How much electricity does an electric motor use?

Asked By: Bilaly Schmittele | Last Updated: 23rd April, 2020
Category: automotive green vehicles
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1 Horsepower is equal to 745.7 watts of electrical power, so in theory a 5HP motor operating at 100% efficiency will consume about 3.728kW of power. In one hour, it will use 3728.5 kilowatt-hours. Of course, no motor is 100% efficiency, so the motor will actually consume somewhat more power than this.

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Keeping this in view, how much power does an electric motor use?

W is the power consumption in watts. For example, if the electric motor uses 50 amps at 240 volts, the wattage is 50 x 240 x 1.73, or 20,760 watts. Electricity costs are based on kilowatts (kW), so divide watts by 1000 to convert to kilowatts (20,760 wats/1000 = 20.76 kW). Record the time the motor is in operation.

Beside above, how much does it cost to run a 100 hp motor? Expect actual operating costs to vary. For example, a 460-volt, three-phase, standard efficiency 100 HP motor operating under full load for 8,760 hours per year will probably cost just over $48,000 per year to operate at an electric rate of $0.10 per kWh.

In this regard, how much does it cost to run an electric motor?

Here is a breakdown of how much one 200 hp, 1,800 rpm and 460 V TEFC motor costs in power in a calendar year (7,200 hours of operation): Average cost of power in the United States: $. 068/kWh. Annual Power Cost: $70,669.

How much power does a 50 hp electric motor use?

So divide the output (50 HP) by the efficiency (0.92), to get the energy required to be input into the motor, to get 50 HP. So --- 37,300 Watts / 0.92 = ~ 40,500 Watts is required to be input to the motor to get the 50 HP output.

37 Related Question Answers Found

How many amps does a 1.5 hp motor draw?

Common Horsepower to Amps Conversions
Horsepower Amps Voltage
.75 HP 5.18 A 120 V
1 HP 6.91 A 120 V
1.25 HP 8.63 A 120 V
1.5 HP 10.4 A 120 V

What makes an electric motor more powerful?

We can increase the turning force (or torque) that the motor can create in three ways: either we can have a more powerful permanent magnet, or we can increase the electric current flowing through the wire, or we can make the coil so it has many "turns" (loops) of very thin wire instead of one "turn" of thick wire.

How many kWh does a 1hp motor use?

1 unit = 1 kilowat-hour, i.e. when an electrical appliance consumes 1 killowat of Power for one hour . Here, we have a 1 HP motor. So, 1 HP for 24 hour = 746×24= 17904 Watt-hour which is equal to 17904/1000= 17.904 units.

How many watts is a 1.5 hp motor?

So, 1.5 HP= 1119W=1.119KW or lets say 1.12 KW. So, we see power consumed by motor is 1.12 Kilo Watts.

What determines the power of an electric motor?


In a motor, power is delivered to the load by converting electrical energy per the following laws of science. In electrical systems, voltage is the force required to move electrons. By taking the voltage and multiplying it by the associated current, the power can be determined.

How much does it cost to run a 25 hp motor?

Re: Cost to operate a 25 HP Motor
25 horsepower is about 18.6 KW, so that'd be $1.49 an hour. Your mileage may vary.

How many watts is a 10 hp motor?

There 746 watts for every 1 horse power. So a 10 hp motor will need 7680 watts when operating. In one hour the motor will consume 7.680 KWatt hours. If the units are charged at 10 cents each then then that equates to 10x 7.680 / 100 Dollars = 76.8 cents.

How do you find the input power of a motor?

Given the voltage, armature resistance and Ohm's law, you are able to find the current and therefore get the input power. Then divide your input power by your angular velocity to obtain your torque at that speed. The input power is volts multiplied by amps.

How do you calculate power consumption of a machine?

How to calculate my energy consumption
  1. Calculate Watt-hours Per Day. Device Wattage (watts) x Hours Used Per Day = Watt-hours (Wh) per Day.
  2. Convert Watt-Hours to Kilowatts. Device Usage (Wh) / 1000 (Wh/kWh) = Device Usage in kWh.
  3. Find Your Usage Over a Month.

How much power does a 30 hp motor use?


Designed power capacity of a motor 30 HP,at 415 V, 3 phase power factor 0.8 (assumed). Full load current is , one HP is 745 w, 30 HP is 30 x 745 =23.35 kW, W = V x I x pf, 23.35 = 415 x I x 0.8, I = 23.35 divided by 415 x 0.8 = 67 amps.

How much is a small motor?

The unit is VERY quiet, partly because the base motor is a 3500rpm motor itself. Plenty of torque. In Stock.

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How is electricity cost calculated?

Let's do the math by hand:
  1. power consumption * usage time = power consumed . So we'll consume 10000 watt hours or 10 kilowatt hours of power every day.
  2. The electricity cost is cost = power consumed * energy price .
  3. For the annual cost, simply multiply the daily one * the number of days in a year.

How much electricity does a 3 HP motor use?

Electrical input power = output power / (Efficiency /100). Unit consumed = Power in kW X numbers of hours of operation. = 59.76 units. Hence units burnt (consumed) by 3 HP motor in 24 hours will be 59.76, if the motor efficiency is 90% and motor is fully loaded.

How much electricity does a 3/4 hp motor use?

ELECTRIC MOTOR WATTAGE GUIDE
Motor Rating HP Approximate Running Watts Universal Motors Small Appliance
1/3 450 600
1/2 600 750
3/4 850 1000
1 1000 1250

How much electricity does a 20 hp motor use?


Measure all three phase-to-phase voltages, and average them.
In our 20 hp motor example, let's say we measure 226, 230 and 234 volts, giving an average of 230 volts.

How much electricity does a 5 hp motor consume?

Therefore, the power consumed by a 5 HP motor performing at 80% efficiency will be: Output mechanical energy: 5 HP X 746 Watts = 3,730 Watts or 3.73 kW. As the output mechanical energy is the result of the motor performing at 80% efficiency, the power consumed by the 5 HP motor will be 3.73 kW X 100 ÷ 80= 4.66 kW.

How much is a car motor?

New engines start at around $4,000 for a 4-cylinder, around $5,500 for a V6 and $7,000 for a V8.