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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84 views

Is this design of a motor controller valid?

I am trying to design a compact robotic actuator. My main focus with this project is to reduce the amount of external wiring needed to do with robots. With that in mind, I have thought of the ...
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Interfacing with H-Bridge [closed]

I have the L298 H-Bridge which is really popular for hobbyists. Unfortunately, this chip is hard to find nowadays, so I searched for other alternatives. I searched <...
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1 answer
66 views

How do BLDC electronic speed controllers prevent arcing by motor inductance

I've learned that an electric speed controller switches battery voltage on and off on each phase to drive a BLDC motor and uses PWM to control speed. Then I have some confusion. The coils inside a ...
1 vote
0 answers
44 views

Brushed DC motor drive reverse-engineering

I have a mains powered brushed DC motor drive capable of 800-1000W (allegedly). I am using it to power a threadmill motor, for power tool application. The drive is quite simple and I worked out the ...
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Making 0.6 V DC from 12 V DC battery power for BLDC motor controller

I am going to operate a BLDC motor with 12 V battery power. I purchased motor including controller. The controller board needs low level 0.6 V DC to run the motor. How can I make it with lower cost? ...
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In modelling a motor-generator setup, is it necessary to do state space analysis on the coupled shaft?

I am developing a control system for a motor-generator setup. It is a Permanent Magnet DC motor coupled with a generator. First I have to model the setup and design a suitable controller with speed as ...
1 vote
0 answers
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What might it mean if all the voltage is dropping over this resistor?

I'm trying to repair a record player, here's the schematic for what I'm looking at: https://elektrotanya.com/PREVIEWS/63463243/23432455/pioneer/pioneer_pl-4_sch.pdf_1.png The problem is that the motor ...
0 votes
2 answers
56 views

FOC RPM control strange behaviour

so we have been struggling with a particular issue on our Motor controllers. Before i explain the issue in detail with pictures. Let me setup the context of the hardware we are using. Motor controller:...
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1 vote
1 answer
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Why does IR2110 IC keep shorting in motor control circuit?

I have been stuck on this problem for a long time. Close to 2.5 months now..... Please someone help a homie out. Here is my schematic exactly the way I have it wired (I will eventually use an actual ...
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1 answer
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Speed control in FOC system

I kinda understood how field-oriented control works but I have a question in my mind. How am I gonna control the speed of the motor? With which variable am I gonna be able to do that? For example, in ...
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1 answer
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H-bridge back EMF

I've built a H-bridge circuit to control a brushed DC motor. A schematic of the H-bridge is shown below: When designing the H-bridge I didn't add any diodes in parallel to the MOSFETs as I had ...
0 votes
1 answer
58 views

Vector control method

I am working on a motor control project. In the above picture there is an SVPWM generator. It is my understanding that the SVPWM generator block can be an SVPWM or a sinusoidal PWM or Sinusoidal PWM ...
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Why do BLDC motors require feedback, whereas AC motors do not?

I was delving into the functional difference between 3-phase AC motors and 3-phase BLDC motors, and was wondering what would happen if a BLDC motor was run without feedback to its controller. I found ...
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PWM motor control PIC18F4550 code

I am trying to build a PWM motor controller using a PIC18F4550 and I am new on PIC programming I need help to check and improve my code? My project details: I have two analog values from movement ...
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1 vote
1 answer
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BLDC Motor ESC/Controller Analog Receiver PWM/Wiring - Won't detect with potentiometer

I have an RC/drone ESC that takes a PWM input signal at 3.3 V/5 V for throttle control, but has no onboard buck/BEC. I have the illustration below for my current setup. This motor works excellent with ...
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1 answer
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Trying to power 6 brushless motors from a power supply/wall

I'm trying to power 6 of these motors using this ESC. We don't want to buy/use LiPos for the project, it will be tethered to the wall/power supply. However, I don't know how we would go about doing ...
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2 votes
2 answers
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Is it normal for the L298HN to produce a high Vpp when using with PWM?

I'm using an L298HN DC motor driver (ancient part, I know) as a learning exercise, but I'm not sure whether the output is as it should be. My L298HN schematic: Edit: There is an error in my schematic,...
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2 votes
2 answers
68 views

How to control a brushed DC (ish) motor. Is because it's just 110V AC passed thru a full wave bridge rectifier

I have a hoist in my home shop with a 12.5A 1500W 110V brushed DC motor. The kind of DC I described in the title. I see two rectifiers in the system. I want to control the speed (slow it way down) ...
0 votes
1 answer
29 views

Drive a 3phase motor using its position given by AD2S1210

I have drive a 3phase motor using Hall sensor, now with a new 3 phase motor and AD2S1210 IC, I can get motor position. How i can drive the motor by position similar to Hall sensor?
1 vote
1 answer
49 views

How to get the back EMF graph of my BLDC motor in an oscilloscope?

I have a BLDC motor and its controller. How can I see its back EMF graph using an oscilloscope provided I can see the phase-to-phase voltage graph?
1 vote
0 answers
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Need help with circuit for buffering DAC output for low voltage/ moderate current application near 25 Hz, without crosstalk

I have some custom linear force probes I need to be able to control for a lab experiment. They're essentially just a big coil combined with a spring that deflects up or down based on the voltage put ...
8 votes
2 answers
751 views

How bad is it to use 1N4007 as a bootstrap?

I have a moderately high power inverter board I've made. Standard 3 phase H-bridge with bootstrapped high side gate drivers. I've built a few, all have worked fine. They've all been pushing many ...
-1 votes
1 answer
136 views

Selecting IC For Heater Power Control Circuit [closed]

I want to manually control a heater (DC Load) through a "power circuit" enabling one of MCU or FPGA IO. For my power circuit my intention to use an IC (switching regulator maybe) as safety ...
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How to decrease the time required by a PMSM (outer rotor) motor to reach rated speed?

I have a Outer rotor PMSM with FOC control and rated speed of 3000 rpm. It takes about t=0.5 seconds to reach 3000 rpm without load. Goal: Decrease the Time "t", so that the motor can reach ...
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31 views

How to limit Vd and Vq in FOC for 3kW , 48VAC induction motor?

I am working on developing motor controller for AC Induction Motor.Following are the specifications of the motor: Rated voltage:48VAC Rated power : 3kW Rated current :54A Poles : 4 Position feedback : ...
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1 vote
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135 views

What happens if you try to run code faster than your Arduino can handle?

I've been trying to program my Arduino to spin a BLDC motor. When I have this code running the BLDC motor runs perfectly every time. It also makes the motor rotate pretty fast: ...
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7 votes
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159 views

Burned motor controllers: possible root causes analysis

On a submarine robot we built, during an operation, we recently had 3 defect thruster motors (the internal power PCBs have many burnt components, 2 of the motors cracked open due to internal pressure)....
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Calculating required capacitance for ESC?

I'm working on an ESC design, but I'm not sure what capacitance is needed on the output terminals to smoothen out the voltage sags. Any ideas on how to calculate this?
0 votes
3 answers
136 views

Why do you need the bottom flyback diodes in a BLDC motor circuit?

In a BLDC motor drive circuit: What is the point of the bottom three flyback diodes on each of these MOSFETs? This is how I imagine the current is flowing when the MOSFETs are on: Once the inductors ...
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2 votes
1 answer
125 views

Two AC inputs - one DC motor

First of all, I'm a total novice. My parents have an old electric curtain pulley system from probably the 70's. It's run by a universal motor connected to a 3-position switch. The switch positions are ...
0 votes
2 answers
102 views

Induction motor control panel circuit

Updated Again: I have been working on this project for a few weeks now, with an end goal of having a control panel to power our two 120 V induction motors and 6 lights on the control panel using two ...
0 votes
1 answer
33 views

What is the start current for an AC induction motor with a nominal voltage and current of 72V- 65A?

I have an induction motor with the specification of 72V rated voltage and 65A of rated curent. I have power supply with 72V and 100 A of current. Can I use it to move the motor? The peak curent of ...
0 votes
1 answer
83 views

3-phase BLDC motor control

We have a 3-phase BLDC motor with 3 Hall effect sensors. I believe the motor is star connected but the datasheet has little information and we are still trying to obtain this information from the ...
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0 answers
54 views

Heat sink designing for an automotive grade motor controller

I am working on an electric vehicle development project. I am using a motor controller to drive a 3 phase induction motor. The motor controllers' input supply is 48 volts, and they sink a maximum of ...
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0 answers
28 views

Can I use the BLDC QS-909 controller with Hall effect sensor option to drive a sensorless BLDC motor?

It uses: JY21L as controller IC IR2101 MOSFET drivers NCE6690 http://grauonline.de/wordpress/?page_id=3122
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32 views

H-Bridge Decay Mode - BDC

I'm totally new to motor drivers and I'm planning to use a DRV8432 integrated motor driver. I'm confused about the implementation. How do I control which MOSFET to turn on (for slow/fast decay, ...
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1 vote
0 answers
62 views

Three phase brushless DC motor driver using Three current sensor

I wrote a program for a brushless DC motor using three Hall effect sensors. Now I want to rewrite the same program for another brushless motor without Hall sensors. Using three current sensor, I want ...
0 votes
2 answers
73 views

How to properly control a 220 V, 500 W DC motor

I need to turn ON/OFF a 220 VDC, 500W motor as well as changing its speed and reversing direction using a PLC and 3 relays as shown in attached drawing. I am planning to supply 160 VDC for high speed ...
2 votes
3 answers
75 views

12 VDC to 460 VAC 3-phase [closed]

I'm looking to power a 460/220 VAC 13 A/6 A 3-phase motor with 12 V batteries. It's hard to find converters that do this. I have just begun my research but I'm leaning more towards building the ...
8 votes
6 answers
1k views

How to find the root cause of this relay failure

The following is the schematic for the relay section of the board: VBAT: 45-56 V. RY_REAR_MOT: Power to the front motor controller RY_REAR_MOT_EN: 3.3 V enable signal from the MCU. On power up, this ...
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1 vote
0 answers
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Tuning motor temperature

I have a DC motor, running in two modes, slow and fast. I will need to run the motor in FAST mode only. The motor is already running for 10 years. The motor experiences variable load. According to the ...
1 vote
0 answers
99 views

Servo motor initial position hack

I'm working with MG966R servo motors and would like to physically change its initial position. I would like that as soon as it's turned on and the Arduino puts the servo in its initial position (0 ...
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1 vote
1 answer
108 views

Will a flyback diode damage my battery due to back EMF?

I am following this example of a sensored BLDC motor. This post assumes conventional current flow. I am trying to understand how the diodes in this circuit protects the rest of my circuit from back ...
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0 votes
2 answers
144 views

Why does the signal and power supply in my custom ESC breadboard become so noisy when the motor is rotating?

I am building a custom ESC to drive my BLDC motor. The motor spins in open loop and I want to debug the back-EMF detection circuit, but as soon as the motor spins, the signal line of the MCU (MCU uses ...
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0 votes
0 answers
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Help understanding conflicting results from INA190 current sense amp

Built a board for a drone that has a few things onboard, though the one that is messing me up is the current sense chip, INA190, though it's most likely not the problem. Picture 1 show the big yellow ...
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1 vote
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BLDC motor - FOC Iq sign reversal

I operate BLDC motor with FOC controller, and attempt to characterize Iq as a function of load/torque. From FOC theory, I would expect a linear relationship between the torque and the Iq current ...
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0 votes
1 answer
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How to control position and speed of a motor in Simulink?

I am trying to make a system that can launch a ball kind of like how a catapult would do. I'm going to be using an Arduino and an H-bridge with PWM but I'm not sure how I can control both speed and ...
1 vote
2 answers
216 views

Help me select an option to generate 25 kHz PWM

I'm running Arduino Mega with Marlin Firmware (as my 3d printer controller) which to my understanding has its PWM set to 1 kHz. I want to control a 4-wire fan (Pfc0612de) with PWM from 30% to 100% and ...
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-1 votes
1 answer
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Motor Controller Cloning Service? [closed]

I am a total amateur and seek the hardware engineer wizards that frequent this website, lol. Anyway, does there exist a service to clone a PCB given just a few pictures? Does a service exist that will ...
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0 answers
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Slew Drive Motor Control

I need to control this motor but i don't understand how to control it. Do I need a controller or just supply 24 V? edit: I want to turn on-off and move forward-backward.
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