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Brushless DC-Flat Motors Series 4221 ... BXT R

External rotor technology, without housing

Key Features
Nominal voltage:
18 ... 48 V
Rated torque up to:
134 mNm
No-load speed up to:
6070 min⁻¹
Diameter:
42 mm
Length:
21.2 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:
Series 4221G018BXTR
UN : Nominal voltage : 18 V |MN : Rated torque up to : 122 mNm |n0 : No-load speed up to : 5670 min⁻¹ |Ø : Diameter : 42 mm |L : Length : 21.2 mm
Series 4221G024BXTR
UN : Nominal voltage : 24 V |MN : Rated torque up to : 127 mNm |n0 : No-load speed up to : 5960 min⁻¹ |Ø : Diameter : 42 mm |L : Length : 21.2 mm
Series 4221G048BXTR
UN : Nominal voltage : 48 V |MN : Rated torque up to : 134 mNm |n0 : No-load speed up to : 6070 min⁻¹ |Ø : Diameter : 42 mm |L : Length : 21.2 mm

Values at 22° and nominal voltageValue
Nominal voltageUN 18 V
Terminal resistance, phase-phaseR 0.46 Ω
Efficiency, max.ηmax. 88 %
No-load speedn0 5670 min⁻¹
No-load currentI0 0.181 A
Friction torque, staticC0 2 mNm
Friction torque, dynamicCV 5.63 ·10⁻⁴ mNm/min⁻¹
Speed constantkn 320 min⁻¹/V
Back-EMF constantkE 3.13 mV/min⁻¹
Torque constantkM 29.8 mNm/A
Current constantkI 0.0335 A/mNm
Slope of n-M curveΔn/ΔM 4.93 min⁻¹/mNm
Terminal inductance, phase-phaseL 396 µH
Mechanical time constantτm 3.56 ms
Rotor inertiaJ 69 gcm²
Angular accelerationαmax. 169 ·10³rad/s²
Thermal resistanceRth1/Rth2 3 / 14.5 K/W
Thermal time constantτw1/τw2 5 / 630 s
Operating temperature range -40 ... 100 °C
Winding temperature, max. 125 °C
Mass 127 g
Direction of rotation electronically reversible
Speed up tonmax. 10000 min⁻¹
Number of pole pairs 7
Hall sensors digital
Magnet material NdFeB

Values at 22° and nominal voltageValue
Nominal voltageUN 18 V
Terminal resistance, phase-phaseR 0.46 Ω
Efficiency, max.ηmax. 88 %
No-load speedn0 5670 min⁻¹
No-load currentI0 0.181 A
Friction torque, staticC0 2 mNm
Friction torque, dynamicCV 5.63 ·10⁻⁴ mNm/min⁻¹
Speed constantkn 320 min⁻¹/V
Back-EMF constantkE 3.13 mV/min⁻¹
Torque constantkM 29.8 mNm/A
Current constantkI 0.0335 A/mNm
Slope of n-M curveΔn/ΔM 4.93 min⁻¹/mNm
Terminal inductance, phase-phaseL 396 µH
Mechanical time constantτm 3.56 ms
Rotor inertiaJ 69 gcm²
Angular accelerationαmax. 169 ·10³rad/s²
Thermal resistanceRth1/Rth2 3 / 14.5 K/W
Thermal time constantτw1/τw2 5 / 630 s
Operating temperature range -40 ... 100 °C
Winding temperature, max. 125 °C
Mass 127 g
Direction of rotation electronically reversible
Speed up tonmax. 10000 min⁻¹
Number of pole pairs 7
Hall sensors digital
Magnet material NdFeB

Values at 22° and nominal voltageValue
Nominal voltageUN 24 V
Terminal resistance, phase-phaseR 0.74 Ω
Efficiency, max.ηmax. 87 %
No-load speedn0 5960 min⁻¹
No-load currentI0 0.186 A
Friction torque, staticC0 2 mNm
Friction torque, dynamicCV 5.63 ·10⁻⁴ mNm/min⁻¹
Speed constantkn 253 min⁻¹/V
Back-EMF constantkE 3.95 mV/min⁻¹
Torque constantkM 37.7 mNm/A
Current constantkI 0.0265 A/mNm
Slope of n-M curveΔn/ΔM 4.97 min⁻¹/mNm
Terminal inductance, phase-phaseL 664 µH
Mechanical time constantτm 3.59 ms
Rotor inertiaJ 69 gcm²
Angular accelerationαmax. 177 ·10³rad/s²
Thermal resistanceRth1/Rth2 3 / 14.5 K/W
Thermal time constantτw1/τw2 5 / 630 s
Operating temperature range -40 ... 100 °C
Winding temperature, max. 125 °C
Mass 127 g
Direction of rotation electronically reversible
Speed up tonmax. 10000 min⁻¹
Number of pole pairs 7
Hall sensors digital
Magnet material NdFeB

Values at 22° and nominal voltageValue
Nominal voltageUN 24 V
Terminal resistance, phase-phaseR 0.74 Ω
Efficiency, max.ηmax. 87 %
No-load speedn0 5960 min⁻¹
No-load currentI0 0.186 A
Friction torque, staticC0 2 mNm
Friction torque, dynamicCV 5.63 ·10⁻⁴ mNm/min⁻¹
Speed constantkn 253 min⁻¹/V
Back-EMF constantkE 3.95 mV/min⁻¹
Torque constantkM 37.7 mNm/A
Current constantkI 0.0265 A/mNm
Slope of n-M curveΔn/ΔM 4.97 min⁻¹/mNm
Terminal inductance, phase-phaseL 664 µH
Mechanical time constantτm 3.59 ms
Rotor inertiaJ 69 gcm²
Angular accelerationαmax. 177 ·10³rad/s²
Thermal resistanceRth1/Rth2 3 / 14.5 K/W
Thermal time constantτw1/τw2 5 / 630 s
Operating temperature range -40 ... 100 °C
Winding temperature, max. 125 °C
Mass 127 g
Direction of rotation electronically reversible
Speed up tonmax. 10000 min⁻¹
Number of pole pairs 7
Hall sensors digital
Magnet material NdFeB

Values at 22° and nominal voltageValue
Nominal voltageUN 48 V
Terminal resistance, phase-phaseR 2.6 Ω
Efficiency, max.ηmax. 88 %
No-load speedn0 6070 min⁻¹
No-load currentI0 0.074 A
Friction torque, staticC0 2 mNm
Friction torque, dynamicCV 5.63 ·10⁻⁴ mNm/min⁻¹
Speed constantkn 127 min⁻¹/V
Back-EMF constantkE 7.87 mV/min⁻¹
Torque constantkM 75.2 mNm/A
Current constantkI 0.0133 A/mNm
Slope of n-M curveΔn/ΔM 4.4 min⁻¹/mNm
Terminal inductance, phase-phaseL 2550 µH
Mechanical time constantτm 3.18 ms
Rotor inertiaJ 69 gcm²
Angular accelerationαmax. 201 ·10³rad/s²
Thermal resistanceRth1/Rth2 3 / 14.5 K/W
Thermal time constantτw1/τw2 5 / 630 s
Operating temperature range -40 ... 100 °C
Winding temperature, max. 125 °C
Mass 127 g
Direction of rotation electronically reversible
Speed up tonmax. 10000 min⁻¹
Number of pole pairs 7
Hall sensors digital
Magnet material NdFeB

Values at 22° and nominal voltageValue
Nominal voltageUN 48 V
Terminal resistance, phase-phaseR 2.6 Ω
Efficiency, max.ηmax. 88 %
No-load speedn0 6070 min⁻¹
No-load currentI0 0.074 A
Friction torque, staticC0 2 mNm
Friction torque, dynamicCV 5.63 ·10⁻⁴ mNm/min⁻¹
Speed constantkn 127 min⁻¹/V
Back-EMF constantkE 7.87 mV/min⁻¹
Torque constantkM 75.2 mNm/A
Current constantkI 0.0133 A/mNm
Slope of n-M curveΔn/ΔM 4.4 min⁻¹/mNm
Terminal inductance, phase-phaseL 2550 µH
Mechanical time constantτm 3.18 ms
Rotor inertiaJ 69 gcm²
Angular accelerationαmax. 201 ·10³rad/s²
Thermal resistanceRth1/Rth2 3 / 14.5 K/W
Thermal time constantτw1/τw2 5 / 630 s
Operating temperature range -40 ... 100 °C
Winding temperature, max. 125 °C
Mass 127 g
Direction of rotation electronically reversible
Speed up tonmax. 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 Umot >UN.

Characteristic curves of motor
Characteristic curves of motor (4221G018BXTR)
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 Umot >UN.

Characteristic curves of motor
Characteristic curves of motor (4221G024BXTR)
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 Umot >UN.

Characteristic curves of motor
Characteristic curves of motor (4221G048BXTR)
Planetary Gearheads
FAULHABER GPT
42GPT Series  by FAULHABER
Series 42GPT
High Torque
Drive Electronics
Speed Controllers
SC 2804 S Series  by FAULHABER
Series SC 2804 S
2-Quadrant PWM configurable via PC
SC 5004 P Series  by FAULHABER
Series SC 5004 P
4-Quadrant PWM configurable via PC
SC 5008 S Series  by FAULHABER
Series SC 5008 S
4-Quadrant PWM configurable via PC

Download

pdf
Datasheet
pdf
Technical Information
zip
3D-CAD Files

Application note

pdf
AN 163 - Digital Hall Sensors
pdf
AN 183 - Equivalent DC-current in FAULHABER SC and MC
pdf
AN 190 - Selection of a third-party motor driver
FAULHABER BXT Series 4221 ... BXT R by FAULHABER
FAULHABER BXT Series 4221 ... BXT R by FAULHABER
FAULHABER BXT Series 4221 ... BXT R by FAULHABER
FAULHABER BXT Series 4221 ... BXT R by FAULHABER
FAULHABER BXT Series 4221 ... BXT R by FAULHABER
FAULHABER BXT Series 4221 ... BXT R by FAULHABER
Your Choice
Selected Variant
Series 4221G018BXTR
External rotor technology, without housing
Key Features
Nominal voltage: 18 V
Rated torque up to: 122 mNm
No-load speed up to: 5670 min⁻¹
Diameter: 42 mm
Length: 21.2 mm
Selected Variant
Series 4221G024BXTR
External rotor technology, without housing
Key Features
Nominal voltage: 24 V
Rated torque up to: 127 mNm
No-load speed up to: 5960 min⁻¹
Diameter: 42 mm
Length: 21.2 mm
Selected Variant
Series 4221G048BXTR
External rotor technology, without housing
Key Features
Nominal voltage: 48 V
Rated torque up to: 134 mNm
No-load speed up to: 6070 min⁻¹
Diameter: 42 mm
Length: 21.2 mm

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