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This paper describes the frequency analysis method of the conducted noise in AC/DC converter using SiC-MOSFET on the basis of the leakage current by switching. The error of the experimental and simulation result of the disturbance voltage is 10 dBμV. The simulation result can be closely simulated including resonance points. Furthermore, this paper presented verification results of designed EMI filters...
This paper presents the development of an up conversion mixer for wireless transmitter application in a 0.18-μm CMOS technology. The designed up-conversion mixer input center frequency is 620MHz and the output is 2.4GHz and 5.2GHz, respectively, for white space of TV broadcast frequency (470∼710MHz) communication system. In this design, it is become available by constructing dual band filter using...
The concept of energy harvesting has been widely accepted as future necessity for the society, accelerating its transition to the environment of the so-called green technologies. The energy harvesting approaches in various domains of human surroundings have been considered, among them those related to the energy of ambient electromagnetic field (EMF). In this early research paper, the inductor with...
This work develops a systematic state-space approach to modeling of an improved buck-boost DC-DC converters. The averaged model of the converters is analyzed. Based on this model, a control law is design to keep the output voltage stable when the input is unstable. The simulation results are presented to confirm the capability of the converter to keep the output voltage stable. The proposed converter...
A new class of nuclear quadrupole resonance (NQR) detector based on non-Foster circuits (NFCs) is introduced. NQR is a solid-state radio frequency spectroscopic technique, allowing the detection of different substances based on their spectral profiles. Recently, non-Foster circuits have received significant interest for broadband impedance matching of small antennas; this principle will be used to...
This paper presents a power scheme known as back-to-back used as a power conditioner for a wind turbine system which uses a permanent magnet synchronous generator (PMSG). The back-to-back power structure consists of a three-phase pulse width modulated (PWM) active rectifier, a dc-link bus voltage and a three-phase PWM inverter. Both power conditioning structures can be operated under traditional and...
A novel dualband impedance transformer based on fractional-order inductor and capacitor is proposed in this paper. This transformer is designed to transfer the arbitrary frequency-dependent complex impedances sources to loads at two irrelevant frequencies with one fractional-order inductor and two fractional-order capacitors. Each fractional-order element has two parameters to be determined: the order...
A new DC cancellation technique for a mixer-first receiver in UHF RFID reader is presented in this paper. A band-pass filter composed of an inductor and a capacitor is proposed to cancel the large DC component caused by the carrier leakage at the output of the passive mixer where the mixer is the input stage of the receiver to achieve a high 1dB compression point. Simulation results indicate that...
Increasing energy demands have created the need for developing new, environmentally friendly, alternative energy sources for electricity generation. Solar panels can convert energy generated from the Sun into usable electricity. These solar panels require power management approaches that can extract the maximum power available. Maximum Power Point Tracking (MPPT) is a technique used to obtain the...
Integrated voltage regulators (IVRs) fabricated and positioned close to the microprocessors can improve the energy conversion efficiency, power density and the output voltage regulation performance compared to discrete VRs. The highest cost in terms of space and volume in such IVRs corresponds to the bulky passive components needed for their operation. In this paper, two different hybrid architectures...
The loss contribution of a 2.3 kW synchronous GaN-HEMT boost converter for an input voltage of 250 V and an output voltage of 500 V was analyzed. A simulation model which consists of two parts is introduced. First, a physics-based model is used to determine the switching losses. Then, a system simulation is applied to calculate the losses of the specific elements. This approach allows a fast and accurate...
This paper presents a comparison between conventional base driver concepts for bipolar silicon carbide transistors and an approach based on utilizing a buck-converter-IC to drive the bipolar transistor. The different concepts are simulated and compared with respect to switching performances and driving losses. The results are validated by corresponding measurements.
The simulation of current source modular multilevel converter (CSMMC) based systems with large number of submodules require significant computational efforts. In this paper, a simplified model of CSMMC is developed to reduce the computational complexity while maintaining the accuracy of the traditional detailed model. The model is constituted using controlled current sources in each arm of the converter...
Two designs of integrated magnetic planar transformer called Face to Face transformer are studied: The first one consists in depositing the copper windings on the magnetic material, the second consists in micromachining the magnetic layer before depositing the conductive layer in order to bury copper windings inside the magnetic material.
Traditional power electronics classes utilise analytical calculations, numerical simulations and ready to run hardware for laboratory measurements. This complicates the understanding of e.g. parasitic circuit elements. To circumvent above restrictions a concept allowing students to understand, simulate and build their own DC/DC-converters including all steps from soldering to programming is presented.
The paper presents a comparison of the power output of wind driven generators coupled to active and passive converter circuits at certain site in Bulgaria. A table compares the power output difference expressed in percent. Actual wind resource data gives the opportunity to have evaluation and analysis at three different heights. Advantages of active and passive control are derived and summarized....
Series of commissioning tests are needed before UHV transmission system putting into operation. In this paper, with the characteristics of Huainan-Shanghai 1000kV transmission system, electromagnetic transient simulation results and experimental data portion commissioning tests were compared and analyzed. Three typical experiments were studied, including the switching capacitor of low-voltage side...
In this paper, an investigation of the behaviour of a high step-up DC/DC converter is conducted as an application in a Static Waste Heat Recovery System (SWHRS) for ships with DC bus. It is proven that a higher step-up ratio can be achieved with the proposed DC/DC converter compared with that of a classical step-up converter, even in a high power level. Also, analysis of the proposed Waste Heat Recovery...
Development and research for power converters is focused on high power density, high modularity, low costs as well as high reliability and efficiency. The use of multilevel converters, like Neutral Point Clamped (NPC) Converters, in high power applications in the range of 1.5 MW up to 6MW can be favorable because of the filter size reduction and therefore reduction of weight and total volume of the...
Inhomogeneous current sharing between parallel IGBTs can compromise the capability of power modules to withstand short circuit events. Especially if the gate voltages are influenced by coupling effects, single IGBTs will carry excessive currents. This paper analyzes the effects of different parameters on the maximum short circuit current of a 1.7kV power module composed of three parallel half bridge...
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