Owing to their exceptionally high speed and power, blenders have created interest and questions as to how they work. Except for the speed and power of their blades it is not at all difficult to understand how a blender motor works. Especially if you take it one step at a time.
As is typical with most electric motors, a blender motor generates heat as it produces power. This heat is not functional and does not contribute to positively to the operation of the blender. It is produced naturally by the revolution of a shaft and magnets inside an electric coil, the same shaft that turns the blender's blades. And although this movement of the shaft produces heat, it also draws air into the motor parts where cooling takes place.
Avoiding Heat Damage to the Blender's Motor
Like other smaller air cooled motors, the blender is not designed for sustained high speeds. If a blender runs at high speeds too long this sustained speed can heat the motor faster than incoming air can cool it. Consequently, the blender can shut itself down, temporarily. In some cases, this heat can damage the blender's motor. To avoid this potential damage, you should regulate the speed of the blender so that these speeds are produces in short bursts, rather than sustained higher speeds.
Knowing Your Blender's Power Rating
An optional method for avoiding potential heat damage is to know more about maximum power your blender can produce. The greater the power, the less chance there is of damage from excessive heat generated by the blender's motor. Smaller, less powerful blender motors are rated at 450 watts, while more powerful motors are rated at 750 watts or higher. Knowing what the blender will be used for and what its power rating is will help you better forcast how careful you'll need to be in running your blender at higher sustained speeds.
Knowing Your Blender's Potential Usage
Why is it important to know what your blender will be used for? Speed kills. Some uses of a blender may require higher power and therefore greater heat. While some blenders may be limited to only 3 or 4 speed settings, other high-speed blenders provide for as many as 15 or more. Typically, these higher-speed blenders will have larger, more powerful motors. But, assuming these blenders naturally can produce more power without producing more heat can be risky. You should check their power output before buying a blender and before operating it at higher sustained speeds.
Operating Your Blender
A common blender characteristic is the whirlpool—or vortex—effect created by spinning blades that cause liquid in the container to also spin. This vortex is intended to pull solids down into the center of the whirling fluids where they can be liquified and mixed. Some blenders—or some blade speeds—fail to completely pulverize solids in the vortex. Instead, they build up, remaining at the center of the vortex and demanding more power from the blender. When this happens, you can encourage more uniform mixing by varying your mixer speeds and creating a sort of pulsing of power.