Electromagnetic compatibility filter

• Main Author: KANE AJIT W
• Format: Patent
• Language: Chinese; English
• Published: 11.10.2022
• 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 variable speed drive system is arranged to receive input power at a fixed input voltage amplitude and frequency and to provide power at a variable voltage and variable frequency. The variable speed drive (104) includes a converter (201, 206) connected to an AC source (102) to convert an input voltage to a boosted DC voltage. A DC link (204) connected to the converter (201, 206) filters the DC voltage from the converter stage. An inverter (206) converts the DC link voltage into variable voltage and variable frequency AC power. An electromagnetic compatibility (EMC) filter (50) includes a series RC circuit (51) from a phase to a ground circuit for each input phase of the converter. The RC circuit includes a resistor (54) connected in series with a capacitor (52) between the converter phase and ground (22). The EMC filter (50) is connected to the line side of the converters (201, 206). The inductor (16) is connected between the input source (102) and the EMC filter (50). 变速传动系统被布置以接收在固定的输入电压幅值和频率下的输入电力，且提供在可