A buck-structure regulated power supply with wide-range AC voltage input
A technology of AC voltage and regulated power supply, which is applied in the direction of irreversible AC power input conversion to DC power output, DC power input conversion to DC power output, output power conversion device, etc., which can solve the problem of high cost and regulated power supply structure Complexity and other issues, to achieve the effect of improving efficiency and simplifying design
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specific Embodiment approach 1
[0025] Specific implementation mode one: combine figure 1 Describe this embodiment, a wide-range AC voltage input Buck structure stabilized power supply described in this embodiment, it includes a three-phase alternator 1, a three-phase rectification circuit 2, a relay, a diode D0, a rectification filter capacitor 3, a bus Voltage detection circuit 4, DC / DC converter 5, current detection circuit 6, output filter capacitor 7, output voltage detection circuit 8, rectification mode control circuit 9, starting power supply 10, drive circuit 11 and voltage and current closed-loop control circuit 12;
[0026] The three-phase AC signal output terminal of the three-phase AC generator 1 is connected to the three-phase AC signal input terminal of the three-phase rectifier circuit 2;
[0027] The DC output positive pole of the three-phase rectification circuit 2 is connected to one end of the rectification filter capacitor 3, one end of the bus voltage detection circuit 4, the positive p...
specific Embodiment approach 2
[0040] Specific implementation mode two: combination figure 2 with image 3 Describe this implementation mode, this implementation mode is a further definition of a wide-range AC voltage input Buck structure regulated power supply described in the first specific embodiment;
[0041] The rectification mode control circuit 9 includes resistors R6 to R10, a comparator and a first N-channel MOS transistor M1;
[0042] One end of the resistor R6 is connected with one end of the resistor R7, one end of the resistor R10 and the positive signal input end of the comparator;
[0043]The other end of the resistor R7, one end of the resistor R9, and the source of the first N-channel MOS transistor M1 are simultaneously connected to the power ground of the DC power supply Vc;
[0044] The other end of the resistor R9 and one end of the resistor R8 are simultaneously connected to the reverse signal input end of the comparator, and the signal output end of the comparator is connected to t...
specific Embodiment approach 3
[0053] Specific implementation mode three: combination Figure 4 Describe this implementation mode, this implementation mode is a further definition of a wide-range AC voltage input Buck structure regulated power supply described in the first specific embodiment;
[0054] The starting power supply 10 includes resistors R11 to R18, an N-channel MOS transistor M2, a third N-channel MOS transistor M3, a fourth N-channel MOS transistor M4, a voltage regulator transistor Z1 to a voltage regulator transistor Z4, a diode D7, Diode D8 and capacitor C3;
[0055] One end of the resistor R11 is connected to one end of the resistor R14 and one end of the resistor R15 at the same time;
[0056] The other end of the resistor R11 is connected to the drain of the N-channel MOS transistor M2, and the gate of the N-channel MOS transistor M2 is connected to one end of the resistor R12, the cathode of the voltage regulator transistor Z1, and one end of the resistor R13;
[0057] The source of t...
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