scholarly journals Study on the Control Algorithm of Two-Stage DC-DC Converter for Electric Vehicles

2014 ◽  
Vol 6 ◽  
pp. 203793 ◽  
Author(s):  
Changhao Piao ◽  
Chao Jiang ◽  
Hongtao Qiao ◽  
Chongdu Cho ◽  
Sheng Lu
Keyword(s):  
Electric Vehicles ◽  
Control Algorithm ◽  
High Efficiency ◽  
Sliding Mode ◽  
Fast Response ◽  
Switching Frequency ◽  
Large Signal ◽  
Two Stage ◽  
Good Reliability ◽  
Simulation And Experiment

The fast response, high efficiency, and good reliability are very important characteristics to electric vehicles (EVs) dc/dc converters. Two-stage dc-dc converter is a kind of dc-dc topologies that can offer those characteristics to EVs. Presently, nonlinear control is an active area of research in the field of the control algorithm of dc-dc converters. However, very few papers research on two-stage converter for EVs. In this paper, a fixed switching frequency sliding mode (FSFSM) controller and double-integral sliding mode (DISM) controller for two-stage dc-dc converter are proposed. And a conventional linear control (lag) is chosen as the comparison. The performances of the proposed FSFSM controller are compared with those obtained by the lag controller. In consequence, the satisfactory simulation and experiment results show that the FSFSM controller is capable of offering good large-signal operations with fast dynamical responses to the converter. At last, some other simulation results are presented to prove that the DISM controller is a promising method for the converter to eliminate the steady-state error.

Adaptive PID Controller Based on Single Neuron

2012 ◽  
Vol 466-467 ◽  
pp. 981-985 ◽  
Author(s):  
Xin Yun Qiu ◽  
Yuan Gao
Keyword(s):  
Pid Controller ◽  
Control Algorithm ◽  
Single Neuron ◽  
Variable Parameter ◽  
Fast Response ◽  
Control Law ◽  
Parameters Tuning ◽  
Application Condition ◽  
Simulation And Experiment ◽  
New Type

An adaptive PID controller based on single neuron is proposed. The properties, control algorithm, parameters tuning, the control law and the application condition of the controller are studied in the paper. To satisfy the properties of the requirements of the control system in an electromotor group, such as a broad dynamic changing range, a fast response, a little overshoot and time-variable parameter, a new-type self-optimizing PID controller based on artificial neural networks is proposed and studied. It is verified that the controller has few adjustable parameters and excellent robust performance. The results of simulation and experiment prove that the controller is superior to the traditional PID controller.

scholarly journals Comprehensive Review on Main Topologies of Impedance Source Inverter Used in Electric Vehicle Applications

2020 ◽  
Vol 11 (2) ◽  
pp. 37 ◽  
Author(s):  
Daouda Mande ◽  
João Pedro Trovão ◽  
Minh Cao Ta
Keyword(s):  
Power Systems ◽  
Power Electronics ◽  
Electric Vehicles ◽  
High Efficiency ◽  
Current Source ◽  
Input Voltage ◽  
Industrial Applications ◽  
Voltage Source ◽  
Two Stage ◽  
And Performance

Power electronics play a fundamental role for electric transportation, renewable energy conversion and many other industrial applications. They have the ability to help achieve high efficiency and performance in power systems. However, traditional inverters such as voltage source and current source inverters present some limitations. Consequently, many research efforts have been focused on developing new power electronics converters suitable for many applications. Compared with the conventional two-stage inverter, Z-source inverter (ZSI) is a single-stage converter with lower design cost and high efficiency. It is a power electronics circuit of which the function is to convert DC input voltage to a symmetrical AC output voltage of desired magnitude and frequency. Recently, ZSIs have been widely used as a replacement for conventional two-stage inverters in the distributed generation systems. Several modifications have been carried out on ZSI to improve its performance and efficiency. This paper reviews the-state-of-art impedance source inverter main topologies and points out their applications for multisource electric vehicles. A concise review of main existing topologies is presented. The basic structural differences, advantages and limitations of each topology are illustrated. From this state-of-the-art review of impedance source inverters, the embedded quasi-Z-source inverter presents one of the promising architectures which can be used in multisource electric vehicles, with better performance and reliability. The utilization of this new topology will open the door to several development axes, with great impact on electric vehicles (EVs).

Modeling and implementation of fixed switching frequency sliding mode control to two-stage DC-DC converter

2014 ◽  
Vol 12 (6) ◽  
pp. 1225-1233 ◽  
Author(s):  
Changhao Piao ◽  
Chao Jiang ◽  
Hongtao Qiao ◽  
Chongdu Cho ◽  
Sheng Lu
Keyword(s):  
Sliding Mode Control ◽  
Sliding Mode ◽  
Switching Frequency ◽  
Two Stage ◽  
Mode Control

scholarly journals Switching frequency control method based on short prediction horizon control algorithm of Quasi-Z source inverter

2018 ◽  
Vol 2 (1) ◽  
pp. 1
Author(s):  
Shengchao Li ◽  
Sile Ma ◽  
Xiaojing Ma ◽  
Xiangyuan Jiang ◽  
Shuai Li
Keyword(s):  
Control Algorithm ◽  
Control Method ◽  
Frequency Control ◽  
Switching Frequency ◽  
Output Current ◽  
Prediction Horizon ◽  
Simulation And Experiment ◽  
The Relationship ◽  
Current Ripple

In order to overcome the problem of large inductance current ripple and poor output current quality caused by lower switching frequency in model predictive control (MPC). A short prediction horizon control algorithm is proposed, and the relationship between the prediction horizon and the switching frequency is analyzed, which also considered the influence of the switching frequency of the inverter. In the proposed algorithm the optimal vector is selected based on the historical switching state. Finally the proposed method can effectively reduce the inductor current ripple and improve the output current quality of the inverter, which is proved by simulation and experiment.

scholarly journals DC-DC Converter Topologies for Electric Vehicles, Plug-in Hybrid Electric Vehicles and Fast Charging Stations: State of the Art and Future Trends

Energies ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1569 ◽  
Author(s):  
Sajib Chakraborty ◽  
Hai-Nam Vu ◽  
Mohammed Mahedi Hasan ◽  
Dai-Duong Tran ◽  
Mohamed El Baghdadi ◽  
...  
Keyword(s):  
Low Power ◽  
Electric Vehicles ◽  
Electromagnetic Interference ◽  
Hybrid Electric Vehicles ◽  
High Efficiency ◽  
Switching Frequency ◽  
Fast Charging ◽  
Converter Topologies ◽  
Hybrid Electric ◽  
Charging Stations

This article reviews the design and evaluation of different DC-DC converter topologies for Battery Electric Vehicles (BEVs) and Plug-in Hybrid Electric Vehicles (PHEVs). The design and evaluation of these converter topologies are presented, analyzed and compared in terms of output power, component count, switching frequency, electromagnetic interference (EMI), losses, effectiveness, reliability and cost. This paper also evaluates the architecture, merits and demerits of converter topologies (AC-DC and DC-DC) for Fast Charging Stations (FCHARs). On the basis of this analysis, it has found that the Multidevice Interleaved DC-DC Bidirectional Converter (MDIBC) is the most suitable topology for high-power BEVs and PHEVs (> 10kW), thanks to its low input current ripples, low output voltage ripples, low electromagnetic interference, bidirectionality, high efficiency and high reliability. In contrast, for low-power electric vehicles (<10 kW), it is tough to recommend a single candidate that is the best in all possible aspects. However, the Sinusoidal Amplitude Converter, the Z-Source DC-DC converter and the boost DC-DC converter with resonant circuit are more suitable for low-power BEVs and PHEVs because of their soft switching, noise-free operation, low switching loss and high efficiency. Finally, this paper explores the opportunity of using wide band gap semiconductors (WBGSs) in DC-DC converters for BEVs, PHEVs and converters for FCHARs. Specifically, the future roadmap of research for WBGSs, modeling of emerging topologies and design techniques of the control system for BEV and PHEV powertrains are also presented in detail, which will certainly help researchers and solution engineers of automotive industries to select the suitable converter topology to achieve the growth of projected power density.

scholarly journals Haptics control of an arm exoskeleton for virtual reality using PSO-based fixed structure H∞ control

2019 ◽  
Vol 16 (3) ◽  
pp. 172988141984919 ◽  
Author(s):  
Chaiyaporn Silawatchananai ◽  
Manukid Parnichkun
Keyword(s):  
Virtual Reality ◽  
Control Algorithm ◽  
Fast Response ◽  
Control Performance ◽  
Proportional Integral Derivative ◽  
Load Cells ◽  
Simulation And Experiment ◽  
Fixed Structure ◽  
Virtual Impedance ◽  
Velocity Command

This article proposes a robust haptics control algorithm for an arm exoskeleton in virtual reality application that guarantees the robustness of the force displaying performance. The developed arm exoskeleton allows the user to sense the profile of virtual objects through joints at wrist, elbow, and shoulder. Forces exerted by the user are directly measured by load cells attached to the links, which are used to determine the corresponding velocity command based on virtual impedance. Due to the imperfection of modeling and the measurement noises from load cells and encoder quantization, the force displaying performance of the device tends to degrade with increasing oscillation, causing permanent damages to the device and user. To solve this problem, a Particle swarm optimization (PSO)-based fixed structure H∞ controller is proposed to control the developed arm exoskeleton. The control performance of the proposed controller is evaluated by both simulation and experiment. The results show that the proposed controller can achieve better tracking performance in comparison with proportional–integral–derivative controller in terms of less oscillation and fast response.

scholarly journals Design and Implementation of Improved High Step-Down DC-DC Converter for Electric Vehicles

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4206
Author(s):  
Dong-Ryeol Park ◽  
Yong Kim
Keyword(s):  
Electric Vehicles ◽  
High Efficiency ◽  
Low Voltage ◽  
Switching Frequency ◽  
Switching Loss ◽  
High Switching Frequency ◽  
Voltage Stress ◽  
Power Switches ◽  
Step Down ◽  
Secondary Side

An improved high step-down DC-DC converter for charging the batteries in an electric vehicle application is proposed in this paper. It adopts the topology of the conventional full-bridge converter, which has a coupled inductor current-doubler rectifier as the secondary side of the transformer. In addition, four power switches are driven using a phase-shifting technique. The proposed converter can achieve a high step-down voltage with low-voltage stress on the rectifier diodes. In addition, the coupled inductor current-doubler rectifier of the secondary side can reduce the ripple current and losses of the secondary side to achieve high efficiency. Furthermore, the proposed converter can overcome the drawbacks of the conventional full-bridge converter, such as switching loss caused by high switching frequency, duty-cycle loss, voltage stress, and numerous components, and can increase the efficiency with the soft-switching technique. A 600 W laboratory prototype of the proposed converter was manufactured. The results of the experiments performed with the prototype proved the effectiveness and validated the use of the proposed converter for better charging of electric vehicles.

Coordination Control of Microgrid using Sliding Mode Controller

2019 ◽  
Vol 1 (3) ◽  
pp. 57-64
Author(s):  
Geetha T ◽  
Chitra S
Keyword(s):  
High Efficiency ◽  
Sliding Mode ◽  
Synchronous Generator ◽  
Switching Frequency ◽  
Sliding Mode Controller ◽  
Renewable Energy Resources ◽  
Constant Frequency ◽  
Grid Synchronization ◽  
Point Tracking ◽  
System A

Traditional power generation and consumption are undergoing major transformation. One of the tendencies is to integrate microgrid into the distribution network with high penetration of renewable energy resources. A synchronous generator and a PV farm supply power to the system’s AC and DC sides, respectively. A DC/DC boost converter with a maximum power point tracking (MPPT) function is implemented to maximize the energy generation from the PV farm. In the existing system a model predictive power and voltage control (MPPVC) method is developed for the AC/DC interlinking converter this has a drawback in smooth grid synchronization. But in the proposed system a sliding mode controller is used to link the AC bus with the DC bus while regulating the system voltage and frequency and it ensures smooth power transfer between the DC and AC sub grids. Meanwhile, smooth grid synchronization and connection can be achieved. Proposed constant frequency sliding mode control retains the advantages of good dynamic response as in hysteresis control, better reference tracking switching frequency and less sensitivity to parameter variations and non liner loads.  From the Simulation results it is verified that the proposed topology is coordinated for power management in both AC and DC sides under critical loads with high efficiency, reliability, and robustness under both grid-connected and islanding modes.

A novel coordinated control algorithm for distributed driving electric vehicles

2017 ◽  
Vol 50 (4-6) ◽  
pp. 405-421
Author(s):  
Shixin SONG ◽  
Wanchen SUN ◽  
Feng XIAO ◽  
Silun PENG ◽  
Jingyu AN ◽  
...  
Keyword(s):  
Electric Vehicles ◽  
Control Algorithm ◽  
Coordinated Control
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