Posted by: acharnley
Re: Fahrradzukunft 40 erschienen! - 06/11/25 02:22 PM
Also regarding the article the measurements aren't accurate. When Andreas measured the input wattages he used good quality measuring devices but doesn't understand phase. I did tell him but was politely ignored and subsequently both the Igaro C1 and Forumslader measure less wattage in his test. These are the only two with phase compensation and they will both (I say both, it is likely for Forumslader) extract more real power than Ladelux.
It is also almost impossible to calculate actual output at either USB or LED unless it is sampled over time, this is especially the case for the Igaro C1 as it used (at the time of the test) bands for power delivery, however it is also true for all devices which contain internal storage. Sampling over time needs a computer/CPU and the test omits it. Another fault is the article runs tests with internal storage at half capacity but for the Igaro C1 uses 2.5v/5.0v. With super-capacitors 2.5v isn't 50%, that would be about 3.6v according to E = ½ × C × V².
It is certainly possible the Ladelux can generate more light than Igaro C1, for which the LED max output is about 8W (and the dynamo hub can provide more than this at greater speeds), but overall light output over time is less because riders don't always go consistently at 30km/h. Also they may run a rear light and also USB which take away some of the power. Another question, do riders always want maximum output or do they want to store some for the slow sections? This is why an automated variable riding test is needed, not what Andreas performs.
Back to the original statement, the largest extraction gain comes from phase compensation, which Ladelux doesn't have. Both devices have active rectification and MPPT, but large super-capacitors are more efficient then small li-ion batteries. For it's size Ladelux is a good effort, but the four components of the Igaro C1 which make extraction performance and efficiency basically impossible to beat, does exactly that.
* Igaro C1 has two phase compensation levels with partially variable capacitance, the latest Forumslader has more (four?) phase compensation levels with fixed capacitance - it may be able to beat the Igaro C1 at certain speeds where it's compensation reduces the phase angle closer to zero.
Cheers, Andrew @ Igaro
It is also almost impossible to calculate actual output at either USB or LED unless it is sampled over time, this is especially the case for the Igaro C1 as it used (at the time of the test) bands for power delivery, however it is also true for all devices which contain internal storage. Sampling over time needs a computer/CPU and the test omits it. Another fault is the article runs tests with internal storage at half capacity but for the Igaro C1 uses 2.5v/5.0v. With super-capacitors 2.5v isn't 50%, that would be about 3.6v according to E = ½ × C × V².
It is certainly possible the Ladelux can generate more light than Igaro C1, for which the LED max output is about 8W (and the dynamo hub can provide more than this at greater speeds), but overall light output over time is less because riders don't always go consistently at 30km/h. Also they may run a rear light and also USB which take away some of the power. Another question, do riders always want maximum output or do they want to store some for the slow sections? This is why an automated variable riding test is needed, not what Andreas performs.
Back to the original statement, the largest extraction gain comes from phase compensation, which Ladelux doesn't have. Both devices have active rectification and MPPT, but large super-capacitors are more efficient then small li-ion batteries. For it's size Ladelux is a good effort, but the four components of the Igaro C1 which make extraction performance and efficiency basically impossible to beat, does exactly that.
* Igaro C1 has two phase compensation levels with partially variable capacitance, the latest Forumslader has more (four?) phase compensation levels with fixed capacitance - it may be able to beat the Igaro C1 at certain speeds where it's compensation reduces the phase angle closer to zero.
Cheers, Andrew @ Igaro