With the intensification of automobile electrification, the voltage and output power of automotive circuit system have been greatly improved, and the key components have more stringent requirements on the withstand voltage and impact resistance of electronic components. The change of working conditions puts forward new requirements for the performance of capacitor components in electronic system, which drives the demand of film capacitor in automobile industry.
上海15选5玩法 薄膜电容器是电动汽车驱动电路中的主要元件，主要起平滑的作用。逆变器将电池的直流电通过转换器转换成变动较小的电压，再通过IGBT 开关元件转换成近似于交流电的矩形波，由此产生的浪涌电压很大，需要采用平滑电容器消除。
Thin film capacitor is the main component of electric vehicle drive circuit, which plays a smoothing role. The inverter converts the DC power of the battery into a relatively small voltage through a converter, and then converts it into a rectangular wave similar to alternating current through IGBT switching elements. The surge voltage generated by this is very large and needs to be eliminated by using a smooth capacitor.
上海15选5玩法 在新能源汽车电机驱动和控制电路中，需要的主要电子元器件是功率半导体器件IGBT 、控制IC 以及电容器，其中，IGBT 占大约2/3 的成本。
In the motor drive and control circuit of new energy vehicles, the main electronic components are power semiconductor device IGBT, control IC and capacitor, of which IGBT accounts for about 2 / 3 of the cost.
上海15选5玩法 The core of motor control technology is the inverter technology which needs high-efficiency motor control. The inverter technology of high-efficiency motor control needs a powerful IGBT module and a matching DC support capacitor.
早期的平滑电容器曾采用铝电解电容，但为了提高效率，电机驱动的最大电压从500V 提高到了650V 后，铝电解电容的耐压不足，薄膜电容器成为主流。
Aluminum electrolytic capacitor was used in the early smooth capacitor, but in order to improve the efficiency, the maximum voltage driven by motor was increased from 500V to 650V, and the withstand voltage of aluminum electrolytic capacitor was insufficient, and thin film capacitor became the mainstream.
上海15选5玩法 New energy vehicles replace the original aluminum electrolytic capacitors with thin film capacitors.
On the one hand, the film capacitor is very suitable for use in the electrical environment of new energy vehicles because of its voltage and impact resistance.
On the other hand, in the past years of development, the system and weight of thin-film capacitors have been reduced by 3-4 times. At the same time, the segmentation technology of metallization has been improved, which greatly helps the development of thin-film capacitors.
上海15选5玩法 In the field of new energy vehicles, the existing aluminum electrolytic capacitors will be partially replaced by thin film capacitors in the future. At present, more and more companies have replaced electrolytic capacitors with thin film capacitors. At the same time, in DC / DC, motor control system, battery management system and other high-voltage electrical units, the use of thin-film capacitors will also increase with the promotion and popularization of new energy vehicles.