Single-phase voltage regulating sine wave variable frequency inverter power supply
A sine wave frequency conversion and inverter power supply technology, applied in electrical components, high-efficiency power electronic conversion, irreversible DC power input conversion to AC power output and other directions, can solve problems such as large harmonic distortion, insufficient power, and high price. , to achieve the effect of improving power factor, limiting current distortion and harmonic damage, and strong adaptability
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Embodiment 1
[0033] refer to Figure 1 to Figure 7 , this embodiment provides a single-phase voltage regulation sine wave frequency conversion inverter power supply, including a switching power supply module 1, an auxiliary switching power supply module 2, a power factor compensation boost module 3, a switching power supply isolation power conversion module 4, a standard sine wave and SPWM signal generation module 5, sine wave inverter and power conversion module 6, signal detection and display module 7;
[0034] Such as figure 1 As shown, the switching power supply module 1 includes a short circuit protection circuit 11 , an EMI circuit 12 , an EMI circuit 13 , a rectification and filtering circuit 14 and a rectification and filtering circuit 15 . Such as figure 2As shown, the protection circuit 11 includes a fuse F1, a resistor Rt1 and a resistor Rv1, the fuse F1 acts as a short-circuit protection, the resistor Rt1 is a negative temperature coefficient thermistor, which reduces the im...
Embodiment 2
[0055] (1) if Figure 8 to Figure 20 , on the basis of the first embodiment above, this embodiment adds a central control microprocessor, a liquid crystal display screen, a keyboard circuit, an extended terminal block P18, an extended terminal block P19, an extended terminal block P22, a power supply display circuit, and an acousto-optic indicator circuit , DAC control signal generation circuit, variable frequency sine wave input detection circuit 7, mains input AC voltage and current power detection circuit, output variable frequency voltage and current power detection circuit, output DC voltage and current power detection circuit.
[0056]The frequency conversion sine wave input detection circuit 7 includes a precision full-wave rectification circuit 71, a standby control comparator 72, and a digital frequency meter 71. The precision full-wave rectification circuit 71 is composed of IC22 and its peripheral circuits, and adopts a single power supply amplifier circuit, so it ne...
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