Engine based on micro controller MC9S12 high-energy ignition control directly motor electric

 electric induction motor fan blade for ac motor 
Specifications
1. 20 years manufacturing experience 
2. competitive price,high quality
3. Delivery Detail:within 10 days after receiving deposit 
With the development of electronic technology and the improvement of engine performance, the microcomputer control of the electronic ignition system is gradually replaced the traditional engine ignition system, implements the more precise control of ignition time and ignition energy. In the engine ignition system, the use of each engine cylinder with a ignition coil, an independent control of each cylinder ignition coil of the ignition system, called no distributor each generator cylinder independent ignition system, also called the high-energy ignition system directly. Using high energy ignition directly can effectively increase the ignition coil primary circuit of the energy storage and reduce the transmission loss ignition energy, thus improve the ignition energy, single phase 3 hp motor meet the lean-burn vehicle engines, pressurization and the use of alternative fuels such as natural gas, alcohol) requirements of synchronous generator the development of ac synchronous generator new technologies. 


Totally Enclosed Protect Feature and Three-phase Phase low rpm ac electric motor
Specifications
1.IEC standard 
2.OEM 
3.Voltage:50HZ &60HZ;380V&415V 
4.Protection class: IP54 

5.Packaging Details:80-112 carton box 132 and above ply wooden box
For multi- cylinder engine, the high energy ignition system as control events more directly, the requirements of the ac induction motor control circuit and control software is complex, so the performance of the micro controller and control software are have high requirements [1]. MC9S12 series was developed by MOTOROLA company a www.facebook.com/dongfeng.motor high- performance pump parts 16-bit microcontroller (MCU), has the rich I/o interface function, strong ability of numerical arithmetic and logical operations, especially also has strong function ac generator of timing control, make it suitable for the application of the complex sequential control technology in [2]. Based on high energy direct ignition of magnetic generator six-cylinder car engine control system development, the MC9S12DP256 micro controller as the core of software and hardware system design of electronic control unit.

PWM technology influences the characteristics of motor

Cast iron ac induction electric fan motor parts 

Specifications
1. 20 years manufacturing experience 
2. competitive price,high quality 

3. Type: iron body of AC electric motor
After the last illustrates the chopper battery and motor current is no longer the same physical process, the following mathematical expression is used to demonstrate the PWM influences the characteristics of motor. Motor PWM control theory is a familiar formula (power tube as an ideal switch device, it does not auto spare parts cause obvious errors), namely 3 phase induction motor the VD = rho VB (1), DVD - the average voltage of the motor VB - battery voltage. As long as the filter capacitance is large enough, the battery internal resistance is small enough, VB can be considered to be stable. Rho - control pulse duty ratio (0 ≦ rho ≦ 1). Chopper state rho for a decimal. (1) show that there are chopping, voltage of the rotor motor is reduced, this is the principle of speed regulation. Chopper is stable after, motor current waveform is cyclical approximate triangular wave, can be mathematically proved that the motor current average ID (if for the brushless motor, ID should be interpreted as the average of the conduction phase within the current). ID = IB/rho or IB = rho ID (2) that the average - IB battery current in motor current be amplified to the battery current IB 1 / rho times. With the current of battery, transform the big current of motor or motor torque, this is one of the important role of the controller, so, sometimes referred to as the converter controller. 

Y2 series high power China ac motor
Specifications
1. effiency: IE2 and IE1 
2. 20 years manufacturing experience 
3. 12 months guarantee 

4. low noise and vibtration 
At this time, acmotor2.blogspot.com the motor of the electric potential equation for VD R0 = ED + ID * (3) in R0 - motor diesel generator set coil resistance ED - the counter electromotive force. ED is proportional to motor speed locked-rotor when ED is 0, if the current limit of the controller is stable chopper technology, magnetic generator the above various remains valid. Type of motor can be obtained by (3) locked-rotor current IDmax, reuse (1) get IDmax = VD/R0 = rho t VB/R0 = rho tIB0max (4), IB0max = VB/R0 -- without stalling a motor current controller, also single phase induction motor called full pressure starting current rho t - design decision control pulse duty ratio. This shows that the maximum current of a motor is unlimited flow of rho t times, be reduced, which is exactly what we expect of current limit. Using (2) and (4), can be obtained after the battery generator current stable value (not the maximum reasons shall be described below), the motor current and full pressure maximum starting current relation between IBfinal = IDmax alternator generator rho t = 2 t IB0max rho (5) ac induction motor of these three values are measurable, the above relationship can also be verified. When rho = 1, the equivalent of the motor directly connected to the battery, so (4) into a VB R0 = EB0 + IB0 * (6) (3) and (6), respectively, described the motor is chopping and no chopping the potential equilibrium equation of state of the two. (6) of the motor current and back emf with index 0, with the state of the chopper motor current and back emf value is not the same.

The selection of contactor electric control system design

 Is used to contact with a load of main circuit connected or cut off automatically. acmotortrading.blogspot.com Points and two types of ac and dc, ac contactor is most used in machine tool. Choose contactor mainly consider the following technical data: (1) the types of power supply: ac or dc. squirrel cage induction motor (2) the main contact 3 phase induction motor rated voltage, rated current; (3) the auxiliary contact type, number and contact of rated current; (4) the power of electric motor parts the electromagnetic coil type, frequency and rated 3 phase induction motor voltage; (5) the rated operating frequency (b/h), which allowed through to the most single phase induction motor times per hour. Main contact rated current, generally calculate according to the motor capacity Pd three phase induction motor contact permanent magnet generator generator current Ic, namely: the electrical control system design - the conversation of the heart - the heart of the dialogue. Type: constant K experience, usually take 1 ~ 1.4; Pd motor generator power (kW); Ud motor rated line voltage (V); ac motors Ic contactor main contact current (A);

The use of the insulation resistance meter megohm meter method

high efficiency high power electric motor Y2 motor

Specifications
1. effiency: IE2 and IE1 
2. 20 years manufacturing experience 
3. 12 months guarantee 

4. low noise and vibtration
Megohmmeter at work, its produce high voltage, the measured object is electrical equipment, so must be used correctly, otherwise it will cause personal and equipment accident. Before use, first of all, to do well the following preparation: (1) the measurement device under test must be before the power cut off, and the short circuit discharge, never promised to electric measuring equipment, to ensure the www.dongfeng-motor.com safety of person and equipment. (2) the possible induction of high voltage equipment, must eliminate this possibility, can be measured. Analyte (3) to clean surface, reduce the contact resistance, ensure the accuracy of measurement results. (4) to check whether megohmmeter before measuring the normal working state, the main check the "0" and "up" two points. The rocking handle, make the motor to achieve rated speed, when short 3 phase induction motor circuit by megger refers to the "0" position, should be to point to in the "up" position when open. (5) when used by Induction motor megger should be in a stable, strong place, permanent magnet motor and away from the big current conductor and external magnetic field.

Switch the characteristics of the present and future - SPC exchange and technology trends

Totally Enclosed Protect Feature and Three-phase Phase low rpm ac electric motor
Specifications
Specifications1.3-phase asynchronous motors 
2.IEC standard 
3.OEM 
4.Voltage:50HZ &60HZ;380V&415V 
5.Protection class: IP54 
SPC digital exchange is the modern digital communication technology, computer technology single phase ac motor and large scale integrated circuit (LSI) products of organic combination. Advanced hardware and perfect the software integrated into an organic whole, give the SPC exchange with many functions and features, to make it compared with the mechanical and electrical switches, has the following advantages: 1. Small volume, light weight, low power consumption, it is only about 1/8 of the crossbar switch volume - 1/4, greatly compress the room occupancy area, save the cost. 2. The flexibility to provide customers with numerous new business services. Because of using the SPC technology, thus it can be convenient by the software increase or modify the switch function, to provide customers with new services, such as abbreviated dialing, call waiting, call transfer, call forwarding, busy callback, the single phase induction motor hotline, conference calls, has brought great convenience to users. 3. Stable and reliable work, convenient maintenance, due to the large scale integrated circuit (LSI) commonly used SPC exchange circuit or application-specific integrated circuit (ASIC), and therefore has a high reliability.


generator Stator Rotor 

Specifications
1. 20 years manufacturing experience 
2. competitive price,high quality 

3. Accessories Series: stator and rotor 
 It usually USES the redundancy technology or automatic fault diagnosis measures, to further improve the reliability of the system. In addition, the SPC exchange with the help of a fault diagnosis program for automatic fault detection and location, and to discover and troubleshooting, thereby significantly reducing the workload of maintenance. System can easily provide automatic billing, traffic, service quality automatic monitoring, overload control and brought convenient to maintenance and management work. 4. Easy to use the new total signal way (CCS, Common Channel Signalling). Because of SPC Digital switches and Digital transmission equipment can be directly to Digital connection, providing motor electric high-speed public channel signal, is suitable for the use of advanced way of CCITT no. 7 signalling, so as to make the signal transmission speed, large capacity, high efficiency, and can adapt to the future new business and the characteristics of the Network control, in order to achieve the comprehensive Network (ISDN, Integrated Services Digital Network) to create the necessary conditions. 5. Easy and digital terminal, digital transmission system, digital terminals, transmission and exchange of integrated and unified. Can expand communication capacity, improve quality, reduce investment, communication system and for the development of integrated digital network (idns) and integrated services digital network (ISDN) lay the foundation.

Switching network Repeaters to go in and out

 AC fan cooling motor fan cover 
Specifications
1. Customised
2. good quality
3. Surface treatment: Galvanize
4. Type: Motor Cover
In and out of Repeaters is the interface circuit between the trunk and switching network, is used to switch trunk connections. Its features and circuit and switching system used in the system and trunk signal way has a close relationship between innings. To simulate relay interface unit (ATU), its role is to realize the simulation of the trunk and exchange network interface, basic functions in general are: sending and receiving said trunk status (such as idle, occupy, reply, release, etc.) of the line signal. Forward to receive on behalf of the called number of register signal. Supply the power supply and signal. Provide the received signal to control equipment. For the simplest case, a switch relay through solid line trunk with another switch connection, and USES the subscriber loop signal, then the simulation of the repeater function and equivalent to a "phone". If other more complex signal method, the repeater should implement the corresponding voice, signal transmission and control function. 


Totally Enclosed Protect Feature and Three-phase Phase low rpm ac electric motor

Specifications
Specifications1.3-phase asynchronous motors 
2.IEC standard 
3.OEM 
4.Voltage:50HZ &60HZ;380V&415V 

5.Protection class: IP54 
Digital trunk interface unit (DTU) role is to realize the digital trunk and the interface between the digital switching network, it was related by PCM timeslot transmission trunk signaling, complete is similar to the basic function of the simulation should bear repeater. But as a result of the digital trunk transmission way of PCM digital signal, therefore it has some special issues of digital communication, such as frame synchronization, the clock recovery, type exchange, signaling insertion and extraction and so on, which to solve the signal transmission, synchronization and signaling with three aspects of the connection 3 phase induction motor problem. The basic function of digital acmotor2.blogspot.com ac motor relay interface unit including the frame and the complex frame synchronization code generation, frame, even zero suppression, type transformation, alarm processing, clock recovery, frame synchronization search and inter-office signaling insertion and extraction etc., like permanent magnet motor BORSCHT simulated user circuit, also the above eight kinds of function of digital relay unit can be summarized as GAZPACHO.

Stepper motor step and step, the problems and solutions

 Synchronous torque generated in step motor cannot make the rotor speed single phase motor price with the rotation speed of the stator magnetic field, causing loss of steps. Step out the main reason and solution: (1) the stepper motor torque, drag the ability is not enough, when the drive pulse frequency reaches a critical value began to step out. Due to dynamic output torque of stepping motor with the continuous rise in frequency and reduce, so any working frequency is higher than the frequency will produce out of step. There are three solutions: can make the electromagnetic torque of stepping motor to produce increased, therefore can within the scope of rated current and appropriate increase the drive current. Torque is insufficient in the high frequency range, appropriate to improve the driving voltage of the drive circuit, To switch to large torque of stepping motor, etc., also can make the stepping motor to overcome torque decreases, and therefore can be appropriately reduce the frequency of motor operation, in order to improve the output torque of the motor. 

(2) step motor starting out of step. Because the stepping motor itself and the inertia load, when the accelerating time is too short will appear this phenomenon. Should set up reasonable acceleration time, make motor steady rise from low speed to a certain speed. (3) stepping motor to produce resonance is also a cause of out of step. The continuous operation of the stepping motor, if the control pulse frequency ac motor is equal to the natural frequency of the stepper motor, will produce resonance. In a control pulse cycle, vibration attenuation, has not yet been fully under a pulse has come, and so near the resonance frequency of dynamic error small diesel generator and leads to stepper motor out of step. The solution: reduce the stepper motor drive current. By adopting the method of subdivided driving and damping method. Rotor get too much energy in the process of step by step, the average speed of the rotor would be higher than the average rotational speed of the stator magnetic field, caused the stepper motor output torque increases, thus make the stepping motor produces more step. The step is when the stepper motor, the stepper motor can be reduced with the drive current, in order to reduce the output torque www.dongfeng-motor.com of stepping motor or make deceleration time longer.

FOC algorithm function

 FOC control algorithm refers to:the motor in the three-phase system of stator ac current Ia,Ib,Ic,by three phase - two phase transformation (CLARK transformation),equivalent to two phase static www.facebook.com/guohong.trading coordinates system,ac current Ia1Ib1 again by pressing the rotor field-oriented rotation transform (PARK transformation),equivalent to dc current Im1,It1 under synchronous rotating coordinate system (Im1 is equivalent to motor parts the excitation current of dc motor; It1 and torque is proportional to the armature current),and then imitate the dc motor control method,control of dc motor is obtained. Then use the PARK transformation,the CLARK transformation transform dc control volume for the required three intersection traffic,and then control the motor. Since fan motor 341 with no transfer of control method,and the beginning of the beginning of 341 does not start in a closed-loop manner,its startup mode is as follows:first,by applying specific to the motor vector,forcing the rotor moves to the specified lamination location (PARK). To PARK at the end of the open loop operation of electric Angle as the starting point,and reach the threshold speed closed-loop model,after if magnetic flux test is successful,achieve real closed-loop control,implement FOC control algorithm.

Three-phase no-load current of 2.5 0.75 KW motor,what reason be

 Two 0.75 KW..Grade 4...380 v...The motor..No-load current is between 2.3 to 2.6...Work environment textile factory..'a lot...Rated current of the motor is only 2.2...Normal no-load current is around 1.6..Time machine completely under ac electric motor the condition of no load over current...Due to the current big.So high temperature sharply born..Will soon..Overheating damage..Do not say the reason...thank you Problem complement: I thank two answer first..Disease,and together,the two are not normal before..In a few years later.You'll find the bad one current is increased.[.Repair of the motor are friends.Eliminate offline ribbon..] ...Until now,with or without load..Motor current wholesalemotor.blogspot.com is bigger...Last year when the motor current in 2.0 A..Now 2.4-2.5 A...Motor shaft sleeve inside and outside in good condition.

Have not completed...Don't go...Only electricity pilot time to run the old hot..Often the temperature in the 60-80 degrees...Wiring is right...Are the normal installation... There is a reason,is you pick the wrong wiring.380 v y connection.You make into 380 v delta connection.So,motor heat quickly.This is one magnetic generator of them.In addition,the machine is idle for a long time,must have certain load.If it is in use for a period of time after the scenario (excluding intervention had gone wrong),should be the result of mechanical failure.1 bearing damage increase torque resistance.Run 2 bearing outer ring,which leads to the bearing wear gaps (cover),the rotor eccentricity running and friction with the stator (boring),increase the electric motor 12v 500w torque resistance.What type of your motor,then measure the core size,what are you friends with line,around a few laps? I help you check it.Is estimated to be between winding insulation damage,it is recommended that you access the winding.

Questions about the servo zero switch

The change of the method has a lot of kinds,according to the requirements of precision and actual

requirements to select.Could finish (some brand servo motor servo motor itself has a full back to the

origin function),also can through the PC to complete servo,But back to the origin of the principle of

generator rotor and stator common basically has the following several kinds.One,to find the origin of the servo motor,when touching the origin switch,slowing down to stop immediately,to point to the origin.Second,back to the origin directly for encoder The Z believe,when have Z believe that number,slowing down to stop immediately.This method only commonly used in the back to the original axis of rotation,and back to the original speed is not high,the precision is not high also.The installation of the synchronous belt has a great influence on the servo positioning also? This situation,to know whether the servo tuning very soft? Common servo is controlled by pulse,so,the proportion of the position loop gain,speed loop proportional gain,integral time constant,respectively is how much? Proportion of

position loop gain: 21 percentage gain in rad/s speed loop: 105 rad/s speed loop integral time

constant: 84 ms three control modes of the servo There are three kinds of electricalmotor1.blogspot.com general servo control mode: speed control mode,the torque control mode,the position control mode.Want to know is that these three kinds of control mode according to specific what to choose? Speed control and torque control are using analog control.Pulse to control the position control is through the hair.Specific controlled by what way according to the requirements of customers,meet what kind of movement function to choose.If you didn't ask for motor speed,position,as long as a constant torque output,of course is to use the torque mode.If the position and velocity accuracy to a certain extent,and the real-time torque is not very care about,With torque model is not very convenient,with the speed or position mode is better.If the host controller has better closed-loop control functions,with a speed control effect will be better.If the request is not high,or,Almost no real time request,in position control mode has no high demands on upper controller.In the context of the response speed of the servo driver,computation of minimum torque mode,drive the fastest response to control signals;Location model computation,pumps drive the slowest response to control signals.The dynamic performance of sports have higher requirements,the need to adjust motor in real time.So if the controller itself operation speed is slow (such as PLC,or the low end of the motion controller),with the position control method.If the controller operation speed is faster,you can use speed,the position loop from the driver moved to the controller,reduce the workload of the drive,Efficiency (for example,in the most high-end motion controller);If there is a better host controller,can also use the torque mode control,the speed loop also remove in the drive,it generally only high-end dedicated controller to do that,And when does not need to use the servo motor.

Scope of application of turn-to-turn short circuit tester

Described earlier in the rotor winding interturn short circuit tester is applicable to all kinds of

electric tools with ac motor rotor test,can also be stator applied to detection of

dc motor rotor."Little experience" Unconditional homemade these tools such as readers,to find a 220 v electrical appliances with power transformer,such as power transformer for the black and white television.On the side of the core,with the hand hacksaw sawn into close to size.Can be determined

according to the object of www.facebook.com/guohong.trading measurement,at ordinary

times detection mouth (typically run backward trapezoidal) size.Here choose size is 52,mm (top),25 mm

(below),then use electric Angle grinder or grinder precision grinding is good,must not hurt when

sawing core transformer coil.This method of homemade interturn short circuit tester.When using check

rotor winding,must first put the rotor,then can give interturn short circuit tester coil power

supply.After the check,must first disconnect interturn short circuit tester coil perkins

diesel generator setpower supply,and then from the turn-to-turn short circuit test on the

rotor.Otherwise,turn-to-turn short circuit tester will become open reactor,due to its winding

excitation current is very big,will lead to coil burned interturn short circuit tester.Remember,the

best in transformer winding circuit series specifications appropriate fuse.Once the operating

error,fuse burn out,not burnt transformer winding.