Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
CURRENT-LIMITING PROTECTION METHOD AND APPARATUS FOR UPS PRECEDING-STAGE BOOST CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/140902
Kind Code:
A1
Abstract:
Disclosed are a current-limiting protection method and apparatus for a UPS preceding-stage boost circuit. The current-limiting protection method comprises: sampling a current of an inductor in an upper arm and a lower arm of a dual-Boost circuit in a UPS preceding-stage boost circuit (s1); when the UPS preceding-stage boost circuit boosts a positive bus, attenuating a current sampling signal of the lower arm, such that same does not exceed a pre-set current-limiting threshold value, and when the UPS preceding-stage boost circuit boosts a negative bus, attenuating a current sampling signal of the upper arm, such that same does not exceed the pre-set current-limiting threshold value (s2); and comparing the attenuated current sampling signals of the upper arm and the lower arm with the pre-set current-limiting threshold value, and generating corresponding upper arm and lower arm drive signals according to a comparison result, so as to drive the turning-on and turning-off of a boost switch tube in the upper arm or a boost switch tube in the lower arm (s3). The current-limiting protection method and apparatus can ensure that the situation where an inductor current simultaneously charges a positive bus capacitor and a negative bus capacitor in a battery state is prevented, thereby preventing the situation where a single-side bus is loaded.

Inventors:
XU, Min (Beidou Industrial Zone, Jinfeng Industrial DistrictZhangzhou, Fujian 0, 363000, CN)
WANG, Dingfu (Beidou Industrial Zone, Jinfeng Industrial DistrictZhangzhou, Fujian 0, 363000, CN)
SHI, Xuelei (Beidou Industrial Zone, Jinfeng Industrial DistrictZhangzhou, Fujian 0, 363000, CN)
ZHONG, Weilong (Beidou Industrial Zone, Jinfeng Industrial DistrictZhangzhou, Fujian 0, 363000, CN)
HUANG, Shaohui (Beidou Industrial Zone, Jinfeng Industrial DistrictZhangzhou, Fujian 0, 363000, CN)
Application Number:
CN2018/101511
Publication Date:
July 25, 2019
Filing Date:
August 21, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
ZHANGZHOU KEHUA TECHNOLOGY CO., LTD. (Beidou Industrial Zone, Jinfeng Industrial DistrictZhangzhou, Fujian 0, 363000, CN)
KEHUA HENGSHENG CO., LTD. (No. 457, Malong Road Torch High-Tech Industrial Zon, Xiamen Fujian 6, 361006, CN)
International Classes:
H02M1/32; H02J9/06
Foreign References:
CN108111006A2018-06-01
CN203104386U2013-07-31
CN107040137A2017-08-11
CN103280960A2013-09-04
EP1014550A22000-06-28
Attorney, Agent or Firm:
SHIJIAZHUANG GOWELL INTELLECTUAL PROPERTY LAW FIRM (9 Floor, No. 45 Shennong Building Tangu South Stree, Shijiazhuang Hebei 1, 050031, CN)
Download PDF: