Is this PWM controller?

[Stan21]

I have a pcb that controls a small electric motor speed with a pot.
I tried to "reverse-engineer" connections diagram and this is what I got:

Is this a PWM controller?

[ledtester]

No, the motor is continuously running and the pot has a direct control of its current.

You can play with a Falstad simulation here:

https://tinyurl.com/y55lpan5

[Zero999]

It's a magic  smoke generator because the battery's polarity is incorrect.

Even if the battery is connected correctly, it won't work very well because the motor current is dependant on the h_FE of the transistors.

Use a 555 timer. This circuit shows an incandescent lamp, which should be replaced with your motor and diode in reverse parallel.

[strawberry]

No, the motor is continuously running and the pot has a direct control of its current.

No current sense in circuit, regulates motor voltage across motor proportional to pot position