根據相關數(shù)據統(tǒng)計，薄膜電容器的應用場景正在不斷擴大，下游應用以輸配電、電機驅動為主，分別占下游應用市場規(guī)模的 31%、23%，其余應用場景還包括電源/適配器/DC-DC 轉換、照明鎮(zhèn)流器、可再生能源 DC-Link 等，而對應的應用終端電力電網建設、照明、家電、新能源發(fā)電、新能源汽車等全球市場均以我國為主要應用市場。
According to the statistics of relevant data, the application scenarios of film capacitors are expanding. The downstream applications are mainly power transmission and distribution and motor drive, accounting for 31% and 23% of the market scale of downstream applications respectively. Other application scenarios also include power supply/adapter/DC-DC conversion, lighting ballast, renewable energy DC Link, etc., while the corresponding application terminals include power grid construction, lighting, household appliances, new energy power generation China is the main application market for new energy vehicles and other global markets.
薄膜電容器有哪些常見的應用場景呢？
What are the common application scenarios of film capacitors?
1.家電
Household appliances
大型家用電器如冰箱、洗衣機、空調都需要驅動大型電機工作，在電機、控制電路和變頻電路種薄膜電容器扮演不一樣角色。
Large household appliances such as refrigerators, washing machines, and air conditioners need to drive large motors to work. Film capacitors play different roles in motors, control circuits, and frequency conversion circuits.
2.照明
Lighting
照明領域中，薄膜電容器主要使用在熒光燈以及高壓汞燈、高壓鈉燈、金屬鹵素燈等高強氣體放電燈產品的鎮(zhèn)流器中。從薄膜電容領導企業(yè)照明業(yè)務相關收入的變化趨勢來看，照明領域整體對薄膜電容的需求處于緩步下降。
In the lighting field, film capacitors are mainly used in the ballasts of fluorescent lamps, high-pressure mercury lamps, high-pressure sodium lamps, metal halide lamps and other high-strength gas discharge lamps. From the perspective of the change trend of the relevant revenue of the lighting business of the film capacitor leading enterprises, the overall demand for film capacitors in the lighting field is slowly declining.
3.新能源車
New energy vehicles
薄膜電容器在新能源汽車領域中的應用主要分為三塊：新能源車逆變器、車載充電器（OBC）以及配套充電樁。
The application of film capacitors in the field of new energy vehicles is mainly divided into three parts: inverter of new energy vehicles, on-board charger (OBC) and supporting charging pile.
1）逆變器
Inverter
逆變器中主要使用薄膜電容和鋁電解電容，其中薄膜電容用于高壓電路部分，起著 EMI和 DC-Link 的功能；MLCC 則大多用于低壓電路部分。
Thin film capacitors and aluminum electrolytic capacitors are mainly used in the inverter, among which thin film capacitors are used in high-voltage circuit, playing the role of EMI and DC Link; MLCC is mostly used in low-voltage circuit.
2）車載充電器（OBC）
On board charger (OBC)
OBC中薄膜電容主要有 EMI 電容、DC-Link 電容&緩沖電容、諧振電容、功率因數(shù)校正等。此外，薄膜電容在 DC-DC 轉換器也有應用。
Film capacitors in OBC mainly include EMI capacitor, DC Link capacitor&buffer capacitor, resonant capacitor, power factor correction, etc. In addition, thin film capacitors are also used in DC-DC converters.
3）充電樁
Charging pile
在直流充電樁中，也需要大容量、高價值的 DC-Link 電容進行緩沖。隨著直流快充充電樁輸出功率的增長，單樁薄膜電容器用量具有提升空間。
In the DC charging pile, large capacity and high-value DC Link capacitors are also required for buffering. With the increase of output power of DC fast charging pile, the amount of single pile film capacitor has room for improvement.
4.光伏風電
Photovoltaic wind power
1）光伏
Photovoltaic
光伏太陽能板吸收光照能量產生直流電壓，而輸電系統(tǒng)使用交流電壓，因此與新能源汽車類似的，需要使用逆變器實現(xiàn) AC/DC 轉換。光伏逆變器中，薄膜電容被用在三個用途：
Photovoltaic solar panels absorb light energy to generate DC voltage, while the transmission system uses AC voltage. Therefore, similar to new energy vehicles, inverters are required to achieve AC/DC conversion. In photovoltaic inverters, thin film capacitors are used for three purposes:
C1、C2：阻止有害的高頻電流，同時減少直流電源線中的電磁干擾，保護太陽能電池板；
C1, C2: prevent harmful high-frequency current, reduce electromagnetic interference in DC power lines, and protect solar panels;
C3：IGBT等開關器件在狀態(tài)切換時容易造成器件的損壞，通常搭配一個聚丙烯薄膜電容進行緩沖；
C3: IGBT and other switching devices are prone to damage during state switching, and are usually buffered with a polypropylene film capacitor;
C4：逆變器輸出中為交流電搭配的濾波電容器，通常也為金屬化薄膜聚丙烯電容器。
C4: The filter capacitor matched with AC in the inverter output is usually metallized film polypropylene capacitor.
2）風電
Wind power
風電發(fā)電系統(tǒng)中薄膜電容器主要被用于變流器電氣系統(tǒng)中的幾個部分，其功能和在光伏發(fā)電逆變器十分相似：
Thin film capacitors in wind power generation systems are mainly used in several parts of the converter electrical system, and their functions are very similar to those in photovoltaic power generation inverters:
C1（緩沖電容器）：IGBT 等開關器件在狀態(tài)切換時容易造成器件的損壞，通常搭配一個聚丙烯薄膜電容進行緩沖；
C1 (buffer capacitor): switching devices such as IGBT are prone to damage during state switching, and are usually buffered with a polypropylene film capacitor;
C2（直流鏈路濾波電容器）：直流鏈路電容有助于保護逆變器免受瞬時電壓尖峰、浪涌和 EMI 的影響；
C2 (DC link filter capacitor): DC link capacitor helps protect the inverter from transient voltage spikes, surges and EMI;
C3（輸出濾波電容器）：變流器輸出中為交流電搭配的濾波電容器，通常也為金屬化薄膜聚丙烯電容器。
C3 (output filter capacitor): the filter capacitor matched with AC in the converter output, usually also a metallized film polypropylene capacitor.
薄膜電容行業(yè)正在從過去家電、照明為主的需求驅動，向新能源車、光伏風電需求驅動轉換，行業(yè)高增長疊加龍頭公司擴產和份額提升，薄膜電容行業(yè)前景可期。
The film capacitor industry is changing from the past demand driven by household appliances and lighting to the demand driven by new energy vehicles and photovoltaic wind power. The high growth of the industry superimposes on the expansion and share increase of leading companies. The film capacitor industry has a promising prospect.
