# Can a car alternator produce AC current?

## Can a car alternator produce AC current?

Car batteries operate on one-way direct current (DC) electricity, while alternators output alternating current (AC) electricity, which occasionally flows in reverse.

Can you use an alternator for a wind turbine?

Windmills can provide you with electrical power for free – but to convert motion into current you’ll need a generator. “A car alternator could be a handy solution if you’re stuck, producing a steady 12 volts as its spindle is turned,” says Dartnell.

Can you run an alternator with an electric motor?

Yes you can run a Alternator with a electric motor. To figure the horse power it is 746 watts of power for 1 HP. that means you have to have 1.34 hp for each kw or kva.

### Does an alternator put out AC or DC power?

The output of an alternator is direct current (DC). When the alternator pulley is rotated, alternating current (AC) passes through a magnetic field and an electrical current is generated. This is then converted to DC via the rectifier.

Why is an alternator better than a dynamo?

The major advantage of an alternator over a dynamo is that it is a three phase unit as compared to a single phase unit. In simple terms, alternator will give a much higher charge rate at slow speeds (idle) since on one rotation of the pulley will cut through 3 magnetic flux fields instead of just one.

How fast does an alternator have to spin to produce electricity?

Alternator may not generate sufficient charging voltage until alternator speed is greater than about 2000 RPM. Typically, alternators have their full output rated at 6000 RPM but can continue to spin up to 12,000 RPM or more without any additional increase in output.

## What is the minimum RPM of a 12v car alternator?

The minimum RPM of a 12 volts alternator is nearly 1800 RPM. The exact value of the RPM depends upon the specifications of the alternator. A normal car idles at 750 RPM whereas a sports car idles at 1250 RPM. Any value of RPM above 1800 for a 12 volts alternator is capable of sending current.

Does it matter which direction an alternator spins?

Yes. The spinning makes three-phase alternating current that will be the same no matter which way it’s spinning. The diode pack (six diodes) turn it into direct current. The polarity will be correct as well.

At what RPM does a alternator charge?

### Where does the alternator exciter wire go?

The wire is connected to the “L” terminal of the alternator. The exciter wire is used to turn on the voltage regulator. This wire, when unplugged, should have approx. 12.5 volts with the key on.

What is differential protection of generator or alternator?

Differential Protection of Generator or Alternator. Any internal fault inside the stator winding is cleared by mainly differential protection scheme of the generator or alternator. The differential protection is provided in the generator by using longitudinal differential relay.

What are the causes of differential relay malfunction?

If there is any major mismatched in the current transformer’s characteristics of both sides of the generator, there may be high chance of malfunctioning of differential relay during the fault external to the stator winding and also may be during normal operating conditions of the generator.

## Why do we use dedicated current transformers for differential protection?

It also ensures that if one set of CT has been saturated, there will be no possibility of malfunctioning of the differential relay. It is always preferable to use dedicated current transformers for differential protection purpose because common current transformers may cause unequal secondary loading for other functionalities imposed on them.

What is percentage biased differential relay?

The percentage biased differential relay comprises two restraint coils and one operating coil per phase.