Questions tagged [motor-controller]

Any circuit for driving a motor that's more complex than wiring it to a power source through a simple on/off switch. Examples include speed and torque control using H-bridges, brushless motor controllers, stepper controllers, VFDs. Constant speed examples include relay control, reversing, reduced-voltage starting, overload protection and other control requirements more complex than a simple 0n/off switch.

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1answer
78 views

H-Bridge shoot through at high voltage problem - Don't know the cause

I have this H-bridge circuit The circuit is for driving a 180VDC motor, it is built to taking in the High Bus voltage from 169VDC to 340VDC. it works with no problem up to 310VDC. However, at 340VDC, ...
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1answer
69 views

Controlling multiple stepper motors using a single driver

I want to control ~50 stepper motors using a single driver, and use only one Arduino pin to control each motor. Currently I'm using a single A4988 driver and a couple of 12v 1amp stepper motors to ...
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2answers
61 views

Control design for a brushless dc motor

I want to perform a speed control for a 1500W brushless DC motor. The documentation and videos I've seen use arduino uno and are for smaller engines. I would like to carry out this project without ...
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1answer
38 views

BLDC hall sensor angle

the hall sensor of the bldc motor will give 6 states (represents the 0 to 360 electrical cycle). But what is the exact angle of the each state (that is for 101= ? degree, 100= ? degree....) I googled ...
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1answer
32 views

Can I extend my ESC to motor using some thick wire? is it possible to do in that way

I'm doing a drone project for my academics. my arm of the drone is a little bit longer. How can extend my ESC? I watched extending a power-ESC cable will make problem, but increase ESC-Motor cable ...
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1answer
34 views

How to find the transfer function of this digital controller and DC Motor?

I am studying digital control theory and struggling with a particular diagram of a digital control system. The system is presented below: \$D(z)\$ is a digital compensator, \$G_{h0}\$ is a zero order ...
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98 views

Old 3 wire stepper motor

So I have this stepper motor from an 80's chromatograph that is controlled only with 3 wires. My task is to get it to work, yet I have no idea how. The wire output has 6 wires, 2 of which I believe ...
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1answer
46 views

What value of inductance and type of inductor should i choose for my motor driver circuit? [closed]

I am current design a DC motor driver circuit for 24 volts and 50 amperes since the motors I am using take 25 amperes nominally. I will be using PWM signal to control the output. I was suggested to ...
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1answer
47 views

How to specify throttle range of RC ESC?

I've bought some cheap ESC's off banggood in order to build a drone. Now I'm trying controlling them using an Arduino. I just can't figure out how to use them properly. The ESC is called XXD HW30. ...
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0answers
30 views

Electric speed controller (ESC) interruption with FET

I would like to develop power distribution board for quadcopters. One of the task of this board is to interrupt power from battery going to ESC when the copter sleeps. The battery will never unplugged ...
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1answer
73 views

spwm look up table {For bldc control}

I am trying to implement sinusoidal control in BLDC motor. After doing some research about sine wave controller. spwm and svpwm are the better controlling methods for sine wave controller. So I first ...
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1answer
53 views

Using motor encoder with VESC

I want to use this BLDC motor on a project. In its datasheet, the encoder pin sequence is shown as follows. I want to control this motor with a VESC. There is an overview of the board here. In it, ...
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1answer
48 views

Ebike brake lever cutoff switch / interrupt switch : How does it work? [closed]

When pressing the brake lever on my ebike the BLDC motor controller (aka ebike controller) 'cuts power' to the motor until the brake lever is released again/sensor is deactivated. I would love to know ...
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1answer
53 views

Is there a reason to use 4 diodes instead of 2 when controlling a motor with L293B?

I am looking at the datasheet of L293B and there are some usage examples provided in it: Is there a reason to use 4 diodes instead of just 2? Why are these connections needed here in the first place?...
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0answers
45 views

Diagnose brushless three phase motor controller

Can I test somehow if my brushless motor controller works? After some time of playing with it and with the three phases motor from old HHD, this pair just stops working. LED is on, but nothing more ...
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1answer
58 views

ESC signal standard and PWM frequency

I got the following code from the video. However, I encountered an issue that, the motor tended to stop working at maximum value. ...
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5answers
125 views

Small 5V BLDC motor controller - 6 mosfet IC

I am creating follow focus system (motor with gears that moves camera lens ring). I think the best choice is BLDC motor (DC geared are too loud, stepper don't have enough torque or too big). I need ...
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1answer
35 views

fan speed regulation causes other loads flickkering

I am using traic based dimmer circuit for regulating my ceiling fan. when the fan is regulated to low speed the other loads(incandescent,tube light,LED) in the room are flickering. when i increase the ...
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1answer
36 views

How to use arduino control an ESC and flash?

Basically, I want to use PWM wave or something alike from Arduino to directly control the speed of a brushless motor through an ESC. I saw an example on the Arduino Brushless Motor Control Tutorial | ...
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0answers
69 views

Replace potentiometer in AC motor controller

Update II Since no one answers, I am updating my findings for posteriority. After making sure that I would not blow up my scope, I hooked it up across pins 1 and 3 of the potentiometer. I found that ...
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0answers
18 views

Simple Synchronous Rectification of Unidirectional Motor?

I'm trying to drive a high current, low voltage motor (24V 100A cont.). It previously used a very large and overpowered H-Bridge (16 FETs). The system only can rotate 1 direction, and is required to ...
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2answers
72 views

Motor stall detector with a voltage divider in parallel to the motor and ADC: it does not work as expected

I'm trying to replicate a motor stall detector I found on a PCB of a commercial device (chinese). This is the schematic: I'm using an ESP8266, resistors with same value as in schematic, two MMBT3906 ...
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1answer
45 views

L6202 H-bridge keeps breaking when switching directions

I chose to use the L6202 H-bridge IC because it has built in dead time as well a thermal shutdown protection. However I've already broken multiple of these from what appears to be current spikes when ...
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0answers
37 views

Firing Triac strategy for motor phase control

I try to design a replacement potter's wheel motor controller for an old potter wheel. I have solve some problem and I am able to control the phase standard of filament light. Now I try my board on ...
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0answers
52 views

DC Motor doesn't change from lock to unlock

Can someone tell me why the motor doesn't change from lock to unlock? I designed a PCB circuit wich controlls the Motor movements and Lock. The motor has a magnetic lock. When switch to Unlock mode , ...
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1answer
37 views

How does a servo amplifier with Step/Dir Interface calculate feed-forward terms?

My Question is related only to servo systems that still use step/dir as input. Consider a typical advanced servo loop of an amplifier in the figure below: (source: "Mechatronics system Control and ...
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1answer
82 views

What is the opposite of pulse width modulation called?

If I want to control a motor by simply giving it a variable specific voltage or current, to control the RPM, not by flipping the power on and off as in pulse width modulation, what is that called?
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1answer
44 views

FOC current and speed limits

I am trying to simulate BLDC drive using FOC with svPWM. The drive works very well in the continous operating regions, however i also want to include current and speed limits on the simulation. I have ...
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2answers
58 views

What kind of battery to choose for my electrical car project

I hope that this is the right place to ask this. I have a small RC car that I opened and added a raspberry pi in. Now I want to pick a battery. First of all I heard that Lipo batteries are really ...
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0answers
20 views

Coupled interruption control for multiple closed loop steppers

I need some advice to make an interruption control system for my stepper motor drivers. I should probably add that I am rather poorly trained in electronics but eager to learn, so basic explications ...
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0answers
37 views

Design of a controller

I am working on a project that requires me to design a controller knowing the following specifications: "The controller performance must be consistent under varying conditions. The rotor must respond ...
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1answer
38 views

DQ currents of BLDC

I am trying to apply FOC scheme with SVPWM for controlling a BLDC and comparing the resuls with trapezoidal commutation. I have my BLDC model and it is working correctly with trapezoidal commutation. ...
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1answer
138 views

Sewing machine speed and needle position control over arduino

I need control sewing machine speed and needle position over arduino project. Current sewing machine is: Brother X5, with 70 Watt motor with foot pedal control. Speed of motor will controlling by ...
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2answers
118 views

Using an IGBT with a small ESC for large BLDC

I think I have a modest understanding of how an ESC for RC hobby crafts works, and how a BLDC motor works. I've been wondering about how to make an ESC that could run a motor with large current ...
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1answer
64 views

Running a 36V motor controller on li-ion [closed]

I recently bought a 36V BLDC motor controller (the $10 ones from ebay) without taking into consideration that when fully charged my battery voltage is actually 42V. I found a similar question where ...
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1answer
40 views

How to calculate V/f value for an Induction motor?

I want to implement constant V/f in variable speed Inverter of a 3-phase Induction motor, 1500 rpm, 4-poles. I also know the equation: V/f = 4.44 × N x Phi Phi is maximum value of flux, f is ...
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1answer
55 views

Why would a motor manufacturer offer multiple coil winding types?

I'm currently looking through a part catalog from a motor manufacturer and notice that you can purchase this motor with different motor winding types. Specifically, you can order the motor coil wound ...
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3answers
97 views

Can an ESC-rectifier combination be used as a replacement for a buck converter?

I am working on a project that involves a DC-DC power step-down. The details are as follows : Input : 48V , 15A Output : 18V ( around 700W ; due to losses) However, I could not get any buck ...
0
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1answer
72 views

Purpose of an Electronic Speed Controller(ESC)

I need to implement a brushless dc motor and I know the motor needs to need constant control to ensure that consistent torque is applied to the rotor. What control does the ESC provide and what ...
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2answers
52 views

How do I supply 200-ish mA to servo connected with Adafruit's PCA9685?

For a project in school I have to build a robot playing a bass guitar. To play the notes I planned to plug 16 servos to Adafruit's PCA9685 but it doesn't supply enough Amps to the servos. How can I ...
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2answers
71 views

Suppressing sparks when powering motor controller

When I connect a 36V Li-Ion battery source to a cheap eBay DC motor controller, there's a significant spark on the wire, regardless of connected components. Should I: 1) Add capacitors to the input ...
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2answers
218 views

Feeding microcontroller and linear actuators (motors) with the same power supply

I have already made a diagram using a motor controller. The details of the actuators are: Input voltage: 12VDC Max Load: 750N(168.607lbs) Stroke Length: 16 inch Travel Speed: 12mm/s Duty Cyle: 25%. ...
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4answers
1k views

Is there a way to tell what frequency I need a PWM to be?

I have a 12V DC motor that turns at 60 RPMs or 1 Hz. Do I need a PWM that matches the frequency in order for it to work? Most of the ones I've seen are around 25 kHz for a 12V 20A motor.
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0answers
21 views

Swapping Park and Clark Transforms

In the 3-phase Vector Control of AC motor if we swap the order of Park and Clark transforms (as well as their inverse transforms) will we get the same result or will we get meaningless output?
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1answer
125 views

“Motor PWM” vs “LED PWM” on the ESP32

The ESP32 data sheet talks about "Motor PWM" vs "LED PWM". The "LED PWM" seems to be a quite straightforward feed-forward circuit, while the "Motor PWM" also has "three fault detection signals, three ...
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0answers
43 views

why wouldn't a 9-60DCV 20A PWM motor control work to control a 12v 20A wiper motor [duplicate]

I have a question regarding controlling the speed of a wiper motor with a PWM vs wiring in a rheostat in the positive side. I have a 110ACV-12DCV 20A converter going to a 9-60DCV 20A PWM motor ...
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3answers
663 views

Is it possible to account for motor dead-band in a Laplace model of a feedback DC motor system?

For practical DC motors having dead-band effects, where the output angular speed of the DC motor remains zero until a large-enough DC voltage is applied to the motor system --- is it possible to ...
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1answer
59 views

ESC control with Raspberry Pi

I'm trying to control some ESC and brushless motors using a raspberry pi. I used the pigpio library to control them using servo pulses. But it seems that my motors wont increase rpm after a limit ...
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0answers
43 views

Nonlinear Observer Question for BLDC

I'm looking at the article posted here, and I'm trying to figure out what it is that they're controlling and how. Specifically, Dave Wilson from TI gave a presentation called "Teaching Old Motors New ...
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1answer
68 views

Help with brake in motor control

I have build a simple motor control for a brushed DC motor for my robotic mower. The motor is feed with a PWM signal and when the cutter should stop you just pull the PWM signal low to stop the motor ...

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