| 摘要 |
<p>This invention relates to the field of emergency power sources which are automatically activated when ordinary utility power supplies fail, as during blackouts. More particularly, the invention relates to the field of emergency power supplies of the type containing a storage battery which is charged during normal situations and discharged as an emergency supply during power outages. The present invention is of the type that is designed to supply an AC load (43) under emergency conditions. Hence, an inverter is required to convert the DC stored in the battery (50) to AC. The emergency power supply (25) features a fixed phase shift (o) between the input (Es) and battery charging waveforms (Ei) and intermittent inverter operation under normal (i.e., non-emergency) conditions. </p> |
