Taizhou Yuanxin Marine Electric Motor Manufacturing Co., Ltd. is a comprehensive motor manufacturing enterprise integrating research, production, sales, and service. Through rapid development in recent years, Yuanxin Motor has established a comprehensive advantage in talent, technology, market, and brand.

Explosion-proof and high-efficiency variable-frequency speed control motors have become an urgent demand for energy-saving products among petrochemical users. The energy-saving aspects of explosion-proof motors include: 1) developing high-efficiency explosion-proof motor products, and 2) extensively producing various types of explosion-proof variable-speed motors, particularly designing speed control motors for fans, pumps, and compressors that have significant energy-saving potential.

The main features of the marine variable frequency explosion-proof motor are:

1. Meets the requirements for explosion-proof motors with increased safety, employing a series of reliable measures to prevent sparks, arcs, and dangerous high temperatures, ensuring safe operation in Zone 2 explosion hazard areas.

2. Brushless excitation is adopted, with a rotating rectifier disc and a static excitation cabinet, ensuring a reliable excitation control system; excitation is accurately applied with no shock during parallel and slip; the excitation system features reliable out-of-step protection and strong re-step capability; the line design is rational, with no heating in the discharge resistor during operation; wide adjustment range for excitation current.

3. Synchronous machines, AC excitation machines, and rotating rectifier disks are coaxial. The rectifier disk is positioned between the main motor and the excitation machine, or placed outside the bearing housing.

4. The shell has an IP protection rating.

5. Utilizing F-grade insulation, temperature rise is evaluated according to B-grade standards.

6. Convert from traditional down water cooling to up water cooling, i.e., position the water cooler above the motor.

7. An anti-damp heating element is installed, fixed within the cover at the bottom of the motor, used for damp-proof heating during shutdown.

8. Select raw materials with ample margins for electrical and mechanical calculations, which can meet the reliability of operation and temperature requirements of explosion-proof motors.

9. Comprehensive measures are in place; an explosion-proof self-balancing current transformer for differential protection is installed in the main junction box; platinum resistance thermometers (Pt100) are embedded in the stator windings for both working and standby; a water leakage detector is set up for the water cooler; sliding bearings with two-end mounts are equipped with on-site temperature display instruments and remote signal terminals.

Marine Variable Frequency Explosion-Proof Electric Motor Equipment Category

Electrical equipment for explosive gas environments is categorized as:

Category I: Electrical Equipment for Underground Coal Mines

II Class: Electrical equipment for explosive gas environments, excluding coal mine.

II Division "d" explosion-proof and intrinsic safety "i" electrical equipment are further classified into IIA, IIB, and IIC categories.

Electrical equipment for environments with combustible dust is categorized into: Type A Dust-tight Equipment; Type B Dust-tight Equipment.

Marine Variable Frequency Explosion-Proof Motor

1. Development of High-Power Electric Motors: The installed capacity of coal mining machines worldwide has exceeded 1200kW, with their driving motor power reaching 600kW. The corresponding scraper conveyors in mining areas have an installed capacity over 1500kW, and their driving motor power is up to 725kW. In China, the driving motor power of coal mining machines is 400kW, and that of scraper conveyors is 315kW.

2. Develop mining motors for 3.3kV, 6kV, and 10kV voltage levels: This is due to the extension of mining area lengths after the widespread adoption of comprehensive mechanized coal mining equipment, which causes voltage drops, and also the use of high-power motors necessitates an increase in voltage levels.

3. Development of Double-Speed Mining Motors: To meet the requirements of low-speed start and high-speed operation for coal mine conveyors, foreign mining scraper conveyors are all driven by double-speed motors. The power range, performance specifications, and performance of the matching control switches of domestic double-speed mining motors are all somewhat behind international standards.

4. Enhance the reliability of mining electrical motors: The operating conditions for explosion-proof motors in mining are poor, with frequent high-load startups, significant load fluctuations, voltage fluctuations, high environmental temperatures, and some degree of corrosiveness, all of which affect the motor's reliability and lifespan.

5. Accelerate the upgrade and replacement of explosion-proof electric motors for mining use.

6. Standardize the specifications for explosion-proof mining motors.

Taizhou Yuanxin Marine Electric Motor Manufacturing Co., Ltd. has passed the ISO9001:2000 international quality system certification, and the total production and sales volume of electric motors has been increasing year by year. For many years, the company has adhered to the corporate tenet of "pursuit" and the business philosophy of "co-developing with customers." By maintaining sincerity, a good reputation, high-quality products, and perfect services, the company has won widespread praise from customers!