flux-change-voltage-limit-three-row-scan - Electronic Circuits XV: Transformers and Coupled Inductors Step by Step

Flux change rate can pass, touch, or exceed a winding voltage limit. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

Flux-change row 1

Turn counts and interval stay fixed. Flux change 1 Wb in 1 s gives primary voltage 4 V against an 8 V ceiling, so margin is 4 V.

m=4\ \text{V}\quad\text{pass}

Flux-change row 2

Turn counts and interval stay fixed. Flux change 2 Wb in 1 s gives primary voltage 8 V against an 8 V ceiling, so margin is 0 V.

m=0\ \text{V}\quad\text{pass}

Flux-change row 3

Turn counts and interval stay fixed. Flux change 3 Wb in 1 s gives primary voltage 12 V against an 8 V ceiling, so margin is negative 4 V.

m=-4\ \text{V}\quad\text{fail}