How to identify the noise of micro gear motor?

There will be various noise levels when utilizing the micro gear motor; how do you recognize the noise?Let us give you a brief introduction.

1. Power off method

After listening to the no-load motor for a while, the power supply is abruptly turned off, and part of the noise will instantly vanish as the power supply is turned off. This electromagnetic noise has characteristics that change with the strength of the magnetic field, the size of the load current, and the level of conversion. Mechanical noise is produced when a motor continues to run due to inertia after a power outage. To determine, repeat numerous times.

2. Change the voltage method

If the electromagnetic noise is the primary component of the motor noise and the power supply voltage is swiftly reduced to a particular limit (the speed does not change significantly), it will change significantly with the voltage while other noises remain largely unchanged.

3. Current test method

The current is unbalanced if the miniature gear motor's stator winding is asymmetrical, has internal phase failure, or has an inter-turn short circuit; if the rotor cage is broken or the rotor of the wound motor is asymmetrical, the stator current fluctuates, allowing electromagnetic noise to be identified.

4. Drag method

To determine the impact of carbon brush noise, rotate the tested motor using a low-noise motor while lifting and lowering the carbon brush numerous times.

5. Disassembly method

When the fan (a tiny geared motor) or external blower is removed, the aerodynamic noise's steady properties can be distinguished from other noises (large and medium-sized motors). The fan noise can also be discovered by swapping out existing fans for ones of various types and outer diameters, and by noticing how the noise changes with speed.

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