Hybrid Stepper Motor

- Dec 06, 2018 -

Hybrid stepper motors produce up to 200 steps per revolution. Therefore, the hybrid motor has the technical advantage of providing high torque at start-up and low speed. The resolution can be increased by microstepping to ensure smoother operation and more accurate positioning. These features help engineers reduce or even discard gearboxes, significantly increasing the reliability and compactness of the final system. In addition, the hybrid stepper motor uses brushless technology, there is no friction between the parts, and the service life is longer than other technologies. Based on these characteristics, hybrid stepping motors are widely used in medical automation equipment with a mechanical power of less than 50 watts.


Hybrid motors require current rectification. Conventional motors operate in open loop mode and typically have volume issues, often requiring an "oversized" shape to ensure no out of step or stall. Although this low-cost solution is widely used, there is still a risk of inherent dysfunction. The use of large motors does not guarantee that the machine will not malfunction for unknown reasons. When the motor is operated in an open loop mode, the functional motor, encoder and electronics can be packaged in a component that is generally undetectable and can damage the component. Load or the machine itself. As a result, most hybrid stepper motors used in medical or laboratory equipment are connected to the encoder to provide permanent and accurate angle measurements.


The encoder used in the motor drive and machine control components checks the actual operation of the motor. Depending on the sensitivity of the application, different types of encoders can be specified. In some rigorous applications, the resolution of the encoder must be very high and accurate, especially when the motor requires direct operation without attenuation coefficients. In these applications, optical encoders are typically mounted on the back of the motor. Standard motors usually contain two axes to meet the mounting requirements of different models. It should be noted that the installation of such precision instruments usually requires professional attention and attention to detail.