Method and device for generating three-phase voltage

• Main Authors: PHILLIPS RICHARD, SIMON DAVID HART, WOOLMER TIM, AHERN SAMUEL DAVID
• Format: Patent
• Language: Chinese; English
• Published: 20.05.2022
• 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; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROL OR REGULATION THEREOF; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The invention relates to a method and a device for generating a three-phase voltage. Techniques are described for reducing DC ripple voltage in an inverter by determining a plurality of switching events for each of three phases in each pulse width modulation (PWM) cycle. The switching event provides a desired target output voltage for a respective PWM cycle. According to this determination of switching events, a comparison may be made to determine a first time period (T1) between the first switching event and the second switching event across all phases, and a second time period (T2) between the second switching event and the third switching event across all phases. In response to the determined time period being greater than a threshold, a timing of one or more switching events in only one of the phases in the respective PWM period is adjusted to reduce the determined first time period or second time period. 本发明涉及用于产生三相电压的方法和装置。描述了通过为在每个脉冲宽度调制(PWM)周期中的三个相中的每一个确定多个切换事件来降低逆变器中的DC纹波电压的技术。切换事件为相应的PWM周期提供期望的目标输出电