brushless direct current (DC) motors
2
votes
1answer
117 views
bldc motor torque controller
I have a working custom motor controller for three phase sensorless bldc motors. I've implemented open loop speed control, where the duty cycle is changed to change speed. I've also implemented a ...
5
votes
1answer
168 views
High Side and Low Side MOSFET Driver… with low supply voltage
I need to drive a pair of N channel MOSFETs, one on the high side of the load and one on the low side of a load. Most ICs I can find for this application require 10V+ supply voltage to get the the ...
0
votes
1answer
173 views
24v brushless DC Driver Pinout
I have some Brushless DC Motors with drivers and I need some help finding the pinout of the drivers.
Please take a moment to view the pictures here, clicking on a picture will show its ...
3
votes
2answers
166 views
What do the green and yellow wires in a BLDC fan do?
I rescued a box of brand new 'Nidec UltraFlo V60E12BS1A7-09A032 12VDC 2.45A' fans from being thrown away and of course I haven't got the datasheet for them. The closest matching datasheet is here: ...
6
votes
3answers
197 views
Why Have Non-Zero Timing on a BLDC?
I've heard you can go faster in one direction if you adjust the timing, but do not understand why? I have a sensored bldc motor with a 30deg shift of the hall-effect sensors, tried going forward (CCW ...
3
votes
1answer
279 views
How to Find Time Constant of a BLDC Motor?
I've done this with DC motors by determining the inductance and then computing tao = L/R where L is the inductance of the coil and R is the resistance of the coil.
Is there a best-practice way to ...
0
votes
2answers
173 views
How to choose a PIC for a BLDC Motor Controller?
I just made a BLDC motor controller, but I'd like it to be able to go to higher frequencies (have less dead time, faster firmware, etc). In particular, I'm aiming for 20kHz-to-50kHz range, but am ...
2
votes
1answer
222 views
Why does BLDC Motor Spin Slower with Same Duty Cycle at Higher Frequencies?
I have an OTS BLDC motor controller as well as one that I just made myself and both seem to be dramatically slower at higher frequencies. When I look at how much current is being drawn it makes ...
2
votes
1answer
189 views
BLDC Motor Driver Losses
That was a pdf when originally uploaded, but am now going to try to zoom in on the sub-circuits. Please let me know if there's a better way to do this.
I'm trying to make a PIC-based BLDC motor ...
1
vote
1answer
176 views
BLDC motor how to identify
How to identify whether given motor is permanent magnet AC ie sinusoidal back emf or permanent magnet trapezoidal back emf motor. I am confused as motor I am having seems sinusoidal back emf and ...
0
votes
1answer
85 views
1S Lipo Powered BLDC Motor Control?
I have a 1S Lipo battery, and would like to drive a micro brushless motor at upwards of 6 Amps. I'm trying to design the h-bridges using 2 N channel mosfets each, but ran into the issue of finding a ...
6
votes
3answers
3k views
Control differences between ac induction motor and brushless dc motor?
I have a fairly solid background in industrial AC motor control (soft starters, VFDs, etc.) but something that I'm certainly NOT well versed in is brushless DC motors... the type found in every hard ...
0
votes
0answers
167 views
higher back-EMF voltage like input voltage in Brushless DC Motor?
Currently I am working on simulation model for the non-control Brushless DC motor in MATLAB/Simulink environment. BLDC parameters are from the paper via IEEE online library. For now, I am not able to ...
2
votes
1answer
120 views
Inductance of a HDD BLDC Motor Phase
So I have set up a little experiment which involves a HDD BLDC Motor, a scope and a multimeter. Pretty simple, I know. Is it possible to determine the inductance of a phase by the voltage the phase ...
2
votes
1answer
356 views
Brushless motor controlled via current source math model
I'd like to model a brushless motor's (BLDC) dynamic response using Matlab. I'm controlling the motor by an Elesctonic Speed Controller (ESC). I'd like to derive a transfer function of such a circuit ...
4
votes
2answers
994 views
Controlling small brushless dc motors?
I'm designing an ESC with a small microcontroller running at 3.3V. The BLDC motors I have chosen are extremely small, and run best at 3.7V. I have the power supply for both of these (3.7V is VBATT, ...
3
votes
1answer
275 views
BLDC Regenrative ESC and LiPo
I am currently working on a project where I want to implement a Brushless dc motor (like the Turnigy C2226 - 1800kv) to run in-hub of an RC car. I need this entire project to be as lightweight as ...
2
votes
1answer
288 views
How to identify a BLDC motor from a brushed DC motor?
I got 2 dc motors from a broken cheap RC helicopter. How can I Identify what type of motor it is? It has 3 terminals, but only 2 where used. It takes around 2-3 Amps of current at 3.5 V.
Each trace in ...
0
votes
1answer
200 views
Brushless DC motor sometimes running backwards
I'm working on a motor control system I've inherited. It's custom designed but I have access to all the schematics and source code. The way the code is written the motor controller responds to ...
1
vote
1answer
446 views
how to control brushless dc servo motor?
I have one of this motor and would like to make a controller for it ( just a speed controller with regulator that change speed from zero to maximum. ). I know micro controller and embedded system, but ...
5
votes
1answer
224 views
Need help understanding and interpreting IGBT datasheets
When it comes to motor control, I understand that we have the option of using discrete MOSFETs or IGBTs. Also, there are some products in the market where 6 IGBTs are placed in one single package, ...
