| 摘要 |
A refrigeration power supply system 10 comprises a power source such as an engine 30 connected to a primary alternator 40 and a secondary alternator 50, preferably via a drive belt 20. The secondary alternator is connected to a refrigeration system, for example, a compressor 60 of the refrigeration system, and is configured to operate in parallel to the primary alternator. The output voltage of the secondary alternator may be substantially fixed at 48 volts DC through use of a power module 55 irrespective of the output of the engine thus ensuring good performance of the refrigeration system even at low engine speeds such as tick-over. A sensor and a controller may be used to monitor operation of the engine and control an operating frequency of a motor of the refrigeration system based upon the monitored parameter. The primary alternator preferably provides a lower output voltage than the secondary alternator. A vehicle, such as a refrigerated home delivery vehicle, is also claimed. |
