What happens to alternator current when battery voltage increases?

And when there is more power, the faster the charging of battery as the power to be supplied to other electrical consumer is more than enough. Current is inverse with voltage. When the alternator current is high at low speed, battery voltage will drop, and will need more time to get fully charged.

How do you control alternator output?

Current measurement. The current flowing through the rotating solenoid (rotor) is the decisive factor for regulating the output generated by the alternator. This current is used to alter the magnetic field. It is controlled by the alternator regulator based on the battery voltage, which has been measured in advance.

Is it normal for an alternator to not charge?

Still, it’s perfectly normal for others to see the alternator not charge at all intermittently. One test is not enough if you are diagnosing a charging system problem. All too often, the alternator is condemned as the source of the problem if only battery voltage is present with the engine running.

What should the voltage be on a bat alternator?

Measure the voltage across the battery and the big bat alternator terminal to alternator case. There are two things that you are looking for. The charging voltage should be between 13.9v to 14.4v. Also the voltage at the battery and the voltage at the alternator should be within 0.5v of each other.

What to do if your alternator has bad ground?

Place the red lead on the positive battery terminal (if possible dig it into the battery post, not the terminal). Place the black lead on the bad post of the alternator. Same thing as above, if the voltage is above 0.5v then examine the positive cabling for problems.

Can a new alternator run over 14.5v?

Bought a replacement alternator but I am sending it back as I measured and have seen it running over 16.5V. The manual says the regulator should keep it to a max of about 14.5V. I put a brand new and fully charged battery in at the same time the alternator was changed, so I don’t think the battery can be blamed.

Still, it’s perfectly normal for others to see the alternator not charge at all intermittently. One test is not enough if you are diagnosing a charging system problem. All too often, the alternator is condemned as the source of the problem if only battery voltage is present with the engine running.

Can you bypass the voltage regulator on an alternator?

On many alternators (except those with computer voltage regulation), you can bypass the voltage regulator to test whether your voltage regulator or some other component (alternator or charging circuit) is at fault.

What should I do if my alternator voltage is too high?

Power diodes have a voltage drop that is less sensitive to variations in current than resistors. But that is not applicable here because you must protect the battery by reducing the peak battery voltage, by fixing the problem. at 16 volts it should be boiling your battery electrolyte. Check it, and catch some rainwater to refill if low.

Can a remote sense alternator be too high?

assuming there’s not much voltage drop between there and the battery. Other alternators are “Remote Sense” and use a third wire to measure voltage over closer to battery. the alternator thinks the battery is low so obediently goes to full output trying to charge it back up. Here’s some Delco-Remy info on remote sense alternators.