Power generation control device for idling stop vehicle

Abstract

The present invention provides a power generation control device for an idling stop vehicle, which can always supply an appropriate charging voltage regardless of the remaining charge level of the battery without changing the existing wiring harness. At time (t1), incremental control of the power generation amount by increasing the hysteresis angle (θx) is started. At time (t2), when the hysteresis angle (θx) exceeds the switching threshold (θref) and continues for the prescribed boost judgment time (△), at time (t3), boost control starts, and the boost control starts with an increase rate (△V) Gradually and monotonically increase the target adjustment voltage (Vt). Thereafter, at time (t6), the reduction control of the power generation amount to reduce the hysteresis angle amount (θx) is started. At time (t8), when the hysteresis angle amount (θx) is lower than the switching threshold (θref) and continues for the pressure reduction judgment time (△), at time (t10), the pressure reduction control starts, and the pressure reduction control starts at a reduction rate ( △V) gradually and monotonically decreases the target adjustment voltage (Vt).

Description

technical field [0001] The present invention relates to a power generation control device for an idling stop vehicle, in particular to a power generation control device for an idling stop vehicle capable of solving the problem of insufficient charging caused by the reduction of the generated power due to the resistance of the electric harness of the charging system and the reduction of the charging voltage. Background technique [0002] As a power generator for a vehicle, a three-phase synchronous generator driven by an engine is known. The AC power generated by the three-phase synchronous motor is rectified by the three-phase full-wave rectifier, the voltage is adjusted, and the storage battery is charged. Patent Document 1 discloses power generation control. In a system that supplies electric power generated by a generator driven by an engine to a storage battery and an electric load, the drive circuit performs the energization of the stator coils at an advanced angle or a...

AI Technical Summary

Problems solved by technology

However, it is foreseeable that if the cable wires are thickened, the weight will increase, or the wiring bundle will be made stronger or the volume will increase, which will inevitably require a design change, or reduce the workability of the vehicle assembly.

On the other hand, if the target adjustment voltage is set uniformly high considering the voltage drop caused by the resistance of the harness, there is a possibility that the battery will be overcharged.

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