| 摘要 |
<p>Systems and methods for producing standby uninterruptible power for an AC load rectify an AC utility input voltage to produce a rectified voltage and activate a DC battery voltage in response to a change in the AC utility input voltage to thereby produce a standby DC voltage. The rectified voltage and the standby DC voltage are connected to an AC load that includes input rectification to thereby produce standby uninterruptible power without the need for costly, bulky, and/or unreliable inverters or converters. Seamless transfer of power may be provided to support the AC load upon failure of the AC utility input voltage and upon restoration of the AC utility input voltage. The AC utility input voltage is preferably rectified by a diode rectifier, most preferably a full-wave diode rectifier including at least four diodes, to produce the rectified voltage. A diode switch is used to activate the DC voltage from the battery in response to a change in the AC utility input voltage to thereby produce the standby DC voltage. The diode switch may include a separate diode and an electronic or electromechanical switch. Alternatively, the diode switch may be a single element such as a thyristor. The diode rectifier and the diode and switch are connected in a diode-OR connection that provides the standby uninterruptible power for the output of the UPS. The diode-OR connection allows the strongest source to support the AC load at all times.</p> |
