What does a power factor choke do?
A power factor indicates how far the electrical equipment causes the electric current delivered at the site to be out of phase with the voltage. The ‘PF Choke’ is used to reduce this ‘Out of Phase’ or , in other words ‘Choke’ the Power Factor coming into ECM Module preventing the burn out of its electronics.
What is a power choke?
A power choke is connected between the mains supply and the inverter. It smoothes current peaks caused by the current consumption of the inverter. Lower current peaks also cause a longer service life of the electrolytic capacitors in the intermediate circuit, because the starting current is clearly limited. …
Why do we require output choke in Drive?
Output choke help to reduce this peak voltage, and increase the rise time, to reduce the stress applied to the motor insulation and prevent damages. Output choke may be used to protect variable frequency drives and motors.
What are common mode chokes used for?
Common mode choke coils are used to suppress common mode noise. This type of coil is produced by winding the signal or supply wires one ferrite core. Since magnetic flux flows inside the ferrite core, common mode choke coils work as an inductor against common mode current.
Does a choke coil have high inductance?
A choke will has got high inductance and low resistance. Since an inductor is a nonresistive device, it does not consume any power in the form of heat like a resistance. That’s why we use a low resistance and a high inductance in a choke to save power.
What is input choke?
Input Chokes are designed to effectively reduce the input harmonic distortion caused to the incoming supply by non-linear loads. … Input chokes have the additional benefit of protecting the input of the drive from line surges, spikes and notches or where a line imbalance might exist (3 phase drives).
What is the resistance of choke?
For a typical choke input supply, you need a choke with no more than 100-200 ohms or so DCR. A capacitor input supply typically might use a choke with a 250 ohm – 1K DCR. The higher the resistance, the more voltage drop and the poorer the regulation, but the cost will be lower.