The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper proposes new modulated carrier control (MCC) method for power factor correction (PFC) rectifier which provides high power factor (PF) and low total harmonic distortion (THD) regardless of continuous conduction mode (CCM) and discontinuous conduction mode (DCM). The proposed control method employs a modified MCC control circuit based on the conventional MCC using average current sensing...
In this paper, 150W multi parallel LDC system, different from integral type LDC system of the conventional electric vehicle is proposed. The high efficiency LDC system is designed by reducing the losses of the magnetic element and semiconductor element by lowering the rated capacity through power sharing. Also, LDC is designed as active clamp forward converter to reduce the loss caused by the reset...
This paper proposes a battery simulator (BS) based on a Z-source rectifier (ZSR), with the intention of emulating the discharge or charge characteristic of an actual lithium-polymer battery with high voltage and large capacity. The proposed BS is used for power testing for battery applications. The battery model, combined with a Shepherd model and a Thevenin model, is adopted to freely change the...
In this paper, a new control strategy for seamless mode transfer of grid-connected single-phase inverter is proposed. Generally, power flow between DC side and AC side is controlled by current reference of grid-connected inverter in d-q synchronous rotating frame. Therefore, it is general to reverse the current reference if the direction of power flow is changed. However, it causes a rapid change...
Increasing renewable energy, ESS and digital loads can be combined with DC power distribution to achieve high energy utilization efficiency. Emergency power supply needs consideration to prepare power failure of AC grid due to characteristic of DC distribution system connected with AC grid and digital loads. The application of emergency generators should be considered as the ESS cannot perfectly satisfy...
In this paper, a novel DC-link voltage variation method using a high-efficiency dc-dc converter for the three-phase-inverter of IPMSM(Interior Permanent Magnet Synchronous Motor) is proposed. The proper variation method of DC-link voltage is needed to reduce the torque ripple of IPMSM and, switching loss of the inverter. Also, to meet the high-efficiency requirement of the DC-DC converter with the...
In this paper, ZVT interleaved bidirectional LDC(IB-LDC) with switching frequency modulation for mild-hybrid electric vehicle is proposed. The IB-LDC is composed of interleaved buck and boost converters employing an auxiliary inductor and auxiliary capacitors to achieve zero-voltage-transition. Operating principle of IB-LDC according to operation mode is introduced and mathematically analyzed. Moreover,...
In this paper, an advanced droop control using a multinomial model for operating the parallel-connected uninterruptible power supply (UPS) inverters is proposed. To control the parallel inverters without any physical communications, the control method using a P/Q droops is conventionally used. The conventional method droops voltage and frequency using the monomial model. In conventional droop control,...
This paper presents predictive control for single phase multi-module UPS inverters with output LC filter modeling. In the previously proposed current predictive control, it has finite dynamic response of transient time by voltage PI control. To complement this problem, voltage and current predictive control are proposed to substitute voltage PI control with output LC filter modeling. Multi-module...
In this paper, position sensorless control method of IPMSM applying three shunt sensing PWM inverter using predictive current for phase current reconstruction and EMF calculation is proposed. Considering the price and volume of the system, a motor drive system applied with shunt and sensorless has been recently studied. However, there is some area that cannot measure three phase current especially...
This paper presents a ZVT(zero-voltage-transition) interleaved synchronous buck converter with passive soft-switching cell to achieve ZVS(zero-voltage-switching) of MOSFET switches. The proposed interleaved buck converter is composed of two synchronous buck converter modules and passive soft-switching cell. The passive soft-switching cell consists of coupled-inductor and DC-link capacitor. All switches...
In this paper, Li-ion battery charging method of On-Board Charger(OBC) for Electric Vehicle(EV) considering temperature is proposed. Considering the characteristics of the Li-ion battery that varies with temperature, it is a method for charging while maintaining the proper temperature. It operates in three modes and maintains the proper temperature of the battery via self-charge·discharge. In this...
Researches to control water content of Polymer Electrolyte Membrane(PEM) are actively performed for increasing performance & durability of Fuel cell. This Research to control water content focused on measurement of PEM impedance. In this paper, The measurement system of PEM Impedance based on AC impedance method is proposed. Bi-directional DC/DC converter is designed to measurement of PEM impedance...
48 V to 12 V Soft-Switching Interleaved Buck and Boost Converter for mild-hybrid vehicle is proposed. The converter is consist of interleaved buck and boost converter with auxiliary inductor. Resonance between auxiliary capacitors and inductor is used for soft-switching. Therefore, reduction of the passive component size and switching loss can be implemented. Also, optimal design of the auxiliary...
The control method of IPMSM (Interior Permanent Magnet Synchronous Motor) can be classified DTC (Direct Torque Control) and FOC (Field Oriented Control). For EV application using IPMSM, the improvement of transient states dynamic and switching loss reduction are also required, as well as stable current quality in steady states. Also, the switching loss of VSI in EV power train is very important issue...
Nowadays, DSP based design for power electronics system is rapidly increasing and the design complexity with advanced algorithm is more complex than before. Even two or three power converter stages are combined in a single system. Accordingly, a lot of considerations such as switching frequency, rated current, rated voltage, passive components and controller gains make it hard for engineer to design...
Recently, The necessity of renewable energy be on the rise in as fossil fuel is depleted. Study of offshore wind power generation is being carried out as part of the renewable energy business. The 3-level inverter for use in the offshore wind power system studied is increasing as high capacity about offshore wind power. The 3-level inverter had an advantage that make reference voltage higher than...
A novel phase shedding control algorithm considering maximum efficiency for 3-phase interleaved boost converter is proposed. The phase shedding control algorithm is performed to control the operating phase of interleaved converter in accordance with wide load range for high efficiency. Conventional interleaved converter has low efficiency under the light-load condition. In this paper, the 3-phase...
The three-phase Inverter system using single phase grid line should combine the Inverter circuit with PFC(Power Factor Correction) circuit because of improving the Power Factor and Power Efficiency. In order to design the system at home appliance as a low-cost application, nowadays the non-isolated design is mainly used for this Inverter system. In this case, the wrong designed PCB produces an unwanted...
In this paper, control and design method of the fuel-cell (FC) stack diagnostic bi-directional converter are proposed. FC stack diagnostic converter is applied the bi-directional DC/DC converter for controlling the AC current. The AC current control is performed by applying the d-q transform for accurate current control. As a result, it can diagnose the status of the FC stack by supplying the AC current...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.