As shown in the illustration, which brush...

Question 1 / 2707066636eed28f7522a1c51db35

Question 1 of 2707066636eed28f7522a1c51db35

As shown in the illustration, which brush holder would be appropriate to use in a bidirectional motor? Illustration EL-0029

Back

Question 1 of 27070

As shown in the illustration, which brush holder would be appropriate to use in a bidirectional motor? Illustration EL-0029

If the question has a related picture, it will appear here.

🔍 Key Concepts

• Brush lead angle relative to commutator rotation • Difference between radial, leading, and trailing brush mounts in the figure • What happens to the frictional force and leading edge when the motor reverses direction

💭 Think About

• Look at the arrows showing rotation and frictional force in views B and C. How does changing rotation direction affect which edge of the brush becomes the leading edge? • Which brush mounting style in the illustration depends on a specific direction of rotation, and which one works the same no matter which way the armature turns? • For a motor that must run safely in both directions, would you want a brush that is optimized for one rotation direction only, or one that is symmetrical with respect to rotation?

✅ Before You Answer

• Identify which mounts are labeled leading mount and trailing mount, and notice their angles from the radius line. • Compare those to the radial mount in view A: is there a specified angle that assumes a particular rotation direction? • Before choosing, verify which option would keep the contact conditions essentially the same when the rotation direction is reversed in a bidirectional motor.

Question 1 of 27070

As shown in the illustration, which brush holder would be appropriate to use in a bidirectional motor? Illustration EL-0029

trailing mount only

radial mount

both leading and trailing mount

leading mount only

Question 1 / 2707066636eed28f7522a1c51db35

Question 1 of 2707066636eed28f7522a1c51db35

As shown in the illustration, which brush holder would be appropriate to use in a bidirectional motor? Illustration EL-0029

Back

Question 1 of 27070

As shown in the illustration, which brush holder would be appropriate to use in a bidirectional motor? Illustration EL-0029

If the question has a related picture, it will appear here.