Bridged Power Factor Controller for AC-DC Converters
A technology of AC-DC conversion and power factor, which is applied in the direction of conversion of AC power input to DC power output, output power conversion device, high-efficiency power electronic conversion, etc., and can solve the problem of complex detection circuit of AC-DC converter and inaccurate power factor control and other issues to achieve the effect of simplifying circuit complexity and reducing hardware cost
Active Publication Date: 2016-12-21
上海儒竞自动控制系统有限公司
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Problems solved by technology
[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a bridged power factor controller for an AC-DC converter, which is used to solve the problem of the complex detection circuit of the AC-DC converter in the prior art and its power factor Inaccurate control problems
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[0041] 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.
[0042] see Figure 1 to Figure 2 . 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 sa...
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The invention provides a bridge power factor controller of an AC-DC converter. The bridge power factor controller at least comprises a detection unit and a control unit. The detection unit is used for detecting a first detection electrical signal of the input end to the ground, detecting a second detection electrical signal of a controlled switch to the ground and detecting a third detection electrical signal of the output end to the ground. The control unit is used for calculating the inductance value and the instantaneous current value of an inductor and the instantaneous current value of a load of the AC-DC converter based on the first detection electrical signal, the second detection electrical signal and the third detection electrical signal, carrying out control operation based on the first detection electrical signal, the third detection electrical signal, the instantaneous current value of the inductor and the instantaneous current value of the load to change the duty ratio of a pulse signal, and transmitting the pulse signal to the controlled switch. The inductance value and the instantaneous current value of the inductor can be obtained without the need to arrange a sensor, and the control complexity of the AC-DC converter is effectively simplified.
Description
technical field [0001] The invention relates to a bridged power factor controller, in particular to a bridged power factor controller for an AC / DC converter. Background technique [0002] With the popularization and application of frequency conversion home appliances, single-phase AC-DC converters have been widely used. Traditional single-phase AC-DC converters based on diode rectifier bridges are nonlinear loads. If power factor correction (PFC) is not performed, the harmonic current pollution in the grid will definitely be aggravated. It is precisely because of the suppression of harmonic current that the power factor correction technology has been widely studied and applied. Traditional power factor correction controllers use various sensors and their detection circuits to measure circuit information, especially: inductor current, input AC voltage and output DC voltage. However, too many sensors and detection circuits increase the complexity of the circuit and reduce th...
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IPC IPC(8): H02M1/42H02M7/217
CPCY02B70/10
Inventor 邱海陵朱元庆朱延彬刘极上王立军
Owner 上海儒竞自动控制系统有限公司