All Questions
12 questions
0
votes
1
answer
237
views
BLDC six step commutation table confusion
What is the reason why there are many different six step commutation tables on the internet?
No1 table
No2 table
Table reference: "https://lucidar.me/en/actuators/commutation-for-bldc-motors/&...
- 27
0
votes
0
answers
68
views
LTspice induction motor model
I'm trying to simulate the dynamic model for induction motor in (alpha, beta) stator axis.
Results are not correct but I don't know how to fix this issue. How can I fix them?
Code:
...
- 1
0
votes
0
answers
58
views
Single FET DC motor drive
I have a requirement to design a bare bone, inexpensive 90 v 700 W reversable DC motor drive. I have attached the schematic showing the drive components. The prototype works well at speed, but ...
- 1
0
votes
1
answer
382
views
Is a change-over-switch with a VFD dangerous?
We are using a variable frequency drive (VFD) with a compressor. We added a rotary cam changeover switch (600 V/50 Hz, picture is attached) in between the compressor and the motor. The purpose of ...
- 75
1
vote
1
answer
134
views
Meaning of "Supply Voltage: 3~132V" on an electric drive system plate? [closed]
I have an electric drive system for a garage door that has the supply voltage mentioned above. What does the 3~132V mean?. The output torque is 190 NM and the output speed is 85 rpm. The input current ...
1
vote
1
answer
273
views
Maximum Voltage That Can be Applied to a Motor
I was reading about 87Hz technique. I saw we can configure the drive for a motor 400Y/230D as 400V /87hz. I know v/hz ratio should be kept constant and when we configure drive as 400V and 87 Hz and ...
- 235
1
vote
1
answer
80
views
What micro-controllers are suitable for a closed-loop DC Motor? [closed]
I am working on a small experiment on a closed loop DC motor for speed control.
The DC motor is separately excited and fed through a DC chopper.
I would like to know what are the best micro-...
1
vote
3
answers
1k
views
Apart from speed, do VSD's also alter current?
As I know it, a VSD alters the frequency to change the speed of a motor. I also understand that since the back emf of the rotor is directly proportional to the speed of the rotor, the slower the motor ...
- 347
1
vote
1
answer
456
views
Generate measurable reverse torque with DC motor as a dynamometer
I am trying to use a KBRG 225D regen drive as a dynamometer to apply reverse torque in order to stress my test engine? I am wondering if anyone has experience or guidance? I am not sure how to measure ...
- 21
1
vote
1
answer
289
views
Make a DVD drive turn the other way around
Lets assume I have a CD/DVD burner, and I'd like to burn the disc in the "wrong" direction, i. e., I want the DVD drive motor to turn the other way around.
Can this be done (with a normal drive) by ...
- 111
0
votes
2
answers
835
views
Installation of an AC Drive on a Plastic Extruder
We operate a Plastic Extruder for reprocessing plastic waste.
The Extruder is powered by a 40hp 1,440rpm AC Motor.
Motor Pulley: 8"
Machine Pulley: 16"
Gearbox's Gear Ratio: 14:1
Currently, the ...
- 23
1
vote
4
answers
2k
views
How does a DC motor drive control the motor?
AC motor drives are pretty well documented; topologies, inverters, frequency control, volts-per-hertz, space vector modulation. It's all out there in a dozen places.
But what is a DC motor drive, and ...
- 17.7k