3-Phase Inverter Duty Motor 5.5kW 7.5Hp

The 3-Phase Inverter Duty Motor 5.5kW 7.5Hp is a new generation electric motor combined with an inverter capable of varying input frequency and current, thereby precisely controlling rotational speed according to each load requirement. This high adaptability has quickly made the inverter duty motor a top choice in many industries, especially systems requiring high precision and stable performance.

Design Overview of the 3-Phase Inverter Duty Motor 5.5kW 7.5Hp

The 3-Phase Inverter Duty Motor 5.5kW 7.5Hp is built with a durable cast-iron frame, fully powder-coated to protect the motor against environmental influences and mechanical impacts.

At the rear, the motor integrates a specialized forced cooling fan, ensuring efficient heat dissipation when operating at low speeds or working in heavy-duty environments.

Detailed Structure of the 3-Phase Inverter Duty Motor 5.5kW 7.5Hp

The 3-Phase Inverter Duty Motor 5.5kW 7.5Hp belongs to the 3-phase electric motor category with a standard technical design, consisting of the following main components:

• Stator: The stator core uses 100% high-grade pure copper wire. The winding is repeatedly vacuum-impregnated with varnish according to Class F insulation standards. This protective layer is extremely critical, helping the copper wire withstand high temperatures (155°C) and resist damage from harmonic surges generated by the inverter.
• Rotor: Consists of multiple stacked electrical steel laminations, rotating thanks to the magnetic field generated by the stator.
• Terminal Box: Sealed with a rubber gasket meeting IP55 water-resistance standards. Inside, it is divided into two independent terminal blocks: a large block for the main motor power supply and a small block for the cooling fan power.
• Forced Cooling Fan: Provides a strong airflow, maintaining a stable temperature for the entire motor.
• Inverter Circuit: Converts AC voltage into a variable-frequency power supply, allowing precise control of speed and torque.

Classification of the 3-Phase Inverter Duty Motor 5.5kW 7.5Hp

Based on the rotational speed and load gripping force requirements of the machinery line, this product is divided into 4 pole versions. Choosing the correct number of poles directly determines the performance and lifespan of the entire system.

3-Phase Inverter Duty Motor 5.5kW 7.5Hp 2 Pole (2,800 – 3,000 rpm)

The 2-pole version stands out with an extremely fast shaft rotational speed, generating large kinetic energy. This is an ideal choice for equipment prioritizing speed over heavy load pulling capacity.

Specifications

Code	132S
Shaft Diameter	38 mm
Keyway	10 mm
Flange Diameter	300 mm
Pilot Diameter	230 mm
Frequency	5 ~ 50Hz
Dimensions	470mm * 270mm * 345mm
Mounting Type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection Class	IP55
Insulation Class	Class F

Applications:

• Providing kinetic energy for centrifugal water pumps, fire-fighting pump stations requiring high flow rates.
• Driving centrifugal exhaust fan systems, factory ventilation fans requiring high pressure.
• Used for industrial grinders, cutting machines, and saws that require fast rotation for smooth cut surfaces.

3-Phase Inverter Duty Motor 5.5kW 7.5Hp 4 Pole (1,400 – 1,500 rpm)

The 4-pole line offers a perfect balance between rotational speed and load pulling force (torque). Therefore, this is the most popular and widely applied version on the market.

Specifications

Code	132S
Shaft Diameter	38 mm
Keyway	10 mm
Flange Diameter	300 mm
Pilot Diameter	230 mm
Frequency	5 ~ 50Hz
Dimensions	470mm * 270mm * 345mm
Mounting Type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection Class	IP55
Insulation Class	Class F

Applications:

• Pulling conveyor systems and material sorting conveyor belts in factories.
• Operating food ingredient mixers, dough kneaders, plastic pellet extruders.
• Integrated into automatic production lines, industrial robots, and packaging machinery.

3-Phase Inverter Duty Motor 5.5kW 7.5Hp 6 Pole (900 – 1,000 rpm)

With a naturally slow rotational speed, the 6-pole version generates very high load pulling force. This motor is specially designed to shoulder heavy-load mechanical systems.

Specifications

Code	132M
Shaft Diameter	38 mm
Keyway	10 mm
Flange Diameter	300 mm
Pilot Diameter	230 mm
Frequency	5 ~ 50Hz
Dimensions	510mm * 270mm * 345mm
Mounting Type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection Class	IP55
Insulation Class	Class F

Applications:

• Providing pulling force for chemical agitation tanks, paints, and solvents with high viscosity.
• Installed in lifting winch systems, electric wire rope hoists, or medium-scale overhead cranes.
• Used for heavy-duty conveyor systems, stone crushers, and industrial wood chippers.

3-Phase Inverter Duty Motor 5.5kW 7.5Hp 8 Pole (700 – 750 rpm)

Super-slow speed combined with a large shaft size enables the 8-pole line to generate enormous torsional twist force. This device helps engineers simplify transmission systems, limiting the use of too many mechanical reduction stages.

Specifications

Code	160M
Shaft Diameter	42 mm
Keyway	12 mm
Flange Diameter	350 mm
Pilot Diameter	250 mm
Frequency	5 ~ 50Hz
Dimensions	615mm * 320mm * 420mm
Mounting Type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection Class	IP55
Insulation Class	Class F

Applications:

• Operating thick sludge scraper paddle systems at wastewater treatment plants.
• Applied in hydraulic presses, high-intensity rubber calenders.
• Driving seaport cranes and container lifting cranes requiring absolute stability.

Which Gearboxes Can the 3-Phase Inverter Duty Motor 5.5kW 7.5Hp Be Combined With?

To maximize pulling force and customize speed down to the lowest level, the 3-Phase Inverter Duty Motor 5.5kW 7.5Hp is often assembled with the following gearboxes and auxiliary equipment:

• Worm Gearbox: NMRV 130 worm gearbox and WPA, WPS, WPX, WPO, WPDA, WPDS, WPDX, WPDO size 155 series.
• Heavy-Duty Gearbox: R-series (inline helical), K-series (helical bevel), F-series (parallel shaft), S-series (helical worm).

Additionally, the 7.5 hp inverter motor can also be combined with:

• Pulleys and couplings: 38mm, 42mm shafts
• Brake: Brake for 5.5kW 7.5Hp motor

Instructions for Wiring a 3-Phase Inverter Duty Motor

Wiring an inverter motor requires understanding of electrical circuits, because the product possesses two separate power clusters. Correct technical wiring is a mandatory rule to prevent fire hazards and protect equipment.

Step 1: Access the Connection Cluster (Terminal Box)

• Locate the terminal box positioned on the motor body.
• Use a screwdriver to loosen and remove the 4 fixing screws at the four corners of the cover. Once open, you will see the terminal board containing the metal studs used for wire attachment.

Step 2: Secure the Power Cables to the U – V – W Terminals

• Prepare 3 phase wire ends of the 380V power supply.
• Insert the cable lugs of these 3 power wires into the 3 connection studs marked on the terminal board as: U1, V1, and W1.
• Important operation: Use pliers or a small wrench to tightly secure the nuts at these three studs. Good electrical contact will prevent the motor from arcing and ensure it operates at full capacity.

Step 3: Power On and Check Operation

• After completing the connection, supply 380V power to the system.
• Observe the movement of the motor shaft. If the motor runs smoothly, emits no strange noises, and reaches standard speed, your wiring process has been successful.

Note: This U1, V1, W1 terminal wiring method can be applied similarly when maintaining or installing gear motors or 3-phase water pumps. If you encounter difficulties in phase identification, use a multimeter to check before supplying power.

The 3-Phase Inverter Duty Motor 5.5kW 7.5Hp is the perfect drive solution for automated industries thanks to its durable copper core, precise speed regulation, and forced cooling system providing absolute anti-overheating protection. For a more visual grasp of technical operations, please watch our compiled wiring instruction videos or refer to our detailed electric motor video library. If you need drawing consultations or wholesale quotes, contact Thanh Thai Motor immediately for dedicated support.

Warranty, shipping and commitment policy at Thanh Thai Motor

Warranty up to 24 months

All electric motor products distributed by Thanh Thai Motor are covered by a genuine warranty for up to 24 months. Customers who purchase electric motors can completely rest assured with a transparent, fast, and professional after-sales policy.

Nationwide Shipping

Thanh Thai Motor supports nationwide shipping for all electric motors sold, ensuring safe and on-time delivery to every province across the country. Whether you are in the North, Central, or South, we are ready to serve you.

European Standard Quality – German Technology

Thanh Thai Motor sells electric motors manufactured with German technology, meeting European quality standards, ensuring durability, high efficiency, and stable operation for a long period – suitable for the strict requirements of industrial electric motors.

Competitive Prices – Attractive Offers for Dealers and Wholesale Customers

We commit to reasonable motor prices, offering the best electric motor products with high discount policies for bulk purchasers and distribution units. The more you buy – the better the profit.

Quality Commitment – Powerful Operation, Power Saving

Thanh Thai Motor sells electric motors wound with 100% copper wire, helping the machine run powerfully, consume less electricity, operate smoothly, and effectively reduce vibration – extending equipment lifespan. When purchasing an electric motor, prioritizing products with 100% copper core will be a wise decision, bringing long-term value.

At Thanh Thai Motor, we provide a full range of products, with various phases and capacities, such as:

• 220V electric motors (or 220V 1-Phase electric motors) are 1-Phase electric motors commonly chosen for many household appliances and light industrial equipment, offering convenience and efficiency.
• 380V electric motors are 3-Phase electric motors using three-phase power, commonly used in heavy industrial applications.

Full CO, CQ Certification Documents

Thanh Thai Motor provides the best quality electric motors. Each imported electric motor product from Thanh Thai Motor comes with a Certificate of Origin (CO) and a Certificate of Quality (CQ), meeting the requirements for large projects, constructions, and strict technical documentation.

Contact for Purchase

Do you need to buy an electric motor or seek advice on choosing an affordable electric motor that suits your needs? Contact Thanh Thai Motor immediately using the methods below:

• WhatsApp: +84966596219
• Email: codienthanhthai@gmail.com