The invention relates to a method (S1-S8) for supplying an NV on-board network (NVN) of a vehicle from an HV on-board network (HVN) of the vehicle with an adjustable value (Iout, maxdef, Iout, maxred) of a current saturation (Iout, max) by means of at least one electrically isolated DC voltage converter (GSW1, GSW2, GSW3), in which an auxiliary voltage (Vin, th) is determined (S0) at the DC voltage converter (GSW1, GSW2, GSW3), said auxiliary voltage being between a nominal voltage (Vin, th) of the HV on-board network (HVN) and a nominal voltage (Vin, th) of the HV on-board network (HVN). Between a reference value (Iout, max) of the current saturation (Iout, max) and a specified minimum input voltage (Vin, min), an associated input power (Pin) is determined (S5) when the input voltage (Vin) measured at the DC voltage converter drops (S1) below a value of the auxiliary voltage (Vin, th), a power-adapted value (Iout, max) of the current saturation (Iout, max) is calculated from the previously determined input power (Pin), and this value is adjusted (S5) in place of the reference value (Iout, max) of the current saturation (Iout, max), in order to determine the current saturation (Iout, max) of the current saturation (Iout, max). And resetting (S3) the current saturation (Iout, max) to a standard value (Iout, maxdef) only when the input voltage (Vin) reaches (S2) the nominal voltage (Vin, nom) of the HV partial on-board electrical system (HVN) again.
本发明涉及一种用于通过至少一个电隔离的直流电压变换器(GSW1、GSW2、GSW3)以电流饱和度(Iout,max)的可调节值(Iout,max|def、Iout,max|red)从车辆的HV部分车载电网(HVN)给车辆的NV部分车载电网(NVN)供电的方法(S1‑S8),其中,在直流电压变换器处(GSW1、GSW2、GSW3)确定(S0)辅助电压(Vin,th),该辅助电压介于HV部分车载电网(HVN)的额定电压(Vin,nom)和规定的最小输入电压(Vin,min)之间,当在直流电压变换器处测量的输入电压(Vin)下降(S1)到辅助电压(Vin,th)的值以下时,确定(S5)所属的输入功率(Pin),根据之前确定的输入功率(Pin)来计算电流饱和度(Iout,max)的经功率适配的值(Iout,max|red),并调节(S5)该值,代替电流饱和度(Iout,max)的标准值(Iout,max|def),以及当输入电压(Vin)再次达到(S2)HV部分车载电网(HVN)的额定电压(Vin,nom)时,才会将电流饱和度(Iout,max)重置(S3)到标准值(Iout,max|def)。
Supplying low-voltage on-board electrical system of vehicle from high-voltage on-board electrical system of vehicle
从车辆的高压部分车载电网给车辆的低压部分车载电网供电
2024-12-10
Patent
Electronic Resource
Chinese
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / 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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