The alternator consists of a rotor and a stator. Can tap off one of 12V series battery in main power for control power. Can use 7 storage batteries in series from car, motorcycle, lawn tractor, etc. Meanwhile, non-sports hybrid cars show consumption figures of up to 28 km per liter depending on driving habits and conditions. So, a 100 amp alternator will require about 4 HP at full output. Such fuse rating also gives some idea regarding the amperage the alternator operates on. If you use an alternator, you will see that the voltage produced by this appliance is about 1-1/2 to 2 volts higher than your battery voltage. It was really consistent with the high being 1.29 and the low 1.26 over the testing pulls. Select if you want power in watts "P/W" or horsepower "P/hp". The average car alternator is rated at 200 Amps at 13.6 Volts = about 2.75 kW. This means to produce 100 amperes of power, the alternator will need 4 HP at full output condition. So, if your electric car has a 60 kWh battery, it will cost about $0.12 x 60 = $0.72 to charge the entire battery. The amount generated depends on how powerful the engine is and how much voltage it can produce. Jul 20, 2010 There have been tests on this.No i dont have the info, but talking to a friend of mine about this awile back who races plymouths from the sixties to current says it takes 15-20 hp to turn the power steering pump and 25 to turn the water pump. The Chevrolet Spark has a curb weight of 2,337 pounds (1,060 kilograms). At 60% efficiency, it would take 480 watts of work from the engine to generate 288 watts of electricity. For example a 100A alternator will provide an output of about 1.5kW at 15V, but will dissipate about 750W internally. For a long time, most alternators don't operate at full output. torque time RPM divided by 5252 will give you horsepower. the. The sperpentine belt it self has inefficiencies (98%) there is windage drag from the alternator spinning even when not loaded. According to his testing, the Lexus IS-F produced 363 hp with the AC on and it jumped up to 372 when the AC was turned off. Then multiply Watts times .00134 to get Horsepower. Alternator cost is between $180 and $1000. The battery is designed to be charged to at least 12.55 volts with a maximum of 14.5 volts, according to the alternator. Source (s): A freind of mine is an HVAC engineer for GM. A large alternator can power up to 200 amps or more. 150 A alternator putting out 13.8 V = 2.77 Hp at 100% efficiency. For such vehicles, the high output alternators usually make use of about 200 to 350 amps while regular size cars with average electric current requirements make use of about 100 amps. Many Asian vehicles, for example, have higher charging voltages of around 15 volts. An alternator typically takes about 1 HP (horse power) for every 25 amps of power generated. How Much Does An Alternator Cost? The alternator speed drops from 5200 RPM to 2800 RPM from this load. Remember that aircon is electronically clutched so that it's not always on and therefore not always using that much power. Several horsepower? What is difference between alternator and generator? To calculate this multiply Amps times voltage to get Watts. if you had a 4 pole 10 kw generator you would need roughly 18 hp to drive it after factoring in efficiency losses. Today SIKKY finds the answer to the age old question, how much horse power does air conditioning actually consume when you use it? 1 horsepower is equal to abou 750 watts of electric power. I loaded the alternator down with what I thought a fair representation of typical application of 65 DC amperes output at 13.65VDC. Most alternators that are charging properly should produce a voltage of about 13.8 to 14.2 volts at idle with the lights and accessories off. If you keep a charging system idle, it will generator 13.8 to 14.3 volts or close. Typically, you can expect the average car horsepower to fall between 180 and 200 horsepower in a mainstream car. 2.4 HP measured on dynamometer 3.0HP by analysis. To move that one foot in one second, you need just 4.24-horsepower. After 1971 you are dealing with dropped compression and changes to idle and timing at . Back of the envelope calculations: 530 watts (0.64 hp) of energy from gasoline to run the alternator under light load. How much horsepower does an alternator use? A car alternator generates electricity, but the amount depends on the type of energy system that it's attached to. In an automobile, the A/C system will use around 5 horsepower (4 kW) It is marked as "citation needed' though so take it with a grain of salt, but it would be approximately correct for when the aircon is activated. But a 150 amp alternator could be hooked up to a 6.5 HP engine and safely charge a 100 amp AGM battery very fast. At 14 volts, because that is usually what an alternators voltage is, and 75 amps is 1050 watts. The power produced by the alt has to come from SOMEWHERE. This was researched by automotive cooling experts Davies Craig that found that its water pumps used 0.13bhp (0.1kW) at 1000rpm, 1.1bhp (0.8kW) at 2000rpm and 8.6bhp (6.4kW) at 4000rpm. The alternator's maximum output is usually listed as the amperage output. So, a 100 amp alternator will require about 4 HP at full output. 2880 watts = 14.4 volts x 200 amps. However, the exact amount of horsepower required by the alternators may vary with the efficiency of the alternator. 4. Drops to about 15% engagement at upper RPM. An alternator has a direct impact on a car's gas mileage, as it helps to power the car's electrical system while the engine is running. It takes about a 1/4 HP to run it on low on a cool day to over 10 HP on a hot and humid day with the fan on full. It's a 300 Watt motor that runs on 24 Volts, capable of around 3000 RPM. The alternator speed drops because the current is limited to 100 Amps by the power source (inverter). It costs about $0.12 per kilowatt-hour to charge an electric car. On average, it takes about 3 kW of energy to power your AC. For example 60 Amps * 14 volts = 840 Watts. And smaller cars can still have fewer than 100 horsepower. 150 amps, and you use 4 horsepower Jon Haddock There are 1440 Watts of the largest window units. At full output, a 100 Amp alternator will need about 4 HP. Alternators are around 40% efficient, motors are 60%, and we replaced one engine driven fan that consumed up to 5 hp with a 400W rated motor fan. What is one of the advantages of an alternator over a generator in an airplane engine? For 12v and 150A, the alternator puts out 12*150 = 1800 watts or 1.8 kW. The YouTuber strapped a Lexus IS-F to a Dynapack dynamometer, which measures the horsepower at the car's hubs. An alternator typically takes about 1 HP (horse power) for every 25 amps of power generated. Assuming that the alternator (And its drive) is about 60% that makes 4.5 kW or about . So, running 30 amp electric fans uses about .66hp, running an electric water pump (about 10 amps I think) uses .2hp. so 6 - 8 Hp is not surprising. I need a headache pill!!! How much HP does it take to drive an alternator? How much HP does an alternator use? So, at worst the electric fan is using 2 hp at the belt. For "P/W" select the formula for speed in RPM. 5. The alternator's power output is its current, times its voltage. One horsepower increase is 10 to 20 horsepower and does not affect the amount of fuel sprayed into the cylinder. Click calculate to find the energy consumption of a clothes washer using 500 Watts for 0.25 hours a day @ $0.10 per kWh. 2. Additionally, how much torque does a car alternator need? According to Wikipedia, a modern alternator is between 50-62% efficient. The average cost is approximately $500. R. Very best regards Geordie To know if the alternator will do the job for your house or not, you need to learn how much voltage it can produce. Horsepower Requirements for High Output Alternators. This is probably RPM dependent so you kind of have to figure it out as worst case. My current fan is pretty much disengaged by 3000, you have to look it up. Most alternators do not operate at full output for very long. Feb 24, 2009. The labor costs to replace an alternator is estimated to be between $120 and $152, whereas parts cost between $180 and $1000. 1hp=746W, so it takes over one hp to turn your car's alternator to full output, not counting losses in heat or the belts. That's why they have such a big fan on the front of the alternator. How much horsepower does it take to run a 200 amp alternator? How much horsepower does a generator need? The process of getting more power out of an automobile is an ever-changing cycle of improvement. Is there a significant dif. This estimate will be high, since a power factor of 1 is assumed. In practice it spends very little time at high speed (1%>>). This week we test a mechanical water pump to see how much horsepower it really takes to spin vs using an electric pump. Searching for car alternator conversions reveals a variety of pages, HOWTOs, and guides, many of which can be extremely confusing and overcomplex. I have a 2 receiver hitch on back which should hold this ok . Most alternators have between 50 and 150 horsepower, with the specific value depending on the model and design of the alternator. After that, the battery won't have enough charge to power the car's electrical components, and the car will stall. The Dodge Viper, with a curb weight of 3,374 pounds (1,530 kilograms), needs just 6.13-horsepower to cover one foot in one second. (no load) to 2.8 HP. A car without an alternator will only go as far as the battery can power it, typically at a maximum range of around 25 miles or 40 kilometers. kW and HP are both measures of power; much as meters and feet are both measures of length. However, the exact amount of horsepower required by alternators may vary depending on the efficiency of the alternator. Do the math . The central A/C Fan compressor is 750 watts and usually uses about 1 to 2 kW of power. However, the range will likely be as low as 2 or 3 miles. How much power does AC take from the engine? How powerful is car's air conditioning system in watts? 2. So at full tilt boogie, it's doing roughly 14V at 200 amps, which is 2.8 kW. If an alternator is not working properly, it can cause the car to use more fuel as it tries to compensate for the lack of power. How much gas does a . Difference in horsepower is the difference between the old 1969 SAE dyno hp ratings the factory used and the newer NET horsepower ratings used in 1971 with a mechanical fan, alternator, and water pump installed (minimal number of power robbing accesories). 1 Hp = 748 Watts. 3. The YouTuber strapped a Lexus IS-F to a Dynapack dynamometer, which measures the horsepower at the car's hubs. that equates to 3000, 1500 and 1000 rpm at 50 hz. BangShift.com presents BangShift TECH. The compressor on the central A/C Fan is 750 Watts. Watts are calculated as volts x amps, so for example, if you had a 100 amp alternator then 12 volts x 100 amps = 1200 watts divided by 300 watts equals around 4 horsepower. However, alternators are only 40% efficient at best, XXXXX XXXXX 1 horsepower actually produces around 300 watts. And it will require approximately two horsepower. In a modern automobile, the A/C system will use around 4 horsepower (3 kW) of the engine's power, thus increasing fuel consumption of the vehicle. A car alternator requires 1 HP to produce every 25 amperes of current. Per dynamometer. Does car AC use a lot of electricity? It also depends on your acceleration and the year (most cars manufactured after . How much horsepower does an alternator Rob? . Add fuel injector parts, and you need more valves. How much force does it take to turn an alternator? In real world it is roughly 2 horsepower needed to make 1000 watts. So, how much power does an alternator produce? According to his testing, the Lexus IS-F produced 363 hp with the AC on and it jumped up to 372 when the AC was turned off. From the website Inteckopen.com you can see that 50% is typcial. As to the question of how much power it draws, there's no one answer, as it depends on the make and model, the engine, the condition of the engine and the air conditioning system and much more. However, larger and more luxurious vehicles, like an SUV or performance sedan, will often have a base-level engine that exceeds 300 horsepower. It is good to note that this price range is not the same everywhere. 840 * .00134 = 1.13 HP. However, this price may vary depending on your location and the time of day you're charging your car. Just for a point of reference, a standard automotive alternator puts out 60A @ 14V=840W. A washing machine will use 400 to 1300 watts, with modern Energy Star rated models using about 500 watts. And while that power loss could be relevant to that specific car especially since it has a large V8 . How much horsepower from the engine is used by the alternator to provide electrical power in the average passenger car? That is about 180 amps drawn from your alternator circuit. In turn, a large six-cylinder vehicle has an estimated performance of 9 to 12 kilometers per liter, and in eight-cylinder units it lasts from 8 to 10 kilometers per liter. It does this to offset the power drawn by the air conditioning system. The rest of the time it is at 1/2 power (~1%),1/4 (~10%) or off. 1. At 4500RPMs the alternator averaged over the 4 tests a measily 1.28 hp loss. So just work it in reverse. But wait, there's more! In general, the alternator can generate up to 2500 watts of electricity. How many watts does a car air conditioner use? This alternator is rated . Plus. For best efficiency, turn the vent to recirculate and turn the fan down as low as comfortable. [note, 1 HP is 746 watts] The Alternator itself is only usually about 50-55% efficient. An alternator is more efficient than a generator and produces less waste heat. Can also use appropriately-sized lithium-ion to reduce size and weight. Most alternators do not operate at full output for very long. the car's electrical accessories have fuse ratings. This means that in order to produce 100 amps of power, the alternator will need 4 HP in the case of a full output. The amount of energy your car pulls varies based on the make, model, and condition of your car. equals. The actual electric load on the alternator. A rough estimate of the output is multiplying the voltage by the amps output, since 1 watt = 1 volt * 1 amp. If you then consider the mechanical power required to spin and cool the alternator your overall efficiency drops to about 20-25% including the engine losses. Alternator An alternator takes about 1 HP for every 25 Amps of power. I changed my fan clutch last year from a HD Thermal to the RPM limited clutch type. I kind of remember the factor for parasitic drag being about 5HP per belt. This one-wire alternator puts out 80 amps at idle speed and 140 amps max, more than enough to power electric fuel pumps, a huge audio system, or whatever else you want to attach to the battery.. How Much Does It Cost to Charge an Electric Car? Of course, a car that can only cover a foot at a time is pretty useless. Generators are typically 2 pole 4 pole or 6 pole. Assuming the alternator is about 90% efficient, and running at 14.5v, a 45 amp draw from the alternator requires 1 engine hp. A car alternator requires 1 HP to produce a current of every 25 amps. For example a 100A alternator will provide an output of about 1.5kW at 15V, but will dissipate about 750W internally. In this video, a small alternator is tested to see how much power it can output with a maximum current limited to 100 Amps: . I can get a new 6.5 HP engine from harbor freight for $120 on sale, a used 150 amp alternator with pulley for around $75, maybe $50 foe engine pulley, wire, brackets etc. How Much Does An Alternator Affect Gas Mileage? Always refer to the vehicle manufacturer's specifications. This is a relatively small alternator.
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