Vehicle power generation control device

A vehicle power generator comprising:

• a field winding that generates a magnetic field;
• an armature winding that generates electromotive force due to the magnetic field generated by the field winding to induce an alternating-current output;
• a rectifying device that rectifies the alternating-current output from the armature winding;
• a vehicle power generation control device comprising:
• communication means that receives a first limit value, related to restriction of an excitation current flowing to the field winding, when the first limit value is transmitted from an external device;
• excitation current control value determining means that determines a second limit value, related to restriction of the excitation current to be a control value for the excitation current, the second limit value being stored in an own vehicle power generation control device, the excitation current control value determining means determining the first limit value to be the control value, instead of the second limit value being the control value, when the first limit value is received by the communication means;
• and
• excitation current control means that controls the excitation current flowing to the field winding, based on the control value that has been determined by the excitation current control value determining means.