Two phase open-loop stepper motor (brake type) is a type of motor that combines a stepper motor and a brake device. It can not only achieve precise position and speed control, but also has the ability to maintain the current position without moving when power is off. The following is a detailed analysis of the motor:
1、 Basic Composition
The two-phase open-loop stepper motor (brake type) is mainly composed of a stator, rotor, electromagnetic coil, and brake device. The stator is covered with electromagnetic coils, which generate a magnetic field when current passes through; The rotor contains multiple pole pairs, usually made of magnetic materials. The braking device is a key component used to lock the rotor position when the motor stops running.
2、 Working principle
Step control: Similar to ordinary two-phase open-loop stepper motors, when the current passes through the electromagnetic coil in sequence, the generated magnetic field will attract the magnetic poles in the rotor, causing the rotor to rotate at a certain angle in steps. The angle and speed of this step rotation can be precisely adjusted by controlling the frequency and number of pulse signals.
Braking mechanism: The braking device usually works through mechanical or electromagnetic means. When the motor is running normally, the brake device is in a released state and does not affect the rotation of the rotor. When the motor needs to be stopped or powered off, the braking device will quickly respond, locking the rotor position to prevent it from moving due to external forces or inertia.
3、 Characteristics and advantages
Precise control: The stepper motor itself has the ability to accurately control position and speed. Combined with the brake device, it can maintain position stability even in the event of power failure, improving the reliability and accuracy of the system.
Self locking function: The brake device endows the motor with self-locking ability, allowing the motor to maintain the load position unchanged even without continuous power supply, reducing energy consumption and maintenance costs.
Widely used: Due to its precise control and self-locking function, the two-phase open-loop stepper motor (brake type) is widely used in applications that require high-precision positioning and control, such as automation equipment, robots, medical equipment, precision instruments, and other fields.
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