Brushless DC-Servomotors Series 2057 ... BA

2 Pole Technology, High Speed,
for Autoclave Sterilisation

Key Features

Nominal voltage:

24 V

Rated torque up to:

13.7 mNm

No-load speed up to:

44300 min⁻¹

Stall torque up to:

309 mNm

Diameter:

20 mm

Length:

57 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	24 V
Terminal resistance, phase-phase	R	0.427 Ω
Efficiency, max.	η_max.	90 %
No-load speed	n₀	44300 min⁻¹
No-load current	I₀	0.178 A
Stall torque	M_H	309 mNm
Friction torque, static	C₀	0.0559 mNm
Friction torque, dynamic	C_V	1.95 ·10⁻⁵ mNm/min⁻¹
Speed constant	k_n	1740 min⁻¹/V
Back-EMF constant	k_E	0.576 mV/min⁻¹
Torque constant	k_M	5.5 mNm/A
Current constant	k_I	0.182 A/mNm
Slope of n-M curve	Δn/ΔM	135 min⁻¹/mNm
Terminal inductance, phase-phase	L	36.2 µH
Mechanical time constant	τ_m	4.2 ms
Rotor inertia	J	3 gcm²
Angular acceleration	α_max.	1030 ·10³rad/s²
Thermal resistance	R_th1/R_th2	1.1 / 15 K/W
Thermal time constant	τ_w1/τ_w2	5 / 630 s
Operating temperature range		-30 ... 140 °C
Winding temperature, max.		140 °C
Housing material		stainless steel
Mass		100 g
Direction of rotation		electronically reversible
Speed up to	n_max.	65000 min⁻¹
Number of pole pairs		1
Hall sensors		digital
Magnet material		NdFeB

Operating Area

Recommended operation areas at nominal voltage 24 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