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In vector control, an AC induction or synchronous motor is controlled under all operating conditions like a separately excited DC motor. [21] That is, the AC motor behaves like a DC motor in which the field flux linkage and armature flux linkage created by the respective field and armature (or torque component) currents are orthogonally aligned such that, when torque is controlled, the field ...
Location of Singapore Singapore is a sovereign island country in maritime Southeast Asia. A global city, it has a highly developed market economy, based historically on extended entrepôt trade and more recently as a financial hub as well. Its economy is known as the most freest, most innovative, most competitive, most dynamic and most business-friendly in the world by various multinational ...
It may increase capitalisation by issue of further shares. The issued share capital of the company is the total number of shares existing in the company multiplied by the nominal value of each share. A company incorporated in England and Wales can be created with any number of shares of any nominal value, expressed in any currency.
Vacon NX frequency converter drives, also known as variable-frequency drives, were one of the two types of converters targeted by the Stuxnet Virus at the Iranian enrichment facility in Natanz, Iran. The worm would search a PLC for the specific identification number, in this case 9500h, that is assigned to the Vacon converter.
Limited liability company can be formed either by one person or by several individuals or legal entities (corporations). Maximum number of participants (founders) of LLC in Ukraine is 100. Since 2014 registration procedure has been significantly simplified in Ukraine. Minimum amount of authorised capital is 1 (one) hryvnia (less than 0,04 US ...
Pulse-Width Modulating (PWM) variable-frequency drive projects started in the 1960s at Strömberg in Finland. Martti Harmoinen [ fi ] is regarded as the inventor of this technology. [ 8 ] [ 9 ] [ 10 ] Strömberg managed to sell the idea of PWM drive to Helsinki Metro in 1973 and in 1982 the first PWM drive SAMI10 were operational.
A VFD operates on the principle of cathodoluminescence, roughly similar to a cathode-ray tube, but operating at much lower voltages. Each tube in a VFD has a phosphor-coated carbon anode that is bombarded by electrons emitted from the cathode filament. [1] [2] In fact, each tube in a VFD is a triode vacuum tube because it also has a mesh ...
Line regenerative variable frequency drives, showing capacitors (top cylinders) and inductors attached which filter the regenerated power A motor drive is a physical system that includes a motor. An adjustable speed motor drive is a system that includes a motor that has multiple operating speeds.