Qingdao Joymost Industry Co., Ltd

17/09/2022

It isn't what we say or think that defines us, but what we do.

One of customers asked a question: Why can some motors run at two rated voltages without the windings being burned? This is a pretty interesting question. For any motor, the rated voltage is a very critical parameter, when the motor does not work in the rated voltage fluctuation range, the motor can

13/12/2021

Sometimes things go better when you just say no.

https://www.linkedin.com/posts/qingdao-joymost-industry-co-ltd_electricalmotorproducts-electricmotorsforsale-activity-6875965825187229696-FuuL

08/11/2021

In view of the liberalized electricity price, high-efficiency motor will become a relatively cost-effective choice!

Any enterprise will carry on the overall accounting from the input and cost, and then choose a more cost-effective scheme, which is also a problem that can not be bypassed in the process of high-efficiency motor promotion.

From the analysis of the development and manufacturing cost of the motor, compared with the low-energy-efficient motor, the high-efficiency motor has a larger investment in material input and manufacturing technology, which naturally raises the sales price of the motor; and for motor consumers, there is always a balance and choice between purchasing investment and electric energy consumption.

Based on the relatively low electricity price, no matter what kind of measures and arguments, it is difficult to shake the strong will of motor consumers, if there is no overall macro-control, the micro awareness of energy conservation can hardly be greatly improved.

For the energy-saving effect of motors, more cutting-edge high-energy-consuming enterprises, through theoretical calculation and practical comparison and calculation, a large number of high-efficiency motors have been replaced, in the case of constant electricity price, the energy-saving effect has been considerable, when the electricity price has been adjusted, the relative advantage of electricity cost will be more obvious.

The recently released electricity price liberalization policy, for high energy-consuming enterprises to take unlimited measures, will greatly stimulate the energy-saving awareness of such enterprises, and for the motor industry, the promotion and application of efficient motors will also have more opportunities.

The amount of electricity consumed under the same workload is the most direct method to directly evaluate whether the motor is energy-saving, because there will be some differences in the current and speed of the motor with the same specification.

Therefore, motor consumers are not advised to evaluate the energy-saving level of the motor simply from the current, but to evaluate the overall energy-saving effect by determining the same quantitative workload.

01/11/2021

Does the size of the shaft hole of the rotor punch affect the output power of the motor?

There is a customer, put forward the same punching, shaft hole size change, the impact on the performance of the motor. This is a very professional problem, which will involve the material selection of the shaft.

In more cases, we tend to analyze and judge the performance of the shaft, that is, the mechanical performance of the motor, that is, the compliance with the load being dragged during the operation of the motor, but in practical application, the selection of the rotating shaft of the motor will affect the electrical performance of the motor, as well as other factors such as temperature rise, output power and so on.

In the actual motor products, we can find that the motors with the same center height and different poles, especially the 2-pole motors, have the same outer diameter of the rotor but different shaft diameters compared with the multi-pole low speed motors. there is also the case that the same specification motor uses amplitude plate shaft and solid shaft.

Both cases involve the question raised by the customer, that is, what is the impact on the performance of the motor when the parameters of other elements do not change, but only the diameter of the shaft hole changes?

In addition to fixing and supporting the electrified conductor, the stator core and rotor core of the motor also play a very important role in magnetic conduction, that is, the necessary composition of the magnetic circuit of the motor, the material of the silicon steel sheet, the effective length of the iron core, and the cross section of the iron core. all have a direct impact on the performance of the motor.

From the analysis of the final results, when the magnetic density of the rotor yoke is not too saturated and the common magnetic guide shaft is used, it does not have much effect on the performance of the motor; however, if the rotating shaft is a non-magnetic conductive material (such as stainless steel material), especially when the rotor magnetic density is relatively saturated, it will cause the rotor yoke magnetic density to be oversaturated because of the enlargement of the shaft hole, which will affect the performance of the motor, and even cause excessive current to burn out the motor.

Therefore, in the manufacturing process of the motor, especially in the repair process of the motor, if the change of the rotor punching plate is involved, whether it is the adjustment of the shaft hole or the selection of the axial vent to improve the temperature rise level of the motor, it should be calculated professionally, otherwise it is very likely that the performance of the motor will not meet the requirements.

12/10/2021

Repair yourself when you encounter difficulties, and don't complain with others, because there is already something wrong with your when you do that. You should figure out where you are wrong and what you should adjust.

It's hard to others, and it's hard to change yourself, but only when you change yourself can you have hope.

08/10/2021

What are the inspection items that should be carried out before using the motor intermittently?

The quality and performance of the motor body are very important to any consumer, but in the actual selection and operation of the motor, the motor and the environment, and suitability, as well as different working conditions, consumers are particularly important for the maintenance and maintenance of the motor. To some extent, it is directly related to the safety of the motor.

Some motors run for a long time, while some motors run intermittently because of various factors, such as heating equipment, fire fighting equipment, and so on, which run periodically and irregularly according to seasonal characteristics.

For the intermittent operation of the motor, because of the storage environment and the protective characteristics of the motor body, there may be a lot of unsuitabilities, so basic inspection and maintenance should be carried out before re-operation to prevent unnecessary quality accidents.

1. Inspection of the motor wiring system

In the connection part between the motor and the power supply, because of the difference in the temperature of the motor running and out of operation, as well as many factors such as vibration during the motor operation, the problem of loosening the fasteners in the connection part of the wiring system may occur. Therefore, the basic inspection should be carried out before the motor is running again, and new fasteners should be replaced if necessary.

2. Moisture driving treatment of motor windings

For a relatively long storage time, the large temperature difference between motor operation and storage, and moist air in the storage environment, moisture treatment should be carried out before the motor is electrified.

For large and medium-sized motors, the motors leave the factory with special winding heating devices, such as moistureproof heating tropics, moistureproof heaters, etc., different manufacturers or different types of motors, equipped with moisture-proof heating devices will be slightly different, but the principle is the same.

The specific operation is carried out according to the maintenance and operation manual of the motor.

For motors without moisture-proof heating conditions, external heating, ventilation, and drying can be carried out according to the level of protection, but the influence of heating temperature on motor windings and related parts must be strictly controlled.

3. The conformance of the connecting part of the motor

Whether the connection of the motor is loose or stuck should be checked by the way of disk movement, especially for the motor bearing system, ventilation and heat dissipation parts, and so on.

For the daily maintenance instructions of the motor, most motor manufacturers will give relatively detailed instructions and requirements, motor users should be combined with their own conditions for targeted inspection.

04/10/2021

Recently, we are busy with the evaluation of the third batch of design demonstration enterprises of industrial products in our country.

This evaluation activity is a substantive work carried out by our country to speed up the implementation of green design and promote the development of industrial green and cycle, and it is the highest standard evaluation and competition from the national level.

“Made in China 2025” clearly proposes to implement five major projects, namely, the construction of a national manufacturing innovation center, intelligent manufacturing, strong industrial base, green manufacturing, and high-end equipment innovation, through government guidance and integration of resources, achieving key common technological breakthroughs that restrict the development of the manufacturing industry for a long time, and enhance the overall competitiveness of China’s industry.

As the most widely used power source at present, the green designers and manufacturers of motor products should actively assume their responsibility for national green development and manufacturing.

In recent years, many established manufacturing enterprises and some rising stars of motor manufacturing have made constructive and considerable development in terms of the inheritance and development of motor technology and the intelligent construction of modern manufacturing enterprises; fortunately, our motor enterprises can take the initiative to assume the social responsibility of their own development and efforts to contribute to the society.

30/09/2021

Seeing that our is still running, I feel a little sad.

Because the founder who has been in contact with me is gone, only the rotating is left, which seems to be telling the story of our past.

30/09/2021

Today, we organized singing competition for employees' and outdoor trip to celebrate the motherland a happy 72nd !

Wish Our Thriving Prosperity!