Tagged Questions
3
votes
1answer
134 views
Criteria behind selecting pwm frequency for speed control of a dc motor?
I'm working on a speed control circuit for a brushed dc motor (24v, 500rpm, 2A, 4kgcm).
The main components that I plan to use are PIC16f873, 4n25 optocoupler, IRFZ44N MOSFET, BY 500 - 800 diode(for ...
1
vote
1answer
122 views
Design Considerations for a dc motor drive circuit?
I'm planning to develop a control circuit for a 24V, 500 RPM (@no load), 2A, 4 kg-cm brushed DC motor. Motor has to run only in one direction. I plan to use IRF44ZN MOSFET with a proper driver to ...
2
votes
1answer
133 views
Using a single MOSFET to switch current direction
I am currently using a 30N06L MOSFET in order to control a DC engine from an Arduino using this circuit:
The problem is that this way I cannot change the direction of the engine.
Is there a way to ...
1
vote
2answers
262 views
PWM Motor speed control using PIC; What mosfet to use
I have a 5V PIC16f877a controlling the speed of the motor 12V which has a power rating of 8W; the current will be around(600mA) am I correct?
The motor is basically a small water pump commonly used ...
0
votes
3answers
663 views
Why won't my MOSFET work?
I am having trouble getting my N-channel MOSFET to work. I am using the MOSFET to control a DC motor. I have the the positive end of 5V power supply going to my motor and from the motor to the drain. ...
1
vote
2answers
898 views
Is this MOSFET a good choice? PWM -> FET -> DC Fan
I am planning on using a PIC microcontroller's IO pin (3.3V Logic) to drive this MOSFET that will drive a 12V DC fan:
MOSFET N-CH 60V 2.7A SOT-23-3
According to the datasheet, there is a diode in ...
4
votes
1answer
184 views
Maximum switching speed of a motor
If I have a MOSFET (or a number of paralleled MOSFETs) driving a motor, what determines the maximum bandwidth (PWM frequency) at which I can excite a motor phase?
Is this only a function of the total ...
1
vote
2answers
2k views
TIP31 (TIP120) as DC Motor driver compare to MOSFET
I'm trying to drive DC motor with PWM using PIC P16F1824. Some books suggest using TIP31/TIP120 as the driver.
So I have PWM output pin connected Base pin TIP31, the Emitter pin connected to Ground.
...
2
votes
1answer
722 views
Simple Motor driver circuit diagram help
I am trying to create a small motor driver for a DC motor, 9 V - 12 V. Max current and stall current I do not know, but I am using the stock motor of a Blade CP Helicopter. I just want to know if I am ...
