Harmonic Current Control

With a switching power supply or other capacitor input type rectifier circuits, or a device containing a phase control circuit, the input current does not make a sine wave. The waveform is deformed, resulting in the generation of a harmonic current. A harmonic current deformation seldom causes problems within a single device. When, however, many devices are used simultaneously, the harmonic current becomes too great to neglect, and results in damage to electric power generation/distribution facilities or malfunctions of adjacent equipment. There are various standards which control harmonic currents around the world.

Heat Radiation (thermal radiation)

Heat radiation means that the thermal energy of a heated object is discharged in the form of an electromagnetic wave (infrared beam).

Hysteresis

For a reflective type photoelectric sensor, the difference between the reset distance and the detecting distance using a standard target. Hysteresis of photoelectric sensor is represented as a ratio to the detecting distance (X% of detecting distance). The reset distance refers to the distance from the light-receiving surface of a sensor head to the point at which sensor resets for subsequent detection.