Contents
How do you find the inductive load?
The formula for calculating the inductive reactance of a coil is: inductive reactance, or XL, is the product of 2 times p (pi), or 6.28, the frequency of the ac current, in hertz, and the inductance of the coil, in henries. XL =2p x f x L. L = the inductance value of the coil in henries.
What is an inductive dc load?
An inductive load is any device which has a coil of wire which, when energized, generally performs some kind of mechanical work. The magnetic field caused by the current flow can move the switching contacts in a relay or contactor, operate solenoid valves, or rotate a shaft in a motor. Current.
Can an inductive load damage a DC power supply?
If you’re using a DC power supply to power DC motors, solenoids, fans, relays and other inductive loads, you need some kind of circuit protection. Without this protection, your power supply can be damaged by high voltage spikes from these devices. Figure 1 shows an inductive load connected to a DC power supply.
What happens when you turn off an inductive load?
When you turn off the power, the current quickly drops to zero and no damage is done. Inductive loads are another matter. If you’re using a DC power supply to power DC motors, solenoids, fans, relays and other inductive loads, you need some kind of circuit protection.
What should be the voltage of an inductive load?
Ensure that the chosen components are suitably rated for the inductance and energy to be dissipated. The peak reverse voltage ratings should be a minimum of two times the power supply maximum output voltage. The continuous forward current ratings should be a minimum of 1.5 times the power supply maximum output current.
What is the fly back voltage of an inductive load?
Even if you were powering the inductive load with only 12 V or 24 V, the fly-back voltage could be several hundred to several thousand volts. This voltage is equal to L, the inductance of the load times di/dt, which is the rate of change of current with respect to time. The more quickly the current changes, the higher the voltage.