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7.5 Kw Induction Motor

1、7.5 kw induction motor.
2、Motor can be customized.
3、Made in Chinese factory, price discount.
4、Cast iron housing, aluminum housing.
5、The motor is made of Chinese high quality copper wire.

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Basic principle

Induction motor is also known as asynchronous motor, its working principle is based on the law of electromagnetic induction. When the stator winding is fed into the three-phase AC, a rotating magnetic field is generated inside the motor. The speed of this rotating magnetic field is called the synchronous speed, and its size is related to the power supply frequency and the number of motor poles. Under the action of the rotating magnetic field, the rotor winding will generate induced electromotive force and induced current, and then be affected by the electromagnetic force in the magnetic field, so that the rotor rotates in the direction of the rotating magnetic field, but the rotor speed is always lower than the synchronous speed, thus achieving the conversion of electrical energy to mechanical energy.

Main feature

Simple structure: The structure of the induction motor is relatively simple, mainly composed of two parts of the stator and the rotor, the stator is wound on the three-phase winding, the rotor is generally squirrel cage type or winding type, this simple structure makes the motor manufacturing and maintenance costs are low, high reliability.

Reliable operation: Because it does not have complex reversing devices and vulnerable parts such as brushes, under normal operating conditions, the 7.5kw induction motor has a low failure rate, a long service life, and can operate stably in harsh working environments.
High efficiency: The operating efficiency of the induction motor under the rated load is usually more than 80%, which can effectively convert electrical energy into mechanical energy, reduce energy waste and reduce operating costs.

Speed regulation performance is poor: compared with DC motors, asynchronous motors speed regulation performance is relatively poor, generally by changing the number of poles, frequency conversion speed regulation and other ways to achieve speed regulation, but these methods will increase the complexity and cost of the system to a certain extent.

Application field

Industrial field: It is widely used in all kinds of industrial production, such as driving fans, pumps, compressors and other equipment to provide power support for industrial production, and has a large number of applications in metal processing, chemical, textile, paper and other industries. For example, in chemical production, 7.5kw induction motors can drive chemical pumps to transport various chemical liquids.

Commercial field: common in some commercial equipment, such as central air-conditioning system cooling tower fans, elevators, etc. Taking central air conditioning as an example, the cooling tower fan is usually driven by induction induction motor, which drives the fan to rotate through the operation of the motor to realize the heat exchange between air and water in the cooling tower and ensure the normal operation of the central air conditioning system.

Agricultural field: induction induction motor can be used to drive the pump in agricultural irrigation equipment, transport water from the water source to the farmland, ensure the irrigation needs of crops, can also be used to drive some agricultural processing machinery, such as food dryers, feed shredders, etc.

Selection precautions

Load characteristics: The appropriate motor needs to be selected according to the specific load type. For constant torque loads, such as cranes, conveyor belts, etc., motors with higher starting torque should be selected; For constant power loads, such as machine tool spindles, you need to choose a motor with a wide speed range.

Working environment: Consider the working environment of the asynchronous motor, such as temperature, humidity, dust and other factors. If the working environment is harsh, a motor with a higher protection level should be selected to ensure the normal operation and service life of the motor. For example, in wet, dusty environments, IP54 or IP55 protection grade motors can be selected.

Power supply conditions: to choose the motor according to the power supply voltage, frequency and other conditions on the site. The rated voltage of 7.5kw induction motor is 380V, 220V, etc. It is necessary to ensure that the rated voltage of the selected motor matches the field power supply voltage, otherwise the motor may not work normally or even be damaged.

Installation mode: Select the appropriate installation mode according to the actual installation space and requirements, such as horizontal installation and vertical installation. Different installation methods have certain requirements for the structure and size of the motor, and it is necessary to ensure that the induction induction motor can be installed in a predetermined position and is well connected with other equipment.