Otis Singleton
Electrical degrees are a unit of measurement used to describe the cycles of alternating current and voltages. One electrical degree is equal to one 360th of a cycle of alternating current. This concept is particularly relevant in the field of electrical engineering, which focuses on the study and application of electricity, electronics, and electromagnetism. Electrical engineering degrees provide students with the knowledge and skills needed to work with electrical systems and devices, and to contribute to the development of new technologies.
Characteristics and Values of an Electrical Degree
| Characteristics | Values |
|---|---|
| Definition | One 360th of a cycle of an alternating current |
| Relationship with mechanical degrees | In a two-pole machine, 360° of electrical cycle corresponds to 360° of mechanical rotation |
| Relationship with mechanical rotation | One complete revolution is 360° |
| Time interval | 1/360 of the time required for one complete cycle of alternating current |
| Alternating voltages and currents | The time for one complete cycle is considered to be equivalent to 360 electrical degrees (360°) or 2π electrical radians |
| Example | If the frequency f is 60 cycles per second (60 Hz), 360° corresponds to 1/60 second and 1 electrical degree to 1/21,600 second |
| Specialisations | Communication, Computers |
| Course structure | Both compulsory and elective modules |
| Assessment methods | Coursework, practical projects, long-form research essays, practical work under observation, written examination papers |
| Entry requirements | 88–160 UCAS points, maths at A Level, a science or technology-based subject at GCSE level |
| Career options | Electrical engineering, electronic engineering |
| Salary | Entry-level salary of £21,000–£25,000, Senior engineer salary of around £50,000 |
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What You'll Learn
Electrical engineering degrees
An electrical degree is a unit equal to one 360th of a cycle of an alternating current. It is a time interval equal to 1/360 of the time required for one complete cycle of alternating current. Mechanical rotation is often measured in degrees, with 360° constituting one complete revolution. In describing alternating voltages and currents, the time for one complete cycle is considered to be equivalent to 360 electrical degrees (360°) or 2π electrical radians.
Now, electrical engineering degrees refer to the academic qualification awarded to students who have completed a program of study in electrical engineering. Electrical and electronics engineers typically need at least a bachelor's degree in electrical engineering, electronics engineering, or a related engineering field. These programs include classroom, laboratory, and field studies. Courses include digital systems design, calculus, and electrical circuit theory.
Some employers may prefer to hire workers with a master's degree. However, licensure is not required for entry-level electrical and electronics engineering positions. Experienced engineers who wish to obtain a Professional Engineering (PE) license must have a bachelor's or higher degree in engineering, several years of relevant work experience, and passing scores on the Fundamentals of Engineering (FE) and PE exams.
High school students interested in studying electrical or electronics engineering benefit from taking courses in physics and math, including algebra, trigonometry, and calculus. Other courses, such as those in engineering, digital electronics, and drafting and design, may also be helpful.
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Alternating current
Electrical degrees refer to one 360th of a cycle of alternating current. In other words, it is the 360th part of the angle subtended at the axis of an alternating current by two consecutive field poles of like polarity.
AC is the most common form of current used in appliances and is delivered to businesses and residences. It is used to power kitchen appliances, televisions, fans, and electric lamps, among other things. AC has the advantage of being able to transmit power over large distances without significant energy loss, making it ideal for long-distance transmission and use in homes and offices.
AC can be generated using devices called alternators, which follow Faraday's principle of electromagnetic induction, converting mechanical energy into electrical energy. The basic setup for generating AC involves using a single-coil AC generator with two-pole magnets and a single rectangular loop of wire. The faster the alternator's shaft is turned, the faster the magnet spins, resulting in an alternating voltage and current that switches directions more frequently.
AC is also advantageous because it can be easily converted to and from high voltages using transformers. This property makes it suitable for powering electric motors, which convert electrical energy into mechanical energy. Additionally, AC is used in building efficient electric generators, motors, and power distribution systems.
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Mechanical rotation
In the realm of electrical degrees, one electrical degree represents the 360th part of a cycle of an alternating current. This can also be understood as a time interval equal to 1/360th of the time required for a complete cycle of alternating current. For instance, if the frequency is 60 cycles per second (60 Hz), each electrical degree corresponds to 1/21,600 of a second.
The relationship between electrical and mechanical degrees becomes evident in rotating electrical machines. In a two-pole machine, such as a two-pole alternator, 360 electrical degrees of one electrical cycle directly correspond to 360 mechanical degrees of rotation. This relationship simplifies the analysis of multipolar machines, allowing them to be studied as if they were two-pole machines.
However, the correspondence between electrical and mechanical degrees changes when considering machines with more than two poles. For example, in a six-pole machine, each revolution generates three cycles of voltage in each armature coil. Consequently, each mechanical degree is equivalent to three electrical degrees in this case. This relationship is given by the formula: one electrical cycle per pair of poles per revolution.
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Electrical angle
Electrical degrees are used to describe alternating voltages and currents, with one complete cycle being equivalent to 360 electrical degrees or 2π electrical radians. An electrical degree is equal to 1/360 of the time required for a complete cycle of alternating current. For example, a frequency of 60 cycles per second (60 Hz) would mean that 360° corresponds to 1/60 second and 1 electrical degree corresponds to 1/21,600 second.
The concept of electrical degrees is particularly useful when dealing with multipolar machines, as it allows them to be analysed on a two-pole basis. This means that the analysis of machines with multiple magnetic poles can be simplified. For instance, in a two-pole machine, 360° of electrical cycle corresponds to 360° of mechanical rotation. However, in a machine with more than two poles, one electrical cycle is generated per pair of poles per revolution. So, a six-pole machine would generate three cycles of voltage per revolution.
The electrical angle is the angle that occurs between each pole pair of a servomotor. It is the angle between the poles of the rotor and the stator. The relationship between the mechanical angle and the electrical angle is given by the equation: Electrical angle = (P/2) x Mechanical angle, where P is the number of poles. For a single pole pair, the electrical angle and the mechanical angle are equal. The electrical angle should repeat at each pole pair, and the number of repetitions in one mechanical turn of the shaft depends on the number of poles the motor has. For example, a six-pole motor will have an electrical angle that repeats three times in one mechanical revolution.
Technicians use electrical angles for testing and setting servomotor feedback alignment. Software takes feedback from different devices and generates a common electrical angle to show the position of the feedback. This allows technicians to follow a consistent procedure, regardless of the feedback type. Electrical angles are also used to record and set servomotor alignments, while mechanical angles are provided as a reference.
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Electrical engineering career prospects
Electrical engineering is a dynamic and diverse field that offers a wide range of career prospects for aspiring professionals. Electrical engineers are responsible for designing, developing, and testing electrical and electronic equipment, components, and systems. They work across various industries, including engineering services, research and development, and manufacturing, contributing their expertise to innovative projects.
Career Options
Electrical engineers have several specializations they can pursue, including:
- Power Engineering: Focusing on electric power generation, transmission, and distribution systems.
- Control Engineering: Designing and implementing control systems for various applications, such as automation or robotics.
- Electronics Engineering: Developing electronic components, circuitry, and products like audiovisual equipment or radar systems.
- RF (Radio Frequency) Engineering: Working with radio communications systems and technologies.
Job Responsibilities
Electrical engineers typically work in an office setting, but travel to project sites may be required to observe problems or complex equipment. They collaborate closely with other engineers and professionals to design and develop electrical systems and devices. This includes electric motors, navigation and radar systems, communication systems, and power generation equipment. Electrical engineers also play a crucial role in the automotive and aerospace industries, designing the electrical systems of automobiles and aircraft.
Educational Requirements
Becoming an electrical engineer typically requires a bachelor's degree in a related engineering field. Employers value practical experience, such as internships or participation in cooperative engineering programs. High school students aspiring to become electrical engineers should focus on mathematics and physics, including algebra, trigonometry, and calculus.
Job Outlook
The job outlook for electrical engineers varies across sources. While one source indicates a projected growth of 9% from 2023 to 2033, which is much faster than the average for all occupations, another source suggests a decline in projected job growth from 4% to 3%. However, it is important to note that the number of jobs requiring an electrical engineering degree is increasing, indicating a continued demand for professionals with this qualification.
Salary
Electrical engineers can expect competitive salaries, with a median annual wage of $106,950 in May 2023 in the United States. The salary may vary based on experience, specialization, and geographical location.
Overall, electrical engineering offers a range of exciting career prospects, contributing to the development and innovation of electrical and electronic technologies across various industries. With a strong educational background and practical experience, electrical engineers can look forward to rewarding career opportunities.
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Frequently asked questions
An electrical degree is a unit equal to one 360th of a cycle of an alternating current. It is used to describe alternating voltages and currents, where the time for one complete cycle is considered to be equivalent to 360 electrical degrees or 2π electrical radians.
The relationship between electrical and mechanical degrees depends on the number of poles in a machine. In a two-pole machine, 360° of electrical cycle corresponds to 360° of mechanical rotation. However, in a machine with more than two poles, one electrical cycle is generated per pair of poles per revolution. For example, in a four-pole machine, 360 electrical degrees will occur when the shaft rotates 180 mechanical degrees.
An Electrical and Electronic Engineering degree is a broad field that focuses on the study and application of electricity, electronics, and electromagnetism. It covers topics such as engineering, electronic systems, circuits, software, and manufacturing. Students can expect to study a range of compulsory and elective modules, allowing them to tailor their studies towards their career ambitions and interests.
