Brushed Motor

Coreless moving coil is light weight, superior in quick starting and stopping (high speed response).

ブラシレスモーター
Efficiency High efficiency and no iron loss
Responsiveness Very low inertia and able to start/stop quickly
Life Low inductance and long life
Control Linear characteristics
Cogging No magnetic cogging
Electromagnetic noise Low electromagnetic interference

Brushed coreless motor does not have an iron core, and consists of a cup-shaped core as rotor and a permanent magnet inside the rotor as stator. Brushed coreless motor features the following: Coreless motor features the following:

Features

  1. Cup-shaped rotor coil is very light weight and has a small moment of inertia, allowing the motor to start and stop quickly.
  2. Because there is no cogging due to stator-rotor positioning, it features smooth rotation, low noise and low vibration.
  3. Motor can be made in compact sizes because it is made only of rare earth magnet, coil and rotor.

For the reasons mentioned above, our brushed coreless motor is used in many applications that require high precision, high speed response, as well as compactness and high efficiency.

Issues & challenges in Brushed Motor

The primary factors affecting the lifespan of brushed motors are abrasion due to rotational contact of the brush and commutator, and electric corrosion during polarity switching. While precious metal contact material minimizes the electric corrosion, physical abrasion remains an issue. Changing the brush material to carbon-based can prevent the mechanical wearing, but at the same time, this can increase electric spark noise. In general, brushed motors are not suitable for power motors because they can't accept large flow of electric current.
Namiki presents brushed coreless motors that address these issues equally.

Brushed Motor Standard Model

Dia.
[mm]
Length
[mm]
Products Nomi
nal
Vol
tage
[V]
Nominal No-load Stall Mecha
nical
time
constant
[ms]
Max.
effici
ency
Torque
[mNm]
Speed
[rpm]
Current
[mA]
Output
Power
[W]
Speed
[rpm]
Current
[mA]
Torque
[mNm]
Current
[A]
CMS07-1707 7 17 3.7 0.14 17,100 104 0.5 20,200 19 0.94 0.57 6.8 67
CMS07-1726 7.4 0.14 18,600 54 0.5 22,100 10 0.84 0.28 7.5 65
CMS10-1306 10 13 3.7 0.14 17,900 103 0.5 21,100 18 0.92 0.59 11.3 68
CMS10-1321 7.4 0.14 20,900 61 0.6 24,500 10 0.96 0.35 11.8 68
CMS10-1346 12.0 0.14 24,500 45 0.7 28,700 8 1.0 0.26 12.3 69
CMS10-1805 18 3.7 0.27 10,400 116 0.6 12,200 19 1.89 0.69 7.0 69
CMS10-1818 7.4 0.27 12,500 70 0.7 14,600 12 1.91 0.42 7.3 69
CMS10-1834 12.0 0.29 15,500 56 1.0 18,000 9 2.16 0.36 7.5 71
CMS12-1506 12 15 7.4 0.44 21,900 186 2.2 25,100 27 3.40 1.26 15.4 73
CMS12-1514 12.0 0.43 23,700 123 2.4 27,200 18 3.36 0.83 15.9 73
CMS12-2004 20 7.4 0.44 20,400 150 3.2 22,200 13 5.48 1.74 8.9 83
CMS12-2010 12.0 0.45 20,400 99 3.5 23,000 8 5.77 1.17 8.8 82
CMS12-3005 30 7.4 0.79 11,800 162 2.9 13,000 16 8.55 1.61 5.5 81
CMS12-3010 12.0 0.83 13,700 121 3.7 15,000 12 9.40 1.25 5.6 82
CMS16-2304 16 23 7.4 0.89 13,000 209 3.3 14,500 24 8.78 1.85 9.3 79
CMS16-2309 12.0 0.94 14,000 145 3.9 15,500 16 9.67 1.34 9.3 80
CMS16-2337 24.0 0.89 14,900 73 3.8 16,600 8 8.66 0.64 9.5 79
CMS16-2805 28 7.4 1.03 8,100 146 2.6 8,900 15 11.05 1.42 5.9 81
CMS16-2812 12.0 1.08 8,400 97 2.9 9,200 10 12.14 0.99 6.0 81
CMS16-2852 24.0 1.02 8,700 48 2.7 9,600 5 10.85 0.47 6.1 80
CMS16-3302 33 7.4 1.63 9,500 250 6.9 10,100 17 26.13 3.76 4.4 87
CMS16-3306 12.0 1.58 9,300 147 6.4 9,900 10 24.66 2.15 4.4 87
CMS16-3317 24.0 1.69 10,900 92 8.5 11,600 6 28.09 1.43 4.4 88

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