BLHeli on Hobbyking 40A ESC 4A UBEC 9261000003 – #3

ESC02

Following on from BLHeli on Hobbyking 40A ESC 4A UBEC 9261000003… and BLHeli on Hobbyking 40A ESC 4A UBEC 9261000003 – #2

This article documents some comparison tests of:

  • SimonK commit 1f75da384e5c83f83916aa752819ca6eed712565 bs.hex; and
  • BLHeli v11.2 commit baaa4db600b5cd78752c9b4f580fd08d15f1f1f1 for Hobbyking 40A ESC 4A UBEC.

Continue reading BLHeli on Hobbyking 40A ESC 4A UBEC 9261000003 – #3

BLHeli on Hobbyking 40A ESC 4A UBEC 9261000003 – #2

Following on from BLHeli on Hobbyking 40A ESC 4A UBEC 9261000003

I was sent some further info on the bootloader firmware and adapter hardware.

Initial experiments using an adapter that I use for a range of this type of application were unsuccessful. On examining the waveforms with a ‘scope, it was apparent that a lower value of pull-up resistor was required. Continue reading BLHeli on Hobbyking 40A ESC 4A UBEC 9261000003 – #2

BLHeli on Hobbyking 40A ESC 4A UBEC 9261000003

The recent release 11.2 of BLHeli supports some popular Atmel based ESCs.

ESC01

This article is a review of HK_UBEC_40A_MULTI_REV11_2 on that ESC (http://www.hobbyking.com/hobbyking/s…arehouse_.html) at 4S with a Hobbyking 4822-690Kv 22 pole motor and 1045 SF propeller.  This ESC was chosen as it is an inexpensive ESC that rates well in features (fast N FETs, support for bootloader and fully damped mode) in BLHelis documented compatibility list. Continue reading BLHeli on Hobbyking 40A ESC 4A UBEC 9261000003

SimonK ESC FW – test of commit 1f75da – #2

X450

SimonK commit 1f75da: (20140313) with COMP_PWM was loaded on the F-30A ESCs on this X450 quad with APM FC, 3S, Hobbyking D2836-8 1000kv motors and 11×4.5 SF propellers.

Performed rapid acceleration under WOT, motor idle, recovery, maneuvers and no issues, no hint of sync problems, works fine.

SimonK ESC FW – test of commit 1f75da – #3

F330-01

SimonK commit 1f75da: (20140313) with COMP_PWM was loaded on the F-30A ESCs on this F330 quad with Multiwii 2.3 FC, 3S, Hobbyking D2830-11 motors and 8×4.5 SF propellers.

Performed rapid acceleration under WOT, motor idle, recovery, maneuvers and no issues, no hint of sync problems, works fine.

An inexpensive current limiter for flashing and initial testing of ESCs – Mk II

There is a risk of damage when flashing ESCs. It accrues from the fact that ESCs have a three-legged H bridge and if a high and low FET are turned on simultaneously, damaging currents may flow. In fact, this can be an issue if the FETs are on together for just microseconds on each PWM cycle. Loading the wrong hex module is a recipe for disaster, it may turn on FETs in an unexpected way.

So, for safety, the ESC should be powered from a current limited power supply during flashing and initial motor testing.

In a process of continuing development, this article describes a variation on the inexpensive current limiter for flashing and initial testing of ESCs – Mk I.

Continue reading An inexpensive current limiter for flashing and initial testing of ESCs – Mk II