Partial PFC device and control method thereof
A control method and circuit technology, which are applied to some PFC devices for inverter air conditioner controllers and their control fields, can solve problems such as unsatisfactory effects, and achieve the effects of low device cost and reduced interference
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no. 1 example
[0051] see Figure 1-Figure 4 , a partial PFC device, including a bridge rectifier BD1, mains power, a current sampling circuit 1, a zero-crossing detection circuit 2, an inductor L1, a diversion diode D1, a diversion diode D2, a power electronic switch G1, and a voltage sampling circuit 4 , PFC drive circuit 3 and main control MCU5. Among them, the live line L of the mains is connected to the anode of the diversion diode D1, the AC input terminal AC1 of the rectifier bridge BD1, and a sampling point of the zero-crossing detection circuit 2; the neutral line N of the mains is connected to one end of the current sampling circuit 1 The other end of the current sampling circuit 1 is connected to one end of the inductor L1 and the sampling point of the zero-crossing detection circuit 2; the other end of the inductor L1 is connected to the anode of the steering diode D2 and the AC2 end of the rectifier bridge stack BD1; power electronics The current inflow terminal 2 of the switch...
no. 2 example
[0078] see Figure 5 and Figure 2-Figure 4 Part of the PFC device includes rectifier bridge stack BD1, mains power, current sampling circuit 1, zero-crossing detection circuit 2, inductor L1, diversion diode D1, diversion diode D2, power electronic switch G1, voltage sampling circuit 4, PFC drive Circuit 3 and main control MCU5. Among them, the live line L of the mains is connected with the cathode of the diversion diode D1, the AC input terminal AC1 of the rectifier bridge BD1, and a sampling point of the zero-crossing detection circuit 2; the neutral line N of the mains is connected with one end of the current sampling circuit 1 ; The other end of the current sampling circuit 1 is connected to one end of the inductor L1 and the sampling point of the zero-crossing detection circuit 2; the other end of the inductor L1 is connected to the cathode of the steering diode D2 and the AC2 end of the rectifier bridge stack BD1; power electronics The current output terminal 3 of the...
no. 3 example
[0081] see Figure 6 and Figure 2-Figure 4 Part of the PFC device includes rectifier bridge stack BD1, mains power, current sampling circuit 1, zero-crossing detection circuit 2, inductor L1, diversion diode D1, diversion diode D2, power electronic switch G1, voltage sampling circuit 4, PFC drive Circuit 3 and main control MCU5. Wherein, the live line L of the mains is connected to one end of the inductor L1 and a sampling point of the zero-crossing detection circuit 2; the other end of the inductor L1 is connected to the cathode of the diversion diode D1 and the AC input terminal AC1 of the rectifier bridge BD1; The neutral line N of the mains is connected to one end of the current sampling circuit 1; the other end of the current sampling circuit 1 is connected to the sampling point of the zero-crossing detection circuit 2, the cathode of the steering diode D2, and the AC2 end of the rectifier bridge stack BD1; the power electronics The current inflow terminal 2 of the swi...
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