Nickel-hydrogen battery state of charge during low rate trickle charging (SuDoc NAS 1.26:201115) From DC Mains
The circuit for charging from D.C. mains includes a resistance connected in series, to reduce the current flow from the higher mains voltage A simple charging circuit is shown in Fig. 1.4. Feedback from the battery on charge is prevented, at mains failure, by the relay (is de-energized) and spring, arranged to automatically disconnect the battery. The contacts are spring operated; gravity opening is not acceptable for marine installations.
Charging from AC Mains
Mains ac. voltage is reduced by transformer to a suitable figure and then rectified to give a direct current for charging. The supply current may be taken from the 230 volt section and changed to say 30 volts for charging 24 volt battery Various transformer/rectifier circuits are described in Chapter 2 and any of these could be used (i.e. a single diode and half-wave rectification, two or four diodes or full-wave rectification, or a three-phase six diode circuit). Smoothing is not essential battery incorporated for power supplies to low-pressure D.C. systems with standby batteries for systems with batteries on float.
No comments:
Post a Comment