1. Definition and structure of hollow shaft stepper motors
Hollow shaft stepper motors are mainly composed of stators and rotors. The stator is fixed and usually consists of multiple coils; the rotor is a hollow structure with multiple magnetic poles inside. This design makes the motor more stable during operation, and the hollow shaft design also provides additional heat dissipation space for the motor.
2. Driving mode of hollow shaft stepper motors
1. Single voltage drive: In this mode, the motor winding is powered by only one direction voltage during operation. When the input signal is high, a sufficiently large base current is provided to make the transistor in a saturated state, and the power supply voltage acts entirely on the motor winding; when the input signal is low, the transistor is cut off and no current passes through the winding.
2. High and low voltage drive: In order to make the winding quickly reach the set current when powered on, and the winding current quickly decays to zero when turned off, while improving efficiency, high and low voltage drive modes have emerged. At the front edge of the conduction, a high voltage is used to supply power to increase the current rise rate, while a low voltage is used to maintain the winding current after the front edge.
3. Constant current chopper drive: This method is implemented through the self-excited constant current chopper drive block diagram, which converts the current value of the stepper motor winding into a certain proportion of voltage, and compares it with the preset value output by the D/A converter to control the motor current.
3. Core features of hollow shaft stepper motors
1. Structural design: The main structure of the hollow shaft stepper motor includes a stator and a rotor, in which the rotor is usually stacked with multiple silicon steel sheets, and the stator is fixed. This design makes the motor more stable during operation, and the hollow shaft design also provides additional heat dissipation space for the motor.
2. Wiring and heat dissipation: The design of the hollow shaft not only allows other parts of the motor to pass through, but also integrates additional functions as needed, such as heat dissipation, connection to other devices, etc. This design greatly optimizes the mechanical design, facilitates wiring, avoids cable distortion and damage, and saves design space and production costs.
3. High-precision requirements: For hollow shaft stepper motors with precision requirements, the inner hole diameter and thread precision requirements are very high, mainly used to meet the needs of using third-party trapezoidal screws or ball screws. This high-precision design ensures the mechanical precision and operating precision of the entire stepper screw motor.
4. Common applications of hollow shaft stepper motors
1. Automated production lines and robots: Hollow shaft stepper motors are used in automated production lines to accurately control the motion trajectory of the robot arm and improve the efficiency and precision of the production line. In the field of robotics, they improve the operating accuracy and flexibility of robots and are widely used in robotic arms and bionic prostheses, etc. 2. Medical devices: In the medical field, hollow shaft stepper motors are used in surgical robots and other medical equipment to ensure high-precision surgical operations and equipment control.
3. CNC machine tools: In the field of CNC machine tool manufacturing, stepper motors are used to accurately control the processing position and speed of workpieces to achieve high-precision processing.
4. Aerospace: Hollow shaft stepper motors have important applications in the aerospace field, such as rapid adjustment of missile flight direction, follow-up control of high-power optical drives, etc. Due to their light weight, small size and low energy consumption, hollow shaft motors are also widely used in aircraft and other aviation equipment.
5. Household appliances: Stepper motors are widely used in household appliances, such as refrigerator door locks, robot vacuum navigation, TV channel adjustment, etc.
6. Automobile manufacturing: In the field of automobile manufacturing, stepper motors are used for engine motor control, temperature control and air conditioning temperature adjustment, etc.
7. Optical and laser equipment: Hollow shaft stepper motors perform well in applications that require high-precision control, such as laser cutting, laser welding and laser marking. Its hollow structure facilitates the transmission of light beams and simplifies optical path design and integration.
8. Other applications: In addition, hollow shaft stepper motors are also used in various portable instruments, personal equipment, field operation instruments and equipment, electric vehicles, etc., to meet the needs of stable and long-lasting drag drive components.
Posted
May 06 2025, 01:49 AM
by
Amber16