Technical FAQs 4

What is the role of a precharge resistor?

The role of the precharge resistor is to limit the surge current when the battery is connected to a capacitive load, thus protecting the system from damage. The selection of the precharge resistor is based on calculations involving factors such as the load capacitance, battery voltage, and precharge time. 1.

How to choose a precharge resistor?

The selection of the precharge resistor design considers factors such as cost stability, resistance value, average power, pulse power, and precharge energy. Resistor selection design: Consideration factors include input voltage, the voltage to be precharged, precharge capacitan

What is a PEC precharge resistor?

PEC precharge resistors are built with decades of problem-solving experience and technical knowledge. They provide the reliability and performance necessary for modern high-voltage applications while protecting valuable system components. Required fields are marked *

How much power does a precharge resistor dissipate?

The power dissipated by the precharge resistor during precharge is that energy over the precharge time. For example, with a precharge time of 500 ms: P = V^2 / R = 100 ^2 / 10 = 1000 W! Now, over the long term, the precharge resistor will not need to dissipate any significant power (it will not get hot).

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