Mixer Grinder Connection, Wiring, Internal Circuit Diagram

In this article, we are going to see an electrical mixer grinder connection diagram, wiring, and internal circuit diagram. A mixer grinder is a very well-known and useful kitchen appliance. Nowadays, almost every house has a mixer grinder. If you have basic knowledge about electrical engineering and have certified to do electrical work, then you must know about the mixer grinder working principle and its internal circuitry. So you can easily repair a mixer grinder and earn money without doing any professional job.

What is Mixer Grinder? Internal Parts

A mixer grinder is a compact portable electrical machine that is used for mixing and grinding grains.

Generally, the mixer grinder is designed to operate with a 230V AC supply. The internal parts of a mixer grinder as below,

• Universal Series Motor
• Three Position Speed Control Rotary Switch
• Thermal Overload Relay or overload switch
• Indicator Light
• Power Switch

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Mixer Grinder Internal Circuit Diagram

Here, you can see the internal circuit diagram of the mixer grinder below. You can see how all internal components are connected.

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Universal Series Motor

Universal series motors are those which are designed to operate with both AC and DC supply.

Here the word 'series' used because its field windings are connected in series with the armature winding.

In the above circuit diagram, you can also see there are two series windings. One of these is tapped in three positions. And those tappings are connected to the speed control switch. So this arrangement is for speed control of the motor. So we can obtain three different speeds(low, medium, high) by rotating the switch. Also, you can see the mixer grinder motor connection below.

Thermal Overload Relay or overload switch

A thermal Overload Relay or overload switch is used to protect the device from overload or overcurrent fault. If the motor draws overcurrent due to any internal fault, or improper use, the overload relay will automatically disconnect the power supply to the motor. As the mixer grinder is a home appliance, so the thermal overload relay is very helpful to prevent accidents such as burning of motor, fire, and melting due to over current. The overload switch also helps to turn off the motor if you run it for a long time. After fully cool down it will be got automatically turned on. You can see the mixer grinder overload switch connection diagram below.

Three-Position Rotary Switch

It has a total of four terminals. The first one is the input terminal and the other three are output terminals where the terminals of the motor are to be connected. You can see the mixer grinder rotary switch connection diagram below.

Power Switch

Most of the mixer grinders have the function to switch on and off in their speed control switch but some mixer grinders come with a separate power switch to on and off.

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Mixer Grinder Connection Diagram

Here, you can see the connection diagram of the Mixer Grinder below.

So, here you can see there is a total of five terminals of the motor. The red, yellow, and blue are connected to the speed control switch. Rest, two terminals are neutral and ground. The thermal overload relay is connected in series with the speed control switch. The indicator light is connected across the phase and neutral. So when the power supply is available, it will glow.

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