| 摘要 |
The control system for an UltraCapacitor (or "SuperCapacitor) based energy storage system consists of a relay switch, a voltage up-converting device (e.g. DC-DC converter), regulated power supplies and a comparator circuit. The comparator circuit compares the storage system output voltage with a reference voltage, causing the storage system output to be diverted through a voltage up-converting device when the said voltage has declined to a threshold value (typically set by the load requirements). Wide-input range power supplies enable consistent operation of the circuit as the UltraCapacitor system output bus voltage declines. The wide-range of input allowed by the up-converting device enables the continuance of power drain from the UltraCapacitors, i.e. more efficient use of available storage capacity, while maintaining the required output voltage to the load. Efficiency is increased by direct connection of the UltaCapacitor system to the load bus until its voltage falls below stated threshold. In the case of a given 48 VDC system electric motor application, 500% more energy is extracted from the UltraCapacitor system with the stated control system than would be permitted by the load voltage requirements without such system. |
