ASLONG 37 Series DC Motor: Problem and Solution

I. Problem Identification

II. Problem Analysis

1. Low - Speed Stability: The motor's control precision is insufficient, especially when adapting to load fluctuations. This, coupled with sub - optimal matching of mechanical transmission components, results in speed fluctuations and even stalling at low speeds, thereby affecting the precision of equipment operation.
2. Noise: Noise primarily originates from electromagnetic sources and mechanical vibrations. Electromagnetic noise tends to be more pronounced under high - load or high - speed conditions, while mechanical vibrations are often associated with factors such as assembly precision, bearing quality, and rotor balance.
3. Insufficient Torque in High - Temperature Conditions: When operating in high - temperature environments, the motor experiences increased internal winding resistance and degraded magnetic performance, leading to insufficient torque output and potentially disrupting normal equipment operation.

III. Solutions

1. Optimize Control Algorithms: Advanced vector control algorithms are employed to enhance the control precision and dynamic response performance of the motor during low - speed operation. This enables stable speed output at low speeds and reduces fluctuations and stalling. Additionally, the parameter tuning method for the control system has been refined to better accommodate load variations.
2. Improve Mechanical Structure: The precision of motor assembly has been enhanced, high - quality bearings have been selected, and rotor dynamic balancing has been implemented. These measures effectively reduce mechanical vibrations and noise generation. The stator and rotor structures have also been optimized to minimize air gap unevenness and lower electromagnetic noise.
3. Enhance High - Temperature Performance: Materials with better high - temperature magnetic and insulating properties have been adopted to improve the stability of the motor's magnetic and insulating performance in high - temperature conditions. The motor's cooling design has been optimized by increasing the heat sink area and improving cooling ducts, thereby reducing winding temperatures and mitigating the impact of resistance increases on torque output.

IV. Implementation Results and Verification

1. Low - Speed Stability Improvement: After optimizing the control algorithms, the speed fluctuation range of the motor during low - speed operation has been reduced to within ±1%, significantly enhancing the precision of equipment operation.
2. Noise Reduction: A combination of electromagnetic and mechanical optimization measures has led to a reduction of approximately 3 - 5dB in motor noise under high - load and high - speed conditions, creating a quieter operating environment for the equipment.
3. High - Temperature Performance Enhancement: The use of materials with better high - temperature performance and improvements in cooling design have increased the motor's torque output capability in high - temperature conditions by about 15% - 20%, ensuring stable equipment operation even in high - temperature environments.

V. Conclusion and Outlook