A Frequency Shaking Design Method for Power Factor Correction Circuit of Server Power Supply
A technology of power factor correction and power supply, which is applied in the direction of output power conversion devices, high-efficiency power electronic conversion, electrical components, etc., to achieve the effects of enhancing competitiveness, reducing peak radiation, and reducing amplitude
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Embodiment 1
[0028] Such as figure 1 As shown, the frequency shaking design method of a server power supply power factor correction circuit of the present invention, it implements PWM frequency shaking on the power factor correction circuit by changing the switching period of the timer to realize the adjustment and shaking of the operating frequency of the server power converter , so as to achieve the purpose of reducing the peak radiation.
[0029] The frequency shaking design method is realized through the following specific steps:
[0030] 1) Set the counter period as two different switching periods, switching period 1 and switching period 2, and use switching period 1 and switching period 2 to control the power factor correction circuit;
[0031] 2) Calculate the power factor correction duty cycle and multiply it by switching period 1 and switching period 2 respectively, and then assign it to the comparison register;
[0032] 3) Change to another switching cycle value before the coun...
Embodiment 2
[0036] Another frequency shaking design method of the power factor correction circuit of the server power supply of the present invention, it adjusts the operating frequency of the power converter by changing the control mode (that is, changing the switching period of the timer), thereby realizing the shaking of the signal, so The frequency shaking design method described above includes the following steps:
[0037] 1) Set the counter period as two different switching periods of switching period 1 and switching period 2, and use switching period 1 and switching period 2 to perform frequency shaking control on the power factor correction circuit;
[0038] 2) Calculate the power factor correction duty cycle and multiply it by switching period 1 and switching period 2 respectively, and then assign it to the comparison register;
[0039] 3) Change to another switching cycle value before the counter count reaches 0, and the counter starts counting again at the same time.
[0040] ...
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