Do you use alternating current or direct current for the stator excitation winding of a DC motor?

The excitation mode of the excitation winding is basically divided into other excitation type and self-excitation type; Other-excited DC motors.

The excitation winding is powered by other power sources, which are not connected to the armature winding of the motor and use direct current; Self-excited DC motors use the current emitted by themselves to excite the excitation windings and armature windings from the same power source. It can be roughly divided into three types: parallel excitation, series excitation and compound excitation. Uses DC power supply.

1. The stator (excitation) winding of the DC motor uses direct current. Because the excitation method of the excitation winding is divided into other excitation type and self-excitation type. The excitation winding of the separately excited DC motor is powered by other power sources, which is not connected to the armature winding of the motor and uses direct current.

2. Direct current machine refers to a rotating machine that can convert direct current energy into mechanical energy (DC motor) or mechanical energy into direct current energy (DC generator). It is a motor that can convert direct current energy and mechanical energy to each other. When it is used as a motor, it is a DC motor, which converts electrical energy into mechanical energy; When the generator is running, it is a direct current generator, which converts mechanical energy into electrical energy.

3. The excitation winding (also called the excitation winding) is a coil winding that can generate a magnetic field. Generally, in motors and generators, there are series excitation and parallel excitation. The excitation winding used in the generator can replace the permanent magnet, which can produce a strong magnetic flux density that cannot be produced by the permanent magnet, and can be easily adjusted, so as to achieve high-power power generation.

4. The excitation winding has a single wave winding and a complex wave winding. The characteristic of a single-wave winding is that all the coils under the same polarity are connected in series according to a certain law to form a parallel branch. So there are only two parallel branches in the entire armature winding.

In the commutator pitch type of the wave winding coil, p is the number of pole pairs; k is the number of commutation pieces; a is such that ys is equal to the positive integer of the integer, which is equal to the parallel branch logarithm of the wave winding. The single-wave winding a=1, and the complex wave winding of a=2 is called the double-wave winding, which can be regarded as a complex wave winding formed by two single-wave windings in parallel, so there are 4 parallel branches; a>2 can be used by analogy, but they are rarely used. In terms of the principle of parallel circuit connection, only two sets of brushes are needed, that is, one group of positive brushes and one group of negative brushes.

Summary. There are four excitation methods for DC motors:1

Self-excitation: directly connect the windings of the motor to the power supply and establish the magnetic field by itself, which is suitable for low-power, low-speed DC motors. 2.

Magnetic pole excitation: A strong magnet is used as the excitation source of the motor, and the magnetic field of the motor is established by magnetic field induction, which is suitable for low-power DC motors. 3.

Serial excitation: The excitation winding of the motor is connected in series on the armature circuit of the motor to realize the operation function of excitation and motor, and has a stable excitation field and output torque. 4.

And excitation: The excitation winding of the motor and the armature circuit of the motor are connected to the external power supply respectively to realize the independent control of the excitation magnetic field and output torque, which can adapt to a wider range of application needs.

There are four excitation methods for DC motors:1Self-excitation:

The windings of the motor are directly connected to the power supply and the magnetic field is established by itself, which is suitable for low-power, low-speed DC motors. 2.Pole Excitation:

A strong magnet is used as the excitation source of the motor, and the magnetic field of the motor is established by magnetic field induction, which is suitable for low-power DC motors. 3.Serial excitation:

The excitation winding of the motor is connected to the armature circuit of the motor to realize the operation function of the excitation and the motor, and has a stable excitation field and output torque. 4.And excitation:

The fiber excitation winding of the motor and the armature circuit of the motor are connected to the external power supply respectively to realize independent control of the excitation magnetic field and output torque, which can be adapted to a wider range of application needs.

DC motor excitation mode.

The application of permanent magnet DC motor in automobiles?

There are many applications of permanent magnet DC motors in automobiles, mainly as auxiliary power systems or power systems to drive electric vehicles. Here are a few common ways to apply:1

Brake assist: When the car brakes, it assists the operation of the brake by controlling the torque output of the PMDC motor, making the car braking more safe and reliable. 2.

Air conditioning assistance: PMDC motors can play an auxiliary role in the air conditioning compressor drive system, improving the efficiency and performance of the air conditioning system. 3.

Throttle control: Controlling the output torque and speed of the PMDC motor can realize the control of the throttle of the car and improve the driving performance and fuel economy of the car. 4.

Electric vehicle power system: PMDC motor is one of the power systems of electric vehicle propulsion, which is provided by the battery to provide DC power, and PMDC motor drives the vehicle by controlling the speed and torque. This application reduces environmental pollution and improves energy efficiency.

In short, permanent magnet DC motors are widely used in automobiles and play an important role in improving the functionality and safety of automobiles.

The armature of the <> motor is arranged on the stator, and the excitation winding is arranged on the rotor. Excitation is a machine that provides stator power to the stator of a generator or synchronous motor, and provides a working magnetic field for the generator or other electrical equipment (electrical equipment that works using the principle of electromagnetic induction). Sometimes a device that provides rotor power to the rotor of a generator is also called excitation.

The excitation winding is an important part of the DC motor. It is a set of coils or windings in a DC motor that is used to create a magnetic field to excite the rotor of the motor. The excitation winding is powered by an external power supply or a battery, which generates a stable magnetic field and dust build-up, so that the motor can operate normally.

In DC motors, the excitation winding can be divided into two types:

Separately excited DC motor: The excitation winding and the armature winding of the motor are supplied separately and are supplied through different power sources. By adjusting the current of the excitation winding, the excitation magnetic field strength of the motor can be controlled, so as to realize the control of the motor speed and torque.

Self-excited DC motor: The excitation winding and the armature winding of the motor are powered by sharing a power supply. The excitation winding can be further divided into three forms: series excitation, parallel excitation and compound excitation, and the excitation control of the motor can be realized according to the different connection methods and power supply configurations of the excitation winding.

The role of the excitation winding is to generate a magnetic field in the DC electric escort aircraft, so that the motor can operate and generate torque. The stability and modulation of the excitation field is critical to the performance and control of the DC motor.

Holis is mainly engaged in the R&D, production and sales of intelligent equipment manufacturing, providing high-end equipment and intelligent chemical factory solutions for electric drive, electronic control, electrical equipment and precision electronics industries of new energy vehicles.

The excitation winding is an important part of the DC motor, which is mainly used to generate the magnetic field so that the motor can work normally. In a ruler positive DC motor, the excitation winding is usually powered by a DC power supply, and a magnetic field is generated by winding it around the pole core of the motor. According to the position of the excitation winding and the different power supply methods, DC motors can be divided into separate excitation, series excitation, parallel excitation and compound excitation.

These different excitation methods will affect the performance and shouting characteristics of the motor, so the influence of the excitation winding needs to be considered in the design and selection of the motor.

The function of the excitation winding in the DC motor is to pass through the DC electric and generate the excitation potential difference; The function of the armature winding is to generate induced electromotive force and passing current, so that the motor can realize the electrical energy conversion.

Qinyin Dongshou, we are glad to serve you The generator excitation winding is a single-phase generator, and the number of phases of the excitation winding can be single-phase or three-phase, depending on the design and application needs of the generator. In some small household or commercial single-phase generators, the excitation winding is usually single-phase; In large-scale industrial three-phase power generation front machines, it is usually three-phase. In a single-phase generator, there is only one power input and one output circuit.

Its excitation winding only needs to use one coil to complete the excitation process, so it is relatively simple. Whereas, in a three-phase generator, there are three power inputs and one output circuit. Due to the special tremor relationship between the three-phase electricity, the design of the excitation winding also needs to consider the phase and position of the three independent coils, and the balance of current and voltage between the three coils needs to be ensured.

As a result, the excitation windings of a three-phase generator are more complex than those of a single-phase generator.

Summary. Glad to be able to your questions.

Only synchronous generators and synchronous motors have excitation windings and armature windings. The general AC asynchronous motor does not have an excitation winding. The asynchronous motor is divided into two categories: squirrel cage type and winding type, the stator winding structure is the same, the rotor of the squirrel cage type is a squirrel cage strip, and the winding rotor is a coil (the rotor impedance can be changed by external equipment to achieve variable speed).

The so-called "armature winding" is the "main power circuit" of the motor. Which of the rotor coils and stator coils has more power is the "armature", needless to say, the vast majority of stator coils are "armature windings".

How to distinguish between excitation windings and armature windings. Stator winding and armature winding.

Glad to be able to your questions. Only synchronous generators and synchronous motors have excitation windings and armature windings. The general AC asynchronous motor does not have an excitation winding.

The asynchronous motor is divided into two categories: squirrel cage type and winding type, the stator winding structure is the same, the rotor of the squirrel cage type is a squirrel cage strip, and the winding rotor is a coil (the rotor impedance can be changed by external equipment to achieve variable speed). The so-called "armature winding" is the "main power circuit" of the motor. Which of the rotor coils and stator coils has more power is the "armature", needless to say, the vast majority of stator coils are "armature windings".

Okay, no rush.

Synchronous generators and motors are suitable for timing windings and armature windings.

Pro, the excitation methods of DC motors are usually as follows:1Independent Excitation:

Independent excitation means that the excitation circuit of the DC motor is independent of the power circuit of the motor, and the excitation current is provided through the DC power supply. Independent excitation is suitable for occasions where the excitation current of the motor needs to be accurately controlled, such as the occasion that the torque, speed and other parameters of the motor need to be accurately controlled. 2.

Self-excitation: Self-excitation means that the excitation circuit of the DC motor is connected to the power circuit of the motor to provide excitation current through the electric potential generated by the motor itself. Self-excitation is suitable for applications where simple control of the motor is required, such as where the motor needs to be controlled in forward and reverse rotation.

3.Serial excitation: Serial excitation refers to the series connection between the excitation circuit of the DC motor and the electric source circuit of the motor, and at the same time, the magnetic field is generated through the armature front shot and the excitation coil.

Serial excitation is suitable for applications that require high-speed operation of motors, such as high-speed equipment such as electric locomotives and airplanes. 4.And excitation:

Parallel excitation means that the excitation circuit of the DC motor is connected in parallel with the power circuit of the motor, and the electric potential in the armature is enhanced by a magnetic field. And excitation is suitable for occasions that require high-power operation of motors, such as those that need to be used in heavy industrial equipment such as steel and cement. The above are the common excitation methods of DC motors, and different excitation methods are suitable for different working occasions, and they need to be selected according to specific work needs.

The rotor material of the motor that everyone sees in the world, whether it is a parallel magnetic motor, a string magnetic motor or an asynchronous motor, the ferromagnetic material used in the rotor is a silicon steel sheet (silicon steel sheet), so it can be inferred that Qiao Sun Bi, the rotor core material of the electric Kaicong machine should be the best silicon steel sheet material.

Stator core. Purpose: Part of the magnetic circuit of the motor and place the stator windings on it.

Structure: The stator core is generally made of millimeter-thick silicon steel sheets with an insulating layer on the surface, punched and stacked, and there are evenly distributed grooves in the inner circle of the core to embed the stator winding.

A motor is a device that converts electrical energy into scattered mechanical energy. It uses an energized coil (that is, the stator winding) to generate a rotating magnetic field and acts on the rotor (such as a squirrel cage closed aluminum frame) to form a magnetoelectric dynamic rotational torque. The motor is divided into DC motor and AC motor according to the different power sources, and most of the motors in the power system are AC motors, which can be synchronous motors or asynchronous motors (the magnetic field speed of the stator of the motor and the rotation speed of the rotor are not guessed vertically to maintain the synchronous speed).

The motor is mainly composed of a stator and a rotor, and the direction of the energized wire in the magnetic field is related to the direction of the current and the direction of the magnetic inductance line (magnetic field direction). The working principle of the motor is the effect of the magnetic field on the current force, which makes the motor rotate.

Excitation with glass ribbon, epoxy resin shaping, DMD high-temperature paper lining, baking paint soaking, and then drying and installation.