The working engine from an old washing machine is always useful in the household. If it is connected correctly, it can be used as a driving force for a grinder, lawn mower, juicer. Therefore, do not rush to throw away the old equipment, it will still serve you.
You will learn what types of motors are and how to properly connect them to the devices.
Types of motors SMA
According to the type of design, the engines of washing machines are divided into three types:
- Asynchronous. It consists of a stator and a rotor, works due to the magnetic field, which is formed during rotation. The advantages of this type are the simplicity of design, which makes it easy to replace worn parts, as well as silent operation. The disadvantages include low efficiency and large sizes.
- Collector. Belongs to a more modern type. The design includes electric brushes that, in contact with the rotor of the motor, transmit electric energy to it. Small size and high power are the main advantages of the collector motor. However, due to constant friction, brushes and collector wear out quickly.
- Invertor. The non-power motor is attached directly to the drum of the washing machine. It also consists of a stator and a rotor, but it is more compact. Powerful motor runs silently. The only drawback is the high cost of machines that are equipped with an inverter motor.
As part of the article, we will talk about connecting the engine from old washers that were equipped with asynchronous electric motors. You can also connect the motor to the new washing machine if it is out of order.
Dismantling an induction motor
To remove the motor, remove the back of the washer by unscrewing the screws around the perimeter. With the panel aside, locate the motor at the bottom under the tank. Disconnect the wiring and unscrew the bolts on which the device is mounted. Having pulled the engine out of the machine body, you can proceed to connect it.
Proper DIY connection
Connecting an old type motor is somewhat more difficult. Since in the collector type you can navigate by the color of the wires, and in the asynchronous one you will have to ring out each output.
Armed with a multimeter, alternately ring each wire to search for a starting winding. You need to find paired wires that show the same resistance. Record all indicators, in the future they will need to be compared.
By ringing both windings and writing down the indicators, compare them. The working winding (OV), the resistance will be less than the starting (ON). It is not recommended to connect this motor through a capacitor, as it can damage the motor.
- Secure the starter winding wire with the working wire.
- Connect them to the AC power as shown in the diagram.
- One starting wire must be hooked to the start button, the contact of which is not fixed. In the diagram, it is indicated by the letters SB.
If starting the engine, you find that it rotates in the wrong direction, swap the wires from the starting winding, then it will rotate in the opposite direction.
Why the motor heats up when turned on
It is recommended that before connecting the motor and giving it a second life, check all its details. So, if the bearing becomes unusable or clogged with dirt, this leads to friction between the rotor and the stator.
If you decide to connect the motor through a capacitor, most likely its capacity is too large. Therefore, it is better to make the connection without a capacitor, as this can lead to the combustion of the motor.