Brushless DC-Flat Motors Series 3216 ... BXT R

External rotor technology, without housing

Key Features

Nominal voltage:

9 ... 24 V

Rated torque up to:

41 mNm

No-load speed up to:

6240 min⁻¹

Diameter:

32 mm

Length:

16 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	9 V
Terminal resistance, phase-phase	R	0.55 Ω
Efficiency, max.	η_max.	82 %
No-load speed	n₀	6020 min⁻¹
No-load current	I₀	0.179 A
Friction torque, static	C₀	0.92 mNm
Friction torque, dynamic	C_V	2.32 ·10⁻⁴ mNm/min⁻¹
Speed constant	k_n	691 min⁻¹/V
Back-EMF constant	k_E	1.45 mV/min⁻¹
Torque constant	k_M	13.8 mNm/A
Current constant	k_I	0.0724 A/mNm
Slope of n-M curve	Δn/ΔM	27.5 min⁻¹/mNm
Terminal inductance, phase-phase	L	191 µH
Mechanical time constant	τ_m	5.28 ms
Rotor inertia	J	18.3 gcm²
Angular acceleration	α_max.	123 ·10³rad/s²
Thermal resistance	R_th1/R_th2	5.5 / 24.5 K/W
Thermal time constant	τ_w1/τ_w2	5 / 310 s
Operating temperature range		-40 ... 100 °C
Winding temperature, max.		125 °C
Mass		57.9 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	0.88 Ω
Efficiency, max.	η_max.	83 %
No-load speed	n₀	6240 min⁻¹
No-load current	I₀	0.129 A
Friction torque, static	C₀	0.92 mNm
Friction torque, dynamic	C_V	2.32 ·10⁻⁴ mNm/min⁻¹
Speed constant	k_n	530 min⁻¹/V
Back-EMF constant	k_E	1.89 mV/min⁻¹
Torque constant	k_M	18 mNm/A
Current constant	k_I	0.0555 A/mNm
Slope of n-M curve	Δn/ΔM	25.9 min⁻¹/mNm
Terminal inductance, phase-phase	L	331 µH
Mechanical time constant	τ_m	4.97 ms
Rotor inertia	J	18.3 gcm²
Angular acceleration	α_max.	134 ·10³rad/s²
Thermal resistance	R_th1/R_th2	5.5 / 24.5 K/W
Thermal time constant	τ_w1/τ_w2	5 / 310 s
Operating temperature range		-40 ... 100 °C
Winding temperature, max.		125 °C
Mass		57.9 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	3.26 Ω
Efficiency, max.	η_max.	82 %
No-load speed	n₀	6200 min⁻¹
No-load current	I₀	0.084 A
Friction torque, static	C₀	0.92 mNm
Friction torque, dynamic	C_V	2.32 ·10⁻⁴ mNm/min⁻¹
Speed constant	k_n	267 min⁻¹/V
Back-EMF constant	k_E	3.75 mV/min⁻¹
Torque constant	k_M	35.8 mNm/A
Current constant	k_I	0.0279 A/mNm
Slope of n-M curve	Δn/ΔM	24.3 min⁻¹/mNm
Terminal inductance, phase-phase	L	1290 µH
Mechanical time constant	τ_m	4.66 ms
Rotor inertia	J	18.3 gcm²
Angular acceleration	α_max.	144 ·10³rad/s²
Thermal resistance	R_th1/R_th2	5.5 / 24.5 K/W
Thermal time constant	τ_w1/τ_w2	5 / 310 s
Operating temperature range		-40 ... 100 °C
Winding temperature, max.		125 °C
Mass		57.9 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	9 V
Terminal resistance, phase-phase	R	0.55 Ω
Efficiency, max.	η_max.	82 %
No-load speed	n₀	6020 min⁻¹
No-load current	I₀	0.179 A
Friction torque, static	C₀	0.92 mNm
Friction torque, dynamic	C_V	2.32 ·10⁻⁴ mNm/min⁻¹
Speed constant	k_n	691 min⁻¹/V
Back-EMF constant	k_E	1.45 mV/min⁻¹
Torque constant	k_M	13.8 mNm/A
Current constant	k_I	0.0724 A/mNm
Slope of n-M curve	Δn/ΔM	27.5 min⁻¹/mNm
Terminal inductance, phase-phase	L	191 µH
Mechanical time constant	τ_m	5.28 ms
Rotor inertia	J	18.3 gcm²
Angular acceleration	α_max.	123 ·10³rad/s²
Thermal resistance	R_th1/R_th2	5.5 / 24.5 K/W
Thermal time constant	τ_w1/τ_w2	5 / 310 s
Operating temperature range		-40 ... 100 °C
Winding temperature, max.		125 °C
Mass		57.9 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	0.88 Ω
Efficiency, max.	η_max.	83 %
No-load speed	n₀	6240 min⁻¹
No-load current	I₀	0.129 A
Friction torque, static	C₀	0.92 mNm
Friction torque, dynamic	C_V	2.32 ·10⁻⁴ mNm/min⁻¹
Speed constant	k_n	530 min⁻¹/V
Back-EMF constant	k_E	1.89 mV/min⁻¹
Torque constant	k_M	18 mNm/A
Current constant	k_I	0.0555 A/mNm
Slope of n-M curve	Δn/ΔM	25.9 min⁻¹/mNm
Terminal inductance, phase-phase	L	331 µH
Mechanical time constant	τ_m	4.97 ms
Rotor inertia	J	18.3 gcm²
Angular acceleration	α_max.	134 ·10³rad/s²
Thermal resistance	R_th1/R_th2	5.5 / 24.5 K/W
Thermal time constant	τ_w1/τ_w2	5 / 310 s
Operating temperature range		-40 ... 100 °C
Winding temperature, max.		125 °C
Mass		57.9 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	3.26 Ω
Efficiency, max.	η_max.	82 %
No-load speed	n₀	6200 min⁻¹
No-load current	I₀	0.084 A
Friction torque, static	C₀	0.92 mNm
Friction torque, dynamic	C_V	2.32 ·10⁻⁴ mNm/min⁻¹
Speed constant	k_n	267 min⁻¹/V
Back-EMF constant	k_E	3.75 mV/min⁻¹
Torque constant	k_M	35.8 mNm/A
Current constant	k_I	0.0279 A/mNm
Slope of n-M curve	Δn/ΔM	24.3 min⁻¹/mNm
Terminal inductance, phase-phase	L	1290 µH
Mechanical time constant	τ_m	4.66 ms
Rotor inertia	J	18.3 gcm²
Angular acceleration	α_max.	144 ·10³rad/s²
Thermal resistance	R_th1/R_th2	5.5 / 24.5 K/W
Thermal time constant	τ_w1/τ_w2	5 / 310 s
Operating temperature range		-40 ... 100 °C
Winding temperature, max.		125 °C
Mass		57.9 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