Is the controller suitable for brushed motors?

Basically, it is not applicable. The carbon electrode of the brushed motor slides on the coil connector. The N-S pole of the magnetic field generated by the coil has an appropriate angle difference with the N-S pole of the nearest permanent magnet iron stator. The magnetic field attracts the opposite poles and repels the same poles, generating force to push the motor to rotate. By adjusting the power supply voltage to directly control the rotation speed, it is relatively simple and basically does not need controllers.