Low Voltage Brushless DC Motors (24VDC)- Suzhou Retek Electric Technology Co., Ltd.

Optimizing Power Delivery in the 24VDC Safety Standard

The 24VDC standard is prevalent due to its classification as Safety Extra Low Voltage (SELV) and its compatibility with battery systems.

The challenge in the 24VDC domain is efficiently handling high current. Our motor design addresses this by employing windings with extremely low resistance (milliohms), requiring thicker copper wire and high-precision coil placement to maximize the cross-sectional area. The magnetic circuit is highly saturated to produce maximum torque from the limited voltage. For high-power 24V applications (e.g., 3kW axial fan motors), the driver and motor are engineered as a single thermal unit to manage the significant I2R heat loss, which is inherently higher at low voltage and high current.

The BL112 Low Cogging Effect series highlights an optimization for smooth, low-speed maneuvers typical in battery-powered automation.

Introduction

Detailed Parameters and Performance Data

RETEK: The 24VDC Industrial Power Platform Specialist

Suzhou Retek Electric Technology Co., Ltd. provides robust, high-current management solutions within the 24VDC framework, serving crucial logistics, mobile machinery, and renewable energy storage applications. Our motors are rigorously tested for performance over the typical 20V to 30V range expected from charging/discharging batteries. We focus on maximizing run-time and minimizing energy consumption by achieving peak efficiencies that reduce the load on the power source, extending the operational period of electric forklifts (BL100 series) and industrial pump systems.

Applications

Advanced Technology Highlights

24VDC Specific Application Environments

Electric Forklifts and Pallet Jacks: Drive and lift motors requiring high transient torque for starting under load and efficient cruising (e.g., BL100, 300W series). Challenge: High shock and vibration immunity.
Water and Submersible Pumps: DC pumps for wells, pools, or marine applications running directly off batteries or solar panels. Challenge: Requires exceptional sealing (IP68) and corrosion-resistant materials.
Mobile Autonomous Systems: The primary drive train for AGVs and large wheeled service robots. Challenge: Must handle regenerative braking energy back into the battery safely.
Industrial Axial Fans (High Power): Low voltage, high power (e.g., 3kW) fans for ventilation in mines or large industrial enclosures where safety standards prohibit high voltage.

Technical Specifications

Industrial & Commercial Usage

Technical Parameters

Parameter	Range / Typical Value	Unit
Nominal Input Voltage	24	VDC
Winding Resistance (Rw)	<50	m Ω
Torque Constant (KT)	High, KV Low	Nm/A
Low Cogging Effect Series	<2% of Rated Torque	Ripple
Insulation Class	F (Standard)	Rating
Max Operating Current	Up to 150	A

Additional Information

Supplementary Details & Notes

Integrated Production and Customization Workflow

Our production process includes mandatory high-current life cycle testing to validate thermal stability under maximum load. We ensure all terminal connections are ultrasonically welded or crimped with industrial-grade tooling to prevent high-resistance contacts at high currents.

Custom Winding: Offering precise winding adjustments to tailor the KV curve for specific battery voltage ranges (e.g., 24V nominal but optimized for 22V minimum).
IP Rating and Coating: Providing specialized conformal coatings for electronics and sealed cable entry points for motors used in environments with condensation or water exposure.
Interface Standardization: Customizing the mounting flange and shaft dimensions (e.g., keyway, spline) to directly interface with common industrial gearboxes and coupling types.
Encoder Integration: Integrating robust, industrial-grade incremental or absolute encoders with high signal noise immunity for reliable position feedback in noisy 24V systems.

Service & Support

Technical Advantages and Core Design Features

Ultra-Low Winding Resistance: Achieved by using heavy gauge copper, minimizing I2R losses and maximizing voltage available to generate torque from the 24V source.
Maximized Flux Density: Design uses large-volume Neodymium magnets and a reduced air gap to produce the highest possible magnetic force from the limited terminal voltage.
Low Cogging Technology: The BL112 series uses specific fractional slot/pole combinations and magnet skewing to reduce parasitic torque ripple, facilitating smooth low-speed control.
Safety and Compliance: Adherence to the SELV standard simplifies certification and integration for equipment deployed in public or sensitive areas.
Regenerative Braking Capability: Motor design is compatible with controllers designed to safely return kinetic energy to the 24V battery during deceleration.

Frequently Asked Questions

Common Inquiries Regarding 24VDC BLDC Motors

Q: How do you select the correct cable size for a high-power 24V motor?
A: Cable sizing is critical for 24V systems. For a 3kW, 125A motor, the cable must be sized not only for the current but also to minimize voltage drop (ΔV). A ΔV greater than 2% of the nominal voltage can significantly impair performance. We provide a detailed cable loss calculator.

Q: What is the benefit of low cogging torque in mobile robotics?
A: Low cogging torque ensures the motor can start smoothly and move slowly without "jumping" between magnetic poles. This is essential for precise docking, fine positioning, and extending battery life at cruising speeds.

Q: Are the controllers for 24V high-power motors generally different?
A: Yes. 24V high-power controllers require MOSFETs with extremely low on-resistance (RDSon) to handle the high current without excessive heat generation, making them physically larger and more thermally robust than low-current controllers.

Resources

Advanced Material Selection Guide

Magnets: High-performance, large-volume NdFeB magnets are used to ensure maximum torque from the limited operating voltage. Magnet grade is selected to match the motor's operating temperature envelope.

Bearings: Use heavy-duty, double-shielded bearings with high dynamic load ratings to handle the loads from the high torque output, especially in wheeled or driven applications.

Housing: Thick-walled aluminum housing provides necessary mechanical strength and a large thermal mass for heat absorption from the high-current components.

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 Low Voltage Brushless DC Motors (24VDC) Manufacturers and Wholesale Low Voltage Brushless DC Motors (24VDC) 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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