서로 병렬로 접속되고, 또한 기계적으로 결합된 복수 대(臺)의 유도전동기(41)를 운전하는 인버터 등의 전력변환기(10)의 제어장치에 있어서, 전력변환기(10)의 출력 전류를 검출하는 전류 검출 수단(30)과, 그 전류 검출값을 전류 명령값에 일치시키는 전압 명령값을 생성하는 전류 제어 수단(90)과, 전압 명령값의 진폭을 연산하는 전압 명령 진폭 연산 수단(100)과, 샘플링 주기마다 유도전동기(41)의 일차 주파수와 그 때의 전압 명령값의 진폭과의 조합을 기억하는 기억 수단(110)과, 기억 수단(110)의 기억 정보에 근거하여 전압 명령값의 진폭의 증가 분(分)을 일차 주파수의 증가 분으로 나눈 값을 연산하고, 그 나눈 결과가 소정의 기준값을 밑돌 때, 복수 대의 유도전동기(41) 중에 전력변환기(10)에 대해 상순(相順, phase sequence)이 오(誤)배선된 적어도 한 대의 유도전동기(41)가 존재하는 것을 판정하여 고장 신호를 출력하는 구배(勾配) 검출 수단(120)을 구비한다.

    A controlling apparatus for a power converter 10 such as an inverter that operates a plurality of induction motors 41 parallely connected to each other and mechanically coupled to each other includes: current detection means 30 for detecting an output current of the power converter 10; current control means 90 for generating a voltage command value to make the current detection value equal to a current command value; voltage command amplitude calculation means 100 for calculating an amplitude of the voltage command value; storage means 110 for storing, for each sampling period, a combination of a primary frequency of the induction motors 41 and the amplitude of the voltage command value at that time; and gradient detection means 120 for calculating, according to stored information from the storage means 110, a value that is an increase in the amplitude of the voltage command value that is divided by an increase in the primary frequency, and for outputting a failure signal upon determining, when a result of the division is less than a predetermined reference value, that the plurality of induction motors 41 include at least one induction motor 41 whose phase sequence includes incorrect wiring with respect to the power converter 10.


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    Title :

    ELECTRIC VEHICLE AND DEVICE FOR CONTROLLING POWER CONVERTER


    Additional title:

    전력변환기의 제어장치 및 전기차


    Contributors:

    Publication date :

    2016-07-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern



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