The power factor improvement and pam control circuit according to supply voltage frequency for inverter system

The present invention relates to a power factor correction and farm control circuit according to the supply voltage frequency of the inverter system, the prior art has a problem in that deulyeoya continue to receive the input voltage, because it does not remember the waveform of the input voltage in the analog power factor improving part , to the power factor improving one using dedicated Damn, (IC) of the analog type, it Damn, the peripheral circuit is very complex, by requiring such secondary winding there is a very big problem burden in terms of price, micro dedicated Damn, analog type there is a problem wonchiphwa impossible to put on your computer. Thus, the present invention is a rectification part (61) to create a DC voltage by rectifying the input AC power supply, and the choke coil 62 and smoothing capacitor 63 for removing an AC component from the DC voltage of the rectification part 61, the flat a switching element that was again converted to AC power on the 3 controls charging and discharging operations of the inverter 64 and the smoothing capacitor 63 to be supplied to the motor (M) a direct-current voltage output from the capacitor (63) ( and Q1), and the zero voltage detector 65 for detecting a point (zERO pOINT) of the input AC power zero, the voltage level detector 67 for detecting the voltage across both ends of the smoothing capacitor 63, the the pulse data and the voltage level detector 67 of the store data for the sine wave of the input AC power source and the ROM 66 that the, the ROM 66 corresponding to the zero voltage detection from the zero voltage detector (65) multiplying the pulse width determination coefficient (fACTOR) according to the detected level And the power factor control and palm function controller 68 for the output of the controlled pulse width, the driving unit 69 for controlling the on / off operation of the switching element (Q1) in accordance with the pulse output from the controller 68, a digital by implementing a circuit, which will allow to make by storing in advance in the storage element to a sine wave to the input power, it does not require the peripheral circuit and the circuit can be implemented simply, because it is easy with this microcomputer flame cheap.