Takeaways – FAQs About Motor Electricity ConsumptionĪs a takeaway, we’ve answered the most common questions on the topic.
Power consumption full#
Last but not least, don’t forget that energy = time x power, so the running time of the motor has to also be taken into account.įor your convenience, we’ve compiled the most common power consumption figures of electric motors at full load into this chart: Motor HP A motor’s efficiency tends to decrease dramatically below about 50% load.”Īssume a 1 HP motor operates at 75 % of full load, the input power would be calculated as follows: Thus, a 10-horsepower (hp) motor has an acceptable load range of 5 to 10 hp peak efficiency is at 7.5 hp. Maximum efficiency is usually near 75% of rated load. “Most electric motors are designed to run at 50% to 100% of rated load. Instead, they typically run somewhere between 50-99% of their peak performance.Īccording to, most of these engines are designed to provide their best performance at about 75% of their rated load. Let’s face it electric motors rarely operate at their fully rated load. Unfortunately, no hard number can be universally used for efficiency since efficiency varies from one model to the next.īesides efficiency, the load is no less important. This means that a fully loaded 1 HP electric motor would consume anywhere from 0.746/0.7 – 0.746/0.9 kW, which translates to 0.829 – 1.066 kW per hour. And depending on the make and model, the efficiency of those units varies widely.Īre you wondering what the typical efficiency is of an electric motor?Īs a rule of thumb, the estimated efficiency of many electric engines falls into the range of 70% – 90%. The general rule is that 1 electrical HP = 0.746 kW therefore, a one HP electric motor would (theoretically) consume 0.746 kW per hour.įirst, each electric engine has its own efficiency factor, which has to be taken into account. There’s no question that the main factor affecting power consumption is engine performance. The power consumption of an electric motor depends on many factors, including:
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