V
Vicente
- Jan 1, 1970
- 0
Hi,
I've build a PWM control following this design:
http://www.pablin.com.ar/electron/circuito/varios/pwm-cc/index.htm
But I made some changes:
1. I don't know what the 10uF capacitor is used for, so I am not using
it.
2. As I want to use a high current motor (10A), I've changed:
2.1: IN5408 > BY229-600
2.2: IRF830 > BUZ11 with HEATSINK
3. I guess that the 1K resistor in the BUZ11 gate is used to discharge
the internal capacitor of the transistor (avoid over-heating), but if
I use it there is no current in the MOTOR
4. Capacitors on pin 6 and 5 are 10nF instead of 100 nF
I will use a 12v 10A motor, and a 12v 20Ah battery, but for testing
purposes I am using an standard battery car (12v 50Ah).
The circuit is working fine but I am experiencing some issues:
a) When the motor is not working at maximum I hear a high frequency
noise.
b) With the 50Ah battery I saw a 30A peak current, and the transistor
burned out. I am thinking about using a more powerfull transistor. Do
I need to change it or not? Cause I will use a 20Ah battery in the
final design.
c) I will use this PWM in a three-wheeled electric vehicle. What do
you think about the general project itself? It is enough with that
battery and motor? Any other advice?
Thanks in advance for your help.
Vicente.
I've build a PWM control following this design:
http://www.pablin.com.ar/electron/circuito/varios/pwm-cc/index.htm
But I made some changes:
1. I don't know what the 10uF capacitor is used for, so I am not using
it.
2. As I want to use a high current motor (10A), I've changed:
2.1: IN5408 > BY229-600
2.2: IRF830 > BUZ11 with HEATSINK
3. I guess that the 1K resistor in the BUZ11 gate is used to discharge
the internal capacitor of the transistor (avoid over-heating), but if
I use it there is no current in the MOTOR
4. Capacitors on pin 6 and 5 are 10nF instead of 100 nF
I will use a 12v 10A motor, and a 12v 20Ah battery, but for testing
purposes I am using an standard battery car (12v 50Ah).
The circuit is working fine but I am experiencing some issues:
a) When the motor is not working at maximum I hear a high frequency
noise.
b) With the 50Ah battery I saw a 30A peak current, and the transistor
burned out. I am thinking about using a more powerfull transistor. Do
I need to change it or not? Cause I will use a 20Ah battery in the
final design.
c) I will use this PWM in a three-wheeled electric vehicle. What do
you think about the general project itself? It is enough with that
battery and motor? Any other advice?
Thanks in advance for your help.
Vicente.