Questions tagged [brushless-dc-motor]

A brushless DC electric motor is a DC motor type that uses an electronic inverter/switching circuit to energize the motor coils in a sequence (based on the detected rotor position) in order to rotate the motor.

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A4963 3 Phase Brushless Sensorless

I have to develop a driver for a 3 phase brushless DC motor @ 24V with max current per phase of 5A. I want to use an Arduino Zero for testing. My idea is to use the Allegro A4963 IC. This is my first ...
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410 views

Protect battery from overvoltage - DC brushless motor overspeeding condition

I'm trying to figure how to protect batteries from overvoltage on my electric skate. Specific condition is : motor would run above max RPM based on system voltage. Motor is 85Kv, battery voltage is ...
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29 views

How to visualize 3 phase currents vector diagram

I want to visualize the 3 phase currents which are 120 degrees apart by vector diagrams and calculate the net current vector and hence the net magnetic flux vector. The application is the PMSM motor ...
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419 views

Relating Hall sensor outputs to absolute rotor position (Which combination corresponds to which angle)

I have a working 6-step BLDC commutation which works based on the Hall effect sensor outputs. I would like to apply the same code to another motor, which doesnt have Hall sensors but an absolute rotor ...
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191 views

Maintaining fixed shaft position of BLDC/PMSM

I intend to control the position and speed of a BLDC motor (still to be selected) using field oriented control (FOC) and an Encoder to determine shaft position and speed. From what I understand from ...
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3answers
766 views

ESC disconnecting battery while BLDC is rotating protection

I was experimenting with LittleBee-S 30A ESC and the BLDC did not want to stop so I disconnected the battery while BLDC was rotating and after that the ESC voltage regulator got destroyed. The battery ...
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380 views

DRV8313 Charge Pump not working

I built up a custom PCB for the DRV8313. I used the schematic from the datasheet (S.15) The Problem is, that VCP is -0.6V under VM and not +7V over VM. The Power supply has 12V and is adjustable. The ...
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736 views

How to control cd-Rom 3 phase Sensored BLDC Motor with arduino

I have one of these cd-rom bldc motors: I would like to control it using a mcu. However, I am not sure how I would wire it up. I found this post doing exactly this, however a 3-Phase BLDC motor ...
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1k views

Brushed or Brushless DC motor for self balancing robot?

I am looking to balance a robot using a flywheel connected to a DC motor (think of it as an inverted flywheel pendulum). Similar to this: https://www.youtube.com/watch?v=0312BNqIBFI What I am unsure ...
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1answer
93 views

Brushless motor back and high current and IC

I'm trying to replace the brain of my neato vacuum which is broken. I've already repair a cleaning MOP but with this one I have a problem with the brushless motor which is throwing some party fun in ...
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51 views

Ground noise while driving bldc motor

Edited I am trying to drive 3 phase bldc motor using my controller. The controller works fine but I noticed that there is a noise in micro controller output pins. The micro controller output behaves ...
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2answers
306 views

Can I use this BLDC controller for RC motor for friction drive eBike?

I want to build an eBike for myself. I've read a lot on the subject of converting Bikes to eBikes and I think the best approach would be to build a so called friction drive, wherein a small RC BLDC ...
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2answers
404 views

BLDC works on constant current, not on constant voltage

I'm trying to controll a 3-phase brushless DC motor (24V, 4000rpm) with the BOOSTXL-DRV8301 shield for Texas Instruments launchpad. The motor receives one of the following singals on each port (A, B ...
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1answer
119 views

DC motor equation

In the references the Brushless DC motor equations are : (1): L dI/dt+R*I =V - Ke * omega (2): T=I d(omega)/dt+b * omega +c * sign(omega) (3): T=Km*I In this equation by incising the voltage speed is ...
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174 views

Two-speed controller for DC Fan

I have a notebook fan running on 5VDC 0.2A (1W) and a USB powerbank as a battery source (5VDC 7200mAh). This is the fan I have: http://www.ebay.com/itm/191872144970?_trksid=p2060353.m1438.l2649&...
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1answer
74 views

Counting slow to fast in a microcontroller.(Ramp)

I want to make an increment(++) to a variable initially slowly then speed up linearly. For example, using a timer interrupt(every 1 sec) in increase the variable x by 1.so at first variable get ...
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1answer
128 views

Compact small electricity generator using induction coil

Traditional brushless motors use wound induction coils surrounded by permanent magnets. Would it be possible to create a less efficient version generator by rearranging the orientation of the coils to ...
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1answer
105 views

Brushless dc motor

I am working on Brush less dc motor driving circuit,in this i use six MOSFET for switching purpose and 3 hall effect sensor for detecting the position of rotor.and this i choose AN 2212 brush less ...
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1answer
45 views

BLDC motors,and it signals

For changing speed of a BLDC motor,Which kind of signals should i send it?and wich parameters define this signal? Wahts a duty cycle for a signal?sorry for bad english