The motor of IQ is DC motor. According to DC torque/velocity curve, with less velocity we will have more torque. But we test with IQ motor, this is not right. We get the same torque when we programe with lower velocity (we compare between 30% and 100% velocity). Why is that?
This is because more speed=less torque when you use gear ratios. The initial ratio inside the motor remains except they slow down the speed without changing gears.
@jpearman Are there any torque-speed graphs for the IQ motor? Would be a good visual here as well as for the students I know in IQ.
The increased torque is only when it’s slowed down from having a load on it, not when you just tell it to go slower. Also, keep in mind the motors are power limited to prevent damage, so they will stop increasing torque when they are slowed down past a certain point.
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This ^^
However, bit more complicated as you are not directly controlling the motor but rather asking the motor firmware to try and achieve the commanded velocity. So even when when sending 30%, the firmware will adjust voltage to the motor based on the load.
We obviously have the specification of the motor can, but I don’t believe anything has ever been published.
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Any chance that could be published? I think it would be pretty good to have from an education standpoint.
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