Three Phase Asynchronous Motor-Explosion-Proof Motors Manufacturer | Longchi Motor

Three Phase Asynchronous Motor

Founded

20+

years

About Us
20+ years experience

ABOUT US

Shandong Longchi Motor Co., Ltd. Since its establishment in 2002, the company has been deeply rooted in the field of motor manufacturing, forging ahead with perseverance and achieving continuous growth and expansion. It is located in Linqing City, Shandong Province, where convenient transportation and abundant industrial resources provide a unique geographical advantage for the company's development.

WHY US

Longchi specializes in the research, development, production, and sales of electromechanical products, including three-phase asynchronous motors, explosion-proof motors, brake motors, cutting motors, drilling and milling motors, high-speed spindles, and asynchronous/synchronous permanent magnet motors.

The company has introduced internationally advanced production equipment and automated production lines, such as high-precision CNC machining centers, automated assembly lines, and intelligent inspection systems. These ensure high-precision and high-quality manufacturing while significantly improving production efficiency and effectively reducing costs, thereby securing a competitive edge in the market.

The company’s products have obtained multiple certifications, including 3C, CE, and UL, as well as numerous industry accolades, such as “National High-Tech Enterprise” and “Industry Gold Medal for Quality.” Adhering strictly to the ISO9001 quality management standard, the company implements rigorous quality control at every stage—from raw material inspection and production process monitoring to finished product testing—ensuring consistent and reliable product quality.

Guided by a customer-centric philosophy, the company provides comprehensive, one-stop premium services. It has established an extensive after-sales service network supported by a professional team, offering timely technical support, maintenance, repair, and parts replacement to ensure customers’ complete satisfaction and worry-free operation of the products.

Machine Tool Industry Lathes, Milling Machines, CNC Machin

Drives various metal-cutting machine tools such as lathes, milling machines, drilling machines, grinding machines, and CNC machines, as well as forging equipment including presses, bending machines, and shearing machines.

Industry Applications

Machine Tool Industry Lathes, Milling Machines, CNC Machin

Mining and Metallurgical Industry

Provides power for heavy equipment such as crushers, ball mills, conveyors, hoists, blast furnace blowers, and rolling mills.

Industry Applications

Mining and Metallurgical Industry

Construction and Building Materials Industry

tower cranes, concrete mixers, mortar pumps, brick and tile forming machines, cement rotary kilns, fans, and other equipment.

Industry Applications

Construction and Building Materials Industry

Petrochemical Industry

Drives centrifugal pumps, compressors, mixers, oil pumps, transfer pumps, and other equipment. Specialized models meeting explosion-proof and corrosion-resistant requirements are in high demand for demanding operating conditions.

Industry Applications

Petrochemical Industry

News Center

What are the voltage and frequency specifications for Three Phase Asynchronous Motors, and are they compatible with power grids in different countries?
Jun - 12 - 2026
What are the voltage and frequency specifications for Three Phase Asynchronous Motors, and are they compatible with power grids in different countries?

Our Three Phase Asynchronous Motors support customization for mainstream global voltages and frequencies, making them fully compatible with power grid standards in various countries and regions. Customers do not need to install additional transformers or variable frequency drives; the motors can be directly connected to the local power grid for immediate use. The core standard specifications and customization options are as follows:

Do you offer customization services for Three Phase Asynchronous Motor, and what does the scope of customization include?
Jun - 11 - 2026
Do you offer customization services for Three Phase Asynchronous Motor, and what does the scope of customization include?

Our company has a professional R&D and custom manufacturing team that supports comprehensive non-standard customization services. We can tailor three Phase Asynchronous Motor to meet customers’ specific operating conditions, equipment requirements, and technical parameters, fulfilling a wide range of personalized needs. The scope of customization covers the following core areas:

What are the differences between the IP44, IP54, and IP55 protection ratings for three-phase asynchronous motors, and how should one choose the appropriate rating?
Jun - 10 - 2026
What are the differences between the IP44, IP54, and IP55 protection ratings for three-phase asynchronous motors, and how should one choose the appropriate rating?

The protection rating of a three-phase induction motor is denoted by “IP” followed by two digits. The first digit represents the dust protection level, and the second represents the water protection level. Different protection ratings are suitable for different operating environments. Customers should select the appropriate rating based on the dust, humidity, precipitation, and corrosiveness of their specific application. Our company’s mainstream models cover the three core ratings of IP44, IP54, and IP55. The specific differences and selection recommendations are as follows:

What factors determine the pricing of Three Phase Asynchronous Motor, and are there discounts for bulk purchases?
Jun - 09 - 2026
What factors determine the pricing of Three Phase Asynchronous Motor, and are there discounts for bulk purchases?

Our Three Phase Asynchronous Motor are priced transparently and reasonably, with no hidden fees. The pricing structure primarily includes raw material costs, manufacturing and processing costs, testing and certification costs, packaging and logistics costs, and R&D costs. All pricing is based on international market conditions, offering value far exceeding industry standards. We also provide substantial discounts for bulk purchase customers, as detailed below:

What is the lead time for Three Phase Asynchronous Motor and do you offer expedited order services?
Jun - 08 - 2026
What is the lead time for Three Phase Asynchronous Motor and do you offer expedited order services?

We have established a comprehensive stock inventory system and rapid production lines specifically for our international customers. Our lead times are significantly shorter than the industry average, and we also offer expedited services for urgent orders to fully support our customers’ procurement and production needs. Specific lead times are as follows:

What do Class F and Class B insulation ratings mean for three-phase asynchronous motors, and how do they affect service life?
Jun - 05 - 2026
What do Class F and Class B insulation ratings mean for three-phase asynchronous motors, and how do they affect service life?

The insulation rating of a three-phase asynchronous motor refers to the heat resistance rating of the insulation material used in the motor windings. It determines the motor’s maximum allowable operating temperature and directly affects its overload capacity, service life, and operational stability. Standard products typically feature Class F insulation, which can be upgraded to Class H, while some basic models use Class B insulation. The specific parameters and their effects are as follows:

What are the starting methods for three-phase induction motors, and how do you choose the appropriate one?
Jun - 04 - 2026
What are the starting methods for three-phase induction motors, and how do you choose the appropriate one?

The starting method for a three-phase induction motor determines the motor’s starting current, starting torque, and the impact on the power grid and equipment. Our company supports a variety of starting methods and can recommend the optimal solution for customers based on motor power, grid capacity, and load type. The mainstream starting methods are as follows:

What is the service life of a three-phase induction motor, and how should it be maintained on a daily basis?
Jun - 03 - 2026
What is the service life of a three-phase induction motor, and how should it be maintained on a daily basis?

Under normal operating conditions, a three-phase induction motor has a service life of 10 to 15 years. With proper maintenance, this lifespan can be extended to over 20 years, far exceeding the industry average. The motor’s service life primarily depends on insulation performance, bearing quality, and daily maintenance. Daily maintenance procedures are simple and easy to perform, as outlined below:

What are the noise and vibration specifications for three-phase induction motors, and do they comply with in
Jun - 02 - 2026
What are the noise and vibration specifications for three-phase induction motors, and do they comply with in

The noise and vibration specifications of our three-phase induction motors far exceed international standards. They operate quietly and smoothly without causing noise pollution, and comply with environmental noise standards in regions such as the European Union and the Americas. The specific specifications are as follows:

What is the quality control process for three-phase asynchronous motors, and how is product quality ensured?
Jun - 01 - 2026
What is the quality control process for three-phase asynchronous motors, and how is product quality ensured?

Our company has established a rigorous end-to-end quality control system. From raw material procurement to finished product delivery, we conduct 12 quality inspection procedures in accordance with the ISO 9001 international quality management system. Every motor undergoes comprehensive testing to ensure zero-defect product quality. The quality control process is as follows:

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