Reliable Startup with Large and Unknown Capacitive Loads (Rev. A) Industrial equipment such as a Programmable Logic Controller (PLC) need large capacitors for storing energy to provide backup time for storing critical information before equipment shutdown.
The energy storage capacitor is used to power the DC/DC converter during an event of failure of power on a field power bus. A capacitor of value typically more than 1 mF is used to provide power to PLC CPU during failure.
The PLC CPU needs energy storage to provide a backup for storing critical information in case of loss of power. The energy storage is either provided by a battery or a large capacitor. A large capacitor is preferred over a battery for energy storage due to its lower cost. Figure 1-1 provides a block diagram for the PLC CPU. Figure 1-1.
There exist two primary categories of energy storage capacitors: dielectric capacitors and supercapacitors. Dielectric capacitors encompass film capacitors, ceramic dielectric capacitors, and electrolytic capacitors, whereas supercapacitors can be further categorized into double-layer capacitors, pseudocapacitors, and hybrid capacitors.
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ABSTRACT Industrial equipment such as a Programmable Logic Controller (PLC) need large capacitors for storing energy to provide backup time for storing critical information …
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The PLC CPU needs energy storage to provide a backup for storing critical information in case of loss of power. The energy storage is either provided by a battery or a …
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