FAULHABER CR Series 3257 ... CR by FAULHABER

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Datasheet

Variants

DC-Micromotors Series 3257 ... CR

Graphite Commutation

Key Features

Nominal voltage:

12 ... 48 V

Rated torque up to:

73.1 mNm

No-load speed up to:

6240 min⁻¹

Stall torque up to:

570 mNm

Diameter:

32 mm

Length:

57 mm

Advantages

Best dynamic performance due to a low rotor inertia

Shockproof all-steel housing with corrosion-resistant coating

Powerful rare-earth magnet

Extremely wide operating temperature range -30 °C to 125 °C (optionally -55 °C, winding up to 155 °C)

Durable graphite commutation

No cogging

Highest power density

Variants:

Series 3257G012CR

Series 3257G018CR

Series 3257G024CR

Series 3257G036CR

Series 3257G048CR

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	12 V
Terminal resistance	R	0.407 Ω
Efficiency, max.	η_max.	79 %
No-load speed	n₀	5880 min⁻¹
No-load current	I₀	0.265 A
Stall torque	M_H	536 mNm
Friction torque	M_R	4.9 mNm
Speed constant	k_n	499 min⁻¹/V
Back-EMF constant	k_E	2 mV/min⁻¹
Torque constant	k_M	19.1 mNm/A
Current constant	k_I	0.052 A/mNm
Slope of n-M curve	Δn/ΔM	10.6 min⁻¹/mNm
Rotor inductance	L	68.6 µH
Mechanical time constant	τ_m	4.7 ms
Rotor inertia	J	42 gcm²
Angular acceleration	α_max.	130 ·10³rad/s²
Thermal resistance	R_th1/R_th2	3.4 / 10.3 K/W
Thermal time constant	τ_w1/τ_w2	36 / 1016.2 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		155 °C
Housing material		steel, nickel plated
Mass		242 g
Direction of rotation		clockwise, viewed from the front face
Speed up to	n_max.	7000 min⁻¹
Number of pole pairs		1
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	18 V
Terminal resistance	R	0.837 Ω
Efficiency, max.	η_max.	80 %
No-load speed	n₀	6240 min⁻¹
No-load current	I₀	0.185 A
Stall torque	M_H	570 mNm
Friction torque	M_R	4.9 mNm
Speed constant	k_n	347 min⁻¹/V
Back-EMF constant	k_E	2.84 mV/min⁻¹
Torque constant	k_M	27.5 mNm/A
Current constant	k_I	0.037 A/mNm
Slope of n-M curve	Δn/ΔM	10.6 min⁻¹/mNm
Rotor inductance	L	142 µH
Mechanical time constant	τ_m	4.7 ms
Rotor inertia	J	41 gcm²
Angular acceleration	α_max.	140 ·10³rad/s²
Thermal resistance	R_th1/R_th2	3.4 / 10.3 K/W
Thermal time constant	τ_w1/τ_w2	36 / 1016.2 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		155 °C
Housing material		steel, nickel plated
Mass		242 g
Direction of rotation		clockwise, viewed from the front face
Speed up to	n_max.	7000 min⁻¹
Number of pole pairs		1
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	24 V
Terminal resistance	R	1.63 Ω
Efficiency, max.	η_max.	80 %
No-load speed	n₀	6010 min⁻¹
No-load current	I₀	0.133 A
Stall torque	M_H	548 mNm
Friction torque	M_R	4.9 mNm
Speed constant	k_n	250 min⁻¹/V
Back-EMF constant	k_E	3.95 mV/min⁻¹
Torque constant	k_M	38.3 mNm/A
Current constant	k_I	0.027 A/mNm
Slope of n-M curve	Δn/ΔM	10.6 min⁻¹/mNm
Rotor inductance	L	274 µH
Mechanical time constant	τ_m	4.7 ms
Rotor inertia	J	41 gcm²
Angular acceleration	α_max.	130 ·10³rad/s²
Thermal resistance	R_th1/R_th2	3.4 / 10.3 K/W
Thermal time constant	τ_w1/τ_w2	36 / 1016.2 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		155 °C
Housing material		steel, nickel plated
Mass		242 g
Direction of rotation		clockwise, viewed from the front face
Speed up to	n_max.	7000 min⁻¹
Number of pole pairs		1
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	36 V
Terminal resistance	R	4.15 Ω
Efficiency, max.	η_max.	80 %
No-load speed	n₀	5680 min⁻¹
No-load current	I₀	0.083 A
Stall torque	M_H	517 mNm
Friction torque	M_R	4.9 mNm
Speed constant	k_n	157 min⁻¹/V
Back-EMF constant	k_E	6.4 mV/min⁻¹
Torque constant	k_M	61.1 mNm/A
Current constant	k_I	0.016 A/mNm
Slope of n-M curve	Δn/ΔM	10.6 min⁻¹/mNm
Rotor inductance	L	697 µH
Mechanical time constant	τ_m	4.7 ms
Rotor inertia	J	42 gcm²
Angular acceleration	α_max.	120 ·10³rad/s²
Thermal resistance	R_th1/R_th2	3.4 / 10.3 K/W
Thermal time constant	τ_w1/τ_w2	36 / 1016.2 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		155 °C
Housing material		steel, nickel plated
Mass		242 g
Direction of rotation		clockwise, viewed from the front face
Speed up to	n_max.	7000 min⁻¹
Number of pole pairs		1
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	48 V
Terminal resistance	R	6.56 Ω
Efficiency, max.	η_max.	81 %
No-load speed	n₀	6070 min⁻¹
No-load current	I₀	0.0663 A
Stall torque	M_H	549 mNm
Friction torque	M_R	4.9 mNm
Speed constant	k_n	125 min⁻¹/V
Back-EMF constant	k_E	7.98 mV/min⁻¹
Torque constant	k_M	76.6 mNm/A
Current constant	k_I	0.013 A/mNm
Slope of n-M curve	Δn/ΔM	10.7 min⁻¹/mNm
Rotor inductance	L	1100 µH
Mechanical time constant	τ_m	4.7 ms
Rotor inertia	J	42 gcm²
Angular acceleration	α_max.	130 ·10³rad/s²
Thermal resistance	R_th1/R_th2	3.4 / 10.3 K/W
Thermal time constant	τ_w1/τ_w2	36 / 1016.2 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		155 °C
Housing material		steel, nickel plated
Mass		242 g
Direction of rotation		clockwise, viewed from the front face
Speed up to	n_max.	7000 min⁻¹
Number of pole pairs		1
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	12 V
Terminal resistance	R	0.407 Ω
Efficiency, max.	η_max.	79 %
No-load speed	n₀	5880 min⁻¹
No-load current	I₀	0.265 A
Stall torque	M_H	536 mNm
Friction torque	M_R	4.9 mNm
Speed constant	k_n	499 min⁻¹/V
Back-EMF constant	k_E	2 mV/min⁻¹
Torque constant	k_M	19.1 mNm/A
Current constant	k_I	0.052 A/mNm
Slope of n-M curve	Δn/ΔM	10.6 min⁻¹/mNm
Rotor inductance	L	68.6 µH
Mechanical time constant	τ_m	4.7 ms
Rotor inertia	J	42 gcm²
Angular acceleration	α_max.	130 ·10³rad/s²
Thermal resistance	R_th1/R_th2	3.4 / 10.3 K/W
Thermal time constant	τ_w1/τ_w2	36 / 1016.2 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		155 °C
Housing material		steel, nickel plated
Mass		242 g
Direction of rotation		clockwise, viewed from the front face
Speed up to	n_max.	7000 min⁻¹
Number of pole pairs		1
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	18 V
Terminal resistance	R	0.837 Ω
Efficiency, max.	η_max.	80 %
No-load speed	n₀	6240 min⁻¹
No-load current	I₀	0.185 A
Stall torque	M_H	570 mNm
Friction torque	M_R	4.9 mNm
Speed constant	k_n	347 min⁻¹/V
Back-EMF constant	k_E	2.84 mV/min⁻¹
Torque constant	k_M	27.5 mNm/A
Current constant	k_I	0.037 A/mNm
Slope of n-M curve	Δn/ΔM	10.6 min⁻¹/mNm
Rotor inductance	L	142 µH
Mechanical time constant	τ_m	4.7 ms
Rotor inertia	J	41 gcm²
Angular acceleration	α_max.	140 ·10³rad/s²
Thermal resistance	R_th1/R_th2	3.4 / 10.3 K/W
Thermal time constant	τ_w1/τ_w2	36 / 1016.2 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		155 °C
Housing material		steel, nickel plated
Mass		242 g
Direction of rotation		clockwise, viewed from the front face
Speed up to	n_max.	7000 min⁻¹
Number of pole pairs		1
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	24 V
Terminal resistance	R	1.63 Ω
Efficiency, max.	η_max.	80 %
No-load speed	n₀	6010 min⁻¹
No-load current	I₀	0.133 A
Stall torque	M_H	548 mNm
Friction torque	M_R	4.9 mNm
Speed constant	k_n	250 min⁻¹/V
Back-EMF constant	k_E	3.95 mV/min⁻¹
Torque constant	k_M	38.3 mNm/A
Current constant	k_I	0.027 A/mNm
Slope of n-M curve	Δn/ΔM	10.6 min⁻¹/mNm
Rotor inductance	L	274 µH
Mechanical time constant	τ_m	4.7 ms
Rotor inertia	J	41 gcm²
Angular acceleration	α_max.	130 ·10³rad/s²
Thermal resistance	R_th1/R_th2	3.4 / 10.3 K/W
Thermal time constant	τ_w1/τ_w2	36 / 1016.2 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		155 °C
Housing material		steel, nickel plated
Mass		242 g
Direction of rotation		clockwise, viewed from the front face
Speed up to	n_max.	7000 min⁻¹
Number of pole pairs		1
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	36 V
Terminal resistance	R	4.15 Ω
Efficiency, max.	η_max.	80 %
No-load speed	n₀	5680 min⁻¹
No-load current	I₀	0.083 A
Stall torque	M_H	517 mNm
Friction torque	M_R	4.9 mNm
Speed constant	k_n	157 min⁻¹/V
Back-EMF constant	k_E	6.4 mV/min⁻¹
Torque constant	k_M	61.1 mNm/A
Current constant	k_I	0.016 A/mNm
Slope of n-M curve	Δn/ΔM	10.6 min⁻¹/mNm
Rotor inductance	L	697 µH
Mechanical time constant	τ_m	4.7 ms
Rotor inertia	J	42 gcm²
Angular acceleration	α_max.	120 ·10³rad/s²
Thermal resistance	R_th1/R_th2	3.4 / 10.3 K/W
Thermal time constant	τ_w1/τ_w2	36 / 1016.2 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		155 °C
Housing material		steel, nickel plated
Mass		242 g
Direction of rotation		clockwise, viewed from the front face
Speed up to	n_max.	7000 min⁻¹
Number of pole pairs		1
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	48 V
Terminal resistance	R	6.56 Ω
Efficiency, max.	η_max.	81 %
No-load speed	n₀	6070 min⁻¹
No-load current	I₀	0.0663 A
Stall torque	M_H	549 mNm
Friction torque	M_R	4.9 mNm
Speed constant	k_n	125 min⁻¹/V
Back-EMF constant	k_E	7.98 mV/min⁻¹
Torque constant	k_M	76.6 mNm/A
Current constant	k_I	0.013 A/mNm
Slope of n-M curve	Δn/ΔM	10.7 min⁻¹/mNm
Rotor inductance	L	1100 µH
Mechanical time constant	τ_m	4.7 ms
Rotor inertia	J	42 gcm²
Angular acceleration	α_max.	130 ·10³rad/s²
Thermal resistance	R_th1/R_th2	3.4 / 10.3 K/W
Thermal time constant	τ_w1/τ_w2	36 / 1016.2 s
Operating temperature range		-30 ... 125 °C
Winding temperature, max.		155 °C
Housing material		steel, nickel plated
Mass		242 g
Direction of rotation		clockwise, viewed from the front face
Speed up to	n_max.	7000 min⁻¹
Number of pole pairs		1
Magnet material		NdFeB

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

Operating Area

Recommended operation areas at nominal voltage 18 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).

Characteristic curves of motor

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).

Characteristic curves of motor

Operating Area

Recommended operation areas at nominal voltage 36 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).

Characteristic curves of motor

Operating Area

Recommended operation areas at nominal voltage 48 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).

Characteristic curves of motor

3D-CAD Files ZIP

Precision Gearheads

Planetary Gearheads

Series 32/3R