DC Drives QUIZ
1. List three types of operations where DC drives are commonly found.
2. How can the speed of a DC motor be varied?
3. What are the two main functions of the SCR semi conductors used in a DC drive power converter?
4. Explain how SCR phase angle control operates to vary the DC output from an SCR.
5. Armature-voltage-controlled DC drives are classified as constant-torque drives. What does this mean?
6. Why is three-phase AC power, rather than single phase, used to power most commercial & industrial DC drives?
7. List what input line & output load voltage information must be specified for a DC drive.
8. How can the speed of a DC motor be increased above that of its base speed?
9. Why must field loss protection be provided for all DC drives?
10. Compare the braking capabilities of nonregenerative & regenerative DC drives.
11. A regenerative DC drive requires two sets of power bridges. Why?
12. Explain what is meant by an overhauling load.
13. What are the advantages of regenerative braking versus dynamic braking?
14. How is the desired speed of a drive normally set?
15. List three methods used by DC drives to send feed back information from the motor back to the drive regulator.
16. What functions require monitoring of the motor armature current?
17. Under what operating condition would the mini mum speed adjustment parameter be utilized?
18. Under what operating condition would the maxi mum speed adjustment parameter be utilized?
19. IR compensation is a parameter found in most DC drives. What is its purpose?
20. What, in addition to the time it takes for the motor to go from zero to set speed, does acceleration time regulate?
2. How can the speed of a DC motor be varied?
3. What are the two main functions of the SCR semi conductors used in a DC drive power converter?
4. Explain how SCR phase angle control operates to vary the DC output from an SCR.
5. Armature-voltage-controlled DC drives are classified as constant-torque drives. What does this mean?
6. Why is three-phase AC power, rather than single phase, used to power most commercial & industrial DC drives?
7. List what input line & output load voltage information must be specified for a DC drive.
8. How can the speed of a DC motor be increased above that of its base speed?
9. Why must field loss protection be provided for all DC drives?
10. Compare the braking capabilities of nonregenerative & regenerative DC drives.
11. A regenerative DC drive requires two sets of power bridges. Why?
12. Explain what is meant by an overhauling load.
13. What are the advantages of regenerative braking versus dynamic braking?
14. How is the desired speed of a drive normally set?
15. List three methods used by DC drives to send feed back information from the motor back to the drive regulator.
16. What functions require monitoring of the motor armature current?
17. Under what operating condition would the mini mum speed adjustment parameter be utilized?
18. Under what operating condition would the maxi mum speed adjustment parameter be utilized?
19. IR compensation is a parameter found in most DC drives. What is its purpose?
20. What, in addition to the time it takes for the motor to go from zero to set speed, does acceleration time regulate?
You may also like:
It depends on so much more than the simple requirements listed of high starting torque and variable speed. What kind of application are you using it for? Is it on an automobile (where you have DC already), a ...
Overload protection: the soft starter has current control loop to track and detect of the changes of the electric motor current. Achieve overload protection by increasing overload current settings and inverse ...
First, specify that this is an isolated system with two generators feeding the same bus. Operation of an isolated system is different than a grid connected system, and the mode setting of the governors have to ...
Depends on the size of the network (# of devices planned on connecting), for medium to large corporate networks go 10.x, for home and small business 192.168.x, or to 172.16.x. I would think the IP plan would ...
Stiff voltage sources are not problematic as long as they don't get in the way of the solver's attempts to linearize the behavior of the circuit matrix via step size reduction. It is the highly nonlinear stiff ...
Gozuk Blog: all about electric motor control & drives industries development in energy saving applications.Featured
Like pumps, fans consume significant electrical energy while serving several applications. In many plants, the VFDs (variable ...
A frequency inverter controls AC motor speed. The frequency inverter converts the fixed supply frequency (60 Hz) to a ...
Motor starter (also known as soft starter, motor soft starter) is a electronic device integrates soft start, soft stop, ...
Soft starter allows the output voltage decreases gradually to achieve soft stop, in order to protect the equipment. Such as the ...
Soft Starter reduces electric motor starting current to 2-4 times during motor start up, reduces the impact to power grid during ...
A frequency inverter controls AC motor speed. The frequency inverter converts the fixed supply frequency (60 Hz) to a ...
Motor starter (also known as soft starter, motor soft starter) is a electronic device integrates soft start, soft stop, ...
Soft starter allows the output voltage decreases gradually to achieve soft stop, in order to protect the equipment. Such as the ...
Soft Starter reduces electric motor starting current to 2-4 times during motor start up, reduces the impact to power grid during ...
In Discussion
Life of a centrifugal Pump
SCADA Engineering and Training Cost
Discussion on Isolation and insulation related to wire or in transformer
Consideration when selecting 10MW thin-film manufacturer supplier
3D printing on Industrial Automation
use of varistors in SPICE simulations
Pros and Cons of Self-priming Centrifugal Pumps
Connection between Reactive Power and Vibration
SCADA Engineering and Training Cost
Discussion on Isolation and insulation related to wire or in transformer
Consideration when selecting 10MW thin-film manufacturer supplier
3D printing on Industrial Automation
use of varistors in SPICE simulations
Pros and Cons of Self-priming Centrifugal Pumps
Connection between Reactive Power and Vibration
