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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 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
59 views

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

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
21 views

Hi motor driver help [closed]

I am trying to build a product with a motor and a raspberry pi I am having great difficulty understanding what tells me if the driver board is compatible with a specific motor For example I have been ...
0
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1answer
32 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
51 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 ...
0
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3answers
90 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 ...
1
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0answers
61 views

PWM pull up or down?

I made a little driver circuit for this pump over the last week using the DRV103 driver IC (This IC produces an initial long pulse, followed by adjustable PWM, it's quite cool). I was unsure of ...
0
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1answer
62 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
48 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
70 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 ...
1
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2answers
177 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
20 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
66 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
41 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 ...
3
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3answers
608 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 ...
0
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1answer
47 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
38 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 ...
0
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1answer
44 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 ...
0
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1answer
32 views

Self Inductance in Steady State equivalent model of Brushed DC machine

The First pic shows the model of DC motor under dynamic conditions. The above second image shows the steady-state model of the DC motor. The image below shows the Simplified DC Motor by using a ...
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1answer
47 views

Can't satisfy DJI E300 ESC with my PWM signal [closed]

I'm trying to build a drone with my Raspberry Pi 3. I'm using Windows 10 IoT and C#. I've bought a DJI E300 pack (motor + ESC + Propeller) and in the data sheet it says that the ESC works with ...
0
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1answer
39 views

ESC Output Current for a Brushless Motor with a Given Max Current Rating

I am trying to power a brushless motor with a max current consumption of 12.5 A (specified in datasheet). How should I figure out the maximum current drawn by one of the phases of the ESC? Should I ...
0
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3answers
180 views

Can AC synchronous motors be controlled with VESC?

I want to drive something like these ac synchronous motors: Small Mige: https://www.alibaba.com/product-detail/Small-Mige-130-series-1KW-best_60394196285.html?spm=a2700.7724838.2017115.13....
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0answers
35 views

Driving a PWM controller with an SMPS - Does my motor like it?

SMPS Power supply: MP 3800 I have a 12V brushed DC motor hooked up to a PWM controller. When I run the motor (all works as it should) however there is a lot of crackling noise coming from the PSU. ...
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0answers
28 views

Controller and compensator

What is the difference between controllers and compensators While searching for answer the most prominent answer I got was that compensator have magnitude=1 and is used to make sure the system ...
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1answer
36 views

Shaded pole speed control with PWM

I have a fan with a shaded pole motor and I installed this PWM for speed control. At the moment everything is working well, speed adjustment is sensitive and the fan is barely moving at about the 60% ...
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1answer
108 views

4 Phase 5 Pin high speed motor driving (turbomolecular pump driver)

I just recently purchased a broken Turbomolecular pump from eBay and repaired it, now that it works again I need to build a low-cost driver for it. It has 4 Phases and normally relies on hall ...
-1
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1answer
43 views

Motor for large speed range

I am designing a chuck for which I need a motor which can go from 200rpm to 5000rpm. I tried a 1000KV BLDC with 12V supply, but the minimum rpm was around 1800. Also, I am not sure whether stepper ...
2
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2answers
88 views

DC Series motor and its starting

I studied electromagnetics and with that understanding when I recall the Working of DC Series motor I stumbled upon an inherent negative feedback action in the DC series motor during starting as ...
0
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1answer
41 views

Field Flux control and Speed Of DC motor

I was studying electromagnetism and I tried to link with working of DC motors. For the speed control of DC motor - The Flux of DC motor is reduced to increase the speed above rated speed. I ...
1
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1answer
79 views

FOC electrical angle offset calculation with absolute encoder

I'm currently developing a motor controller with FOC (Field Oriented Control) and I have some trouble with the offset calibration of a motor. What I actually do to calculate the offset: I inject a ...
1
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1answer
34 views

Triac circuit resistor tied to motor

I've run across a triac circuit which has a huge 510 ohm 50W load resistor tied to a 115V 1.6A PSC fan motor. I'm not quite sure what that big resistor is for. Ideas? simulate this circuit – ...
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1answer
49 views

Suggestions on wiring PCA9685 i2c + TB67H303 motor ic

I'm trying to design a circuit in order to use the TB67H303 motor driver with the ATMEGA328p and the i2c protocol by using the PCA9685 controller. I never used the TB67H303 and the PCA9685 chips ...
1
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3answers
69 views

3hp motor contactor size 22A or 40A?

So my place has 2 contactor sizes of 22A and 40A. Now i know that both will be more than enough to power up a 3HP motor. To avoid oversizing in this case, would i need to provide additional fusing to ...
0
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2answers
83 views

Can I Move a wheelchair with two outrunner motors? [closed]

I am trying to turn a wheelchair electric and want to use a VESC to do so. However, I was wondering if an outrunner brushless motor with a belt to a larger gear would be effective and could move the ...
1
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1answer
42 views

Do H-bridge configurations have any advantages over single MOSFET dc motor speed controller designs?

I’m designing a simple dc motor speed controller that only needs to be driven in one direction and I’m wondering if an H-bridge configuration would have any advantages over a single or dual MOSFET ...
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2answers
33 views

TB6612FNG DC Motor Driver Low Current Problem

I have a TB6612FNG pololu DC motor Driver (datasheet), and pololu 488:1 6V DC motor (motorPage). It is clearly stated that motor has 2.9A stall current at 6V and driver has 1.2 continuous current and ...
0
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2answers
140 views

Trapezoidal vs sinusoidal BLDC motor, back EMF speed caclulation

First of all do these motors differ electrically and if yes, how? Can you measure BLDC generator speed using back-emf independent of its waveform type?
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0answers
26 views

Why Dspic304011 Controller's PWM stucks to 50% duty cycle when DC link Voltage is turned onn before the gate votlage turned onn in SPWM inverter.?

I have implemented SPWM inverter that take input from grid (230V AC) and convert this to DC link voltage 320V and this DC link voltage is converter to desire frequency. The gate driver IR2136 is used ...
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0answers
32 views

How to Implement this BEMF Observer

I'm using the lecture by Dave Wilson at TI to implement a BEMF observer. I have the motor winding currents for phase A, B and C. I also have the Bus Voltage I also am in the stationary reference ...
0
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2answers
87 views

Big capacitor near input power connector

I observed that every brushless motor controller has a big capacitor in the design. (1000uF to 3300uF). How is this value choosen and what happens if I eliminate the capacitor in my design ?
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1answer
68 views

SPI with differential line drivers, and star configuration problem

Folks I am helping to design a circuit for a group that uses the odrive motor driver board. The odrive drives two brushless motors and the MCU uses SPI to connect to motor encoders. People using the ...
0
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1answer
40 views

BLDC ESC Reverse Direction with MOSFETS

I have a basic hobby ESC connected to a motor, and the ESC inherently is unidirectional (without firmware changes, which I am trying to avoid). Is it possible to wire up 4 MOSFETS to two of the phases ...
2
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2answers
66 views

Controlling speed of PSC induction motor (Questions about operating at high slip)

Induction motors typically run synchronous speed since most motor types (CS/CSCR/Permanent Split Phase) have high low-end torques. A PSC motor on the other hand doesn't have much low-end torque. FAN ...
0
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1answer
60 views

AC servo ASDA-B2 modbus position control

I have a very specific question on ASDA-B2 servo driver and I hope there is someone who has hands on experience with it who can help me out. I have referred to this user manual and it is not very ...
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0answers
51 views

Simple braking chopper using Zener/TVS diode

So I'm designing a motor controller, relatively low power (100-150W, 12-48V supply), and I'm thinking about adding a braking chopper. Not strictly needed in this design, but it would be a nice value-...
0
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4answers
52 views

Phase control universal motor dimmer

I need to control the speed of a 220v universal motor using arduino and I am thinking to use an atteny85 ic with a phase control circuit (ltv814 to detect zero crosses and moc3052 to drive a triac to ...
2
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2answers
52 views

Is there an economical 2-3 RPM 120v motor with speed control? Or what components could I use to achieve that scenario? [closed]

I've got a mechanical design for a piece of catering equipment and I need to figure out a way to achieve some variable speed control for a slow RPM motor. This is a direct drive application (imagine ...
0
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2answers
62 views

Can I use a 555 PWM signal to control

I want to use a 555 PWM signal to control a motor. I also want represented the speed of the motor with an LED graph using a LM3914 led driver. Can I use a digital signal to control the LM3914 ...
1
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3answers
143 views

How to make a conveyor (electric part)

I am going to make a conveyor like this There will be a optic sensor which detects a box. There will be motor (3 phase, 380 V, 1 A, 0.37 kW, 1400 rpm) with gear reduction (coefficient of reduction ...
0
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0answers
151 views

Unstable speed with A4964 BLDC controller

I am using an Allegro A4964 for controlling a BLDC micromotor. I have tuned the PID and all available parameters according to the documents available from Allegro. Problem: In the control modes I ...