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
29 views

Review of system design of motor controlled by micro-controller with rechargeable battery

I trying to build a circuit to control the motor using the microcontroller, supplied by the battery that is rechargable. I identified the some of the components i.e. Battery PMIC, LDO, Motor Driver ...
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2answers
231 views

How to electrically brake a brushless motor

I'm sorry if this question is too stupid, unfortunately I have a very low experience with BLDC motors. I would like to use 4 x 350W, 24VDC brushless motor hubs for my wheeled robot (they are usually ...
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2answers
75 views

Small brushed DC motor speed falls off above a certain PWM frequency?

I'm using the kind of small brushed DC motor shown below. My MCU controls the motor using PWM via a DRV8833 motor driver, also shown below. If I set the PWM frequency very low, e.g. 10 Hz, the motor ...
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0answers
24 views

Control of two DC motor in parallel [closed]

I'm quite inexperienced in electronics, so I'll ask some more competent folks here. I own two 12V 50W brushed DC motors (https://www.amazon.it/EsportsMJJ-15000Rpm-Motoriduttore-Velocit%C3%A0-Elettrico/...
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1answer
33 views

Help replacing a physical joystick for motor control with a LabView program

I'd like to start by acknowledging the similarity of this question to this one, but I really need a more basic, step-by-step explanation. I am trying to help a student in my lab design a program to ...
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2answers
51 views

How to control braking circuit of the three phase voltage source inverter?

I have been developing a control software for the three phase voltage source inverter for three phase induction motor control. There is a requirement to implement regenerative braking algorithm where ...
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2answers
43 views

How can a BLDC motor respond to a specific dynamic load demand without changing the supply voltage? [duplicate]

Coming at BLDC motors from the theory side, my understanding has always been that they have a linear curve based on Kv, no-load current, and resistance, for a given applied voltage. Now the thing is, ...
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1answer
64 views

How does this DC Electric Motor Control Circuit Works

I'm trying to figure out how does this DC motor controller circuit works. The circuit originally controls 2 DC motors for lifting a table. I extracted section relating to one motor only. I added my ...
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0answers
100 views

Why do MOSFETs keep blowing after I replace them in a kickscooter controller?

I have a few Segway Ninebot ES4 kickscooter controllers that I would like to learn how to fix. Essentially at some point the motor ceased and seems to be fused, won't accelerate, won't brake, and even ...
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1answer
88 views

Controlling hundreds of motors using an arduino uno

I'm trying to build a haptic feedback suit, which requires me to control over about 576 vibration motors (24x24), using an arduino uno. I have no idea how to do this because the uno has only 13 gpio ...
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43 views

Running Treadmill motor without console/controller

1- How to run this motor with it's controller? I couldn't find the treadmill console, witch got all the speed, on-off buttons. The motor runs on 180VDC consuming 5A. 2- Is it OK to run motor on a ...
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2answers
46 views

Zero crossing circuit

I have made a simlpe zero crossing circuit to control the speef of a single phase AC fan through conduction angle control with a Triac. The circuit looks like this with the use of 4n25, an optocoupler:...
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1answer
47 views

How to identify duplicate vs original FETs

I am really confused about this topic. Wheather it's ok to use duplicate MOSFETs or not. Say for example my application requires to handle upto 20 amperes of motor current. Is it ok to use 100A or ...
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2answers
98 views

Arduino Fan Control: BJT vs MOSFET

I'm brainstorming an electronics project where an Arduino (ATMega32U4 chip) will control this Noctua NF-A12X25 5V fan. I thinking of getting the 3-pin non-pwm version over the 4-pin pwm version and ...
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0answers
17 views

Electric skateboard ESC and homemade battery pack

I am building an electric skateboard and it requires an 80A ESC and 22.2V Li-po battery to run. I found a video where a guy connected a bunch of 18650 Lithium Ion cells in series to form an equivalent ...
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1answer
30 views

AC Induction Motor Slip and Torque control Vs V/f control

I am trying to understand this github code for speed control of AC Induction Motor. It calculates slip value to adjust the speed of motor. I wonder if its the same thing that is called constant V/f ...
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50 views

How does a 5,000 watt hub motor differ from a 4,000 watt hub motor (Both BLDCs), when powered by a 72V 100Ah Lithium ion battery?

I'm trying to design a motorcycle conversion kit for an underprivileged population in a rural area. I'm currently looking at potential hub motors to be powered by my selected battery (as mentioned in ...
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0answers
61 views

Inverter using Arduino

My thesis is: designing a inverter Control Speed of 3 Phase Induction Motor*(I use arduino nano, 6n137, IR2184, IRF840 and SVPWM)* but the problem is my 3 phase output has very high frequency. when I ...
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1answer
34 views

Variac Vs Motor Control

I am a beginner. I want to purchase a variable AC power source for my personal lab, and I am having a lot of difficulties getting a good variac in my region whose shipping cost is not 5 times the ...
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0answers
31 views

How does electric vehicle motors control, torque and speeds beyond base speed?

I'm currently trying to design a electric vehicle motor controller for a Permanent Magnet Synchronous Motor and simulate it using MATLAB. I have considered using the Field Oriented Control (FOC) ...
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2answers
64 views

Controlling low DC voltage with high AC voltage

I replaced my existing manual roller blind switches with Wi-Fi-enabled touch ones and I'm facing an issue with properly fitting them in my setup. The manual roller blind switches operated on 16 VDC ...
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0answers
22 views

How to align rotor with stator d axis for pmsm motor for pmsm foc?

I am trying to develop an algorithm for field-oriented control of pmsm motor with hall sensors as position feedback. I am measuring the period of hall signals and calculating speed from it. ...
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1answer
31 views

Unable to use EMAX 20A ESC

I am trying to use EMAX 20A ESC (Electronic speed control), but it does not work. I am supposed to hear some beeps. It is a 3 phase ESC. 1) I am using 12V from a computer power supply instead of 11....
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1answer
68 views

How to automatically reverse the direction of a motor without human intervention?

I am working on this project where I have an arm at rest want a brushless DC motor (BLDC) to automatically reverse: (I've added an image and text above for a visual reference) Given that I am taking ...
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2answers
207 views

How does this old fan regulator circuit work?

I was on the lookout for an old fan regulator. I had heard that its power consumption was constant at all speeds. I could lay my hands on this 1970 regulator. It appears to be a transformer with ...
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2answers
40 views

Power recirculation rig using rectifiers and BLDC motors

I am currently trying to set up a rig to test my 3d printed gears under different torques and motor speeds. The power input side is going to be the BLDC motor, driven by a hobby ESC (BLHeli_32), ...
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0answers
31 views

Unsure of PWM frequency for HobbyWing Platinum-60A Brushless ESC

I want to program this ESC HobbyWing Platinum-60A Brushless ESC (Manual) I want to first try it using Arduino's Servo Library and then using STM32F4. From its manual: It says that it requires PWM ...
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2answers
67 views

Brake vs Coast in BLDC

I'm using Brushless DC Motor. what is the difference between Coast and rake in Brushless DC motors ? application of each ? and if there is consideration of motor speed when choosing one of them? If I ...
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1answer
61 views

How does HFI (high frequency injection) work with BLDC motors

How does HFI work with BLDC motors. In this video: VESC HFI: Sensorless position tracking at zero speed he explains how HFI works, however i don't get how it can work with motors that have trapezoid ...
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5answers
194 views

Why are two PID controllers needed for FOC (Field Oriented Control)?

I've been looking at code to do FOC and noticed that two PID controllers are usually used for torque control -- one that keeps Id near zero and another that maximises Iq. I understand why Id should ...
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2answers
51 views

Speed Controlling an AC motor

Hello I have an AC motor that i want to make a speed controller to, but before i start i want to make sure that it is possible with the type of motor i have. I do not want to waste the motor ...
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3answers
84 views

Analog voltage control via Microcontroller

I have a BLDC motor driver that's powered at 24v DC. The control for this driver is via a line that modulates speed based on the voltage applied (between 0 and 24v) so a voltage divider using a pot ...
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1answer
51 views

Electric Motor-drive type/setup recommendations needed. I need 90,000 rpm at the output shaft @ a power of 30kW.? [closed]

I am repurposing a car turbocharger to be driven by electric motor. It requires around 30kW, @90,000 rpm to function in the desired range. Which type of motor should I use? I'd probably have to use a ...
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0answers
19 views

Adjusting stroke range on LACT4-12V-20 motor

Is it possible to adjust the stroke range of LACT4-12V-20 when using jrk 21v3 to control it. The LACT4-12V-20 does not have feedback, so it is not possition controlled. I guess if this is possible ...
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1answer
43 views

Want to vary speed on 12 volt DC RV ceiling fan

I have a 700 cm 12 volt DC RV ceiling fan that can work using my 12 volt DC solar power system. I want to figure out a way to vary the speed of the fan.
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2answers
32 views

Serial Error Pololu Micro Maestro

I have build a solution that looks almost like this: The wires that does the communication between the Micro Maestro and the two Jrk's and the RoboClaw are not included, so this is not a perfect ...
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2answers
39 views

L293 DC Motor Driver : How to set up PWM

So Im using a L293 H bridge driver, to manage a DC Motors Speed and Direction. In every tutorial I see online people use the 1A and 2A inputs as the direction management inputs and the enable port as ...
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1answer
32 views

Measuring servo torque

has anyone ever attempted to measure servo torque using current? Basically if you have a robot you want to detect stall state and approximate force being applied.
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1answer
45 views

Digital to analog design question

I need some help with a circuit that will accept a digital input (0V-5V) and output 5V at 40mA for 200ms when the input goes high (5V), then drop to 20mA until the input drops low (0V.) I had thought ...
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0answers
17 views

How to model the ESC efficiency in part-throttle?

At the moment, I am trying to research the best Propulsion configuration for multiple combinations of batteries, ESCs, BLDC Motors and Propellers. I am so far able to calculate the full-throttle ...
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1answer
35 views

Brushed DC motor braking with speed controller

I've been getting some amazing info on this site so thanks for all the info so far! Onto my question. I know I can brake a dc motor by shorting the terminals but I also know how much current that ...
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2answers
99 views

Issues with 2 motors in series

I have two motors in series that are connected to a 36v speed controller. They are identical motors, 12vdc, 30000RPM. My problem is when applying power, 1 motor slowly drops in voltage until it ...
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0answers
23 views

Integrating a 3bar manual f\r switch and a Curtis 1204 controller for hybrid circuit on scale model Army Mule

I am seeking a wiring diagram that will integrate a 3 bar manual f\r switch with a Curtis 1204 solid state controller. I have looked high and low and cannot find this combination. I know that I can ...
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0answers
17 views

Problem with PMSM motor model in Simulink

Good afternoon, I have developed a Vector Control for a PMSM motor in Simulink using Simscape Electrical but my motor is not spinning. I have tried applying various speed values but nothing happens. ...
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1answer
27 views

Locked Anti Phase PWM and BLDC makes sense?

Locked Anti Phase PWM is used to drive brushed DC Motors, but does it make sense to use it for a BLDC, e.g. 3 Phase Motor?
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1answer
63 views

PNP too big of a voltage drop accross Collector Emitter

I have a rather simple circuit that acts as an overvoltage protection switch with an input control signal to enable/disable the output.On the final output I am driving a motor that consumes around 2A ...
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1answer
33 views

DPDT switch to control DPDT relay

this is a bit of a long shot but here goes. I need to buy a speed controller for an electric ride on car and I've had no success in finding one with a reverse polarity switch and one that also ...
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2answers
74 views

testing a schottky diode

I'm trying to find how i can test a schottky diode to check it's state but can only find info on 2 pin diodes. The particular diode is this: http://pdf.dzsc.com/2017/20161120/20161120081219688637.pdf ...
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0answers
14 views

Why is the torque non-constant Torque issue in my FOC algorithm (Simulink)?

I am trying to develop an FOC algorithm in Simulink (see image attached) but I am having extrange results in my simulation. My torque is not constant, when it should, but varying periodically (see ...
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1answer
62 views

BLDC motors, are hall sensors enough?

When controlling a BLDC motor which has hall sensors, are the hall sensors always enough when combined with suitable logic in software? Whether using Hi/Lo PWM block commutation or a sinusoidal wave ...

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