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Are there any negative effects of running a DC motor at lower than the rated voltage?

In regard to the buck converter vs PWM - they are almost the same. The buck converter has PWM and some dedicated inductance built in, the bare PWM motor controller abuses the inductance of the motor ...
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1 vote

RC snubber circuit on reversing motor

As long as the capacitors are not polarized (and generally capacitors << 1 μF are not polarized), electrically the arrangement of R & C in series doesn't matter. Therefore the snubber will ...
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1 vote
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PI speed control of DC motor using a boost chopper simulation in Simscape

My guess is your units are wrong, you can find out if you do several steps to the control signal and if they linearly step with it then the control signal is off by constant. Usually in control ...
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2 votes
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Using a CPU fan to drive a MOSFET on/off

Give this a run. The 0.8 V from the fan may just be enough to turn Q1 on, which will then turn off M1. simulate this circuit – Schematic created using CircuitLab
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How to current control for DC motor with PWM

This is a year old question, and we have not heard back from the OP, but I thought I might make some suggestions in case someone else has a similar problem. You can effectively eliminate noise on the ...
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Driving a motor using a MOSFET, Raspberry 4b, and a converter

You need to use a MOSFET designed to be used with logic levels. The gate threshold in the datasheet is the level at which it will barely conduct. Look at the graph instead. Note that 3.3V is not shown....
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How to control position and speed of a motor in Simulink?

The first thing you need to do is come up with a physical model. A pendulum model will be sufficient. Then you need to come up with a system of equations that will make sense for your simulink model. ...
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4 votes

ULN2003 does not distribute power equally to all pins

I'm not sure if this is enough to answer your question but here it is. The boxed section is copied from ULN200x datasheet. And I've shown for only 17th output. simulate this circuit – Schematic ...
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ULN2003 does not distribute power equally to all pins

The ULN2003 is not a matched or precision array, they don't guarantee that the transistor or the bias resistor are anything near being equal. So the current will distribute in the way it prefers (i.e. ...
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2 votes

H-bridge driver

What do you think now? I think you should probably simulate it in a spice package LT spice usually the one that I go to. Over all the design looks much better, and the high section of the bridge ...
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-1 votes

What does the "5.0mm" mean on this motor's nameplate?

Usually, it is shaft diameter.
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What does the "5.0mm" mean on this motor's nameplate?

5.0 mm mentioned on the motor nameplate could be the maximum depth available for the mounting screws. Screw entry to a depth greater than 5.00mm could damage the motor.
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2 votes
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BLDC motor for position control for brushed DC motors

A BLDC motor, used as an generator, produces an AC output voltage with amplitude roughly proportional to velocity, and frequency exactly proportional to velocity. There are two ways to try to extract ...
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DC blinds motor controlling

The sketch you linked to is close. Try a DPDT center off switch wired the same way and it will give your forward, off, reverse. Depending on the switch there could be enough delay when going through ...
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DC Motor Design Question - Bypassing Back-EMF

I'm worried about cooling design and cooling performance so I prefer using thick wires which will stay cool during operation under high currents... I'll need to supply very low voltage (1V-3V , when ...
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1 vote

How to drive this 5-pin speed controlled DC motor?

It should be left floating, according to the datasheet. The switch appears to be a SP3T slide switch connected so that the common terminal is connected to nothing, then A, then B as you move the tab. ...
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