(BLDC) Brushless DC Motor Driver Circuit using 555 IC

Overview: Brushless DC Motor Driver Circuit using 555 IC
In this project we will make
BLDC, Brushless DC Motor Driver Circuit
using
555 Timer IC
and
DRV10866 driver IC
. Brushless motors find applications in computer peripherals like disk drives, printers, hand-held power tools, aircraft, automobiles &
drones
The
BLDC control
usually requires rotor position information for selecting the appropriate
commutation angle
. So for this, we use
Driver Circuit
. In most of the applications,
Hall Effects Sensors
are used but here we will use Circuit Based on 555 Timer &
DRV10866 driver IC
.Earlier we build PWM Based
DC Motor Speed Controller
circuit using 555 Timer.
Bill of Materials
Following are the components required for making this project. All the components can be easily purchased from Amazon.
S.N.
Components
Description
Quantity

Resistor
10 K Ω

Resistor
100 K Ω

Resistor
3.8 K Ω

Variable Resistor
5 K Ω

Capacitor
10 nF (Ceramic Disc)

Capacitor
0.1uF (Ceramic Disc)

Capacitor
2.2uF (Ceramic Disc)

NE555
555 Timer IC

BAT41
Schottky Diode

DRV10866
DRV10866, 3 phase BLDC Motor Driver

5V Power Supply
Battery/DC Adapter

BLDC, Brushless DC Motor
A
brushless DC electric motor
(BLDC motor or BL motor) are synchronous motors powered by
direct current
(DC) electricity via an
inverter
or
switching power supply
which produces electricity in the form of
alternating current
(AC) to drive each phase of the motor via a
closed-loop controller
. The controller provides pulses of current to the motor windings that control the
speed
and
torque
of the motor.
The
advantages
of a brushless motor over brushed motors are
high power-to-weight ratio, high speed, electronic control, and low maintenance.
DRV10866 Driver IC
DRV10866
is a three-phase, sensorless motor driver with integrated power
MOSFETs
with drive current capability up to
680 mA peak
. DRV10866 is specifically designed for low noise and low external component count fan
motor drive applications
. DRV10866 has built-in
over-current protection
with no external current-sense resistor needed.
It works between Input voltage range of
1.65 to 5.5 V
. It has very advanced features like
Lock detection, Voltage surge protection, UVLO, Thermal shutdown
, etc.
Brushless DC Motor Driver Circuit
The
circuit diagram
for Brushless DC (BLDC) Motor Driver using 555 IC & DRV10866 driver IC is given below.
A
100k pull-up resisto
r is used at pin 1 of DRV10866. Then we connect Pins 2, 4, 7 & 6 of DRV10866 to common, phase A, phase B & phase C of the BLDC motor. Pin 10 of DRV10866 is connected to pin 7 of 555 Timer IC to get the p
ulse-width modulated (PWM)
signal from DRV10866. This controls the
speed
of the BLDC motor.
The output signal (PWM) is available at Pin 7 of 555 Timer IC. To adjust the
25kHz PWM signal’s
, you can adjust the
duty cycle
using a 5K Potentiometer. The duty cycle can be varied from 5% to 95% which controls the speed of BLDC Motor.