Brushless Motor DC12V-18V Air Purifier Brushless Frequency Conversion Fan Motor

Note: For brushless DC motors, it is strictly forbidden to connect the positive and negative poles wrongly. The red wire is connected to the positive pole, and the black wire is connected to the negative pole. If the connection is reversed, the driver board will be burned.
Motor Diameter : 61MM

Motor thickness: about 25 mm

Motor shaft diameter: 8MM

Output Shaft Length: Approx. 63 MM

Weight: 280 grams

Lead wire: 6 P (wire is sent)

Cable length: about 100 mm

Steering: CW (facing the drive board)

Brand new stock external rotor brushless motor, model 48F704P840, weight is 280 grams,

The lead wire of the motor actually only uses three wires, the red wire is connected to the positive electrode, the black wire is connected to the negative electrode, the yellow wire is input with PWM signal, and the duty cycle speed is adjusted (30%-90%). Speed ​​operation.

So this batch of motors can use the simplest wiring method: the red wire and the yellow wire are connected together to the positive pole of the power supply, and the black wire is connected to the negative pole of the power supply, the motor runs normally, and it is very convenient to use.

Note: The definition of the terminals on the driver board is wrong, because the applicable voltage of this motor is DC12V-18V. If the voltage is applied to DC24V, the motor will start the protection program and make the motor unable to start. It is estimated that this board is Nidec Universal drive board, but this batch of motors is precisely the low-voltage and low-speed requirements of the customer, so Nidec uses the ready-made drive board, and then writes the voltage limit protection in the program. We don’t know the technology, these are just personal guesses That’s it.

The lead wire of this motor is 6P, in fact, only 3P is used. The red wire is positive, the black wire is GND, and the yellow wire is PWM. 30%-90%). If the yellow wire does not input a PWM signal, but is directly connected to the red wire, the motor can also run normally.

Simplest wiring method:

Positive: red wire + yellow wire

Negative: black wire

We recommend using the yellow wire as the motor’s (start/stop) signal wire, that is, when the power is turned on, the yellow wire is the slowest to conduct, and the yellow wire is first cut off when it stops.

If you need PWM speed regulation, the wiring method is as follows:

Red wire: +12V – 18V

Black wire: GND (negative pole of power supply + negative pole of PWM signal)

Yellow line: PWM signal, duty cycle speed regulation (30%-90%)

The following is to measure the speed of the motor under different duty ratios: (frequency is 1000HZ)

30% 420RPM

40% 560RPM

50% 690RPM

60% 815 RPM

70% 930RPM

80% 1040RPM

90% 1100RPM

This batch of motors is designed as a low-speed, high-torque brushless motor. Its maximum speed is 1100 rpm. The speed of DC12V and DC18V is the same, but please note that the maximum voltage should not exceed DC18V. If it exceeds, the motor will start the protection program. Make the motor unable to start.