High-frequency chain-type micro inverter, and signal modulation method and apparatus therefor

A signal modulation method for a high-frequency-link micro inverter, applied to the high-frequency-link micro inverter and comprising:

• forming an intermediate signal according to a carrier signal and a modulation signal;
• obtaining a reference signal according to the carrier signal;
• and
• forming a drive signal according to the carrier signal, the reference signal, and the intermediate signal, wherein the drive signal is used for driving a primary-side full-bridge circuit and a secondary-side conversion circuit to cause the high-frequency-link micro inverter to output at least a two-phase alternating-current voltage.

A signal modulation apparatus for a high-frequency-link micro inverter, connected to the high-frequency-link micro inverter and comprising:

• at least one processor;
• and a memory communicatively connected to the at least one processor;
• wherein the memory stores instructions are configured to, when executed by the at least one processor, cause the at least one processor to perform steps in the following modules:
• an intermediate signal determination module, configured to form an intermediate signal according to a carrier signal and a modulation signal;
• a reference signal determination module, configured to obtain a reference signal according to the carrier signal;
• and
• a drive signal generation module, configured to generate a drive signal according to the carrier signal, the reference signal, and the intermediate signal, wherein the drive signal is used for driving a primary-side full-bridge circuit and a secondary-side conversion circuit to cause the high-frequency-link micro inverter to output at least a two-phase alternating-current voltage.