Specializing in the design and manufacture of automotive motor armatures and stators.

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Basic knowledge of fuel pump armature

Release Time:

2022-09-22

   Fuel pump armature It is a key component in the process of electromechanical energy conversion in a motor. For a generator, it is the component that generates electromotive force. Below is some basic knowledge about fuel pump armatures.

  The fuel pump armature is the part of the motor that has coils, and the coils move relative to the magnetic field. In a generator, it generates induced electromotive force in the coils, and the coils rotate under force to generate electricity. In a motor, the energized coils are subjected to Ampere force in the magnetic field, causing them to rotate in the magnetic field. In fact, in the mid-19th century, the term was used for inductors, i.e., the support of magnets. Since everyone will use fuel pump armatures, you need to know that components of an alternator or related equipment can be represented mechanically or electrically. Although these two sets of terms are distinctly separate, they are often used interchangeably, or a combination of mechanical and electrical terms may be included. Confusion may arise when using composite machines such as brushless alternators, or when conversing among people accustomed to using differently configured machines. In fact, in most fuel pumps, the magnetic field is rotating and is part of the rotor, while it is stationary and part of the stator.

  The fuel pump armature is generated by excitation. In both generating and motor modes, it carries current and produces what is called armature flux. The effect of armature flux on the main magnetic field is called armature reaction. Well, at this point, the reaction is that the demagnetizing effect can be overcome by adding extra ampere-turns to the main magnetic field windings. The fuel pump armature has common magnetic poles to reduce cross-magnetization effects. In amplifier rotating amplifiers, armature reaction is essential. In addition, it is also necessary to know that the reduction of armature reaction force is the impact on the main pole flux distribution of the generator. Of course, this is mainly because the armature is wound, so whenever current flows through the wire, the armature forms a magnetic field. At right angles, this is called cross-magnetization of the fuel pump armature. The effect of the armature field is to distort the generator magnetic field and move the neutral plane. Or in the neutral plane, the armature windings move parallel to the magnetic field lines, which is why the axis located in this plane is called the magnetic neutral axis (MNA). This effect is called armature reaction and is proportional to the current flowing in the armature windings.


Fuel pump armature

09-13

2022

Methods for winding the armature of a DC brushless automotive motor

The method for winding the armature winding of a DC brushless car motor is to leave a section of the cable end free and tie it tightly to the shaft. Hold the car armature with one hand, and wind the coil inductance clockwise with the other hand. Taking a five-slot armature as an example, the first coil is 1-5, the second coil is 2-6, then 3-7..., and so on. The sides of many components are on the next layer. The 5-9 components have one side on the next layer and the other side on the top layer. The sides of many components are on the top layer. In order to ensure the insulation between the top layer and the next layer components, it is advisable to place 0.1-0.15mm thick insulating paper pads in between. When the coil inductance in the slot reaches a certain level, a crossbar is needed to make it reach the bottom of the slot. When winding the coil inductance, the wire should be tightened first. Whether in the slot or the wire connection part, it is necessary to prevent the occurrence of crossed turns to prevent excessive space occupation and short circuit between turns due to partial stress of the wire. After all the windings are wound, the wire ends of the same winding component are bundled together, then the insulation layer of the wire connector is removed, different color waterproof sleeves are used, and they are embedded in the corresponding commutator segments. The important role of the armature in a DC brushless motor: DC motor,

08-22

2022

Design rules for automotive armatures

Automotive armature manufacturers indicate that single-layer windings are not suitable for large-capacity motors, and small-capacity motors should not be double-layered. The magnetic flux density of the motor core should not be too high or too low. When the frequency and thickness of the silicon steel sheet core material are constant, the iron loss depends on the magnetic flux density. If the magnetic flux density is too high, the iron loss increases, and the motor efficiency decreases. The increased heat from the iron core increases the motor temperature, and the increased excitation power increases the motor power factor, so the magnetic flux density of the core should not be too high. Try to avoid excessive saturation of the magnetization curve. If the magnetic density is too low, it will increase the amount of motor material used, increasing the cost. The rotor teeth are narrow, the magnetic density is high, the slot entry wire is large, that is, the automotive armature slots are large. Automotive armature manufacturers indicate that due to poor air conduction, there are many gaps in the slots, affecting the coils and easily damaging the heat dissipation of the insulation material, accelerating the increase in motor temperature. The slot fill factor of the motor slots cannot be too high or too low. Usually, the slot fill factor for low-speed motors is 75% to 85%, which can effectively prevent the enamelled wire from loosening in the slots. The design of the motor rotor slot shape should use parallel trapezoidal recesses as much as possible, and the edges of the recesses should not have sharp corners. Try to use a circular bottom recess, because the circular slot is filled with aluminum, which is easy to injection mold and the stator chip is easy to insert. The coil current density should not be...

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