Brushless DC-Servomotors Series 1628 ... B

2 Pole Technology

Key Features

Nominal voltage:

12 ... 24 V

Rated torque up to:

2.74 mNm

No-load speed up to:

31600 min⁻¹

Stall torque up to:

11 mNm

Diameter:

16 mm

Length:

28 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	12 V
Terminal resistance, phase-phase	R	4.36 Ω
Efficiency, max.	η_max.	68 %
No-load speed	n₀	30800 min⁻¹
No-load current	I₀	0.087 A
Stall torque	M_H	9.79 mNm
Friction torque, static	C₀	0.148 mNm
Friction torque, dynamic	C_V	5.33 ·10⁻⁶ mNm/min⁻¹
Speed constant	k_n	2645 min⁻¹/V
Back-EMF constant	k_E	0.378 mV/min⁻¹
Torque constant	k_M	3.61 mNm/A
Current constant	k_I	0.277 A/mNm
Slope of n-M curve	Δn/ΔM	3195 min⁻¹/mNm
Terminal inductance, phase-phase	L	134 µH
Mechanical time constant	τ_m	18.1 ms
Rotor inertia	J	0.54 gcm²
Angular acceleration	α_max.	181 ·10³rad/s²
Thermal resistance	R_th1/R_th2	5.6 / 22.5 K/W
Thermal time constant	τ_w1/τ_w2	5.7 / 283 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		125 °C
Housing material		aluminium, black anodized
Mass		30 g
Direction of rotation		electronically reversible
Speed up to	n_max.	70000 min⁻¹
Number of pole pairs		1
Hall sensors		digital
Magnet material		SmCo

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	24 V
Terminal resistance, phase-phase	R	15.2 Ω
Efficiency, max.	η_max.	69 %
No-load speed	n₀	31600 min⁻¹
No-load current	I₀	0.045 A
Stall torque	M_H	11 mNm
Friction torque, static	C₀	0.148 mNm
Friction torque, dynamic	C_V	5.33 ·10⁻⁶ mNm/min⁻¹
Speed constant	k_n	1349 min⁻¹/V
Back-EMF constant	k_E	0.741 mV/min⁻¹
Torque constant	k_M	7.08 mNm/A
Current constant	k_I	0.141 A/mNm
Slope of n-M curve	Δn/ΔM	2896 min⁻¹/mNm
Terminal inductance, phase-phase	L	517 µH
Mechanical time constant	τ_m	16.4 ms
Rotor inertia	J	0.54 gcm²
Angular acceleration	α_max.	204 ·10³rad/s²
Thermal resistance	R_th1/R_th2	5.6 / 22.5 K/W
Thermal time constant	τ_w1/τ_w2	5.7 / 283 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		125 °C
Housing material		aluminium, black anodized
Mass		30 g
Direction of rotation		electronically reversible
Speed up to	n_max.	70000 min⁻¹
Number of pole pairs		1
Hall sensors		digital
Magnet material		SmCo

Operating Area

Recommended operation areas at nominal voltage 12 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