BLD series driver bld 70B
Bldc controller 12V, Bldc controller 24V. 70W Bldc driver.

BLD-70B BLDC fan speed control

Features:

Bldc controller 12V, Bldc controller 24V, Bldc 3 phase motor controller, Bldc fan driver,Bldc gate driver
Suitable for 10-70W Bldc motor
4 speed regulation modes
Open-loop and closed loop control of bldc motor are optional
Torque holding function when motor locked
Support output power adjustable(Customization service)
Support Modbus communication protocol(Extended functionality)

Specification

BLD-70B BLDC motor driver is a high-performance brushless driver for 10W to 70W BLDC motor. The driver can also be extended to support Modbus communication protocol, providing users with more flexible choices in practical applications.

Electrical parameters

Parameter<	Min.	Typical	Max
Input Voltage DC (V)	12	24	30
Peak Current (A)	2	4.2	4.5

Environmental indicators

Heat Sinking Method	Natural cooling or forced cooling
Occasions	avoid dust, oil and corrosive gases
Operating Temperature	-20C~+55C
Storage Temperature	-30C~+70C

Bldc driver dimension

Interface and Port

Bld-70B interface

Port signal description

Signal	Terminal	Function
Power supply	DC-	Power supply –
Power supply	24V	Power supply + 12V~24V
Motor lines	U	Motor line U phase
	V	Motor line V phase
	W	Motor line W phase
Hall Signal	GND	Hall sensor signal ground electrode
	HW	Hall sensor signal HW
	HV	Hall sensor signal HV
	HU	Hall sensor signal HU
	+5V	Hall sensor signal power supply+
Control Signal	SV	1>External potentiometer 2>External analog signal input 3>PWM pulse signal speed regulation
	BRK	BRK and GND disconnect, the motor runs, otherwise motor brakes to stop
	F/R	F/R disconnected with GND, motor rotates CW, otherwise motor rotates CCW
	GND	Ground
	NC	Reserved port (input signal)

Function setting

1.Brake
BRK and GND terminals can control the natural operation and rapid stop of the motor. When connecting the BRK and GND, the motor stops quickly. Otherwise, the motor runs.
Tips:By connecting a switch between GND and BRK or using PLC can control run and rapid stop.When the alarm red light is on, connect GND and BRK to reset the alarm .

2.Direction control
F/R and COM disconnect, motor runs clockwise(CW). F/R and COM connect, motor runs anticlockwise(CCW).

3.Closed loop selection
SW1=0, SW2=0 Open loop
SW1=0, SW2=1 Closed loop 4poles
SW1=1, SW2=0 Closed loop 8poles
SW1=1, SW2=1 Closed loop 10poles
Note: Under closed loop mode, the max speed value is 3000rpm by default.

4.P-SV current setting
Standard product factory setting is 70W, non adjustable. If you need set output current, please contact us.

5 Stalling torque holding
When the load suddenly rises, the motor would be locked. When the motor is locked, the torque will be maintained for 5s.
If the reason for the restriction of the rotor is solved within 5 seconds, the motor can rotate again. If not, the motor will stop and report 8times RED alarms.
Note: If users want to restart the motor after stalling alarms, the user needs to remove the obstacle and send a reset signal at the same time.

Speed regulation

BLD-70B has 4 speed regulation mode as following.
1.Via built-in potentiometer
Motor speed is increase when RV knobs is rotated clockwise, when anticlockwise, motor speed decreases.

2.Via external potentiometer
Use a suitable potentiometer with a resistance value of 10kΩ .When connect external potentiometer, the middle terminal connects to SV, the other two terminals connect to +5V and GND.

3.External analog signal 0-5VDC
Put an analog signal 0-5V between SV and GND.The motor speed changes with the variation of voltage.
Note: When use external analog signal, the built-in potentiometer RV should be rotated anticlockwise to limit position.

4.BLDC PWM control
PWM signal is recommended high level 5V, low level 0V, frequency 3kHz (recommended range 3K ~ 15K Hz). The recommended speed range is duty ratio 5%-96%. The following is a measured example.