China coal machinery network exclusive interview with Shandong Bocheng Electric Co., Ltd.: we have selected the permanent magnet motor closest to the intelligent one, hoping to realize "China Intelligent Manufacturing"
2019-08-15 02:29
On July 30, in the paper of "in 5 to 10 years, this technology may occupy the highland of intelligent driving of mining equipment", the industry buzzword "permanent magnet motor" was discussed, and the development outlet of permanent magnet motor for 5 to 10 years was pointed out. Recently, permanent magnet motors have also appeared frequently in news interviews covering the intelligent status of coal mines, such as "Tongxin coal mine promotes the construction of intelligent mines with scientific and technological innovation", "Yankuang Group vigorously promotes intelligent mining", "less talents to help -- Shandong energy Zao coal mine group Binhu coal mine washing plant takes the lead in completing the production target of 36 people", etc.
Although the data on the use of permanent magnet motor in the whole coal industry is not available to us for the time being, "permanent magnet" is undoubtedly one of the hot technical labels in the coal circle in recent years. A group of its data in the field of new energy passenger vehicles may help us see the tip of the iceberg of the rapid development of the permanent magnet motor industry.
According to statistics of the Ministry of industry and information technology, as of December 2018, China's new energy passenger vehicles had more than 160000 motors, of which the permanent magnet synchronous motor accounted for 92.3%.
The improvement of integration level, the optimization of protection and control functions, and the improvement of cost competitiveness provide good conditions for the wide application of permanent magnet motor, and promote it to become more and more popular in various application scenarios in the coal industry.
Dr. Liu Bin of Shuangma coal mine, Shenhua Ningmei coal mine, said at a technical exchange meeting last year entitled "Application of permanent magnet motor in coal mine underground", with the improvement of coal situation, in 2018, Ningmei group has assembled more than 60 permanent magnet synchronous motors. For Shuangma coal mine, 10 permanent magnet motors have been assembled, and all the transportation drives from comprehensive mining to coal washing plant are assembled with permanent magnet Step motor.
At the end of last year, the upgrading and transformation achievements of the main transportation system of the mine of zhangjiamao company of Northern Shaanxi mining industry were reported by the news media: "the belt conveyor is driven and controlled by permanent magnet synchronous motor + intelligent frequency converter, and the belt conveyor intelligent protection system and intelligent speed control system are used instead of the fixed one by adopting intelligent perception, fault diagnosis, automatic control and information communication technology Assign personnel on duty to realize the intelligent monitoring and monitoring of the main transportation system and "manned patrol, unattended"
Bocheng electric permanent magnet synchronous motor -- site of commissioning and acceptance of Hancheng coal machine in zhangjiamao coal mine
Among them, the supporting belt conveyor of Xi'an Heavy Loading Hancheng coal machinery plant, the permanent magnet synchronous motor serving zhangjiamao coal mine is from Shandong Bocheng Electric Co., Ltd. (hereinafter referred to as Bocheng electric). As the leader of permanent magnet motor industry, Yin Chao, general manager of Bocheng Electric Co., Ltd., accepted an interview with China coal machinery network at Xinjiang International Mining and Equipment Expo and the 14th Xinjiang Coal Industry Expo, and talked about the enterprise's point of view on permanent magnet motor manufacturing.
Yin Chao, general manager of Bocheng Electric Co., Ltd. interviewed with coal machine network
For permanent magnet motor, Yin Chao described it as "high technology in the circle". As one of the "visionary enterprises", Yin Chao said that Bocheng Electric will continue to provide convenience for equipment operation and system design, better expand product performance, and transition from "made in China" to "made in China".
At the end of this paper, we attach the introduction of two of the products of Bosheng electric intelligent permanent magnet for readers to further understand.
TBVF(flameproof) series permanent magnet synchronous variable frequency motor is a new type of driving equipment independently developed and produced by the company for the coal mine industry, which can be used to drive various general machinery, such as belt conveyor, scraper, elevator and other mechanical equipment. The motor adopts Exd Ⅰ MB explosion-proof grade, which can replace the original asynchronous motor + reducer drive mode, and directly drive the pulley of the belt conveyor, Shortens the drive chain. Improve transmission efficiency.
Technical advantages:
The drive system cancels the transmission mechanism such as reducer and gearbox, so the transmission efficiency is high;
The energy saving effect is good, and the motor reaches the first level energy consumption (IE4) standard;
Large starting torque, stable starting performance, good speed following performance. The motor adopts soft starting technology, small starting current. When the load increases instantaneously, the driving torque can realize fast following, effectively prevent the occurrence of locked rotor, and the system has high safety performance;
The communication function is powerful. Under the condition of multi machine driving, the power balance is guaranteed accurately, the system stability is improved, and the motor life is increased;
It has a wide range of high efficiency. Under 20% - 120% load, the motor power can be kept near the rated efficiency;
Low cost of equipment maintenance, basically maintenance free;
Do not need regular oil injection, maintenance, etc., which is conducive to the maintenance of clean and tidy plant environment;
Compared with asynchronous motor of the same specification, the motor is compact in structure, small in volume, light in weight and small in floor area;
According to the needs of users, the technical parameters such as motor speed can be designed separately.
Three level technology is used in the integrated machine of frequency conversion and speed regulation, with low output peak voltage (within 4000V) and small external interference. The output waveform is similar to sine wave, which is more in line with the working condition of the motor. There is no influence on the underground automation ring network, which is suitable for the underground intelligent mine and the coal mine with high requirements of automation working face. The product has a variety of communication interfaces, which can be integrated into various protocols and requirements.
Technical advantages:
1. No filter and reactor required for long-distance power supply
2. Eliminate the influence of internal resistance of long-distance power supply cable on inverter control
3. Eliminate the possibility of long-distance power supply cable to ground harmonic breakdown
4. The motor is specially designed according to the frequency conversion performance, with longer service life
5. No interference to other equipment, more stable system operation
6. There is no impact on the power grid, and the starting current is small
7. Small volume, no need to place the chamber or occupy the equipment train
8. Maintenance free, improve production efficiency, reduce maintenance cost and maintenance time
★ advantages of intelligent variable frequency speed regulating permanent magnet integrated machine
In addition to the above functions, it has the following advantages:
Good power saving effect: the power saving rate is more than 30% higher than that of asynchronous machine
Small starting current: under the same starting torque, the starting current is 15% less than that of the asynchronous machine
Large starting torque: under the same frequency conversion capacity, the starting torque is more than 15% higher than that of the asynchronous machine
High power factor: power factor is more than 25% higher than that of asynchronous machine
Small calorific value: the temperature under the same load capacity is more than 5 ℃ lower than that of the asynchronous machine
Small volume: at the same power, the volume is more than 10% smaller than that of asynchronous machine.