LoeSi motor Germany LoeSi model LoeSi price

LoeSi motor is a type of motor that can be used in flammable and explosive environments, producing no electrical sparks during operation. Explosion-proof motors are mainly used in coal mines, oil and natural gas, petrochemical, and chemical industries. In addition, they are widely used in textiles, metallurgy, urban gas, transportation, grain and oil processing, papermaking, pharmaceuticals, and other sectors. As primary power equipment, explosion-proof motors are typically used to drive pumps, fans, compressors, and other transmission machinery.

LoeSi motor structure

The basic structure of the motor consists of a stator, rotor, and other accessories. Function of the stator core: It is part of the motor magnetic circuit, with the stator winding placed on it. Function of the stator winding: It is the circuit part of the electric motor; when three-phase AC power is supplied, it generates a rotating magnetic field. Function of the frame: It fixes the stator core and front/rear end covers to support the rotor, and provides protection and heat dissipation. Function of the rotor: It serves as part of the motor magnetic circuit and holds the rotor winding in the core slots. Function of the rotor winding: It cuts the stator's rotating magnetic field to generate induced electromotive force and current, forming electromagnetic torque that causes the motor to rotate. Features: The structure is relatively complex, so wound-rotor motors are not as widely used as squirrel-cage motors. However, by inserting additional resistors and other components into the rotor winding circuit via slip rings and brushes, the starting, braking, and speed regulation performance of asynchronous motors can be improved. Therefore, they are used in equipment requiring smooth speed regulation within a certain range, such as cranes, elevators, and air compressors. Other accessories of three-phase asynchronous motors: 1, End cover: Support function. 2, Bearing: Connects rotating and stationary parts. 3, Bearing end cap: Protects the bearing. 4, Fan: Cools the motor.

LoeSi motor classification

Motor classification: 1. Hydraulic motor: Conventionally refers to an energy conversion device that outputs rotary motion, converting hydraulic energy provided by a hydraulic pump into mechanical energy. 2. High-speed motor: Gear motors have advantages such as small size, light weight, simple structure, good manufacturability, insensitivity to oil contamination, shock resistance, and low inertia. Disadvantages include large torque pulsation, lower efficiency, and low starting torque (only 60% – 70% of rated torque), as well as poor low-speed stability. 3. Vane motor: A hydraulic motor where vanes in the rotor slots contact the housing (stator ring), causing the rotor to rotate under the action of incoming fluid. Compared with other types of motors, vane motors have advantages such as compact structure, smaller outline dimensions, low noise, and long service life. Their inertia is smaller than that of piston motors, but their contamination resistance is worse than that of gear motors. The speed cannot be too high, generally operating below 200r/min. Due to significant leakage, vane motors are unstable under load changes or at low speeds. 4. Radial piston motor: Has good reverse characteristics, making motor operation absolutely quiet, suitable for servo systems. Can operate bidirectionally as a motor or pump. 5. Axial piston motor: A shaft-distributed cycloidal hydraulic motor with rolling bearing support. It adopts an integrated design of the output shaft and distribution mechanism, inserted-tooth stator and rotor, rolling bearing support at both ends, and special imported rotary seals, allowing the motor to work under higher back pressure. 6. Low-speed hydraulic motor: Simple structure, reliable operation, wide variety of specifications, and low price. Disadvantages include larger volume and weight, and greater torque pulsation. 7. Cycloidal motor: A small, low-speed, high-torque hydraulic motor with internal meshing cycloidal gears. Its structure is simple, it has good low-speed performance, and strong short-term overload capacity. Inside the cycloidal motor, there is a stator and a moving vane. The stator, vane, and drive shaft divide the motor into two chambers, each with an oil port. When one port admits oil, the other discharges it, and the incoming oil pushes the vane to swing. 8. Piston-type pneumatic motor: Composed of connecting rods, crankshaft, pistons, cylinders, body, and distribution valves. Compressed air supplies each cylinder sequentially through the distribution valve, expanding to perform work and pushing the crankshaft to rotate via the connecting rods. Its power mainly comes from gas expansion work.

LoeSi motor excitation method

Motor excitation method refers to the way the magnetic field is generated in rotating electrical machines. DC motor excitation methods are divided into four types: separately excited DC motor, shunt-excited DC motor, series-excited DC motor, and compound-excited DC motor. A DC motor where the field winding has no connection with the armature winding and is powered by another DC source is called a separately excited DC motor. Permanent magnet DC motors can also be regarded as separately excited or self-excited DC motors, generally referred to directly as permanent magnet excitation. In a shunt-excited DC motor, the field winding is connected in parallel with the armature winding. As a shunt generator, the terminal voltage generated by the motor itself powers the field winding; as a shunt motor, the field winding and armature share the same power source, and its performance is identical to that of a separately excited DC motor. In a series-excited DC motor, the field winding is connected in series with the armature winding, and then connected to the DC power source. The excitation current of this DC motor is the armature current. A compound-excited DC motor has two field windings: shunt and series. If the magnetomotive force produced by the series winding is in the same direction as that produced by the shunt winding, it is called cumulative compound excitation. If the two magnetomotive forces are in opposite directions, it is called differential compound excitation. DC motors with different excitation methods have different characteristics. Generally, the main excitation methods for DC motors are shunt, series, and compound, while the main excitation methods for DC generators are separate, shunt, and compound.

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