MULTI-FREQUENCY UNIFORMIZATION CARRIER WAVE SLOPE RANDOM DISTRIBUTION PULSE WIDTH MODULATION METHOD

• Main Authors: XU, Jie, NIE, Ziling, XU, Wenkai, SUN, Xingfa, WU, Tinghao, YE, Weiwei, YUAN, Jingxin, HAN, Yi, ZHU, Junjie
• Format: Patent
• Language: English
• Published: 19.08.2021
• 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; BASIC ELECTRONIC CIRCUITRY; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; PULSE TECHNIQUE

A multi-frequency uniformization carrier wave slope random distribution pulse width modulation method, includes: (1) selecting a required random carrier wave sequence and a modulating wave, and after the two are compared, generating a switch device drive signal for pulse width modulation; (2) determining a multiple n of an equivalent carrier frequency f of the random carrier wave sequence, and selecting a main circuit topology; and (3) inputting the switch device drive signal generated in (1) into the main circuit topology of (2) to perform multi-frequency uniformization carrier wave slope random distribution pulse width modulation. The disclosure can improve a frequency domain distribution bandwidth of a harmonic wave without changing the mean and variance of a random carrier wave sequence, and realizes uniform distribution of carrier waves and multiple harmonic peaks near a doubled frequency of the carrier waves in a wider frequency domain.