How many rpms does an alternator require

You could read this report from Remy which lays out some of the losses. You will notice that the losses are dominated by the engine and mechanical drive system. From the report this graph may address the alternator losses alone:. The amount of power at idle, normal and maximum is alternator dependent. Most alternators need to spin at about rpm or more to provide maximum output, and in most vehicles you will see max alternator rpm around rpm. The efficiency and power output of an alternator can be improved markedly by moving to synchronous rectification and raising the output voltage using load dump configurations.

Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. How many horsepower does an alternator take from an engine at different speeds?

Asked 2 years, 11 months ago. Active 2 years, 11 months ago. Viewed 3k times. Will let you know about all the pitfalls and mishaps. If there's anything new I learn, I will share that also. DavidR, you suggested that I would run into problem wiht my plan to attach each inverter to my grid seperately.

If I were using more than one inverter, without a grid tie inverter, how do you suggest that multiple inverters could be tied into your grid? Your inverters need to be able to synchronize their output waveforms. Grid tie inverters do this by "watching" each other actually, they all watch the grid, and sync to that. If you're not going to use grid tie inverters, you need stackable inverters.

These are designed specifically to be connected in parallel for more current or series for more voltage. They have communication links so they can talk to each other and synchronize their waveforms. A web search will turn up some manufacturers, including Chinese companies of unknown reputation, if that's your speed. Be sure you follow the manufacturer's instructions for stacking your inverters. You seem to have your heart set on doing this, so let me remind you one more time not to put the cart before the horse.

Right now, you shouldn't be worrying about how to couple your PV or wind output to your home electrical system. That should be way down your list. Then, you need to figure out how many PV panels or wind machines you need to supply that much energy. Worry about peak power later. Most likely, your next step will be to figure out how to reduce your energy use, to make your solar or wind system practical and affordable. But just for fun, let's see what it would take to give you a system capable of supplying 40kW from solar panels, using the power conversion system you've described.

So you need enough solar panels to supply , Watts. For example, let's consider the LG N1C panel. It's rated to produce watts. That's at high noon under a clear sky, and most of the day it will output much less. But to make the math easy, we'll make believe that it's high noon all day long where you live. This panel is 67" x 40", weighs 40lb. The link is meant as an example, and is not an endorsement of the product or vendor.

Do you have a south-facing roof that's 11, square feet? That would require a one-story home 30 degree roof of about 19, square feet, or a two-story home 45 degree roof of about 32, square feet. The average US home is 2, square feet. I guess that if you have a 19, - 32, square foot house, you probably can. You are certainly giving me a harsh dose of reality but I am stubborn, I will keep pushing until I find an affordable solution.

Thank you David. Please is it real about self running generator, i yes, I have a 50kW brushless alternator that I want to use as a self run generator to supply electricity for my village people, how many kW motor do i need to run it to give out power that will be able to supply itself and at the same time giving current to my people.

Thanks in advanced. Indem Sie weiterhin auf der Website surfen bzw. Mehr erfahren. Ultimate Lighting Sale. Bathroom Vanity Sale. Bestselling Chandeliers and Pendants. Sign In. Join as a Pro. Houzz TV. Houzz Research. Shop Featured Holiday Categories. Home Decor. Holiday Decor.

Christmas Trees. Holiday Lighting. Gift Cards. Renewable Energy for the Home. Like how many rpms would I need to get at least amps out of a 60 amp alternator? Email Save Comment Sort by: Oldest. Newest Oldest. Hi, I suppose it depends on the alternator. Is this a renewable energy question? For windmill? Like Save. Related Discussions No white kitchen for me, need alternatives Q.

I had my painter do an automobile paint finish on my white cabinets and they have held up very well in Southern California Another option would be powder coating your cabinets white. If you are re-using your old cabinets you can take the doors off and powder coat them. They get the most wear and tear. Our clients often ask for white cabinets and I haven't heard of a problem yet You really should give yourself the cabinets that you have always wanted.

Why compromise? I am posting an image of a white kitchen in a project that we just completed in San Clemente, CA. HD pirouettes - love them! Some fabric or wood shades are nice too. We have those too. Need help finding a less expensive wood floor alternative Q. Have you tried other options such as vinyl, laminate or cork? I have a high-end printed cork not trying to sell Is it possible for you to "mix and match" the quality of the flooring to suit the situation.

Example: High-end product in the kitchen and hallway. Medium end product in living room and office. Low er end product in bedrooms. The main difference between them is in regard to what spins and what is fixed. In an alternator , electricity is produced when a magnetic field spins inside the stator windings of wire. In a generator , on the other hand, the armature or windings of wire spin inside a fixed magnetic field to generate electricity.

An alternator works together with the battery to supply power for the electrical components of the vehicle. 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.

The alternator is designed to keep the battery charged to at least The amperage output is usually listed as the maximum output of the alternator. Yes, alternators generate electricity most efficiently when driven by an internal combustion engine. Their application in a motor vehicle is common. Also as a stationary power source to charge batteries for off the grid power. But you may be considering a wind driven alternator for off the grid power. Normal Output An alternator should put out between The alternator should be tested with the engine idling and electrical accessories, such as the radio and headlights, turned off.

The minimum RPM is highly dependent on the specification of alternator. But a basic alternator will produce charging current anything above rpm. We can safely say, an economy car will idle around rpm, a sports car around rpm and a race car around rpm. For a slower diesel engine a 4-pole alternator is typical. This runs at or rpm for 50 or 60Hz.

This is also a cylindrical design. For water turbines a 6 to 12 pole alternator may be used. Divide your alternator pulley size into your crank pulley size to get the ratio. Example: If you have a 6" crank pulley and a 2" alternator pulley. What are the factors that determine the frequency of an alternator? What is the mathematical formula for determining the frequency of an alternator? Calculate the pulley ratio by dividing the pulley's pitch diameter by the pitch diameter of the drive pulley.