Reactions of bistable B-H loops on magnetic amplifiers

Magnetic amplifiers commonly use 50% nickel-iron core materials with oriented crystals. These materials are commercially named Delta-max, Hypernic V, Orthonik, Orthonol, Permenorm, Permeron, etc. They are used successfully in many applications, but frequently when they are used under-excited in magnetic amplifiers (where the power supply voltage is insufficient to drive the core from negative to positive saturation), instability and slow response time occur.