About: Pre-charge

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Pre-charge of the powerline voltages in a high voltage DC application is a preliminary mode which limits the inrush current during the power up procedure. A high-voltage system with a large capacitive load can be exposed to high electric current during initial turn-on. This current, if not limited, can cause considerable stress or damage to the system components. In some applications, the occasion to activate the system is a rare occurrence, such as in commercial utility power distribution. In other systems such as vehicle applications, pre-charge will occur with each use of the system, multiple times per day. Precharging is implemented to increase the lifespan of electronic components and increase reliability of the high voltage system.

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  • Pre-charge of the powerline voltages in a high voltage DC application is a preliminary mode which limits the inrush current during the power up procedure. A high-voltage system with a large capacitive load can be exposed to high electric current during initial turn-on. This current, if not limited, can cause considerable stress or damage to the system components. In some applications, the occasion to activate the system is a rare occurrence, such as in commercial utility power distribution. In other systems such as vehicle applications, pre-charge will occur with each use of the system, multiple times per day. Precharging is implemented to increase the lifespan of electronic components and increase reliability of the high voltage system. (en)
  • 電源的緩啟動也稱為預充電（Pre-charge），常用在直流電入電的設備中，或是輸入交流電，經整流後再配合電解電容器濾波的設備。是在電源投入後，設備先維持在可以限制的模式，在充電完成之後，再切換到一般的動作模式。 針對有大容量電容器的高電壓電氣設備，若電容器電壓很低，在電源投入瞬間會產生大電流。此電流會對系統元件產生很大的電應力，甚至會使零件受損。在一些應用中，很少會需要啟動此一機制（例如商業用電的配電）。不過在車輛的應用中，每一次發動車輛都會用到緩啟動的機制，可能一天會用到數次。緩啟動機制的目的是延長電子元件的壽命，提昇高電壓系統的可靠度。 (zh)
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  • Pre-charge of the powerline voltages in a high voltage DC application is a preliminary mode which limits the inrush current during the power up procedure. A high-voltage system with a large capacitive load can be exposed to high electric current during initial turn-on. This current, if not limited, can cause considerable stress or damage to the system components. In some applications, the occasion to activate the system is a rare occurrence, such as in commercial utility power distribution. In other systems such as vehicle applications, pre-charge will occur with each use of the system, multiple times per day. Precharging is implemented to increase the lifespan of electronic components and increase reliability of the high voltage system. (en)
  • 電源的緩啟動也稱為預充電（Pre-charge），常用在直流電入電的設備中，或是輸入交流電，經整流後再配合電解電容器濾波的設備。是在電源投入後，設備先維持在可以限制的模式，在充電完成之後，再切換到一般的動作模式。 針對有大容量電容器的高電壓電氣設備，若電容器電壓很低，在電源投入瞬間會產生大電流。此電流會對系統元件產生很大的電應力，甚至會使零件受損。在一些應用中，很少會需要啟動此一機制（例如商業用電的配電）。不過在車輛的應用中，每一次發動車輛都會用到緩啟動的機制，可能一天會用到數次。緩啟動機制的目的是延長電子元件的壽命，提昇高電壓系統的可靠度。 (zh)
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  • Pre-charge (en)
  • 緩啟動 (zh)
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