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03-30

2023

Working Principle and Wiring Method of Three Phase Motor with Positive and Reverse Rotation

A three-phase motor is a device that can convert the AC power of a three-phase power source into mechanical energy. It usually consists of a rotor and a stator, which includes a fixed winding and an iron core, and is usually connected to a three-phase power supply. The rotor part is usually rotating and consists of a conductor and an iron core. Its movement converts electrical energy into mechanical energy, thereby realizing its operation.

03-14

2023

How to adjust the speed of permanent magnet synchronous motor

Permanent magnet synchronous motor, the most basic structure of the stator and rotor. The stator is similar to the rotor of asynchronous motor and is made of insulated copper wire. The rotor contains permanent magnets and has a certain number of poles to establish the main magnetic field of the motor.

03-03

2023

What are the brief methods to check the fault of permanent magnet motor?

The four simple methods to check the fault of permanent magnet motor include seeing, listening, smelling and touching. 1、 Look: When the permanent magnet motor is running, observe whether there is any abnormality. The main phenomena are as follows: 1. When the stator winding is short-circuited, you can see that the motor emits smoke. 2. If the motor is seriously overloaded or has phase failure, the speed will slow down and a strong "buzz" will be heard. 3. If the motor operates normally but stops suddenly, you will see that the wire is loose, the fuse is blown, or the parts are jammed to produce sparks. 4. If the motor vibrates violently, the transmission device may get stuck, the motor connection is poor, and the foundation screw is loose.

02-24

2023

What is the current development status of permanent magnet synchronous motor? What are the technical challenges?

Permanent magnet synchronous motor (PMSM) is a kind of high efficiency and high power density motor, which has been widely used in various fields in recent years, such as electric vehicles, wind power generation, etc. The following are the current development status and technical challenges of permanent magnet synchronous motors:

02-16

2023

What are the advantages of high-efficiency motors?

Compared with ordinary motors, the average energy consumption of high-efficiency motors is reduced by about 20%, while that of ultra-high-efficiency motors is more than 30% less than that of ordinary motors. The price of high-efficiency motors is about 15%~30% higher than that of ordinary series motors. However, in general, the investment of high-efficiency motor is higher than that of ordinary motor and can be recovered within 2 years, which can save electricity for enterprises in the whole life cycle.

02-09

2023

Application of permanent magnet synchronous motor in new energy vehicles

Permanent-magnet synchronous motor is mainly composed of rotor, end cover and stator. Permanent magnet means that the motor rotor carries high-quality permanent magnet, and synchronization means that the rotation speed of the rotor is equal to the rotation "magnet" generated by the stator.

02-06

2023

The application of permanent magnet synchronous motor in pump equipment is analyzed

In industrial and agricultural production, the application of pump equipment can be seen everywhere, and many equipment also use pumps. The energy consumption of the pump is only second to that of the power motor equipment, which can be said to be a large energy consumption family. Under the severe situation of energy conservation and emission reduction, reducing pump energy consumption is of great significance for energy conservation and emission reduction.

12-15

2022

How many years can permanent magnet synchronous motor be used? Will magnetism deteriorate after a long time?

Those who have bought and used the permanent magnet synchronous motor should know that the life of the permanent magnet synchronous motor is longer. If the permanent magnet synchronous motor is properly maintained in normal use, the service life of the permanent magnet synchronous motor can even be effectively extended. So, how long is the life of permanent magnet synchronous motor? Let's have a look.

12-01

2022

Which industries are permanent magnet synchronous motors mainly used in

Permanent magnet synchronous motor (PMSM) has the advantages of simple structure, small size, high efficiency and high power factor. The permanent magnet synchronous motor has gained achievements in medium and low voltage motors in metallurgy industry (iron making plant and sintering plant, etc.), ceramics industry (ball mill), rubber industry (internal mixer), oil industry (oil pumping unit), textile industry (double twister, spinning frame), etc., and gradually accumulated design and operation experience.

11-18

2022

Hengda YTDD series permanent magnet servo direct drive motor

YTDD series permanent magnet servo direct drive motor is designed by Hengda for high-performance motion control. This series of motors are widely used in straight wire drawing units, with high power density, obvious energy saving and consumption reduction; Improve the production capacity per unit area; There is no need for deceleration mechanism, direct drive, high reliability, low maintenance cost, intelligent control of the Internet of Things and other advantages. The low speed and large torque characteristics of the permanent magnet direct drive motor meet the needs of the wire drawing machine industry for product transformation and upgrading.

11-11

2022

What are the factors leading to two-phase operation of the motor?

According to the investigation and feedback, motor burning is mostly caused by two-phase operation. The factors leading to two-phase operation of the motor are as follows:1、 In terms of power consumption: due to the concentration of power consumption in daily work, the fuse at the low-voltage outlet of the transformer and the main power supply knife switch fuse in the distribution room are most likely to fuse;

11-04

2022

What are the measurement methods of no-load back EMF of permanent magnet synchronous motor?

Back electromotive force (back electromotive force formula of permanent magnet synchronous motor) Back electromotive force refers to the electromotive force generated by resisting the changing trend of current. Back EMF generally appears in electromagnetic coils, such as relay coils, solenoid valves, contactor coils, motors, inductors, etc. Today we will talk about the measurement methods of no-load back EMF of permanent magnet synchronous motor?

10-27

2022

Something between the motor and the frequency converter

Electric motors are familiar to us and can be seen everywhere in life. In daily production and life, motors are basically involved. Frequency converter is a kind of control equipment, which can change the frequency of voltage, and has a good energy-saving effect. Today I want to introduce the relationship between frequency converter and motor.

10-08

2022

The standard wiring mode of high efficiency motor is

The wiring diagram and method of high efficiency motor are different from those of individual motors, so it is necessary to know something in advance when wiring high efficiency motors. High efficiency motor adopts star connection and triangle connection. Let's take a brief look.

09-27

2022

Permanent magnet synchronous motor is more suitable for load change

Compared with the power frequency motor, the permanent magnet synchronous motor is easy to control, the speed depends on the power frequency, and the operation is stable and reliable, and does not change with the load and voltage fluctuations. In view of the strict synchronization of the speed of permanent magnet synchronous motor, the motor has good dynamic response performance, which is more suitable for frequency conversion control.

09-14

2022

Seven classification methods of three-phase asynchronous motor

Compared with single motor, three-phase asynchronous motor has better operating performance materials. According to the difference of motor rotor structure, three-phase asynchronous motor can be divided into cage type and wound type. Cage rotor induction motor is widely used because of its simple structure, low price, light weight and reliable operation. Its main disadvantage is that it is difficult to speed. The rotor, stator and winding three-phase asynchronous motor is also connected with the external rheostat through the brush with three-phase winding and slip ring. The starting performance and speed of the motor can be improved by adjusting the resistance of the rheostat. Seven classification methods of three-phase asynchronous motor:

08-26

2022

Actual drawing of positive and negative transfer line of three-phase asynchronous motor and detailed explanation of its functions

In order to enable the motor to rotate forward and reverse, two contactors KM1 and KM2 can be used to change the phase sequence of the three-phase power supply of the motor, but the two contactors cannot be pulled in. If they are pulled in at the same time, it will cause a short circuit accident of the power supply. In order to prevent this kind of accident, reliable interlocking shall be adopted in the circuit. The figure below shows the control circuit of motor running in both positive and negative directions with double interlocking of buttons and contactors. Wiring diagram of three-phase asynchronous motor - actual diagram of positive and negative transfer lines:

08-05

2022

Influence of machining technology of motor parts on motor quality

In motor manufacturing, process fluctuation factors often have a great impact on the quality of the motor. On the one hand, it affects the operation performance of the motor, and on the other hand, it affects the assembly quality of the motor. The influence of motor manufacturing process on motor performance index is relatively complex. Often, a motor performance index is related to several process fluctuation factors. Different types of motors have different characteristics, which must be analyzed according to specific conditions.

07-06

2022

How many starting methods are there for permanent magnet synchronous motor? What are the principles for selecting the startup mode?

1. When the grid capacity and load allow full voltage direct starting, full voltage direct starting can be considered. The utility model has the advantages of convenient operation and control, simple maintenance and high economy. It is mainly used to start small power motors. From the point of view of energy conservation, these methods are not suitable for the starting modes of five permanent magnet synchronous motors above 11 kw.

07-01

2022

Technical measures for improving the quality of cast aluminum rotor and reducing additional loss

In the squirrel cage three-phase asynchronous motor, the quality of the cast aluminum rotor directly determines the rotor loss of the motor. Combined with some manufacturing design experience, for the cast copper rotor, the additional loss of the rotor is about 0.5% of the rated power, and the additional loss of the cast aluminum rotor accounts for about 1% to 3% of the rated power. Therefore, under the current development trend of efficiency and energy saving, it is necessary to control the additional loss of the rotor, Some technological measures are taken to reduce the additional loss of the motor.

06-10

2022

Magnetization requirements and design method of permanent magnet motor

Permanent magnet motor is a kind of motor that uses permanent magnet to establish magnetic field. It is also a common motor. After being made, permanent magnet motor can maintain its magnetic field without external energy. So what are the magnetization requirements and design methods of permanent magnet motor? Let's learn together!

05-27

2022

Test method for energy efficiency of permanent magnet synchronous motor

Efficiency is the ratio of output power to input power expressed in the same unit, usually expressed as a percentage. The output power is equal to the input power minus the total loss. If two of the three variables (input, total loss or output) are known, the efficiency can be calculated with the following formula 1 or 2:

05-21

2022

How to improve the working efficiency of permanent magnet motor

For customers who want to buy permanent magnet motor, they pay more attention to these problems. One is the characteristics of permanent magnet motor, and the other is its working efficiency. We have introduced the characteristics of this motor before, so how to improve the working efficiency of permanent magnet motor? Let's learn together! The main factors affecting the working efficiency of permanent magnet motor can be divided into mechanical loss and electromagnetic loss. In order to effectively improve the working efficiency of permanent magnet motor, we must start from the following influencing factors.

04-22

2022

Discussion on insulation treatment technology of motor (Part 2)

When the motor is in use, it starts frequently and has high no-load speed. Sudden load jamming and even locked rotor often occur. Sometimes the instantaneous temperature of the motor used in special occasions can reach more than 200 ℃, and at the same time, it will cause severe vibration. This kind of high centrifugal force, severe vibration and instantaneous thermal shock generated at high temperature and high speed puts forward requirements for the insulation structure of the motor to be resistant to vibration, cold and thermal shock and high temperature, so as to ensure the normal operation of the motor.

04-21

2022

Will other performances of high-efficiency motor decrease while improving efficiency?

For the high-efficiency motor, a fan asked a question: in the process of improving the efficiency of the motor, whether it will have an adverse impact on its power factor and other performance.GB18613. Gb30253 and gb30254 are motor energy efficiency restrictions for different series of products, and they are only special regulations for the efficiency of corresponding products. The technical conditions corresponding to the product will not conflict, but in terms of motor efficiency index, the efficiency index specified in

04-21

2022

How can users identify whether the motor is a high-efficiency motor?

In order to better guide consumers to use high-efficiency motors, China adopts energy efficiency identification management for basic series motors, which should be filed on China's energy efficiency identification network and pasted with corresponding energy efficiency identification on the motor body.

04-15

2022

Discussion on insulation treatment technology of motor (Part I)

Although the coil and other parts of the motor have certain insulation ability when they are made into stator and rotor, for example, the enameled wire is insulated by paint film as conductor; There is slot insulation in the iron core slot. However, the thin layer of paint film on the enamelled wire is very weak and vulnerable as the conductor insulation, and the enamelled wire, slot insulation and slot wedge move with each other. When the motor starts and stops, the insulating material shall withstand the impact of electromagnetic vibration and mechanical vibration, as well as the erosion of moisture,

04-08

2022

Discussion on single phase asynchronous motor

Why do some single-phase motors have two capacitors while others have only one? A motor with two capacitors, one is the starting capacitor and the other is the running capacitor. The starting capacitor is connected to the centrifugal switch. At present, there are three main categories of single-phase asynchronous motors: the first category is the single capacitor phase-shifting type without centrifugal switch, such as electric fans, which are usually used on small motors.

04-01

2022

Cause analysis and preventive measures of phase failure operation of three-phase asynchronous motor

The three-phase asynchronous motor often burns out when it runs out of phase. The main reason is that the reverse sequence magnetic field produces large braking torque after one-phase power failure, which reduces the output torque of the motor. When the external load remains unchanged, the slip rate increases, and the current in the stator winding is much higher than that in normal operation, resulting in increased copper and iron consumption, resulting in the increase of motor temperature and burning out the stator winding.

03-25

2022

Maintenance and management measures of three-phase asynchronous motor in storage

The storage conditions of the motor shall be selected according to its protection grade and the characteristics of the suitable equipment to ensure that the installation size and the quality characteristics of the motor will not deteriorate during the storage of the motor.

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News center

Working Principle and Wiring Method of Three Phase Motor with Positive and Reverse Rotation

How to adjust the speed of permanent magnet synchronous motor

What are the brief methods to check the fault of permanent magnet motor?

What is the current development status of permanent magnet synchronous motor? What are the technical challenges?

What are the advantages of high-efficiency motors?

Application of permanent magnet synchronous motor in new energy vehicles

The application of permanent magnet synchronous motor in pump equipment is analyzed

How many years can permanent magnet synchronous motor be used? Will magnetism deteriorate after a long time?

Which industries are permanent magnet synchronous motors mainly used in

Hengda YTDD series permanent magnet servo direct drive motor

What are the factors leading to two-phase operation of the motor?

What are the measurement methods of no-load back EMF of permanent magnet synchronous motor?

Something between the motor and the frequency converter

The standard wiring mode of high efficiency motor is

Permanent magnet synchronous motor is more suitable for load change

Seven classification methods of three-phase asynchronous motor

Actual drawing of positive and negative transfer line of three-phase asynchronous motor and detailed explanation of its functions

Influence of machining technology of motor parts on motor quality

How many starting methods are there for permanent magnet synchronous motor? What are the principles for selecting the startup mode?

Technical measures for improving the quality of cast aluminum rotor and reducing additional loss

Magnetization requirements and design method of permanent magnet motor

Test method for energy efficiency of permanent magnet synchronous motor

How to improve the working efficiency of permanent magnet motor

Discussion on insulation treatment technology of motor (Part 2)

Will other performances of high-efficiency motor decrease while improving efficiency?

How can users identify whether the motor is a high-efficiency motor?

Discussion on insulation treatment technology of motor (Part I)

Discussion on single phase asynchronous motor

Cause analysis and preventive measures of phase failure operation of three-phase asynchronous motor

Maintenance and management measures of three-phase asynchronous motor in storage

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