Hello evryone,
In my project i want to drive a 9v 2a brushless motor from PWM arduino uno pin.
My plan was to use a IRF520 MOFSET but someone told me that this is a not so efficient driver.
So please tell me what can i use in an affordable price ?
Thanks in advance
Please provide details of the motor you want to drive, a link to specifications would be best.
But you can't drive a brushless motor like that. Brushless motors need an ESC or other speed control. And when you have an ESC you can drive that from a pin without needing a MOSFET.
Steve
slipstick:
Please provide details of the motor you want to drive, a link to specifications would be best.But you can't drive a brushless motor like that. Brushless motors need an ESC or other speed control. And when you have an ESC you can drive that from a pin without needing a MOSFET.
Steve
Thanks for help 
,
i just realise this is not a brushless motor, this is a brushed one, sorry...
i just have this information :
Operating Voltageļ¼9.6V
Suitable to use on R/C 757-6024 or other rc boat
Also i will use 3 other motors all brushed :
the second :
Specifications:
Voltage range: 3.0-12V
Rated voltage: 9V
No load speed: 20160
No load current: 680MA
Maximum current: 3.8A
Rated torque: 600G.for CM
Rated power: 20W
Starting torque: 1000G.for CM
Following is a no-load speed and current values for different voltages:
3V
6915rpm
0.52A
6V
14395rpm
0.66A
9V
21095rpm
0.68A
12V
29326rpm
0.80A
the third :
Voltage: 12V
Material: Metal
Model: N20
Revolving Speed: 1000RPM
the forth :
Voltage: DC 12V
Speed: 15RPM
No Load Stalling
Current(mA) Torque(KG.CM) Current(A)
25 4.9 3.3
thx
If the motor is to turn in either direction, you need a motor driver capable of handling the maximum current and motor power supply voltage.
If the motor is to turn in only one direction, a logic level MOSFET and a kickback diode across the motor terminals will do the job.
jremington:
If the motor is to turn in either direction, you need a motor driver capable of handling the maximum current and motor power supply voltage.If the motor is to turn in only one direction, a logic level MOSFET and a kickback diode across the motor terminals will do the job.
thanks
jremington:
If the motor is to turn in only one direction, a logic level MOSFET and a kickback diode across the motor terminals will do the job.
That's not the case for a brushless motor. A three-wire brushless motor needs an ESC to handle the
phase sensing and commutation. An 8-wire brushless motor needs at least a 3-phase bridge and some
logic to determine commutation (not so daunting as a 3-wire sensor-less motor), but still a cheap ESC
is likely to be a simpler approach in that case too.
Ther Servo library is used to talk to ESCs.
MarkT:
That's not the case for a brushless motor. A three-wire brushless motor needs an ESC to handle the
phase sensing and commutation.
But the OP did say back in post #2 that he actually meant brushed motors. And they work fine without ESCs.
Steve
Ah yes, good point...