Power supply control apparatus for electric vehicle
一种电源控制、电动车辆的技术，应用在交流电动机控制、电动汽车充电技术、电动汽车等方向，能够解决禁用车辆驾驶等问题
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no. 1 example
[0054] Briefly, the technique according to the present embodiment is based on the idea that if a minor short circuit does not lead to erosion of surrounding components of the resistive element 21 , retrying precharging does not have any disadvantages and can therefore be tolerated.
[0055] image 3 is a time chart illustrating the determination of whether to enable retry based on the change of the precharge current Ipre. Whether the peripheral members of the resistance element 21 corrode can be determined from the rated capacitance of the resistance element 21 or a specific allowable current determined from the allowable heat generation value determined from the allowable temperature of the peripheral elements. A permissible determination value I0 considering a slight margin is set on the low current side with respect to the permissible current of the resistance element 21, and if the precharge current Ipre decreases to the permissible determination value I0 or less during pr...
no. 2 example
[0080] Briefly, the technique according to the present embodiment is based on the idea that even if a timeout occurs before precharge is completed, a case where precharge current Ipre decreases to a value determined to indicate precharge completion is assumed to correspond to an open fault.
[0081] Figure 6 is a graph illustrating whether to start a retry is determined based on a change in the precharge current Ipre. The precharge current Ipre acquired when the precharge of the smoothing capacitor 19 is normally completed to satisfy the condition (ΔV≦ΔV0) with respect to the capacitor voltage Vcon can be determined by the capacitor voltage Vcon / resistance R of the resistive element 21 . In this embodiment, the precharge current Ipre in this case is set to the permissible judgment value I0, and if the precharge current Ipre decreases to the permissible judgment value I0 or less during the precharge, the resumption of the precharge is allowed. try.
[0082] Therefore, when t...
no. 3 example
[0090] Briefly, the technique according to the present embodiment is based on the idea that a case where the precharge current Ipre enters the low current side region with respect to the locus followed by the precharge current Ipre in the normal state is assumed to correspond to an open fault.
[0091] Figure 7 is a graph illustrating the determination of whether to enable retry based on a change in the precharge current Ipre. Such as Figure 7 As shown by the solid line in , if the precharging of the smoothing capacitor 19 is normally completed, the precharging current Ipre rises simultaneously with the turning on of the precharging contactor 20, and then gradually decreases to approach 0A. In this case, the permissible region E is set on the low current side with respect to the locus of the precharge current Ipre. In the present embodiment, the allowable region E is set to have a lower limit of 0A and an upper limit equal to the allowable determination value I0 (predeterm...
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