POWER TRANSFORMING APPARATUS AND AIR CONDITIONER INCLUDING THE SAME

Disclosed in the present invention are a power transforming apparatus capable of reducing stress on a converter switch during PFC operation, a method of operating the same, and an air conditioner including the same. To this end, the power transforming apparatus according to the present invention can...

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Bibliographische Detailangaben
Hauptverfasser:	GONG PHILLSIK, OH JEONGEON, YANG SONGHEE, KIM SANGHYEON
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING 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 BLASTING CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROL OR REGULATION THEREOF CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION HEATING LIGHTING MECHANICAL ENGINEERING RANGES VENTILATING WEAPONS
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Beschreibung
Zusammenfassung:	Disclosed in the present invention are a power transforming apparatus capable of reducing stress on a converter switch during PFC operation, a method of operating the same, and an air conditioner including the same. To this end, the power transforming apparatus according to the present invention can determine the number of converters to perform PFC operation based on the size of input power and the speed of a motor. Additionally, to prevent stress from being added to switch elements of any one converter, a target converter channel is randomly selected using a random function at the beginning of the PFC operation. In addition, in order to distribute stress to all switches, the phases are individually controlled so that converters matching the number of converters to perform PFC operation are switched at a preset period, for example, each time a zero-crossing is detected. 본 발명은 PFC 동작시 컨버터 스위치의 스트레스를 저감시킬 수 있는 전력변환장치, 이의 동작방법, 및 이를 포함하는 공기 조화기를 개시한다. 이를 위해, 본 발명에 따른 전력변환장치는 입력전력의 크기와 모터의 속도에 근거하여 PFC 동작을 수행할 컨버터의 개수를 결정할 수 있다. 또한, 어느 하나의 컨버터의 스위치 소자에 스트레스가 가중되지 않도록, PFC 동작의 초기시 랜덤 함수를 사용하여 타겟 컨버터 채널을 임의 선택한다. 또한, 모든 스위치에의 스트레스 분산을 위해, PFC 동작을 수행할 컨버터의 개수에 매칭되는 컨버터를 기설정된 주기, 예를 들어 제로-크로싱 검출시마다 변경하면서 스위칭하도록 상(phase)을 개별 제어한다.