What does the rotor voltage of a wound asynchronous motor mean?

The brake connected to the stator is semi-open after being turned on instantaneously, and the walking warning light connected to the stator does not work.

The rotating magnetic field is formed on the rotor by the main winding of the rotor through the slip ring power supply, the rotor pays the winding to induce the induction electricity of 50Hz, and the induced electricity passes through the commutator, and the output frequency of the carbon brush is equal to SF (S is the rotor slip rate, F is 50Hz), and the induction electricity is also induced on the stator at the same time, and its frequency is exactly equal to the frequency SF of the output of the rectifier from the carbon brush, and their three phases correspond to the potential of the stator winding of each phase, so that the two groups of relative positions of the carbon brush of the rotor commutator are controlled by the gear device, to control the output voltage of the commutator carbon brush, and finally to control the slip rate of the motor rotor, that is, the speed of the motor.

The reason why the wound asynchronous motor has three advantages is that because of the rotor coil, the rotor can not be voltaged, the rotor must be closed-circuit operation, can not be opened, and the current and voltage of the rotor are induced from the stator. Three advantages of wound asynchronous motor: 1

The rotor string resistance starts, and the starting current is 2The starting torque is high, and it can be started with heavy loads3The disadvantages of the rotor string resistance operation and the ability to change the speed of the wound asynchronous motor are:

1.Complex to manufacture and high cost 2High operation and maintenance costsWound asynchronous motors are mainly used in occasions such as high power, frequent starting, heavy-load starting, and speed regulation.

Wound 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.

The rotor of a DC motor is generally wound and welded to an armature at one end and connected to the circuit with a carbon brush.

DC motor, the output or input is Liangxiao DC electric energy of the motor definition of the output or input of direct current energy, the rotary motor is called a DC motor, it is a motor that can realize the conversion of direct current energy and mechanical energy. When it is used as a motor, it is a DC motor that converts electrical energy into mechanical energy; When the generator is running, it is a direct current generator, which converts mechanical energy into electric digging energy.

The stationary part of the DC motor when it is running is called the stator, and the main function of the stator is to generate a magnetic field, which is composed of a base, a main magnetic pole, a commutation pole, an end cover, a bearing and a brush device. The part that rotates during operation is called the rotor, and its main role is to generate electromagnetic torque and induced electromotive force, which is the hub for energy conversion of the DC motor.

Summary. The rotor of the three-phase asynchronous motor is mainly composed of three parts: the rotor shaft, the rotor core and the rotor winding.

1) Rotor shaftThe rotor shaft is generally made of medium carbon steel, which is used to fix and support the rotor core, and plays the role of transmitting mechanical power.

2) The rotor core is also part of the main magnetic circuit of the motor, and the rotor windings should be placed. It is also made of thick punched silicon steel punches with rotor geometries stacked. The rotor core of small and medium-sized asynchronous motors is generally directly fixed on the rotating shaft, while the rotor core of large asynchronous motors is sleeved on the rotor bracket, and then the bracket is fixed on the rotating shaft.

3) Rotor winding The rotor winding is the circuit part of the rotor, and its function is to cut the rotating magnetic field to generate induced electromotive force and induced current, thereby generating electromagnetic torque. Rotor windings can be divided into cage rotor winding and winding rotor winding according to different structural forms.

The rotor of the asynchronous motor is divided into several phases.

The rotor of the three-phase asynchronous electric machine is mainly composed of three parts: the rotor shaft, the rotor core and the rotor winding. 1) Rotor shaftThe rotor shaft is generally made of medium carbon steel, which is used to fix and support the rotor core, and plays the role of transmitting mechanical power. 2) The rotor core is also part of the main magnetic circuit of the motor, and the rotor windings should be placed.

It is also made of thick punched silicon steel punches with rotor geometries stacked. The rotor core of small and medium-sized asynchronous motors is generally directly fixed on the rotor sail shaft, while the rotor core of large asynchronous motors is sleeved on the rotor bracket, and then the bracket is fixed on the rotating shaft. 3) Rotor winding The rotor winding is the circuit part of the rotor, and its function is to cut the rotating magnetic field to generate induced electromotive force and induced current, thereby generating electromagnetic torque.

Rotor windings can be divided into cage rotor winding and winding rotor winding according to different structural forms.

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True/False, 5 marks).

The stator structure of cage motor and wound asynchronous motor is the same, why the difference is in the rotor.

True/False, 5 points) The stator structure of cage motors and wound asynchronous motors is the same, why the difference is in the rotor.

1. The difference in structure: 1) The squirrel cage is pure beat winding; 2) Winding winding, with slip rings; 2. The difference in mechanical properties: 1) Consolidation; 2) High speed does not solidify; 3. The difference between security:

1) Safety; 2) There are sparks in the brushes, and there is a fire and danger; 4. The difference between mechanical characteristics: 1) Mechanical characteristics, that is, constant speed; 2) Soft characteristics, speed adjustment in a small range; 5. Starting performance: 1) Large starting current and small torque; 2) The starting torque is large, which can reach the maximum torque, and the starting current is small; 6. Application:

1) Applicable to the occasion of constant speed requiring hard characteristics; 2) Use the occasion of the soft characteristics of speed regulation, such as cranes! 7. Starting principle: 1) Decompression start; 2) Change the slip rate to adjust the speed to start;

True/False, 5 marks).

The rotor windings of the wound asynchronous motor can be connected into a star or triangle like the stator. Why wrong.

The winding type refers to the rotor method, in order to reduce the lead wire, the rotor windings are connected into a star shape.

It has no effect on the no-load speed of the motor, but has an effect on the rated speed. The incoming resistor should be cut off immediately after the start is over.

When the three-phase stator winding of the motor (each with a difference of 120 degrees of electrical angle), after the three-phase symmetrical alternating current is introduced, a rotating magnetic field will be generated, which cuts the rotor winding, thereby generating an induced current in the rotor winding.

The current-carrying rotor conductor will generate an electromagnetic force under the action of the stator rotating magnetic field, which will form an electromagnetic torque on the motor shaft, drive the motor to rotate, and the motor will rotate in the same direction as the rotating magnetic field.

Summary. The three windings of a three-phase motor are symmetrically distributed in the stator. When the three-phase power supply is integrated, a rotating magnetic field is automatically generated, and an induced current is generated in the rotor cage, and the energized conductor is subjected to electromagnetic force in the magnetic field and will produce motion. Thus converting electrical energy into mechanical energy.

The rotor of the three-phase asynchronous motor does not have windings.

Here's a look for you.

Yes. The three-phase asynchronous motor is divided into two parts, the stator and the rotor, and the stator has coils on the upper side, which are connected into three groups in different ways, so it is called three-phase.

The three windings of a three-phase motor are symmetrically distributed in the stator. When the three-phase power supply is integrated, a rotating magnetic field is automatically generated, and an induced current is generated in the rotor cage, and the energized conductor is subjected to electromagnetic force in the magnetic field and will produce motion. Thus converting electrical energy into mechanical energy.

When the stator winding wiring method of the three-phase asynchronous motor is what or what, how about the synchronous speed of the rotating magnetic field, and how about the speed of the motor.

Hello, I am glad to answer for you, when the stator winding wiring mode of the three-phase asynchronous motor is three systems or three endpoints, the synchronous speed of the rotating magnetic field will be lower, and the speed of the motor will be reduced accordingly. This is because when a three-part system or three-point wiring scheme is employed, the driving EMF of the stator windings is smaller than that provided by the three separate stator windings, i.e., the magnitude of the torque is limited, resulting in a slowdown in the synchronous rotational speed of the rotating magnetic field. In addition, the wiring method of the stator winding of the three-phase asynchronous motor will also affect the power factor of the motor.

Because of the different wiring methods of the stator windings, the phase difference between the voltage and current of the canopy coil generated by the motor will be different, which will affect the power factor of the motor.

Of course, it can be started, but the starting performance of the wound motor is very bad. 1. The starting torque of the motor is small, and it may not be able to start if the seller has a load. 2. When starting, the power supply should be higher.

Because of this starting, the starting current is greater than that of a normal motor.