BL76 76mm Diameter Brushless Dc Motor- Suzhou Retek Electric Technology Co., Ltd.

The High Power Density 76mm BLDC Motor Solution

The 76mm diameter BLDC motor (often equivalent to NEMA 30/34 frame) is engineered for higher power and torque applications than its 57mm counterpart, offering continuous outputs typically ranging from 300W to 1kW.

The larger stator size accommodates substantial copper volume, enabling high current handling at voltages often up to 150VDC or 310VDC. The design prioritizes thermal robustness; the larger housing diameter provides an excellent surface area for passive or forced convection cooling, essential for managing the heat associated with kilowatt output. These motors are the workhorse for demanding industrial tasks that require precise speed regulation under varying, heavy loads.

Introduction

Detailed Parameters and Performance Data

RETEK: Building Robust Power for Industrial Machinery

Suzhou Retek Electric Technology Co., Ltd. designs the BL76 series to fill the critical gap between small actuators and very large industrial drives. Our focus for this size is maximizing continuous output power and ensuring mechanical rigidity, crucial for heavy-duty drive systems. The BL76 is often specified in systems that require long-term, high-duty-cycle operation, such as automated guided vehicles, large pumps, and factory process equipment. We use heavy-duty ball bearings and reinforced end-bells to withstand high radial shaft loads.

Applications

Advanced Technology Highlights

High-Demand Applications for BL76 (76mm) BLDC Motors

Medium-Sized AGVs and Material Transport: Primary drive wheel motors requiring high torque density and efficiency from battery power. Challenge: Managing high current spikes during acceleration and braking.
Large Conveyor and Palletizing Systems: Actuators for heavy-load indexing and positioning.
Industrial Pumps and Fans: Motors for liquid transfer and continuous air circulation in process environments.
CNC Equipment Feed Axes: Providing high response and stiffness for milling and routing machine feed mechanisms.

Technical Specifications

Industrial & Commercial Usage

Technical Parameters (BL76 Series)

Parameter	Range / Typical Value	Unit
Outer Diameter	76	mm
Nominal Voltage Range	48 to 310	VDC
Rated Continuous Power	300 to 1,000	W
Inertia Ratio	Optimized for Load Match	Factor
Continuous Torque	0.7 to 3.0	Nm
Insulation Class	F (Standard)	Rating

Additional Information

Supplementary Details & Notes

Integrated Production and Customization Workflow

The BL76 production process includes precise rotor stacking and automated magnetization to achieve maximum flux density. Final acceptance testing involves full load dynamometer runs to verify torque, speed, and thermal stability against the continuous rating.

Shaft Modification: Providing custom double-extension shafts for through-drive applications or integrating specific coupling mechanisms.
High Voltage Winding: Customizing the winding for specific high-voltage DC bus requirements (e.g., 170VDC, 270VDC) common in specific industrial control cabinets.
Brake Integration: Factory mounting and wiring of spring-applied, electromagnetically released safety brakes, pre-configured for client specifications.
IP Rating Upgrades: Enhancing sealing materials (gaskets, seals, potting) to achieve IP66 or IP67 ratings for use in environments exposed to moisture or particulates.

Service & Support

Technical Advantages and Core Design Features

High Thermal Capacity: The increased surface area and internal thermal pathways are engineered to manage higher continuous current and power output with a stable operating temperature.
High Voltage Compatibility: Design supports rectified AC mains voltage (310VDC bus) to minimize current draw and associated losses for kilowatt operation.
Low Vibration Performance: Precision machining of the housing and dynamic balancing minimizes mechanical run-out, essential for coupling to high-speed reduction gearboxes.
Integrated Brake Option: Easily integrated electromagnetic holding brakes are available for vertical axis or safe parking applications.
Robust Terminal Box: Utilizes a protected terminal box or industrial connectors (e.g., M23) for reliable, long-term power and signal connections in harsh environments.

Frequently Asked Questions

Common Inquiries Regarding BL76 Motors

Q: What is the recommended method for thermal management in the 1kW range for the BL76?
A: For continuous operation near 1kW, we strongly recommend external forced air cooling (via a fan unit) or mounting the motor directly to a large metallic machine frame acting as a heat sink.

Q: Can the BL76 motor be customized with a gearhead?
A: Yes. The BL76 is mechanically compatible with a variety of planetary gearheads and spur gearboxes, allowing the system designer to achieve precise speed and torque ratios. We provide custom output shaft dimensions to ensure perfect fit.

Q: How is commutation accuracy maintained at high speed and high power?
A: We utilize high-resolution magnetic or optical encoders (up to 2500 lines) for precise commutation feedback, ensuring the drive aligns the current vector accurately with the rotor position, maximizing torque efficiency.

Resources

Advanced Material Selection Guide

Housing: Heavy-gauge, ribbed aluminum casting for enhanced rigidity and heat dissipation. Some high-power variants may include steel shells for increased durability.

Winding Insulation: Class F or Class H wire insulation, often VPI treated, to withstand the thermal stress from 1kW continuous operation.

Bearings: Use heavy-duty, permanently lubricated ball bearings (C3 clearance) specified for high radial load capacity, suitable for belt- or gear-driven systems.

About Suzhou Retek Electric Technology Co., Ltd.

Unlike other motor suppliers, Retek engineering system prevents the selling of our motors and components by catalogue as every model is customized for our customers. The customers are assured that every component they receive from Retek is designed with their exact specifications in mind. Our total solutions are a combination of our innovation and a close working partnership with our customers and suppliers.

As China BL76 76mm Diameter Brushless Dc Motor Manufacturers and Wholesale BL76 76mm Diameter Brushless Dc Motor OEM/ODM Suppliers, Retek business consists of three platforms: Motors, Die-Casting and CNC manufacturing and wire harness. Retek products are widely supplied for residential fans, vents, boats, airplanes, medical facilities, laboratory facilities, trucks and other automotive machines.

Welcome to send us an RFQ, it is believed you will get the best cost-effective products and services here!

Customized Solutions

Quality Assurance

Global Export

Suzhou Retek Electric Technology Co., Ltd.

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