The prototype test results indicate : voltage mode and current mode ac - ac mode ac / ac converters with high frequency link have the advantages such as high frequency electrical isolation . simple topology , two - stage power conversions , high power density , bidirectional power flow , good line current waveform , no audio noise , high converting efficiency , and high input power factor etc . this kind of converter lay the key technical foundation on new type regulated sinusoidal ac power supply , electronic transformer , ac regulator , and wave converter etc 试验表明，这类变换器具有高频电气隔离、电路拓扑简洁、两级功率变换( lfac hfac lfac ) 、功率密度高、双向功率流、无音频噪音、变换效率高、网侧功率因数高等优点。为新一代正弦交流稳压器、电子变压器、交流调压器、同频波形变换器的实现奠定了关键技术基础。
This pck avoiding miscellanecous circuit design , reducing parts and accessd ries , lowering volume and weight largely , and strengthening operating availability : provided mith high capacity to reduce quantity of batteries andjkeep same dischange time , without replacing battery frequently ; supplying nith stable putput power fit to origins of long time unstable voltage and avoiding supplying power by kattery under not power fqilure ; this unit can be located beside computer becamse of its beautiful appearance 本系列不间断电源是本公司最新推出的新一代方波后备式不间断电源，专为个人电脑设计，集交流稳压器高速后备电源及尖峰浪涌收为一体，具有体积小、功能全、效率高、性能可靠、使用方便等特点，并具有周全的自动保护功能。
Ningbo tulip electron co . , ltd . is a professional electronic company , specialized in producing energy - saving lamps , electronic ballasts , electronic testing instruments , dc regulated power suppliers and ac automatic voltage regulators . as one of the leading electronic manufacturer in china , " tulip " owns advanced facilities including one panasonic smt machine , two pcb board inserting lines , one set dual wave sodering line and one pvc belt converyor 宁波得力浦电子有限公司宁波得力浦电子有限公司是一家生产各类电子节能灯电子镇流器电子测量仪器仪表等直流压电源，交流稳压器等其他电子产品的专业公司。具备国内先进的生产设备，流水线及检测。
