor-inductor type BD-IPT system and a series tuned inductor-capacitor...
In order to solve the design problem of coupled inductor in multiphase interleaving bidirectional DC/DC convertor, the universal design criterion of coupled inductor with general applicability was proposed. The Buck+Boost interleaving and magnetically integrated bidirectional DC/DC converter was studied under Buck mode with all inductors coupled symmetrically. The universal design criterion of coupled...
Large flywheel energy storage systems up to megawatt/sub-second range are needed to supply or absorb transient power for pulse loads. Due to its advantages, high power electrically excited synchronous motor is usually preferred in these systems. The Field Oriented Control and Direct Torque Control schemes are two kinds of effective methods used to achieve a stable DC-link voltage. This paper compares...
In LLC resonant converter, the integrated transformer with high leakage inductance is preferred to get high power density by eliminating the series resonant inductor. However, high leakage inductance results from stray magnetic field between primary winding and secondary winding, which brings near-field effect and severely impacts on near-by components. In this paper, the mechanism of near-field effect...
The conducted EMI simulation plays an important part in the SMPS in the product design. The analysis of common mode noise is much more complex than differential mode noise. The CE simulation accuracy depends on the accuracy of CM mode noise. CM noises are determined by the electric coupling between the voltage jump point and the ground. Traditional the CM models of the electric coupling between the...
Thermal loading of Insulated Gate Bipolar Transistor (IGBT) modules is important for the reliability performance of power electronic systems, thus the thermal information of critical points inside module like junction temperature must be accurately modeled and predicted. Usually in the existing thermal models, only the self-heating effects of the chips are taken into account, while the thermal coupling...
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