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Anonymous users2024-02-121.The structure of the permanent magnet synchronous motor is as follows: coil winding-stator, permanent magnet-rotor, so that the stator is energized to produce an alternating magnetic field, and the motor rotates.
2.Induction motor (AC induction motor, squirrel cage induction motor), the rotor is a closed coil, that is, a squirrel cage, the stator is an excitation coil, the stator generates an alternating magnetic field, the rotor induces the corresponding magnetic field, and then generates a force, and then rotates.
In order to convert energy, synchronous generators need to have a DC magnetic field. And the DC current that produces this magnetic field is called the excitation current of the generator.
Principle: According to the supply method of excitation current, all generators that obtain excitation current from other power sources are called separately excited generators, and those that obtain excitation power from the generator itself are called self-excited generators.
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Anonymous users2024-02-11You say that in this case, isn't it electromagnetism when energized?
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Anonymous users2024-02-10Wound rotor motors, also known as wound asynchronous motors, are a type of asynchronous motors.
Asynchronous motors are divided into winding type and squirrel cage type according to the rotor winding form. The motor rotor of the winding motor is a coil wound by copper wire, and the end of the coil is led to the starting control equipment through a slip ring, so the winding motor has the characteristics of small starting current, controllable, and large starting torque.
Main use: The asynchronous motor is mainly used as a motor. It is the most widely used and most demanded motor in various sectors of industrial and agricultural production and national economy.
Metal cutting machine tools, rolling equipment, blowers, pulverizers, water pumps, oil pumps, light industry machinery, textile machinery, mining machinery, etc.
Most of them are dragged by wound asynchronous motors. In people's daily life, the application of asynchronous motors is becoming more and more extensive, such as electric fans, washing machines, refrigerators, air conditioners and other household appliances, single-phase asynchronous motors are used. In electric dragging, the vast majority of drag motors are wound asynchronous motors, and their electricity consumption accounts for about 60% of the total load of the power grid.
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Anonymous users2024-02-09How the stator and rotor of the motor are connected: when the magnetic field generated by the stator of the motor interacts with the magnetic field generated by the rotor, the rotor of the motor operates; When the stator of the motor is energized, a magnetic field is generated around it; The rotor will induce electromotive force in the magnetic field, and there will be an electric current passing through the closed-loop rotor line, and there will also be a magnetic field around the rotor; Repulsion occurs when two magnetic fields are at the same pole; In the process of constantly changing the phase sequence of the stator power supply of the motor, the magnetic field of the stator is also constantly changing, and the motor is constantly rotating. The fixed part of the motor is called the stator, on which pairs of stationary main poles of DC excitation are installed. The rotating part (rotor) is called the armature core, and an armature winding is installed on it, and when the electricity is applied, an induced electromotive force is generated to act as a rotating magnetic field.
After that, electromagnetic torque is generated for energy conversion. The stator windings can be divided into two categories: centralized and distributed according to the shape of the coil winding and the embedded wiring method.
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