Brushed Motor

Uniqueness of Namiki Coreless DC Motor lies in its coil windings.

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

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
[mA]
7 17 CMS07-1707 3.7 0.14 17,100 101 0.25 20,300 19 0.86 0.53 6.5 66
CMS07-1725 7.4 0.14 18,600 56 0.27 22,000 10 0.89 0.30 6.8 66
10 12 CMS10-1206 3.7 0.14 17,900 103 0.26 21,100 18 0.92 0.59 11 68
CMS10-1221 7.4 0.14 20,900 61 0.31 24,500 10 0.96 0.35 12 68
CMS10-1245 12.0 0.14 24,500 45 0.37 28,700 7.6 1.0 0.26 12 69
18 CMS10-1805 3.7 0.27 10,400 116 0.30 12,200 19 1.9 0.69 7.0 69
CMS10-1818 7.4 0.27 12,500 70 0.36 14,600 12 1.9 0.42 7.3 69
CMS10-1834 12.0 0.29 15,500 56 0.48 18,000 8.8 2.2 0.36 7.5 71
12 15 CMS12-1506 7.4 0.51 21,400 234 1.15 25,400 43 3.3 1.26 16 66
CMS12-1514 12.0 0.51 23,100 155 1.23 27,500 29 3.2 0.83 17 66
20 CMS12-2004 7.4 0.50 19,300 168 1.01 21,200 17 5.6 1.70 8.5 81
CMS12-2010 12.0 0.51 20,200 111 1.09 22,200 11 5.9 1.15 8.5 82
30 CMS12-3005 7.4 0.82 10,900 156 0.94 11,900 15 9.3 1.61 4.6 82
CMS12-3010 12.0 0.87 12,600 116 1.15 13,800 11 10 1.25 4.6 82
16 20 CMS16-2004 7.4 0.75 12,200 154 0.95 13,200 13 9.7 1.83 7.9 84
CMS16-2009 12.0 0.79 13,700 112 1.13 14,800 8.9 11 1.39 7.9 85
CMS16-2037 24.0 0.74 14,400 55 1.12 15,600 4.7 9.5 0.66 8.1 84
25 CMS16-2505 7.4 0.88 7,000 102 0.65 7,500 7.3 13 1.14 4.3 86
CMS16-2511 12.0 0.93 7,700 72 0.75 8,300 5.0 14 1.05 4.3 87
CMS16-2549 24.0 0.87 8,100 36 0.74 8,700 2.6 13 0.49 4.4 86
30 CMS16-3002 7.4 1.29 8,700 175 1.17 9,100 8.2 29 3.74 4.2 91
CMS16-3005 12.0 1.25 8,800 106 1.15 9,200 5.1 27 2.20 4.1 91
CMS16-3016 24.0 1.34 10,400 67 1.46 10,800 3.0 31 1.48 4.1 91
CMS07-1707
Dia.[mm]
7
Length[mm]
17
NominalVoltage[V]
3.7
Nominal:Torque[mNm]
0.14
Nominal:Speed[rpm]
17,100
Nominal:Current[mA]
101
Nominal:OutputPower[W]
0.25
No-load:Speed[rpm]
20,300
No-load:Current[mA]
19
Stall:Torque[mNm]
0.86
Stall:Current[mA]
0.53
Mechanical time constant[ms]
6.5
Max.efficiency
66
CMS07-1725
Dia.[mm]
7
Length[mm]
17
NominalVoltage[V]
7.4
Nominal:Torque[mNm]
0.14
Nominal:Speed[rpm]
18,600
Nominal:Current[mA]
56
Nominal:OutputPower[W]
0.27
No-load:Speed[rpm]
22,000
No-load:Current[mA]
10
Stall:Torque[mNm]
0.89
Stall:Current[mA]
0.30
Mechanical time constant[ms]
6.8
Max.efficiency
66
CMS10-1206
Dia.[mm]
10
Length[mm]
12
NominalVoltage[V]
3.7
Nominal:Torque[mNm]
0.14
Nominal:Speed[rpm]
17,900
Nominal:Current[mA]
103
Nominal:OutputPower[W]
0.26
No-load:Speed[rpm]
21,100
No-load:Current[mA]
18
Stall:Torque[mNm]
0.92
Stall:Current[mA]
0.59
Mechanical time constant[ms]
11
Max.efficiency
68
CMS10-1221
Dia.[mm]
10
Length[mm]
12
NominalVoltage[V]
7.4
Nominal:Torque[mNm]
0.14
Nominal:Speed[rpm]
20,900
Nominal:Current[mA]
61
Nominal:OutputPower[W]
0.31
No-load:Speed[rpm]
24,500
No-load:Current[mA]
10
Stall:Torque[mNm]
0.96
Stall:Current[mA]
0.35
Mechanical time constant[ms]
12
Max.efficiency
68
CMS10-1245
Dia.[mm]
10
Length[mm]
12
NominalVoltage[V]
12.0
Nominal:Torque[mNm]
0.14
Nominal:Speed[rpm]
24,500
Nominal:Current[mA]
45
Nominal:OutputPower[W]
0.37
No-load:Speed[rpm]
28,700
No-load:Current[mA]
7.6
Stall:Torque[mNm]
1.0
Stall:Current[mA]
0.26
Mechanical time constant[ms]
12
Max.efficiency
69
CMS10-1805
Dia.[mm]
10
Length[mm]
18
NominalVoltage[V]
3.7
Nominal:Torque[mNm]
0.27
Nominal:Speed[rpm]
10,400
Nominal:Current[mA]
116
Nominal:OutputPower[W]
0.30
No-load:Speed[rpm]
12,200
No-load:Current[mA]
19
Stall:Torque[mNm]
1.9
Stall:Current[mA]
0.69
Mechanical time constant[ms]
7.0
Max.efficiency
69
CMS10-1818
Dia.[mm]
10
Length[mm]
18
NominalVoltage[V]
7.4
Nominal:Torque[mNm]
0.27
Nominal:Speed[rpm]
12,500
Nominal:Current[mA]
70
Nominal:OutputPower[W]
0.36
No-load:Speed[rpm]
14,600
No-load:Current[mA]
12
Stall:Torque[mNm]
1.9
Stall:Current[mA]
0.42
Mechanical time constant[ms]
7.3
Max.efficiency
69
CMS10-1834
Dia.[mm]
10
Length[mm]
18
NominalVoltage[V]
12.0
Nominal:Torque[mNm]
0.29
Nominal:Speed[rpm]
15,500
Nominal:Current[mA]
56
Nominal:OutputPower[W]
0.48
No-load:Speed[rpm]
18,000
No-load:Current[mA]
8.8
Stall:Torque[mNm]
2.2
Stall:Current[mA]
0.36
Mechanical time constant[ms]
7.5
Max.efficiency
71
CMS12-1506
Dia.[mm]
12
Length[mm]
15
NominalVoltage[V]
7.4
Nominal:Torque[mNm]
0.51
Nominal:Speed[rpm]
21,400
Nominal:Current[mA]
234
Nominal:OutputPower[W]
1.15
No-load:Speed[rpm]
25,400
No-load:Current[mA]
43
Stall:Torque[mNm]
3.3
Stall:Current[mA]
1.26
Mechanical time constant[ms]
16
Max.efficiency
66
CMS12-1514
Dia.[mm]
12
Length[mm]
15
NominalVoltage[V]
12.0
Nominal:Torque[mNm]
0.51
Nominal:Speed[rpm]
23,100
Nominal:Current[mA]
155
Nominal:OutputPower[W]
1.23
No-load:Speed[rpm]
27,500
No-load:Current[mA]
29
Stall:Torque[mNm]
3.2
Stall:Current[mA]
0.83
Mechanical time constant[ms]
17
Max.efficiency
66
CMS12-2004
Dia.[mm]
12
Length[mm]
20
NominalVoltage[V]
7.4
Nominal:Torque[mNm]
0.50
Nominal:Speed[rpm]
19,300
Nominal:Current[mA]
168
Nominal:OutputPower[W]
1.01
No-load:Speed[rpm]
21,200
No-load:Current[mA]
17
Stall:Torque[mNm]
5.6
Stall:Current[mA]
1.70
Mechanical time constant[ms]
8.5
Max.efficiency
81
CMS12-2010
Dia.[mm]
12
Length[mm]
20
NominalVoltage[V]
12.0
Nominal:Torque[mNm]
0.51
Nominal:Speed[rpm]
20,200
Nominal:Current[mA]
111
Nominal:OutputPower[W]
1.09
No-load:Speed[rpm]
22,200
No-load:Current[mA]
11
Stall:Torque[mNm]
5.9
Stall:Current[mA]
1.15
Mechanical time constant[ms]
8.5
Max.efficiency
82
CMS12-3005
Dia.[mm]
12
Length[mm]
30
NominalVoltage[V]
7.4
Nominal:Torque[mNm]
0.82
Nominal:Speed[rpm]
10,900
Nominal:Current[mA]
156
Nominal:OutputPower[W]
0.94
No-load:Speed[rpm]
11,900
No-load:Current[mA]
15
Stall:Torque[mNm]
9.3
Stall:Current[mA]
1.61
Mechanical time constant[ms]
4.6
Max.efficiency
82
CMS12-3010
Dia.[mm]
12
Length[mm]
30
NominalVoltage[V]
12.0
Nominal:Torque[mNm]
0.87
Nominal:Speed[rpm]
12,600
Nominal:Current[mA]
116
Nominal:OutputPower[W]
1.15
No-load:Speed[rpm]
13,800
No-load:Current[mA]
11
Stall:Torque[mNm]
10
Stall:Current[mA]
1.25
Mechanical time constant[ms]
4.6
Max.efficiency
82
CMS16-2004
Dia.[mm]
16
Length[mm]
20
NominalVoltage[V]
7.4
Nominal:Torque[mNm]
0.75
Nominal:Speed[rpm]
12,200
Nominal:Current[mA]
154
Nominal:OutputPower[W]
0.95
No-load:Speed[rpm]
13,200
No-load:Current[mA]
13
Stall:Torque[mNm]
9.7
Stall:Current[mA]
1.83
Mechanical time constant[ms]
7.9
Max.efficiency
84
CMS16-2009
Dia.[mm]
16
Length[mm]
20
NominalVoltage[V]
12.0
Nominal:Torque[mNm]
0.79
Nominal:Speed[rpm]
13,700
Nominal:Current[mA]
112
Nominal:OutputPower[W]
1.13
No-load:Speed[rpm]
14,800
No-load:Current[mA]
8.9
Stall:Torque[mNm]
11
Stall:Current[mA]
1.39
Mechanical time constant[ms]
7.9
Max.efficiency
85
CMS16-2037
Dia.[mm]
16
Length[mm]
20
NominalVoltage[V]
24.0
Nominal:Torque[mNm]
0.74
Nominal:Speed[rpm]
14,400
Nominal:Current[mA]
55
Nominal:OutputPower[W]
1.12
No-load:Speed[rpm]
15,600
No-load:Current[mA]
4.7
Stall:Torque[mNm]
9.5
Stall:Current[mA]
0.66
Mechanical time constant[ms]
8.1
Max.efficiency
84
CMS16-2505
Dia.[mm]
16
Length[mm]
25
NominalVoltage[V]
7.4
Nominal:Torque[mNm]
0.88
Nominal:Speed[rpm]
7,000
Nominal:Current[mA]
102
Nominal:OutputPower[W]
0.65
No-load:Speed[rpm]
7,500
No-load:Current[mA]
7.3
Stall:Torque[mNm]
13
Stall:Current[mA]
1.14
Mechanical time constant[ms]
4.3
Max.efficiency
86
CMS16-2511
Dia.[mm]
16
Length[mm]
25
NominalVoltage[V]
12.0
Nominal:Torque[mNm]
0.93
Nominal:Speed[rpm]
7,700
Nominal:Current[mA]
72
Nominal:OutputPower[W]
0.75
No-load:Speed[rpm]
8,300
No-load:Current[mA]
5.0
Stall:Torque[mNm]
14
Stall:Current[mA]
1.05
Mechanical time constant[ms]
4.3
Max.efficiency
87
CMS16-2549
Dia.[mm]
16
Length[mm]
25
NominalVoltage[V]
24.0
Nominal:Torque[mNm]
0.87
Nominal:Speed[rpm]
8,100
Nominal:Current[mA]
36
Nominal:OutputPower[W]
0.74
No-load:Speed[rpm]
8,700
No-load:Current[mA]
2.6
Stall:Torque[mNm]
13
Stall:Current[mA]
0.49
Mechanical time constant[ms]
4.4
Max.efficiency
86
CMS16-3002
Dia.[mm]
16
Length[mm]
30
NominalVoltage[V]
7.4
Nominal:Torque[mNm]
1.29
Nominal:Speed[rpm]
8,700
Nominal:Current[mA]
175
Nominal:OutputPower[W]
1.17
No-load:Speed[rpm]
9,100
No-load:Current[mA]
8.2
Stall:Torque[mNm]
Stall:Current[mA]
3.74
Mechanical time constant[ms]
4.2
Max.efficiency
91
CMS16-3005
Dia.[mm]
16
Length[mm]
30
NominalVoltage[V]
12.0
Nominal:Torque[mNm]
1.25
Nominal:Speed[rpm]
8,800
Nominal:Current[mA]
106
Nominal:OutputPower[W]
1.15
No-load:Speed[rpm]
9,200
No-load:Current[mA]
5.1
Stall:Torque[mNm]
27
Stall:Current[mA]
2.20
Mechanical time constant[ms]
4.1
Max.efficiency
91
CMS16-3016
Dia.[mm]
16
Length[mm]
30
NominalVoltage[V]
24.0
Nominal:Torque[mNm]
1.34
Nominal:Speed[rpm]
10,400
Nominal:Current[mA]
67
Nominal:OutputPower[W]
1.46
No-load:Speed[rpm]
10,800
No-load:Current[mA]
3.0
Stall:Torque[mNm]
31
Stall:Current[mA]
1.48
Mechanical time constant[ms]
4.1
Max.efficiency
91

試作時最小ロット10台~ 量産時最少ロット200台~(年間1,000台~)より承っております。
詳細につきましてはご相談下さい。

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