Permanent magnet synchronous motor, and induction motor (that is, induction motor) is a common ac motor.The permanent magnet synchronous motor is the heart of the power system. It is a component integrating rotation and static, electromagnetic change and mechanical movement to realize the transformation of electrical energy and mechanical energy. Its dynamic performance is very complex, and its dynamic performance has a great impact on the dynamic performance of the whole power system.
- Jun 19 Fri 2020 08:52
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The difference between synchronous motor and and induction motor
- Jun 08 Mon 2020 17:56
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Aluminum anodized introduction
Brief introduction
Anodized aluminum or aluminum alloy products are placed in electrolyte solution for galvanization treatment, and the process of forming aluminum oxide film on the surface by electrolysis is called anodized treatment of aluminum and aluminum alloy. After anodic oxidation treatment, aluminum surface can produce several microns -- hundreds of microns of oxide film.Compared with the natural oxide film of aluminum alloy, its corrosion resistance, wear resistance and decoration are obviously improved and improved.
- Jun 02 Tue 2020 15:55
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Introduction about Brushed motor vs Brushless Motor
The brushed DC electric motor has a long history, more than 100 years.
The brushless DC electric motor has only around 40 years history.
- Jul 20 Fri 2018 09:34
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Key points of super low carbon content analyzing by high frequency infrared carbon sulfur analyzer
Key points of super low carbon content analyzing by high frequency infrared carbon sulfur analyzer are as follows:
- Jun 04 Mon 2018 09:10
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Development Status and Tendency of Alumina Ceramics
According the content, alumina ceramics are classified by #75, #85, #92, #95 and #99 ceramic, also with some more detailed categories. At present, #95 ceramic has the largest production, and it is most widely used in the market. With high hardness and abrasive resistance, and small dielectric loss, its performance can fulfill most of the industry technical requirements, which is much better than #75~#92 ceramics, while the production cost is only a little higher than #75 ceramic, so the production is the largest. However, requirement is increasing with development of technology, in many application cases, more and more #95 ceramic is replaced by #99 ceramic.
- Sep 27 Wed 2017 17:41
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How to install a Bilge Pump
The problems
In 1980s, most marines just used manually operated pumps. Since some boats are internal-ballast/keel design, there aren't any keel bolts to leak, and, if hull integrity is maintained, there should not be much water coming aboard, save for the dripping from the prop shaft. Of course, even a slow drip from a prop shaft can accumulate considerable water over time.
In 1980s, most marines just used manually operated pumps. Since some boats are internal-ballast/keel design, there aren't any keel bolts to leak, and, if hull integrity is maintained, there should not be much water coming aboard, save for the dripping from the prop shaft. Of course, even a slow drip from a prop shaft can accumulate considerable water over time.
- Sep 22 Fri 2017 08:55
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Using Experience of RV Macerator Pump
I installed a SEAFLO pump many years ago in Windsor shortly after we got it. The install was relatively simple. Positioning the pump so it will feed well from the sewage outlet took some consideration. Being entirely a d-i-y project, I had to do some searching to find a suitable outlet hose. I chose to get a transparent reinforced hose and cut it in sections of varying length so I could use only as much as I wanted. A friend of mine directed me to a shop that sells SEAFLO brand where I obtained quick connect endings for my hose sections so they snap together easily. It is really high quality and affordable. Look in the pump section for hose fittings. They come in sizes from 3/4 inch hose to 2 or three inch hose. When we visited my mother, her sewage clean-out for the house was 80 feet from where we parked. I had enough hose to handle that run and carried it with me. It paid off several times being able to take a site with no sewer hook-up but being able to dump at a nearby site (with permission) without having to relocate. I also had several sites where it was more convenient to park backward in the site and then run the hose under the MH to the dump on the other side.
- Aug 01 Tue 2017 09:13
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Hydrophilic PTFE Membnrane Filter
Starlab Scientific special produced Hydrophilic PTFE Membnrane Filter ,including unsupported hydrophilic single membrane and PP supported composite material composite hydrophilic membrane filter.
- Jul 19 Wed 2017 09:02
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HPLC Column Common Question
(1) mobile phase: must be used after chromatography through the filter after use, and the mobile phase ratio can not be completely in accordance with the standard, such as: ① norfloxacin capsule mobile phase with 0.025mmol / L, phosphoric acid Amine to adjust the pH to 3.O ± 0.1) a B (87:13).
Determination of sample retention time is long, after the experiment changed (84:16), so that the retention time control in 4min or so. ② Cefazolin sodium for injection: dissolved in sodium citrate solution (1.33g, 1.12g) was dissolved in 1000ml of a half (88:12), changed to (80:20) Misong sodium phosphate injection: methanol-034 potassium dihydrogen phosphate (58:42) changed to (64:36). ④ Shuanghuanglian injection: methanol a glacial acetic acid water (48: 1: 52) into (6,1: 1: 36) above the improvement can be satisfied with the results, fast. Good accuracy.
Determination of sample retention time is long, after the experiment changed (84:16), so that the retention time control in 4min or so. ② Cefazolin sodium for injection: dissolved in sodium citrate solution (1.33g, 1.12g) was dissolved in 1000ml of a half (88:12), changed to (80:20) Misong sodium phosphate injection: methanol-034 potassium dihydrogen phosphate (58:42) changed to (64:36). ④ Shuanghuanglian injection: methanol a glacial acetic acid water (48: 1: 52) into (6,1: 1: 36) above the improvement can be satisfied with the results, fast. Good accuracy.
- Jul 17 Mon 2017 08:49
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SPE Column Basic Steps
1) The filler retains the title compound
Solid phase extraction operation generally has four steps:
Activate - remove impurities from the column and create a solvent environment.
Loading - the sample is dissolved with a certain solvent, transferred into the column and the components remain on the column.
Leaching - to maximize the removal of disturbances.
Elution - elutes the test substance with a small volume of solvent and collects it.
Solid phase extraction operation generally has four steps:
Activate - remove impurities from the column and create a solvent environment.
Loading - the sample is dissolved with a certain solvent, transferred into the column and the components remain on the column.
Leaching - to maximize the removal of disturbances.
Elution - elutes the test substance with a small volume of solvent and collects it.
- Jul 12 Wed 2017 17:55
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PES Membrane Filter Introduction
Starlab polyethersulfone (PES) membrane filters have very low protein binding and high flow characteristics.suitable for biological samples and aqueous applications.
Modified, for asymmetric structure, with high flow rate, high throughput, high strength and high temperature characteristics,ideal for tissue culture media sterilization.
- Jul 06 Thu 2017 16:07
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The Feature of SPE Cartridges
1. Compared with the traditional liquid-liquid extraction and protein precipitation method, solid-phase extraction has unparalleled advantages:
Purification method: LLE (liquid-liquid extraction)
Advantages: No special equipment and materials required
Disadvantages: 1. Operation cumbersome and time-consuming
Purification method: LLE (liquid-liquid extraction)
Advantages: No special equipment and materials required
Disadvantages: 1. Operation cumbersome and time-consuming
