 # Quick Answer: How Do You Size An Electric Motor For A Pump?

## How do I choose a pump size?

Pump sizing can be accomplished in six steps, as follows:Find the total dynamic head, which is a function of the four key components of a pumping system, such as the one shown in Figure 1.Correct for the viscosity of the fluid being pumped, since pump charts and data are given for water with a viscosity of 1 cP.More items…•Jan 1, 2018.

## Which motor is used for centrifugal pump?

induction motorWhat Does a Centrifugal Pump Look Like? Centrifugal pumps come in many shapes, colours and sizes but they typically look something like this. The pumps consist of two main parts, the pump and the motor. The motor is an electrical induction motor which allows us to convert electrical energy into mechanical energy.

## How do you calculate the power of a servo motor?

The power in any motor can be calculated as the sum of each phase power (product of RMS current and RMS voltage). In the case of a phase-balanced motor: In a Y-connected motor, The phase current (Iph) is the current in RMS seen at the Servo Drive output terminals.

## How do you determine torque of a motor?

The required torque is calculated by multiplying the sum of load torque and acceleration torque by the safety factor. When the required torque for the motor varies over time, determine if the motor can be used by calculating the effective load torque.

## How can you tell how much weight a motor can move?

The formula that relates mass, force and acceleration is: F = m*a , where F is the force, m is the mass and a is the acceleration. So a = F/m would be 14.715 kg*m/s² divided by 2 kg and therefore: ~7.358 m/s².

## What size pump do I need to lift water 20 feet?

Example – Horsepower Required to Pump WaterPower Required to Pump Water (hp)Volume Flow (gpm)Height (ft)100.01260.0505150.01890.0758200.02530.10113 more rows

## How many gallons per minute does a 1 hp pump?

One horsepower equals 3,960 gallons/minute/feet.

## Which motor is suitable for centrifugal pumps?

induction motorThe typical induction motor reaches its maximum efficiency between 65 and 85 per cent load, and efficiency remains relatively flat between 55 and 90 per cent.

## How do I select a motor for an application?

5 steps to choose the best motor for your applicationStep 1: Know the load characteristics. … Step 2: Get a handle on horsepower. … Step 3: Getting started. … Step 4: Adjust for duty cycle. … Step 5: The last consideration, motor hypoxia.Dec 3, 2011

## How do you size a motor?

Most of the motors available likely are capable of much higher speeds than required. Divide the motor speed by the required speed and round down to get a starting gear ratio. Then divide the required torque by the gear ratio to find the newly required torque.

## How do I calculate pump needs?

Quick FormulaWater horsepower = minimum power required to run water pump.TDH = Total Dynamic Head = Vertical distance liquid travels (in feet) + friction loss from pipe.Q = flow rate of liquid in gallons per minute.SG = specific gravity of liquid (this equals 1 if you are pumping water)Water horsepower =More items…

## How far can a 1 hp pump push water?

We know (by definition) that 1/2 horsepower can raise 16500 lbs. of water (1978 gallons) 1 foot in one minute. Therefor, it could raise 1 gallon to 1978 feet in one minute or 1 qt. could be raised to 7912 feet in 1 minute.

## How do you size a pump motor?

Pump Hydraulic Power (ph) = (D x Q x H x9. Pump Hydraulic Power (ph) = (1000 x 0.005 x 65 x9. 87)/1000 =3KW. Motor/ Pump Shaft Power (ps)= ph / pe = 3 / 80% = 4KW. Required Motor Size: ps / me =4 / 90% = 4.5 KW.

## How do I choose a pump motor?

The power required to drive the pump at the rated design condition should always be less than the nameplate horsepower rating of the motor. So if the pump will require 4.5 HP at the design condition, at a minimum, the motor should be sized for 5 HP – the next nominal size above 4.5 HP.