ABSTRACT
For unattended machines thet supply a local load the selfregulating generatoris an obvious choise. In principle, it derives its excitation from the armature voltage and current of the generator via a compounding circuit. An important benifit of this arrangement is that excitation is sustained when the generator is subjected to ashort circuit. It is usual for a compound sysyem to include an automatic voltage regulator in order to achieve closer voltage control and assist rapid voltage correction following sudden load chnages. In the case of mini-and microinstallations, the excitation and regulation equipment can with advantage form a generator-mounted package. A brushless generator may also be preferred so that maintenance requirements are minimised (Figure 2.9).
