Brushless DC-Servomotors Series 4221 ... BXT H SC

with integrated Speed Controller
external rotor technology, with housing

Key Features

Nominal voltage:

24 V

Rated torque up to:

92 mNm

No-load speed up to:

6200 min⁻¹

Diameter:

42 mm

Length:

28 mm

Advantages

High torque and speed rigidity thanks to 14-pole technology

Speed control in tight installation spaces; thanks to the high number of poles of the motors, also available in the low speed range from 200 min-1

Modular, diameter-compliant mounting concept with integrated current limitation

Simple and convenient programming using the Motion Manager and programming adapter

High reliability and long service life

Second shaft end available in sizes 32 and 42 mm

Variants:

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	24 V
Terminal resistance, phase-phase	R	0.74 Ω
Efficiency, max.	η_max.	87 %
No-load speed	n₀	6200 min⁻¹
No-load current	I₀	0.139 A
Stall torque	M_H	1220 mNm
Friction torque, static	C₀	2 mNm
Friction torque, dynamic	C_V	0.000563 mNm/min⁻¹
Speed constant	k_n	253 min⁻¹/V
Torque constant	k_M	37.7 mNm/A
Slope of n-M curve	Δn/ΔM	4.97 min⁻¹/mNm
Terminal inductance, phase-phase	L	664 µH
Mechanical time constant	τ_m	3.59 ms
Rotor inertia	J	69 gcm²
Thermal resistance	R_th1/R_th2	3 / 14.5 K/W
Thermal time constant	τ_w1/τ_w2	5 / 870 s
Operating temperature range		-40 ... 100 °C
Winding temperature, max.		125 °C
Housing material		stainless steel
Mass		142 g
Number of pole pairs		7
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	24 V
Terminal resistance, phase-phase	R	0.74 Ω
Efficiency, max.	η_max.	87 %
No-load speed	n₀	6200 min⁻¹
No-load current	I₀	0.139 A
Stall torque	M_H	1220 mNm
Friction torque, static	C₀	2 mNm
Friction torque, dynamic	C_V	0.000563 mNm/min⁻¹
Speed constant	k_n	253 min⁻¹/V
Torque constant	k_M	37.7 mNm/A
Slope of n-M curve	Δn/ΔM	4.97 min⁻¹/mNm
Terminal inductance, phase-phase	L	664 µH
Mechanical time constant	τ_m	3.59 ms
Rotor inertia	J	69 gcm²
Thermal resistance	R_th1/R_th2	3 / 14.5 K/W
Thermal time constant	τ_w1/τ_w2	5 / 870 s
Operating temperature range		-40 ... 100 °C
Winding temperature, max.		125 °C
Housing material		stainless steel
Mass		142 g
Number of pole pairs		7
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	24 V
Terminal resistance, phase-phase	R	0.74 Ω
Efficiency, max.	η_max.	87 %
No-load speed	n₀	6200 min⁻¹
No-load current	I₀	0.139 A
Stall torque	M_H	1220 mNm
Friction torque, static	C₀	2 mNm
Friction torque, dynamic	C_V	0.000563 mNm/min⁻¹
Speed constant	k_n	253 min⁻¹/V
Torque constant	k_M	37.7 mNm/A
Slope of n-M curve	Δn/ΔM	4.97 min⁻¹/mNm
Terminal inductance, phase-phase	L	664 µH
Mechanical time constant	τ_m	3.59 ms
Rotor inertia	J	69 gcm²
Thermal resistance	R_th1/R_th2	3 / 14.5 K/W
Thermal time constant	τ_w1/τ_w2	5 / 870 s
Operating temperature range		-40 ... 100 °C
Winding temperature, max.		125 °C
Housing material		stainless steel
Mass		142 g
Number of pole pairs		7
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	24 V
Terminal resistance, phase-phase	R	0.74 Ω
Efficiency, max.	η_max.	87 %
No-load speed	n₀	6200 min⁻¹
No-load current	I₀	0.139 A
Stall torque	M_H	1220 mNm
Friction torque, static	C₀	2 mNm
Friction torque, dynamic	C_V	0.000563 mNm/min⁻¹
Speed constant	k_n	253 min⁻¹/V
Torque constant	k_M	37.7 mNm/A
Slope of n-M curve	Δn/ΔM	4.97 min⁻¹/mNm
Terminal inductance, phase-phase	L	664 µH
Mechanical time constant	τ_m	3.59 ms
Rotor inertia	J	69 gcm²
Thermal resistance	R_th1/R_th2	3 / 14.5 K/W
Thermal time constant	τ_w1/τ_w2	5 / 870 s
Operating temperature range		-40 ... 100 °C
Winding temperature, max.		125 °C
Housing material		stainless steel
Mass		142 g
Number of pole pairs		7
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