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Maxon 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 the main power equipment, explosion-proof motors are typically used to drive pumps, fans, compressors, and other transmission machinery.

Maxon motor cooling method

Motor cooling methods include: 1) Cooling: During energy conversion, the motor always converts a small portion of losses into heat, which must be continuously dissipated through the motor housing and surrounding medium; this heat dissipation process is called cooling. 2) Cooling medium: A gaseous or liquid medium that transfers heat. 3) Primary cooling medium: A gaseous or liquid medium with a temperature lower than that of a specific motor component, which contacts that component and carries away the heat it releases. 4) Secondary cooling medium: A gaseous or liquid medium with a temperature lower than that of the primary cooling medium, which removes the heat released by the primary cooling medium via the motor's outer surface or cooler. 5) Final cooling medium: The final medium to which heat is transferred. 6) Ambient cooling medium: The gaseous or liquid medium in the motor's surrounding environment. 7) Remote medium: A medium located far from the motor, which absorbs heat from the motor and discharges the cooling medium to a remote location via inlet and outlet pipes or channels. 8) Cooler: A device that transfers heat from one cooling medium to another while keeping the two media separated.

Maxon motor advantages

The motor consists of the motor body and the driver, representing a typical mechatronic product. The stator windings of the motor are mostly configured in a three-phase symmetrical star connection, very similar to three-phase asynchronous motors. Permanent magnets that have been magnetized are attached to the motor rotor. To detect the polarity of the motor rotor, position sensors are installed inside the motor. The driver is composed of power electronic devices and integrated circuits, with functions including: receiving start, stop, and brake signals from the motor to control its starting, stopping, and braking; receiving signals from position sensors and forward/reverse rotation signals to control the switching of power transistors in the inverter bridge, generating continuous torque; receiving speed commands and speed feedback signals to control and adjust rotational speed; and providing protection and display functions, among others.

Maxon motor structure

The motor structure consists of two main parts: the stator and the rotor. The stationary part of a DC motor during operation is called the stator. Its main function is to generate a magnetic field, and it comprises the frame, main poles, commutating poles, end covers, bearings, and brush assembly. The rotating part during operation is called the rotor. Its main function is to generate electromagnetic torque and induced electromotive force, serving as the hub for energy conversion in DC motors, hence it is also commonly referred to as the armature. It consists of the shaft, armature core, armature winding, commutator, and fan. The main pole's function is to generate the air gap magnetic field. The main pole consists of two parts: the main pole core and the field winding. The core is generally made by stacking and riveting silicon steel laminations with a thickness of 0.5mm to 1.5mm. It is divided into the pole body and the pole shoe. The part covered by the field winding is called the pole body, and the widened lower part is called the pole shoe. The pole shoe is wider than the pole body, which not only adjusts the distribution of the magnetic field in the air gap but also facilitates the fixing of the field winding. The field winding is wound with insulated copper wire and fitted onto the main pole core. The entire main pole is fixed to the frame with screws. The function of the commutating pole is to improve commutation and reduce commutation sparks that may occur between the brushes and the commutator during motor operation. It is generally installed between two adjacent main poles and consists of the commutating pole core and the commutating pole winding. The commutating pole winding is wound with insulated wire and fitted onto the commutating pole core. The number of commutating poles equals the number of main poles. The outer shell of the motor stator is called the frame. The frame serves two purposes: first, it fixes the main poles, commutating poles, and end covers, providing support and fixation for the entire motor; second, the frame itself is part of the magnetic circuit, forming the magnetic path between the poles. The part through which magnetic flux passes is called the yoke. To ensure sufficient mechanical strength and good magnetic conductivity, the frame is generally made of cast steel or welded steel plates. The brush assembly is used to introduce or extract DC voltage and current. The brush assembly consists of brushes, brush holders, brush rods, and brush rod seats. The brushes are placed in the brush holders and pressed by springs to ensure good sliding contact between the brushes and the commutator. The brush holders are fixed to the brush rods, which are mounted on a ring-shaped brush rod seat. They must be insulated from each other. The brush rod seat is mounted on the end cover or bearing inner cover. Its circumferential position can be adjusted and fixed once properly aligned.

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