32mm Brushless DC Motor – 70mm Type Model 3270RB

32mm Brushless Coreless Motor 3270RB

We can support 3270 Brushless Coreless Motor Small Volume Good Price

Lower vibration offering the best user's experience for customer.
Reliable and stable with long lifetime. 100% complete inspection of the materials after we get from our suppliers and products before ex-factory to ensure the quality for our customer.

 The perfect substitute for European motors which can save lots of time and cost for our customer to fit the qualified tattoo machine.

32mm Small Coreless Brushless Motor Parameters

We are the 30v micro coreless motors factory, high quality coreless dc motor, customized design service supported.

32mm x 70mm Brushless Motor Coreless Outline Drawing

Keywords:
36v dc motor, coreless dc motor, coreless motor, 32mm motor 

What is a hollow cup motor?

   The hollow cup motor breaks through the rotor structure of the traditional motor in structure, and adopts an ironless rotor, also called a hollow cup rotor. This novel rotor structure completely eliminates the power loss caused by eddy currents formed by the iron core.

   At the same time, its weight and moment of inertia are greatly reduced, thereby reducing the mechanical energy loss of the rotor itself. Due to the structural change of the rotor, the running characteristics of the motor have been greatly improved, which not only has outstanding energy-saving characteristics, but more importantly, has the control and drag characteristics that cannot be achieved by iron core motors.

   Hollow cup motors belong to DC permanent magnet motors, which can also be classified as micro-motors. The hollow cup motor has outstanding energy-saving characteristics, sensitive and convenient control characteristics and stable operation characteristics, and has obvious technical advantages. As a high-efficiency energy conversion device, it represents the development direction of electric motors in many fields.

Self-supporting winding technology of hollow cup motors

  The self-supporting winding of the hollow cup is made of enameled wire. The enameled wire is composed of two parts: copper conductor and insulating paint layer. After the bare wire is softened by annealing, it is painted and baked for many times. During the manufacturing process, the paint on adjacent copper wires is melted together by applying pressure and temperature. Paint is a thermoplastic that contains a solvent that makes it easy to mold. During the high temperature manufacturing process, the solvent gas escapes, the thermoplastic becomes hard, and the winding has a certain stability and stiffness. Proper bonding (tape or fiberglass) can further increase the strength and dimensional stability of the wrap. This is especially important in the case of high current and high load, because in the case of high current and high load, the heating value of the winding increases and the paint becomes softer.

Classification of hollow cup motors

Slotless Motor

  BLDC coreless motor, commonly known as "brushless hollow cup" in the industry.

Coreless Motor

   DC brushed ironless motor, commonly known as "brush coreless motor" in the industry.

Structural differences between brushed hollow cups and brushless hollow cups

  The hollow cup motor is divided into two types: brushed and brushless. The brushed motor has no iron core in the rotor, and the brushless motor (also known as the ironless hollow cup motor) has no iron core in the stator. It consists of stator poles, rotors, brushes, shells, etc.

The stator poles are made of permanent magnets (permanent magnet steel), including ferrite, AlNiCo, NdFeB and other materials. According to its structure, it can be divided into cylindrical type and tile type.

The rotor is generally made of laminated silicon steel sheets, and the enameled wire is wound between the two slots of the rotor core (three slots have three windings), and each joint is welded to the metal sheet of the commutator.

The brush is a conductive part that connects the power supply and the rotor winding, and has both electrical conductivity and wear resistance. The brushes of the permanent magnet motor use single metal sheets or metal graphite brushes, electrochemical graphite brushes, and use the cooperation of carbon brushes (or metal brushes) and commutators to complete the commutation. The brushless hollow-cup motor does not have this physical structure, and is composed of a permanent magnet rotor, a multi-pole winding stator, and a position sensor. The brushless DC motor is characterized by brushless, which uses semiconductor switching devices (such as Hall elements) to achieve electronic commutation, that is, electronic switching devices are used to replace traditional contact commutators and brushes. It has the advantages of high reliability, no commutation sparks, and low mechanical noise.

According to the change of the rotor position, the position sensor commutates the current of the stator winding along a certain order (that is, detects the position of the rotor magnetic pole relative to the stator winding, and generates a position sensing signal at the determined position, which is processed by the signal conversion circuit. Control the power switch circuit and switch the winding current according to a certain logical relationship. The coil of the brushless hollow cup is fixed, and the permanent magnet rotates in the middle as the rotor. Kegumotor has developed φ12mm, φ15mm,φ16mm, φ17mm, φ20mm, φ22mm, φ24mm. , φ28mm, φ40mm frame size brushless hollow cup motor, the no-load speed of the motor can reach 10000rpm~50000rpm; φ17mm, φ18mm, φ19mm, φ20mm, φ22mm, φ24mm, φ26mm, φ32mm, φ35mm, φ40mm and many other outer diameter sizes, the no-load speed of the motor is 10000rpm~56000rpm, the hollow cup motor is matched with reducers of different speed ratios and different resolutions After the encoder is installed, it can also be used as a torque motor and a position feedback device.

Main features of hollow cup motor:

1. Energy-saving features: The energy conversion efficiency is very high, the maximum efficiency is generally above 70%, and some products can reach more than 90% (the iron core motor is generally 70%).

2. Control characteristics: fast starting and braking, extremely fast response, mechanical time constant less than 28 milliseconds, some products can reach less than 10 milliseconds (iron core motors are generally more than 100 milliseconds); under the high-speed operation state in the recommended operating area , you can easily adjust the speed sensitively.

3. Drag characteristics: The running stability is very reliable, and the fluctuation of the speed is very small. As a micro-motor, the fluctuation of the speed can be easily controlled within 2%.

In addition, the energy density of the hollow cup motor is greatly improved, and its weight and volume are reduced by 1/3-1/2 compared with the iron core motor of the same power.

In order to allow the majority of users to have a better understanding of the hollow brushless motor, the following is the main related discussion on its main application fields.

Application field 1: electronic digital or office computer peripherals

In the application range of hollow brushless motors, office computers, peripheral equipment and electronic digital are the largest application fields, especially in life, such as movie cameras, fax machines, printers, copiers, drives, etc.

Application field 2: industrial control field

With the large-scale production and research and development of hollow brushless motors, its technology has become mature, and the drive system made by him has become more and more widely used in industrial production, and can even be used as industrial electric motors. Mainstream. In order to reduce costs and improve operating efficiency in the industry, major manufacturers need to provide different types of motors to meet the needs of different systems. Therefore, hollow brushless motors have become more and more involved in the industry, and now they have been involved. Printing, metallurgy, automated production lines, textiles and CNC machine tools and other industries.

Application field 3: test equipment field

As we all know, doing experiments also requires a lot of experimental equipment, and the components of these experimental equipment include hollow brushless motors. This is because the equipment used in the laboratory has very high requirements on the motor, not only requires good controllability, but also requires very high precision, such as mixers, centrifuges, etc., because the equipment made of hollow brushless motors can run stably , flexible loading and unloading, and no noise, so its application in the experimental field is more and more extensive.

Application field 4: home appliances and other fields

In our daily life, we will use a lot of household appliances, such as inverter refrigerators and inverter air conditioners. In fact, these common frequency conversion devices mainly benefit from the superior performance of hollow brushless motors. The frequency conversion technology it uses is actually the transition from induction motors to unparalleled motors and controllers for household motors, so it can meet the requirements of high comfort, intelligence, low noise, energy saving and environmental protection.

Application Field 5: Precision Instruments That Must Respond Quickly

Because the hollow cup motor gets rid of the limitation of slow speed regulation of the iron core, the sensitivity of its speed start and speed adjustment is extremely high. In the military field, it can shorten the response time of high-magnification optical drives and improve the hit rate of missiles; in the field of scientific research, it can enable various instruments that collect data to have automatic fast focusing, high-sensitivity recording and analysis capabilities that were not available before.

Application field 6: various aerospace vehicles

Since the hollow cup motor gets rid of the iron core's limitation of weight and design space, it not only occupies a small space, but also can fine-tune the structure according to the requirements of various aerospace vehicles, ranging from military precision drone motors to small The common aerospace model generators in life can be seen with hollow cup motors.

Application area 7: require convenient and precise instruments

Due to the high-efficiency energy conversion rate, small size, light weight and strong endurance of the hollow cup motor, it is very suitable for use in various precision instruments that require convenient use, such as metal detectors, personal navigators, field Engineering instruments for work.