Contents
How do you manage inrush current?
Inrush current can be reduced by increasing the voltage rise time on the load capacitance and slowing down the rate at which the capacitors charge. Three different solutions to reduce inrush current are shown below: voltage regulators, discrete components, and integrated load switches.
What affects inrush current?
At ambient temperature the NTC device exhibits a high resistance, when the power is turned-on, the high resistance limits the amount of inrush current flowing into the circuit. As the current flows, the thermistor temperature increases thereby reducing the resistance significantly.
When does the inrush current start in a motor?
Inrush current, also referred to as “locked rotor current,” is the excessive current flow experienced within a motor and its conductors during the first few moments following the energizing (switching on) of the motor.
Which is the best way to reduce inrush current?
3 Methods of Reducing Inrush Current Inrush current can be reduced by increasing the voltage rise time on the load capacitance and slowing down the rate at which the capacitors charge. Three different solutions to reduce inrush current are shown below: voltage regulators, discrete components, and integrated load switches.
How are thermistors used to prevent inrush current?
Negative-temperature-coefficient (NTC) thermistors are commonly used in switching power supplies, motor drives and audio equipment to prevent damage caused by inrush current. A thermistor is a thermally-sensitive resistor with a resistance that changes significantly and predictably as a result of temperature changes.
How much Ampacity is needed to resist inrush current?
The increase of fuse or circuit-breaker ampacity, ranging from 225% all the way up to 400% of the circuit rating, made available by Table 430.52, does little to resist the aforementioned inrush current.