Hi, we know that the speed varies inversely with the torque. The more the torque, the lower the speed. From torque-speed curve, we can calculate the slope. When the applied voltage increases, the straight line shifts upward while when the voltage decreases, the straight line shifts down. How about the torque vs. current line? We know that current varies proportionally with the torque. The more the torque, the more the current. Am I right that when the voltage increases, this line also shifts upward? The torque constant Kt is Torque/Current. Is this Kt the same regardless of the supply voltage?