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公开(公告)号：US20180186351A1
公开(公告)日：2018-07-05
申请号：US15580686
申请日：2016-06-28
发明人： Wenguang CHEN , Jing SHANG , Xiong LIU , Chaolu CHEN , Junfeng XU , Huishui PENG , Hua XIAO , Wei LI , Bin ZHANG , Long WANG , Anhui JI
摘要： A braking force distribution method and system for multiple marshalling train compartments are provided. The method includes: determining a current train compartment of multiple target marshalling train compartments, calculating current axel loads of axels of the current train compartment, and distributing braking forces for the axels of the current train compartment in a positive correlation manner based on the current axel loads of the axels. The braking forces of the axels are distributed by using an axel load compensation technology. A braking force generated by an axle with a small axle load is reduced according to a load-decreasing amount of the axle load, while a braking force generated by an axle with a great axle load is increased according to a load-increasing amount of the axle load, so that the braking forces generated by the axles match the axle loads.
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公开(公告)号：US20180302014A1
公开(公告)日：2018-10-18
申请号：US15765251
申请日：2016-07-22
发明人： Jianghua FENG , Junfeng XU , Yuliang WEN , Jing SHANG , Jiade HUANG , Xiaofan ZENG , Zhaoyang ZHANG , Hanfeng ZHENG , Xiong LIU , Yaping HE
CPC分类号： H02P21/32 , H02P6/08 , H02P6/18 , H02P21/18 , H02P2203/03 , H02P2207/05
摘要： A method and a system for correcting an initial zero position deviation are provided, which is applied to a permanent magnet synchronous motor and a resolver. The method includes: driving a rotor of the permanent magnet synchronous motor to rotate at a constant speed; acquiring counter electromotive forces of a stator of the permanent magnet synchronous motor and a position of a rotor of the resolver; calculating a space vector phase angle θ1 based on the counter electromotive forces; acquiring a rotation angle θ2 measured by the resolver; calculating an installation deviation Δθ corresponding to the space vector phase angle θ1 and the rotation angle θ2; and adjusting a position of the resolver until the installation deviation Δθ meets a precision requirement.
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