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- 22.15+0.20 (+0.91%)2024/04/27 09:09 臺灣股市 已收盤 (報價延遲20分鐘)。
- 昨收21.95開盤22.10委買價22.15委賣價22.20
- 今日價格區間22.10 - 22.5052週價格區間21.70 - 33.10成交量29549 張平均成交量16987 張
- 市值90.90 億本益比 (最近12個月)不適用營運報告/法說會日期2024-05-06除權除息日-
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Taiwan Semiconductor Manufacturing Company Limited ( TSMC; also called Taiwan Semiconductor) [4] [5] is a Taiwanese multinational semiconductor contract manufacturing and design company. It is the world's second most valuable semiconductor company, [6] the world's largest dedicated independent ("pure-play") semiconductor foundry, [7] and its ...
- 73,090 (2022)
- US$73.67 billion (2022)
Powerchip Semiconductor Manufacturing Corporation ( PSMC) manufactures and sells semiconductor products, in particular memory chips and other integrated circuits. As of 2020, the company was the 7th largest semiconductor foundry in the world with three 12 inch and two 8 inch wafer labs. [1] The company offers foundry services as well as design ...
- 1994; 29 years ago
- Hsinchu Science Park
- 7,000
- Semiconductors
- History
- Background
- Applications
- See Also
- External Links
Samuel Earnshaw was the one to discover in 1839 that “a charged body placed in an electrostatic field cannot levitate at stable equilibrium under the influence of electric forces alone”. Likewise, due to limitations on permittivity, stable suspension or levitation cannot be achieved in a static magnetic field with a system of permanent magnets or f...
Electromagnets
When a current passes through a wire, a magnetic field around that wire is generated. The strength of the generated magnetic field is proportional to the current through the wire. When a wire is coiled, this generated magnetic field is concentrated through the center of the coil. The strength of this field can be greatly increased by placing a ferromagnetic material in the center of the coil. This field is easily manipulated by passing a varying current in the wire. Therefore, a combination o...
Feedback
The position of the suspended object can be detected optically or magnetically, other schemes may sometimes be used. The feedback circuit controls the electromagnet to try to keep the suspended object at the correct position. However, simply controlling the position usually leads to instability, due to the small time delays in the inductance of the coil and in sensing the position. In practice then, the feedback circuitry must use the change of position over time to determine and damp the speed.
Hybrid Electromagnetic Suspension
In the 21st century there has been several proposals to use hybrid electromagnetic suspension (also known as H-EMS) as an upgrade to the classical EMS configuration by adding permanent magnets to the electromagnets forming what it's called an array of electropermanent magnets. This configuration has proven to increase air gap and reduce energy consumption and is being used by both maglev and hyperloopexperts.
Maglev
Maglev(magnetic levitation) is a transportation system in which a vehicle is suspended on a guiding rail by the principle of electromagnetic suspension. Maglev has the advantages of being quieter and smoother than wheeled transportation due to eliminating much of the physical contact between wheels and track. Since a maglev requires a guiding rail, it is mostly used in railed transport systems like trains. Since the first commercial maglev train was opened in Birmingham, England in 1984, othe...
Active magnetic bearing
An active magnetic bearing (AMB) works on the principle of electromagnetic suspension and consists of an electromagnet assembly, a set of power amplifiers which supply current to the electromagnets, a controller, and gap sensors with associated electronics to provide the feedback required to control the position of the rotor within the gap. These elements are shown in the diagram. The power amplifiers supply equal bias current to two pairs of electromagnets on opposite sides of a rotor. This...
Spaceship Launch Aid
NASA has been developing a launch aid using a magnetic levitation system to propel a spaceship. Proponents of maglev launch aid posit that it saves on design and launching costs, while providing a safer launching method.
BOSE Electromagnetic Suspension: 1. Bose | Feel More, Do More | Headphones, Speakers, Wearables Archived 2015-07-11 at the Wayback Machine 2. Magnetbahnforum | Inventors | The inventors of maglev technology 3. Electromagnetic suspension and levitation
It originated as a schematic drawing of the earliest type of battery, a voltaic pile. An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections [1] for powering electrical devices. When a battery is supplying power, its positive terminal is the cathode and its negative terminal ...
MEDICIS. Produces isotopes for medical purposes. The Large Hadron Collider ( LHC) is the world's largest and highest-energy particle collider. [1] [2] It was built by the European Organization for Nuclear Research (CERN) between 1998 and 2008 in collaboration with over 10,000 scientists and hundreds of universities and laboratories across more ...
Excess steam from the drywell enters the wetwell water pool via downcomer pipes. SFP: spent fuel pool area. SCSW: secondary concrete shield wall. The Fukushima nuclear accident was a major nuclear accident at the Fukushima Daiichi nuclear power plant in Ōkuma, Fukushima, Japan which began on March 11, 2011.
Solar power, also known as solar electricity, is the conversion of energy from sunlight into electricity, either directly using photovoltaics (PV) or indirectly using concentrated solar power. Solar panels use the photovoltaic effect to convert light into an electric current. [2] Concentrated solar power systems use lenses or mirrors and solar ...
