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Questions tagged [motor-controller]

Any circuit for driving a motor that's more complex than wiring it to a power source. H-bridges, brushless motor controllers, stepper controllers, VFDs, etc.

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15 views

3 Phase PMSM Motor Current Measurement: Figuring out the 2 negative terminal currents with 1 positive current measurement

I am trying to implement F.O.C for a PMSM machine with a custom made inverter board. The H-bridges are from Infineon (IFX007T) and they provide current sensing capabilities. The problem is, i need the ...
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2answers
87 views

Why does the MIT Racecar not use the build in ESC?

MIT has build an autonomous RC race car. They put everything on GitHub. I have a similar project and therefor build one of those for my self (Almost the same but without TX1 and Sensors). I am ...
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7 views

Picking the correct TVS for full H-Bridge Motor Driver

I'm building a full h-bridge using a HIP4081A and IRF1405 MOSFETs that will drive brushed DC motors (design based on Open Source Motor Controller project). This will be powered by a 12V power supply (...
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4answers
125 views

What is meant by derating in this context?

At page 33 of this motor driver there is a section includes the term derating due to temperature: What is meant by continuous current derating 4% per Kelvin in this context? Does that mean the motor ...
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1answer
21 views

(RasPi) Trying to control 2 different water pumps with different relays

PS: This is for a school project and I'm not very experienced with electronics. I'm trying to create a flush system. I need to control 2 different motors, it's a single iteration circuit with a timer,...
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1answer
70 views

L9110 12V Getting hot

I want to use the L9110 to drive 12V solenoids using my Arduino Uno. I bought this module to test with but ultimately want to design my own board. I desoldered the pull ups so I wouldn't be pulling my ...
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121 views

I have designed and 3D printed a new motor that was based on a video i saw earlier, however motor keeps stuttering and wont turn, what went wrong?

Figure 1 Figure2 I started by doing 150 turns on each coil making sure they were winded in the same direction, then connected the starting point of each coil together and took each phase winding to ...
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22 views

PMSM motor current calculated by D axis and Q axis current

Now, I know d and q axis current can be calculated by phase current ia, ib, ic in a PMSM, via clarke transform and park transform. ialpha = sqrt(2/3) * (ia - ib / 2 - ic / 2) ibeta = sqrt(1/2) * (ib ...
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89 views

About how to extract back EMF from SMO(sliding mode observer), maybe I need a doctor for this question

The equations of PMSM on alpha-beta frame(2 fixed coordinate systems) are like this, ...
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1answer
51 views

Powering 36V motor with 48V LiPo battery through a motor controller [closed]

I am planning to use 36V BLDC motors from a hoverboard, (this one) with this motor controller. The controller mentioned can handle up to 50V, 60A continuous. I would appreciate it if someone can ...
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37 views

Can I use regular motors with a stepper motor driver?

So I am doing a project for school that involves making a sort of car-thing with a Raspberry Pi, getting the idea from projects.raspberrypi.org. I wasn't able to order the suggested pieces online, so ...
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1answer
44 views

Channel 4 in STM32 Advance Timers TIM1 and TIM8 [closed]

There are advance control timers in STM32 family as in STM32F407 and these are specially suited for 3-phase (or 1-phase also) motor control applications using full H-bridge. These timers provide ...
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1answer
63 views

DC Motor Controller using only one button?

I have been trying to create a DC motor controller that can do numerous actions with just the use of one button. Basically when I click it has to go on way, when I click again it has to stop, and ...
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0answers
26 views

Shorting the output of both the channels of L298N

Suppose I started with a project requiring the control of motors and ended with using L298N in my project, realizing that my motor only takes around 1.5A when on load. Now, with time I realized that ...
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2answers
49 views

4 axis quadrature encoders? [closed]

I am currently working on a digital input card which will feature quadrature encoder inputs. To my (basic) knowledge, quad encoders use two pulse trains that are 90 degrees out of phase with each ...
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0answers
57 views

Circuit for Neutral point of 3-Phase mains

I wonder if the 'Neutral Point' as mentioned in the attached image is correctly labeled or not? Is there any mistake in this 3-phase circuit design? Edit 1: Also it looks like the 'Neutral point' is ...
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1answer
46 views

SOPs for converting a digital circuit from 5V to 3.3V

I am in the middle of an exercise in which I have to upgrade an old motor driver circuit. The old circuit has an MCU and all its logic based on Vdd=5V. I have to use a new MCU whose Vdd=3.3V. So now I ...
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0answers
49 views

24V, 3 Phase BDCM Controller Schematic

This may seem like a dumb question, but does anyone have a schematic for a BDCM controller. All I seem to be able to find are partial schematics or schematics that include a micro controller. My ...
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0answers
32 views

SVPWM Primer for ACIM

As I am trying to implement a speed control for ACIM using SVPWM. I could not find out a focused primer on what exactly is a SVPWM technique and how is it implemented in an MCU like STM32F4? All the ...
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47 views

FOC Control vs SVPWM

I wonder how far the similarities go between FOC control and SVPWM modulation and from which point on wards they are different from each other? edit: Can anyone point out a very basic primer from ...
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0answers
118 views

IR2301 HO output staying on too long

I'm trying to make a 3 phase motor controller with IR2301 and IRFPC50 MOSFET. I connected everything according to IR2301 datasheet. For capacitors I’m using 10 uF (between VCC and GND) and 2.2uF (...
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76 views

Transfer function of DC Motor

I'm trying to verify whether the transfer function in this control diagram is the one stated in this document. I tried solving it and got this: Shifting the armature current \$I_a\$ feedback point ...
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4answers
1k views

Motor fader PID control

I'm trying to control a motorized fader (linear slide potentiometer) using an Arduino. PID control gives good results for "jumping" to a specific target position, but tracking ramps is a problem, it's ...
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1answer
25 views

High Power DC motor current control

I need to monitor a high power DC motor with 48V and 600A battery, if it's stalled or not (its a lift truck). The driver is 25 parallel MOSFET with Rds(on)=7.6e-47 which control by 15kHz PWM. I think ...
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2answers
123 views

Torque and speed control of a DC motor

I'm new to electronics and this is my first post so please be patient with me. Introduction I am required to design a rehabilitative exoskeleton-like knee-brace to assist sit to stand, I have faced ...
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1answer
36 views

DC Motor Controller: hacking it bidirectional?

I just picked up two of these DC motor controllers (https://www.amazon.ca/Controller-Yeeco-Universal-0-01-1000W-Generator/dp/B00RZ97DDQ/ref=sr_1_10?dd=1QzB1w0bE3cxmYrmXew-NA%2C%2C&ie=UTF8&qid=...
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1answer
41 views

Power-down sequencing with a “hard” power switch (stepper driver)

I'm designing a stepper motor controller and would like to have some advice on sequencing the shutdown process with a "hard" power switch. The Toshiba TB6560 driver that I'm using requires a specific ...
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2answers
62 views

AC motor must be run off inverted DC?

I am looking at the datasheet for a motor. This is an AC induction motor designed for use in electric vehicles. It includes the statement [my emphasis]: The motors are designed for installation in ...
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1answer
77 views

Is this notation for a single capacitor or a dual capacitor?

So Im trying to repair the indoor fan on our ducted AC system (2 weeks wait to get it replaced on warranty). Capacity has exploded. I replaced it with a similar cap (8uF 400v) and wired it the same as ...
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1answer
43 views

How to change a predefined PWM frequency?

I have a controller which has predefined PWM frequency of 150 Hz. This output is used to control a motor. However, I want to use another PWM frequency, but I can not change the PWM frequency on my ...
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0answers
33 views

Is it possible to electronically control the physical speed switch on air movers?

I have a few consumer level air movers (Xpower) that have a 3 speed physical switch. Is there a way I could replace the physical switch with something that would interface with a microcontroller to ...
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1answer
32 views

Fuse needed to prevent too much current draw in DC motors?

I am building a basic Raspberry Pi robot: the Pi controls the enable pins on a dual-bridge motor controller bridge via PWM and sets the input pins for direction. I have a variety of battery options ...
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2answers
53 views

Poles of induction motor rotor

For a three phase squirrel cage induction motor (IM,) we can have 2 or 4 or 6 etc. pole pairs on its stator and when these stator windings are energized by 3 phase mains supply then we get a rotating ...
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2answers
34 views

Induction Motor Poles and Drive Configuration

If an IM is driven by a VVVF drive and the poles of the motor do not match with the drive configs.. eg., IM is 4 poles but the drive setting is 2 poles.. or the other way around.. then can it create a ...
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1answer
25 views

DQ Currents in the Induction Motor Model

While studying the Induction Motor modelling and also its Vector control using DQ currents decoupling method.. I am finding it hard to see which current is which on the model diagrams. Can anyone ...
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1answer
75 views

FOC sensor vs sensorless

I am trying to understand the hardware difference between the sensored and sensorless FOC 3-phase Induction Motor Drive circuit. So far what I understand is that FOC require following sensors: 1. ...
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0answers
37 views

L298N motor driver output error

I had worked previously on a project which used a L298N motor driver to control motors.Datasheet Link. I have now completed my project and started with the production phase of it. But while I was ...
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1answer
194 views

Difference between Field Oriented Control and Direct Torque Control

What is the fundamental difference between Field Oriented Control (FOC) and Direct Torque Control (DTC) (say for an induction motor)? Is it really the same as described in https://www.researchgate.net/...
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27 views

IGBT Power Calculation in motor control application

My DC motor's nameplate says: VOLTS: 125 AMPS: 27A HP: 4 HP RPM: 5000 RPM DUTY: CONT. I chose this IGBT IKW50N60DTP to drive the motor with a PWM frequency of 5 kHz using a single-quadrant ...
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1answer
308 views

MX1508 motor driver module

I recently bought this MX1508 module from AliExpress. I'm very impressed by its working given the low product cost. I would like to implement this in my next design, but I'm unable to find any ...
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1answer
18 views

Dimming LED with speed controller

I'm trying to controll 4 parallel 12V DC LED strips with an speedcontroller. I am able to dim the lights from 100% lit to about 5% lit, but it never turns them off completely. My multimeter can't ...
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0answers
46 views

DC motor speed calibration

I have seen some treadmills with DC motors that have an option in the console to calibrate the speed sensor by making the motor run from 0 to max speed. Also, some of them have an external ...
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1answer
34 views

MC33926 Motor Control Rise Time

I am using a MC33926 motor controller. Unfortunately, I am not extremely familiar with motor controllers and have a question. The circuit below shows the circuit that I am working with. The drivers ...
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0answers
52 views

High frequency PWM methods

I have a few questions regarding generating PWM waveforms in audio and motor driving applications. I want to mess around a bit more with switching, gate driving circuitry and motor control/ ...
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0answers
49 views

Modelling a Braking DC Motor Speed Controller

I'm trying to simulate a brushed DC motor. The model comes from the following circuit diagram KVL yields: $$v = Ri + L \frac{di}{dt} + K_b \omega_m$$ My rudimentary understanding of speed ...
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0answers
102 views

Three phase motor driver DC link, DC bus capacitor values

I am designing a motor driver for a three phase brushless motor and have been looking for a capacitor value for the DC bus of this circuit (C1). Most of what I have found when researching deals with ...
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2answers
62 views

Am I on the right track with the 16F1704?

I am 100% new to PICs and I know I have a lot to learn. My end goal is to have a DC motor controller that will operate a motor in one direction only and with the push of one button have the motor run ...
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0answers
33 views

Is it a PI controller always a good solution for speed control in treadmills?

This topic got me confused again. I'm trying to regulate the speed of a treadmill, i.e, maintain the desired speed with load variations (the person on the tread). It's a PMDC motor. I have two ...
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2answers
183 views

PID Run Away Motor Control

I have a PID controlling a DC motor. I am attempting to control the speed of the motor very precisely. My controller allows me to change the direction of the motor and give it a pwm for speed. ...
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2answers
148 views

Question on Speed Control vs Torque Control

I'm controlling a Permanent Magnet DC motor with PWM for a treadmill. I'm using a reflective sensor with 6 pulses per rev to get a speed feedback. So I'm actually doing "speed control" directly, but ...