Description
Small Brushless DC motor Description
High quality 5000 rpm brushless DC motor with low cost, small size, 20W power, providing 36.7 mN.m rated torque, high-temperature resistance, strong load capacity, sturdy and durable, 12 volt, 24 volt voltage for selection.
5000 rpm High Speed BLDC Motor Specifications
| Basics | Model | ATO-4255-50 | |
| Type | Micro Brushless DC Motor | ||
| Weight | 210g | ||
| Size | D:42mm, L:55mm | ||
| Usage | Boat, Car, Electric Bicycle, Home Appliance, Industrial Equiment | ||
| Technical Parameters | Number of Phase | 3 phase | |
| Number of Pole | 4 pole | ||
| Rated Power | 20W | ||
| Rated Voltage | 12V DC | 24V DC | |
| Rated Current | 1.8A | 0.9A | |
| No-load Current | 0.27A | 0.13A | |
| Rated Speed | 3900 rpm | ||
| No-load Speed | 5000 rpm | ||
| Rated Torque | 36.7 mN.m | ||
| Construction | Permanent Magnet | ||
| Bearing | NMB Ball Bearing | ||
| Efficiency | 90% | ||
| Motor Housing | Stainless steel | ||
| Insulation Class | Class B | ||
| Protect Feature | Explosion-proof | ||
| Wiring Diagram | Pin 1 | Red | +5V |
| Pin 2 | Purple | Hall A | |
| Pin 3 | Green | Hall B | |
| Pin 4 | Grey | Hall C | |
| Pin 5 | Black | GND | |
| Pin 6 | Yellow | Phase A | |
| Pin 7 | Blue | Phase B | |
| Pin 8 | White | Phase C | |
| Click to see the matched controller specs |
12V/24V Small BLDC Motor Dimension
Details
Tips: Starting Mode of Mini BLDC Motor
Why can’t a mini brushless DC motor start directly? The motor would produce dangerous sparks at the moment of starting, the sparks burn out the commutator and damage the winding, but also cause large fluctuations in the grid voltage, thus leading to accidents.
1. Resistance and inductance of BLDC motor’s armature loop are small, while the rotor has certain mechanical inertia, so when the BLDC motor is powered on, the armature speed and corresponding back electromotive force are small at the initial stage of starting, the starting current is quite large, which could be 15~20 times of rated current. This current may disturb the power grid, impose mechanical impact to the generator sets and cause sparks at the commutator. Therefore, direct starting is only applicable for the motor below 4KW.
2. Start mode of the DC motor includes direct switching-in starting, series resistance starting and voltage drop starting.
3. In order to restrain the starting current, starting control of brushless DC motor is generally voltage drop starting method or series resistance starting method. For example, the city tram starts frequently, to simplify equipment, reduce weight and facilitate operation and maintenance, series resistance starting method is commonly used.
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