Single-phase rectification circuit capable of controlling capacitor filtering
A technology of single-phase rectification and capacitor filtering, applied in the direction of irreversible AC power input conversion to DC power output, electrical components, output power conversion devices, etc., can solve the problem of low efficiency in suppressing power harmonic currents, and achieve harmonic suppression wave current, easy control, and high power factor
Inactive Publication Date: 2014-06-04
SHANGHAI RUKING ELECTRONICS
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[0021] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0022] see figure 1 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the same time, term...
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The invention provides a single-phase rectification circuit capable of controlling capacitor filtering. The single-phase rectification circuit comprises a filer circuit and a rectification circuit. The filter circuit includes an inductor and a bilateral switch; the input terminal of the inductor is connected with a live wire of a single-phase alternating current; and the bilateral switch has a first connecting terminal and a second connecting terminal, wherein the first connecting terminal is connected with a zero line of the single-phase alternating current and the second connecting terminal is connected with the output terminal of the inductor by a filter capacitor. The rectification circuit includes a rectifier bridge that is respectively connected with the filter circuit and the zero line of the single-phase alternating current; the rectifier bridge is a two-arm diode rectifier bridge; one arm of the two-arm diode rectifier bridge is connected with a common terminal of the inductor and the bilateral switch and the other arm is connected with the zero line of the single-phase alternating current and one end of the bilateral switch, and the filter capacitor is connected with the bidirectional switch in series; and the two-arm diode rectifier bridge forms a direct-current output positive terminal and a direct-current output negative terminal. Besides, the rectification circuit also includes a first electrolytic capacitor and a first voltage-stabilizing resistor. With the circuit, harmonic current inhibition and power factor improvement can be effectively realized; and the harmonic current inhibition efficiency can be enhanced.
Description
technical field [0001] The invention relates to the technical field of power electronic devices, in particular to a single-phase rectifier circuit with controllable capacitor filtering. Background technique [0002] Power Electronic Devices, also known as power semiconductor devices, are mainly used for high-power electronic devices in power conversion and control circuits of power equipment (usually referring to currents of tens to thousands of amps and voltages of hundreds of volts or more. ). All kinds of power electronic devices have two working characteristics of conduction and blocking. A power diode is a two-terminal (cathode and anode) device, and its device current is determined by the volt-ampere characteristics. In addition to changing the voltage applied between the two terminals, the anode current cannot be controlled, so it is called an uncontrollable device. Ordinary thyristors are three-terminal devices, and their gate signals can control the conduction of ...
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Inventor 刘明霖唐飞军王立军游业斌荣志杰吴伦兵
Owner SHANGHAI RUKING ELECTRONICS