Differences Between Inverter Motor and Ordinary Motor

Core Differences

1.Inverter motors are mainly used in special occasions with frequency converters. The difference from ordinary motors is that they are equipped with a forced cooling fan, which cannot be connected from the main motor's outgoing line and is powered by an independent power source. Its function is to ensure the cooling of the motor at low speeds.

2.Inverter motors can flexibly adjust according to load conditions to achieve energy-saving purposes; while ordinary motors cannot be adjusted.

3.There are great differences in manufacturing processes between ordinary motors and inverter motors. Ordinary motors are mainly designed based on the starting process and power frequency working conditions; while inverter motors are designed based on the starting process and working conditions within the frequency conversion range.

4.The wiring method of inverter motors is the same as that of ordinary motors, generally star connection. The difference is that inverter motors are equipped with an independent cooling fan at the back for forced cooling of the motor.

Structural Differences

1. The insulation grade of general inverter motors is F grade or higher, with enhanced ground insulation and turn insulation strength, especially considering the insulation's ability to withstand impulse voltage.

2. Inverter motors have higher requirements for vibration and noise.

3. The cooling method of inverter motors is different. Inverter motors generally adopt forced ventilation cooling, that is, the main motor's cooling fan is driven by an independent motor.

4. The protection measures are different. For inverter motors with a capacity exceeding 160KW, bearing insulation measures should be adopted. This is mainly because magnetic circuit asymmetry is likely to occur, which will also generate shaft current. When combined with currents generated by other high-frequency components, the shaft current will increase significantly, leading to bearing damage. Therefore, insulation measures are generally taken.

5. The heat dissipation system is different. To ensure continuous heat dissipation capacity, the cooling fan of the inverter motor is powered by an independent power source.

Since 1982, Dingbo Generator has been a generator set manufacturer qualified by the "National Internal Combustion Engine Quality Supervision and Inspection Center". The product quality has passed the IS09001 quality system standard certification. And obtained the qualification certificate for self-operated import and export. Over the years, Dingbo units have been widely used in all walks of life, and have won the network access qualification of the Ministry of Information Industry, the network access qualification of the Ministry of Radio and Television, the network access qualification of CNPC, the network access qualification of China Mobile, and the manufacturing qualification of marine units. In 2016, Dingbo was awarded the Certificate of Qualified Supplier of China Nuclear Power Group. Dingbo Generator has been cooperating with Shangchai Power for many years. In 2009, it became the OEM partner of Shangchai Power in China. Dingbo generator VOLVO unit ranks the top three in the Asia-Pacific sales volume, and is the core OEM partner of Sweden Volvo in the Asia-Pacific region. If any question please feel free to visit our website https://www.dieselgeneratortech.com/ or send email to [email protected].