What is a hysteresis current control?
Hysteresis control allows the inductor current to vary between two extreme points however this variation in current results in low-frequency ripple current which can only be taken care of by a quality filter circuit.
What is hysteresis PWM?
Abstract: Hysteresis current-controlled pulsewidth modulation (PWM) is very robust but it possesses nonconstant switching frequency, and it is difficult to use for high-performance position servo applications. Then, the current command is adjusted by a robust compensation signal.
What is hysteresis band control?
The Hysteresis Band is controlled as variations of the rectifier input voltage and output dc link voltage to achieve constant switching frequency at any operating conditions, i.e., at rated and below and above the rated conditions.
What is the effect of hysteresis?
Effects. Hysteresis Effect. The magnetization of ferromagnetic substances due to a varying magnetic field lags behind the field. This effect is called hysteresis, and the term is used to describe any system in whose response depends not only on its current state, but also upon its past history.
How can hysteresis error be reduced?
To reduce the effects of hysteresis, it is common practice to exercise your equipment before use or calibration. This means that you should load and unload your equipment several times before you use it.
Why is hysteresis used?
Hysteresis in analog circuits is useful for controlling switching in circuits with saturation (i.e., transistors), although it is undesirable in some circuits. As an example, hysteresis can be purposefully added to a comparator circuit as it can be used to set the duty cycle of the output waveform.
Where is hysteresis used?
It is mostly used to retain a memory, for example, hard disks, magnetic tape, and credit cards. Hysteresis is applied in many artificial systems such as in thermostats and Schmitt triggers which are designed to prevent unwanted frequent or unwanted rapid switching.