Power:Transformer Inrush Current: Difference between revisions
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= Transformer Inrush Current = | = Transformer Inrush Current = | ||
When a transformer works normally, the flux produced in the core is orthogonal to the applied voltage. When the voltage is zero, the flux waveform is at its negative peak. When a transformer is switched on from the primary by keeping the secondary open circulated, it acts as a simple induc- tance and the flux will start from zero as shown in Figure | When a transformer works normally, the flux produced in the core is orthogonal to the applied voltage. When the voltage is zero, the flux waveform is at its negative peak. When a transformer is switched on from the primary by keeping the secondary open circulated, it acts as a simple induc- tance and the flux will start from zero as shown in Figure 1. | ||
[[File:Transformer_Voltage_and_Flux.png|550px|thumb|center|Figure 1 Transformer Voltage and Flux]] | |||
If the switching on is at the instant of voltage zero, the flux is initiated from the same origin of the voltage. The flux is the integral of the voltage, and the value of flux at time π can be written as | If the switching on is at the instant of voltage zero, the flux is initiated from the same origin of the voltage. The flux is the integral of the voltage, and the value of flux at time π can be written as | ||
Revision as of 13:16, 20 September 2023
Transformer Inrush Current
When a transformer works normally, the flux produced in the core is orthogonal to the applied voltage. When the voltage is zero, the flux waveform is at its negative peak. When a transformer is switched on from the primary by keeping the secondary open circulated, it acts as a simple induc- tance and the flux will start from zero as shown in Figure 1.
If the switching on is at the instant of voltage zero, the flux is initiated from the same origin of the voltage. The flux is the integral of the voltage, and the value of flux at time π can be written as
