2012年6月14日 星期四

High-power protection circuit for PLC

All transistor outputs of DVP-ES2/EX2 series PLC contain diode for back EMF protection, which is sufficient for small-power conductive load and average ON/OFF application frequency.
However, in big-power or high ON/OFF frequency environments, please connect to another suppression circuit (as shown in the figure below) to lower the noise and prevent damages on the transistor output circuit resulting from over-voltage or overheating.

The transistor outputs are all open collector; therefore, if Y0/Y1 is set to be pulse output and to ensure the transistor module works normally, the pull-up resistor has to be maintained at output current > 0.1A.
Circuit wiring for transistor output:

information sources:DELTA

2012年6月12日 星期二

大功率抑制電路

DVP-ES2/EX2系列PLC之電晶體輸出均已包含反電勢保護之二極體,對於小功率電感性負載 且ON/OFF頻率不高之應用已足夠,但在大功率或ON/OFF頻繁之場合,請依下列方法另接抑制電路以降低雜訊干擾及防止過電壓或過熱而損壞電晶體輸出電路。

因電晶體模組輸出均為開集極輸出 (Open Collector),若Y0/Y1設定為脈波串輸出,為確保電晶體模組能夠動作正常,其輸出提升電阻必須維持輸出電流大於0.1A。

電晶體輸出回路配線(如下圖)



















資料來源:台達網站FAQ

2012年6月9日 星期六

Delta’s ASDA Series AC Servo System and Coil Winding Machine


[Introduction] 
There are many daily applications that use coils, such as the pickup head of a DVD player, power supplies,
electronic transformers, switching transformers and motors. In particular, applications for motors are various and many.
 The vehicle industry is a typical example, where just one luxury vehicle requires almost 150 motors. The
requirements for motors are also very high.
In general, a motor has a stator and a rotor.
The stator is a stationary element, and the rotor is a rotating element.
A stator comprises plural stacked silicon steel plates wrapped in several sets of tightly-wound copper wires called coils.
The coil’s winding is critical in the manufacturing process of stator construction and also very important for the quality of the motor.
There are many kinds of coil winding machines for the manufacturing of many types of stators.
For coil winding machine applications, Delta provides high-resolution servo systems to facilitate the high-speed and high-precision winding process.

[Functions] 
Typically, a coil winding machine includes at least one XYZ moveable table and one high-speed rotatable spindle axis.
With single-axis point to point motion commands, the XYZ moveable table moves the motor stator to the working position where copper wires are fastened, wound and cut.
 To complete the winding automatically, the XYZ moveable table fastens the head of the copper wire on fixed pins.
The spindle axis adopts Delta’s servo systems which carry a feeder, supply copper wires, and wrap the stacked silicon steel plates in several sets of tightly-wound copper wires.
After the winding is complete, Delta’s servo systems help the system to stop precisely at the working position and ensure the copper wires are coupled and not released.
With increased winding speed production capability is enhanced substantially.


[Delta’s Total Solution] 
Delta’s ASDA series AC servo systems provide the following features to satisfy customer requirements. .
Main Features of Delta’s AC Servo Systems
(1) Various control modes for connecting to varied host controllers in a wide range of applications
(2) Speed and Position smooth parameters smooth the input signals effectively.
(3) Robust control function, if the load inertia changes greatly, optimal system performance continues.
(4) Powerful high-frequency resonance and low-frequency vibration suppression functions improve the resonance and
vibration efficiently.
(5) Max. 1kHz frequency response responds to command changes without delay.
(6) A complete range of software functions conveniently set and adjust system performance.
(7) The ASDA-A2 series offers up to 1280000ppr and the ASDA-B2 series offers up to 160000ppr motor encoder resolution to control the position precisely and smooth operation.


For more information on Delta’s industrial automation products, visit our website at
http://www.delta.com.tw/industrialautomation