DC-Micromotors Series 1727 ... CXR

Graphite Commutation

Key Features

Nominal voltage:

6 ... 24 V

Rated torque up to:

4.9 mNm

No-load speed up to:

7600 min⁻¹

Stall torque up to:

12.2 mNm

Diameter:

17 mm

Length:

27.2 mm

Advantages

Highly dynamic performance due to a low rotor inertia

Shockproof all-steel housing with corrosion-resistant coating

Powerful rare-earth magnet

Wide operating temperature range: -30 °C to +100 °C (optional -55 °C)

Durable graphite commutation

No cogging

Very high power density

Variants:

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	6 V
Terminal resistance	R	3.06 Ω
Efficiency, max.	η_max.	63 %
No-load speed	n₀	7300 min⁻¹
No-load current	I₀	0.052 A
Stall torque	M_H	12.2 mNm
Friction torque	M_R	0.36 mNm
Speed constant	k_n	1362 min⁻¹/V
Back-EMF constant	k_E	0.734 mV/min⁻¹
Torque constant	k_M	7.01 mNm/A
Current constant	k_I	0.143 A/mNm
Slope of n-M curve	Δn/ΔM	595 min⁻¹/mNm
Rotor inductance	L	80 µH
Mechanical time constant	τ_m	8.1 ms
Rotor inertia	J	1.3 gcm²
Angular acceleration	α_max.	94 ·10³rad/s²
Thermal resistance	R_th1/R_th2	9.1 / 28.3 K/W
Thermal time constant	τ_w1/τ_w2	7 / 340 s
Operating temperature range		-30 ... 100 °C
Winding temperature, max.		125 °C
Housing material		steel, nickel plated
Mass		28 g
Direction of rotation		clockwise, viewed from the front face
Speed up to	n_max.	9000 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	13.78 Ω
Efficiency, max.	η_max.	65 %
No-load speed	n₀	7600 min⁻¹
No-load current	I₀	0.026 A
Stall torque	M_H	11.4 mNm
Friction torque	M_R	0.36 mNm
Speed constant	k_n	681 min⁻¹/V
Back-EMF constant	k_E	1.47 mV/min⁻¹
Torque constant	k_M	14.03 mNm/A
Current constant	k_I	0.071 A/mNm
Slope of n-M curve	Δn/ΔM	668 min⁻¹/mNm
Rotor inductance	L	320 µH
Mechanical time constant	τ_m	8.4 ms
Rotor inertia	J	1.2 gcm²
Angular acceleration	α_max.	95 ·10³rad/s²
Thermal resistance	R_th1/R_th2	9.1 / 28.3 K/W
Thermal time constant	τ_w1/τ_w2	7 / 340 s
Operating temperature range		-30 ... 100 °C
Winding temperature, max.		125 °C
Housing material		steel, nickel plated
Mass		28 g
Direction of rotation		clockwise, viewed from the front face
Speed up to	n_max.	9000 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	57.6 Ω
Efficiency, max.	η_max.	66 %
No-load speed	n₀	7600 min⁻¹
No-load current	I₀	0.013 A
Stall torque	M_H	11.4 mNm
Friction torque	M_R	0.36 mNm
Speed constant	k_n	332 min⁻¹/V
Back-EMF constant	k_E	3.01 mV/min⁻¹
Torque constant	k_M	28.73 mNm/A
Current constant	k_I	0.035 A/mNm
Slope of n-M curve	Δn/ΔM	666 min⁻¹/mNm
Rotor inductance	L	1440 µH
Mechanical time constant	τ_m	8.4 ms
Rotor inertia	J	1.2 gcm²
Angular acceleration	α_max.	95 ·10³rad/s²
Thermal resistance	R_th1/R_th2	9.1 / 28.3 K/W
Thermal time constant	τ_w1/τ_w2	7 / 340 s
Operating temperature range		-30 ... 100 °C
Winding temperature, max.		125 °C
Housing material		steel, nickel plated
Mass		28 g
Direction of rotation		clockwise, viewed from the front face
Speed up to	n_max.	9000 min⁻¹
Number of pole pairs		1
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal voltage	U_N	6 V
Terminal resistance	R	3.06 Ω
Efficiency, max.	η_max.	63 %
No-load speed	n₀	7300 min⁻¹
No-load current	I₀	0.052 A
Stall torque	M_H	12.2 mNm
Friction torque	M_R	0.36 mNm
Speed constant	k_n	1362 min⁻¹/V
Back-EMF constant	k_E	0.734 mV/min⁻¹
Torque constant	k_M	7.01 mNm/A
Current constant	k_I	0.143 A/mNm
Slope of n-M curve	Δn/ΔM	595 min⁻¹/mNm
Rotor inductance	L	80 µH
Mechanical time constant	τ_m	8.1 ms
Rotor inertia	J	1.3 gcm²
Angular acceleration	α_max.	94 ·10³rad/s²
Thermal resistance	R_th1/R_th2	9.1 / 28.3 K/W
Thermal time constant	τ_w1/τ_w2	7 / 340 s
Operating temperature range		-30 ... 100 °C
Winding temperature, max.		125 °C
Housing material		steel, nickel plated
Mass		28 g
Direction of rotation		clockwise, viewed from the front face
Speed up to	n_max.	9000 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	13.78 Ω
Efficiency, max.	η_max.	65 %
No-load speed	n₀	7600 min⁻¹
No-load current	I₀	0.026 A
Stall torque	M_H	11.4 mNm
Friction torque	M_R	0.36 mNm
Speed constant	k_n	681 min⁻¹/V
Back-EMF constant	k_E	1.47 mV/min⁻¹
Torque constant	k_M	14.03 mNm/A
Current constant	k_I	0.071 A/mNm
Slope of n-M curve	Δn/ΔM	668 min⁻¹/mNm
Rotor inductance	L	320 µH
Mechanical time constant	τ_m	8.4 ms
Rotor inertia	J	1.2 gcm²
Angular acceleration	α_max.	95 ·10³rad/s²
Thermal resistance	R_th1/R_th2	9.1 / 28.3 K/W
Thermal time constant	τ_w1/τ_w2	7 / 340 s
Operating temperature range		-30 ... 100 °C
Winding temperature, max.		125 °C
Housing material		steel, nickel plated
Mass		28 g
Direction of rotation		clockwise, viewed from the front face
Speed up to	n_max.	9000 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	57.6 Ω
Efficiency, max.	η_max.	66 %
No-load speed	n₀	7600 min⁻¹
No-load current	I₀	0.013 A
Stall torque	M_H	11.4 mNm
Friction torque	M_R	0.36 mNm
Speed constant	k_n	332 min⁻¹/V
Back-EMF constant	k_E	3.01 mV/min⁻¹
Torque constant	k_M	28.73 mNm/A
Current constant	k_I	0.035 A/mNm
Slope of n-M curve	Δn/ΔM	666 min⁻¹/mNm
Rotor inductance	L	1440 µH
Mechanical time constant	τ_m	8.4 ms
Rotor inertia	J	1.2 gcm²
Angular acceleration	α_max.	95 ·10³rad/s²
Thermal resistance	R_th1/R_th2	9.1 / 28.3 K/W
Thermal time constant	τ_w1/τ_w2	7 / 340 s
Operating temperature range		-30 ... 100 °C
Winding temperature, max.		125 °C
Housing material		steel, nickel plated
Mass		28 g
Direction of rotation		clockwise, viewed from the front face
Speed up to	n_max.	9000 min⁻¹
Number of pole pairs		1
Magnet material		NdFeB

Operating Area

Recommended operation areas at nominal voltage 6 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