DC Inverter Control Boards from China
1 resources tagged with "Inverter"
DC inverter control boards — the PCBA inside variable-speed air conditioners and similar appliances — are sourced from China as custom PCBA, where the board drives a compressor motor off rectified mains and demands real high-voltage QC. The risk that separates a good board from a fire hazard is creepage and clearance on the mains side plus the quality of the IPM or IGBT drive stage, so factory qualification has to include hipot (dielectric withstand) testing and a look at solder quality around high-current traces. Speccing the board correctly upfront — voltage range, compressor protocol, protection features — is what keeps the quote and the delivered unit aligned.
When you source an inverter control board, the critical QC is mains-side: dielectric/hipot testing, creepage/clearance against IEC 60335, and verifying the power semiconductors are genuine rather than relabelled — cosmetic inspection alone misses the failures that matter on a high-voltage board.
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FAQ
What QC matters most for a mains-voltage inverter control board?
Dielectric withstand (hipot) testing, creepage and clearance verification per IEC 60335, and confirming the IPM/IGBT power stage uses genuine parts. These are safety-critical and not visible in a basic cosmetic inspection.
How do I spec an inverter control board for a factory quote?
Define input voltage range, compressor type and communication protocol, protection features (over-current, over-temperature), and target ambient rating. Vague specs produce a cheap board that fails to match your unit, and a moving quote.
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