Constant-switching-frequency control of switch-mode rectifiers without current sensors

2000 ◽  
Vol 47 (5) ◽  
pp. 1172-1174 ◽  
Author(s):  
Yu-Kang Lo ◽  
Huang-Jen Chiu ◽  
Sheng-Yuan Ou
Keyword(s):  
Frequency Control ◽  
Switching Frequency ◽  
Switch Mode ◽  
Current Sensors

scholarly journals Analysis and Implementation of a Frequency Control DC–DC Converter for Light Electric Vehicle Applications

Electronics ◽  
2021 ◽  
Vol 10 (14) ◽  
pp. 1623
Author(s):  
Bor-Ren Lin
Keyword(s):  
Electric Vehicles ◽  
Output Voltage ◽  
Frequency Control ◽  
Input Voltage ◽  
Pulse Frequency ◽  
Switching Frequency ◽  
Battery Charger ◽  
Dc Microgrid ◽  
Load Voltage ◽  
Transportation Vehicle

In order to realize emission-free solutions and clean transportation alternatives, this paper presents a new DC converter with pulse frequency control for a battery charger in electric vehicles (EVs) or light electric vehicles (LEVs). The circuit configuration includes a resonant tank on the high-voltage side and two variable winding sets on the output side to achieve wide output voltage operation for a universal LEV battery charger. The input terminal of the presented converter is a from DC microgrid with voltage levels of 380, 760, or 1500 V for house, industry plant, or DC transportation vehicle demands, respectively. To reduce voltage stresses on active devices, a cascade circuit structure with less voltage rating on power semiconductors is used on the primary side. Two resonant capacitors were selected on the resonant tank, not only to achieve the two input voltage balance problem but also to realize the resonant operation to control load voltage. By using the variable switching frequency approach to regulate load voltage, active switches are turned on with soft switching operation to improve converter efficiency. In order to achieve wide output voltage capability for universal battery charger demands such as scooters, electric motorbikes, Li-ion e-trikes, golf carts, luxury golf cars, and quad applications, two variable winding sets were selected to have a wide voltage output (50~160 V). Finally, experiments with a 1 kW rated prototype were demonstrated to validate the performance and benefits of presented converter.

scholarly journals Variable Switching Frequency Control of Distributed Resources for Improved System Efficiency

2018 ◽  
Vol 54 (5) ◽  
pp. 4612-4620 ◽  
Author(s):  
Jose M. Cano ◽  
Angel Navarro-Rodriguez ◽  
Andres Suarez ◽  
Pablo Garcia
Keyword(s):  
Frequency Control ◽  
Switching Frequency ◽  
System Efficiency ◽  
Distributed Resources

A 17-Level Switched Voltage Source Multi-Level Inverter Topology with Low-Switching Frequency Control

2016 ◽  
Vol 44 (19) ◽  
pp. 2185-2197 ◽  
Author(s):  
Charles Ikechukwu Odeh ◽  
Linus Uchechukwu Anih ◽  
Emenike Chinedozi Ejiogu
Keyword(s):  
Frequency Control ◽  
Voltage Source ◽  
Switching Frequency ◽  
Multi Level ◽  
Inverter Topology
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