"Wall fan motor" is a machine used to realize the mutual conversion of mechanical energy and AC electrical energy. Due to the great development of AC power systems, wall fan motors have become the most commonly used motors. Since the wall fan motor does not have a commutator, it has a simple structure, is convenient to manufacture, and is relatively firm, and it is easy to be made into a motor with high speed, high voltage, large current, and large capacity.
What is the principle of the use of wall fan motors?
Use a wall fan motor to explain: a wall fan motor has two windings, namely the starting winding and the running winding. The two windings differ in space by 90 degrees. A large-capacity capacitor is connected in series with the start winding. When the running winding and the start winding pass through a single-phase alternating current, the current in the start winding is 90 degrees ahead of the current in the running winding due to the action of the capacitor and reaches the maximum first. value. Two identical pulsed magnetic fields are formed in time and space so that a rotating magnetic field is generated in the air gap between the stator and the rotor. Under the action of the rotating magnetic field, an induced current is generated in the motor rotor, and the current interacts with the rotating magnetic field to produce The electromagnetic field torque causes the motor to rotate.
How to classify wall fan motors?
Wall fan motors can be divided into synchronous motors and asynchronous motors according to the speed.
1. synchronous wall fan motors. There are three main operating modes of synchronous motors, namely, operating as generators, wall fan motors, and compensating machines. Running as a generator is the most important operating mode of a synchronous wall fan motors, and running as a motor is another important operating mode of the asynchronous wall fan motors. The power factor of the synchronous motor can be adjusted. In occasions where speed regulation is not required, the application of a large synchronous wall fan motors can improve operating efficiency. In recent years, small synchronous motors have been widely used in variable frequency speed regulation systems.
A Synchronous wall fan motor can also be connected to the grid as a synchronous compensation machine. At this time, the motor does not carry any mechanical load, and the required inductive or capacitive reactive power is sent to the grid by adjusting the excitation current in the rotor to achieve the purpose of improving the power factor of the grid or adjusting the grid voltage.
2.asynchronous wall fan motors. Asynchronous motor is a kind of AC motor, the ratio of the speed of its load and the frequency of the grid-connected is not a constant relationship. It also changes with the size of the load. The greater the load torque, the lower the speed of the rotor. Asynchronous wall fan motors include induction motors, doubly-fed asynchronous motors and, AC wall fan motors. Induction motors are the most widely used. Generally speaking, induction motors can be called asynchronous motors without causing misunderstanding or confusion.
The asynchronous wall fan motors have a simple structure, convenient manufacture, low price, and convenient operation.
What are the advantages of wall fan motors?
1. Wall fan motors are cheaper to manufacture.
2. With the development of vector frequency conversion technology, a frequency conversion motor can be used to simulate direct current.
3. Compared with DC motors, wall fan motors have sufficient advantages in simple structure, easy maintenance, low environmental requirements, energy-saving, and increased productivity so that AC speed regulation has been widely used in industrial and agricultural production, transportation, national defense.
Yuexun Electric Appliance Co., Ltd. has developed a variety of different wall fan motors and conducted a large number of tests before leaving the factory to ensure the quality. If you are in the wall fan motors business, you can consider using our cost-effective products.
Guangzhou Yuexun Electric Appliance Co., Ltd. is newly established head office for AC motor DC motor Exhaust fan and fan parts in 2017. It is based on the family company in Zhongshan. Which has more than 12 years experiences in design and production.
