RACB Motor RACB Motor

Motor Speed Controller, DC 5V-36V 3-Phase Brushless Motor Speed Control CW CCW Reversible Switch

Product Description

Governor Specifications and Wiring Diagram

1. Electrical Performance Specifications of Governor

Voltage Range DC 5V - 28V
Rated Current MAX 2A (To control motors with greater current, the motor power line must be connected directly to the power supply, not through the governor)
PWM Output Frequency 0 ~ 100KHz
Analog Voltage Output 0 - 5V
Working Temperature -10°C to 70°C
Storage Temperature -30°C to 125°C
Driver Board Size Length 60mm X Width 40mm

2. Governor Wiring and Internal Function Description

1
Governor, motor power supply positive input.
2
Governor, motor power input negative.
3
The positive output of the power supply of the motor.
4
Negative output of the power supply of the motor.
5
High and low level output of positive and negative rotation control. High level 5V, low level 0V, controlled by touch switch 2 (F/R), default is high level.
6
High and low level output of brake control. High level 5V, low level 0V, controlled by touch switch 1 (BRA), power on defaults to high level.
7
Analog voltage output (0~5V). This interface is suitable for accepting analog voltage speed regulation motor.
8
PWM1 reverse output. This interface is suitable for motors that accept PWM speed regulation, and the speed is inversely proportional to the duty cycle.
9
PWM2 forward output. This interface is suitable for motors that accept PWM speed regulation, and the speed is proportional to the duty cycle.
10
Motor feedback signal input.
Wiring Signal & Jumper Settings

Signal Adjustments: The output signal changes of the three interfaces (5 to 9) are adjusted by the potentiometer.
Feedback Jumpers: FG/FG*3 should be configured based on the actual motor feedback times. Without a jumper cap is a single times FG; with an added jumper cap is 3 times FG*3. The same logic applies for CW/CCW configurations.

3. Governor Parameter Settings

  • Frequency Setting: Press and hold touch switch 1 before power-on. Power the governor board and wait until the screen displays "FEQ:20K" before releasing the button. Touch switch 1 to decrease and touch switch 2 to increase the frequency. Adjustable to specified frequency; factory default is 20KHz.
  • Number of Poles Setting: Press and hold both touch switch 1 and touch switch 2 before power-on. Power the governor board and wait until the screen displays "number of poles: 1 polarity" before releasing the buttons. Touch switch 1 to decrease and touch switch 2 to increase. Set according to the motor's designed pole number; factory default is 1 pole.
  • Feedback Setting: The FG/FG*3 pin is used to set the feedback multiple. Configure according to whether the feedback multiplier of the motor is single times FG or three times FG. Adding the jumper cap sets it to 3 times FG, while omitting the jumper cap sets it to single times FG.
  • Direction Setting: The CW/CCW pin configures the direction of the motor in its initial state when the direction control line is suspended. Add a jumper cap for CCW; leave without a jumper cap for CW.
  • Main Screen Display: The primary screen displays the input voltage, speed, frequency, and duty cycle. To display the speed correctly, the feedback multiplier (FG/FG*3) and the number of poles must be configured.

4. Governor Precautions

Important Warnings:
  • The positive and negative power supply of the governor must be connected exactly in accordance with the instructions. Do not reverse connections, or the governor will fail to work and will burn out.
  • The governor must only be matched with motors that match the control interface specifications detailed above.
  • The five ports designated as 5 through 9 must never access a voltage exceeding 5V.
Frequently Asked Questions (FAQ)
Q What is the voltage and current limit for this governor?

The governor operates within a voltage range of DC 5V-28V with a maximum rated current of 2A. If your motor requires a higher current, the motor power line must be connected directly to the power supply instead of through the governor.

Q How do I adjust the PWM frequency settings?

Before powering on, hold down touch switch 1. Turn on the power, release the button when "FEQ:20K" appears on the screen, and use touch switch 1 to decrease or touch switch 2 to increase the frequency. The factory default is 20KHz.

Q How do I set the number of poles for my motor?

Hold down both touch switch 1 and 2 simultaneously before powering on. Once powered, release the buttons when the screen displays "number of poles: 1 polarity". Use touch switch 1 to decrease and touch switch 2 to increase the pole settings.

Q What is the purpose of the FG/FG*3 jumper setting?

It configures the feedback multiplier of the motor. Leaving the jumper cap off sets the governor to single times FG feedback, whereas adding the jumper cap changes the feedback setting to three times FG (FG*3).

Q Can I connect voltages higher than 5V to the control ports?

No. The five control ports (numbered 5 to 9 in the wiring description) must not access any voltage exceeding 5V. Exceeding this limit can damage the control board interfaces.

Q What happens if the positive and negative power supply connections are reversed?

The positive and negative power supply connections must be strictly adhered to. Reversing the input polarity will prevent the unit from functioning and will permanently burn the governor.

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