Four Common Waveform Images and Characteristics of Multipolar Magnetic Rings

Four Common Waveform Patterns and Characteristics of Multipole Magnetic Rings

In magnetic property testing of multipole magnetic rings, magnetic circuit test waveforms serve as core indicators for evaluating magnetization quality, magnetic field distribution uniformity, and application compatibility. Currently, four common and representative magnetic circuit test waveforms exist: sine wave, trapezoidal wave, square wave, and saddle wave. Below are descriptions of their characteristics and waveform diagrams.

First: Sine Wave Waveform

Characteristics: Exhibits continuous, smooth periodic variation. Magnetic flux density transitions naturally from positive to negative peaks without distinct inflection points or abrupt changes. Magnetic field distribution between adjacent poles is uniform with excellent symmetry.

Second: Trapezoidal Waveform

Characteristics: The trapezoidal waveform exhibits a relatively flat peak region with steep rising and falling edges. Magnetic flux density maintains a stable high value in the pole center area.

Third: Saddle Waveform

Characteristics: The saddle wave exhibits slight concavity or a double-peak phenomenon at the positive and negative peaks, resembling a “saddle” in overall shape.

Magnetic flux density is slightly lower at the pole center and higher on both sides.

Fourth: Square Wave Waveform

Characteristics: Magnetic flux density exhibits an approximate “switching” pattern between adjacent poles. The transition from positive to negative peaks is extremely rapid, with steep, abrupt rising and falling edges and virtually no transition zone. At the pole center, magnetic flux density approaches a constant value and rapidly reaches saturation. Pole boundaries are sharply defined with clear polarity demarcation.