DC Motor
Procedure
1. H bridge theory was given by technician.
2. A circuit was set up as in figure 1.
3. H-bridge circuit was created. There were 4 switches and a motor in a circuit with two jumpers.
4. The theory was applied. The jumpers were connected to the alternate voltage supply.
5. The direction of DC motor was tested and determined.
6. All switches were in closed position at initial condition.
7. Only switch 1 and 4 was closed at the first condition as in figure 2(a). The direction of DC motor and the RPM of DC motor was recorded
8. Switch 1 was opened and switch 2 was closed as in figure 2(b) after the first reading was recorded. The motor was braked. The RPM of DC motor was recorded.
9. Step 7 was repeated by switching the switch 2 and 3 closed as in figure 2(c).
10. Step 8 was repeated by switching the switch 3 opened as in figure 2(d).
11. All switches were open as in figure 3, DC motor runs free and the rotating speed was recorded
11. The circuit were connected to the oscilloscope and the result was recorded.
Discussion
1. DC motor is widely used in radars, computer, robots, tracking system, process controller and etc
2. The movement of DC motor is affected by the direction of current flows.
3. DC motor moves to the right when switch 1 and 4 are close. The current flow through switch 1 and connected to DC motor then passes switch 4 . There is no current flow through switch 2 and 3 since the switch are open.
4. The rotation speed of DC motor while switch 1 and 4 are close is ___________
5. DC motor automatically brakes when switch 1 is open and switch 2 is close. The rotation speed of DC motor at this position is _____________________
6. DC motor moves to the left when switch 2 and 3 are close. The current flow through switch 3 and connected to DC motor then passes switch 2. There is no current flow through switch 1 and 4 since the switch are open.
7. The rotation speed of DC motor while switch 3 and 2 are close is ___________
8. DC
1. H bridge theory was given by technician.
2. A circuit was set up as in figure 1.
3. H-bridge circuit was created. There were 4 switches and a motor in a circuit with two jumpers.
4. The theory was applied. The jumpers were connected to the alternate voltage supply.
5. The direction of DC motor was tested and determined.
6. All switches were in closed position at initial condition.
7. Only switch 1 and 4 was closed at the first condition as in figure 2(a). The direction of DC motor and the RPM of DC motor was recorded
8. Switch 1 was opened and switch 2 was closed as in figure 2(b) after the first reading was recorded. The motor was braked. The RPM of DC motor was recorded.
9. Step 7 was repeated by switching the switch 2 and 3 closed as in figure 2(c).
10. Step 8 was repeated by switching the switch 3 opened as in figure 2(d).
11. All switches were open as in figure 3, DC motor runs free and the rotating speed was recorded
11. The circuit were connected to the oscilloscope and the result was recorded.
Discussion
1. DC motor is widely used in radars, computer, robots, tracking system, process controller and etc
2. The movement of DC motor is affected by the direction of current flows.
3. DC motor moves to the right when switch 1 and 4 are close. The current flow through switch 1 and connected to DC motor then passes switch 4 . There is no current flow through switch 2 and 3 since the switch are open.
4. The rotation speed of DC motor while switch 1 and 4 are close is ___________
5. DC motor automatically brakes when switch 1 is open and switch 2 is close. The rotation speed of DC motor at this position is _____________________
6. DC motor moves to the left when switch 2 and 3 are close. The current flow through switch 3 and connected to DC motor then passes switch 2. There is no current flow through switch 1 and 4 since the switch are open.
7. The rotation speed of DC motor while switch 3 and 2 are close is ___________
8. DC