Questions tagged [drive]
The drive tag has no usage guidance.
44 questions
7
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1
answer
379
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Design of very long serial signal systems
In the current case there is a single signal conductor, tens (hundreds?) of meters long, which serially connects door and window sensors for a whole building. The sensors are simplest possible ...
0
votes
1
answer
237
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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
1
vote
1
answer
46
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single phase into vfd
I have a three phase in three phase out vfd which is rated for 230V. I would like to use it to power a three phase motor. The manufacturer of the drive states it will run from a single phase input, ...
1
vote
2
answers
183
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Which part on the circuit board has the software or firmware? [closed]
I am having difficulty to locate which part holds the firmware or software to make the board function properly. The board is used as a control for a 375 kW drive. I replaced the board with a new one ...
- 11
2
votes
2
answers
304
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Is Modbus suitable for motion control positioning?
I need to issue position setpoint commands to a servo drive 50 times/sec. The drive will be responsible for closing the PID loop, etc, while the motion controller I'm developing will handle generating ...
- 753
0
votes
0
answers
68
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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
1
answer
324
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What's the Purpose of pin 44 on IDE cables
So I was looking at the pinout for 44 pin, notebook type IDE cables, and the 44th pin is listed as /TYPE : Type (0=ATA), what use does it have?
2
votes
1
answer
207
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Turn on/off a LED using a D-FF and a transistor
I'm trying to control a LED using some microcontroller and I designed a circuit using a D-FF and a transistor to handle it. It looks like this:
So I can control when to turn it on or of by simply ...
- 21
0
votes
0
answers
58
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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
2
answers
115
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Does max OP Amp Capacitive Drive Capability Matter with Active Filter?
I know that every OP Amp does have a limited capacitive load drive capability.
Even if not specified, it is always a good practice to use a series isolation resistor.
Anyway; when looking at an active ...
- 125
-3
votes
1
answer
85
views
Cascading opamps to drive a MOSFET [closed]
I suppose, this is a continuation of this question: Parallelizing opamps for higher precision
For the moment I'm leaning towards cascading opamps by implementing a Composite Amplifier, albeit a lazy ...
- 409
2
votes
2
answers
351
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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 ...
- 39
1
vote
1
answer
318
views
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 ...
user220456
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
0
votes
2
answers
817
views
How do DVD players know how fast to spin?
Not sure if this is the right place to ask this, but here it goes: Different optical discs have different rotational speeds, based on the size of the pits and the bitrate. Newer disks have smaller ...
- 199
0
votes
0
answers
416
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P-MOSFET driver
I need to drive a P-channel MOSFET from an output of a 74HC595 shift register which is controlled by an ESP32.
The MOSFET load will be a high power LED. Once the register is latched the outputs will ...
-2
votes
1
answer
141
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Help driving a display
I am trying to figure out a way to drive this LCD display, the datasheet can be found here https://datasheetspdf.com/mobile/611974/LG/LB070WV1/1 on page 8 it has some info on the connector/interface ...
0
votes
2
answers
247
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Can I use a .75 HP inverter drive in place of a .5 HP one?
I am trying to replace some .5 HP 3-phase AC 240V motor drives with a different brand. The new brand doesn't seem to offer a .5 HP variant. Would the .75 HP variant work?
Edit: A little twist -- the ...
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0
votes
1
answer
53
views
Replacing an AC drive in my mill and the use of a magnetic contactor in the power supply line
I have a small mill in my shop that I converted from single phase 110V 1hp motor to a 220V 3phase 2hp motor using a Teco Jnev 202. When I did that about 10 years ago I just wired it off a 30 A breaker ...
- 101
1
vote
1
answer
207
views
Accurate Static Pulling (with electric motor?)
I am trying to see if I could accurately apply a static pull to a cord to create tension.
I should not be measuring the tension directly, only be sure that the pull I apply is the force in Newtons ...
- 116
1
vote
1
answer
134
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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 ...
2
votes
2
answers
2k
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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, ...
- 376
0
votes
1
answer
74
views
Can I/O expanders be used to drive a Camera or LCD?
After searching around it seems that I/O expanders are used mostly to drive LEDs or buttons.
Could something more complicated like an LCD be driven without bit banging? I.e. are there typically ...
- 1
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
0
votes
1
answer
77
views
Is it possible to have a 2-in-1 USB device that is a Flash Drive and Power Bank? [closed]
I spent over an hour with no luck looking for a device that would provide flash storage and provide charging power to another device at the same time. I would think this would be possible as you can ...
- 11
0
votes
2
answers
442
views
Connecting a three phase drive - Should N connect with L3?
I have a simple question. I'm going to connect a three phase motor.
'Three phase source -> drive unit - > three phase motor'
But between the three phase source, should I connect N with L3, or ...
- 1,388
0
votes
0
answers
478
views
Proteus simulation error
I am getting these errors while running simulation in proteous.
[SPICE] transient GMIN stepping at time=7.87403e-006
[SPICE] TRAN: Timestep too small; timestep = 1.25e-019: trouble with node #00004.
...
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-...
0
votes
1
answer
3k
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Avoiding RCD tripping with Inverter Drive
I have a single-phase inverter drive hooked up to an RCD supply, which keeps tripping when powered. Removing the RCD is not an option, so I'm looking into other ways to make this work.
Although ...
- 753
0
votes
3
answers
360
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Fail safe led circuit
My question is about how to turn on a led before the GPIO pin has been initiated. When the IC has just been powered on and has not yet been initiated the GPIO pins remains in state HI-Z.
In Circuit-1 ...
- 47
0
votes
1
answer
275
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High Impedance Load Driving with Mosfet as Common Source Configuration
I am just trying a design ac switch with mosfets which are connected as common source. Mosfets will drive 16.2A load in normal conditions. When I try to drive 10 ohm load with 162V (peak, 400hz), as ...
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1
vote
2
answers
1k
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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. ...
- 69
0
votes
1
answer
400
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Stepper motor phase current driving confusion
So, I was studying a bit about driving current for Hybrid stepper motors and was faced with some ambiguity related to the Full Step excitation.
In this reference, https://www.researchgate.net/...
1
vote
1
answer
949
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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 ...
- 602
0
votes
2
answers
138
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designing load for the MCU to drive by output current
I am talking about a plain MCU (ATMega32, max 20 mA per pin) output asserting a logic line high or low. I.e. to drive this IC: http://www.ti.com/lit/ds/symlink/ads114s08b.pdf
There is a table ...
- 1,061
1
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3
answers
1k
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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
0
votes
2
answers
1k
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USB Drive detection circuit [closed]
I am building a simple portable speaker using a DFPlayer Mini, but I think that's not entirely relevant to my question.
I am looking for a way to detect when an USB Drive is plugged in, so the player ...
- 103
8
votes
1
answer
7k
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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?
- 320
0
votes
2
answers
888
views
Slip ring (wound rotor) 3 phase motor, what VFD should I use? [closed]
I'm trying to solve some puzzles around the electronics of an amusement ride. It's basicly an old carousel with a wave-like pattern (3 tops/downs along the circle) that i'm restoring. (So that you ...
1
vote
1
answer
456
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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
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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
2
votes
2
answers
2k
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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 ...
1
vote
4
answers
2k
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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