Constant Current/Voltage Charging Operation for Series-Series and Series-Parallel Compensated Wireless Power Transfer Systems Employing Primary-Side Controller

Song, Kai; Jiang, Jinhai; Zhu, Chunbo

doi:10.1109/tpel.2017.2767099

Cited by 239 publications

(92 citation statements)

References 43 publications

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“…Finally, the proposed method can predict R L,eq , M 12 , I bat , and V bat , and does not need a high sampling frequency to measure AC voltage and current, similar to previous studies [14][15][16][17][18][19].…”

Section: Load Estimation Methods Using the Magnitue Of Input Impedancesupporting

confidence: 69%

“…However, ESRs in CV mode are also difficult to ignore, and if f CV1 and f CV2 deviate too much from f o , the system efficiency also drastically decreases [14]. Therefore, the proposed WPT circuit still operates at f = f o in CV mode, and the φ to maintain the CV output is compensated by using the PI controller, which can be calculated as…”

Section: Control Methods Of the S-s Wpt Circuit For Battery Chargingmentioning

confidence: 99%

“…However, this method cannot follow the load conditions after initial energy injection. All of these methods [14][15][16][17][18][19] can estimate the load conditions well, so they should be able to sense the high-frequency AC input voltage and current. The resonant frequency of the WPT circuit can be up to several hundred kilohertz, so the sampling frequency should be much higher than the resonant frequency; as a result, the analog-to-digital conversion is difficult.…”

Section: Introductionmentioning

confidence: 99%

“…To eliminate the necessity for wireless communication, several load estimation methods have been presented [14][15][16][17][18][19]. The methods in [14][15][16] predict the load resistance R L by using the information of the input voltage and current. However, these methods should know the value of the coupling state before estimating the load conditions, so they cannot be used for various coil alignments.…”

Section: Introductionmentioning

confidence: 99%

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Wireless Battery Charging Circuit Using Load Estimation without Wireless Communication

et al. 2019

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A wireless battery charging circuit is proposed, along with a new load estimation method. The proposed estimation method can predict the load resistance, mutual inductance, output voltage, and output current without any wireless communication between the transmitter and receiver sides. Unlike other estimation methods that sense the high-frequency AC voltage and current of the transmitter coil, the proposed method only requires the DC output value of the peak current detection circuit at the transmitter coil. The proposed wireless power transfer (WPT) circuit uses the estimated parameters, and accurately controls the output current and voltage by adjusting the switching phase difference of the transmitter side. The WPT prototype circuit using a new load estimation method was tested under various coil alignment and load conditions. Finally, the circuit was operated in a constant current and constant voltage modes to charge a 48-V battery pack. These results show that the proposed WPT circuit that uses the new load estimation method is well suited for charging a battery pack.

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Section: Load Estimation Methods Using the Magnitue Of Input Impedancesupporting

confidence: 69%

Section: Control Methods Of the S-s Wpt Circuit For Battery Chargingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wireless Battery Charging Circuit Using Load Estimation without Wireless Communication

et al. 2019

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“…In order to realize the constant current output of the secondary side, active impedance matching circuits are needed for the receiver [19], [20]. At present, the active impedance matching circuits generally consist of DC-DC converters, AC-DC converters or a combination of both.…”

Section: Impedance Matching and Efficiency Model For Conventionalmentioning

confidence: 99%

A Cascaded Topology and Control Method for Two-Phase Receivers of Dynamic Wireless Power Transfer Systems

Jiang

Song

et al. 2020

IEEE Access

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In a dynamic wireless power transfer (DWPT) system for electric vehicles, bipolar transmitting rail is often implemented to improve the misalignment tolerance, but its constraint often lies in fluctuating output. This problem can be mitigated by applying two-phase receivers which, due to its structural characteristics in the impedance matching circuit, bring two new problems: limited range of impedance matching and low efficiency. This paper aims to tackle the two problems by introducing a cascaded topology and its control method. Firstly, the conventional topology of the two-phase receiver is thoroughly analyzed theoretically concerning impedance matching range and efficiency model. Secondly, a cascaded bridgeless rectifier-Buck (CBRB) as impedance matching with 0∼ ∞ matching capabilities is put forward. Besides, the independent two-channel structure is also introduced leaving the output current ratio the key to efficiency optimization. Thirdly, the control method for the proposed topology using heuristic current ratio by adopting online estimation via auxiliary measurement coils is presented. Finally, experiments are verified on a 20 kW DWPT platform and the proposed topology and control method can raise the transfer efficiency by 3.3% compared with the conventional topology. INDEX TERMS Cascaded bridgeless rectifier-Buck, heuristic current ratio, impedance matching, two-phase receivers, dynamic wireless power transfer.

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Wireless power transfer system with dual‐frequency operation in transmitter side for motor control application

Büyük

2022

Circuit Theory & Apps

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In this paper, a transmitter‐side control method is proposed in inductive wireless power transfer (I‐WPT) model for the speed and power control of a single‐phase induction motor (SPIM). Resonant tanks with an electronic driving mechanism are used in the proposed configuration. The receiver side employs two resonant circuits with two full wave rectifiers, comparator, and two gate drivers for the management of the motor speed and power. The resonant circuits and electronic motor drive are presented through detailing the mathematical model and system design. In addition, a comparative section of the proposed model with the previous art is introduced to address the contributions of the paper. Moreover, a prototype model of the proposed topology has been created in simulation environment and tested in a variety of scenarios. The proposed I‐WPT model has a power rating of 140 W, whereas the SPIM has a power rating of 120 W. At full power operation, a 130 W power is supplied from the source during 118 W power consumption of SPIM, indicating that the system's efficiency is over 90%. The motor speed control has been tested by lowering the operation frequency of the motor terminal voltage from 60 to 40 Hz and from 40 to 20 Hz. The dynamic motor power has been also analyzed by reducing the load power from 100% to 70%. The findings reveal that the proposed transmitter‐side controlled I‐WPT system operates in a wide range of circumstances.

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Constant Current/Voltage Charging Operation for Series-Series and Series-Parallel Compensated Wireless Power Transfer Systems Employing Primary-Side Controller

Cited by 239 publications

References 43 publications

Wireless Battery Charging Circuit Using Load Estimation without Wireless Communication

Wireless Battery Charging Circuit Using Load Estimation without Wireless Communication

A Cascaded Topology and Control Method for Two-Phase Receivers of Dynamic Wireless Power Transfer Systems

Wireless power transfer system with dual‐frequency operation in transmitter side for motor control application

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