Torque Constant?

[2moto]

Having looked at more spec sheets than I care to, there seems to be distinct lack of mention of the motor's torque constant. Everything seems to be focused on speed, i.e. voltage constant as in RPM/Volt. But without the required torque to accelerate the maximum speed is largely theoretical. Coming from the industrial world of electrical motors, the imporant specs are torque constant, maximum current, maximum power dissipation in ambient condition, and voltage constant.

Why is this? Is it that allows some of the chinese companies to inflate their specs?

 

[Miles]

If you have the velocity constant (Kv), you also have the torque constant (Kt). They are reciprocals.

If you use Nm for torque and radians/sec for rotational velocity, then:
Kt = 1/Kv

To use rpm for rotational velocity:
Kt = 9.54929/Kv

I agree, the important thing to know is the maximum sustainable current or torque...
If it's stated as torque, it's independent of the winding used....