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It deals with the processing of high voltages and currents to deliver power that supports a variety of needs. The goal is to control the energy’s flow from source to load in the most efficient, reliable, cost-effective way possible.
The variable dc-link voltage control methods can effectively improve the operation efficiency of the permanent magnet synchronous motor (PMSM) drive system. It controls methods applied in the PMSM driven by a quasi-Z-source inverter are limited to the analytical calculation methods based on the system model.
The circuit configuration on the secondary sides of the employed three-winding transformer results in high-frequency current injection into each of the switch nodes, thereby making zero-voltage-switching operation of the devices possible. This functionality while using the same number of devices as conventional two-stage and single-stage high-frequency-link.
Electric vehicle (EV) ensures the reliable riding of a vehicle without range anxieties. Solar PV, battery and ultra-capacitor are viable sources to power the EV. The converter can be used to transfer power between the input sources and loads. The converter can be operated in ten different modes using the same structure by controlling the appropriate switches.
The EV port is designed to be isolated and bidirectional so that both charging and vehicle-to-grid can be implemented. The converter uses a central dc link to exchange power between the EV and PV, thereby increasing efficiency. The use of silicon carbide devices and powdered alloy core inductors enables high switching frequency and power density.
The machine learning algorithm is to detect arc faults effectively. It was optimized to the characteristic signals of the arc with different loads for higher detection accuracy and robustness. In the simulative experiments for the power system the electric vehicle and the resistor will reach a high detection rate, respectively.
The ultra-lift Luo-converter of the new technology produces even higher voltage transfer gain. The analysis and calculation illustrated the advanced characteristics of the converter.
It is concerned with employing a permanent magnet BLDC motor drive powered from a solar photovoltaic array in which a Luo converter is used for maximum power point tracking. It has high power density, high efficiency and a simple structure rendering high output voltage with small ripples.
Electric Vehicle (EV) battery cooling system consists of cooling channels to direct the cooling liquid flow below the battery packs. The heat absorbed by the cooling liquid is transported to the Heating-Cooling Unit. It represents an electrical heater for fast heating of the batteries under low temperature conditions.
A fundamental structure of a single-phase transformer-less grid connected multilevel inverter based on a switched-capacitor structure is presented. With the series-parallel switching conversion of the integrated switched-capacitor module in a packed unit, attractive features for the inverter can be obtained such as high efficiency and boosting ability within a single stage operation.
An innovative smart PV inverter control as STATCOM for obviating the need for a physically connected distribution network for controlling steady-state voltage and temporary over voltages resulting from unsymmetrical faults. It increases the distributed generator hosting capacity of distribution feeders at more than an order of magnitude lower cost under similar network conditions.
To facilitate this wireless power transceiver (WPT) function with the minimum additional cost which can be reconfigured between a differential class-D power amplifier (PA) and a full-wave rectifier. It employed a maximum current charging mode to maximize the B2B charging efficiency, by charging the loading battery with rectifier and by powering with the sourcing battery.
A Power Factor Correction is utilized to improve the power quality constraint. Bridgeless-Luo converter and Bridgeless Ultra Luo converter are two good power factor correction solutions that can be used for the application. It analyzed the performance of two converters as a pre-regulator for the BLDC motor drive system. MATLAB Simulink model are utilized for the analysis.
The module of the multilevel inverter generates 13 levels with unequal DC sources (2VDC and 1VDC). It involves two chargeable capacitors and 14 semiconductor switches. The capacitors are self-charging without any extra circuit and a lower number of components makes it desirable to use in a wide range of applications.
A combination of a three-level multilevel inverter, a modified single-ended primary-inductor converter (SEPIC), and a dc voltage selector circuit is employed in the torque ripple suppression circuit. The experimental results show that the topology is an attractive option to reduce the commutation torque ripple significantly at low- and high-speed applications.
An efficient direct ac-to-ac matrix converter bucking and boosting both the magnitude and frequency of the output voltage. It reduces switching losses and thus enhances the switching converter efficiency. This reduces the complexity of the control circuit.
Brushless DC (BLDC) motor is more reliable than a classic DC motor with higher efficiency. It is used conventional linear controller such as PI, PID and PD controller. Single-Input Fuzzy PI Controller (SIFPIC) is a hybrid controller that combines the advantages of the linear PI controller and fuzzy controller in one control structure.
It presents an interleaved non isolated dc-dc converter with high-voltage gain and zero-voltage switching performance. This gives rise to further extension of the voltage gain. Applying the interleaving technique at the input of the converter, the ripple of the input current is reduced. Due to the leakage inductances of coupled inductors, the diodes are turned-off under zero-current switching condition.
The converter is operated in discontinuous output inductor current mode to achieve PFC at ac input. It avoids the inner current control loop which further eliminates the sensing of current. This makes the system more reliable and robust. A small-signal model of the converter by using the current injected equivalent circuit approach is presented to aid the controller design.
The grid integration enables the consumer an uninterrupted operation of the water pump irrespective of solar insolation level. It is utilized to generate switching pulses to control the bidirectional power flow between the solar PV system and utility grid through the common dc link. A sensor is used to drive the PMSM coupled to the water pump. The boost converter is used for extracting optimum power from the solar PV array under variable insolation.
It deals with the design and implementation of a new charger for a battery-operated electric vehicle (EV) with power factor improvement at the front end. The PFC converter is controlled using a single sensed entity to achieve the robust regulation of dc-link voltage as well as to ensure the unity power factor operation.
It describes several PWM strategies with an AC chopper to control the speed of a single-phase induction motor. The technique has been used to operate the power electronics switches of an AC chopper. It maintains the speed of the single-phase induction motor constant at different load conditions by using the PWM technique, which reduces the harmonic contents in motor current and increasing the motor efficiency.
It presents a single-stage solution for PV fed three-phase induction motor water pumping system. The system is operated using the control strategy which includes Maximum Power Point Tracking and Space Vector Pulse Width Modulation (SVPWM). It is used to operate the cascaded inverter and generates three-level output voltage under all environmental conditions.
The system in which various sources of renewable energies are connected to each other in a parallel structure which use of specialized converters at the input voltages of a few tens of volts, and giving out several hundred of volts. The DC-DC converters with magnetic coupling will be analyzed more particularly to show the technological limits.
A single-phase transformer less inverter topologies with reduced leakage for grid tied photovoltaic (PV) applications. These topologies are mainly classified on the basis of leakage current reduction methods: galvanic isolation with common mode voltage (CMV) clamping and without CMV clamping.
The converter is to interface with two different power simultaneously. The two boost converters are integrated with a shared diode and a filter capacitor with certain dead-bands. It operates either in discontinuous-conduction mode or in hybrid conduction mode.
A quasi-cascaded has the advantages of cutting down passive components. A capacitor with a low voltage rating is added to remove an offset voltage of the output when a input voltages of two modules are unbalanced.
A new LLC resonant converter with transformers in parallel of the electric vehicle battery charger. The charger provides a wide range output voltage for battery system. To maintain the high efficiency under charging, it adopts a bidirectional switch. At low-output power condition, the charger uses one transformer to transfer the energy.