In the past 2013, industrial vehicles once again ushered in a good year, with sales of 328,000 units in the whole year, an increase of 14% compared with 2012, surpassing the highest historical sales of industrial vehicles in 2011, a new high. In the world's total sales, the Chinese market still holds a quarter of the market and continues to rank among the world's largest sales markets. With the development of the domestic economy, the development of the electric forklift market faces enormous opportunities and challenges. In terms of market competition, the number of electric forklift companies is increasing, and the market is facing an asymmetry between supply and demand. The electric forklift industry will usher in a major reshuffle, but there is still much room for development in the accessories market in the field of electric forklifts. The core parts technology of electric forklifts will become the core competitiveness.
At present, the output of international electric forklifts is on the rise. The use of AC motor and variable frequency speed regulation has made the battery forklift a qualitative leap. The voltage of the AC motor has a higher and higher development trend, which makes the forklift have less heat and higher efficiency in the work, and completely overcomes the shortcomings of the DC motor generating heat, low efficiency and frequent maintenance. The birth of the permanent magnet motor compensates for all the defects of the AC motor and the DC motor. As an integral part of electric forklifts, the current forklift main engine manufacturers mainly use DC and AC motors. With the birth of the double-effect permanent magnet motor, the motor industry has taken a new step. The innovation of forklift accessories has also revolutionized industrial vehicles.
Many people know that China is a large country of rare earth production, and rare earth resources rank first in the world. NdFeB in rare earths has excellent magnetic field. Domestic high-quality NdFeB permanent magnets can be mass-produced. The center of magnetic materials in the world has been The transfer to China has provided favorable conditions for the development of the rare earth permanent magnet motor industry.

Advantages and scope of application of rare earth permanent magnet motors:
Since the rare earth permanent magnet material has excellent magnetic properties, it does not require additional energy after magnetization to establish a strong permanent magnetic field, and the rare earth permanent magnet motor made by replacing the electric excitation field of the conventional motor is not only efficient, but also The structure is simple, the operation is reliable, and the volume is small and the weight is light. Compared with the electric excitation motor, the principle of the rare earth permanent magnet motor has the advantages of simple structure, reliable operation, small volume, light weight, low loss and high efficiency, and the shape and size of the motor can be flexible and diverse, so the application range is extremely wide. It covers almost all areas of aerospace, defense, industry and agriculture, and daily life. In particular, the National Development and Reform Commission put forward in the "Implementation Opinions on the Ten Key Energy-Saving Projects": to promote high-efficiency and energy-saving rare earth permanent magnet motors; and to promote advanced motor speed control technologies such as variable frequency speed regulation and permanent magnet motor speed control to improve fans and pump motors. The system adjusts the mode and gradually eliminates mechanical throttle adjustment methods such as gates and valves.

Working principle and classification of rare earth permanent magnet motor:
The application of rare earth permanent magnet motors in the automotive industry has become increasingly mature, and the application of industrial vehicles has not yet begun. Generally, it can be divided into rare earth permanent magnet DC brush motor and rare earth permanent magnet brushless motor. The main difference between the two is the position where the permanent magnet is placed. The permanent magnet type brushed brush motor places the permanent magnet on the non-rotating stator and places the coil on the rotor, so the current is transmitted to the rotor via the carbon brush and the commutator. The advantage of this structure is that the motor is in the maximum torque output condition at any time by mechanical contact. The disadvantages are the carbon brush, the wear between the commutator segments and the heat dissipation of the rotor coil, etc., which limits the motor under high speed and high current conditions. application.
The rare earth permanent magnet brushless motor places the permanent magnet on the rotor and uses other sensing components to achieve the functions like carbon brush and commutator. The advantage is that the heat dissipation is easy and there is no carbon brush wear, so the speed and power are eliminated. limits. In this article, we will focus on rare earth permanent magnet brushless motors.

Advantages of rare earth permanent magnet brushless motor:
Rare earth permanent magnet brushless motor is a typical mechatronics mechanism, the structure of AC motor (simple), the performance of DC motor, its maximum motor efficiency can reach 95%~97%, which is 15% higher than traditional DC motor. ～20%, due to the high efficiency area of ​​rare earth motors, the comprehensive electromechanical efficiency in forklifts is 40%-50% higher than that of traditional DC motors, and can save 40%-50% in operation. Battery capacity can also be used. A reduction of more than 40% is of great benefit to reducing the cost of the forklift. The test of Shanghai Jinqiao Zhonggong Electric Forklift Co., Ltd. on the electric pallet truck shows that the rare earth motor saves 50.5% of electricity compared with the original motor, which can save 1.5 billion yuan in operating electricity cost and 500 million yuan in forklift manufacturing cost for the whole year.

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WuHu Hangtian Automobile Connecting Rod Co., Ltd. was founded in 1991,which located at Wuhu Mechanical Industry Zone in Anhui Province, and covers an area of 33300 square meters .We are one of the domestic largest auto engine con- rod manufacturing factory integrating research & development, forging, machining and producing. With a near 25 years development, we already own a strong team with 200 employees in which more than 20 people are engineers and technicians. Nowdays, ZXT has grown into a large-scale enterprises with 4 product lines, and its annual outputs has over 1,000,000 pcs.

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