China BLDC Motor,PMDC Motor,Laser Machine Manufacturer,AC & DC Motor Manufacturer

Brushless motor development in our country in a relatively short time, as technology has become more mature and perfect got swift and violent development. In the model, medical equipment, household appliances, electric cars and other fields are widely used, and in Shenzhen, Changsha, Shanghai to form a shape of industry chain. Shenzhen Albert motor \ Changsha Kodak and a number of professional manufacturers, technically continue to promote the development of the industry.Brushless motor background information : in recent years, brushless motor has become the model in the field of rapid development is a kind of power. As a result of output and price reason, the past few years brushless motor used in high-grade aviation model, now due to mechanical processing technology's rapid development, brushless motor production cost decrease, it is entered into the model field at all levels, from the electric remote control cars to electric remote control boat to electric model aircraft, ubiquitous.For the brushless motor misunderstanding: many people have seen the model using the brushless motor, they are using battery power, so a lot of people in the knowledge has been a misunderstanding, think the brushless motor is a DC motor, actually otherwise, brushless motor belongs to the AC motor, three-phase AC permanent magnet motor an input model, brushless motor 3 wire current alternating current, but this is not 50HZ alternating current electric sine wave, but from the brushless motor controller ( commonly known as brushless electric modulation ) modulation of three phase alternating rectangular wave, the frequency ratio 50HZ is much higher, and with the motor speed change.

Gear motor motor and reducer and a short, gear reducer as the name suggests, is to use different teeth number group n gear, the motor shaft speed is reduced to you need speed, gear motor can completely and rotary encoder using.Motor speed refers to the speed reducer and motor ( motor) integrated body. This integrated body usually can also be referred to as the gear motor or a gear motor. Usually consists of professional reducer factory was integrated after assembling complete sets of supply. Reducer motor is widely used in iron and steel industry, machinery industry and so on. The use of gear motor has the advantages of simplified design, save space. Gear motor, gear motor with 1 Overview: international technical requirements for manufacturing, with high content of science and technology. In 2, space saving, reliable and durable, high overload capacity, power can reach more than 95KW. In 3, low energy consumption, excellent performance, high efficiency of more than 95% reducer. In 4, small vibration, low noise, energy saving and high, high-quality Duan Gang material, steel cast iron box, gear surface after high frequency heat treatment. 5, through sophisticated processing, to ensure the positioning precision, all these constitute a gear transmission assembly of gear reducer motor equipped with all kinds of motor, the formation of electromechanical integration, fully guaranteed product quality characteristics using. In 6, the product uses serialization, modular design, have extensive adaptability, this series of products are very much a motor combination, the mounting position and the structure of the program, according to the actual need to select any speed and various structural forms.

In 1 he excited DC motor The excitation winding and the armature winding without connection, and by other DC power to excitation winding power supply DC motor called a separately excited DC motor, wiring diagram ( a ) shown below. Figure M said motor, if the generator, is expressed by G. Permanent magnet DC motor can also be seen as a separately excited DC motor.2 Shunt DC motorShunt excited DC motor excitation winding and the armature winding are connected in parallel, the wiring diagram ( b ) shown below. As the shunt generator, is the motor itself out of the terminal voltage excitation winding power supply; as the shunt motor, the excitation winding and the armature to share the same power, from the performance perspective and separately excited DC motor.The 3 Series DC motorThe series excitation DC motor excitation winding and armature winding in series, and then is connected to the DC power supply, wiring diagram ( c ) shown below. The DC motor excitation current is the armature current.4 compound wound DC motorCompound wound DC motor and shunt and series two excitation winding, wiring diagram ( d ) shown below. If the series excitation winding generates a magnetomotive force and the shunt winding magnetomotive force produced by same direction called cumulative compound. If the two magnetomotive force in the opposite direction, is called differential compound. The different excitation type DC motor with different characteristics. The general situation of the main excitation type DC motor is shunt, series excitation type and compound type, DC generator excitation mode is the main excitation type, and shunt type and compound type.

A )" brushless"" brush " basic idea: the present electric bicycle is widely used DC permanent magnet motor, DC permanent magnet motor according to whether the commutation can be divided into motor with brush and brushless motor two, a brush motor is a DC motor mainstream products, the majority of electric bicycle motor it is a brush motor. Brushless motor is a special motor, which adopts the built-in sensors and electronic commutator for electronic commutation, brushless motor is mainly to eliminate brush wear, as well as the brush contact noise.Two) brush motor faults not hinder it in electric bicycles in the wide application of the elements: the brush abrasion and the motor noise is" brush" and" brushless" of the two major drawbacks, but despite the two disadvantages, why most of the domestic brand manufacturers still use the brush motor plan, do they not aware of this problem? The reason is that:A ) brush wear does not constitute a major problem in electric bicycle is a kind of discrete work vehicles, a battery is usually the longest time of discharge ( riding time ) for general 2-3 hours, users use every day trade average time is about 1-2 hours, and now, widely used in electric bicycle disc brake rotor motor with plane commutator and longer working life quality brush, usually within 1500 hours or more, so, according to every user average day cycling 1.5 hours, a group of brush using time is 1000 days. As can be seen, a group of qualified brush service time is close to three years, while a group of Replacement Brush cost only 5 yuan, an annual average of less than 2 yuan! Moreover, the use of electric bicycles for 3 years and really it is necessary to do some comprehensive vehicle inspection and maintenance, replacement of some wear parts, promote trade motor ten years maintenance-free this exaggerated point of view, there are misleading to consumers.B ) motor noise is normal the author visited in the market, a brushless motor electric vehicle sales promotion, demonstration of brushless motor under no load condition the mute characteristics, which proves the brushless motor than the brush motor is much better, in fact, the purchase of electric vehicles is not to buy air-conditioning equipment, consumer may not be as it is without noise and the decision to purchase or not. In fact, the use of a brushless motor of electric vehicle users will know, brushless motor in idling or low load ( such as a flat calm case) motor sound is indeed very small, however, when running to the overloaded state such as uphill, against the wind, it will often send far than a brush motor more" great" sound, appear even uncomfortable electromagnetic vibration, and this kind of sounds in quiet shop the sales process is not there. In fact, the vehicle when the motor runs some voices is normal, after all, it is a kind of outdoor use to transport, the provisions of the national standard for noise less than 62 decibels, the vast majority of domestic motor can be controlled below 55 dB decibel value, of qualified products. Brushless motor sales promotion member guide consumers on the pursuit of" mute", like sales air conditioners as to promote electric vehicles, but also misleading the consumer suspicion, air conditioning noise is too big effect on sleep, and the vehicle noise will not affect the use of!

AC servo motor and working principle of single phase asynchronous motor is similar, but the former rotor resistance than the latter is much larger, so the servo motor and single asynchronous motor is compared, have three marked characteristics: 1, big starting torque due to the rotor resistance is large, and the ordinary asynchronous motor torque characteristic curve is compared, have apparent difference between. It can make the critical slip S0 > 1, so that not only the torque characteristic ( mechanical properties ) closer to linear, but also has high starting torque. Therefore, when a control voltage of stator, rotor rotating immediately, namely with quick starting, high sensitivity characteristics. In 2, running a wide range 3, without rotation of the phenomenon of normal operation of the servo motor, as long as the loss of control voltage, the motor stop immediately. When the servo motor out of control voltage, it is single phase operation state, due to the rotor resistance, stator in two opposite directions of rotation of the rotating magnetic field and rotor effects produced by the two torque characteristic ( T1S1, T2S2 curve ) and synthetic torque characteristic ( TS curve ) AC servo motor output power is 0.1-100W. When the power frequency of 50Hz, voltage 36V, 110V, 220, 380V; when the power frequency of 400Hz, voltage 20V, 26V, 36V, 115V etc.. AC servo motor running smooth, low noise. But the control characteristics is nonlinear, and the rotor resistance, loss is big, efficiency is low, so with the same capacity of DC servo motor, large volume, heavy weight, they are only applicable to small 0.5-100W power control system.

The 1 servo system ( servomechanism ) is to make the object position, azimuth, state controlled output quantity can follow the input goal ( or value ) of any changes in the automatic control system. Servo mainly depends on the pulse to locate, basically can understand so, servo motor receives a 1 pulse, will rotate 1 pulse corresponding angle, so as to realize the displacement, because, the servo motor has a pulse function, so the servo motor rotates an angle, has a corresponding number of pulses, such, and the servo motor to accept the pulse forming echo, or closed loop, thus, the system will know sent how many pulse to the servo motor, and received a number of pulse back, so, can accurate control of motor rotation, thereby realizing the accurate positioning, can achieve 0.001mm.DC servo motor is divided into the brush and brushless motor. Brush motor has the advantages of simple structure, low cost, high starting torque, wide speed range, easy control, maintenance, and the maintenance is not convenient ( Replacement Brush ), electromagnetic interference, environmental requirements. So it can be used for cost sensitive ordinary industrial and civil cases. Brushless motor has the advantages of small volume, light weight, large output force, fast response, high speed, small inertia, smooth rotation, torque is stable. Complex control, easy to achieve the intelligent, the electronic commutation mode is flexible, can be square wave commutation or sinusoidal commutation. Motor maintenance free, high efficiency, low operating temperature, electromagnetic radiation is very small, long life, can be used in various environments. 2 AC servo motor is a brushless motor, divided into synchronous and asynchronous motor, the motor control in general with the synchronous motor, its scope of power, can do a lot of power. Large inertia, the highest rotation speed is low, and with the power increasing and the rapid decrease of. Thus it is suitable for high speed running smoothly application. The 3 servo motor is a permanent magnet inside the rotor, drive control of U / V / W three-phase electric and electromagnetic field is formed in the magnetic field, the rotor rotates under the action of the motor, at the same time with encoder feedback signal to the drive, drive according to the feedback value is compared to a target value, adjusting the rotation angle. Servo motor accuracy depends on the precision of encoder ( line number ).

Now more commonly used the stepper motor including a reactive type stepping motor, permanent magnet stepper motor, hybrid stepping motor and single-phase stepping motor. The reaction stepping motor rotor magnetic circuit made of soft magnetic material, with the multi phase exciting winding, the magnetic conductance changes to produce torque. At this stage, reaction stepping motor for most applications.Stepper motors and General Motors differ mainly lies in its pulse drive form, it is this characteristic, the stepper motor can be and modern digital control technique. But the stepper motor in the control precision, the speed range, low-speed performance is inferior to conventional closed loop control of DC servo motor. The accuracy is not in need of special high occasions can use the stepper motor, stepper motor can exert its simple structure, high reliability and low cost characteristics. The use of the appropriate time, even with the DC servo motor performance comparable to.Stepper motor is widely applied in the production practice fields. Its largest application is in the manufacture of CNC machine tools, because the stepping motor does not require A / D conversion, can be directly digital pulse signals into angular displacement, so it is considered ideal NC machine tool components. Early stepping motor output torque is relatively small, can not meet the need, in use and hydraulic torque amplifier with a hydraulic pulse motor. With the development of technology of stepper motor, stepper motor has been able to separate in the system to use, has become an irreplaceable executive element. Such as stepping motor used in CNC milling machine feed servo drive motor, in this application, the stepper motor can be simultaneously completed two work, one of which is the torque transmission, the transmission of information. The stepper motor can also be used as CNC worm wheel gear grinding machine drive motor synchronous system. In addition to the application of NC machine tool, a stepping motor and can also be used on other machines, such as automatic feeding machine motor, as universal floppy drive motor, but also can be used in printers and plotters.Stepping motor with its remarkable characteristics, in the era of digital manufacturing plays a major use. With the different digital technology development as well as the stepping motor itself technology improves, the stepping motor will be applied in more and more fields.

Stepper motor as the actuator, electromechanical integration of key products, widely used in various automation control system. With the development of microelectronics and computer technology, the stepper motor demand grow with each passing day, in various areas of national economy.The last century appeared step motor, it is a free rotary electromagnet, principle of action and reaction today stepping motor no difference, but also rely on the air-gap permeance variation to generate electromagnetic torque. At the beginning of this century, the capitalist powers contending for colonies, shipbuilding industry development is very rapid, also make at the same time stepping motor technology got great progress. By the age of 80 after, due to cheap microcomputers to multifunctional posture, stepping motor control in more flexible ways. The original stepper motor control system using discrete components or integrated circuit control circuit, not only the installation of debugging complex, needs to consume a large amount of components, and once the stereotypes, to change the control program must be redesigned circuit. The computer software to control the stepper motor, better mining motor potential. Therefore, using computer to control the stepper motor has become an inevitable trend, also accord with the trend of digital era. Stepper motors and general motors is the difference between the stepper motor receiving a pulse signal control. The stepping motor by a ring distributor of electronic switching devices, through the power amplifier in order to excitation winding turns on DC power supply. Due to the excitation winding in the space according to a certain order, turns and DC power supply is switched on, will be in the space to form a step change of the rotating magnetic field, so that the rotor stepping rotation, with the increased frequency of pulse, speed will be increased. Stepper motor rotating at the same time and phase number, distribution, the rotor gear number.

DC motor is to rely on direct current working voltage operation of the motor, widely used in tape recorders, video recorders, video machines, electric shavers, hair dryer, electronic watches, toys and other. 1 electromagnetic DC motor electromagnetic DC motor consists of stator poles, a rotor ( armature commutator ( commutator ), commonly known as ), brush, shell, bearing components, electromagnetic DC motor stator poles ( the main magnetic pole ) composed of an iron core and a field winding that forms. According to its excitation (the old standard called the exciting ) the different ways can be divided into series DC motor, DC motor, separately excited DC motor and compound wound DC motor. Because of different excitation mode, stator pole flux (by the stator magnetic pole coil excitation electricity generated ) of different. The series excitation DC motor excitation winding and the rotor winding is connected in series between the brush and the commutator, field current and armature current proportional to the stator magnetic flux, with the excitation current increases, the armature current and torque is approximately proportional to the square of the speed, torque and current increases with the rapid decline. The starting torque to rated torque 5 times above, short time overload torque can reach more than 4 times the rated torque, speed change rate is larger, no-load speed is very high ( generally do not allow the no-load operation ). Can use external resistor and the series winding series ( or parallel ), or the series winding in parallel to achieve the speed change. Shunt excited DC motor excitation winding and the rotor windings are connected in parallel, the excitation current is constant, the starting torque and the armature current is proportional to, starting current is about 2.5 times of the rated current of about. Speed with the current and torque increases slightly, short-time overload torque Rated torque 1.5 times. Speed change rate is small, from 5% to 15%. Through the weakened field constant power to the governor. Separately excited DC motor excitation winding received independent excitation power supply, the excitation current is constant, the starting torque and the armature current is proportional to. Speed variation for 5% ~ 15%. Through the weakened field constant power to increase the speed or by decreasing the rotor winding voltage to reduce speed. Compound wound DC motor stator magnetic pole in addition to the shunt winding, also fitted with the rotor winding connected in series with the series winding ( of the relatively small number of turns ). The series winding to generate a magnetic flux direction and the main winding of the magnetic flux direction, starting torque Rated torque of about 4 times the left and right sides, short time overload torque Rated torque is about 3.5 times. Speed variation rate is 25% ~ 30% ( with the series winding related). Speed through the weak magnetic field strength to adjust. Commutator bar the use of silver and copper, cadmium and copper alloy materials, high strength plastic molded into. Brush sliding contact with a commutator, provide for rotor winding armature current. Electromagnetic DC motor brush generally use a metal graphite brush or electrochemical graphite brush. Rotor iron core made of silicon steel sheet laminating, generally 12 slot, with 12 groups of armature winding, the winding is connected in series between the rear, connected with the 12 commutator bar connection.

AC servo system based on the processing of signal in different ways, can be divided into analog servo, digital analog hybrid servo and full digital servo; if used according to the servo motor is different, can be divided into two types: one is made of permanent magnetic synchronous motor servo system, including Fang Boyong magnet synchronous motor ( brushless DC machine ) servo system and permanent magnet synchronous motor servo system; another is to use squirrel-cage asynchronous motor servo system. The two difference is that the permanent magnet synchronous motor servo system needs to use the pole position sensor and induction motor servo system containing a slip frequency calculation. If the microprocessor realization of software servo control, can lead to permanent magnet synchronous motor and the squirrel cage type asynchronous motor using the same set of servo amplifier.