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In this paper, an on-board integrated battery charger based on central-tapped winding switched reluctance motor of electric vehicle is presented. All the components used for driving mode are employed in the charging process, and there is no need for hardware reconfiguration between charging and driving modes of operation. The solution can be connected directly to single-phase grid to perform charging...
The multilevel converter is a prospective topology for both Medium Voltage and High Voltage Direct Current (HVDC) applications. In high power application, the forward topology is applied to increase the power region. In this paper, a novel forward-mode five-level inverter is presented which combines the features of the conventional multilevel converters and forward topology. The converters can transfer...
A single stage high gain Buck-Boost inverter (BBI) for photovoltaic application is proposed in this paper. The proposed topology is with simple circuit and low switch count. The three-winding tapped inductor is applied to attain high gain feature. One-cycle control (OCC) is adopted to obtain superior source ripple rejection. The paper presents the detail operation principle of the proposed topology,...
A hybrid resonant zero-voltage zero-current switching three-level converter is proposed in this paper, which undergoes half of the input voltage for switches. The proposed converter, utilizing two transformers, adopts IGBTs for all six power switches and operates in discontinuous current mode and can achieve zero-current switching for the four main switches and rectifier diodes over the whole load...
This paper proposed an unequal zero voltage vector distribution modulation strategy to suppress the zero-sequence current of five-phase open-winding fault-tolerant fractional-slot concentrated-winding interior-permanent-magnet (FTFSCW-IPM) motor driving system with common DC bus. Compared with the conventional eliminating common-mode voltage vectors modulation strategy, this method can well suppress...
The high frequency high voltage (HFHV) transformer is one of the biggest contributors for conducted electromagnetic interference (EMI) emission of switching power supply. The transformer technologies for reducing conducted EMI emission focus on the shielding and changing the winding structures. However, for suppressing conducted EMI, the suppression capability of shielding is limited; current methods...
This paper proposes a modulated model predictive control (MMPC) algorithm for a brushless double-fed induction machine. The Brushless Doubly-Fed Induction Machine has some important advantages over alternative solutions for brushless machine applications. The proposed modulation technique achieves a fixed switching frequency, which gives good system performance. The paper examines the design and implementation...
Many control and monitoring applications including thermostats, doorbells, and security systems utilize 60 Hz transformers with grid-voltage inputs and 16 V to 24 V ac outputs. The new DOE Level VI efficiency standard places stringent requirements on the no-load quiescent loss of grid-interface power supplies, including these low-voltage transformers. This paper explores a low-cost but highly effective...
One of the primary requirements of dual active bridge (DAB) dc-dc converters is to operate under zero voltage switching (ZVS), to reduce switching losses and increase operating efficiency. However, three-phase DAB converters are known to have limited capability to operate in ZVS, particularly at low power levels, because of their inherent two-level six-step phase shifted square wave modulation strategy...
High power multi-level converters are deemed as the mainstay power conversion technology for renewable energy systems including the PV farm, energy storage system and electrical vehicle charge station. This paper is focused on the modeling and design of coupled and integrated magnetics in three-level DC/DC converter with multi-phase interleaved structure. The interleaved phase legs offer the benefit...
In this paper, a new hybrid multilevel six-phase machine drive system topology is proposed and investigated. Such topology is composed of two three-level three-phase neutral-point-clamped (NPC) inverters and a traditional two-level three-phase voltage source inverter (VSI) with isolated DC-links feeding the open-end windings (OEW) of a six-phase induction motor (SPIM). The system model, operating...
Wide-band-gap devices can provide much faster switching speed. But the dv/dt of switching node voltage also becomes much higher, causing potential common mode noise issue. On the other hand, PCB winding transformer has significant large inter-winding capacitance, which provides a low impedance path for common mode noise. In this paper, a symmetrical resonant converter as well as a symmetrical PCB...
A new three-phase DC-DC PWM boost converter that is suitable for use in renewable energy applications is proposed in the paper. The number of components in the proposed circuit is fewer that other previously proposed converters of the same type, resulting in lower cost and simpler operation. The paper presents the new converter and discusses its operation, features and design. Experimental results...
This paper proposes a novel field excitation scheme employing 4-leg converter in Machine-side Converter (MSC) of Wound Rotor Synchronous Generator (WRSG) wind turbines. The conventional thyristor rectifier and brush/slip-ring contact for supplying the field excitation is replaced by the rotating transformer and diode rectifier in the field winding side. 4th-leg power converter of MSC provides ac voltage...
This contribution suggests an approach to determine the optimal design of a Permanent Magnet Synchronous Motor for a given application by calculating the effects of coil configuration switching, pole-changing and multi-phase windings. The impact on the torque-speed-characteristic of a motor is evaluated in a normalized parameter plane, enabling the designer to compare the influences by using criteria...
This paper compares some performances of a six-phase switched reluctance motor (SRM) using asymmetrical half bridge (AHB) converter and m-switch converter. The topologies and characteristics of the two converters are firstly analyzed. The steady-state torque, current and voltage waveforms of SRM using the two converters are performed and compared under the same operation conditions. Simulation results...
In single-phase photovoltaic (PV) systems, power mismatching between input and output terminal leads to power pulsation, seriously affecting maximum power point tracking (MPPT). Paralleling an electrolytic capacitor (e-cap) across PV panel to smooth power pulsation seems to be an unreliable method owing to its short lifetime. Various power decoupling methods used in micro-inverters have been proposed...
A new scheme for Direct Torque Control (DTC) of dual inverter fed Induction Motor (IM) with open end stator winding is presented in this paper. This scheme eliminates common mode voltage from the windings there by facilitating both inverters to draw power from a common DC source without circulation of common mode currents though the windings and switches. A major advantage of this DTC scheme is the...
This study presents a new high step-up resonant converter for renewable energy applications. Since, renewable sources introduce relatively low voltage, it is necessary to step up the voltage in order to be used in regular applications. The proposed converter has employed a coupled inductor and a switched capacitor to step up the output voltage. An active clamp circuit has been adopted to guarantee...
This paper proposes the pulse width modulation (PWM) technique for the five-phase open-end winding induction motor (FPOEWIM) drive fed from five-phase dual inverter (FPDI) with a single dc source. The selected method gives the advantages of reduced switching losses specifically for induction motor drives working with higher power factors with the elimination of common-mode current (CMC). The method...
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