四方继保取得适用于调相机启动的电流源型静止变频器控制方法与装置专利

Group 1 - Beijing Sifang Automation Co., Ltd. has obtained a patent for a "current source type static frequency converter control method and device applicable to synchronous machine startup," with authorization announcement number CN115664262B, applied for on October 2022 [1] - The company was established in 1994 and is primarily engaged in the manufacturing of computers, communications, and other electronic devices, with a registered capital of 833.436 million RMB [1] - The company has invested in 22 enterprises, participated in 5000 bidding projects, holds 42 trademark registrations, and has 1762 patents, along with 41 administrative licenses [1] Group 2 - Beijing Sifang Engineering Technology Co., Ltd. was established in 2003 and focuses on the manufacturing of electrical machinery and equipment, with a registered capital of 1050 million RMB [1] - This subsidiary has invested in 5 enterprises, participated in 5000 bidding projects, holds 887 patents, and has 13 administrative licenses [1]