The use of micro motors has increased significantly in the past two years. Due to the rapid development of end products and the continuous updating of machine models, the functional design, development, and production of motors are also constantly evolving. Therefore, the functions of mid-to-high-end motors in the future need to be measured in conjunction with the development of new products and the actual needs of manufacturers, indicating a huge potential in the international market.
Market Analysis of Micro Motors in Recent Years
Micro motors, also known as miniature motors, are motors with a diameter of less than 160mm or a rated power of less than 750W. Micro motors are commonly used in control systems or transmission machinery loads to perform functions such as detection, analysis, amplification, execution, or conversion of electromechanical signals or energy.
Micro motors come in many categories, and can be broadly classified into 13 major categories, including DC motors, AC motors, self-aligning motors, stepper motors, rotary transformers, shaft angle encoders, AC/DC universal motors, tachogenerators, inductive synchros, linear motors, piezoelectric motors, motor units, and other special motors.
DC brushless motors: These are the fastest-growing product category in the small motor industry in recent years. With the trend towards smaller, lighter, and thinner audio-visual products, quieter home appliances, and increased demand for luxury cars, the demand for DC brushless motors has increased rapidly. They replace brushes and commutators with electronic commutation, offering advantages such as high reliability, high efficiency, long lifespan, and convenient speed adjustment. Countries worldwide are accelerating the development of new products and increasing their market share. Many Japanese companies have already applied DC brushless motors to digital cameras, miniature radios, camcorders, printers, memory drives, mobile phones, as well as automotive air conditioners, washing machines, vacuum cleaners, electric vehicles, and even heart pumps.
Linear motors possess advantages such as simple structure, non-contact motion, low noise, high speed and precision, easy control, convenient maintenance, and high reliability. With continuous innovation in industrial automation, the application fields of linear stepper motors are becoming increasingly broad. Major companies worldwide are vigorously researching and developing new products and expanding application areas; Japanese companies such as Tamagawa, Panasonic, Yamashita, and Servo also offer linear motor products. Currently, linear motors are used in numerous automated devices, such as high-speed punch presses, high-speed cutting machines, satellite antennas, magnetic head drivers, plotters, printers, copiers, scanners, and electric doors.
High-speed hydrodynamic bearing motors: To meet the miniaturization requirements of electronic products, the development of small motors towards higher speeds is a technological trend. For example, the storage density of computer peripherals is rapidly increasing, and their accompanying brushless spindle motors operate at speeds exceeding 8000 rpm, with many small motors even exceeding 20000 rpm. To ensure low noise during high-speed operation and to guarantee smooth operation, minimal vibration, and long lifespan, many Japanese companies have developed and produced high-speed hydrodynamic bearing motors. Hydrodynamic bearings come in two types: air-driven and liquid-driven. Currently, air-driven hydrodynamic bearings are more commonly used, especially suitable for high-speed operation in applications requiring low noise and minimal vibration, such as DVD, HDD, and CD-ROM spindle motors.
Miniature motors are widely used in fields such as small computers, pinball machines, health and wellness products, beauty and massage, toys for the elderly and children, and mobile communications. For example, the demand for miniature motors used in mobile phones, high-end toy cars, and electric toothbrushes has increased rapidly in recent years, especially for small motors with diameters of 3mm to 6mm (hollow and solid types) and button motors with diameters of 8mm to 12mm. Miniature motors are also needed in PCs, home use, health and massage products for the elderly, women's fitness massage, children's smart toys, and small appliances; most of these products are consumer goods.
Miniature motors: The medical field is the most representative application area of microelectromechanical technology. Minimally invasive endoscopic diagnosis and treatment, precision microsurgical instruments, and microrobots all require highly dexterous and flexible miniature motors that are very small in size yet powerful enough. Miniature motors are key actuators and drive components in microelectromechanical systems. As the manufacturing level of miniature motors continues to improve and mature, their production volume and application areas are constantly expanding, and their market potential is enormous, potentially becoming a new economic growth point.
Surface Mount Motors: As electronic products trend towards miniaturization, lightweighting, and thinning, the corresponding small motors also require miniaturization, lightness, and thinness, making the development of surface mount motors an inevitable trend. The principle of surface mount motors is not significantly different from that of traditional DC motors. Several Japanese companies already produce surface mount motors, which are widely used in floppy disk drives, hard disk drives, portable music players, tape recorders, video recorders, camcorders, digital cameras, mobile communications, and miniature medical devices.
Micro motors integrate high-tech industries from multiple disciplines such as stepper motors, microelectronics, power electronics, computers, automatic control, precision machinery, and new materials. In particular, the application of electronic technology and new materials technology has promoted the advancement of micro motor technology.
The following is a forward-looking analysis of the micro motor market.
(1) Motors for home appliances. Micro-motors and control technology are core technologies for modern home appliances. There are many types and a large quantity of motors for home appliances. Although it is a relatively mature market, new models emphasize multi-functionality, energy saving, low noise, and low vibration, which is in line with the goal of high-quality design, production, and testing of home appliances in the future. The market will grow significantly in the future.
(2) Communication and computer peripheral products. The demand for high-precision small motors used in these products is increasing in variety and quantity, with an astonishing growth rate. Combined with electronic control, they have high added value and great potential for future development.
(3) Micro-motors for automobiles. With automobile sales rising steadily, the number of electrical components used is increasing daily. Automatic quantitative electronic fuel injection systems are replacing traditional carburetors, and ABS brakes are being replaced by electric motors. A car now uses thirty to forty motors, and even more than eighty. Motorcycle starter motors are replacing foot pedals, the diversification of portable rechargeable power tools, and the environmentally friendly electric vehicles of the future all contribute to the high demand and anticipation for high-performance DC motors.
(4) Micro motors for power tools. The transformation of industrial products into household hand tools has led to the popularity of high-end power tools and household appliances. The more stringent the performance requirements for series-wound motors, the more promising the development becomes.
(5) Other special-purpose motors. The number of motors used in satellite receiver steering, lawnmowers, vehicles for the disabled, and CNC servo motors has been increasing year by year, while the number of brushless motors used in computers and high-end appliances has increased the most, reaching tens of millions of units.
(6) Industrial motors. Driven by international economic conditions, the increasing number of emerging industrial countries, equipment upgrades, and increased production of new machines ensure a promising future for industrial motors.
The U.S. military micromotor manufacturing industry has a long history, and its research and product levels are among the world's leading. For a long time, the vast majority of micromotors used in Western military equipment and electronic devices have been supplied by a few major U.S. companies. U.S. military standards for micromotors have achieved international standard status.
The UK has a strong foundation in the electrical engineering industry, and its military micro-motor industry is also highly advanced. Its products are supplied not only to the UK military but also to NATO countries. France, Japan, and Germany started their military micro-motor industries later, and their product technology is lower than that of the US, with fewer product varieties and specifications. France and Germany rely on their own technological strengths to develop some new products, forming specialized products with unique characteristics. For example, France's position sensing products and West Germany's brushless motors and stepper motors have reached or are close to the US level. The Soviet Union's micro-motor industry has a long history of development and has formed an independent research and production system. It adopts a closed, centralized production model, undertaken by a few large military-industrial backbone enterprises, and places particular emphasis on product quality and reliability. However, its product performance and new product development lag behind the US to some extent.
