If your motor is a two-speed motor, you can install a simple switch that allows you to set the wiper speed to low or high, as well as to set the wipers to “Off.” “Off” sometimes is called “Park” because this setting allows the wipers to slowly return to their original position before they stop.
Thus, the speed of a DC motor can be controlled in three ways:
1:By varying the supply voltage.
2:By varying the flux, and by varying the current through the field winding.
3:By varying the armature voltage, and by varying the armature resistance.
Some DC motors also generate high torques at low speeds, but are more suited towards continuous uses, as their torque is constant over their speed range. The main difference is that, while stepper motors can push harder from rest, DC motors tend to have more sustained output.
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