전력 변환 장치 및 그것을 탑재한 전동 파워 스티어링 장치

• Main Author: AOYAGI SHIGEHISA
• Format: Patent
• Language: Korean
• Published: 14.02.2018
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; MOTOR VEHICLES; PERFORMING OPERATIONS; TRAILERS; TRANSPORTING

본 발명의 과제는, 복수의 인버터를 독립 또는 병렬로 모터에 접속하는 전력 변환 장치에 있어서, 고정밀도로 직류 전류를 검출해서 교류 전류를 재현함으로써, 고성능 모터의 구동 제어를 실현하는 것이다. 본 발명은, 제1 전류 검출부 (a)가 제1 인버터의 직류 전류를 검출하는 소정의 전류 검출 기간(T1)은, 적어도 제2 인버터를 구성하는 스위칭 소자의 온/오프 전환 타이밍과 중복되지 않도록 제어되는 것을 특징으로 한다. 보다 바람직하게는, 제1 전류 검출부가 제1 인버터의 직류 전류를 검출하는 소정의 전류 검출 기간(T1)은, 제2 전류 검출부로 전류가 흐르는 기간(T3, T4)과 중복되지 않도록 제어된다. An object of the present invention is to realize high-performance motor driving control by detecting DC currents to reproduce AC currents with high accuracy in an electric power converter in which a plurality of inverters are connected to a motor either independently or in parallel. The present invention is characterized in that a predetermined current detection period in which a first current detection section detects a DC current of a first inverter is controlled in such a manner that the predetermined current detection period does not overlap at least timing of changing over between on-timing and off-timing of a switching element that configures a second inverter. More preferably, the predetermined current detection period in which the first current detection section detects the DC current of the first inverter is controlled in such a manner that the predetermined current detection period does not overlap periods in which a current is carried to the second current detection section.