Electrical Engineering

Questions tagged [motordriver]

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Is it safe to use nSleep pin of DRV883x Motor driver, as a PWM control?

DRV883x H-Bridge drivers implement 3 pins to control driver's behavior; IN1/IN2 for DRV8837 and EN/PH for DRV8838. except for these 3 pins, they are pin to pin compatible: For a simple, dual H-Bridge ...
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22 views

DRV8256PEVM: Vref does not change Itrip

I'm playing with the TI's DRV8256PEVM evaluation board based upon a DRV8256P driver. The GUI connects to the board and I can enable the driver and change the IN1/2 PWM duty-cycle. In the right pane I ...
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1answer
116 views

What is the purpose of this PCB?

I have a solar screen in my motor home that is motorized with a DC motor (24V.) Today, I tried to move it but no response. I removed all the solar screen and inspected the motor. I saw it has a PCB ...
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1answer
20 views

Removing L298N Jumpers & Motors stop

I've removed all jumper connecting the ENA pin with the 5V pin, and used a female-to-male jumper wire to connect the ENA pin to my breadboard (being powered by 12V from the arduino)-- however, now the ...
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2answers
38 views

Stepper Motor Drive

I am using a stepper motor of the following rating: Voltage : 3 -5V Current 2.5A/ phase. When two wires of the coil areconnected with a dc power supply at 5V and ground, the motor takes about 2.5A. I ...
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32 views

MX1508 motor driver flyback diode controversy

Hi I am trying to use the MX1508 motor driver with my 6V dc motor, but I've read criticism that it doesn't have flyback diodes. I'm seeing conflicting opinions online about this. For example, in this ...
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1answer
59 views

Not able to power motor with the L298N motor driver [duplicate]

I am trying to make a robot and I have some problems with the L298N motor driver. I supplied it with 9 volts and used its 5 volts output to one of the pins. I put two motors at both motor outputs and ...
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35 views

Speed control of DC motors and voltage being lost

I am experimenting with speed control of DC motors using L298N and TB6612FNG. In order to compare the two chips I am supplying the motor with the same voltage in both cases \$ V_m = 4.7V \$. For the ...
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46 views

Does a motor driver need a ground reference for logic signal with optocoupler isolation on logic pins?

I am using two power supplies, one for the motor driver (+24v), and the other one for my MCU (+5v). My concern is that in the datasheet of the motor driver (DRV8871) it is mentioned that GND needs to ...
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1answer
44 views

Choosing proper stepper motor, motor driver and power supply combination

I need to run 15 stepper motor simultaneously with different duty cycles for a mechanical study. However as a mechanical engineer my knowledge on the electronics is not much more than none. Could you ...
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0answers
32 views

L293D driver DC motors need help to start rotating

I set up this circuit which uses L293D motor driver IC to control two DC motors. +6V input is connected to unregulated power supply. It's current rating is 500 mA. There is a connection between ...
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1answer
31 views

Connecting different DC grounds to a single motor driver IC

I'm building a simple robot and have a L293D motor controller (details here and diagram below on the left). It takes two positive input voltages - one for powering the IC and one for driving the ...
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2answers
122 views

My DC motor slows down and stops while using an L298N motor driver with an Arduino Uno

Whenever I run a program for running the DC motor, the motor suddenly slows down and finally stops, I don't know why it happens. I use an L298N motor driver, an Arduino Uno, and a 9V battery for motor ...
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1answer
91 views

Differences between the drive algorithms for BLDC, PMSM and IPMSM

In the manual for a Scott Drive motor controller, they have a parameter you can set, called Motor Type. Its description reads The motor type determines the method used to calculate the reference Id, ...
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0answers
23 views

Motor Driver L6203 Questions

Hello I am a beginner trying to use the L6203 motor driver. I am working while looking at the L6203 data sheet, and I am trying to make a circuit as shown in the picture below. However, I am curious ...
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1answer
34 views

Help find component - MOSFET

I have a old motor driver board, for which I don't know the current capability. So I tried to find the datasheet of the MOSFET on the board. But without success (Bing search in various variants) This ...
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2answers
72 views

How can I choose an absolute encoder with appropriate resolution?

I have a motor that runs between 3 to 3000 RPM. The drive update time is 2.2 micro seconds. What is appropriate an encoder resolution for this work (especially for lower speeds) so the drive could ...
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2answers
45 views

What exactly is 1.x and 2.0 power scalar V/f control in VFDs?

These are terms that I have come across in multiple operating manuals for VFDs and usually, they just mention that it's used for variable torque applications. My doubt is "what exactly is it?&...
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3answers
469 views

Can we or should we parallel H-bridge module for increse current?

Can we parallel H-bridge input and output for increse current? For specific I select 2 case L298N (BJT based) TB6612FNG (Mosfet based) For L298N as shown in datasheet suggested to parallel chanel to ...
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0answers
49 views

Single brushed DC motor driver not working when using step up voltage regulator

I'm using this Pololu single brushed drive to control a DC motor. Its voltage working range is from 4.5 to 28V and it works fine when I supply it with two 18650 batteries in series. I want to make it ...
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54 views

This L293D just blew up. Can someone pease help me figure out why?

I was using a motor driver breakout board with a L293D IC on it, along with a 7805 voltage regulator and a couple of capacitors. I have een using it for 4-5 months and the wire connections stayed the ...
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1answer
105 views

Does TB6612FNG require additional circuit to control motor and why

I am trying to understand the schematic for the TB6612FNG motor driver. I was unable to understand why do we need this additional circuit (marked in red in below diagram) when I can directly connect ...
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1answer
45 views

Microcontroller driven motor driver has a delayed response time?

I am wondering if changing the motor driver can lead to a faster response of the DC motors in my robot. I am using an Arduino Mega which is connected to a BTS7960B motor driver. The robot takes about ...
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5answers
27k views

Why do we use capacitors in parallel with DC motors?

Below is the circuit diagram of an L293D motor driver IC driving 2 12V DC motors. What I don't understand is the use of the capacitors marked 104 in parallel with the motors.
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0answers
25 views

Creating a pulsatile flow

I'm trying to create a pulsatile flow to mimic blood flow and have some questions about motor drivers and/or controllers. I'm trying to make the system as small as possible and am still relatively new ...
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2answers
45 views

Is this the right way to connect a Brushless Motor Driver Output Signal to a CNC BreakoutBoard?

I will purchase a Spindle Brushless Motor Driver to drive my Lathe Spindle, and I need to know if I´ll be able to connect an output signal from the Driver to my CNC BreakoutBoard (BOB), which is a ...
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1answer
111 views

Will the Stepper Motor 17HS3401 work fine with the TMC2130 driver? Or is the driver chip going to burn? Are they compatible?

I am considering whether to buy the stepper motor 17HS3401 of this catalog Current The motor uses a rated current of 1.3A. I need to connect it to the TMC2130 driver, which accepts just 1.2A with ...
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1answer
100 views

How to control motors with an arduino

I am a complete beginner with electronics mostly dabbling as a hobby so please forgive me if I struggle to follow or don't understand specific terms. I have been working on a project for a while now ...
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1answer
61 views

Arduino DC Motors Not Working Correctly With The Servo

I m building a simple obstacle avoidance robot. Here I Typed the code. But there is a bug I cannot find . The Motors are not working properly when they intergrated as whole. when I check the codes and ...
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1answer
125 views

Powering an L298N's IC and an Arduino Uno R3 using an LM7805

Before i start i would just like to say that i am an absolute beginner at this, and this question might be a little silly. I'm trying to make a shield that'll go on top of an arduino uno. The shield ...
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2answers
129 views

DRV8873 PWM input

I'm working on DRV8873 to drive a brushed DC motor. The problem is the pin I should connect the PWM from microcontroller. DRV8873 datasheet There is two digital inputs that control the outputs but ...
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2answers
67 views

What length wire and how many devices after which I need a repeater or extender for i2c?

I am using an ESP32, which has two i2c buses. I am thinking of adding multiple devices to each bus (a total of 20 devices, 10 devices per bus). The maximum length of any device on a bus from esp32 ...
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4answers
2k views

Why does my MIC4605 keep blowing up?

I'm trying do design a mini-PCB, replacable half-bridge for motor control applications. The primary application is to use it with my modular inverter/BLDC/BDC controller. The controller design assumes ...
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1answer
82 views

Capacitor to discharge upon switch open

Update Please evaluate this third attempt: This is my first electrical project, so please be gentle with me. I know very little about electronics. I'm building a machine that has a crank that users ...
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1answer
59 views

Inductors in DC motor drivers

I've been making some research on DC motor drivers and I noticed that most medium power boards don't use inductors, but boards that can provide high current do, like this one: https://www.cytron.io/p-...
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2answers
194 views

How to amplify 3.3 volts PWM to 5 volts PWM

im working on a project to drive a motor using a motor driver that accepts 5 volts PWM (for 100% duty cycle) but im using raspberry pi 3 that has a PWM of 3.3 volts (for 100% duty cycle) as a result, ...
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2answers
183 views

How do I convert a PWM signal (with a specific duty cycle) to its respective snalog value, for an application in a low voltage, high current circuit?

I wanted a 16V,50A regulated power supply but could not find it in the market. I also searched for a buck converter for the same current output and could not find anything. So I thought of making it ...
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1answer
46 views

1-wire interfacing with motor (design suggestion and review)

For my application, I need to deploy many sensors and a motor. So I chose the 1-wire bus protocol from Dallas/Maxim. Also, I am using temperature sensors which support one-wire protocol. So I thought ...
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1answer
107 views

Variable Frequency Drive with AC motor, 30kW

I have a VFD that controls an AC motor which compresses air. It is an 30kW motor. I have set the parameters required to drive the motor and it runs the motor but not properly. During the test the ...
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2answers
36 views

ic to drive either one pwm signal or another

I have an existing RC circuit for a toy truck. Obviously it already has its own mC to receive the antenna signal and output a PWM signal to a motor driver IC. I want to be able to ALSO control this ...
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1answer
267 views

How to get right voltage output with Bts7960b H-Bridge?

I am using a NodeMCU to control a BTS7960b motor driver. (datasheet of the BTS7960) This driver controls a 12v dc motor. This image shows my wiring (without the display and the buttons and with a ...
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7answers
2k views

Why do motor drives have multiple bus capacitors of small value capacitance instead of a single bus capacitor of large value?

All professional DC, BLDC or PMSM motor controllers that I have seen (Sevcon, etc.) have large numbers of DC bus capacitors connected in parallel. Their capacitances range around 100 µF - 220&...
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0answers
65 views

Motor driver powered by PSU instead of battery [duplicate]

I am about to use a motor driver in a project (MDDS30 by Cytron) and I was going to power it using a 12v 11.5a PSU. I discovered that the manufacturer warns against using a PSU, and that it might ...
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3answers
413 views

Problems with dc motor driver design: Mosfet fail

I made a brushed dc motor driver. The motor speed is controlled with PWM (from an Arduino). The motor that I'm using draws 3 amps without load. This is the schematic: As you can see there are two N ...
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1answer
49 views

STM32F0, DRV8840 and GPIO Problems

Today I tested a DC driver with a STM32 MCU. The schematic is like this: I have a problem with the ENABLE Signal between the DRV8840 and the MCU. When the DC Motor is disconnected, I toggle the EN ...
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490 views

BLDC startup algorithm

How do real world algorithms for sensorless BLDC motors handle startup under load? Right now I run phase 1 for a few milliseconds to get the rotor in a known position, the I run open loop for a ...
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1answer
90 views

Should I be concerned about reverse current?

I have incorporated a reference design from this page on discrete driver circuits for vibration motors for the high-side configuration. Here is the picture of the circuit: I'm concerned about the ...