The invention relates to the technical field of power supplies, and in particular relates to an emergency power supply device of an electric power steering system. Under the condition that high-voltage power transmission is normal, a bidirectional DC-DC power supply module controls a high-voltage bridging loop to be conducted, high-voltage power is reduced through a transformer, and meanwhile, a low-voltage bridging loop and a boosting loop are controlled to be cut off. At the moment, the bidirectional DC-DC power supply module enters a forward step-down power transmission state to charge a low-voltage power supply. In the case of abnormal high-voltage power transmission, the bidirectional DC-DC power supply module controls the high-voltage bridging loop to be cut off; the low-voltage bridging loop and the boosting loop are conducted; low voltage output by the low-voltage power supply enters a reverse power transmission state after being boosted by the boosting loop; and after being connected with the transformer through the low-voltage bridging loop, the boosted voltage is further boosted under the action of the transformer and then input into the electric power steering system toserve as an emergency power supply to supply power to the electric power steering system, so that safe and stable operation of the electric power steering system can be guaranteed, and the overall size is reduced.
本发明涉及电源技术领域,尤其涉及一种电动助力转向系统应急电源装置。在高压输电正常的情况下,双向DC‑DC电源模块控制高压桥接回路导通,并通过变压器将高压电降压,同时控制低压桥接回路和升压回路截止,此时双向DC‑DC电源模块进入正向降压输电状态给低压电源充电。在高压输电异常的情况下,双向DC‑DC电源模块控制高压桥接回路使其截止,并将低压桥接回路和升压回路导通,由低压电源输出的低电压经升压回路升压后进入反向输电状态,并通过低压桥接回路连接到变压器后,经变压器作用进一步升压后将升压电压输入到电动助力转向系统,作为应急电源为其供电,不仅可以保证电动助力转向系统的安全稳定运行,还使总体体积减小。
Emergency power supply device of electric power steering system
一种电动助力转向系统应急电源装置
2020-08-04
Patent
Elektronische Ressource
Chinesisch
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B62D MOTOR VEHICLES , Motorfahrzeuge / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
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