Power factor correction converter and power factor correction conversion equipment
一种功率因数校正、转换器的技术,应用在交流功率输入变换为直流功率输出、直流功率输入变换为直流功率输出、输出功率的转换装置等方向,能够解决转换效率和功率密度低等问题,达到提高转换效率、减小纹波、电感量减少的效果
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Embodiment 1
[0027] like figure 1 As shown, the power factor correction converter provided by the embodiment of the present invention has two sets of bidirectional switches S1-S2, S3-S4, because the coil and the front bridge arm of the autotransformer T1 correspond to the bidirectional switches one by one, so In the embodiment of the present invention, both the coil and the front bridge arm of the autotransformer T1 are two, and in order to achieve a better technical effect, an autotransformer T1 with the same number of turns of the two coils is selected.
[0028] As a preferred solution, the power factor correction converter provided in this embodiment further includes a protection bridge arm, and the protection bridge arm includes two protection diodes D7 and D8 connected in series in the same direction, and the middle node between D7 and D8 and the boost inductor L1 The input terminals of the protective bridge arm are connected to each other, and the two ends of the protective bridge ar...
Embodiment 2
[0051] This embodiment is basically the same as Embodiment 1, the difference is: as Figure 10 As shown, in this embodiment, the boost inductor is integrated in the autotransformer. For low-power applications, the boost inductor can be integrated into the autotransformer, and the required boost inductor value can be obtained by adjusting the coupling coefficient M of the autotransformer, further reducing the size and cost of the converter.
Embodiment 3
[0053] This embodiment is basically the same as Embodiment 1, the difference is: as Figure 11 As shown, in this embodiment, two clamping capacitors C1 and C2 for suppressing common mode noise interference are also included. The other ends of the bit capacitors C1 and C2 are connected and connected to one end of the bus filter capacitor C3. The two clamping capacitors C1 and C2 can suppress electromagnetic interference, especially common-mode noise interference.
[0054] The embodiment of the present invention also provides a power factor correction conversion device, including the above-mentioned power factor correction converter, AC input grid and load; one end of the AC input grid is connected to the rear end of each group of bidirectional switches, and the other end of the AC input grid is connected to the The input terminals of the boost inductor are connected; the two ends of the load are respectively connected with the two ends of the bus filter capacitor corresponding...
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