Brushless Motor

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

Because the rotor is free of other objects (no brush), it is designed for high power, and noise-less by principle. It is suitable for long-life use.

Output Because of no-contact design (no brush/commutator like cored/coreless motor), large current can be input and heat in the coil dissipates quickly
Life Long life time because of no-contact design
Control Linear characteristics
Cogging No magnetic cogging

In our brushless motor, we removed the mechanical contacts such as brushes and commutators used in conventional brushed motors, and applied an electric signal to take their place. The brushless motor requires an electric circuit board because there is no commutator. This motor (circuit board) has two types, one with a magnetic sensor, and the other with no sensor. The one with the magnetic sensor detects its position via the sensor, and the other detects the rotor magnet position via back-EMF. Brushless motor's features are as follows:

Features
  1. Stator coil is located outside in inner rotor type brushless motor. Therefore, it is good in heat dissipation.
    Because there are no contacts (brush/commutator), large current can be input to answer to high power needs.
  2. No mechanical noise and no electric noise for switching current(no brush and no commutator)
  3. Long life and high reliability (due to no-contact design)

In Namiki's brushless motor, stator is a slot-less core with cup-shaped coil, and rotor is the magnet inside. Therefore, magnetic force is even regardless of coil/magnet position, and motor rotation is free of cogging.

Issues & Challenges in Brushless Motor

As brushless motors have no mechanical contacts for polarity switching, they have high power and long lifespan. However, due to the rotating magnet core, the inertia is much larger than that of coreless brushed motor and the response time slower.
Namiki presents brushless motors that address these issues equally.

Brushless Motor Standard Model

Dia.
[mm]
Length
[mm]
Products Nominal
Voltage
[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]
4 8 BMN04-0829 3.0 0.014 24,200 53 0.04 37,000 28 0.04 0.1 0.04 22
10 10 BMS10-1003 7.4 0.44 52,300 810 2.4 71,700 300 1.6 2.2 3.0 40
BMS10-1007 12 0.43 55,000 540 2.5 76,300 210 1.5 1.4 3.1 38
18 BMS10-1802 7.4 0.72 31,600 470 2.4 37,200 84 4.7 2.7 4.6 68
BMS10-1806 12 0.70 32,800 300 2.4 38,900 56 4.5 1.6 4.6 66
12 15 BMS12-1503 7.4 0.93 28,200 570 2.7 33,700 112 5.7 2.9 5.0 65
BMS12-1506 12 0.92 30,300 380 2.9 36,200 74 5.5 1.9 5.3 64
21 BMS12-2102 7.4 1.4 19,600 530 2.9 22,300 73 11.7 4.2 6.9 74
BMS12-2104 12 1.4 21,300 350 3.2 24,300 49 11.6 2.8 7.4 74
16 20 BMS16-2001 7.4 2.0 19,500 740 4.2 22,000 94 18.0 5.8 10.4 76
BMS16-2004 12 1.9 19,600 440 4.0 22,000 59 16.4 3.3 9.6 75
BMS16-2013 24 2.0 21,000 240 4.3 23,700 31 16.8 1.8 10.4 75
30 BMS16-3001 7.4 3.0 15,900 810 5.0 17,300 74 36.1 9.0 16.4 83
BMS16-3002 12 3.0 16,300 510 5.1 17,800 47 35.4 5.6 16.5 83
BMS16-3009 24 9.0 16,200 240 4.8 17,800 23 32.6 2.6 15.2 82
22 32 B4S22-32 24 9.0 4,894 255 11.2 5,540 34 77.15 1.93 4.0 75
BMN04-0829
Dia.[mm]
4
Length[mm]
8
NominalVoltage[V]
3.0
Nominal:Torque[mNm]
0.014
Nominal:Speed[rpm]
24200
Nominal:Current[mA]
53
Nominal:OutputPower[W]
0.04
No-load:Speed[rpm]
37000
No-load:Current[mA]
28
Stall:Torque[mNm]
0.04
Stall:Current[mA]
0.1
Mechanical time constant[ms]
0.04
Max.efficiency
22
BMS10-1003
Dia.[mm]
10
Length[mm]
10
NominalVoltage[V]
7.4
Nominal:Torque[mNm]
0.44
Nominal:Speed[rpm]
52300
Nominal:Current[mA]
810
Nominal:OutputPower[W]
2.4
No-load:Speed[rpm]
71700
No-load:Current[mA]
300
Stall:Torque[mNm]
1.6
Stall:Current[mA]
2.2
Mechanical time constant[ms]
3.0
Max.efficiency
40
BMS10-1007
Dia.[mm]
10
Length[mm]
10
NominalVoltage[V]
12
Nominal:Torque[mNm]
0.43
Nominal:Speed[rpm]
55000
Nominal:Current[mA]
540
Nominal:OutputPower[W]
2.5
No-load:Speed[rpm]
76300
No-load:Current[mA]
210
Stall:Torque[mNm]
1.5
Stall:Current[mA]
1.4
Mechanical time constant[ms]
3.1
Max.efficiency
38
BMS10-1802
Dia.[mm]
10
Length[mm]
18
NominalVoltage[V]
7.4
Nominal:Torque[mNm]
0.72
Nominal:Speed[rpm]
31600
Nominal:Current[mA]
470
Nominal:OutputPower[W]
2.4
No-load:Speed[rpm]
37200
No-load:Current[mA]
84
Stall:Torque[mNm]
4.7
Stall:Current[mA]
2.7
Mechanical time constant[ms]
4.6
Max.efficiency
68
BMS10-1806
Dia.[mm]
10
Length[mm]
18
NominalVoltage[V]
12
Nominal:Torque[mNm]
0.70
Nominal:Speed[rpm]
32800
Nominal:Current[mA]
300
Nominal:OutputPower[W]
2.4
No-load:Speed[rpm]
38900
No-load:Current[mA]
56
Stall:Torque[mNm]
4.5
Stall:Current[mA]
1.6
Mechanical time constant[ms]
4.6
Max.efficiency
66
BMS12-1503
Dia.[mm]
12
Length[mm]
15
NominalVoltage[V]
7.4
Nominal:Torque[mNm]
0.93
Nominal:Speed[rpm]
28200
Nominal:Current[mA]
570
Nominal:OutputPower[W]
2.7
No-load:Speed[rpm]
33700
No-load:Current[mA]
112
Stall:Torque[mNm]
5.7
Stall:Current[mA]
2.9
Mechanical time constant[ms]
5.0
Max.efficiency
65
BMS12-1506
Dia.[mm]
12
Length[mm]
15
NominalVoltage[V]
12
Nominal:Torque[mNm]
0.92
Nominal:Speed[rpm]
30300
Nominal:Current[mA]
380
Nominal:OutputPower[W]
2.9
No-load:Speed[rpm]
36200
No-load:Current[mA]
74
Stall:Torque[mNm]
5.5
Stall:Current[mA]
1.9
Mechanical time constant[ms]
5.3
Max.efficiency
64
BMS12-2102
Dia.[mm]
12
Length[mm]
21
NominalVoltage[V]
7.4
Nominal:Torque[mNm]
1.4
Nominal:Speed[rpm]
19600
Nominal:Current[mA]
530
Nominal:OutputPower[W]
2.9
No-load:Speed[rpm]
22300
No-load:Current[mA]
73
Stall:Torque[mNm]
11.7
Stall:Current[mA]
4.2
Mechanical time constant[ms]
6.9
Max.efficiency
74
BMS12-2104
Dia.[mm]
12
Length[mm]
21
NominalVoltage[V]
12
Nominal:Torque[mNm]
1.4
Nominal:Speed[rpm]
21300
Nominal:Current[mA]
350
Nominal:OutputPower[W]
3.2
No-load:Speed[rpm]
24300
No-load:Current[mA]
49
Stall:Torque[mNm]
11.6
Stall:Current[mA]
2.8
Mechanical time constant[ms]
7.4
Max.efficiency
74
BMS16-2001
Dia.[mm]
16
Length[mm]
20
NominalVoltage[V]
7.4
Nominal:Torque[mNm]
2.0
Nominal:Speed[rpm]
19500
Nominal:Current[mA]
740
Nominal:OutputPower[W]
4.2
No-load:Speed[rpm]
22000
No-load:Current[mA]
94
Stall:Torque[mNm]
18.0
Stall:Current[mA]
5.8
Mechanical time constant[ms]
10.4
Max.efficiency
76
BMS16-2004
Dia.[mm]
16
Length[mm]
20
NominalVoltage[V]
12
Nominal:Torque[mNm]
1.9
Nominal:Speed[rpm]
19600
Nominal:Current[mA]
440
Nominal:OutputPower[W]
4.0
No-load:Speed[rpm]
22000
No-load:Current[mA]
59
Stall:Torque[mNm]
16.4
Stall:Current[mA]
3.3
Mechanical time constant[ms]
9.6
Max.efficiency
75
BMS16-2013
Dia.[mm]
16
Length[mm]
20
NominalVoltage[V]
24
Nominal:Torque[mNm]
2.0
Nominal:Speed[rpm]
21000
Nominal:Current[mA]
240
Nominal:OutputPower[W]
4.3
No-load:Speed[rpm]
23700
No-load:Current[mA]
31
Stall:Torque[mNm]
16.8
Stall:Current[mA]
1.8
Mechanical time constant[ms]
10.4
Max.efficiency
75
BMS16-3001
Dia.[mm]
16
Length[mm]
30
NominalVoltage[V]
7.4
Nominal:Torque[mNm]
3.0
Nominal:Speed[rpm]
15900
Nominal:Current[mA]
810
Nominal:OutputPower[W]
5.0
No-load:Speed[rpm]
17300
No-load:Current[mA]
74
Stall:Torque[mNm]
36.1
Stall:Current[mA]
9.0
Mechanical time constant[ms]
16.4
Max.efficiency
83
BMS16-3002
Dia.[mm]
16
Length[mm]
30
NominalVoltage[V]
12
Nominal:Torque[mNm]
3.0
Nominal:Speed[rpm]
16300
Nominal:Current[mA]
510
Nominal:OutputPower[W]
5.1
No-load:Speed[rpm]
17800
No-load:Current[mA]
47
Stall:Torque[mNm]
35.4
Stall:Current[mA]
5.6
Mechanical time constant[ms]
16.5
Max.efficiency
83
BMS16-3009
Dia.[mm]
16
Length[mm]
30
NominalVoltage[V]
24
Nominal:Torque[mNm]
9.0
Nominal:Speed[rpm]
16200
Nominal:Current[mA]
240
Nominal:OutputPower[W]
4.8
No-load:Speed[rpm]
17800
No-load:Current[mA]
23
Stall:Torque[mNm]
32.6
Stall:Current[mA]
2.6
Mechanical time constant[ms]
15.2
Max.efficiency
82
B4S22-32
Dia.[mm]
22
Length[mm]
32
NominalVoltage[V]
24
Nominal:Torque[mNm]
9.0
Nominal:Speed[rpm]
4894
Nominal:Current[mA]
255
Nominal:OutputPower[W]
11.2
No-load:Speed[rpm]
5540
No-load:Current[mA]
34
Stall:Torque[mNm]
77.15
Stall:Current[mA]
1.93
Mechanical time constant[ms]
4.0
Max.efficiency
75

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。

Outer Rotor Pancake Brushless Motor

Dia. [mm] Thickness [mm] Products Nominal Voltage [V] No-load Stall
Speed [rpm] Currevt [A] Toreque [mNm] Current [A]
23 12 SOBL23-1207 12 5730 0.127 26.8 1.38
SOBL23-1207
Dia. [mm]
23
Thickness [mm]
12
Nominal Voltage [V]
12
No-load:Speed [rpm]
5730
No-load:Currevt [A]
0.127
Stall:Toreque [mNm]
26.8
Stall:Current [A]
1.38

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