SPWM pulse generating and distributing circuit for pure sine wave inverter
A technology of inverter power supply and pure sine wave, applied in the field of SPWM pulse generation and distribution circuit, can solve the problems of high cost, interference of electrical equipment, large volume, etc., and achieve the effect of reducing production cost
Inactive Publication Date: 2010-12-08
SUZHOU DAHE ENERGY TECH
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Problems solved by technology
At present, most of the inverter power products commonly used in the world and at home are modified wave, that is, the improved type of square wave, which has great interference to electrical equipment; the pure sine wave inverter power produced by very few manufacturers is due to the use of more complex single-chip microcomputers. And the hardware drive circuit makes the equipment volume relatively large and the cost is relatively high, which affects the promotion and use of pure sine wave inverter power supply
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[0011] Such as figure 1 As shown, the SPWM pulse generation and distribution circuit is mainly composed of pulse generation circuit 1 connected to pulse distribution circuit 2. SPWM pulse generation circuit 1 is a PIC16F716 microcontroller, pulse distribution circuit 2 is a NAND gate; the output of the second NAND gate U2 is connected Enter the two input ends of the third NAND gate U3, the output of the fourth NAND gate U4 is connected to the two input ends of the fifth NAND gate U5, and the output of the sixth NAND gate U6 is connected to the seventh NAND gate The two input terminals of U7, the output of the eighth NAND gate U8 is connected to the two input terminals of the ninth NAND gate U9, the 9th pin of the PIC16F716 microcontroller generates a half-sine SPWM waveform, and the 11th pin of the microcontroller generates the ninth half-wave SPWM waveform. The pin is opposite and the dead zone SPWM waveform is added. The 8th pin of the single-chip microcomputer or any I / O port...
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It consists of SPWM impulse generation (IG) circuit and impulse distribution (ID) circuit. IG is a single chip processing unit PIC16F716. ID are NAND gates. The 9th pin of the processing unit generates a sine SPWM half-wave and its 11th pin generates SPWM wave. The 8th pin or any I / O end of the processing unit generates the rectangle wave which frequency the user needs exactly. The 8th, the 9th and the 11th pins are connected to the NAND gates. The three basic waves, generated by IG and converted by IG, form four SPWM impulse groups to drive the power devices of the full bridge circuit to obtain a pure sine inversion power supply. This practical new model offers a hi-efficiency and simple SPWM impulse generating and distributing circuit. It ensures the pure sine inversion power supply miniature and reduces the cost.
Description
Technical field [0001] The invention relates to an SPWM pulse generation and distribution circuit of a pure sine wave inverter power supply. Background technique [0002] With the development of technology and economy, the country attaches great importance to the green energy industry, and more and more places begin to use solar power and wind power equipment. At the same time, with the rapid development of the automotive industry, there is an increasing demand for AC power supply for vehicle electrical equipment. At present, most of the inverter power products commonly used at home and abroad are modified waves, namely square waves, which have greater interference to electrical equipment; very few manufacturers produce pure sine wave inverter power supplies because of the use of more complex single-chip microcomputers. And the hardware drive circuit makes the equipment larger and higher cost, which affects the popularization and use of pure sine wave inverter power supply. Sum...
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IPC IPC(8): H02M7/48H02M1/08
Inventor 张强胜
Owner SUZHOU DAHE ENERGY TECH