Automation Engineering

VFD Sizing Tool

Calculate vfd sizing tool given relevant engineering parameters.

Quick Answer

The vfd sizing tool computes current calculation, motor power calculation from the input values you provide.

Calculator

Current Calculation
—
Motor Power Calculation
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Result Interpretation

VFD Sizing Tool computes Current Calculation and Motor Power Calculation using the defined engineering formula and the input values provided.

Worked Example

Verified calculation

Given:

  • Voltage = 400
  • Flow Rate = 100
  • Head = 10
  • Density of Fluid = 1000
  • Efficiency = 75
  • Power Factor = 0.85

Expected Result:

  • Current Calculation = 0.16981388398315
  • Motor Power Calculation = 85

Engineering Interpretation:

Under the given input conditions, the calculated result is: Current Calculation = 0.16981388398315; Motor Power Calculation = 85.

The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.

Formula / Method

current calculation = (flow rate / ((1.732 * voltage) * power factor)); motor power calculation = (((head * density of fluid) / 1000) + efficiency)

Current Calculation; Motor Power Calculation.

Variables

SymbolLabelRoleDescription
voltage Voltage INPUT Voltage
flow_rate Flow Rate INPUT Flow Rate
head Head INPUT Head
density Density of Fluid INPUT Density of Fluid
efficiency Efficiency INPUT Efficiency
power_factor Power Factor INPUT Power Factor
out_current_calculation Current Calculation OUTPUT Current Calculation
out_motor_power_calculation Motor Power Calculation OUTPUT Motor Power Calculation

Calculation Steps

  1. Enter the voltage in V.
  2. Enter the flow rate in m³/h.
  3. Enter the head in m.
  4. Enter the density of fluid in kg/m³.
  5. Enter the efficiency in %.
  6. Enter the power factor.
  7. Step 1: Compute current calculation.
  8. Step 2: Compute motor power calculation.
  9. Read the current calculation from the results.
  10. Read the motor power calculation from the results.

Frequently Asked Questions

What does this calculator calculate?

The VFD Sizing Tool estimates Current Calculation, Motor Power Calculation based on the input parameters you provide

Why is voltage important in this calculation?

voltage is directly proportional to current calculation. When you enter voltage in V, the calculator uses it in the engineering formula to compute the output

How should I interpret the result current calculation?

The calculator outputs current calculation. The result is computed directly from the input values using the defined engineering formula

What units should I use for the inputs?

Enter each value in the units shown next to the input field: Voltage (V), Flow Rate (m³/h), Head (m), Density of Fluid (kg/m³), Efficiency (%). Make sure all inputs use the specified units for consistent results

What assumptions does this calculator use?

This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment

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