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by devin
03 Nov 2017, 10:20
Forum: General
Topic: "Peak Efficiency" Control Mode?
Replies: 109
Views: 13096

Re: "Peak Efficiency" Control Mode?

Devin, your calculations/simulations of a while back show your "max efficiency" method reducing the throttle value at certain points in the trip. Thus the guy riding "your algorithm" will be at work later than the guy riding "full trhottle". I propose adding a third vi...
by devin
30 Oct 2017, 16:51
Forum: General
Topic: "Peak Efficiency" Control Mode?
Replies: 109
Views: 13096

Re: "Peak Efficiency" Control Mode?

If you keep talking about kinetic energy in electrons, one day I'll calculate that kinetic energy for you. It's going to be less than you expect. For all practical purposes the kinetic energy in the electrons is zero. You should also stop talking about 100% duty at stall. The hobbyking motor I link...
by devin
29 Oct 2017, 13:46
Forum: General
Topic: "Peak Efficiency" Control Mode?
Replies: 109
Views: 13096

Re: "Peak Efficiency" Control Mode?

If you keep talking about kinetic energy in electrons, one day I'll calculate that kinetic energy for you. It's going to be less than you expect. For all practical purposes the kinetic energy in the electrons is zero. You should also stop talking about 100% duty at stall. The hobbyking motor I link...
by devin
21 Oct 2017, 15:56
Forum: General
Topic: "Peak Efficiency" Control Mode?
Replies: 109
Views: 13096

Re: "Peak Efficiency" Control Mode?

@rew Test Question: I'm an electric skateboard vendor, and a previous customer asks me what options they have to achieve greatest possible range and efficiency on their electric skateboard when commuting in start and stop city traffic. The customer's route to work features many stop signs and stop ...
by devin
20 Oct 2017, 16:31
Forum: General
Topic: "Peak Efficiency" Control Mode?
Replies: 109
Views: 13096

Re: "Peak Efficiency" Control Mode?

Step 2: Calculate battery amp hours consumption over 400 meters full throttle acceleration... (to be continued) Final Results: Efficiency Control at 400 meters: 12.28 watt hours Classical Algorithm at 400 meters: 14.24 watt hours The classical algorithm used about %115.96 as much energy to go half ...
by devin
19 Oct 2017, 13:58
Forum: General
Topic: "Peak Efficiency" Control Mode?
Replies: 109
Views: 13096

Re: "Peak Efficiency" Control Mode?

@rew Let's suppose rider A & B have identical boards matching the board we are discussing. If the math simplifies to optimizing battery use over just one acceleration cycle, let's suppose the comparison is conducted on a flat runway with a simulated green light as the starting line and a red li...
by devin
18 Oct 2017, 16:31
Forum: General
Topic: "Peak Efficiency" Control Mode?
Replies: 109
Views: 13096

Re: "Peak Efficiency" Control Mode?

So your algorithm gets to propose a throttle setting to amp conversion depending on more than just the throttle, right? Well if your algorithm limits "max throttle" to < 5A at < 5km/h, then you will lose customers fast. Acceleration on my bike is unacceptably slow with 20A motor current. ...
by devin
14 Oct 2017, 13:05
Forum: General
Topic: "Peak Efficiency" Control Mode?
Replies: 109
Views: 13096

Re: "Peak Efficiency" Control Mode?

At 20A motor amps, the thrust is (very closely) the same independent of the speed. By my calculations I have about 80N of thrust with 20A motor current . @rew 80N=17.94lb=8.1577kg thrust at 5kmh=3.11mph The board is putting out [183.97N=]41.35829lb=18.76kg thrust at 5kmh=3.11mph simply. (183.97/80)...
by devin
14 Oct 2017, 10:42
Forum: General
Topic: "Peak Efficiency" Control Mode?
Replies: 109
Views: 13096

Re: "Peak Efficiency" Control Mode?

% Motor Amps throttle variation: In theory this code is just another throttle option which instead defines % throttle as % motor amps at desired efficiency (while staying under the various limits) instead of % watts at desired efficiency in the other code. M= 100 = Throttle % Setting K= 90 = Desired...
by devin
14 Oct 2017, 09:38
Forum: General
Topic: "Peak Efficiency" Control Mode?
Replies: 109
Views: 13096

Re: "Peak Efficiency" Control Mode?

Throttle Response Update: In theory this update to the code improves the dynamic throttle response produced by the algorithm at times when full throttle would result in the motor amp limit setting or duty cycle limit setting being reached. Where: M= 100 = Throttle % Setting K= 90 = Desired Efficienc...

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