How much power can an alternator motor make? You know that alternators can run as motors. It needs a big and complicated electronic unit. The rated power in generative mode is about 1400 Watts for a 14 Volts 100 Amperes altenator, for running in motor mode it needs 36 Volts power supply.

How much HP does an alternator add? The Alternator itself is only usually about 50-55% efficient. For example a 100A alternator will provide an output of about 1.5kW at 15V, but will dissipate about 750W internally. That’s why they have such a big fan on the front of the alternator.

Can you use alternator as a motor? The humble automotive alternator hides an interesting secret. Known as the part that converts power from internal combustion into the electricity needed to run everything else, they can also themselves be used as an electric motor.

How efficient is an alternator as a motor? The standard alternators generally have a maximum efficiency rating somewhere in the 55–60% range and the high-efficiency models are generally in the 68–75% range. These efficiency gains are mostly due to using conductors that allow greater fill of the windings in the alternator.

## How much power can an alternator motor make? – Additional Questions

### How much torque is needed to turn an alternator?

If your alternator demand is for example, 2kW, then you need 2.7 HP from the motor to drive it. The details of RPM and torque vs. power you’d have to get from the alternator supplier. Typical alternators were 50-70A at 12V, or about 720W (roughly 1HP.)

### How many rpm does an alternator need?

Most alternators need to spin at about 2,400 rpm at idle, have their maximum output above 6,000 rpm, and should never exceed 18,000 rpm.

### Why are alternators so inefficient?

Automotive alternators are inefficient because they’re using a 50 year old passive overload protection design. You can put unlimited load on a generator with the field current at maximum and as long as the Voltage does not fall below 12 Volts it won’t be damaged by overheating, at least not right away.

### How much fuel does an alternator use?

So yes, more electrical load consumes more fuel. A fully loaded alternator can consume 100 Ampere(boils down to ~1.3kW) if you go crazy with your radio. That’s roughly 10% of the total load on the engine at 100km/h. Most people won’t go that far though.

### What are the power losses of alternator?

Power losses occur in the alternator due to a number of different mechanisms. These can be lumped into 3 categories: electrical, magnetic, and mechanical. occurs when current flows through a resistance. Another source of ohmic loss, but considerably smaller, occurs in the rotor field winding.

### What are the losses of an alternator?

In the alternators, there are two types of mechanical losses viz. friction losses and windage losses. The friction losses occur due to the friction in the moving parts such as bearings etc.

### Will a new alternator improve performance?

More Efficient.

You may need to constantly replace your regular alternator because you’re always pushing it to the edge. However, a high output alternator will save you money in the long term by getting more out of it.

### Does alternator affect fuel consumption?

Improvements to alternator efficiency can reduce the amount of power drawn from the engine and thus lead to improved fuel consumption.

### How long will a car run without alternator?

Without this essential component, your car will only function for up to two hours and as little as five minutes. Those with an older car model or a vehicle that runs on diesel will have the most run time.

### Do alternators fail suddenly?

When your alternator begins to fail it can cause a variety of different electrical problems in your car, and eventually cause a breakdown. Alternators can go bad suddenly, or slowly over time.

### Does a new battery improve gas mileage?

A full charged battery works like a blessing for the fuel injectors that add fuel in the cylinders. If the battery is not full charged then the fuel is not fully added and it results in reduced mileage. In such case you will be able to observe that the car is lurching often on the drive.

### Can a battery be too strong for a car?

The battery capacity won’t impact it at all except taking longer to charge. The vast majority of the alternators output is directed to running the vehicle and any accessories. The charge rate on any battery is well below what the battery is rated for.

### Does weak battery affect engine performance?

Internal components: A weak battery affects performance by causing damage to the engine’s internal parts. The low voltage causes the temperature to go up, and overheating can result, which causes damage to the engine parts.

### Does having your car battery on waste gas?

As a matter of fact, allowing your car to idle for two minutes is equivalent of driving a mile. You can waste almost a gallon of gas if you leave your car idling for more than an hour. Burns up oil. Longer time leaving your engine running causes more motor oil to be circulated and burned up.

### Is it better to idle in neutral or park?

Keeping an automatic transmission in Drive puts an extra load on it, which drains fuel. In neutral, it’s resting — or at least as close to rest as an automatic ever gets. This shift is even more important when the air conditioner is running, so the engine doesn’t have to strain so hard while idling.

### Is it OK to let car idle for 10 minutes?

When it comes to the modern vehicle sitting in your garage today, you shouldn’t let your engine idle. Your vehicle does not need more than a few seconds to start up. Leaving it idling actually can be detrimental, and it wastes fuel, which causes a negative environmental impact as well.

### Does idling with AC on drain battery?

As long as the alternator is providing enough output to charge the battery at idle there should be no battery problem, at idling the voltage should read 14v (+/- .

### What kills the battery in a car?

7 Things That Can Drain Your Car Battery
2. Something is causing a “parasitic draw.”
3. Your battery connections are loose or corroded.
4. It’s extremely hot or cold outside.
5. The battery isn’t charging while you drive.
6. You’re taking too many short drives.