5kV高压真空断路器永磁操动机构的研究与设计.pdf

21 12 Vol. 21 No. 12 Dec. 2001 2001 12 Proceedings of the CSEE n 2001 Chin. Soc. for Elec. Eng . :0258-8013 (2001) 12-010 -06 72. 5 kV 1 2 马少华 , 王季梅 ( 1. 沈阳工业大学, 辽宁 沈阳 110023; 2. 西安交通大学, 陕西 西安71004 ) RESEARCH AND DESIGN OF PERMANENT MAGNETIC ACTUATOR FOR 72. 5 kV HV VACUUM CIRCUIT BREAKER 1 2 MA Shao-hua , WANG J-i mei ( 1. Shenyang U niversity of T echnology, Shenyang 110023, China; 2. Xi. an Jiaotong University, Xi. an 71004 , China) ABSTRACT: High voltage vacuum interrupter ( HVVI ) has , longer separat ion and needs faster opening closing speed. Be- cause air gap. s magnetic resistance is proportional to air gap. s : ; length, it is very difficult for the actuator to acquire enough : TM561 : A drive force under longer separation. As a result, HVVI has been hardly equipped by permanent magnetic actuator. Accord- 1 ing to the asymmetry of the reacting force from vacuum inter- rupter and its mechanical transmission system, this paper pre- , 1 8 sents a met hod setting magnetism divider around the operating , , air gap of the opening coil. By w hich, the magnetic flux , 12 kV17. 5 kV 24 kV t hrough the surface of pole is divided into the central flux and t he border flux so as to improve the electromagnetic attraction [ 1, 2] , characterist ics and meet the on off need of 72. 5 kV high voltage , vacuum circuit breaker even under longer