A permanent magnet ac servo motor

three phase induction electric motor Y series B35 1.5KW 2.2KW 37KW 75KW

Specifications
-One year warranty 
-Within 25 days delivery 

-Life: 5-7 years 
Launched by Japan yaskawa motor manufacture small ac servo motors and drives, the D series is suitable for numerical control diesel engine machine (the maximum speed of 1000 R/min, torque is 0.25 ~ 2.8 N.m), R series is www.facebook.com/guohong.trading suitable for the robot (the maximum speed of 3000 R/min, torque is 0.016 ~ 0.16 N.m). After introduced M, F, S, H, ac synchronous generator C, G six series. In the 1990 s has launched a new D series and R series. Driven by the old series of auto 3 phase induction motor spare parts rectangular wave, 8051 single chip microcomputer control to the sine wave drive, 80 c, 154 CPU and gate array (fpga) chip control, torque fluctuation decreased from 24% to alternator generator 24%, and the and improves reliability. In this way, only a few years time formed eight series (power range of 0.05 ~ 6 kw) is a complete system, to satisfy the diesel generator set working machinery, handling, welding robot and assembly robot, electronic parts, machinery, printing machine, high speed winding machine, winding machine and so on the different needs. Famous for production of machine tool numerical control device of laws that g (Fanuc) companies in Japan, also www.dongfeng- motor.com introduced in the mid - 1980 - S series (13) and L series specifications (5) of permanent magnet ac servo motor. L series diesel engine have smaller moment of inertia and mechanical time constant, this is suitable for fast response requirements of the position servo system.

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 test process

 OEM industrial electric motors
Specifications
1. effiency: IE2 and IE1 
2. 20 years manufacturing experience 
3. 12 months guarantee 
4. low noise and vibtration
Power frequency withstand voltage test electrical equipment insulation resistance power frequency voltage ability ac electric motor test. Test, the sample (s) will be connected to the test loop by the regulation, gradually increase the voltage to the rated power frequency withstand voltage value of the standard, keep 1 min, then quickly and evenly dropping to zero. Within the prescribed period of time, the sample (s) by insulation breakdown or not surface flashover, argues that passed the test. Power frequency ac acmotor2.blogspot.com withstand voltage test on the voltage higher than the rated working voltage electric equipment, can be found through the test many insulation defects, especially for local defect is more electric generator effective, its disadvantage is that may bring insulation must be damage during pressure test, so should be in the insulation resistance, dielectric loss factor test, power frequency ac withstand voltage test can be performed.

Current transformer - measuring current transformer

Totally Enclosed Protect Feature and Three-phase Phase low rpm ac electric motor
Specifications
power range: 0.12-18.5 kW 
Centre height of frame: 63-160 mm 
Rated Voltage: 380 V 
Rated Frequency: 50Hz or 60Hz 
Main cooperate with measuring instrument, measuring current transformer in single phase motor line under normal working state, which is used to measure current, voltage, power, etc. Measuring the micro current transformer main requirements: 1, insulation and reliable, and 2, the measuring accuracy of high enough, 3, when measured circuit malfunction appeared high current transformer should be in the proper range of saturation (e.g., 500% of the rated current) to protect the measuring instrument. The current transformer. With current transformer and relay device coordination, mainly occurred in line short circuit overload acmotor2.blogspot.com failure, such as to provide signal to relay device to cut off the fault circuit, to protect the security of the power supply system. Protection with micro current transformer entirely different working conditions and the measurement of transformer, transformer protection is just in several times more than normal current current when to begin to work effectively. Protection of transformer main requirements: 1, insulation and reliable, and 2, enough accuracy limit factor, 3, magnet generator enough thermal stability and dynamic stability.

The electric auxiliary heat

Electric auxiliary refers to the PTC electrical auxiliary air conditioning hot technology. PTC ceramic is a kind of semiconductor fever, when the outside temperature is reduced, PTC resistance is less, calorific value generator set will increase accordingly. According to this principle, the use of air conditioning of PTC electric auxiliary heating technology, automatically according to the change of room temperature and the size of the indoor machine air volume and change the calorific value, so as to properly adjust indoor temperature, achieve the goal of quick, strong heating. In general, the cold weather will seriously affect the normal air conditioning refrigeration and heating function, and with the function of electric auxiliary heat air conditioning, due to small diesel generator the regulation of electric auxiliary heat to the air conditioning heat, supporting role, is very good to overcome this defect, very suitable for cold region.

The power output

Power output is on-board host to the speaker output audio signal power and the number of channels,usually with each channel output to indicate the power multiplied by permanent magnet generator the number of channels.On-board host in the car audio system similar to the original function of DVD home theater,but inside the car space is precious,so integration is electrical motor very demanding.In order to satisfy the space requirements,many car the host with the function of the power amplifier,of course,not all on-board host with amplifier function,if there is no power output,then it must be with connect car-mounted function www.facebook.com/dongfeng.motor of the power amplifier.To be sure,with the power output of the host can be connected directly to the speaker,but most of the host also can connect an external amplifier,unlike home theater VCD,host of the pre - the electrical motor 24v output voltage is higher,so the different host to the requirement of the power amplifier,when the choose and buy should pay attention to collocation.

The characteristics of the dc motor four kinds of excitation ways

Dc motor performance is closely related to its excitation mode,dc motor excitation method usually has four kinds:dc separately excited motor,dc shunt motor,dc series motor and dc compound motor.To master the respective features of four ways:1,dc separately excited motor:exciting winding and armature contact without electricity,excitation circuit is made up of other dc power supply.So the field generator stator current is not affected by the armature terminal voltage or armature current.

2,a dc shunt motor,shunt winding ends voltage is the voltage on both ends of the armature,but exciting winding with fine wire coils,the number of turns a permanent magnet motorl ot,so has larger resistance,made by single phase asynchronous motor his exciting current is small.3,the direct current series motor:exciting winding and armature in series,so this kind of motor with the change of the armature current in the magnetic field change dramatically.In order wholesalemotor.blogspot.com to make the field winding does not cause big loss and voltage drop,exciting winding resistance as small as possible,so direct current series motor is usually use coarser wire coils,his less number of turns.4,compound motor:dc motor flux produced by the two winding excitation current.