Power supply apparatus

摘要

The power supply apparatus a main power device, an auxiliary power unit, and controlling means. Each of the main power device and the auxiliary power unit is configured to supply DC power to a DC supply line. The main power device is configured to generate DC power by use of power supplied from a secondary cell. The controlling means is configured to, when a measurement (a magnitude of a current flowing through the DC supply line) exceeds an optimal current magnitude, send an instruction to the main power device such that a current supplied from the main power device to the DC supply line has the same magnitude as the optimal current magnitude. The optimal current magnitude is defined as a magnitude of a current supplied to the DC supply line from the main power device operating so as to maximize a proportion of power supplied from the main power device to the DC supply line to the sum of power supplied from the secondary cell to the main power device and loss caused by an internal resistance of the secondary cell. The main power device is configured to adjust the magnitude of the current supplied to the DC supply line on the basis of the instruction received from the controlling means.

主权项

1. Power supply apparatus comprising:
a main power device and an auxiliary power unit each adapted to be connected to a DC supply line to be connected to a load device and configured to supply DC power to said load device through the DC supply line; load current measuring means configured to measure a current flowing through the DC supply line and output a measurement indicative of a magnitude of the measured current; judging means configured to, upon obtaining the measurement from said load current measuring means, judge whether or not the obtained measurement exceeds an optimal current magnitude; and controlling means, wherein said main power device is configured to generate the DC power supplied to the load device by use of power supplied from a secondary cell connected thereto, the optimal current magnitude being defined as a magnitude of a current supplied to the DC supply line from said main power device which operates so as to maximize a proportion of power supplied from said main power device to the DC supply line to the sum of power supplied from the secondary cell to said main power device and loss caused by an internal resistance of the secondary cell, said controlling means being configured to, upon acknowledging that said judging means determines that the measurement exceeds the optimal current magnitude, send an instruction to said main power device such that a magnitude of the current supplied from said main power device to the DC power line is identical to the optimal current magnitude, and said main power device including adjusting means configured to adjust the current supplied from said main power device to the DC supply line on the basis of the instruction received from said controlling means.