Digital-control voltage stabilization inverter

• Main Authors: MAN CHUNSHUI, SHI RUI, LI CHENGWEN, WANG ZHIYUAN, MIAO ZHIFEI, SHANG TIANDE
• Format: Patent
• Language: English
• Published: 07.01.2015
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The utility model relates to a digital-control voltage stabilization inverter, specifically the inverter which is high in power factor and precise in output voltage. The inverter comprises an active PFC power factor correction circuit, a full-bridge inversion circuit, and a digital control system. The main circuit of the inverter consists of the active PFC power factor correction circuit and the full-bridge inversion circuit. The digital control system employs a digital signal controller dsPIC30F3011 as a core control unit. The full-digitization PWM (digital control system) is achieved through a drive system of the full-bridge inversion circuit, and the double-loop control of an outer loop of an output voltage and an inner loop of a current is achieved. A man-machine interaction system displays the output voltage in real time, and a rigorous overcurrent, overvoltage/undervoltge and overheat protection circuit effectively guarantees the reliable operation of the inverter. In addition, the inverter also comprises current and voltage sample circuits which transmit signals to the digital signal controller dsPIC30F3011 through the connection of an auxiliary circuit and a signal conditioning circuit. The adjustment and control of a main circuit system are achieved through the combination of the drive circuit.