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4pole High Torque Motor

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dyNAMIXモータ
Specialized Model
   Uniqueness of Namiki Coreless DC Motor lies in its coil windings.
   By applying 4-pole magnet, effective magnet density area is enlarged,
   and the torque constant is greatly enhanced.

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.


4極高トルクモータの画像
   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%.

 

 
Brushed Motor
Dia.
[mm]
Length
[mm]
Products
Nomi
nal
Vol
tage
[V]
Nominal
No-load
Stall
Mecha
nical
time
cons
tant
[ms]
Max.
effic
iency
[%]
Tor
que
[mNm]
Speed
[rpm]
Cur
rent
[mA]
Output
Power
[W]
Speed
[rpm]
Cur
revt
[mA]
Tor
eque
[mNm]
Cur
rent
[A]
10
12
C4S10-1207
4.7
0.26
13,700
120
0.37
16,200
21
1.7
0.66
3.6
0.73
 
Brushless Motor
Dia.
[mm]
Length
[mm]
Products
Nomi
nal
Vol
tage
[V]
Nominal
No-load
Stall
Mecha
nical
time
cons
tant
[ms]
Max.
effic
iency
[%]
Tor
que
[mNm]
Speed
[rpm]
Cur
rent
[mA]
Output
Power
[W]
Speed
[rpm]
Cur
revt
[mA]
Tor
eque
[mNm]
Cur
rent
[A]
17.4
15
B4S17-1501
7.4
2.8
17,700
930
5.2
20,000
122
24.1
7.0
5.1
13
22
32
24
9.0
4,894
255
11.2
5540
34
77.15
1.93
4.0
75
 
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