The invention provides a forced discharge control system of a smoothing capacitor, which improves the reliability of forced discharge control of the smoothing capacitor. When the smoothing capacitor (42) is forcibly discharged, first discharge control in which the charge of the smoothing capacitor (42) is consumed by the in-vehicle device (12) via the DC-DC converter (50) is started in a state in which the battery (20) is cut off from the high-voltage circuit (9). Thereafter, when the voltage of the smoothing capacitor (42) drops and reaches a predetermined threshold value (V0), a second discharge control is executed in which the active discharge circuit (61) forcibly discharges. When the continuous forced discharge occurs, delay control for delaying the execution timing of the second discharge control is also executed.
本发明提供平滑电容器的强制放电控制系统,提高了平滑电容器的强制放电控制的可靠性。在对平滑电容器(42)进行强制放电时,在将电池(20)从高电压电路(9)切断的状态下,开始由车载设备(12)经由DC‑DC转换器(50)消耗平滑电容器(42)的电荷的第一放电控制。之后,在平滑电容器(42)的电压降低而到达了规定的阈值(V0)时,执行由有源放电电路(61)强制放电的第二放电控制。在产生了连续强制放电的情况下,还执行使第二放电控制的执行定时延迟的延迟控制。
Forced discharge control system of smoothing capacitor
平滑电容器的强制放电控制系统
2023-12-01
Patent
Electronic Resource
Chinese
IPC: | 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 / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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