A DC blower is powered by a fixed value potential (eg battery voltage). In contrast, an AC blower is powered by a varying voltage that is equal in positive and negative. Typically, this varying voltage has a sinusoidal shape. Commonly used values for this sinusoidal voltage may vary in magnitude and frequency throughout the world.
In the past, large AC fans were generally less expensive than large DC fans. Today, however, their price difference is negligible due to their return advantage. We will try to point out the differences between the above fan types to help you choose and purchase the correct fan type for your application.
Power supply
DC blowers, or direct current blowers, use direct current (DC) to power the motor. DC current is a type of electrical current that flows in only one direction. It is commonly used in electronic devices and systems that require precise control of the amount of current flowing through them, such as in battery-powered devices or in control systems.
AC blowers, or alternating current blowers, use alternating current (AC) to power the motor. AC current is a type of electrical current that periodically reverses direction. It is the type of current that is used in most household and industrial electrical systems.
Construction and structure
In terms of construction and operation, DC blowers and AC blowers are similar. Both types of blowers consist of an electric motor that is connected to a fan or impeller, which generates airflow when it rotates. The motor is powered by electrical current, which causes it to rotate and drive the fan.
Control method
One key difference between DC and AC blowers is the way that they are controlled. DC blowers can be easily controlled using a simple on/off switch, since the current flow in a DC circuit can be easily stopped and started. AC blowers, on the other hand, require more sophisticated control systems to regulate the amount of current flowing through the motor. This is because the direction of the current in an AC circuit is constantly changing, making it more difficult to control.
Application
In terms of applications, DC blowers are commonly used in electronic devices and systems that require precise control of the airflow, such as in computer servers and telecom equipment. They are also used in portable air conditioning units and other small appliances. AC blowers, on The other hand, are used in a wide range of applications, including in air conditioning and heating systems, industrial machinery, and ventilation systems.
Power
DC blowers tend to be more efficient than AC blowers, as they can be designed to operate at a specific speed and power output, which reduces energy losses and improves efficiency.
AC blowers, on the other hand, are less efficient, as the current flowing through them can vary in strength and frequency, which can lead to energy losses.
Electromagnetic Interference (EMI)
DC blowers emit less electromagnetic interference (EMI) than AC blowers, as the current flowing through them is constant and does not fluctuate.
AC blowers, on the other hand, can generate more EMI, as the current flowing through them periodically changes direction.
Sound
DC blowers tend to produce less noise than AC blowers, as the motor does not have to switch direction as it rotates.
AC blowers, on the other hand, can produce more noise, as the motor has to switch direction periodically.
Voltage
DC blowers can operate on a wide range of voltage levels, as the current flowing through them is constant and does not fluctuate.
AC blowers, on the other hand, typically require a specific voltage level to operate properly, as the current flowing through them periodically changes direction.
Water resistance
Both DC and AC blowers can be designed to be water resistant, but DC blowers may be more resistant to water damage due to their simpler construction.
Durability
Both DC and AC blowers can be durable, but DC blowers may be more reliable due to their simpler construction and the fact that they do not have to switch direction as they rotate.
Controllability
DC blowers can be easily controlled using a simple on/off switch, since the current flow in a DC circuit can be easily stopped and started.
AC blowers, on the other hand, require more sophisticated control systems to regulate the amount of current flowing through the motor. This is because the direction of the current in an AC circuit is constantly changing, making it more difficult to control.
Price
The price of DC and AC blowers can vary depending on the size and performance of the motor, as well as the materials used in its construction. In general, DC blowers may be more expensive than AC blowers due to their higher efficiency and more precise control.
It's important to note that these are generalizations and that the specific characteristics of a particular DC or AC blower may vary. It's always a good idea to carefully consider the specific requirements of your application before choosing a blower.
