Yangzhou Yaxin Marine Electric Motor Manufacturing Co., Ltd. is an integrated manufacturer of electric motors, encompassing R&D, production, sales, and services. With rapid development over recent years, Yaxin Motors has established a comprehensive advantage in areas such as talent, technology, market, and brand.

Explosion-proof motors, also known as positive pressure motors, are a type of positive pressure electrical equipment. Their structural features are:

1. Equipped with a complete ventilation system; there are no structural dead corners within the motor that could affect ventilation.

2. The housing and pipes are made of non-flammable materials and possess sufficient mechanical strength.

3. Maintain a sufficient positive pressure inside the shell and main conduit relative to the external atmosphere.

4. Motors must be equipped with safety protection devices (such as timers and monitors) to ensure adequate air exchange volume, and must also have an automatic protection or alarm system for low pressure within the casing.

5. Quick-opening doors or lids on the housing must be equipped with interlocked devices connected to the power supply. China does not have a unified series of positive-pressure type motor products.

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

1. The housing boasts high-sealing properties to minimize or prevent dust from entering the housing interior, and even if it does enter, the amount is not sufficient to pose a fire ignition hazard.

2. The control housing surface temperature must not exceed the specified temperature group. Already used on mechanical equipment in national food reserve warehouses. The national standard for dust explosion-proof electrical equipment is GB 12476.1-90 "Dust Explosion-Proof Electrical Equipment for Explosive Dust Environments."

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

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

2. Brushless excitation is adopted, with a rotating rectifier disk and a static excitation cabinet set up, ensuring a reliable excitation control system. The excitation is accurately applied with no shock due to the correct phase shift. The system's out-of-step protection is reliable and has strong reclosing capability. The circuit design is rational, with the discharge resistor not generating heat during operation. The excitation current has a wide adjustable range.

3. Synchronous machines, AC excitation machines, and rotating rectifiers are coaxial. The rectifier disk is located 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. Transition from traditional down-water cooling to up-water cooling, placing the water cooler above the motor.

7. A moisture-proof heating element is installed and fixed inside the cover at the bottom of the motor, used for moisture prevention and heating during shutdown.

8. Select raw materials with ample margin for electrical and mechanical calculations, ensuring reliability in operation and meeting the temperature requirements for explosion-proof motors.

9. Comprehensive measures are in place; an intrinsically safe, self-balancing current transformer for differential protection is installed in the main junction box; platinum resistance thermometers, type 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.

Explosion-proof and variable-frequency speed control motors have become an urgent energy-saving product demand from petrochemical users. Energy-saving in explosion-proof motors involves two aspects: first, the development of explosion-proof motor products, and second, the extensive development of various variable-speed explosion-proof motor products, particularly designing speed control motors for fans, pumps, and compressors that possess significant energy-saving potential.

Taizhou Yuanxin Marine Electric Motor Manufacturing Co., Ltd. is committed to providing exceptional service and ensuring customer satisfaction, holding integrity as the cornerstone of our company's survival. We strive for customer satisfaction in all aspects and work tirelessly for the long-term, healthy development of our enterprise!