18-50V 300W BLD-300B Brushless DC motor driver with closed-loop and PWM control

Brief introduction

BLD-300B is designed by Changzhou Bextreme Shell motor technology and mainly for BLDC motors

( 48v: 440w /24V:300w)

Features:

Acc/Dec time setting

Alarm indication

Peak current setting

Pole-pairs selection

Open/closed loop control

External potentiometer speed setting

Max output current P-sv setting

External analog signal speed setting

PWM speed setting

Electrical Performance

Driver parameter Min Value Typical Value Max Value

Voltage input DC (V): 12 ,24V,36V,48V ,56

Current output(A) : 15

Motor speed range(rpm) : 20000

Hall signal voltage(V) : 5

Hall drive current (mA): 12

External potentiometer(KΩ) : 10

Dimension (Unit: mm)

Function setting

1. Motor poles pair selection

SW1 is for motor poles pair selection to match different

BLDC motor. ON=2P; OFF=4P

2. Open/Closed loop setting

SW2 ON=Closed loop setting; SW2 OFF=Open loop setting

3. Peak current setting

Use P-sv to set the output peak current. When load is increased suddenly, the output

current will be limited by the setting value, which reduces motor speed and protects the

motor. Current setting ranges: 3-15A. Please set as the right.

As the admissible error of real current and setting value is ±10%, to ensure safety, set

current lower accordingly.

4. ACC/DEC time setting

Set acceleration time and deceleration time by ACC/DEC, range is 0.3-15s. Acceleration

time is time needed from 0 to rated speed. Deceleration time is time needed from rated

speed to 0.

Port signal description

Signal category

Terminal Functional Description

Control signal

BRK:Motor brake stop control signal; BRK and COM connect in default,

motor brake stops when BRK and COM disconnect.

EN:Stop signal terminal;EN connects COM, motor runs, otherwise

motor stops.

F/R:Motor direction control terminal; F/R and COM disconnect, motor

will rotates clockwise, and otherwise, motor will rotate

anticlockwise.

COM:Common port(GND)

SV

① External potentiometer speed setting input;

② External analog voltage input terminal

③ PWM speed setting input

Hall signal

REF+ Hall sensor signal power supply+

HU Hall sensor signal Hu

HV Hall sensor signal Hv

HW Hall sensor signal Hw

REF- Hall sensor signal-

Motor connection

W Motor line W phase

V Motor line V phase

V Motor line U phase

Powerconnection

DC+ Power supply positive electrode (18-50VDC)

DC- Power supply negative electrode (Hall sensor negative electrode)

Outputsignal

SPEED Outputpulse frequency corresponded with running speed. Speedcan be figured out

according:

N(rpm)= (F/P)×60/3

F:Output pulse frequency P: Motor pole pairs N: Motor speed

For example: Motor has 4 pole pairs,

F=1sec/2ms=500Hz

N(rpm)=(500/4)×60/3=2500

ALM:Motor or driver fault signal output. It is 5v in normal situation and

0V when faultoccurs.

Driver interface and wiring diagram

Speed setting methods and setting

1. Speed setting via built-in potentiometer

Motor speed increases when RV knobs is rotated clockwise, when anticlockwise, motor

speed decreases.

2. Speed setting 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

REF+ and COM.

Notice: 1. RV should be rotated anticlockwise to limit position.

3. Speed setting via external analog signal 0-5V

The analog signal voltage can be 0 ～ 5VDC; when the voltage is 0.2VDC, the motor

speed reaches 4% of fastest speed; when the voltage is 5 VDC, the motor speed reaches

maximum value, which depends on the motor specification and power voltage.

4.PWM Speed setting (5V PWM, 1-3KHz)

When duty ratio of pulse is 4%, motor speed is 4% of max speed, when duty ratio is 100%,

motor reaches max speed. The max speed also depends on the motor specification and

power voltage.