How can I buy a genuine motor, and how to distinguish the quality of the motor?

       There are many three-phase asynchronous motor manufacturers, and the quality and price are also different. Although my country has already formulated technical standards for motor production and design, many companies have adjusted the motor design according to the market segment needs, so as to form a motor on the market. Performance varies.

       Three-phase asynchronous motor is a product with very mature technology, and the production threshold is also low. In areas with developed industrial chains, small workshop-style motor factories can be found everywhere, but to achieve excellent motor performance and stable quality, it is still necessary to Only a large-scale motor factory can be guaranteed.

1

Silicon steel sheet

Silicon steel sheet is an important part of the motor, and it accounts for the main cost of the motor together with copper wire. Silicon copper sheet is divided into cold rolled steel sheet and hot rolled steel sheet. The country has long advocated the abandonment of hot rolled sheet. The performance of cold rolled sheets can be reflected in the grades. Generally, DW800, DW600, DW470, etc. are used. Ordinary asynchronous motors generally use DW800. Some enterprises use strip steel to manufacture motors, and the performance is obviously different.

2

Core length

The stator and rotor of the motor are all die-casted from silicon steel sheets. The length of the die-casting and the tightness of the die-casting have a great influence on the performance of the motor. The longer the die-casting length of the iron core, the tighter the power performance. Some companies reduce the cost by shortening the length of the iron core or reducing the price of the silicon steel sheet, and the price of the motor is low.

3

Copper trunking full rate

The copper wire slot full rate is the amount of copper wire used. The longer the iron core, the more copper wire consumption will be. The higher the slot full rate, the more copper wire is used. If the copper wire is sufficient, the motor performance will be better. Some production Without changing the length of the iron core, the enterprise reduces the stator slot shape, thereby reducing the amount of copper wire and reducing the cost.

4

bearing

The bearing is the carrier that bears the high-speed operation of the motor rotor. The quality of the bearing affects the running noise and heat of the motor.

5

chassis

The casing bears the vibration and heat dissipation of the motor during operation. Calculated by weight, the heavier the casing, the greater the strength. Of course, the appearance design of the casing and the appearance of die-casting are all important factors that affect the price of the casing.

6

craft

Including the machining accuracy of the parts, the rotor die-casting process, the assembly process, and the insulating dipping paint, etc., will affect the performance and quality stability of the motor. The production process of large-scale manufacturers is relatively strict, and the quality is more guaranteed.

In general, the motor is basically a product that pays for what you pay for. The quality of the motor with a large price difference will definitely be different. It mainly depends on whether the quality and price of the motor can meet the customer’s use requirements. Suitable for different market segments.

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Post time: Jul-19-2022