Brushless DC-Servomotors Series 1660 ... BHS

2 Pole Technology

Key Features

Nominal voltage:

24 ... 48 V

Rated torque up to:

11.6 mNm

No-load speed up to:

60100 min⁻¹

Stall torque up to:

442 mNm

Diameter:

16 mm

Length:

60 mm

Advantages

Large power up to 96 W in small diameter

High speed close to 100‘000 min-1 (BHS version)

Huge impulsive torque > 30 mNm (BHT version)

Very dynamic and responsive with low inertia

Low vibration and low noise, suitable for handtools

Optional integrated encoder

Variants:

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	24 V
Terminal resistance, phase-phase	R	0.29 Ω
Efficiency, max.	η_max.	92 %
No-load speed	n₀	52400 min⁻¹
No-load current	I₀	0.147 A
Stall torque	M_H	385 mNm
Friction torque, static	C₀	0.16 mNm
Friction torque, dynamic	C_V	9.43 ·10⁻⁶ mNm/min⁻¹
Speed constant	k_n	2038 min⁻¹/V
Back-EMF constant	k_E	0.491 mV/min⁻¹
Torque constant	k_M	4.69 mNm/A
Current constant	k_I	0.21 A/mNm
Slope of n-M curve	Δn/ΔM	127 min⁻¹/mNm
Terminal inductance, phase-phase	L	29 µH
Mechanical time constant	τ_m	1.2 ms
Rotor inertia	J	0.9 gcm²
Angular acceleration	α_max.	4278 ·10³rad/s²
Thermal resistance	R_th1/R_th2	2.1 / 18.2 K/W
Thermal time constant	τ_w1/τ_w2	6.3 / 638 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		125 °C
Housing material		stainless steel
Mass		78 g
Direction of rotation		electronically reversible
Speed up to	n_max.	97000 min⁻¹
Number of pole pairs		1
Hall sensors		digital
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	24 V
Terminal resistance, phase-phase	R	0.29 Ω
Efficiency, max.	η_max.	92 %
No-load speed	n₀	52400 min⁻¹
No-load current	I₀	0.147 A
Stall torque	M_H	385 mNm
Friction torque, static	C₀	0.16 mNm
Friction torque, dynamic	C_V	9.43 ·10⁻⁶ mNm/min⁻¹
Speed constant	k_n	2038 min⁻¹/V
Back-EMF constant	k_E	0.491 mV/min⁻¹
Torque constant	k_M	4.69 mNm/A
Current constant	k_I	0.21 A/mNm
Slope of n-M curve	Δn/ΔM	127 min⁻¹/mNm
Terminal inductance, phase-phase	L	29 µH
Mechanical time constant	τ_m	1.2 ms
Rotor inertia	J	0.9 gcm²
Angular acceleration	α_max.	4278 ·10³rad/s²
Thermal resistance	R_th1/R_th2	2.1 / 18.2 K/W
Thermal time constant	τ_w1/τ_w2	6.3 / 638 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		125 °C
Housing material		stainless steel
Mass		78 g
Direction of rotation		electronically reversible
Speed up to	n_max.	97000 min⁻¹
Number of pole pairs		1
Hall sensors		digital
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	36 V
Terminal resistance, phase-phase	R	0.51 Ω
Efficiency, max.	η_max.	92 %
No-load speed	n₀	60100 min⁻¹
No-load current	I₀	0.123 A
Stall torque	M_H	442 mNm
Friction torque, static	C₀	0.16 mNm
Friction torque, dynamic	C_V	9.43 ·10⁻⁶ mNm/min⁻¹
Speed constant	k_n	1527 min⁻¹/V
Back-EMF constant	k_E	0.655 mV/min⁻¹
Torque constant	k_M	6.26 mNm/A
Current constant	k_I	0.16 A/mNm
Slope of n-M curve	Δn/ΔM	124 min⁻¹/mNm
Terminal inductance, phase-phase	L	52 µH
Mechanical time constant	τ_m	1.2 ms
Rotor inertia	J	0.9 gcm²
Angular acceleration	α_max.	4914 ·10³rad/s²
Thermal resistance	R_th1/R_th2	2.1 / 18.2 K/W
Thermal time constant	τ_w1/τ_w2	6.3 / 638 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		125 °C
Housing material		stainless steel
Mass		78 g
Direction of rotation		electronically reversible
Speed up to	n_max.	97000 min⁻¹
Number of pole pairs		1
Hall sensors		digital
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	36 V
Terminal resistance, phase-phase	R	0.51 Ω
Efficiency, max.	η_max.	92 %
No-load speed	n₀	60100 min⁻¹
No-load current	I₀	0.123 A
Stall torque	M_H	442 mNm
Friction torque, static	C₀	0.16 mNm
Friction torque, dynamic	C_V	9.43 ·10⁻⁶ mNm/min⁻¹
Speed constant	k_n	1527 min⁻¹/V
Back-EMF constant	k_E	0.655 mV/min⁻¹
Torque constant	k_M	6.26 mNm/A
Current constant	k_I	0.16 A/mNm
Slope of n-M curve	Δn/ΔM	124 min⁻¹/mNm
Terminal inductance, phase-phase	L	52 µH
Mechanical time constant	τ_m	1.2 ms
Rotor inertia	J	0.9 gcm²
Angular acceleration	α_max.	4914 ·10³rad/s²
Thermal resistance	R_th1/R_th2	2.1 / 18.2 K/W
Thermal time constant	τ_w1/τ_w2	6.3 / 638 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		125 °C
Housing material		stainless steel
Mass		78 g
Direction of rotation		electronically reversible
Speed up to	n_max.	97000 min⁻¹
Number of pole pairs		1
Hall sensors		digital
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	48 V
Terminal resistance, phase-phase	R	1.12 Ω
Efficiency, max.	η_max.	92 %
No-load speed	n₀	53600 min⁻¹
No-load current	I₀	0.076 A
Stall torque	M_H	394 mNm
Friction torque, static	C₀	0.16 mNm
Friction torque, dynamic	C_V	9.43 ·10⁻⁶ mNm/min⁻¹
Speed constant	k_n	1037 min⁻¹/V
Back-EMF constant	k_E	0.964 mV/min⁻¹
Torque constant	k_M	9.21 mNm/A
Current constant	k_I	0.11 A/mNm
Slope of n-M curve	Δn/ΔM	127 min⁻¹/mNm
Terminal inductance, phase-phase	L	112 µH
Mechanical time constant	τ_m	1.2 ms
Rotor inertia	J	0.9 gcm²
Angular acceleration	α_max.	4372 ·10³rad/s²
Thermal resistance	R_th1/R_th2	2.1 / 18.2 K/W
Thermal time constant	τ_w1/τ_w2	6.3 / 638 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		125 °C
Housing material		stainless steel
Mass		78 g
Direction of rotation		electronically reversible
Speed up to	n_max.	97000 min⁻¹
Number of pole pairs		1
Hall sensors		digital
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	48 V
Terminal resistance, phase-phase	R	1.12 Ω
Efficiency, max.	η_max.	92 %
No-load speed	n₀	53600 min⁻¹
No-load current	I₀	0.076 A
Stall torque	M_H	394 mNm
Friction torque, static	C₀	0.16 mNm
Friction torque, dynamic	C_V	9.43 ·10⁻⁶ mNm/min⁻¹
Speed constant	k_n	1037 min⁻¹/V
Back-EMF constant	k_E	0.964 mV/min⁻¹
Torque constant	k_M	9.21 mNm/A
Current constant	k_I	0.11 A/mNm
Slope of n-M curve	Δn/ΔM	127 min⁻¹/mNm
Terminal inductance, phase-phase	L	112 µH
Mechanical time constant	τ_m	1.2 ms
Rotor inertia	J	0.9 gcm²
Angular acceleration	α_max.	4372 ·10³rad/s²
Thermal resistance	R_th1/R_th2	2.1 / 18.2 K/W
Thermal time constant	τ_w1/τ_w2	6.3 / 638 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		125 °C
Housing material		stainless steel
Mass		78 g
Direction of rotation		electronically reversible
Speed up to	n_max.	97000 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