Questions tagged [drive]

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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 ...
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1 vote
1 answer
17 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 ...
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1 answer
51 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 ...
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  • 73
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2 answers
157 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 ...
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65 views

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 ...
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-2 votes
1 answer
83 views

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 ...
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0 votes
2 answers
77 views

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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  • 155
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1 answer
47 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 ...
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  • 101
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1 answer
81 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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1 vote
1 answer
88 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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2 votes
2 answers
432 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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  • 206
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1 answer
54 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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1 vote
1 answer
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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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  • 225
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1 answer
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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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0 votes
2 answers
65 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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260 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. ...
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1 vote
1 answer
60 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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0 votes
1 answer
835 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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  • 591
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3 answers
238 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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0 votes
1 answer
91 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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1 vote
2 answers
698 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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0 votes
1 answer
156 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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1 vote
1 answer
565 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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0 votes
2 answers
88 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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  • 807
1 vote
3 answers
518 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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  • 317
0 votes
2 answers
740 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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  • 103
5 votes
1 answer
4k 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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  • 250
0 votes
2 answers
651 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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1 vote
1 answer
377 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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1 vote
1 answer
224 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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0 votes
2 answers
706 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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2 votes
2 answers
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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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 ...
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