Simple 3-Phase Motor Control Circuit:

This diagram shows how to make a Simple 3 Phase Motor Control Circuit. In this circuit, we use the 3-ampere meter, a stop switch, a start switch, a magnetic contactor with overload, a three-ct coil, and a 3-phase motor. This circuit is very simple and easy to make. If you want to know more about this circuit please stay check our youtube video for clear details.


Diagram of Simple 3 Phase Motor Control Circuit:

Simple 3 Phase Motor Control Circuit

Components needed For this Project:

You can get the components from any of the sites below:

  1. 3 Phase Motor (5 HP) [See Buy Click Amazon]
  2. Single Phase Amperemeter [See Buy Click Amazon]
  3. Magnetic Contactor 40A [See Buy Click Amazon]
  4. Push Button NO Switch [See Buy Click Amazon]
  5. Push Button NC Switch [See Buy Click Amazon]

*Please note: These are affiliate links. I may make a commission if you buy the components through these links. I would appreciate your support in this way!

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Components used to make the Simple 3 Phase Motor Control Circuit:

01. 3 Phase Motor:

A 3-phase electric motor uses a 3-phase Power Supply to Convert Electric Energy into Mechanical Energy. It contains four Wires (Three hot Wires and one Neutral Wire) and Uses 3 Alternating Currents of the Same Frequency. Since it Generates a Rotating Magnetic Field, it does not need a Capacitor for the Startup. Some 3-phase Motors are Reversible, Which Means they can serve as Generators by Turning Mechanical Energy into Electrical Energy.

02. Ampere Meter:

Ammeter, an instrument, with the help of which the flow of electricity can be measured directly in Electrical units, amperes. It is a galvanometer with very low resistance. As a result, the entire current flows through the meter coil. Current is measured with an ammeter. So it can be said that the device that measures the flow of current in an ampere unit is an ammeter. Electric current is the flow of electrons whose unit is an ammeter. So it can be said that the device that measures the flow of current in an ampere unit is an ammeter. An ideal ammeter has no internal resistance. But in reality. the ammeter has little internal resistance. The range of the ammeter depends on this resistance.

03. Magnetic Contactor:

A magnetic contactor is an electromagnetic switching device. It is generally used for controlling 3-phase Motors. The operation of a magnetic contactor is similar to that of a Relay. but a relay is used for low-power or low-voltage connections, and a magnetic contactor is used for high-power or high-voltage connections. As soon as the supply is applied to the magnetic contactor coil. its normally open contacts are closed and normally closed contacts are opened and the associated devices are also operated. This is how a magnetic contactor works.

04. Start Switch:

NO (Normally Open) Terms Refer to a Type of Dry Contact or Wet Contact. A Push to Make Switch Allows Electricity to flow Between its 2 contacts when held in. When the button is released, the Circuit is broken. This type of Switch is also known as A Normally Open (NO) Switching system. As its name implies, a Normally Open (NO) Switch Contact or “a Contact” is a Switch. Put very simply, a Normally Open Sensor will have no Current When in a Normal State But When it Enters an Alarm State it will have +5V applied to the Circuit.

05. Stop Switch:

An NC (Normally Closed) Push Button is a Push Button That, In Its Default State, Makes Electrical Contact With The Circuit. An NC (Normally Closed) Push Button is a Push Button that, in its Default State, Makes electrical Contact With the Circuit. When The Button Is Pressed Down, The Switch no Longer Makes Electrical Contact And The Circuit is Now Open. When The Button is Not Pressed, Electricity Can Flow, But When it is Pressed The Circuit is Broken. This type Of Switch is Also known As a Normally Closed (NC) Switch.

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Frequently asked questions

What is a 3-phase motor circuit?

An electrical circuit that uses three current-carrying conductors, Line 1, Line 2, and Line 3, has a 120° phase shift in the voltage and current waveforms between them. The Power Circuit of three-phase motors is an example of a three-phase circuit.

What are the 3 types of 3-phase motors?

Three-phase AC motors could be divided into three general types, squirrel cage, wound rotor, or synchronous. Only the squirrel-cage rotor motors and the sound-rotor motors are induction motors. The rotor circuit diagram in an induction motor does not have an external power supply.

What is a control circuit diagram?

Also known as a ladder diagram. In contrast to the Power supply Circuit, the Control Circuit consists of inputs, in the form of switches, pushbuttons, or pilot devices, which activated, could either directly, or through a magnetic motor starter, energize a load.

Are all 3-phase motors AC or DC?

All DC motors are single-phase, but AC motors could be single-phase or three-phase. AC and DC motors use the same principle of using an armature winding or magnetic field except with DC motors, the armature rotates while the magnetic field does not rotate.

Are all 3-phase motors self-starting?

Three-phase induction motor is self-starting because winding displacement is 120 degrees for each phase or the supply also has 120 phase shift for the three-phase. It results in a unidirectional rotating magnetic field developed in the air gap which causes the three-phase induction motor to self-start.

Read more Single Phase Wiring


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