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Coreless Brushed DC Motors

High Performance with Less Energy
  • 7.4 DC Coreless Brushed Motor - Side View

    16mm Coreless Brushed Planetary Gear Motor

  • 7.4V DC Coreless Brushed Gear Motor

    16mm Coreless Brushed Planetary Gear Motor

ISL’s coreless brushed dc motors have excellent performance and simple motor control all within a compact size. Coreless dc motor technology differs from the standard brushed type of motor, a.k.a cored motor, in that the rotor winding is wound onto itself, on the rotor. No iron is on the rotor, making the lighter, coreless (or ironless core) rotor spin at a given performance level with less required input energy.

ISL coreless brushed electric motors are constructed with high-quality materials and are best used in applications that require a small electric motor with rapid acceleration.

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Benefits

A direct current coreless motor is a great choice for applications that require any of the following:

  • High Speed
  • Compact Design
  • Quiet Operation
  • Continuous Torque
  • Energy Efficient Motors
  • Low Rotor Inertia
  • No Cogging Torque
  • Lower Power Consumption
  • Low Inductance

How does a coreless motor function?

Coreless brushed motors function similarly to traditional or cored brushed motors. With a coreless design, magnetic fields are induced by applying current and voltage to the rotor windings, which react with the  permanent magnet on the stator to convert electrical energy into mechanical energy. A coreless dc motor is typically constructed with rare earth magnets to maximize performance and mechanical strength from such a small form factor. An electric micro motor like this needs the best materials in order to have a high starting torque and rapid mechanical time constant.

The removal of the iron core, within the housing cylinder, leads to other advantages as well. Armature Windings dissipate heat more efficiently without an iron core holding onto the heat in the middle of the motor. This improved thermal performance allows a coreless dc motor to to radiate its heat through the casing, removing the need for air holes of active cooling.  In turn the sealed casings help to reduce both audible noise as well as electrical noise or EMI, making coreless motor well suited for applications sensitive to electromagnetic interference.

Motor Design Notes

Coreless motors are revolutionizing the micro-automation industry. An encoder or hall sensor can be attached to a dc electric motor to create a coreless brushed servo motor. A mini motor like this can be used in place of a stepper motor to save on weight. Miniature motors in general have seen a rise in popularity, as more machines and devices incorporate them for their unique advantages.

Benefits

A direct current coreless motor is a great choice for applications that require any of the following:

  • High Speed
  • Compact Design
  • Quiet Operation
  • Continuous Torque
  • Energy Efficient Motors
  • Low Rotor Inertia
  • No Cogging Torque
  • Lower Power Consumption
  • Low Inductance

Applications

ISL’s coreless dc brushed motors and gear motors can be found inside a wide range of revolutionary devices.

  • Portable Battery-Powered Devices
  • Medical Devices
  • Automated Blinds / Roller Shades
  • Door Openers
  • Precision Laboratory Equipment
  • Small Pumps
  • Analytical Instrumentation
  • X-Ray Machines

Parameters

ISL is committed to working with you to design and manufacture a coreless brush motor solution specific to your application needs.

  • Brush Type: Carbon / Precious Metal / Other
  • Commutator Material: Precious Metal / Graphite
  • Nominal Voltage
  • Output load speed
  • Power Rating
  • No-Load and Maximum Current
  • Load Torque
  • Rotor Inertia
  • Ambient Temperature Range
  • Motor Shaft Material & Size
  • Motor Shaft Configuration: Offset / Concentric / D Cut / Round / Splined / Other
  • Overall motor size, Diameter (L, W, H)
  • Encoder Type: Optical / Hall Effect
  • Additional Assembly Requirements (lead wires, connectors, pulley, gear, etc.)