Brushless DC-Servomotors Series 1218 ... B

2 Pole Technology

Key Features

Nominal voltage:

6 ... 12 V

Rated torque up to:

0.96 mNm

No-load speed up to:

31500 min⁻¹

Stall torque up to:

3.44 mNm

Diameter:

12 mm

Length:

18 mm

Advantages

High density ironless system FAULHABER winding

Digital or analog hall sensors available

Extremely smooth speed control

Sensitive positioning control

Variants:

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	6 V
Terminal resistance, phase-phase	R	3.14 Ω
Efficiency, max.	η_max.	62 %
No-load speed	n₀	30500 min⁻¹
No-load current	I₀	0.089 A
Stall torque	M_H	3.39 mNm
Friction torque, static	C₀	0.066 mNm
Friction torque, dynamic	C_V	3.06 ·10⁻⁶ mNm/min⁻¹
Speed constant	k_n	5276 min⁻¹/V
Back-EMF constant	k_E	0.19 mV/min⁻¹
Torque constant	k_M	1.81 mNm/A
Current constant	k_I	0.553 A/mNm
Slope of n-M curve	Δn/ΔM	9153 min⁻¹/mNm
Terminal inductance, phase-phase	L	35 µH
Mechanical time constant	τ_m	7.7 ms
Rotor inertia	J	0.08 gcm²
Angular acceleration	α_max.	424 ·10³rad/s²
Thermal resistance	R_th1/R_th2	10.6 / 48.3 K/W
Thermal time constant	τ_w1/τ_w2	2.8 / 169 s
Operating temperature range		-20 ... 100 °C
Winding temperature, max.		125 °C
Housing material		aluminium, black anodized
Mass		8.3 g
Direction of rotation		electronically reversible
Speed up to	n_max.	79000 min⁻¹
Number of pole pairs		1
Hall sensors		digital
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	12 V
Terminal resistance, phase-phase	R	12 Ω
Efficiency, max.	η_max.	62 %
No-load speed	n₀	31500 min⁻¹
No-load current	I₀	0.047 A
Stall torque	M_H	3.44 mNm
Friction torque, static	C₀	0.066 mNm
Friction torque, dynamic	C_V	3.06 ·10⁻⁶ mNm/min⁻¹
Speed constant	k_n	2721 min⁻¹/V
Back-EMF constant	k_E	0.368 mV/min⁻¹
Torque constant	k_M	3.51 mNm/A
Current constant	k_I	0.285 A/mNm
Slope of n-M curve	Δn/ΔM	9301 min⁻¹/mNm
Terminal inductance, phase-phase	L	132 µH
Mechanical time constant	τ_m	7.8 ms
Rotor inertia	J	0.08 gcm²
Angular acceleration	α_max.	431 ·10³rad/s²
Thermal resistance	R_th1/R_th2	10.6 / 48.3 K/W
Thermal time constant	τ_w1/τ_w2	2.8 / 169 s
Operating temperature range		-20 ... 100 °C
Winding temperature, max.		125 °C
Housing material		aluminium, black anodized
Mass		8.3 g
Direction of rotation		electronically reversible
Speed up to	n_max.	79000 min⁻¹
Number of pole pairs		1
Hall sensors		digital
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	6 V
Terminal resistance, phase-phase	R	3.14 Ω
Efficiency, max.	η_max.	62 %
No-load speed	n₀	30500 min⁻¹
No-load current	I₀	0.089 A
Stall torque	M_H	3.39 mNm
Friction torque, static	C₀	0.066 mNm
Friction torque, dynamic	C_V	3.06 ·10⁻⁶ mNm/min⁻¹
Speed constant	k_n	5276 min⁻¹/V
Back-EMF constant	k_E	0.19 mV/min⁻¹
Torque constant	k_M	1.81 mNm/A
Current constant	k_I	0.553 A/mNm
Slope of n-M curve	Δn/ΔM	9153 min⁻¹/mNm
Terminal inductance, phase-phase	L	35 µH
Mechanical time constant	τ_m	7.7 ms
Rotor inertia	J	0.08 gcm²
Angular acceleration	α_max.	424 ·10³rad/s²
Thermal resistance	R_th1/R_th2	10.6 / 48.3 K/W
Thermal time constant	τ_w1/τ_w2	2.8 / 169 s
Operating temperature range		-20 ... 100 °C
Winding temperature, max.		125 °C
Housing material		aluminium, black anodized
Mass		8.3 g
Direction of rotation		electronically reversible
Speed up to	n_max.	79000 min⁻¹
Number of pole pairs		1
Hall sensors		digital
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	12 V
Terminal resistance, phase-phase	R	12 Ω
Efficiency, max.	η_max.	62 %
No-load speed	n₀	31500 min⁻¹
No-load current	I₀	0.047 A
Stall torque	M_H	3.44 mNm
Friction torque, static	C₀	0.066 mNm
Friction torque, dynamic	C_V	3.06 ·10⁻⁶ mNm/min⁻¹
Speed constant	k_n	2721 min⁻¹/V
Back-EMF constant	k_E	0.368 mV/min⁻¹
Torque constant	k_M	3.51 mNm/A
Current constant	k_I	0.285 A/mNm
Slope of n-M curve	Δn/ΔM	9301 min⁻¹/mNm
Terminal inductance, phase-phase	L	132 µH
Mechanical time constant	τ_m	7.8 ms
Rotor inertia	J	0.08 gcm²
Angular acceleration	α_max.	431 ·10³rad/s²
Thermal resistance	R_th1/R_th2	10.6 / 48.3 K/W
Thermal time constant	τ_w1/τ_w2	2.8 / 169 s
Operating temperature range		-20 ... 100 °C
Winding temperature, max.		125 °C
Housing material		aluminium, black anodized
Mass		8.3 g
Direction of rotation		electronically reversible
Speed up to	n_max.	79000 min⁻¹
Number of pole pairs		1
Hall sensors		digital
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	6 V
Terminal resistance, phase-phase	R	3.14 Ω
Efficiency, max.	η_max.	62 %
No-load speed	n₀	30500 min⁻¹
No-load current	I₀	0.089 A
Stall torque	M_H	3.39 mNm
Friction torque, static	C₀	0.066 mNm
Friction torque, dynamic	C_V	3.06 ·10⁻⁶ mNm/min⁻¹
Speed constant	k_n	5276 min⁻¹/V
Back-EMF constant	k_E	0.19 mV/min⁻¹
Torque constant	k_M	1.81 mNm/A
Current constant	k_I	0.553 A/mNm
Slope of n-M curve	Δn/ΔM	9153 min⁻¹/mNm
Terminal inductance, phase-phase	L	35 µH
Mechanical time constant	τ_m	7.7 ms
Rotor inertia	J	0.08 gcm²
Angular acceleration	α_max.	424 ·10³rad/s²
Thermal resistance	R_th1/R_th2	10.6 / 48.3 K/W
Thermal time constant	τ_w1/τ_w2	2.8 / 169 s
Operating temperature range		-20 ... 100 °C
Winding temperature, max.		125 °C
Housing material		aluminium, black anodized
Mass		8.3 g
Direction of rotation		electronically reversible
Speed up to	n_max.	79000 min⁻¹
Number of pole pairs		1
Hall sensors		digital
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	12 V
Terminal resistance, phase-phase	R	12 Ω
Efficiency, max.	η_max.	62 %
No-load speed	n₀	31500 min⁻¹
No-load current	I₀	0.047 A
Stall torque	M_H	3.44 mNm
Friction torque, static	C₀	0.066 mNm
Friction torque, dynamic	C_V	3.06 ·10⁻⁶ mNm/min⁻¹
Speed constant	k_n	2721 min⁻¹/V
Back-EMF constant	k_E	0.368 mV/min⁻¹
Torque constant	k_M	3.51 mNm/A
Current constant	k_I	0.285 A/mNm
Slope of n-M curve	Δn/ΔM	9301 min⁻¹/mNm
Terminal inductance, phase-phase	L	132 µH
Mechanical time constant	τ_m	7.8 ms
Rotor inertia	J	0.08 gcm²
Angular acceleration	α_max.	431 ·10³rad/s²
Thermal resistance	R_th1/R_th2	10.6 / 48.3 K/W
Thermal time constant	τ_w1/τ_w2	2.8 / 169 s
Operating temperature range		-20 ... 100 °C
Winding temperature, max.		125 °C
Housing material		aluminium, black anodized
Mass		8.3 g
Direction of rotation		electronically reversible
Speed up to	n_max.	79000 min⁻¹
Number of pole pairs		1
Hall sensors		digital
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	6 V
Terminal resistance, phase-phase	R	3.14 Ω
Efficiency, max.	η_max.	62 %
No-load speed	n₀	30500 min⁻¹
No-load current	I₀	0.089 A
Stall torque	M_H	3.39 mNm
Friction torque, static	C₀	0.066 mNm
Friction torque, dynamic	C_V	3.06 ·10⁻⁶ mNm/min⁻¹
Speed constant	k_n	5276 min⁻¹/V
Back-EMF constant	k_E	0.19 mV/min⁻¹
Torque constant	k_M	1.81 mNm/A
Current constant	k_I	0.553 A/mNm
Slope of n-M curve	Δn/ΔM	9153 min⁻¹/mNm
Terminal inductance, phase-phase	L	35 µH
Mechanical time constant	τ_m	7.7 ms
Rotor inertia	J	0.08 gcm²
Angular acceleration	α_max.	424 ·10³rad/s²
Thermal resistance	R_th1/R_th2	10.6 / 48.3 K/W
Thermal time constant	τ_w1/τ_w2	2.8 / 169 s
Operating temperature range		-20 ... 100 °C
Winding temperature, max.		125 °C
Housing material		aluminium, black anodized
Mass		8.3 g
Direction of rotation		electronically reversible
Speed up to	n_max.	79000 min⁻¹
Number of pole pairs		1
Hall sensors		digital
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	12 V
Terminal resistance, phase-phase	R	12 Ω
Efficiency, max.	η_max.	62 %
No-load speed	n₀	31500 min⁻¹
No-load current	I₀	0.047 A
Stall torque	M_H	3.44 mNm
Friction torque, static	C₀	0.066 mNm
Friction torque, dynamic	C_V	3.06 ·10⁻⁶ mNm/min⁻¹
Speed constant	k_n	2721 min⁻¹/V
Back-EMF constant	k_E	0.368 mV/min⁻¹
Torque constant	k_M	3.51 mNm/A
Current constant	k_I	0.285 A/mNm
Slope of n-M curve	Δn/ΔM	9301 min⁻¹/mNm
Terminal inductance, phase-phase	L	132 µH
Mechanical time constant	τ_m	7.8 ms
Rotor inertia	J	0.08 gcm²
Angular acceleration	α_max.	431 ·10³rad/s²
Thermal resistance	R_th1/R_th2	10.6 / 48.3 K/W
Thermal time constant	τ_w1/τ_w2	2.8 / 169 s
Operating temperature range		-20 ... 100 °C
Winding temperature, max.		125 °C
Housing material		aluminium, black anodized
Mass		8.3 g
Direction of rotation		electronically reversible
Speed up to	n_max.	79000 min⁻¹
Number of pole pairs		1
Hall sensors		digital
Magnet material		NdFeB

Operating Area

Recommended operation areas at nominal voltage 6 V

The diagram indicates the recommended speed in relation to the available torque at the output shaft for a given ambient temperature of 22°C.

The diagram shows the motor in a completely insulated as well as thermally coupled condition (R_th2 50% reduced).

The nominal voltage (U_N) curve shows the operating point at nominal voltage in the insulated and thermally coupled condition. Any points of operation above the curve at nominal voltage will require a higher operating voltage. Any points below the nominal voltage curve will require less voltage.

Characteristic curves of motor