ODrive Motors

Below is general characteristics and performance numbers of the motors sold on the ODrive shop. Note that all performance figures are approximate, and real-world performance will depend on your particular application and cooling solution.

Because brushless motors are current-limited devices, the torque-speed curve looks quite different than what many people are used to when dealing with brushed motors.

Specifically, the motor is able to operate at a constant torque for the vast majority of its speed range, with the specific torque determined by the motor’s torque constant and current rating. However, after a certain speed (“base speed”), the achievable torque linearly falls to zero as the motor reaches its no-load speed (“free speed”). An example of such a graph is below, however the exact response will differ based on the motor parameters.

M8325s 100KV

Specification	Value	Unit	Notes
Speed Constant [1]	100	RPM/V
Torque Constant [2]	0.083	Nm/A
Speed / Torque Gradient	43.53	RPM/Nm
Pole Pairs	20
Phase Resistance	24	mΩ	Phase-neutral
Phase Inductance	9.9	uH	Phase-neutral
Continuous Current	40 60	A A	Free Air Forced Air
Peak Current	80	A	3-second
Thermistor	NTC 10k 3435

D6374 150KV

Specification	Value	Unit	Notes
Speed Constant [1]	150	RPM/V
Torque Constant [2]	0.055	Nm/A
Speed / Torque Gradient	159.54	RPM/Nm
Pole Pairs	7
Phase Resistance	39	mΩ	Phase-neutral
Phase Inductance	24	uH	Phase-neutral
Continuous Current	50 70	A A	Free Air Forced Air
Peak Current	90	A	3-second
Thermistor	NTC 10k 3435

D5065 270KV

Specification	Value	Unit	Notes
Speed Constant [1]	270	RPM/V
Torque Constant [2]	0.031	Nm/A
Speed / Torque Gradient	515.67	RPM/Nm
Pole Pairs	7
Phase Resistance	39	mΩ	Phase-neutral
Phase Inductance	16	uH	Phase-neutral
Continuous Current	45 65	A A	Free Air Forced Air
Peak Current	85	A	3-second
Thermistor	NTC 10k 3435

D5312s 330KV

Specification	Value	Unit	Notes
Speed Constant [1]	330	RPM/V
Torque Constant [2]	0.025	Nm/A
Speed / Torque Gradient	730.82	RPM/Nm
Pole Pairs	7
Phase Resistance	37	mΩ	Phase-neutral
Phase Inductance	23	uH	Phase-neutral
Continuous Current	30 50	A A	Free Air Forced Air
Peak Current	60	A	3-second
Thermistor	NTC 10k 3435

• [1] All voltage units are line-line amplitude

• [2] All current units are phase amplitude