Brushless DC-Flat Motors Series 2214 ... BXT R

External rotor technology, without housing

Key Features

Nominal voltage:

6 ... 24 V

Rated torque up to:

10.2 mNm

No-load speed up to:

6960 min⁻¹

Diameter:

22 mm

Length:

14 mm

Advantages

External rotor motors with very high torque

Continuous output up to 100 W

Outstanding ratio of torque to weight and size

Flat design for space-critical applications. Length range of 14 to 21 mm.

Matching optical and magnetic encoders, gearheads and controls available

14-pole construction

Variants:

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	6 V
Terminal resistance, phase-phase	R	2.42 Ω
Efficiency, max.	η_max.	72 %
No-load speed	n₀	5740 min⁻¹
No-load current	I₀	0.062 A
Friction torque, static	C₀	0.25 mNm
Friction torque, dynamic	C_V	6.18 ·10⁻⁵ mNm/min⁻¹
Speed constant	k_n	997 min⁻¹/V
Back-EMF constant	k_E	1 mV/min⁻¹
Torque constant	k_M	9.58 mNm/A
Current constant	k_I	0.104 A/mNm
Slope of n-M curve	Δn/ΔM	252 min⁻¹/mNm
Terminal inductance, phase-phase	L	271 µH
Mechanical time constant	τ_m	8.7 ms
Rotor inertia	J	3.3 gcm²
Angular acceleration	α_max.	71.1 ·10³rad/s²
Thermal resistance	R_th1/R_th2	7 / 49 K/W
Thermal time constant	τ_w1/τ_w2	5 / 185 s
Operating temperature range		-40 ... 100 °C
Winding temperature, max.		125 °C
Mass		25.5 g
Direction of rotation		electronically reversible
Speed up to	n_max.	10000 min⁻¹
Number of pole pairs		7
Hall sensors		digital
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	12 V
Terminal resistance, phase-phase	R	6.95 Ω
Efficiency, max.	η_max.	73 %
No-load speed	n₀	6500 min⁻¹
No-load current	I₀	0.039 A
Friction torque, static	C₀	0.25 mNm
Friction torque, dynamic	C_V	6.18 ·10⁻⁵ mNm/min⁻¹
Speed constant	k_n	561 min⁻¹/V
Back-EMF constant	k_E	1.78 mV/min⁻¹
Torque constant	k_M	17 mNm/A
Current constant	k_I	0.0588 A/mNm
Slope of n-M curve	Δn/ΔM	229 min⁻¹/mNm
Terminal inductance, phase-phase	L	884 µH
Mechanical time constant	τ_m	7.92 ms
Rotor inertia	J	3.3 gcm²
Angular acceleration	α_max.	88.2 ·10³rad/s²
Thermal resistance	R_th1/R_th2	7 / 49 K/W
Thermal time constant	τ_w1/τ_w2	5 / 185 s
Operating temperature range		-40 ... 100 °C
Winding temperature, max.		125 °C
Mass		25.5 g
Direction of rotation		electronically reversible
Speed up to	n_max.	10000 min⁻¹
Number of pole pairs		7
Hall sensors		digital
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	24 V
Terminal resistance, phase-phase	R	25.9 Ω
Efficiency, max.	η_max.	70 %
No-load speed	n₀	6960 min⁻¹
No-load current	I₀	0.016 A
Friction torque, static	C₀	0.25 mNm
Friction torque, dynamic	C_V	6.18 ·10⁻⁵ mNm/min⁻¹
Speed constant	k_n	296 min⁻¹/V
Back-EMF constant	k_E	3.37 mV/min⁻¹
Torque constant	k_M	32.2 mNm/A
Current constant	k_I	0.031 A/mNm
Slope of n-M curve	Δn/ΔM	238 min⁻¹/mNm
Terminal inductance, phase-phase	L	3150 µH
Mechanical time constant	τ_m	8.22 ms
Rotor inertia	J	3.3 gcm²
Angular acceleration	α_max.	89.7 ·10³rad/s²
Thermal resistance	R_th1/R_th2	7 / 49 K/W
Thermal time constant	τ_w1/τ_w2	5 / 185 s
Operating temperature range		-40 ... 100 °C
Winding temperature, max.		125 °C
Mass		25.5 g
Direction of rotation		electronically reversible
Speed up to	n_max.	10000 min⁻¹
Number of pole pairs		7
Hall sensors		digital
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	6 V
Terminal resistance, phase-phase	R	2.42 Ω
Efficiency, max.	η_max.	72 %
No-load speed	n₀	5740 min⁻¹
No-load current	I₀	0.062 A
Friction torque, static	C₀	0.25 mNm
Friction torque, dynamic	C_V	6.18 ·10⁻⁵ mNm/min⁻¹
Speed constant	k_n	997 min⁻¹/V
Back-EMF constant	k_E	1 mV/min⁻¹
Torque constant	k_M	9.58 mNm/A
Current constant	k_I	0.104 A/mNm
Slope of n-M curve	Δn/ΔM	252 min⁻¹/mNm
Terminal inductance, phase-phase	L	271 µH
Mechanical time constant	τ_m	8.7 ms
Rotor inertia	J	3.3 gcm²
Angular acceleration	α_max.	71.1 ·10³rad/s²
Thermal resistance	R_th1/R_th2	7 / 49 K/W
Thermal time constant	τ_w1/τ_w2	5 / 185 s
Operating temperature range		-40 ... 100 °C
Winding temperature, max.		125 °C
Mass		25.5 g
Direction of rotation		electronically reversible
Speed up to	n_max.	10000 min⁻¹
Number of pole pairs		7
Hall sensors		digital
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	12 V
Terminal resistance, phase-phase	R	6.95 Ω
Efficiency, max.	η_max.	73 %
No-load speed	n₀	6500 min⁻¹
No-load current	I₀	0.039 A
Friction torque, static	C₀	0.25 mNm
Friction torque, dynamic	C_V	6.18 ·10⁻⁵ mNm/min⁻¹
Speed constant	k_n	561 min⁻¹/V
Back-EMF constant	k_E	1.78 mV/min⁻¹
Torque constant	k_M	17 mNm/A
Current constant	k_I	0.0588 A/mNm
Slope of n-M curve	Δn/ΔM	229 min⁻¹/mNm
Terminal inductance, phase-phase	L	884 µH
Mechanical time constant	τ_m	7.92 ms
Rotor inertia	J	3.3 gcm²
Angular acceleration	α_max.	88.2 ·10³rad/s²
Thermal resistance	R_th1/R_th2	7 / 49 K/W
Thermal time constant	τ_w1/τ_w2	5 / 185 s
Operating temperature range		-40 ... 100 °C
Winding temperature, max.		125 °C
Mass		25.5 g
Direction of rotation		electronically reversible
Speed up to	n_max.	10000 min⁻¹
Number of pole pairs		7
Hall sensors		digital
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	24 V
Terminal resistance, phase-phase	R	25.9 Ω
Efficiency, max.	η_max.	70 %
No-load speed	n₀	6960 min⁻¹
No-load current	I₀	0.016 A
Friction torque, static	C₀	0.25 mNm
Friction torque, dynamic	C_V	6.18 ·10⁻⁵ mNm/min⁻¹
Speed constant	k_n	296 min⁻¹/V
Back-EMF constant	k_E	3.37 mV/min⁻¹
Torque constant	k_M	32.2 mNm/A
Current constant	k_I	0.031 A/mNm
Slope of n-M curve	Δn/ΔM	238 min⁻¹/mNm
Terminal inductance, phase-phase	L	3150 µH
Mechanical time constant	τ_m	8.22 ms
Rotor inertia	J	3.3 gcm²
Angular acceleration	α_max.	89.7 ·10³rad/s²
Thermal resistance	R_th1/R_th2	7 / 49 K/W
Thermal time constant	τ_w1/τ_w2	5 / 185 s
Operating temperature range		-40 ... 100 °C
Winding temperature, max.		125 °C
Mass		25.5 g
Direction of rotation		electronically reversible
Speed up to	n_max.	10000 min⁻¹
Number of pole pairs		7
Hall sensors		digital
Magnet material		NdFeB

Operating Area

The display shows the range of possible operation points of the drives at a given ambient temperature of 22°C.

The diagram indicates the recommended speed in relation to the available torque at the output shaft.

It includes the assembly on a plastic- as well as on a metal flange (assembly method: IM B 5).

The nominal voltage linear slope describes the maximal achievable operating points at nominal voltage. Any points of operation above this linear slope will require a supply voltage U_mot >U_N.

Characteristic curves of motor

Operating Area

The display shows the range of possible operation points of the drives at a given ambient temperature of 22°C.

The diagram indicates the recommended speed in relation to the available torque at the output shaft.

It includes the assembly on a plastic- as well as on a metal flange (assembly method: IM B 5).

The nominal voltage linear slope describes the maximal achievable operating points at nominal voltage. Any points of operation above this linear slope will require a supply voltage U_mot >U_N.

Characteristic curves of motor

Operating Area

The display shows the range of possible operation points of the drives at a given ambient temperature of 22°C.

The diagram indicates the recommended speed in relation to the available torque at the output shaft.

It includes the assembly on a plastic- as well as on a metal flange (assembly method: IM B 5).

The nominal voltage linear slope describes the maximal achievable operating points at nominal voltage. Any points of operation above this linear slope will require a supply voltage U_mot >U_N.

Characteristic curves of motor