Questions tagged [motordriver]

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Parameters to operate the servo motor

We are trying to operate the servo motor having the motor driver and encoder. Software feeds the parameters into the driver. It is written that when Pr0.08 is 0, then the value of Pr0.09 and Pr0.10 ...
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0 answers
82 views

Do I properly use Toshiba H-bridge TB67H400ANG?

I am new in this forum, so I am sorry if I don't properly ask my "question". I am a beginner in the making of circuits and Arduino programming. (first time using an H-bridge, first time ...
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53 views

What is the relationship between 3 phase motor driving signal and its position encoder?

I have this project to add a magnetic encoder on the motor shaft that will allow speed control by utilizing a TB67B000AHG chip as a driver. I want to install 3 magnetic Hall sensors HW101 stationary ...
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1 vote
1 answer
36 views

Low side driver and flyback diode

I wanted to control electric door lock (12V, 1.5A peak, unlocking time < 200ms) with Self-Protected Low Side Driver like NCV8412 (https://hr.mouser.com/datasheet/2/308/1/NCV8412_D-2317556.pdf). One ...
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60 views

Controlling two DC motors with single driver IC

I've designed a PCB that drives two DC motors with two MC33886 DC motor Driver ICs, controlled by an MCU for PWM and direction. The max. motor current is about 3.5 A. It works perfectly but now I'm ...
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1 vote
1 answer
112 views

Transfer function of an H bridge circuit

Hey guys I'm trying to find the transfer function of the given circuit. It is an H bridge motor driver circuit. I have tried to find a spice model for these chips but could not find anything. Any help ...
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2 votes
2 answers
192 views

Half bridge motor driver; best motor placement?

The two options: I have been scrolling through forum after forum for a unilateral agreement on what the best motor placement would be within the half-bridge driver circuit: Putting the motor across ...
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1 vote
1 answer
44 views

What should be the current requirement during selection of a brushed DC motor driver, stall current or maximum power current?

I am considering two 50:1 metal gearmotor 37Dx70L mm 12 V with 64 CPR encoder (helical pinion) from Polulu for an autonomous mobile robot. I am looking for a motor driver to control the speed using an ...
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resistor type and wattage for VM & VS* inputs on TB67H410 motor driver

I am looking to use a TB67H410 for a T-Jet flow control valve rated at 12V/2.5A. I will be using an ESP32 running on 3.3V. I understand most of the datasheet, except for the VM & VS* pins. As far ...
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2 votes
2 answers
115 views

Understanding a SMD Motor driver IC (heat dissipation and control)

I am designing a circuit to control a 12V, 3A electric pump. I thought the driver rz7899 is very handy. The datasheet gave me the following doubts. Is it ...
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1 answer
102 views

L9110 motor driver burning after some random time

I did a quick prototype of a plotter (two motors for x and y axes, one servo for the pen up/down). I'm using a L9110 module (dual H bridge board) to control the x and y motors. The power supply for ...
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2 answers
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Multiple brushed DC motors controlled by a small microcontroller

I have to control 10 brushed DC motors from a microcontroller. I am using an H-bridge driver for each motor which controls the speed (PWM), direction (High/Low), and enable/disable. So, for each motor ...
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  • 183
1 vote
3 answers
46 views

CS-D808 and NEMA34 undervoltage

I want to drive stepper motor with CS-D808 (30V-80V) but I don't have enough power, I have 24V. I couldn't move stepper motor. Is this because of power? Here is my Arduino code: ...
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2 votes
3 answers
149 views

H-Bridge Problem: Vgs dropping with increased motor speed

I am developing an H-bridge for use with 48VDC brushed motors. The bridge is implemented with discrete DPAK N-channel MOSFET transistors driven by an HIP4081AIBZ. I have not yet fitted RC snubbers ...
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0 answers
59 views

How do I control the speed of a simple DC motor based on the output of a machine learning algorithm using a Raspberry Pi?

Let's suppose there is a simple machine learning algorithm for detecting speed limit signs using image recognition and it detects a 30 km/hr sign. Is there any way to send instructions to my motor ...
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2 votes
1 answer
101 views

High-power motor driver without driver IC

I'm developing a circuit to power a 300W DC motor with 25A rated current. I have experience powering smaller motors with motor driver ICs, but I can't seem to find an in-stock motor driver IC designed ...
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2 answers
64 views

How to deploy a motor driver and MCU onto larger sized robot without a PCB?

The robots I built previously were all similar to the 4WD Kit from amazon. With these kits it's easy to use an H-Bridge breakout similar to this and using a perfboar to solder to the connections to ...
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114 views

How to check if L293D IC is working or not with a multimeter?

I know it is probably better to toss out a doubtful IC for a new one, but I would like to know if there is a way to check if the IC is faulty using a DMM.
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1 answer
134 views

How to limit current output to 1A from 12V lithium ion battery

We are making a simple bot that uses a 12 V lithium ion battery,which is connected to a power module, for 5V and 3.3 V output. Now I connect a TB6612FNG motor driver with ESP32. The ESP32 is powered ...
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0 votes
1 answer
93 views

Hall-sensored BLDC motor does not spin and triggers a fault condition

I've been trying unsuccessfully to run a hall-sensored hoverboard BLDC motor (24V, 250W) using the MP6532 chip. The PWM signal is generated using TIM1 in ...
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2 answers
79 views

Applying DC voltage to a motor driver [closed]

I have a 200VDC power supply from which I want to produce 110VAC 3 phase. For this, I thought of using the most suitable motor drivers. I just wanted to ask you before I buy one. As far as I know, the ...
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2 votes
3 answers
392 views

How does an H-bridge motor driver step down voltage and increase current?

I recently purchased a DRV8412 H-Bridge motor driver. It acts like a transformer, decreasing voltage and increasing current. I knew this before I purchased it, and I get that the power is the same ...
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0 answers
17 views

IRS2007S LIN input problem

I'm using IRS2007STRPBF gate driver. I set up almost the same circuit suggested in the datasheet. I am attaching the circuit. I'm connecting my 3.3V microcontroller outputs to the HIN and LIN inputs ...
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0 answers
141 views

Output voltage from L298N

Is it normal to have a higher output voltage than expected from an L298N driver? I have read that there are voltage drops and it is usual to have lower output voltages, not higher ones. If it is a PWM ...
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3 votes
1 answer
62 views

Why do DC motor drivers (eg MAX14870) brake during the low part of the PWM signal?

The 2nd line of the MAX14870 Function Table in its datasheet shows when PWM is low the outputs M1 and M2 are connected to GND and the Operating Mode is "Brake". My experience of DC motors ...
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18 votes
6 answers
5k views

What does a "fork" symbol mean on a schematic?

What does a "fork" symbol mean on this schematic: It was taken from page 6 of a motor driver datasheet: https://docs.rs-online.com/b7d1/A700000007487180.pdf
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0 votes
1 answer
35 views

Is there formula for calculating how much continuous current and max current a motor driver can supply given a certain temperature?

Note I am a beginner :) https://www.monolithicpower.com/pub/media/cms_document/category_documents/AN124_r1.0.pdf This 'paper' shows how the heat of a motor driver reduces the current that can be ...
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0 votes
3 answers
137 views

Is it best practice to use motor drivers that supply continuous current greater than the stall current of the motor?

Note I am a beginner :) I have this 300RPM motor: https://uk.banggood.com/CHIHAI-MOTOR-GM25-370-DC-Gear-Motor-6V-100210300RPM-Encoder-Motor-p-1016183.html?cur_warehouse=CN&ID=519629&rmmds=...
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0 votes
1 answer
29 views

Why is the max current of the Pololu TB67H420FTG motor driver different to the max current in the datasheet of the IC?

Note I am a beginner :) This website states that TB67H420FTG motor driver can deliver continuous 1.7 amps for each "channel" i.e. motor. https://www.pololu.com/product/2999 However, Looking ...
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1 vote
1 answer
101 views

Where are the capacitors on the l298n module?

Note I am a beginner :) Looking at the l298n datasheet: https://www.sparkfun.com/datasheets/Robotics/L298_H_Bridge.pdf I noticed on the block diagram and "Pin Functions" table, there are ...
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0 votes
2 answers
177 views

Are pull-up resistors needed for shift registers (constant current sink drivers)?

I'm wondering if pull-up resistors are strictly necessary when using shift registers to control motor drivers or LEDs. I have two STP16DPPS05 low voltage 16-bit constant current sink drivers, one ...
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0 votes
2 answers
81 views

non-inverting current sense op amp output unstable during the measurement

I would like some advice on how to solve the following problem. The following circuit is motor driver with current sense circuit. The circuit run motor at cca 30mV when is not under load, but when the ...
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0 votes
1 answer
52 views

How can i use a BLDC motor driver to control a brushed dc motor?

I have a BLDC motor driver and i wonder if i can use it as a controller for a brushed DC motor.
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2 votes
3 answers
220 views

How suitable are GaN half-bridges for small brushless motor drives (ESCs)?

The drone world uses ESCs (Electronic Speed Controllers) to control brushless DC motors. Typically there are six discrete FETs, a driver IC, and a small MCU to sequence things. Typical currents ...
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1 vote
0 answers
63 views

Why does reciprocating compressor's motor starting winding have high voltage than running winding

I want to know why the starting winding of (2 ton) reciprocating compressor's motor have high voltage than running winding? I have attached the voltage that I have captured from oscilloscope. This ...
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0 answers
42 views

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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1 vote
0 answers
38 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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1 vote
1 answer
119 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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-1 votes
1 answer
60 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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1 vote
2 answers
80 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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0 votes
0 answers
172 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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1 vote
1 answer
215 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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0 answers
45 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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0 votes
0 answers
91 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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2 votes
1 answer
257 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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0 answers
83 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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  • 299
1 vote
1 answer
82 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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2 votes
2 answers
492 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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2 votes
1 answer
425 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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1 vote
0 answers
35 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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