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High Voltage Capacitor Charger with Latest Innovations
Much like a small rechargeable battery, the capacitor is a component that has the ability or 'capacity' to store energy in the form of an electrical charge producing a potential difference. Though there are many different kinds of capacitors available, they all do the same thing of storing a charge. That is from very small capacitor beads used in resonance circuits to large power factor correction capacitors.
When designing with switching regulators, application requirements determine how much input and output capacitance is needed. With this, there are a number of key concerns which affect your selection. The design of the capacitor plays a big part in determining the amount of capacitance required with the requirements of electrical performance.
On the other hand, the transient requirements of your system also play an important role. A few things like load transient, voltage requirements, and capacitor, all these factors affect capacitor selection, that is, whether you will need a high power resonant inverter or a low power one that can also drive a traditional pulse forming network. Other important issues to consider include your budget, requirements, and the capacitor cost.
Variables affecting the Working Mechanism of Capacitor Charger
- Input Voltage: Note that, the greater the input voltage, the more the capacitor will charge up to. Capacitor chargers only charge the current and voltage that they are exposed to. It will charge to a greater value if the capacitor is exposed to a larger voltage. It will charge to a smaller voltage value if it is charged by a smaller voltage. All in all, the input voltage has a direct relationship with the voltage current.
- Time of charging up: During the charging process, time is very important. This means that the more the capacitor has to charge, the more time that elapses. The shorter the time it takes, the shorter period of time the capacitor has to charge. The capacitor will emit a greater current with a greater value of time and charge voltage. The smaller the time it takes, the smaller the voltage current.
- Resistance to deliver clean and efficient energy: The changing resistance will determine how fast or slow the capacitor will charge. There is a change here in case of resistance, if the resistance is greater, the charging process will be slower. As resistance tends to play a major role in slowing down the current. On the other hand, the capacitor can charge quicker if the resistance is less or lower. Thus more the resistance, the smaller the current, and the smaller the resistance, the greater the current.
- Capacitance: The capacitance of the charger will ensure reliable operation in harsh environments and operating systems and it also determines how long it will take for the capacitor to charge. For instance, when the capacitance is large, it will take longer to charge because there is more ability or room for the capacitor to store charge. On the contrary, the smaller the capacitance, the quicker it takes for the capacitor to fill because there is less room for storing charge.
Each design has specific requirements which must be addressed when selecting input and output capacitance. Most often, when the system requirements are not underlined beforehand it can lead to setting hard limits for a design. What's more, depending on what you are trying to accomplish, the amount and type of capacitance can vary.
Performance in Different Situations
There is virtually no power or no power is delivered when the power supply is turned on because the initial voltage across the capacitor is zero or very low. The delivered power is also very low as the output current is limited by the rating of the output component. More power maybe delivered in cases where the output current is linearly constant. Just before the end of the charging cycle, maximum power needs to be delivered and this power is twice the average power.
Over a complete charging cycle, if the charger is rated at 1,000 joules per second, the initial power will be zero watts, and the final power will be 2,000 watts with the average power being 1,000 watts. So if the capacitor energy is large, the input power may double, which can result in causing blown fuses or power limitations.
Among the many electrical parameters, a few of the important factors are as follows:
- Measured in Joules/sec, the output power is important as it determines how quickly the capacitor will be charged to the required operating voltage.
- The higher the repetition rate, the higher the average rate or the power the capacitor charging delivers. It indicates how many times per minute or per second the capacitor will be charged.
- Output voltage indicates the voltage to which the load capacitor will be charged.
- Depending on the device class and required certification for most medical applications the leakage current should be less than 0.5 mA. The input leakage current indicates the leakage current to the earth.