Solution
Popular keywords: EPS stator automatic line, rotary motor stator automatic line, automobile blower brushless line, automobile brushless cooling fan motor automatic line, servo motor automatic line
FAQ
I believe that most of our friends know that the motor burned out, generally speaking, the direct cause is high temperature, so what are the main causes of high temperature motor? Hopwise briefly analyze it for you!
First, the internal causes of the motor
1. In the installation and maintenance of the motor, wiring errors;
2. Winding or turn-to-turn short-circuit resulting in an increase in the winding, three-phase current imbalance;
3. Wrong connection of coils in the pole-phase group or uneven distribution of the number of coils in each phase, resulting in unbalanced three-phase no-load current and excessive current;
4. Friction heat generated by stator and rotor;
5. Overheating of motor bearings.
Second, the motor load reasons
1. The motor is overloaded for a long time, and the stator current far exceeds the rated current, resulting in motor overheating;
2. Frequent starting of the motor, resulting in excessive motor temperature rise;
3. The motor is stuck and does not rotate or the speed drops sharply, resulting in a rapid increase in current;
4. mismatch between the working system of the motor and the working system of the load.
Third, the environment and ventilation and heat dissipation reasons
1. The working environment of the motor can not get good ventilation and heat dissipation, resulting in high temperature;
2. Excessive dust and grease in the motor are not conducive to the heat dissipation of the motor;
3. The fan is damaged, deformed, loose, not installed or not installed backward, resulting in poor ventilation and motor heat dissipation.
The above is the introduction of the main reasons for the motor burned out, I believe that we have understood, master these basic knowledge, in order to ensure the safe and stable operation of the motor!
In the past, the production of motors are assembled manually, which is relatively inefficient and suitable for small batch products; but now with the motor automatic production line, it not only greatly improves the assembly efficiency of motors, but also is suitable for mass production, and the quality effect of motors is more stable.
During the operation of fully automatic motor automatic production line, the automatic assembly line is used in conjunction with two-speed chain conveyor to combine motor rotor, motor stator and motor assembly parts. The production site is standardized and orderly, greatly reducing the need for manual labor. The automatic motor production line combines mechanical equipment and conveyor lines to realize the loading, unloading and turnover of motor rotors, stators and components. At the same time, it uses real-time displacement monitoring to realize safe and accurate automated production of electric motor equipment.
The main components of the fully automated motor assembly line are: assembly line body, assembly workstations, fans, presses and tightening machines. Every 1.5 meters is one station, and there are about 20 stations in the whole line. According to the product structure setup, the driving part of the line body consists of pneumatic station, lifting platform, descending platform, pull-up bar, descending bar and electrical device. The two ends of the lifting platform and lowering platform are driven up and down by hydraulic cylinders, and the conveying trolley is sent to the upper and lower pipe line body. Cylinders drive the front and back movement, and the upper claw pushes the trolley to move forward. The motor assembly line takes 90 seconds to complete a cycle. It is interlocked and linked with the press-fit machine. Each pneumatic machine is equipped with a safety grating, as well as force and displacement detection functions, which improves the quality and productivity of the motor equipment produced and makes production safer.
The application of full-automatic motor automatic production line is important for the development of motor manufacturing industry, which solves the general defects of low efficiency, unstable quality and low yield in the traditional manual assembly, and upgrades the automated production of motors to a higher level!
We all know that the iron core inside the motor, wrapped with copper wire on it, it is a more important part of the motor, it and the rotor core, stator and rotor between the air gap together to form a complete magnetic circuit, mainly by the fan-shaped piece, ventilated groove piece, positioning rib, upper and lower teeth pressure plate tension bolts and pallets and other components. So what is the role of the stator core?
The main use of silicon steel sheet stamped into a fan-shaped piece installed in the positioning bar, positioning bar through the bracket welded to the seat ring plate, the core is loaded with windings, motor operation, the stator core will be subject to mechanical force, thermal stress and electromagnetic force combined effect.
So what are the requirements for a high-quality stator core?
1. Good magnetic conductivity, low loss, different parts of the temperature difference should not be too large.
2. Good rigidity, vibration is relatively small, between the punch should maintain a certain pressure.
3. The overall structural composition of the arrangement, to have a good ventilation effect.
4. After stacking, the stator core inner diameter and slot size to meet the accuracy requirements, the core should be fastened to prevent short-circuiting between the punching piece, slot indexing accuracy needs to reach the level of angular grading, to avoid affecting the precision index of the motor.
The above is the role of the stator core and its requirements, only a full understanding of this knowledge, the design of a reasonable core, with a reasonable winding, coupled with all aspects of the composition of the accessories, so as to ensure that the motor long and stable operation!
Full-automatic motor assembly line, also called motor assembly line, including stator production line, rotor production line, shell assembly, etc., gradually has become popular in China, drawing on the technical characteristics of Europe, America and Japan, combined with their own innovation and research and development, the production capacity of motor production line is stable, high efficiency and safety, so what is motor production line? What are the functional characteristics of motor production line?
I. Introduction of motor production line
Motor production line is an effective combination of man and machine. It makes full use of the relatively stable production capacity of mechanical equipment and high equipment utilization rate. The motor stator device and motor rotor device are rapidly mass-produced, and high-quality electrical equipment is produced and assembled in a short period of time.
Second, the function of the motor assembly line
1. High equipment utilization, improve productivity, a set of fully automatic motor production line investment, relative to the manual assembly of the output increased by several times , and effectively improve the productivity of the enterprise.
2. Relatively stable production capacity, motor production line is a kind of high-tech, high-efficiency machinery and equipment, can realize uninterrupted production and assembly, and more stable production of products.
3. High product quality, automatic motor production line is a high-precision equipment with very strict requirements for products, effectively reducing the generation of defective products.
4. Reduced labor cost, fully automatic motor production line is controlled by computer system, only need to be set up by professional operators before production, can complete the production and assembly according to the requirements.
The above is the automatic motor production line introduction and characteristics of the introduction, whether it is a stator production line, or rotor production line, relative to a single production method, the combination of this effective combination of ways to greatly save labor, improve production efficiency, will be the focus of the future trend tendency!
With the continuous development of the motor industry, the use of automated machinery and equipment gradually replace the traditional manual processing methods, such as automatic rotor production line is into this. Due to the increased demand for products and the continuous improvement of quality, for the rotor automatic production line efficiency and requirements are becoming more and more high, then how to improve the rotor automatic production line efficiency?
1. Detect the current load condition of rotor automatic assembly line
Detect the motor load current condition of rotor automatic production line, or detect the three-phase current balance. If the upper limit value of two-phase current does not exceed the rated current value, the unbalanced current should not exceed 10%. When the phase difference is relatively large, the rotor automatic assembly line may experience short circuits, breaks, commutations, and other faults, or the motor may operate in one phase. When this occurs, stop operation of the equipment immediately, check the cause of the problem and resolve it before operation. Basically, large rotor automatic production line is equipped with an ammeter, so you can observe the real-time condition at any time. If some small rotor automatic production lines are not equipped with an ammeter, you can install an additional clamp-on ammeter for testing.
2. Increase the frequency of the power supply voltage of the automatic rotor production line.
Automatic rotor assembly line over speed operation, can increase the power supply voltage frequency of the equipment, can also use auxiliary equipment to test the rotor of the automatic assembly line running speed. Alternatively, a frequency conversion device can be used to increase the frequency of the line line supply voltage. Improvements in operation can be made by decreasing the current or increasing the armature terminal voltage. The increase in voltage is less than the rated voltage and the decrease in current will result in a steady increase in the line's operating speed.
These are the ways to improve the efficiency of the rotor automatic production line. After these operations, the production speed can be accelerated and the working efficiency can be improved.
Previously commonly used is a brushed motor, but with the development of science and technology, cost reduction, many areas gradually began to use brushless motors, there are still many differences between brushed motors and brushless motors, specifically in what areas?
Brushed motor performance characteristics:
1, brush motor structure is simple, long development time, technology is more mature.
2, brushed DC motor response speed, starting torque, smooth speed change, speed from zero to the maximum almost imperceptible vibration.
3、Brushed DC motor runs smoothly and has good starting and braking effect. The brushed motor is regulated by voltage and speed regulation, so it is stable in starting and braking, and it is also stable in constant speed operation.
4, DC brushed motors have high control accuracy, DC brushed motors are usually used in conjunction with gearboxes and encoders, which makes the motor output power greater and the control accuracy higher.
5, DC brushed motor low cost, easy maintenance. Due to the simple structure of DC brushed motor, low production cost, many manufacturers, mature technology, is also widely used, such as factories, processing machine tools, precision instruments.
Brushless motor performance characteristics:
1. Brushless, low interference, brushless motor removes the brush, the direct change is that the brush motor does not produce electric sparks when running, greatly reducing the electric sparks on the remote control radio equipment interference.
2. Low noise and smooth operation, brushless motor without brushes, running friction is greatly reduced, smooth operation, noise is much lower.
3. Long life, low maintenance cost. Without brushes, the wear and tear of brushless motor is mainly on the bearings. From the mechanical point of view, brushless motor is almost a maintenance-free motor. When necessary, only some dusting maintenance is required.
For the time being, although brushless motors are a bit more expensive than brushed motors, with the development of technology, the price is gradually becoming affordable. Brushed motors are still good in occasions where the requirements are not high and the frequency of use is small.
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