28mm Geared Brushless DC Motor
The 28mm geared BLDC motors have a frame size of Φ28mm, consisting of an 28mm economy planetary gearbox and a round 28mm brushless dc motor. They are available in 2 standard models with a gear ratio from 3.7:1 to 139:1. By combining the advantages of brushless technology, these motors ensure efficient and durable performance, while their variable gear ratios make them versatile and suitable for a broad array of applications.
- Fast Delievery
- Quality Assurance
Customization Available
Product Introduction
Mechanical Dimension
General Specification
| Winding Type | star |
| Hall Effect Angle | 120°(Electrical Angle) |
| Shaft Axial Play | 0.025mm |
| Ambient Temperature | 0℃-+50℃(Without Condensation)) |
| Ambient Humidity | ＜85% (Without Condensation) |
| Max. Radial Force | 25N |
| Max. Axial Force | 10N |
| Insulation Class | class B |
| Dielectric Strength | one minute@500VAC.5mA |
| Insulation Resistance | 100MΩ Min.@500VDC |
Electric Connection
| Lead NO. | Lead Color | Lead Gauge | Connection |
| 1 | Red | UL1007/26AWG | VCC |
| 2 | Black | GND | |
| 3 | Yellow | HALL A | |
| 4 | White | HALL B | |
| 5 | Blue | HALL C | |
| 6 | Orange | UL1007/22AWG | Phase U |
| 7 | Green | Phase V | |
| 8 | Brown | Phase W |
Gearbox Parameter
| Stage | 1 stage | 2 stage | 3 stage | |||||
| Ratio | 3.7 | 5.2 | 19 | 27 | 71 | 100 | 139 | |
| Length L1 | mm | 28 | 35.5 | 42.5 | ||||
| Length L2 | mm | 28 | 35.5 | 42.5 | ||||
| Rated load | Nm | 0.5 | 1 | 1.5 | ||||
| Max load | Nm | 1 | 2 | 3 | ||||
| Efficiency η | % | 85% | 75% | 65% | ||||
| Backlash | ° | ≤ 1° | ≤ 2° | ≤3° | ||||
| Weight | KG | 0.3 | 0.35 | 0.4 | ||||
| Running environment temperature | ℃ | -20℃~90℃ （Low temperature customizable) | ||||||
| Nominal Input Speed n1N | rpm | 3000 | ||||||
| Max. input speed n1B | rpm | 5000 | ||||||
| Degree of gearbox protection | IP | 54 | ||||||
| Lubrication | Life grease lubrication | |||||||
| Noise | dB | 50dB/1m | ||||||
| Service Life | hr | ~5000 | ||||||
Motor Technical Specification
| Model No. | Back EMF Constant | Rated Voltage | Speed | Rated Torque | Power | Rated Current | No-load Speed | No-load Current | Resistance/line-line | Inductance/line-line | Length |
| V/krpm | VDC | rpm | N.m | W | A | rpm | A | Ω | mH | mm | |
| 30BL02502-0026-XXX | 2.2 | 24 | 5000 | 0.011 | 6 | 0.5 | 7700 | 0.1 | 11.2 | 8.7 | 41 |
| 30BL01152-0004-XXX | 3.4 | 12 | 1500 | 0.025 | 4 | 0.7 | 3200 | 0.1 | 6 | 6.7 | 56 |
Remark: Customers only need to provide the speed and torque of the finally completed motor, and we will choose the suitable motor and gearbox for your application.
FAQ
Q: Can geared BLDC motors be used in precision positioning applications?
A: Yes, geared BLDC motors are well-suited for precision positioning applications. Their combination of precision, high torque, and the ability to operate in a closed-loop system makes them ideal for tasks that demand accurate and controlled movement. Whether it's in robotics, CNC machinery, or automated instrumentation, geared BLDC motors excel in maintaining precise positions, ensuring that critical tasks are performed with exceptional accuracy and repeatability.
Q: What is the impact of the gear ratio on motor efficiency?
A: The gear ratio significantly affects motor efficiency. Higher gear ratios, which reduce the motor's output speed while increasing torque, tend to improve efficiency at the cost of speed. In contrast, lower gear ratios favor higher speeds but may lead to a decrease in efficiency, as more mechanical losses occur. Therefore, selecting the right gear ratio is crucial to balance speed and torque, optimizing motor efficiency for specific applications while minimizing energy consumption.
Q: Are there any noise and vibration issues with geared BLDC motors?
A: Geared BLDC motors can encounter noise and vibration issues, particularly at higher speeds and loads. The noise originates from gear interactions and mechanical components and the vibration arises due to imbalances and misalignments. To mitigate these issues, precision engineering, proper gear lubrication, and well-designed mounting and isolation systems are essential. Moreover, selecting suitable gear designs, materials, and enclosures can help minimize noise and vibrations, making geared BLDC motors more suitable for noise-sensitive applications.
Q: What is the role of a gear reduction system in a geared BLDC motor?
A: A gear reduction system in a geared BLDC motor serves to decrease the motor's output speed while increasing torque. It amplifies the motor's ability to deliver higher torque for applications requiring force, all while controlling speed. This gear reduction system is pivotal in achieving the desired performance characteristics, allowing geared BLDC motors to handle tasks that necessitate precise control over torque and velocity, like robotics and automation.
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