News
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PRODUCTION STANDARD OF ZW SERIES WELDING DIODE
The normative references which applied by Jiangsu Yangjie Runau Semiconductor Co in the production of welding diode were at following: 1. GB/T 4023—1997 Discrete Devices Of Semiconductor Devices And Integrated Circuits Part 2: Rectifier Diodes 2. GB/T 4937—1995 Mechanical And Climatic Test Meth...Read more -
INSPECTION AND PACKAGE OF ZW SERIES WELDING DIODE
Test methods and inspection rules 1. Batch by batch inspection (Group A inspection) Each batch of products should be inspected according to Table 1, and all items in Table 1 are non-destructive. Table 1 Inspection Per Batch Group InspectionItem Inspection Method Criterion AQL (Ⅱ) A1 ...Read more -
Precautions for replacing thyristors
The following issues should be noted when replacing thyristors: 1. When replacing the thyristors, the first thing to pay attention to is several faces: the two faces of a thyristor, and the face of the upper and lower radiator. First, paying attention to the surface can not have pits, hair, debri...Read more -
Election of soft starting element of motor
Motor power P=220KW Motor input voltage U=380V Three-phase power supply power calculation formula P=1.732*U*I*cosa The values of U and I are valid Usually when the motor starts, cosa=0.8 average current per phase IT(AV)=0.9*I Average advection IT1(AV) for each component =0.45*I The starting curre...Read more -
Jiangsu Yangjie Runau Semiconductor Co., Ltd. barbecued in May
Yangzhou, A beautiful city in the north of the Yangtze River, is not only home to the Slender West Lake, a world-class five-A-level scenic spot, extensive and profound Buddhist culture, but also there is excellent food in Yangzhou. Love your hometown from falling in love with Yangzhou food! In or...Read more -
Consideration of voltage equalization in series components
When components are used in series, voltage balancing is usually required. The circuit form of voltage balancing is shown in Figure below 1.In order to ensure that the voltage on the component is balanced, the current flowing through the voltage balancing loop is usually required to be more than...Read more -
ASSEMBLE METHODS AND CAUTIONS OF POWER SEMICONDUCTOR HEATSINK
The heatsink is the necessary device to cool the power semiconductor device such as disc type and module type thyristor and diode by forced air or water. In order to maintain the normal and reliable performance, it is necessary to choose a suitable heatsink and assemble it properly. The main meth...Read more -
Influence of low atmospheric pressure (above 2000m above sea level) on safety performance of electronic products
1，Insulation materials in the electric field will also be destroyed due to its insulation strength and lose due insulation performance, then there will be insulation breakdown phenomenon. Standards GB4943 and GB8898 stipulate electrical clearance, creepage distance and insulation penetration dis...Read more -
Influence of low atmospheric pressure (above 2000m above sea level) on safety performance of electronic products
At present, the international standards for information technology equipment and audio and video equipment are IEC60950, IEC60065, their application scope is 2000m above sea level below the area, mainly in dry areas and temperate or tropical climate conditions to use the equipment, and the high a...Read more -
THE SELECTION OF SUITABLE HEATSINK FOR COOLING POWER SEMICONDUCTOR DEVICE
1. Water cooling assembly of heat sink and device The cooling mode of assemblies include natural cooling with heat sink, forced air cooling and water cooling. In order to enable the device employ the rated performance reliably in application, it is necessary to choose a suitable water cooling hea...Read more -
An Example of Device Selection for Motor Transmission Control (soft starter)
A three-phase thyristor rectifier bridge is required to control a DC motor. The suitable device is important to ensure the stable operation of the soft starter to control the motor and it must selected to coincide with the property of motor and requirement of system. The selection principle provi...Read more -
Precautions of Replacing the Thyristor or Rectifier
When we replacing the disc type thyristor or rectifier, the following issues should be noted: 1. The first thing should pay attention to is the contact areas of the device two sides as well as the top and bottom contact area of the heatsink. Any pits, burrs or articles…etc on the surface which wi...Read more
