Q:

Explain six correct methods of installing DC decelerating motor

• A:

  DC reducer motor is also known as gear reducer motor, which is usually supplied by professional DC reducer manufacturer after integrated assembly. It is applied in all kinds of mechanical industries, and the installation and use of DC decelerating motor is directly related to the operation effect of DC decelerating motor, so the installation of DC decelerating motor should conform to the installation standards and technical specifications. Next, longhui will explain six correct ways to install DC decelerator in detail

  1. Before installation, confirm whether the motor and reducer are in good condition, and strictly check whether the dimensions of all parts connecting the motor and reducer match. Here are the dimensions and matching tolerance of positioning boss, input shaft and reducer groove of the motor.

  2. Unscrew the screw on the dust-proof hole on the outer side of the reducer flange, adjust the PCS system clamping ring to align its side hole with the dust-proof hole, insert the inner hexagon and tighten it, and then remove the motor shaft key.

  3. Connect the motor to the reducer naturally. When connecting, the concentricity of the output shaft of the reducer and the input shaft of the motor must be the same, and the outer flanges of the two must be parallel. If the centrality is inconsistent, the motor shaft will be broken or the reducer gear will be worn. In addition, it is strictly prohibited to hit with a hammer during installation to prevent the bearing or gear from being damaged by excessive axial or radial force. Be sure to tighten the mounting bolt before tightening the force bolt.

  DC reduction motor

  4. Before installation, clean the antirust oil on the motor input shaft, locating boss and the connecting part of reducer with gasoline or sodium zinc water. Its purpose is to ensure the tightness of the connection and the flexibility of operation, and to prevent unnecessary wear.

  5. Before connecting the motor and the reducer, the key slot of the motor shaft shall be perpendicular to the tightening bolt. First screw on the mounting bolt at any diagonal position, but do not screw it down. Then screw on the mounting bolts at the other two diagonal positions and finally screw down the four mounting bolts one by one.

  6. Finally, tighten the tension bolt. All the tightening bolts shall be fixed and inspected by the torque wrench according to the indicated data of the fixed torque.

  The above is the content of "detailed explanation of 6 correct methods for installing DC motor" compiled by Shenzhen longhui small editor. If you want to know more about DC motor, you can click the relevant key words, and the webpage will automatically jump to the relevant content page. I hope this article can help you.

  Reprinted by Shenzhen longhui (www.szlonghui. Com)

Q:

Principle of BLDCM

• A:

  BLDCM is a typical mechatronics product, which is composed of motor body and driver. The motor without brush is the motor without brush and commutator (or collector ring), also known as commutator motor. As early as the 19th century when the motor was born, the practical motor is the brushless form, that is, the AC squirrel cage asynchronous motor, which has been widely used. However, there are many insurmountable defects in asynchronous motor, so the development of motor technology is slow. In the middle of the last century, the transistor was born, so the DC brushless motor using transistor commutation circuit instead of brush and commutator came into being. This new type of BLDCM is called electronic reversing DC motor, which overcomes the defects of the first generation of BLDCM.

  Principle of countless DC motors:

  BLDCM is a typical mechatronics product, which is composed of motor body and driver. The stator winding of motor is mostly made of three-phase symmetrical star connection, which is very similar to three-phase asynchronous motor. In order to detect the polarity of the motor rotor, a position sensor is installed in the motor. The driver is composed of power electronic devices and integrated circuits. Its function is to receive the start, stop and brake signals of the motor to control the start, stop and brake of the motor; to receive the position sensor signals and forward and reverse signals to control the on-off of each power tube of the inverter bridge to generate continuous torque; to receive the speed command and speed feedback signals to control and adjust Rotate speed; provide protection and display, etc.

  DC motor has fast response, large starting torque, and the performance of providing rated torque from zero speed to rated speed. However, the advantages of DC motor are its disadvantages. If DC motor wants to produce the performance of constant torque under rated load, the armature magnetic field and rotor magnetic field must be maintained at 90 ° constantly, which requires carbon brush and commutator. The carbon brush and commutator will produce sparks and carbon powder when the motor is rotating, which will not only cause damage to the components, but also limit the use occasions. There is no carbon brush and commutator in AC motor, which is maintenance free, robust and widely used. However, to achieve the performance equivalent to that of DC motor, complex control technology must be used. Nowadays, with the rapid development of semiconductor, the switching frequency of power components is much faster and the performance of drive motor is improved. The speed of microprocessor is also faster and faster. It can realize the control of AC motor in a rotating two axis rectangular coordinate system, and properly control the current component of AC motor in two axes, so as to achieve similar DC motor control and have the same performance as DC motor.

  In addition, many microprocessors have made the functions necessary to control the motor in the chip, and the volume is becoming smaller and smaller; such as analog-to-digital converter (ADC), pulse width modulator (PWM) And so on. The BLDCM is a kind of application which can control the commutation of AC motor in electronic way, and get the similar characteristics of DC motor without the lack of DC motor mechanism.

  
  

Q:

Micro reduction motor

• A:

  Definition of reduction motor:1: Small vibration, low noise, high energy saving, high quality forged steel material, steel cast iron box, gear surface after high frequency heat treatment.

  2: After precision machining, to ensure the positioning accuracy, all of these constitute the gear reducer motor of the gear transmission assembly, which is equipped with various motors, forming a mechanical and electrical integration, which completely guarantees the quality characteristics of the product.

  3: The product adopts the design idea of series and modularization, and has wide adaptability. This series of products has extremely many motor combinations, installation positions and structural schemes, and can choose any speed and various structural forms according to the actual needs.

  Type of reduction motor:

  1、 Single phase induction motor

  Capacitor type induction motor can be used for continuous operation, with high power and low noise.

  2、 Reversible motor

  It has the function of instant switching forward and reverse, and almost no inaccurate steering switching occurs. Because the balanced winding method is adopted and the simple brake mechanism is built in. It can convert forward and reverse in a short time.

  3、 Electromagnetic brake motor

  It can brake in a short period of time, starting from 2 to 3 revolutions when there is no load, so as to play a safe braking performance.

  4、 Adjustable speed motor

  With the speed controller, the speed can be adjusted in a wide range: 90 ~ 1400rpm. The speed sensor is equipped inside to implement feedback control. Therefore, the power frequency changes, and the specified speed never changes.

  5、 Three phase motor

  The speed of the three-phase motor can be adjusted with the frequency converter, and the speed of the DC motor can be adjusted by changing the power on voltage to realize the speed regulation function.

  Advantages of reduction motor:

  1、 High speed regulation accuracy

  2、 The output speed ratio can vary from 1:3 to 1:1800 due to the wide range of speed change;

  3、 High strength and long service life. 4、 Convenient speed regulation.

  5、 It can operate continuously and in the positive and negative directions, with stable operation, stable performance and low noise.

  6、 Fully sealed, low environmental requirements. 7、 Compact mechanism and small volume.

  8、 Using high quality aluminum alloy die-casting, beautiful appearance, light weight, never rust. 9、 Good adaptability. Wanxin reducer can be combined with reducer to realize low-speed stepless speed change.

  
  

Q:

What is DC motor? The purpose of DC motor

• A:

  Motor is a device that converts electric energy into mechanical energy. It is made of the phenomenon that the electrified coil rotates under the force in the magnetic field, and distributed in each user. According to the different power supply, the motor is divided into DC motor and AC motor. Most of the motors in the power system are AC motor, which can be synchronous motor or asynchronous motor (motor stator magnetic field speed It does not maintain synchronous speed with rotor rotation speed). The motor is mainly composed of stator and rotor. The direction of the force movement of the electrified wire in the magnetic field is related to the current direction and the direction of the magnetic induction wire (magnetic field direction). The working principle of the motor is that the magnetic field acts on the current to make the motor rotate.
  

  Application and Application

  The most widely used of all kinds of motors is AC asynchronous motor (also known as induction motor). The utility model has the advantages of convenient use, reliable operation, low price and firm structure, but the power factor is low and the speed regulation is difficult. Large capacity and low speed power machine is usually used synchronous motor (see synchronous motor).

  Synchronous motor not only has a high power factor, but also its speed is independent of the load size, which only depends on the grid frequency. The work is stable. DC motor is widely used in the situation of wide range speed regulation. But it has commutator, complex structure, expensive price, difficult maintenance, not suitable for harsh environment.