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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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30 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
68 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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1answer
45 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
42 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
36 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
82 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
13 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
58 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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0answers
50 views

How to remove PWM noise from my speed sensor wires?

I'm driving a brushed DC motor via PWM at 5kHz. I'm also measuring the speed of the motor. When I try to sample the speed, sometimes I'm getting a value of 5kHz, which is exactly my PWM frequency. ...
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1answer
42 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
88 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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15 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
34 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
47 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
48 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
39 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
86 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
24 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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0answers
38 views

H-bridge using HCPL3180

I need help with my project which consists of designing an H-bridge with PWM. So far, I have designed half of an H-bridge, however I am not sure if this is correct. Can somebody guide me into the ...
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2answers
711 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
45 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
31 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
42 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
35 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 ...
2
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2answers
149 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
18 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
161 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
42 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
223 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
147 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
29 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
106 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 ...
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0answers
34 views

Switched Reluctance Motor

I am currently working on a project on control of Switched Reluctance Motor(SRM). So far, I have been able to run the motor using simple Arduino control by generating pulses for each phase accordingly,...
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3answers
52 views

Difference between lower and higher current rated ESCs and electric skateboard questions

I am starting a project and would like to build an electric skateboard. Here are the specs for the parts that I have gathered so far: a. Two 90mm wheels that each contain a built-in BLDC motor. The ...
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0answers
27 views

Powering on ESC causes backfeeding on PWM line

This question is on behalf of the robotics team I am a part of. Our robot's electrical system has been working great. However, we noticed that once in a while our Teensy or Raspberry PI would crash ...
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1answer
29 views

Can you use a 3ph BLDC controller without a potentiometer?

I'm attempting to build a 12v fan and I'm looking at controllers to drive the 3 phases of the motor. It seems every ESC i find has a potentiometer included. I want my fan to always run at full speed ...
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1answer
41 views

How are ESCs (for BLDC motors) different from Texas Instruments sensorless Instaspin kits?

I have never used an ESC before but are they current (torque controlled) or speed controlled? If we vary the load suddenly ,will it stop or it can identify the rotor position and maintain the speed ? ...
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0answers
30 views

Meaning of these terms - Simulation of vector control (FOC) of induction motor?

I'm having hard time doing simulation of vector control for 3 phase asynchronous machine. I was studying MATLAB - Simulink simulations available already on MathWorks site but I couldn't understand ...
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2answers
58 views

What makes an alternating-current electric motor rotate in a preferred direction?

Intuitively, from a position of ignorance about the design of AC motors, I would have expected the direction of rotation to vary randomly with each start-up. This appears to be the case for motors ...
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1answer
111 views

MOSFET H-Bridge Design - Capacitor/Diode/Resistor Selection

welcome to my first post! I am designing a small 3-phase Brushless DC Electronic Speed Controller (ESC). The design utilizes 3 half bridges and a FAN7388 driver IC. The FAN7388 datasheet has a ...
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1answer
31 views

What is a (side) current alarm?

On the technical sheet of a motor controller integrating two BTS7960B (picture below), the description of the 8 PINs on the board is as follows: RPWM: Forward level or PWM signal input, active HIGH ...
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2answers
81 views

Can I power 4 DC motors with an AC/DC Adapter?

I have 4 24v DC motors that I would supply with a 24V 5A AC adapter I have 2 L289N motor driver board though so I wont be connecting them directly to the adapter. Question: Is it safe if I power the ...
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0answers
35 views

H Bridge Outputs correct voltage, but the Motor doesn't function when connected. The Motor does work when power is supplied directly

I am building a bluetooth controlled car with an arduino Uno, and I am powering the motors with a 6V battery. The H Bridge I am using to control the motors is an ST L293E, and I am following this ...
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1answer
144 views

Controlling 5V DC motor with 9V and PWM

I'm trying to make myself a controllable fan with 5V DC motor. I use 9V battery for supply the motor and PWM Modulator. This is the PWM module that I use. And I'm using this circuit schematic. ...
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2answers
94 views

Minimum components for BJT (edit: or FET) H-Bridge applied to a small 3-6V motor controlled by Arduino

First, why did he put R3 high--alone: H-Bridge Transistor Smoking? My real question is about the minimum number of parts. I believe the minimum components for a BJT H-Bridge applied to a small 3-6V ...
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1answer
52 views

Mosfet drive heating issue

I am trying to drive a motor/lamp (10 Amp Max). The voltage across the load will be controlled via an N-Mosfet. I started building the mosfet drive part and I'm kinda stuck. simulate this circuit &...
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2answers
235 views

Ceiling Fan Speed Control stripped down

I am a novice but know enough to get by. I was given an older Hunter Fan that is only operated via Remote. I have cut the receiver out because I do not have the remote and from what I have read they ...
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1answer
77 views

Measuring load resistance/inductance in an electric motor

How do I go about finding the load resistance and load inductance of a brushed DC electric motor? I would guess that: Load resistance = Operating voltage / Load current These values you can find in ...
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0answers
19 views

Problems in simulating current model flux observer

I want to estimate rotor flux in 3 phase induction machine using Blaschke's equations. Here's the current model I'm suppose to simulate.:. I have to simulate this thing, I successfully obtained iqss ...
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0answers
135 views

Sensorless FOC position observer error

I am designing my own FOC (field oriented control) system, and I am trying to implement sensorless control. I have successfully implemented sensored FOC with my system on two different motors using ...