(1) Development of high-power motors: the world's largest installed capacity of coal mining machine has exceeded 1200kw, the drive motor power of 600kW; the maximum installed capacity of the corresponding mining area working face scraper conveyor has exceeded 1500kW, the drive motor power has reached 725kW. the maximum power of the domestic coal mining machine drive motor is 400kW, the maximum power of the scraper conveyor drive motor is 315kW.
 
(2) Development of 3.3kV, 6kV and 10kV mining motors: This is due to the popularisation of comprehensive mechanised coal mining units and the lengthening of the mining area, resulting in an increase in voltage drop, and the use of high-power motors also requires an increase in voltage levels.
 
(3) the development of mining two-speed motor: in order to adapt to the coal mine conveyor low-speed start and high-speed operation of the work needs, foreign mining scraper conveyor are driven by two-speed motor. Domestic mining two-speed motor power range, performance indicators and supporting the performance of the control switch compared with foreign advanced level are a certain gap.
 
(4) improve the reliability of mining motors: mining explosion-proof motor working conditions are poor, the motor frequently large load starting, load changes, voltage fluctuations, high ambient temperature and a certain degree of corrosion, etc., which affect the reliability and life of the motor.
 
(5) Accelerate the renewal of explosion-proof mining motors.
 
(6) Unify the standard of explosion-proof motors for mining.
 
Explosion-proof motors for petrochemical systems
 
(1) The demand for safety-enhancing and non-sparking motors will be on the rise. Users of petrochemical systems in practice; have recognized the need for the development of safety-enhancing and non-sparking motors in China.
 
(2) The reliability of explosion-proof motors has been increasingly concerned by users of petrochemical systems. The development of petrochemical enterprises are increasingly large devices, continuous operation, requiring the system to operate to achieve a long cycle, maintenance-free or less maintenance. Explosion-proof motors are therefore key equipment to ensure these requirements.
 
(3) Explosion-proof and high-efficiency frequency-controlled motors have become an urgent requirement for petrochemical users to develop energy-saving products. Explosion-proof motors have two aspects of energy-saving work: one is the development of high-efficiency explosion-proof motor products, the second is the development of a large number of a variety of explosion-proof speed-controlled motor special products, especially fans, pumps and compressors with great energy-saving potential for the motor design for speed-controlled motors.
 
(4) The development of coastal petrochemical enterprises brought about by the new requirements. China's coastal area will build a number of oil refineries, crude oil are imported, and imported crude oil contains high sulphur, corrosive serious, thus requiring explosion-proof motors to improve corrosion resistance; in addition, imported crude oil are required to be transported by sea, its storage tanks need to match the high head high flow oil pump explosion-proof motor.
 
(5) The great development of the oil industry in the west of China requires the development of explosion-proof motors suitable for the dry and hot desert environment. The market demand for medium and large capacity brushless excitation synchronous motors for hydrogenation plants will grow year by year.