(3) Classification: brushless hollow cup motor is the direction of future development

Hollow cup motor according to its commutation mode can be divided into brush hollow cup motor and brushless hollow cup motor two kinds. Brush hollow cup motor: the use of mechanical brush commutator, generally by the shell, soft magnetic material internal stator, permanent magnet stator, hollow cup rotor armature composition; The other is a brushless hollow cup motor, using electronic commutation, by the shell, soft magnetic materials, insulating materials and hollow cup armature composed of the stator and permanent magnetic steel rotor. When the hollow cup brush motor is energized, the winding has current through, generating torque, the rotor begins to rotate, if the rotor turns to a specific Angle, the brush uses the mechanical commutator to change the direction of the current, so that the output torque direction is unchanged, the rotor continues to rotate. Because the hollow cup brush motor adopts brush commutation, there is a certain relative friction during the operation of the motor, which will produce noise spark and reduce the service life of the motor. Brushless hollow cup motor: through the control of electronic components on and off to make different winding access to the circuit, to achieve the effect of commutation, this electronic commutation mode makes the hollow cup brushless motor with high efficiency, small torque fluctuation, high service life, compact structure, easy maintenance, easy maintenance and so on.

Brushless hollow cup motor has better performance and longer life, which is the future development direction. In terms of life, the life of the brushless hollow cup motor is limited by the bearing, the life of the brushed hollow cup motor is limited by the brush, the brush life is much shorter than the bearing, and the hollow cup motor is usually scrapped with the scrap of the brush. Brushless hollow cup motor commutation will have electrical spark, electrical spark will have electromagnetic interference, brushless hollow cup motor commutation through the Hall element, almost no electromagnetic interference. In addition, the brushless hollow cup motor has the advantages of fast speed and high efficiency. Although the price of the brushed hollow cup motor is lower and the control method is simpler, with the humanoid robot dexterous hand’s higher pursuit of the performance and life of the hollow cup motor, it is expected that the brushless hollow cup motor will have greater development space.

Second, industry analysis: Humanoid robots bring new opportunities, cost reduction demand to boost domestic enterprises to break the original pattern

(1) Downstream applications: Excellent performance brings a wide range of downstream applications

Hollow cup motor has outstanding performance advantages, so that it has a wide range of downstream applications. The hollow cup motor avoids a variety of technical drawbacks of the iron core motor, and its outstanding characteristics are concentrated in the main performance of the motor, so that it has a wide range of applications. Especially with the rapid development of industrial technology, higher expectations and requirements are constantly put forward for the servo characteristics of the motor, so that the hollow cup motor has an irreplaceable position in many applications. According to QY research’s Global Coreless DC Motors Market Research Report 2022, without reless humanoid robot dexterity, It is estimated that the global hollow cup motor market size will be about 5 billion yuan in 2022.

PCI-6071

The application of hollow cup motor, from the military, high-tech fields into the large industrial and civilian fields, has been rapid development for more than 10 years, especially in the industrial developed countries, has involved most industries and many products: the need for rapid response servo system. Such as the rapid adjustment of the flight direction of the missile, the follow-up control of the high-rate optical drive, fast automatic focusing, highly sensitive recording and detection equipment, industrial robots, bionic prosthesis, etc., the hollow cup motor can meet its technical requirements well. Products that require smooth and durable dragging of the driving elements. Such as all kinds of portable instruments, personal equipment, field operation equipment, electric vehicles, toy cars, electric toothbrushes, etc., the same set of power supply, the power supply time can be extended by more than double. All kinds of aircraft, including aviation, aerospace, model aircraft, etc. The hollow cup motor has the advantages of light weight, small size and low energy consumption, which can greatly reduce the weight of the aircraft. A variety of civil electrical appliances, industrial products. The hollow cup motor is used as the actuator.

Medical equipment: When transporting patients, powerful and efficient portable ventilators are needed. The brushless hollow cup DC motor reduces the size of the motor-blower assembly while ensuring higher pressure and flow, making it more responsive and quieter, reliable and efficient, enabling efficient battery-powered drive of the ventilator blower at night, during hospital transfers, emergency vehicles or intercontinental flights. Dentists need handheld dental mobile phones that are lightweight, powerful, and efficient to successfully perform dental procedures. Brushless hollow cup DC motors are ideal for dental treatment. The hollow cup motor has a compact design that provides maximum torque and power in a smaller package, enabling precise and focused work during treatment while eliminating any unpleasant noise caused to dentists and patients.

Industrial automation: electric gripper is an important device in the automation industry, in today’s rapid development of automation, electric gripper can help people complete things with higher complex coefficient. The motor is required to have the advantages of high reliability, high accuracy and fast reaction speed. The hollow cup motor is well adapted to the needs of the electric gripper. Based on the drive gear box design, simulation analysis, noise analysis and other technical means, Zhaowei proposed the solution of the electric gripper drive system. By optimizing the drive control mode and increasing the output power of the gripping force, the problem of complexity and loud noise during the use of the electric gripper was effectively solved. Make it widely used. As a kind of high-precision equipment specially used in automotive electronics, smart home, industrial automation, medical equipment and other industries, its role is to carry out the ultimate fine dispensing for products. At present, in the process of fine dispensing of some dispensing machines on the market, due to the poor accuracy and torque of the drive system, in the process of long-term use, the dispensing machine is easy to spot the unstable amount of glue, resulting in dispensing errors. By using a brushless high-performance motor with a precision gear box, the motor drives the screw to rotate in the stator cavity to realize the quantitative conveying function, which can form a stable glue spitting effect and improve the performance of the glue machine. It has the characteristics of simple structure, easy operation and long service life.

Aerospace: Drones, also known as UAVs (unmanned aerial vehicles), are versatile and can be used in a variety of applications such as defense and surveillance, agriculture, and logistics. Drones need to be extremely flexible for navigation and must be extremely durable, as they are often required to operate in harsh environments. These UAV applications require effective propulsion for improved maneuverability (i.e. extended battery life), reduced noise and thermal characteristics to ensure undetected, and precise control of camera heads and other auxiliary applications. The brushless hollow cup motor meets the drone’s requirements for responsiveness, reliability and motion accuracy, delivering optimal torque and efficiency in a compact, lightweight housing that is fully capable of operating under harsh environmental conditions. The cockpit flight control element, also known as the cabin control element, helps the pilot control the direction of flight of the aircraft. These devices transmit pilot commands to the control surface of a fixed-wing or rotorcraft and provide active force feedback to the pilot. From this, the pilot can see and feel the movement of the flight control elements, similar to the resistance on the steering wheel of the vehicle during a turn. Main power feedback devices include a side joystick unit (SSU), rudder pedal/rudder brake pedal Unit (RBPU), throttle control Assembly (TCA)/ Throttle control cable (TCQ), and autopilot/autothrottle and intelligent actuators. The key characteristics of the cockpit flight control element require that the small motor must be reliable and accurate, and space and weight constraints require compact, lightweight and high power density (SWaP) solutions. The hollow cup brushless motor not only has the performance of color, but also has a small size and weight, and is highly adapted to the requirements of the cockpit flight control components for the motor.