66-67.5 Wiper Motor - Triple Brush Voltage/Current Flow?
Posted: Mon May 27, 2019 8:07 pm
Yes, a long title.
I'm finishing up a harness set and was checking to make sure the wiper motor works okay. As is usual with me I get to wondering about how it is wired. Unfortunately I did not finish my education in electronics and turned to mechanical so my knowledge of motors is limited.
So the motor is a 3 brush motor. It has 12v going in and a low brush out and a high brush out. I searched and searched about 2 speed motors and how they work and did not find all that I wanted. Found that it probably has two winding.
I have attached a diagram of how the motor is wired at low speed. Power goes to both the high and low brushes. Combined this gives you a slower speed. What I found was in fact this motor can be a 3 speed motor. If you hook power just to the low then it goes pretty slow. Hook power to both as it is wired in the car then it goes a little faster. And last hooked just to the high speed brush wire you get the faster speed.
So what is my point/question? I'm wondering why it runs at the slower speed with both brushes hooked up? I'm supposing it has to do with resistance or the number of winding. Anyone here know?
The diagram has the flow highlighted with green and yellow with a dashed red line.
Thanks.
I'm finishing up a harness set and was checking to make sure the wiper motor works okay. As is usual with me I get to wondering about how it is wired. Unfortunately I did not finish my education in electronics and turned to mechanical so my knowledge of motors is limited.
So the motor is a 3 brush motor. It has 12v going in and a low brush out and a high brush out. I searched and searched about 2 speed motors and how they work and did not find all that I wanted. Found that it probably has two winding.
I have attached a diagram of how the motor is wired at low speed. Power goes to both the high and low brushes. Combined this gives you a slower speed. What I found was in fact this motor can be a 3 speed motor. If you hook power just to the low then it goes pretty slow. Hook power to both as it is wired in the car then it goes a little faster. And last hooked just to the high speed brush wire you get the faster speed.
So what is my point/question? I'm wondering why it runs at the slower speed with both brushes hooked up? I'm supposing it has to do with resistance or the number of winding. Anyone here know?
The diagram has the flow highlighted with green and yellow with a dashed red line.
Thanks.