98 Results for "bldc"

Driving HDD BLDC motor
Log from Hard Disk Drive analog and digital clock
A Hard disk drive motor has more coils than this simple triphased motor. Practically I have found 24 stable positions. The basis sequence of 6 positions is thus repeated 4 times. And 24 is a very convenient number for a clock !As we have 24 stable...

BLDC controller bughunting
Log from linear actuations for everyone!
Time to time work with electronics is deeply confusing.You may have 3 identical FET drivers connected same way, but still - only specific one burns out. Again and again. I've changed resistance (Rgate), and it seems that situation with heating improved...

BLDC rotator plan
Log from P2 - Pick and Place for 3D Printers
I'm going to use an STM32 as my microprocessor, and have that driving an L6234 as my 3 phase motor driver.I'm going to build it on velo-board first, but I'll be using the same SMT components I would for the finished product.I can do current control,...

Upgrading to a BLDC motor
Log from Rockwell Milling Machine Rebuild
I recently decided to upgrade the motor on my Rockwell mill. The existing motor is a 3/4hp induction motor and it's OK... but has a bent shaft and mismatched step pulley. I'm upgrading the motor to use a 4kW brushless hobby motor, which is...

BLDC motor and controller theory
Log from Gator Quad
What is a motor controller? Why do we need it? What circuit topologies are commonly used? These are all good questions and I will try to provide a little bit of background from my limited knowledge on the subject.DC Motors:Let us start with the Motor....

Feelings of a BLDC Speed & Position Control
Log from STM32 Blue pill IoT expansion boards
Experimentation setupThe PS4 Joystick is a good way to manipulate multiple variables simultaneously which is suitable for experimentation. The touch pad adds possibilities for position reference.The Raspberry pi here is not needed for the BLDC control...

Controlling a brushless motor (BLDC): Software
Log from FlexSEA: Wearable robotics toolkit
As a starting point, I highly recommend reading AN857 Brushless DC Motor Control Made Easy & AN885 Brushless DC (BLDC) Motor Fundamentals from Microchip. The So, Which PWM Technique is Best? series from TI will then complement your knowledge of BLDC...

Centripetal Force and the BLDC Gyrofan
Log from TrillSat
I started to look more closely at the centripetal force equation, since I've been wary of raising the Gyrofan speed higher with its full mass, as I didn't know exactly how much force was being generated. I'd like to ramp the thing up to get appreciable...

BLDC/Gyrofan Is Back in Action
Log from TrillSat
I fully charged the two Lithium-ion battery banks (around 8.4 volts in series), but the BLDC problem that I mentioned in my previous log entry still occurred, so I wrote up a small amount of Python and C code to create a new XMPP command called "bldctest...

Controlling a brushless motor (BLDC): Hardware
Log from FlexSEA: Wearable robotics toolkit
The BLDC schematic consists of 3 copies of the Half-bridge sheet (motor commutation), the Shorted-Leads protection circuit, phase voltage sensing and bridge temperature sensing.U7 (temperature sensor) is routed close to the power MOSFETs. Figure 13 shows...

Plan for an improved BLDC controller
Log from prism laser scanner
Rotating polygon laser scanners need to keep track of the angular position of theprism or mirror.In an earlier version of Hexastorm, this was achieved with a Sharp A160 polygonmotor. This board has a NIBC3111 chip. Motor speed could becontrolled by sending...

Second BLDC is Installed (and giving me trouble, of course)
Log from TrillSat
The replacement BLDC has been soldered in place on Circuit Board C, and the new ZIF ribbon cable connector seems to work pretty well. However, since I'm trying not to wire on top of the BLDC this time, I've just about run out of room for the circuit...

New Thruster layout, BLDC driver rabbit hole and Embedded Linux
Log from Aruna - ROV
New thruster layout design The current thruster design of the ROV is quite agile with the 6 motors the submersible is able to move in 5 dimensions. With the front (1 and 2) en back (3 and 4) motors being able to use to go in 3 dimensions (X axis, Y...

Log #9 BLDC Hybrid drive with "2-speed Shifter"
Log from Hoverboards for Assistive Devices
While I was experimenting with controlling the speed of the H/B drive wheels, I realized that really slow speed control was difficult to achieve with reasonable torque. This is unfortunate, because I'm anticipating needing slow (safe) speeds, but...

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