Content
- Introduction
- History and principles of electric motors
- General instructions for replacing the engine
- Main engine type
- Single-phase alternating current
- AC Polyphase
- Current (DC)
- Machine tools
- Engine brake
- Engines for efficient engine control
- Permanent Machine Engine (PMAC)
- Advantages of PMAC motors
- Machine vision
- Foundations and environments
- NEMA frame/axle size
- NEMA supplement
- Previous lines
- Ascension
- Mountain types
- Integration
- Engine instructions for belt requirements
- Electrical characteristics and connections
- Speed
- Category
- Current (amperes)
- Hertz / PK
- Speed
- Prevention class
- Service activities
- Capacity
- Good performance
- Encoders
- Thermal protection (top)
- Ground equipment
- Faraday’s shield
- Brush
- Ash ring
- Attachments
- Torque specifications
- Find individual locations
- Engine starting
- Offline starters Induction magnetic starters
- Reduce starting speed
- Starter for base resistive autotransformer
- The beginning of the Wye Delta
- Opening section
- Read a sample number.
- Main engine parts
- Standards (IEC)
- Engine maintenance
- Standard engine types and features
- Reduction gears and motor gearboxes
- Changing vehicle speed
- Technical information
- Dictionary
Preface
The electric motor, in its simplest definition, is the conversion of electrical energy into usable energy. The electric motor has played an important role in the efficiency of modern industry and is responsible for the high standard of living in the developed world.
Mystery shrouds the origin of the electric motor, but one thing seems clear: The basic principles of electrical induction were discovered by Oersted, Gauss, and Faraday in the early 19th century, and the combination of Scandinavian, German, and British ideas gave us the idea: the basis of the electric motor. The original invention of the piston engine in the late 19th century was by Nikola Tesla, a Serbian immigrant to America. A measure of Tesla’s genius is that he received more than 900 patents in the field of electricity. Large-scale production of the direct drive engine existed before Tesla’s time, but his development of the variable speed, variable displacement engine marked the beginning of a new era of innovation and production.
The principle of the electric motor is based on the fact that a conductor with a lease, when placed in an electric current, will exert a force on the tube proportional to the current passing through the conductor and the force of gravity. In an alternating current motor, windings placed on the stator of the electric motor create a magnetic field. The aluminum rods in the rotor of the laminate act as channels, carrying the energy of the work.
This enables the rotor and shaft to rotate, allowing for movement and production when combined with various tools.
Today, manufacturers produce a wide variety of engines. The most common is undoubtedly an induction motor. The transfer of power from the stator to the rotor through an electronic circuit gives rise to the term “induction”. The transformer’s movement drives the load currents in the rotor, eliminating the need for a slip ring. An induction motor is essentially a transformer. The stator winding is the primary winding, and the rotor bars and end rings are the moving parts. Marathon Motors and many other manufacturers manufacture both single-phase and polyphase (three-phase) AC motors. In a polyphase motor, the arrangement of winding groups and successive phases of the supply line creates a rotating field on the surface of the rotor. The rotor tends to follow this rotating field with a rotational speed that varies inversely proportional to the number of poles wound on the stator. The standard does not allow a single-phase motor to produce a rotating field, so the addition of a start switch creates a polyphase field effect. Once the motor initiates, the circuit can disconnect the starting rotation, allowing the motor to continue operating on the rotating field current that the rotor’s movement interacts with the same stator’s magnetic field to produce.
Advances in power semiconductors and microprocessors have led to a faster way to control the speed of an AC motor through an inverter. This technology accelerates cutting-edge designs known as pulse-width modulated AC models, enabling them to control voltages equivalent to or comparable to those of existing systems.
Marathon Motors also offers a direct permanent magnet motor. The DC motor is the oldest member of the electric motor family. Technological advances in magnetic materials, as well as electronic controls and highly rechargeable batteries, have breathed new life into the DC motor. Simple condition monitoring devices can use the DC motor’s very high torque output to provide smooth and consistent acceleration over a wide range of selectable speeds. Since the speed of a DC motor does not depend on the number of poles, there are many variables for any fixed or variable speed requirement. A strong constant current creates the magnetic field in a conventional DC motor, replacing conventional coil fields. Magnets do not require electricity from an electrical outlet. This improves engine performance and reduces interior heat. Additionally, the reduced design extends the life of the batteries used to power mobile or remote applications.
For proper operation, both AC and DC motors require a well-designed structure.Laminated stator, rotor, and armature are used by Marathon Motors and other major manufacturers to reduce power and heat in motors. An AC motor’s rotor undergoes heat treatment to isolate the aluminum rods from the rotor’s magnetic field. Maintain tolerances and tolerances to the ten-thousandth of a centimeter.To reduce vibration and noise, the entire engine structure must be solid. Carefully install the stator and replace the coil to prevent damage to the wires or coils. And the supports must meet the required standards. This is especially true for motors with NEMA C internals used for direct connection to reducers, pumps, and other equipment.
The electric motor is truly the heart of every driving machine. If the engine does not start, the machine or tool is not working. The importance of the electric motor in modern life is evident from the fact that millions of electric motors convert more energy than all our passenger vehicles. The electric motor is more efficient at converting power than a car but plays a greater role in the overall power picture, so it still benefits from engine performance. Today’s industrial motors have a power conversion efficiency of over 96% at maximum power.
The electric motor continues to function with this power and a long and reliable service life.
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