What are the differences between brushless DC motors and stepper motors

The difference between a DC brushless motor and a stepper motor. A stepper motor is a stepper motor with an open-loop control element that converts electrical pulse signals into angular displacement or linear displacement. Pinzhi takes you to understand the difference between brushless DC motors and stepper motors.

      In the case of non-overload, the speed and stop position of the motor only depend on the frequency and number of pulses of the pulse signal, and are not affected by load changes. A brushless DC motor is a high-performance motor. It is characterized by the external characteristics of a DC motor without the mechanical contact structure consisting of brushes. It adopts permanent magnet rotor, no excitation loss and no heating armature winding. It is also mounted on the outer stator for easy heat dissipation.

      The difference between the two is as follows:

      1. Different control precision

      According to different driving principles, brushless DC motors are generally used in places with low control accuracy, and stepper motors are used in places with relatively high control accuracy.

      2. Different driving principles

      The driving principles of brushless DC motors and stepper motors are different. The brushless DC motor is controlled by the alternating current provided by the Hall element positioning. Stepper motors are directly driven by a single-pulse voltage and do not require Hall element positioning. The rotation angle can be precisely positioned by controlling the number of pulses applied to the motor;

     3. The speed is different

      The brushless DC motor has a higher speed than the stepper motor;

      Scope of application of brushless DC motor:

      Electric vehicles, home appliances, medical equipment, automobiles, industrial equipment

      Key trends in the motor drive market:

     The trend in motor drive and control is towards brushless DC (BLDC) motors and the controllers that drive them. Allegro's highly integrated motor driver ICs include sine wave drivers and vector-based algorithms to provide a high level of customization without complex software programming and resource allocation. The programmable sensorless BLDC motor driver includes a simple GUI for programming all motor control functions, including sensorless startup, constants for closed loop current/speed control, fault actions, and diagnostic reporting.