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Adamant Namiki Precision Jewel Co., Ltd. will change its name on Jan. 1, 2023.

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4pole High Torque Motor

By applying 4-pole magnet, effective magnet density area is enlarged, and the torque constant is greatly enhanced.

4pole High Torque Motor

Features

Effective magnet density area: +30% (Namiki test result)
Total magnetic flux increased +30% from 2 pole magnet.
Torque constant: +60% (Namiki test result)
When running with the same road, current consumption is 35% less than 2-pole magnet motor.
Mechanical time constant: -60% (Namiki test result)
With enhanced torque constant, response speed is also improved by 40%.

As a pioneer in coreless motors, Namiki has pursued development of high torque motors. Generating high torque by enlarging the magnet or inputting a large current has its limitations in terms of heat generation and magnet materials. Namiki tried to increase torque by increasing number of magnet poles form 2 to 4.
By applying a 4-pole magnet, the effective magnet density area is enlarged. As a result, it contributed to a higher torque constant and low current consumption. Moreover, it enhanced mechanical time constant, so even the response speed became quicker.
Using diamond processing technology, a 4-pole magnet processing method has been established in Namiki.

Brushed Motor

Products Dia.
[mm]
Length
[mm]
Nominal
Voltage
[V]
Nominal No-load Stall Mecha
nical
time
constant
[ms]
Max.
effici
ency
CAD
download
Torque
[mNm]
Speed
[rpm]
Current
[mA]
Output
Power
[W]
Speed
[rpm]
Current
[mA]
Torque
[mNm]
Current
[A]
Encoder
with no
C4S10-13XX 10 13 4.7 0.28 13500 136 0.7 16300 28 1.66 0.66 4.9 63 2D
3D
2D
3D

Brushless Motor

Products Dia
[mm]
Length
[mm]
Nominal
Voltage
[V]
Nominal No-load Stall Mecha
nical
time
constant
[ms]
Max.
effici
ency
CAD
download
Torque
[mNm]
Speed
[rpm]
Current
[mA]
Output
Power
[W]
Speed
[rpm]
Current
[mA]
Torque
[mNm]
Current
[A]
Encoder
with no
B4S12-2108 12 21 12.0 11.1 13111 277 4.5 15320 55 11.1 1.59 3.5 66.3 2D
3D
2D
3D
B4S12-2109 15.0 11.6 16646 279 5.9 19300 56 11.6 1.68 4.2 66.8 2D
3D
2D
3D
B4S22-32XX with Planetary gear 22 32 24.0 9.0 4900 255 11.2 5540 34 77.15 1.93 4.0 75 2D
3D
2D
3D

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