Questions tagged [drive]

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54 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 ...
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1answer
78 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 ...
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2answers
102 views

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, ...
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1answer
45 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 ...
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1answer
59 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 ...
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1answer
45 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 ...
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2answers
51 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 ...
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0answers
77 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
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1answer
56 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-...
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1answer
171 views

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 ...
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3answers
114 views

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 ...
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1answer
41 views

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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2answers
446 views

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. ...
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1answer
71 views

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/...
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1answer
385 views

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 ...
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2answers
54 views

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 ...
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3answers
249 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 ...
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2answers
514 views

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 ...
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1answer
3k views

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?
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2answers
534 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 ...
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1answer
226 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 ...
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1answer
176 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 ...
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2answers
603 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 ...
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2answers
1k views

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 ...
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4answers
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 ...