What is the difference between 24V brushed and brushless motors?

[CeciliaDella]

The differences between brushed and brushless motors: 1. Brushed motor: It uses carbon brushes as the two power contacts of the motor, controlled by a speed-regulating handle and controller, achieving stepless speed regulation for electric bicycles from 0-20 km/h through secondary gear reduction and an overrunning clutch. Currently, this type of brushed high-speed motor has high gold content, strong gear strength, good wear resistance, and reasonable design, resulting in a low repair rate. Moreover, the cost of repairing and replacing gears and the motor is relatively low, effectively reducing the maintenance costs of electric bicycles. Additionally, brushed motors can easily achieve human-powered riding through an overrunning clutch and flywheel. Brushed motors use mechanical commutation via brushes! 2. Brushless motor: The cost of its speed control system is higher than that of brushed high-speed motors, and the controller is prone to failure during use. Electric bicycles equipped with brushless motors must reach speeds of 35 km/h or more to achieve their optimal working efficiency. However, since electric bicycles are managed as non-motor vehicles with a speed limit of 20 km/h or below, brushless motors are not highly practical for electric bicycles as they reduce working efficiency. Currently, their main advantage is low noise. Brushless motors use electronic circuits for commutation! They have detection components to detect polarity!

[GiselleMarie]

When it comes to the difference between 24V brushed and brushless motors, I've used many power tools and found the key lies in the brush design. Brushed motors rely on brushes and commutators to operate, with a simple and cheap structure, but the brushes wear easily, produce more sparks, have a shorter lifespan, and often require maintenance. Brushless motors, on the other hand, eliminate brushes and use electronic controllers for commutation, offering longer lifespan, higher efficiency, quiet operation, and maintenance-free performance. Taking a car example, if a window lift motor uses a brushed design, it might jam after rain; brushless ones operate much more smoothly. The 24V voltage doesn't make much difference—it's all about the design. Overall, I prefer brushless motors for their hassle-free operation, making them ideal for frequent use. Installation is a bit more complex for brushless motors, but they pay off in the long run.

[Alyssa]

From a technical perspective, the core difference between 24V brushed and brushless motors lies in the commutation method. Brushed motors have internal brushes that rub against the rotor, causing significant energy loss with efficiency as low as 60-70%, and the brushes wear out quickly requiring frequent replacement. Brushless motors use external controllers with sensors to switch current, achieving efficiency up to 90%, with much less friction and several times longer lifespan. The 24V voltage allows both types to achieve high power, but brushless motors have more obvious advantages. For automotive components like fan motors, brushless versions are quieter, more energy-efficient, and reduce overheating risks. In daily use, maintenance is troublesome for brushed motors, while brushless ones are virtually maintenance-free. I recommend choosing brushless for better performance, and brushed for temporary low-cost applications where simplicity is preferred.

[Jesse]

From a budget perspective, 24V brushed motors have lower initial costs, making them cost-effective to purchase. However, frequent brush wear leads to high replacement and maintenance expenses, making the total cost not necessarily cheaper. Brushless motors are more expensive upfront but have longer lifespans and require less maintenance, saving hassle. For automotive applications like wipers or AC fans, brushless motors prevent stalling and avoid breakdowns. I've seen friends using brushed motors spend more on annual repairs than the price of a new brushless motor. If you don't frequently use 24V equipment, brushed motors suffice; for regular use, brushless motors are more economical. Voltage levels don't change this comparison—it mainly depends on usage frequency.