MAT 6V/15V/25V/36V/ 022300
2-7
FIGURE 2-4. VARIATION OF OUTPUT IMPEDANCE WITH FREQUENCY FOR A VOLTAGE SOURCE AND A
CURRENT SOURCE
A practical model for a voltage stabilized Power Module includes a series inductance represent-
ing dc and low frequency source impedance. Load leads should have minimum voltage drops
(error sensing is discussed below) and minimum inductance (error sensing does not compen-
sate for this). Similarly a model for a current stabilized Power Module includes a parallel capaci-
tor representing the dc and low frequency source impedance.
These considerations are important if:
1) The load is constantly changing value
2) The load is switched "on" and "off"
3) The output of the Power Module is step programmed
4) The load is reactive
5) Dynamic output response of the Power Module is of concern
