The main difference between a brushless water pump and a brushed water pump is their structure, which results in differences in lifespan, price, and usage. Brushed water pumps have carbon brushes that wear out during use, resulting in a short lifespan and low price. Brushless water pumps do not have carbon brushes, have a relatively long lifespan, and are relatively expensive. In terms of driving methods, although both brushless water pumps and brushed water pumps are electric water pumps, brushless DC water pumps are driven by brushless DC motors, while brushed water pumps are driven by brushed motors.

The working principle is different:

Brushed water pump

There is a brush water pump, and its motor is equipped with carbon brushes inside. The carbon brush is in contact with the commutator (also known as the commutator), and the direction of the current is changed through the contact between the carbon brush and the commutator, thereby achieving the rotation of the motor. This design causes electric sparks to be generated during the operation of the brushed water pump, which is due to the friction between the carbon brush and the commutator.

Brushless water pump

Brushless water pumps use electronic commutators instead of traditional mechanical commutators. It controls the direction of the motor's current through an electronic controller, thereby achieving the rotation of the motor. This design eliminates the physical contact between the carbon brush and the commutator, so no electric sparks are generated and the operation is smoother.

Compared with brushed water pumps, brushless DC water pumps have the following advantages:

1. The pump shaft has been changed from a dynamic seal to a closed static seal, completely avoiding medium leakage. It can be used for water and underground, completely waterproof. The stator and rotor of the magnetic isolation water pump are completely isolated, and the stator and circuit board are sealed with epoxy resin, which has high waterproofness.

2. Low power consumption, high efficiency, no need for independent lubrication and cooling water, reducing energy consumption.

3. The brushless DC water pump adopts electronic component commutation instead of carbon brush commutation. The rotor part adopts permanent magnets, and the water pump body adopts environmentally friendly materials. Adopting high-performance wear-resistant precision steel shafts and shaft sleeves. The shaft sleeve is combined with the rotor through injection molding, avoiding wear and greatly improving the service life of the brushless DC magnetic pump.

4. It has the function of damping and reducing the impact of motor vibration on the pump, as well as the impact of cavitation vibration on the motor.

5. The noise level can be below 35dB.

6. The required parameters can be adjusted through the stator winding and can operate under a wide voltage range.

When overloaded, the rotor will slip on the ceramic shaft, which will protect the motor and pump.

Differences in application fields

Brushed water pump

Brushed water pumps, due to their low cost, are usually used in situations where performance requirements are not high, such as home gardening, small aquariums, etc.

Brushless water pump

Due to its high efficiency and low noise, brushless water pumps are more suitable for applications that require long-term operation and high requirements for noise and efficiency, such as automotive cooling systems, computer room cooling systems, industrial cooling systems, household appliance circulation boosting, etc.

summary

Brushless DC water pumps and brushed water pumps each have their own advantages and applicable scenarios. Brushless water pumps have advantages in many high-end applications due to their high efficiency, low noise, and low maintenance costs, while brushed water pumps still have a market in some simple applications due to their low cost. When choosing a water pump, users should determine the most suitable type based on their own needs and budget. With the advancement of technology, the cost of brushless water pumps is gradually decreasing, and it is expected that their application scope will further expand.