A Single-Phase / Three-Phase Transformer Designed for Voltage Detection Unit of 400Hz Converter Excitation Regulator

2014 ◽  
Vol 1006-1007 ◽  
pp. 967-971
Author(s):  
Yang Lv ◽  
Jun Hong Zhang ◽  
Jing Hong Zhao
Keyword(s):  
Single Phase ◽  
Response Speed ◽  
Obvious Effect ◽  
Ac Motor ◽  
Ac Power ◽  
Three Phase ◽  
Detection Circuit ◽  
Excitation Regulator ◽  
Filter Capacitor ◽  
Detection Unit

Design a single-phase / three-phase transformer designed for voltage detection unit of 400Hz frequency ship converter excitation regulator. Transformer has asimilar structure to AC motor, but the rotor is fixed, a single-phase AC power pass into the rotor and three-phase alternating current generated in the stator side. The transformer is used to the detection circuit of voltage regulator , so that the filter capacitor can be reduced, thereby reducing the latency of signal feedback and improve the response speed of the excitation regulator. The experimental results show that, the transformer has obvious effect on improving the response speed of the circuit.

scholarly journals Design and Experimental Research of Agricultural Low Power Singlephase Frequency Conversion Control System Based on SPWM

2015 ◽  
Vol 9 (1) ◽  
pp. 490-495
Author(s):  
Chuanlai Yuan ◽  
Lingshuang Kong ◽  
Can Hu ◽  
Weilong Zhou
Keyword(s):  
Low Power ◽  
Power Supply ◽  
Rational Design ◽  
Single Phase ◽  
Frequency Conversion ◽  
Frequency Converter ◽  
Ac Motor ◽  
Ac Power ◽  
Three Phase ◽  
Power Frequency

In the countryside of China, the main power supply mode is 220V single-phase power, which affects the widely application of three-phase agricultural appliances. What’s more, it means a block to the development of modern agriculture. However, frequency converter technique research is focused on three-phase high power frequency conversion technology at present, and there are very few achievements on the agricultural low power single-phrase frequency conversion research. In this paper, considering the difficulty of widely application of agricultural low power three-phase AC motor because it is not easy to obtain the three-phase power supply, a three-phase AC frequency conversion system under the condition of agricultural 220V single-phase AC power is designed, which can achieve the stepless regulation of the voltage amplitude and guarantee the widely use of the three-phase AC motor under the condition of agricultural 220V singlephase AC power. The experimental results show that the system can output the controlled three-phase AC power when the input is 220V single-phase AC power. And the rational design of the system hardware also provides the technical support for the application of agricultural low power frequency conversion.

Control of Three-Phase Inverter for AC Motor Drive With Small DC-Link Capacitor Fed by Single-Phase AC Source

2014 ◽  
Vol 50 (2) ◽  
pp. 1074-1081 ◽  
Author(s):  
Hyun-Sam Jung ◽  
Seung-Jun Chee ◽  
Seung-Ki Sul ◽  
Young-Jae Park ◽  
Hyun-Soo Park ◽  
...  
Keyword(s):  
Single Phase ◽  
Motor Drive ◽  
Phase Inverter ◽  
Ac Motor ◽  
Three Phase ◽  
Three Phase Inverter

Impact of Reduced Share of Rotary Frequency Converters in a Low Frequency Synchronous Railway Grid: A Transient Stability Study

2019 ◽  
Author(s):  
John Laury ◽  
Lars Abrahamsson ◽  
Math Bollen
Keyword(s):  
Transient Stability ◽  
Single Phase ◽  
Low Frequency ◽  
Oscillatory Behavior ◽  
Rotational Inertia ◽  
Electrical Machine ◽  
Frequency Converters ◽  
Railway Traffic ◽  
Ac Power ◽  
Three Phase

Most low-frequency AC single-phase railway grids have both power-electronic based Static Frequency Converters (SFCs) and electrical-machine based Rotary Frequency Converters (RFCs) connecting them to the three-phase public grid. Already today, in some such grids, a majority of the power conversion is from SFCs. As railway traffic (and thus power demand) increases, more SFCs are installed for capacity increase, while the number of RFCs remains (almost) constant. Thus, the share of SFCs is expected to increase, and the ratio of installed rotational inertia over installed power to decrease. This paper investigates how different shares of SFCs affect the transient stability of low-frequency AC railway grids when having a mix of RFCs and SFCs converting three-phase AC power to single-phase AC power. Results from numerical simulations of the interactions that occur between converters when and after the grid is subject to a fault are presented. The numerical studies show that with an increased share of SFCs there is an increased oscillatory behavior, for example in the voltage magnitude and active power after fault clearance.

scholarly journals A Review on Flicker-Free AC–DC LED Drivers for Single-Phase and Three-Phase AC Power Grids

2019 ◽  
Vol 34 (10) ◽  
pp. 10035-10057 ◽  
Author(s):  
Ignacio Castro ◽  
Aitor Vazquez ◽  
Manuel Arias ◽  
Diego G. Lamar ◽  
Marta M. Hernando ◽  
...  
Keyword(s):  
Single Phase ◽  
Power Grids ◽  
Ac Power ◽  
Three Phase ◽  
Led Drivers
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