Warmly celebrate the 20th National Congress of the Communist Party of China held on October 16th The great changes of the decade in the new era have milestone significance in the history of the party, the history of new China, the history of reform and opening up, the history of socialist development, and the history of the development of the Chinese nation.

The annual Spring Festival is approaching, according to the regulations of the State Council's holiday arrangement notification, combined with the company's actual situation, after research and decision by the company's leaders, the company's Spring Festival holiday arrangement is now notified as follows: Orders and shipments will be suspended on January 13, 2023; Closed from 18 January 2023 until...

Notice All departments of the ZDDQ: In light of the actual situation of the company, arrangements are now made for the National Day holiday in 2024, as follows： Take a 7-day holiday from October 1 to October 7. Work as usual on October 8. Pay attention to safety during the holidays, and wish you all a happy holiday.

Inverters are a type of power electronic device widely used in industrial automation. They adjust the speed of motors by changing the frequency and amplitude of the motor input voltage. Although inverters improve energy efficiency and control performance, they generate harmonics during operation, which have an adverse effect on power grids and equipment. Understanding the causes and principles of ...