One of the characteristics of stepping motor is that the machining accuracy of parts directly affects the vibration and noise level of motor. In order to obtain greater torque output capacity, the gap between rotor and stator is very small. The machining accuracy of stepper motor parts directly affects the vibration and noise level of stepper motor. In addition, the performance of silicon steel sheet and the product structure of stepping motor will also affect the noise level of stepping motor, and the production process level will also affect the noise level of stepping motor. Changzhou Hetai Electric Machinery Co., Ltd. is a micro motor manufacturing enterprise with new management mode and strong technical strength. High precision equipment and molds ensure the machining accuracy of parts.
Subdivision drive is the most common and simplest way to reduce the vibration and noise of stepping motor. The main function of subdivision drive is to make the stepper motor run smoothly. However, when the speed is below 60rpm, the operation smoothness of stepper motor is still not very good after subdivision drive, so other improvement measures can be considered. German TMC chip has silent chopper driving technology, which can be replaced with this better driving chip to improve the noise level.
A motor with high inductance is equivalent to a motor with low inductance, which is less prone to resonance. Even if it resonates, the degree of vibration and noise will be relatively light. Therefore, matching reasonable parameters has a good effect on reducing or avoiding the noise caused by resonance region.
The stepping motor equipped with reducer can improve the working speed of stepping motor, or the motor with reducer can adjust the reduction ratio, and can also avoid the resonance zone. If the reduction gearbox is added, the cost will often increase a lot, and the reduction gearbox has back clearance. It is necessary to confirm that the back clearance of the reduction gearbox has no impact on the use or has been eliminated in other ways.
On some occasions, there is no good improvement effect through the above methods, such as medical infusion pump. Because the working speed range is very wide, there must be resonance area in some speed ranges, resulting in relatively large noise. However, this equipment is generally used in intensive care unit, close to very weak patients, and the noise is required to be very low. After taking the above noise reduction measures, the effect is not ideal. At this time, the physical damping method of damping pad can be considered to further reduce the noise. In addition, the shock ring can also be used to make the operation smoother, but the price is too expensive and few people choose it.
Replacing the motor with a step angle of 1.8 ° of two-phase stepping motor with a step angle of 0.9 ° will generally improve the noise. Similarly, replacing the two-phase stepping motor with a three-phase stepping motor or a five phase stepping motor will generally improve the noise, but it will usually increase the cost, not only increase the motor cost, but also increase the driver cost. Customers who drive themselves should involve changing the circuit, Both time and economic cost need to be considered comprehensively.
Replacing an ordinary stepper motor with a stepper servo motor will also improve the noise of the stepper motor, but the cost of the stepper motor and the driver will increase. Because the stepper servo motor needs to be equipped with an encoder, the overall body becomes longer, and the installation size and space should also be considered.