Cooling Blowers for DC Motors

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DC motors are those that run on DC electricity, also known as direct current. They were invented with the goal of getting rid of internal combustion engines like those that run on steam. Some DC motors, like those found in electric cars, operate with the use of batteries that can be recharged. These motors can be found in numerous things we use on a daily basis, from a child's toy to the disc drive in a computer.

What are Cooling Blowers?

One of the most important components of a DC motor is the cooling blower. Most people notice when a motor stops working, but few realize that sometimes the motor has stopped because there is something wrong with the blower. Blowers are necessary in the case of motors that give off a lot of heat. If the blower quits working properly, then the motors will overheat and stop functioning.

There are numerous different kinds of blowers that are commonly used with DC motors. They are available in various sizes and shapes. You will also find a wide range of voltages and other features like weather resistance. The same blower isn't appropriate for every motor, so this is why there are so many options available. Before replacing a blower on any motor, it is critical that you read the manual to find out what the replacement part should be. If you put the wrong blower in, the entire motor could be severely damaged.

Why Do DC Motors Need Blowers?

As already mentioned, DC motors tend to give off a lot of heat, so it is essential that they be kept cool in order to ensure proper functioning. Certain components inside the motor give off more heat than others. It all depends on the type of motor you are trying to cool and how much heat is being generated inside of it. In general, having a blower on your motor can make it last a lot longer.

Kinds of Cooling Blowers

Some people tend to use the term “fan” interchangeably with “blower,” but that's just not the case. Fans are actually low pressure air pumps that blow air parallel to the axis of the blade at a very high flow rate, although they work against low pressure. On the other hand, blowers push the air perpendicularly to the axis of the blower with a low rate of flow but up against high pressure.

In general, blowers provide the necessary cooling power through either internal or external installation, depending on the motor. Most blowers are centrifugal, having separate forward and backward curved wheels. They may have any one of a number of housings, including heavy duty aluminum or a housing that's rated for continuous duty.

What to Look for in a Blower

When trying to decide which blower will be right for your motor, here are some things you should look for:

  • Size and shape of the motor

  • A construction that is resistant to sparks so that the risk of fire is reduced.

  • Heavy duty steel impellers

  • Adaptor plates so that the blower can be easily adapted to your motor.

Of course there are more factors that should also be taken into consideration when choosing a blower for your DC motor, but these for factors are the most basic ones that will get you started on the selection process.

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