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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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75 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
34 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
32 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
21 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
36 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
28 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
19 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
45 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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29 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
55 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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22 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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47 views

level-shifting a 5V pwm signal to 10V for speed-controller using a mosfet - looking for help solving voltage drop problem.

I have tried to solve this by googling, reading datasheets and discussion. Made a bunch of breadboard designs and finally got one do what it's supposed to on the breadboard. But suffers a voltage drop ...
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1answer
77 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
32 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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0answers
22 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
40 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
45 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
46 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
60 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
31 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
169 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
96 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 ...
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1answer
61 views

BLDC Motor rotor vibrates with audible high pitch beep, but does not spin. Controlled by custom motor controller

The circuit I have built (taken from the HIP4086A gate driver data sheet found at https://www.intersil.com/content/dam/intersil/documents/hip4/hip4086-a.pdf) is: The only difference between this ...
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2answers
89 views

Is a Switched Reluctance Motor (SRM) a AC motor or a DC motor?

Is the current in a coil of an SRM alternating or not? I understand that we are giving a DC supply (say battery) but isn't the current reversing its direction. If yes, then it would be called AC but ...
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1answer
102 views

microcontroller is “hanging” when it is feeding PWM to a DC motor controller

I am using linear potentiometer to control the speed of a DC motor. I am using the following schematic. An ATmega328P receives the value from linear potentiometer via analog read. This ATmega328P ...
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1answer
18 views

Polyphase motor with VFD

I purchased a dayton 1/3 hp 1725rpm and am wondering how to use it with a VFD. It says continuious as duty. I only have 220 at my house so I am wondering if i can set it up with a VFD and use it to ...
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1answer
67 views

How to generate a clock for my ring counter?

I want to run a 4 phase switched reluctance motor at low speed. The expected conduction sequence for the motor winding(y, r, b, g) follows the output similar to that of a 4-bit ring counter and thus I ...
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1answer
44 views

Question on PID for speed control of DC motor in treadmill application

In treadmill applications with DC motor, you can't go from 0.5 mph to 1 mph instantly. The speed should be gradually increasing. If I want to design a PID for speed control, my setpoint should be a ...
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1answer
103 views

What could cause the mosfet to burn out in my motor driver?

Here's the schematic: I've tried to make this motor driver as tough as possible, but I'm still seeing occasional failures where the MOSFET and the diode D1 are both failed short. Any ideas what ...
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0answers
16 views

Physical significance of the 0-axis in Park transformation

What is the physical significance of the 0-axis in dq0 transformation (Park transformation)? Is it the same as 'zero sequence component' in the symmetrical component analysis. Can somebody provide ...
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1answer
40 views

Is this basic schema of a brushless driver correct?

So you have the "logic" part that runs at 0-5V. The controller is a microprocessor that can read out the current monitors and respond to them by changing the voltages by changing the connection of the ...
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1answer
112 views

BLDC (Brushless DC Motor) vs PMSM (Permanent Magnet Synchornous Motor)

The differences between BLDC and PMSM are very small and for what I have seen while reading about it, is not clear to many of us. Most of the articles I have read say that the main difference is that ...
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2answers
119 views

What PWM inputs are needed to drive a 3 phase BLDC using the HIP4086 IC driver chip?

I am building a motor controller for a BLDC (w/ Hall sensors) using a Teensy. My circuit looks like the typical application diagram in the datasheet (https://www.intersil.com/content/dam/Intersil/...
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1answer
45 views

modeling of a dc motor with load

I designed a robot. It consists of an actuator, linkage and a camera. the actuator is considered as a dc motor in this problem. I need to identify this system. how can I find a model for actuator and ...
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2answers
92 views

Why is my DC motor losing torque when over voltaged

I have these small dc TAMIYA motors rated at 3v at around 2-3 amps. I also have a driver that I'm planning to use to drive the motor. https://www.pololu.com/product/2992 I could not find any other ...
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1answer
28 views

Brushless motor esc and voltage [closed]

If brushless motor work in 22.2 volt , if I provide the ESC with 24 volt Is there a problem ? Thanks
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3answers
776 views

How is air conditioner room unit fan motor controlled?

I have a custom project where I need to control fan speed with Raspberry Pi according to data it gets from various sensors. At first I need to know what my motor needs. For fans I use old air ...
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2answers
48 views

Limiting the speed of an induction generator

A turbine (whose angular speed must not exceed \$\omega_{max}\$) is driving a 3-phase induction generator. I envisage the generator's electrical output being monitored by a circuit that reacts to ...
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1answer
35 views

Syren 10 A motor driver stopped working [closed]

While I was measuring current going in the motor terminals , sparking occurred and the power supply also stopped working including the motor driver, as soon as I connected multimeter across motor ...
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2answers
46 views

MC33926 Motor Control Feedback Reporting Too High

I'm using an MC33926 motor controller that has a feedback pin which current mirrors the motor current. According to the data sheet the mirror is 0.24% of the actual current, so the FB pin should ...
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1answer
44 views

Control stepper motor with PLC?

I'm pretty much brand new to both stepper motors and PLC's and electrical in general, although I have an idea of the theory of how they work/what they do. I am trying to achieve is to be able to have ...
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2answers
158 views

Is Axial Gap (pancake) motor better for servo drive applications?

I heard from someone that axial gap /pancake motors (lynch or etek) are better for servo control (speed and position) than standard radial flux DC motors. Both motors are brushed type. I don't ...
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0answers
26 views

Motor Control - Counter design for the control circuit

I want to design a Johnson/ring counter circuit for control of my sr motor. Until now I have got this information, which I have tabulated in the following waveforms I am attaching for the reference:- ...
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4answers
309 views

How to control a motor driver (BTS7960) without PWM

Using a Raspberry Pi 3B+, I need to control a motor which works in 12V and can draw up to 2A. It doesn't use PWM. It just goes in one direction or the other (reverse/forward) when interchanging the +/-...
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1answer
52 views

SVPWM Zero Vector Braking?

I have some trouble in understandy Space Vector PWM (SVPWM) with the zero vector. To modulate the amplitude of the vector, the zero vector (000) or (111) is applied for a certain time. This means, ...
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4answers
422 views

Servo PWM: Why 20 ms period?

I'm working with ESC controllers which receive PWM signals that are very similar to those that control a standard Servo motor, i.e. a 50 Hz PWM signal (20 ms period) with duty cycle of 5-10% (1-2 ms ...
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1answer
249 views

Measuring speed with Input Capture Mode [STM32 & CubeMx]

I have the L432KC Nucleo. I'm trying to measure low speeds with a 1 PPR (pulse per revolution) sensor. For low PPRs, using the Period Measurement Method is suggested. If I get the period of the signal,...
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1answer
34 views

Braking Chopper necessary for BLDC controller?

I'm developing a BLDC driver, which will provide up to 200W at a maximum of 7A. Now I'm not sure if i really need a braking chopper included, because the power is actually quite low, but ofc when a ...
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2answers
108 views

H-bridge motor controller [closed]

I made a circuit but I am not sure it is going to work. The circuit is supposed to drive a 36 V 28.5 A motor. I am having trouble finding out if applying 5V to IRLZ44PBF would open it fully and allow ...