| 摘要 |
A voltage controller is operable to generate control signals for controlling an intermediate bus voltage (VIB) in an intermediate bus architecture power system, the intermediate bus voltage comprising a voltage output from a first stage DC-to-DC power converter to at least one second stage DC-to-DC power converter via the intermediate voltage bus in the intermediate bus architecture power system. The voltage controller comprises a receiver operable to receive values of the current input to the first stage DC-to-DC power converter, or the current and voltage output by the first stage DC-to-DC power converter. The voltage controller further comprises an efficiency measuring unit operable to determine a measure of an efficiency of the intermediate bus architecture power system in accordance with the received values. The efficiency measuring unit is operable to: determine a first value of the efficiency measure using the received values corresponding to a first intermediate bus voltage (VIB); and determine a second value of the efficiency measure using the received values corresponding to a second intermediate bus voltage (VIB) higher than the first intermediate bus voltage. The voltage controller also includes a control signal generator operable to generate control signals to cause the first stage DC-to-DC converter to set the intermediate bus voltage (VIB) to a voltage higher than the second intermediate bus voltage if the second efficiency measure value represents a higher system efficiency than the first efficiency measure value, and to a voltage lower than the first intermediate bus voltage if the second efficiency measure value represents a lower system efficiency than the first efficiency measure value.
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