BLDC brushless motors do not have brushes, but a commutator rotor as well. This allows to achieve maximum performance of the motor while limiting the dimensions. This translates into very high operating reliability, much better than that of conventional DC motors. Brushless BLDC motors are used in very different projects. They are used in remote-controlled vehicles and children's toys. Furthermore, they are used in hybrid and electric vehicles as well as in handheld power tools. BLDC brushless motors also work very well in cooling systems of computer components and household appliances. Brushless BLDC motors are powered by DC, but their principle of operation and design are more like permanent magnet synchronous motors. We offer BLDC brushless motors, which you will certainly use in many, more and less technologically advanced electronic projects.
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BLDC motors
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Brushless Motor with Gear 25Dx43L 45:1 with PWM driver + encoder
Brushless motor with 45:1, 159 rpm, 2.4 kg*cm (0.23 Nm) gearing. The device has a built-in controller with PWM and DIR input, so no additional controller is required. The...
Index: DFR-05188
Index: DFR-05188
How do brushless motors work?
Despite being powered by direct voltage, BLDC brushless motors ' design and operating principle refer to permanent magnet synchronous motors (PMSM), which, unlike BLDC motors, are powered by alternating voltage. The basic elements of a BLDC motor are the stator and the rotor.
The stator is a stationary element and has wound windings (usually 3 to 5), powered by an external voltage source. However, the rotor is not wound and is made of permanent magnets.
The principle of operation is based on the interaction of the stator's magnetic field with the rotor's magnetic field, and continuous rotation of the rotor is ensured by the use of an electronic commutator based on transistors controlled by a PWM signal, the pulse width of which is adjusted based on information from the Hall sensor regarding the angular position of the shaft. engine - in this solution, the voltage is turned on and off in the stator windings one by one.
Among the designs of BLDC motors, due to the location of the rotor in relation to the stator, there are motors with a rotor located inside the stator, where it is easy to obtain high torque with very efficient heat dissipation, and motors with a rotor surrounding the stator, which are used in applications with low energy consumption, where no high torque required.
BLDC motor - motors with many advantages
One of the greatest advantages of BLDC motors is high efficiency while maintaining small dimensions. Thanks to their efficiency, they are widely used.
In comparison, a conventional brushed motor would require larger components to provide the same amount of power on the shaft, which would be impractical and more expensive.
Brushless DC motors - other advantages
The second great advantage of BLDC motors is simple control of the motor operation by using the feedback phenomenon, thanks to which the rotational speed and torque on the motor shaft can be quickly and precisely set, even in the highest torque range.
In a brushless motor, this control method also positively translates into saving energy from the supply voltage source and reduces thermal losses, and in the case of wireless devices - extends battery life. The design of BLDC motors is characterized by high durability, low noise level and no sparking due to the lack of brushes - in the case of conventional DC motors, the brushes wear out as a result of their continuous physical contact with the commutator.
BLDC - versatile brushless motors for many applications
Simple control, long service life and high efficiency while maintaining low energy consumption are the main advantages of BLDC motors, thanks to which they can be successfully used in applications where long-term continuous operation is required. Brushless DC motors are often found in devices such as washing machines, ventilation and air conditioning installations, electronics, as well as toys and remotely controlled vehicles, including robots and drones.
In personal computers, BLDC motors drive cooling fan blades and hard drives. The Redox brushless motors offered by the Botland store are available in various power variants and will certainly prove useful in various modeling applications. We encourage you to check out the remaining assortment of the engines category. You can find there, among others: stepper , linear and vibration motors.
Brushless BLDC motors - FAQ
BLDC is an English abbreviation describing a type of electric motor: brushless direct- current motor. The mechanical commutator with brushes is replaced by an electrically controlled commutator, the coils are stationary and the magnets are located on the rotor.
In mechanics and industry, brushless motors are used in motion control, positioning and actuation systems. Brushless motors are suitable for manufacturing applications due to their high power, good speed-torque characteristics, high efficiency, wide speed range and low maintenance costs.
You can check the windings of a brushless motor by measuring the currents drawn by the phases under constant load. You need to know the nominal currents for a given load. A clamp-on ammeter will be useful to perform the measurements.