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 good 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
- Beginning of the Wye Delta
- Opening section
- Read sample number
- Main engine parts
- Standards (IEC)
- Engine maintenance
- Standard engine type 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.
The origin of the electric motor is shrouded in mystery, but this 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. Before Tesla’s time, the direct drive engine was produced in large quantities, but it was his development of the variable speed, variable displacement engine that ushered in 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 are channels that carry the energy of the work.
The allows the rotor and shaft to rotate and can then be combined with various tools to move and produce.
Many types of engines are produced today. The most common is undoubtedly an induction motor. The term “induction” is derived from the transfer of power from the stator to the rotor through an electronic circuit. There is no need for a slip ring or slip ring since the load currents in the rotor are driven by the movement of the transformer. 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.AC motors, both single-phase and polyphase (three-phase), are manufactured by Marathon Motors and many other manufacturers. 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. A single-phase motor does not produce a rotating field according to the standard, so a start switch has been added to create a polyphase field effect. After the motor starts, the starting rotation can be disconnected from the circuit, and the motor continues to operate on the rotating field current created due to the movement of the rotor interacting with the magnetic field of the same stator.
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 allows cutting-edge designs called pulse-width modulated AC models to be accelerated and control voltages equivalent or comparable to 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. The DC motor has a very high torque output and can be used with simple condition monitoring devices 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. In a conventional DC motor, the magnetic field is created by a strong constant current that replaces 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 batteries used to power mobile or remote applications.
Both AC and DC motors must be well designed to operate properly. Marathon Motors and other major manufacturers use laminated stators, rotors and armatures to reduce power and heat in motors. The rotor of an AC motor is heat treated to separate the aluminum rods from the rotor’s magnetic field. Tolerances and tolerances should be taken to the ten-thousandth of a centimeter. To reduce the vibration and noise of the, the entire structure of the engine must be solid. Installation of the stator and replacement of the coil must be done carefully to avoid 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 the still benefits from engine performance. Today’s industrial motors have power conversion efficiency of over 96% at maximum power.
This power combined with a long and reliable service life continues to work with the electric motor.
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