preface

High-speed brushless motors were first used in hair dryers, and the high-speed running fans bring strong airflow and dry hair quickly. The built-in motor power supply voltage of the hair dryer is 310V DC, and the supporting driver is very large. Due to power supply and size, it is completely unrealizable, so the high-speed brushless motor is carried and used with you.

In order to take advantage of the advantages of the high-speed brushless motor as a fan, DIY enthusiasts use the method of rewinding the stator coil with the brushless ESC, so that the high-speed brushless motor can be compatible with 2 strings of lithium battery power supply. However, this method is not only time-consuming and laborious in the modification process, but also has poor integrity and is inconvenient to use.

Shenzhen Yufanwei has launched a 130,000-rpm high-speed brushless motor solution, which adopts the integrated design of the driver board and the brushless motor, with high integration and small size. The driver board supports 2 strings of lithium battery power supply, the maximum working current is 30A, and supports PWM speed regulation and voltage speed regulation.

The driver board also supports motor stall protection, overheating protection of the driver board, and is suitable for most low-voltage and high-speed motors on the market. Yufan micro brushless motor solution has the advantages of high efficiency and high integration, is very convenient to use, can adapt to a variety of brushless motor application scenarios, and has significant cost advantages, let's take a look at this 130,000 rpm high-speed brushless motor solution.

Yufan micro 130,000 rpm high-speed brushless motor scheme appearance

Yufanwei 130,000 rpm high-speed brushless motor scheme is the driver board and the drive board + motor as a whole, which can be selected according to the actual shipment, and the overall brushless motor scheme is introduced first.

Close-up of the impeller of Yufan micro brushless motor scheme, which is made of aluminum alloy and has 13 fan blades.

Weld the connection to the drive board at the rear of the motor.

The overall length of the measured motor with the driver board is about 50mm.

The diameter of the motor is about 28.8mm.

The drive board is connected with the stator coil of the motor by pin header welding.

Analysis of Yufan Micro 130,000 rpm high-speed brushless motor

The front of the 130,000-rpm brushless motor driver board is equipped with six MOS tubes for motor drive, MLCC filter capacitors on the left side, LDO on the top to power the MCU, and thermistor on the right side for temperature protection.

On the other side, there is a main control MCU and corresponding peripheral devices.

Using vernier calipers, the diameter of the driver board is about 17.2mm.

The thickness of the driver board is measured to be about 4mm.

Close-up of the main control MCU, built-in Yufan Micro independent drive algorithm, has good adaptability to mainstream motors, and has stalled rotor protection and temperature protection, and integrates motor operation control and NMOS driver, without additional half-bridge drivers, simplified components, and saves volume.

Close-up of LDO used to supply regulated power to the main MCU, silkscreen LR8341.

NMOS silkscreen 3001AL for motor drives.

Another three MOS tubes of the same type are close-up, and six form a half-bridge for motor drive.

Thermistors are used to detect the temperature of the MOS tube and provide overtemperature protection.

Yufan Micro 130,000 rpm high-speed brushless motor scheme rated parameters and functions at a glance, the motor is suitable for 2 strings of lithium battery applications, with power batteries to meet the demand for high current, can give full play to the performance of the motor. Compared with the traditional solution of separating the drive board and the motor, Yufan Micro sets the drive board at the tail of the motor, which can dissipate heat from the drive board with the help of air flow, with greater output power and longer duration. And a thermistor is provided on the driver board for overheating protection.

Yufan micro brushless motor solutions can provide drive boards and finished motors to meet a variety of customer needs. The built-in Yufan micro autonomous drive algorithm of the driver board has good compatibility with mainstream motors. The installation method of the driver board welded to the rear of the motor is more concise than the external driver board, and can better dissipate heat.

Summary of the charging head network

With the advantage of high speed, the high-speed brushless motor can provide large air volume and high air pressure, and the powerful advantage expands the use, which has not only been widely used in hair dryers, but also has been widely used in outdoor violent small fans. Through the combination of power battery and high-speed brushless fan, it has created a new way of use and brought excellent user experience.

The 130,000 rpm high-speed brushless motor launched by Yufan Micro supports the use of 2 strings of power lithium batteries for power supply, supports the use of PWM and voltage speed regulation, and can be easily controlled by MCU. Both the brushless motor driver board and the brushless motor complete machine offer significant cost advantages, stable supply, and reliable design, making them ideal for handheld high-speed fans and blowers.