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An electric motor is a device converting electrical energy into mechanical energy usually a torque. The theory used in the work was collected by studying literature on how electrical motors work, and by simplifying the explanations to suit the intended reader. A critical political economy of trade theory and practice trade test power electrical installation level 1 pdf trade off theory eletronic. Electrical trade theory n2 study guide pdf pdf book. Using proprietary algorithms, the 438ii measures the threephase current and voltage waveforms and compares them against rated specifications to calculate motor mechanical performance.
Induced voltage opposes applied voltage and limits current. What is an electric motor an electric motor is a device converting electrical energy into mechanical energy usually a torque. The induction motor is made up of the stator, or stationary windings, and the rotor. On this page you can read or download electrical trade and theory n1 11 november 2014 y paper in pdf format. This portable document format pdf file contains bookmarks, thumbnails, and hyperlinks to help you navigate through the document. The department of higher education and training makes provision for a bursary fund per tvet college in order facilitate optimum access for financially needy and. Draw a circuit diagram of a splitphase motor that has one capacitor which is permanently connected during operation. The following exam papers are available with their memos in a single downloadable pdf file. This equipment is needed in systems of electric lighting and power, and intercommunications. All engineering books pdf download online, notes, materials, exam papers, mcqs for all engineering branch such as mechanical, electronics, electrical, civil, automobile, chemical, computers, mechatronic, telecommunication any all more popular books available here.
The concept of the rotating magnetic field is central to ac motor theory, so it is imperative that students grasp this concept before moving on to more advanced concepts. The most fundamental law in electricity is ohms law or vir. The electrical science handbook consists of fifteen modules that are contained in four volumes. Theory fitting and machining theory motor trade theory instrument trade. Question papers and memos for n2 engineering science, n2. Most electric motors operate through the interaction between the motor s magnetic field and electric current in a wire winding to generate force in the form of torque applied on the motor s shaft. In this section a pool of electrical topics ranging from atomic structure, ohms law to ac machines are covered. This programme offers an ntc bridging course and n1 n3 qualifications in motor trade theory. Get n2 electrical trade theory book pdf file for free from our online library pdf file. Electrical trade theory download ebook pdf, epub, tuebl. People depend on professional electricians for their electrical repair, maintenance, and installation needs. Brushes are sacrificial components that wear over time, and. In general, the induction motor is cheaper and easier to maintain compared to other alternatives. The v is for voltage, which means the potential difference between two charges.
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Dc motors although ac motors are used in most of the cases, dc motors have many applications and used for multipurpose applications. Although the commutator and brushes are key elements that make a permanent magnet dc motor work, they are also the weakest link in the system. Electrical trade and theory n1 11 november 2014 y paper. Click download or read online button to get electrical trade theory book now. On this page you can read or download electrical trade theory n2 textbook pdf in pdf format. In this post we cover ohms law, ac and dc current, circuits and more. Oclcs webjunction has pulled together information and resources to assist library staff as they consider how to handle. The following exam papers are available for sale with.
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