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How to synchronize variable frequency motors and electromagnetic speed regulating motors? What should we do when installing a device that uses variable frequency drive and synchronizes with another device that uses electromagnetic speed regulation and has a speed generator on the motor head during on-site installation? What needs to be added to convert the AC speed signal emitted by the tachometer generator into the standard DC speed given signal recognized by the frequency converter? Here, Xinte Motor editor can help solve the synchronization problem between variable frequency motors and electromagnetic speed regulating motors:   Installing an encoder expansion board on the frequency converter can solve the problem smoothly by sending the electromagnetic speed measurement signal to the frequency converter. Next, Xinte Electric's editor will take you to learn more about electromagnetic speed control motors and variable frequency speed control motors.   The difference between electromagnetic speed regulation motor and variable frequency speed regulation motor:   1. Electromagnetic speed regulating motor   Electromagnetic speed regulating motor, consisting of a single speed or multi speed squirrel type asynchronous motor and an electromagnetic slip clutch.   Electromagnetic speed regulating asynchronous motor (slip motor), also known as slip motor, is a constant torque AC continuously variable speed motor. Due to its wide speed range, smooth speed adjustment, high starting torque, low control power, negative speed feedback, and high mechanical characteristics and hardness in automatic adjustment systems, it has been widely used in printing machines and staplers, wireless binding, high-frequency drying linkage machines, and chain furnace grate control. 2. Variable frequency speed regulating motor   Variable frequency speed regulating motor is a general term for electric motors driven by frequency converters.   Variable frequency speed regulating motor, abbreviated as variable frequency motor, is a general term for electric motors driven by frequency converters. In fact, the motor designed for the frequency converter is a dedicated motor for frequency conversion. The motor can achieve different speeds and torques under the drive of the frequency converter to adapt to changes in load requirements. Variable frequency motors have evolved from traditional squirrel cage motors, replacing traditional motor fans with independent fans and improving the insulation performance of motor windings. In situations with low requirements such as operating at rated frequency with low power and frequency, ordinary squirrel cage motors can be used instead.   The speed regulation and control of electric motors are one of the fundamental technologies for various types of machinery in industry and agriculture, as well as office and household electrical equipment. With the amazing development of power electronics technology and microelectronics technology, the use of "dedicated variable frequency induction motor+frequency converter" AC speed regulation method is leading a revolution in the field of speed regulation that replaces traditional speed regulation methods with its good performance and economy.   Xinte Motor is equipped with a variable frequency speed regulation energy-saving device and a low vibration and noise reduction design. Its energy efficiency level meets the efficiency requirements of GB18613 standard, with high energy efficiency and low noise, energy saving and consumption reduction, effectively helping customers save equipment operating costs. The company has industry-leading automated CNC production equipment, a modern type testing center in China, a sound quality assurance system, procurement control system, and modern management system. The comprehensive performance of its products has reached the level of similar products at home and abroad.

Three phase asynchronous motors are widely used in enterprise production due to their excellent advantages. To ensure the good operation of asynchronous motors, relevant personnel need to be familiar with the structural parameters and operating knowledge of the motor equipment, master the common faults and handling methods of the motor, and timely discover and solve the hidden dangers of motor accidents. The rated value of three-phase asynchronous motors is engraved on the nameplate of each motor. Here, Xinte Motor editor will give a brief introduction to the structure and nameplate parameters of three-phase asynchronous motors, generally including the following:   1. Model: In order to meet the needs of different purposes and working environments, electric motors are made into different series, each series is represented by various models. For example, Y 132 M-4:   Y → Three phase asynchronous motor, among which the product name code for three-phase asynchronous motor is: YR for wound asynchronous motor; YB is an explosion-proof asynchronous motor; YQ is a high starting torque asynchronous motor.   132 → Center height of machine base (mm);   M → Machine base length code;   4 → Number of magnetic poles;   2. Connection method: This is the connection method for the specified three-phase winding. There are six lead wires labeled U1, V1, W1, U2, V2, and W2 in the junction box of a typical squirrel cage motor. Among them, U1 U2 are the two ends of the first phase winding; V1 and V2 are the two ends of the second phase winding; W1 and W2 are the two ends of the third phase winding.   If U1, V1, and W1 are the starting ends (heads) of the three-phase winding, then U2, V2, and W2 are the corresponding ending ends (tails). These six lead out terminals need to be correctly connected to each other before connecting to the power supply. There are two connection methods: star (Y) connection and triangle connection. Usually, three-phase asynchronous motors with a power of less than 3kW are connected in a star shape; Connect those above 4kW to form a triangle. 3. Rated power PN: refers to the mechanical power at the output end of an electric motor when operating at the rated conditions specified by the manufacturer, generally measured in kilowatts (kW). For three-phase asynchronous motors, their rated power is PN=UNIN η NcosN, where η N and cosN are the efficiency and power factor under rated conditions, respectively.   4. Rated voltage UN: refers to the line voltage applied to the stator winding during the rated operation of the motor, measured in volts (V).   It is generally stipulated that the working voltage of an electric motor should not be higher or lower than 5% of the rated value. When the working voltage is higher than the rated value, the magnetic flux will increase, which will greatly increase the excitation current. If the current is greater than the rated current, the winding will heat up. Meanwhile, due to the increase in magnetic flux, the iron loss (proportional to the square of the magnetic flux) also increases, causing the stator core to overheat; When the working voltage is lower than the rated value, it causes a decrease in output torque, a decrease in speed, an increase in current, and overheating of the winding, which is also detrimental to the operation of the motor.   The Y series small and medium-sized asynchronous motors produced in our country have a rated power of over 3kW, a rated voltage of 380V, and winding connections in a triangular shape. For rated power of 3 kW and below, the rated voltage is 380/220V, and the winding is Y/connected (i.e. when the power line voltage is 380 V, the motor winding is star connected); When the power line voltage is 220 V, the motor winding is connected in a triangular shape.   5. Rated current IN: refers to the line current of the stator winding of an electric motor at rated voltage and rated output power, measured in amperes (A).   When the motor is unloaded, the rotor speed approaches the synchronous speed of the rotating magnetic field, and the relative speed between the two is very small, so the rotor current is approximately zero. At this time, the stator current is almost entirely the excitation current that establishes the rotating magnetic field. When the output power increases, both the rotor current and stator current increase accordingly.   6. Rated frequency fN: The frequency of China's power grid is 50 Hertz (Hz), so except for exported products, the rated frequency of asynchronous motors used domestically is 50 Hertz.   7. Rated speed nN: refers to the speed of the rotor of an electric motor at rated voltage and rated frequency, with rated power output at the output terminal, measured in revolutions per minute (r/min). Due to different requirements for speed in production machinery, asynchronous motors with different numbers of magnetic poles need to be produced, resulting in different speed levels. The commonly used is a four pole asynchronous motor (n0=l500 r/min).   8. Rated efficiency η N: refers to the efficiency of an electric motor operating at rated conditions, which is the ratio of rated output power to rated input power. Namely, η N=× 100%=× 100%.   9. Rated power factor cosN: Because the motor is an inductive load, the stator phase current lags behind the phase voltage by one angle, cos is the power factor of the asynchronous motor.     The power factor of three-phase asynchronous motors is relatively low, about 0 at rated load  7～0. Between 9, it is even lower under light and empty loads, with only 0  2～0. 3. Therefore, it is necessary to correctly select the capacity of the electric motor, prevent the large horse from pulling the small car, and strive to shorten the idle time.   10. Insulation level: It is classified according to the maximum allowable temperature of the insulation material used in the motor winding during use. The so-called maximum temperature refers to the maximum allowable temperature of the hottest points in the insulation structure of the electric motor.   11. Working mode: Reflecting the operation of asynchronous motors, it can be divided into three basic modes: continuous operation, short-term operation, and intermittent operation.   Xinte Electric is a strong research and production manufacturer of water pump motors. The company is located in Lingang Economic Zone, Meixi Town, Anji County, Huzhou City, Zhejiang Province, covering an area of 46000 square meters. The company has industry-leading automated CNC production equipment, a modern domestic type testing center, a complete quality assurance system, procurement control system, and modern management system. The comprehensive performance of the products has reached the level of similar products at home and abroad.

Three phase asynchronous motor is a type of AC motor, also known as induction motor. It has a series of advantages such as simple structure, easy manufacturing, durability, convenient maintenance, low cost, and low price. Therefore, it is widely used in industry, agriculture, national defense, aerospace, scientific research, construction, transportation, and people's daily lives. But its power factor is relatively low, which limits its application to some extent. Here, the Xinte Motor editor would like to express their views on the electrical braking and application scenarios of three-phase asynchronous motors:   Three phase asynchronous motor electrical braking commonly uses reverse braking, energy consumption braking, regenerative braking, and power generation braking.   Electrical braking is the process of generating an electromagnetic torque opposite to the direction of rotation during the stopping of an electric motor, which serves as a braking force to stop the motor from rotating. The methods of electrical braking include reverse braking, energy consumption braking, capacitor braking, and regenerative braking (also known as feedback braking, feedback braking, and power generation feedback braking). Mainly used in machine tools, cranes, and some commonly used automatic control systems.   Due to the fact that the rotor and stator of a three-phase asynchronous motor rotate in the same direction but at different speeds, resulting in a slip rate, it is called a three-phase asynchronous motor.   Three phase asynchronous motors are made into large motors. It is generally used in large industrial equipment with triple phase power. A three-phase asynchronous motor with symmetrical 3-phase winding is fed with symmetrical 3-phase current, generating a rotating magnetic field. The magnetic field lines cut the rotor winding, and according to the principle of electromagnetic induction, e and i are generated in the rotor winding. The rotor winding is subjected to electromagnetic force in the magnetic field, which generates electromagnetic torque, causing the rotor to rotate. The rotor outputs mechanical energy and drives the mechanical load to rotate.   In an AC motor, when the stator winding passes through an AC current, an armature electromotive force is established, which has a significant impact on the energy conversion and operational performance of the motor.   So when three-phase AC winding is connected to three-phase AC, pulsating magnetic electromotive force is generated, which can be decomposed into two rotating magnetic electromotive forces with equal amplitude and opposite speed, thus establishing forward and reverse magnetic fields in the air gap. These two rotating magnetic fields cut the rotor conductor and generate induced electromotive force and induced current in the rotor conductor, respectively.   Three phase asynchronous motors Y2 (IP55) series, Y (IP44) series, 0.75KW~315KW, with enclosed enclosures to prevent dust and water droplets from entering. Y2 is F-class insulation, Y is B-class insulation, used for various mechanical equipment without special requirements, such as metal cutting machines, water pumps, blowers, transportation machinery, etc.   Xinte Electric is a production-oriented enterprise that integrates motor research and development, manufacturing, and sales. Equipped with frequency conversion speed regulation energy-saving device, low vibration and noise reduction design, the energy efficiency level meets the efficiency requirements of GB18613 standard, with high energy efficiency and low noise, energy saving and consumption reduction, effectively helping customers save equipment operating costs. We have introduced automated high-precision production equipment such as CNC lathes, wire cutting machines, CNC grinders, and CNC milling machines. We also have our own testing center and dynamic balance testing equipment to ensure precise positioning and high product accuracy.

There are many reasons why a motor can burn out. You need to check whether the voltage of your fan motor is reasonable, whether the fan blades on the motor are damaged, whether the bearings on the motor rotor are aged or lack lubricating grease, whether the wire contact is good, and so on, all of which can cause the motor to burn out. Here, Xinte Electric's editor will provide a simple answer to the cause of fan motor burnout:   1、 Phase loss operation:   1. Fault phenomenon:   The motor cannot start, even if it can start without load, the speed slowly increases and there is a buzzing sound; The motor emits smoke and heat, accompanied by a burning smell.   2. Inspection results:   Remove the motor end cover and you can see that 1/3 or 2/3 of the pole phase windings at the end of the winding are either burnt or have turned dark brown.   3. Causes and solutions of faults:   (1) Poor contact or mechanical damage to the fuse circuit of the motor power supply circuit, resulting in the melting of a certain phase fuse.   (2) The specifications of the three-phase fuses in the motor power supply circuit are different, and the fuses with smaller capacity are blown. The fuse should be replaced with the same specification according to the power of the motor.   (3) The contacts of switches (isolating switches, rubber cover switches, etc.) and contactors in the electric motor power supply circuit have poor contact (burnt out or loose). Trim and adjust the moving and stationary contacts to ensure good contact. (4) A certain phase of the line is missing. Identify the broken wire and connect it securely.   (5) Poor contact caused by virtual soldering between the winding connections of the electric motor. Carefully check the connection wires of the motor winding and weld them firmly.   2、 Overload operation:   1. Fault phenomenon:   The high-pressure fan operates in a high-pressure zone for a long time, resulting in an increase in motor shaft power and motor current exceeding the rated value; The temperature rise of the motor exceeds the rated temperature rise, or foreign objects are sucked into the high-pressure fan, causing the motor to operate at overload, or the motor bearings have no lubricating grease or the sand frame is damaged; Friction between the stator and rotor iron cores, commonly known as sweeping.   2. Inspection result: All three sets of windings of the motor have been burned out;   3. Causes and solutions of faults:   (1) When the high-pressure fan operates in a high-pressure zone for a long time, it should be appropriately depressurized or replaced with a motor of appropriate power.   (2) Foreign objects are sucked into the high-pressure fan, causing the motor to overload and burn out the motor winding. Check the front end of the high-pressure fan and take measures to handle foreign objects to make it rotate flexibly.   (3) If the power supply voltage is too high or too low, a three-phase power supply voltage stabilization compensation cabinet needs to be installed. The motor is severely damp or corroded by corrosive gases for a long time, resulting in a decrease in insulation resistance.   (4) The lack of oil in the bearings, dry grinding, or mechanical misalignment of the rotor can cause the motor rotor to sweep, resulting in the motor current exceeding the rated value. Firstly, the wear of the bearings should be carefully checked, and if they are not qualified, new bearings should be replaced; Secondly, clean the bearings and inject an appropriate amount of lubricating grease. Then check the motor end cover. If the center hole of the end cover is worn and causes the rotor to be misaligned, the end cover should be treated or replaced.   Xinte Electric is a production-oriented enterprise that integrates motor research and development, manufacturing, and sales. The company has industry-leading automated CNC production equipment, a modern type testing center in China, a sound quality assurance system, procurement control system, and modern management system. The comprehensive performance of its products has reached the level of similar products at home and abroad. The production process strictly follows the ISO9001 quality management system standard, strictly adheres to European and American standards, and has its own type testing center. Strict quality inspection ensures product quality and power performance. The products have passed CCC, CQC, and China Energy Conservation Certification, and the quality is reliable.

 A single-phase motor refers to an asynchronous motor that operates on a 220V single-phase AC power supply. Due to the convenience and cost-effectiveness of the 220V power supply, which is also the standard voltage for household electricity, single-phase motors are widely used in production and closely related to daily life. As living standards continue to improve, the demand for single-phase motors in household appliances has also been increasing. Here, Xint Motor provides an analysis of the applications and maintenance methods of single-phase motors:   A single-phase motor generally refers to a low-power single-phase asynchronous motor powered by a single-phase AC supply (AC 220V). This type of motor typically has two-phase windings on the stator and a standard squirrel-cage rotor. The distribution of the two-phase windings on the stator and the power supply conditions can generate different starting and operating characteristics.   In terms of production applications, there are mini water pumps, pulp grinders, threshers, crushers, woodworking machinery, medical devices, and more. In daily life, there are electric fans, hair dryers, exhaust fans, washing machines, refrigerators, and other devices. While the variety is extensive, the power output is relatively small.   Maintenance method:   Common Motor Maintenance and Repair Center Motor Maintenance Process: Clean the stator and rotor → Replace carbon brushes or other components → Vacuum pressure impregnation with F-class insulation → Drying → Dynamic balancing. Notes:   1. The operating environment should be kept dry at all times, the motor surface should be maintained clean, and the air intake should not be obstructed by dust, fibers, or other debris.   2. When the thermal protection of the motor continuously trips, it is necessary to determine whether the fault originates from the motor, overload, or excessively low setting of the protective device. Operation can only be resumed after the fault is resolved.   3. Ensure proper lubrication of the motor during operation. Typically, the motor should have its grease replenished or replaced after approximately 5,000 hours of operation. If overheating of the bearings or deterioration of the lubricant is detected during operation, promptly replace the grease. When changing the grease, remove the old lubricant and clean the oil grooves in the bearings and bearing covers with gasoline. Then, fill the cavity between the inner and outer rings of the bearing with ZL-3 lithium-based grease to 1/2 (for 2 poles) or 2/3 (for 4, 6, and 8 poles) of the space.   4. When the bearing reaches the end of its service life, the vibration and noise of the motor operation will increase. The bearing should be replaced when the radial clearance reaches a certain value.   5. When disassembling the motor, the rotor can be removed from either the shaft extension end or the non-extension end. If there is no need to remove the fan, it is more convenient to take out the rotor from the non-shaft extension end. During the extraction of the rotor from the stator, care must be taken to avoid damaging the stator windings or insulation devices.   6. When replacing the winding, it is necessary to record the original winding's form, dimensions, number of turns, wire gauge, etc. If these data are lost, they should be obtained from the manufacturer. Arbitrarily altering the original designed winding often leads to the deterioration of one or several motor performance parameters, or even renders the motor unusable.   Xint Electric Motors are equipped with frequency conversion speed regulation and energy-saving devices, featuring low vibration and noise reduction design. Their energy efficiency level complies with the efficiency requirements specified in GB18613 standards, offering high efficiency, low noise, energy conservation, and reduced consumption, effectively helping customers save on equipment operation costs. The company has introduced automated high-precision production equipment such as CNC lathes, wire cutting machines, CNC grinders, and CNC milling machines. With its own testing and inspection center, it possesses dynamic balancing and other testing equipment, ensuring precise positioning and guaranteeing high product accuracy.