Encoder

Custom Design

New products infomation
HOME  >  Technical Information  >  Coreless motor

Coreless motor


♦ The micro DC coreless motors are "small and high-performance" series motors realized by advanced precision machining technology and original winding technology that offer high outputs and controllability.
♦ In addition to the existing f 12 - 17.55 series, f 10, f 21 and f 24 coreless motors have been developed for use in wider applications.
♦ Our coreless motors have lower rotor inertia than that of DC iron core motors, the response is superior. Also due to no cogging, vibration and noise are smaller to offer better controllability.
♦ A wide variety of combination with magnetic/optical rotary encoders and various gearheads are possible for our coreless motors.
♦ Our coreless motors are able to design Custom-tuned specifications for brush materials, winding, ball bearings, etc.

Type Diameter Length Rated output
SCR10-17xx  NEW f10 17.0 0.27W
SCR10-25xx  NEW f10 24.6 0.62W
SCR12-13xx f12 13.2 0.12W
SCR12-18xx f12 18.5 0.34W
SCR12-26xx f12 26.3 0.96W
SCR13-20xx f13 20.5 1.10W
SCR13-28xx f13 29.0 2.00W
SCR16-25xx f16 26.2 2.08W
SCR16-35xx f16 36.2 1.46W
SCR17-35xx f17 36.2 4.23W
SCR18-37xx f18 36.8 5.20W
SC21-37xx  NEW f21 36.8 6.20W
SC24-32xx  NEW f24 32.0 10.01W
 
Features of DC Motor Coreless Iron core
Cogging
Responsibility
Efficiency
Rectification
Cost

Features of Brush Material Precious metal Graphite
Electric noise
Large current load
Forward/reverse repetition
Continuous high speed
PWM/PLL control

    Coreless motor
 
    (1) Terminal
    (2) Brush base
    (3) Brush
    (4) Commutator
    (5) Coil
    (6) Shaft
    (7) Bearing
    (8) Magnet
    (9) Housing
    (10) Bearing
Coreless motor

    Iron core motor
 
    (1) Terminal
    (2) Brush base
    (3) Brush
    (4) Bearing
    (5) Shaft
    (6) Commutator
    (7) Coil
    (8) Iron core
    (9) Magnet
    (10) Housing
    (11) Bearing
Iron core motor

♦ Rated voltage[ V ]
  A voltage that is required to run a motor at the rated load and rated speed. (A voltage when applied to between DC motor terminals.) The rated voltage to use must be 10% of the marked voltage. (Please contact us for use outside this range.)
 
♦ No-load speed[ min-1 ]
  Speed per minute when a motor is run at the rated voltage under no load.
 
♦ No-load current[ mA ]
  A value of current when a motor is run at the rated voltage under no load.
 
♦ Starting torque[ mNm ]
  Maximum current that flows at the rated voltage when a DC motor is started or locked.
 
♦ Starting current[ mA ]
  Maximum current that flows when the rated voltage is applied.
      
 
♦ Output[ W ]
  The DC motor output can be calculated by the following equation:
      
 
♦ Maximum efficiency[ % ]
  The maximum value of the input-to-output ratio.
 
♦ Terminal resistance[ O ]
  Resistance between winding/brush and commutator/terminal or lead wire. A value of resistance measured between terminals of a DC motor. In the case of the graphite brush, the resistance changes according to current.
 
♦ Rotor moment of inertia[ gcm2 ]
  Moment of inertia of the mass of the rotor.
 
♦ Rotor inductance[ mH ]
  An approximate value measured between terminals of a DC motor with a measuring frequency of 1 kHz.
 
♦ Mechanical time constant[ ms ]
  A constant (tm) that indicates a time required by the DC motor from rising from the rest state to reaching 63.2% of the no-load Speed.
   Mechanical time constant
♦ Torque constant[ mNm/A ]
  Torque that occurs when current is 1A.
      
 
♦ Winding allowable temperature[ C ]
  Winding employed is insulating heat-resistant type B (130C).
  If you need special heat resistance, please contact us.
  Winding allowable temperature

 
 
Contact
CITIZEN MICRO Co.,Ltd.
DC Motor Division
15-1,2 Choume,Fujimi,
Sayama City,Saitama,
350-1306,Japan
motor@micro.citizen.co.jp
 
Contact Form

Catalog Download