Blacklite

Calling someone "son" like you just did isn't civil. Asking "Do you polish your husband's big swinging balls shiny" is also not civil. Pointing out your hypocrisy isn't an "endless, baseless attack". It's calling out a hypocrite. Can you please post where I have endlessly and baselessly attacked you?

If it was a woman would that make that comment fine? Even though we all know that you meant it as a gay slur, it would still be unbelievably inappropriate no matter what gender it referred to. You can't claim that you want civility and then be shown to have posted things like that. It's not an attack to remind you of your disgusting and uncivil behaviour.

Civility noun formal politeness and courtesy in behaviour or speech. The tone in your earlier post is anything but civil. And the homophobic slur is disgusting.

Not complaining and I have been engaging in conversation. I will post a review of the motor when I receive it and have had time to use it. I’m sure you don’t want me to review it before I have it - though that would seem to fit much more into the dialogue in this thread.

Yes. I was talking about the behaviour of actually monitoring who was looking at a post. Because you can doesn’t mean it’s not weird to do so.

Anyone else find this behaviour stalkerish?

The toll gate is not a good example. I stand corrected though, the part you posted potentially might work. The RFID chip then though would not be functioning as an amplifier. It would be functioning as the analog to digital converter for the analog sensor.

Radio-frequency identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects. An RFID system consists of a tiny radio transponder, a radio receiver and transmitter. When triggered by an electromagnetic interrogation pulse from a nearby RFID reader device, the tag transmits digital data, usually an identifying inventory number, back to the reader. This number can be used to track inventory goods. from https://en.wikipedia.org/wiki/Radio-frequency_identification This is not used for transmitting the output of an analog sensor. If you think it is for that purpose can you please give me the part number of an "RFID" chip that has an analog input for a sensor.

It “looks like to me like” is very different to “clearly marked”. Do you think the earth is flat because it looks like it? Also when you spew out labels like NFC or RFID do you even know what they mean? Neither of those things is an amplifier. Both refer to short range wireless communications techniques. Exactly the opposite of what you would use if you had an inductive coupling.

Can you please show me where the “the two coils are clearly marked”? It may be inductively transferred. It may not be. Your approach though of assuming something, saying there is proof, and then revealing your proof is just because you have made the assumption is one of the more interesting logical fallacies I have ever seen.

I guess it's interesting that you assume it's inductive transfer. Are you looking at it beyond your current perceptions?

It's not if it is a strain gauge that interests me... it's the mechanism of transmission of that information. An inductance transmission that rotates is always going to be subject to movement. And forgive me for not remembering all my physics and engineering classes, but from memory inductive transfer is at least quadratic in terms of distance between coils I think... So small changes in how the coils interact can be magnified greatly with manufacturing tolerances.

I don't particularly want to argue, but I don't think the diagram gives enough information to show that. Maybe it is, maybe it is not.

The extra bearings are an excellent addition. For the torque sensor the diagram doesn’t really show if the sensor is inductively coupled or if part 16 is actually just electrical contacts for connection.

So you have a torque sensor Bafang BBS series? Or just making stuff up?

And having a benchmark that exists and isn’t a figment of someone imagination is also important.

You can’t benchmark against something that doesn’t exist. And then you conflate ”state of the art” to “prior art”. Dig upwards mate.

So what you’ve described as the benchmark product doesn’t exist?

Which Bafang crank drive motor, for DIY install in a standard bottom bracket, has a torque sensor?

My comment was in relation to the TSDZ2 torque sensor. I haven't seen the To7 motor in person yet, only what I have read and seen in pictures in forums, and in conversations with alexfnoble. I'm hoping that it has a torque sensor that is much more consistent in output than the TSDZ2 one that is highly variable in range and linearity across both different units and also with changes in temperature. It's one of the things I really want to test on the new DM-02. That consistency is one of the keys to achieving a responsive and consistent riding experience.

If the voltage is lower, you need more field weakening to maintain a higher speed. The max speed of the motor is limited by voltage. Reduce the field weakening when the voltage lowers will just lower the rotational speed. Ironically even though you made a big point of of saying above what you actually suggested with your code in the other thread is which increases the angle as the voltage drops. You claim you said one thing and then when I look it up find out you said the exact opposite. Anyways. This has taken this thread completely off topic. I’m excited that the new To7 motors have a proper FOC controller. The TSDZ2 firmware, both stock and open source, does not. It doesn’t have the processing power, nor the required phase current sensors to do so.

You continue to say the torque sensor is the coil - “the torque sensor - in this instance - the fixed coil” - when it’s demonstrably true that the torque sensor is the hall sensor. The coil is just a transmission mechanism. I would code field weakening exactly as how it is done one of the OSF’s. When you hit max duty cycle on the PWM drive, but there is still demand for more speed, increase the advance angle on the motor drive, effectively creating field weakening. You can’t increase torque and motor speed at the same time. It’s one or the other. If you mean to limit the max torque at lower cadences so there isn’t a drop off when weakening kicks in and reduces torque the most efficient way would be to have a current limit at lower cadences. Doing it with changing the advance angle at lower cadences would be inefficient in terms of power draw.

The hall sensor has a magnet near it, and it is the movement in the magnet in relation to the hall sensor that senses the torque. The coils are an inductive method of transfer of this information allowing for crank rotation. Your original comment was that You stated the induction coil did the torque sensing in a TSDZ2. It is clearly a hall sensor not a coil. Field weakening is a process to increase the rotational speed of a BLDC motor beyond that of its unloaded maximum RPM given by its motor constant. Torque is reduced but rotational speed increased for the set maximum voltage available. Obviously this can lead to a higher possible cadence at the pedals, but with a reduction in efficiency in the motor. https://au.mathworks.com/solutions/electrification/field-weakening-control.html The supplied torque from the motor in its field weakening region will be less than in its constant torque region, so you’ll have to pedal harder. Beyond that please tell me how pedalling torque relates to field weakening?

Hopefully will have one soon. Not quite sure how that is relevant to my comment though. Seems as though It’s not about grovelling for forgiveness. There were multiple points that you were completely wrong about, and most pointed towards someone with barely any understanding of how modern BLDC motor control works. From a crank sensor being used for motor advance angle, to the TDSZ2 torque sensor being a coil (hint: it’s actually a hall sensor). So it’s worth mentioning to all that your critique is not based on someone with solid engineering knowledge in this field. For things to improve this would be my top four - Heat management between stator and case A proper FOC controller. Less play in the axle / better and smoother bearings. A more consistent torque sensor that doesn’t have wildly variable values between units. Notice how a lot of these are things that To7 have claimed to have addressed. I personally can’t wait to use one and see if they have.

So that’s a DIY install motor? Must be if it’s the competition. Oh hang on… it’s not. Have you actually opened up a TDSZ2? Given you claimed it didn't have a cadence sensor and also your demonstrated complete lack of understanding around BLDC motor control, I wouldn’t be taking your comments too seriously.