Views: 16 Author: Site Editor Publish Time: 2023-07-12 Origin: Site
A stepper motor is an electric motor whose main characteristic is that its shaft is rotated by steps, i.e. moved by a fixed number of degrees. This function is thanks to the internal structure of the motor and the exact angular position of the shaft can be known by simply counting the number of steps taken without the need for sensors. This feature also makes it suitable for a wide range of applications. Stepper motors can also be used in many fields, please consult us for detailed product information.
The best stepper motor will be capable of delivering your required torque while also being fast enough.I tell you my best picks depending on the category of the stepper motor:
A hybrid stepper motor is a special type of motor that works on the principle of a brushless DC motor. The motor moves in precise angles called steps by converting a series of electrical pulses into rotational motion. Unlike traditional DC or AC motors, a hybrid stepper motor does not generate continuous motion through a continuous input voltage, it remains in a specific position as long as the power is "on". Hybrid stepper motors are controlled using a signal of discrete electrical pulses, each pulse will rotate the motor shaft by a fixed angle, known as the step size.
HOLRY hybrid stepper motors have a variety of different step angles to choose from, including 0.45°, 0.9° and 1.8°. The motor usually consists of two parts, a stator and a rotor. The stator is a ring of electromagnets containing several phases (usually two or four), while the rotor is a shaft with magnets shaped to match the stator. When current passes through the coils in the stator, a magnetic field is created that interacts with the magnets of the rotor, causing the rotor to rotate a fixed step angle.
Controlling the rotation of a hybrid stepper motor is usually done by controlling the current, which can be done by controlling the voltage, usually with an electronic controller. The controller will send pulse signals to the motor as needed, and each pulse signal will cause the motor to rotate a fixed step angle. The step angle of a stepper motor is usually 0.9 degrees or 1.8 degrees, but other step angles are also available. Smaller step angles provide higher resolution and more precise control, but also require more pulse signals to complete a complete rotation. Larger step angles provide higher speed and torque at the expense of motor resolution and accuracy.
A hybrid stepper motor is a special type of motor consisting of a permanent magnet sandwiched between two rotor halves, which form the rotating part of the motor, placed in the stator housing. The stator coils make up the different motor phases, and the permanent magnets that cause the axial polarity interact with these to make the motor rotate. For example, a Lin hybrid stepper motor has two phases with four coils per phase. When this phase is magnetized, A-phase and A-phase (or B-phase and B-) are simultaneously magnetized, so both A-phases are magnetized to one magnetic pole, and both A-phases are magnetized to opposite magnetic poles, because The direction of winding phase A is opposite to the winding direction of phase A.
The motor's rotor is connected to the motor shaft, which outputs the motor's rotation and torque when voltage and current pulses are applied to the motor windings. Bearings on both sides of the rotor allow for smooth rotation with minimal friction and wear. The bearings are placed in the designated space of the front end cover and the rear end cover to ensure the concentricity of the rotor inside the stator. Perfect alignment of the rotor and stator is important because the air gap between them to generate the motor's torque must be equal on all sides and only a few nanometers wide, thinner than a strand of hair.
The special structure and working principle of hybrid stepper motors allow them to precisely control the movement of the motor. By controlling the current, the motor can rotate a fixed step angle, allowing very accurate position control. In addition, due to the discrete control nature of hybrid stepper motors, they can achieve position control without the need for sensors, which is a great advantage in many applications.
The different motor phases of a hybrid stepper motor contain different coils. These coils are usually wound around the stator, while the rotor has permanent magnets. When current passes through the coils in the stator, it creates a magnetic field that interacts with the permanent magnets of the rotor, causing the motor to rotate a fixed step angle. Different windings affect the performance and characteristics of the motor.
A common type of hybrid stepper motor is the two-phase stepper motor, where each phase contains two coils. These coils are labeled A-phase and A-phase, or B-phase and B-phase, respectively. When phase A is activated, it rotates the rotor by a fixed step angle, and when A-phase is activated, it rotates the rotor by the opposite step angle. Phases B and B-phase work in the same way as Phases A and A-phase.
Another hybrid stepper motor type is the four-phase stepper motor, where each phase contains four coils. These coils are usually labeled A-phase, A-phase, B-phase and B-phase. When phase A is activated, it rotates the rotor by a fixed step angle, and when A-phase is activated, it rotates the rotor by the opposite step angle. Phases B and B-phase work in the same way as Phases A and A-phase.
Hybrid stepper motors can also be classified according to the step angle. The step angle is the number of electrical pulses required for the motor to rotate a full step. Typically, the step angle can be 0.9 degrees or 1.8 degrees, but other step angles are also available. Smaller step angles provide higher resolution and more precise control, but require more pulse signals to complete a complete rotation. Larger step angles provide higher speed and torque at the expense of motor resolution and accuracy.
The operation of stepper motors is based on digital inputs, and their working principle allows precise motion control. Different models of stepper motor drivers have fixed step angles and can be used to control speed and position. In a stepper motor, electrical impulses are translated into precise and repeatable movements, dividing the entire rotation into smaller, equal parts. These partial rotations represent a set of angles that the stepper motor moves, allowing for more precise motion. This can result in a more controlled spin speed and spin direction.
The power supply feeds the stepper motor through the controller, which can be controlled using an open-loop or closed-loop system. Since most stepper motors are digital, their motion control positioning is very important for open-loop systems. As a result, stepper motors are capable of performing very precise rotational positions, making them ideal for applications requiring high-precision motion.
Stepper motors offer several unique advantages over other motor models, such as DC and AC motors, including:
Stepper motors allow precise incremental movement and are ideal for applications requiring precise positioning or repeatability.
Stepper motors are excellent at low speeds, which is very helpful for applications that require slow and controlled motion. They are also suitable for applications requiring high torque at low speeds, such as 3D printing, CNC milling and robotics.
Stepper motors are generally more economical than other motors with similar performance characteristics and consume relatively little power.
Stepper motors, like brushless DC motors, require less maintenance to keep them running efficiently for longer.
If you would like to know more details about how stepper motors can benefit and their suitability for your specific application, feel free to contact our technical advisors.
