Power generation control device for idling stop vehicle

Abstract

The invention provides a power generation control device of an idling stop vehicle, which can constantly supply proper charging voltages without changing a current wire harness whether the charging residue of a battery is large or small. In a moment (t1), lag angular coordinate (theta x) power generation among gain control is started. In a moment (t2) when the lag angular coordinate (theta x) exceeds a switching threshold value (theta ref) and lasts for a designated voltage boost judging period (delta), voltage boost control starts in a moment (t3). The voltage boost control is performed in a way to simply gradually increase a target adjusting voltage (Vt) through an increase rate (delta V). Later in a moment (t6), decrease control on the lag angular coordinate (theta x) is started. In a moment (t8) when the lag angular coordinate (theta x) is lower than the switching threshold value (theta ref) and lasts for a voltage decrease judging period (delta), voltage decrease control is started in a moment (t10). The voltage decrease control is performed in a way to simply gradually decrease a target adjusting voltage (Vt) through a decrease rate (delta V).

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.

Images