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      • AC Basics
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      • Reactive Power
      • Complex and apparent Power
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  • Machines
    • Transformers
      • Transformer Action
      • Ideal Transformer
      • EMF equation
      • Equivalent circuit and Phasor diagram
      • Voltage regulation
      • Parts of a transformer
      • Transformer tresting
      • Load losses and No-load losses
      • Types
        • Core type and shell type transformers
      • Magnetization current
      • Magnetization inrush
      • High Leg delta connection
      • Buchholz relay
      • Autotransformer
      • Selection
        • Frequently asked questions-1
        • Frequently asked questions-2
        • Frequently asked questions-3
      • Transformer noise
      • Transformer kVA calculator
      • Transformer turns ratio
  • Power system
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  • Q&A
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Motor locked rotor current calculator

What is 'locked rotor current'? A motor at rest acts as if its rotor is locked. The locked rotor current and the starting current of a motor are one and…

Continue ReadingMotor locked rotor current calculator

Simple motor rated current calculator with calculation steps

Motor rated current also known as full load amperes (FLA) of a motor is the maximum current the motor windings are designed to carry. Here is a simple motor rated…

Continue ReadingSimple motor rated current calculator with calculation steps

Induction motor slip calculator

The speed of an induction motor is always lesser than its synchronous speed. The difference between the actual speed and the synchronous speed of a motor is known as slip.…

Continue ReadingInduction motor slip calculator

Number of poles calculator

Most of the time, the motor nameplates do not contain the number of poles data on them. The number of poles in a motor can be calculated from its synchronous…

Continue ReadingNumber of poles calculator

Synchronous speed calculator

The "synchronous speed" is the speed of the rotating magnetic field in an electric motor. Here is a simple synchronous speed calculator. Always remember that the synchronous speed and rated…

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Motor torque calculator | Full load torque of a motor

The full load torque of a motor is the maximum torque that the motor can deliver when it is fully loaded. Here is a simple motor torque calculator that can…

Continue ReadingMotor torque calculator | Full load torque of a motor

Motor FLC calculator | Motor Full load current calculator

Motor FLC or full load current or full load amperes (FLA) of a motor is the maximum current the motor windings are designed to carry. Here is a simple motor…

Continue ReadingMotor FLC calculator | Motor Full load current calculator

Star-Delta starter design tool | Wye-Delta starter design tool

Star-delta starters are widely used for starting three-phase induction motors. It can reduce current inrush to 1/3 of direct-on-line starting current. Here is an advanced Star-Delta starter design tool that…

Continue ReadingStar-Delta starter design tool | Wye-Delta starter design tool

Direct-on-line starter | DOL starter selection tool

The direct-on-line starter is the cheapest motor starting method. In this method, full voltage is applied to the motor terminals. Here a comprehensive DOL starter selection tool, which can help…

Continue ReadingDirect-on-line starter | DOL starter selection tool

Resistor color code calculator

Resistors are the basic building blocks of a circuit. They are used in circuits as voltage dividers, current limits, termination for communication links, etc. It is important to know how…

Continue ReadingResistor color code calculator
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