Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [drive]

36 questions
8
votes
1 answer

How the slew-rate and drive strength affect the output signal of the FPGA?

Can someone describe the difference between the drive strength and the slew-rate preferences in Lattice FPGA?
ercegovac
  • 310
  • 2
  • 12
2
votes
2 answers

How to implement the design of a bidirectional buck-boost converter?

I need your help in designing a bidirectional buck boost converter with the following requirements: Input voltage: 100V-400V Voltage range: 250V-1.2kV Output current: 40-80A Power dissipation of 24 kW. Switching frequency: 20kHz I did some…
victor_uk
  • 39
  • 5
2
votes
2 answers

LED resistor on 3.3V source - what happens to LED current/voltage drop?

This may be very basic here but for some reason I can't seem to wrap my head around it. I've got a chip delivering 3.3V to drive a LED. The LED has a typical 3.2V voltage drop and max 3.5V. First off, yes I can pick another LED but now I'm…
Mart
  • 312
  • 1
  • 13
2
votes
2 answers

Problems driving pulse transformer with low-side MOSFET switch

I'm trying to produce a DC isolated output voltage of approximately 2.5V at 100mA from a ~55V DC supply. The purpose is to charge individual cells in a lead-acid battery from the power of the battery as a whole (it's a 48V system, 2V cells). I've…
Jonathan Musther
  • 49
  • 1
  • 6
1
vote
1 answer

Clock out drive strength - Current

In the datasheet of this IC, what is the benefit or purpose of having 12mA and 16mA drive strength for the clock output pins? What is the purpose of having 2 drive strength values for the clock? Is it an input current or output current for the IC…
user220456
1
vote
1 answer

Meaning of "Supply Voltage: 3~132V" on an electric drive system plate?

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 rating is 13.3 A. Here's the best photo I have…
Harshvir Singh
  • 35
  • 1
  • 8
1
vote
1 answer

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 wire it delta this ratio is still constant. But…
d.alex
  • 225
  • 4
  • 10
1
vote
1 answer

What micro-controllers are suitable for a closed-loop DC Motor?

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-controllers best suitable for this project?
Arthur D. Zambezi
  • 13
  • 2
1
vote
2 answers

Colpitts / Clapp oscillator crystal drive level

simulate this circuit – Schematic created using CircuitLab As I understand this circuit has some initial gain at startup, then as the oscillation builds up gain goes to unity at some moment. How to modify such circuit to change crystal power…
Vincent
  • 69
  • 5
1
vote
1 answer

DC link capacitor for induction motor drive

I am simulating FOC drive for a 5kW,400V, 50Hz 3-phase induction motor. The drive algorithm worked fine when inverter was fed from proper DC source of suitable value. However, in practice, the drive has to work as stand-alone unit so it has to…
Deep
  • 582
  • 4
  • 21
1
vote
3 answers

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 runs the higher the overall current there is…
Ph3ng
  • 337
  • 1
  • 9
  • 20
1
vote
1 answer

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 the reverse torque generated by the drive?
Sham leo
  • 21
  • 2
1
vote
1 answer

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 reversing the polarity of the motor driving the…
Florian Bach
  • 111
  • 2
1
vote
4 answers

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 how does it control the motor?
Stephen Collings
  • 17,373
  • 17
  • 92
  • 180
0
votes
0 answers

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 occasionally blows R16 and or C15 at first power up.…
JerryR
  • 1
  • 1
1
2 3