A property of a system such that an output value is not a strict function of the corresponding input, but also incorporates some lag, delay, or history dependence, and in particular when the response for a decrease in the input variable is different from the response for an increase. For example, a thermostat with a nominal setpoint of 75° might switch the controlled heat source on when the temperature drops below 74°, and off when it rises above 76°.

a closed curve generated by cycling the input to a system undergoing hysteresis through an appropriate range

A type of synchronous motor in which the rotor consists of a central nonmagnetic core around which are rings of material with a high degree of magnetic hysteresis; it generates near constant torque at varying speeds, even when starting.

plural of hysteresis loop

plural of hysteresis motor