What is a stepper motor?
The stepping motor is also called a stepping motor. As a stepping motor, the stepping motor is one of the key products of electromechanical integration. It is widely used in various automatic control systems. With the development of microelectronics and computer technology, the demand for stepping motors is increasing day by day, and there are applications in various national economic fields.
A stepper motor is an actuator that converts electrical pulses into angular displacements. When the stepper driver receives a pulse signal, it drives the stepper motor to rotate in a set direction by a fixed angle (referred to as "step angle"), and its rotation is performed step by step at a fixed angle. By controlling the number of pulses to control the amount of angular displacement, so as to achieve the purpose of accurate positioning; at the same time by controlling the pulse frequency to control the speed and acceleration of the motor rotation, so as to achieve the purpose of speed control. The stepping motor can be used as a special motor for control, and it is widely used in various open-loop control by utilizing its characteristics that it has no accumulated error (accuracy is 100%).
Now more commonly used stepper motors include reactive stepper motors (VR), permanent magnet stepper motors (PM), hybrid stepper motors (HB), and single-phase stepper motors.
Permanent magnet stepper motors are generally two-phase, with small torque and volume. The step angle is generally 7.5 degrees or 15 degrees.
Reactive stepping motors are generally three-phase, can achieve large torque output, step angle is generally 1.5 degrees, but the noise and vibration are great. The rotor of the reactive stepper motor is magnetically routed from a soft magnetic material, and the stator has a multi-phase excitation winding that generates torque using a change in magnetic permeability.
Hybrid stepping motor refers to the advantage of mixing permanent magnet type and reactive type. It is divided into two phases and five phases: the two-phase step angle is generally 1.8 degrees and the five-phase step angle is generally 0.72 degrees. This type of stepper motor is the most widely used and is also the stepper motor used in this subdivision drive scheme.
Some basic parameters of the stepper motor:
Motor inherent step angle:
It represents the angle at which the motor rotates each time the control system sends a stepping pulse signal. The motor is given a step angle value, such as the value given by the 86BYG250A motor is 0.9°/1.8° (represents 0.9° for half-step operation and 1.8° for full-step operation), this step angle It can be called 'motor's inherent step angle', which is not necessarily the actual step angle when the motor is actually working. The actual step angle is related to the driver.
Stepper motor phase number:
Refers to the number of coils inside the motor. At present, there are two-phase, three-phase, four-phase, and five-phase stepper motors. The number of phases of the motor is different, and its step angle is also different. Generally, the step angle of the two-phase motor is 0.9°/1.8°, the three-phase is 0.75°/1.5°, and the five-phase is 0.36°/0.72°. Without subdividing the driver, the user mainly selects the different number of phase stepper motors to satisfy his own step angle requirement. If you use a subdivision driver, the number of 'phases' will become meaningless, and the user can change the step angle by simply changing the number of subdivisions on the drive.
Hold TORQUE:
It refers to the moment that the stator locks the rotor when the stepping motor is energized but not rotated. It is one of the most important parameters of the stepper motor. Usually, the torque of the stepping motor at low speed approaches the holding torque. Since the output torque of the stepper motor is continuously attenuated with the increase of the speed, the output power also changes with the increase of the speed, so the holding torque becomes one of the most important parameters for measuring the stepper motor. For example, when people say that a 2N.m stepping motor, it means a stepping motor with a holding torque of 2N.m unless otherwise specified.
The stepping motor is also called a stepping motor. As a stepping motor, the stepping motor is one of the key products of electromechanical integration. It is widely used in various automatic control systems. With the development of microelectronics and computer technology, the demand for stepping motors is increasing day by day, and there are applications in various national economic fields.
A stepper motor is an actuator that converts electrical pulses into angular displacements. When the stepper driver receives a pulse signal, it drives the stepper motor to rotate in a set direction by a fixed angle (referred to as "step angle"), and its rotation is performed step by step at a fixed angle. By controlling the number of pulses to control the amount of angular displacement, so as to achieve the purpose of accurate positioning; at the same time by controlling the pulse frequency to control the speed and acceleration of the motor rotation, so as to achieve the purpose of speed control. The stepping motor can be used as a special motor for control, and it is widely used in various open-loop control by utilizing its characteristics that it has no accumulated error (accuracy is 100%).
Now more commonly used stepper motors include reactive stepper motors (VR), permanent magnet stepper motors (PM), hybrid stepper motors (HB), and single-phase stepper motors.
Permanent magnet stepper motors are generally two-phase, with small torque and volume. The step angle is generally 7.5 degrees or 15 degrees.
Reactive stepping motors are generally three-phase, can achieve large torque output, step angle is generally 1.5 degrees, but the noise and vibration are great. The rotor of the reactive stepper motor is magnetically routed from a soft magnetic material, and the stator has a multi-phase excitation winding that generates torque using a change in magnetic permeability.
Hybrid stepping motor refers to the advantage of mixing permanent magnet type and reactive type. It is divided into two phases and five phases: the two-phase step angle is generally 1.8 degrees and the five-phase step angle is generally 0.72 degrees. This type of stepper motor is the most widely used and is also the stepper motor used in this subdivision drive scheme.
Some basic parameters of the stepper motor:
Motor inherent step angle:
It represents the angle at which the motor rotates each time the control system sends a stepping pulse signal. The motor is given a step angle value, such as the value given by the 86BYG250A motor is 0.9°/1.8° (represents 0.9° for half-step operation and 1.8° for full-step operation), this step angle It can be called 'motor's inherent step angle', which is not necessarily the actual step angle when the motor is actually working. The actual step angle is related to the driver.
Stepper motor phase number:
Refers to the number of coils inside the motor. At present, there are two-phase, three-phase, four-phase, and five-phase stepper motors. The number of phases of the motor is different, and its step angle is also different. Generally, the step angle of the two-phase motor is 0.9°/1.8°, the three-phase is 0.75°/1.5°, and the five-phase is 0.36°/0.72°. Without subdividing the driver, the user mainly selects the different number of phase stepper motors to satisfy his own step angle requirement. If you use a subdivision driver, the number of 'phases' will become meaningless, and the user can change the step angle by simply changing the number of subdivisions on the drive.
Hold TORQUE:
It refers to the moment that the stator locks the rotor when the stepping motor is energized but not rotated. It is one of the most important parameters of the stepper motor. Usually, the torque of the stepping motor at low speed approaches the holding torque. Since the output torque of the stepper motor is continuously attenuated with the increase of the speed, the output power also changes with the increase of the speed, so the holding torque becomes one of the most important parameters for measuring the stepper motor. For example, when people say that a 2N.m stepping motor, it means a stepping motor with a holding torque of 2N.m unless otherwise specified.