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Working principle of slow wire processing

 Slow wire walking, also called low-speed wire walking, is a kind of CNC machining machine tool that uses continuously moving fine metal wire as an electrode to pulse spark discharge on the workpiece to generate a high temperature of over 6000 degrees, ablate metal and cut into a workpiece. The principle of wire processing is the phenomenon that there is a gap between the wire electrode and the workpiece, and the metal is removed by continuous discharge. Since the slow-moving wire cutting machine adopts the method of wire electrode continuous feeding, that is, the wire electrode is processed during the movement, so even if the wire electrode is worn out, it can be continuously supplemented, so it can improve the machining accuracy of the parts and slow the wire. The surface roughness of the workpiece processed by the cutting machine can usually reach Ra=0.8μm and above, and the roundness error, linear error and dimensional error of the slow-moving wire cutting machine are much bett...

Hydrostatic guideway of CNC machining lathe

The static pressure slide rail (TTW guide) of the CNC machining lathe transfers the oil with a certain pressure through the throttle to the oil cavity between the sliding surfaces of the slide rail (TTW guide) to form a pressure oil film to float the moving parts , Make the sliding rail (TTW guide) surface in a pure liquid friction state.   CNC machining General CNC machining usually refers to computer digital control precision machining, CNC machining lathe, CNC machining milling machine, CNC machining c17200   beryllium   copper   and milling machine, etc. The feed route of finishing is basically carried out along the part contour sequence. Therefore, the focus of determining the feed route is to determine the feed route of rough machining and idle stroke. In the numerical control processing, the control system issues instructions to make the tool perform various motions that meet the requirements, and the shape and size of the workpiece are expressed in the form o...

Hydrostatic guideway of CNC machining lathe

The static pressure slide rail (TTW guide) of the CNC machining lathe transfers the oil with a certain pressure through the throttle to the oil cavity between the sliding surfaces of the slide rail (TTW guide) to form a pressure oil film to float the moving parts , Make the sliding rail (TTW guide) surface in a pure liquid friction state.   CNC machining General CNC machining usually refers to computer digital control precision machining, CNC machining lathe, CNC machining milling machine, CNC machining c17200   beryllium   copper   and milling machine, etc. The feed route of finishing is basically carried out along the part contour sequence. Therefore, the focus of determining the feed route is to determine the feed route of rough machining and idle stroke. In the numerical control processing, the control system issues instructions to make the tool perform various motions that meet the requirements, and the shape and size of the workpiece are expressed in the form o...

Semikron SKM200GAL176D

Semikron SKM200GAL176D
#SKM200GAL176D Semikron SKM200GAL176D New POWER IGBT TRANSISTOR , SKM200GAL176D pictures, SKM200GAL176D price, #SKM200GAL176D supplier
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Email: [email protected]

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SKM200GAL176D Features:
 
• MOS input (voltage controlled)
• N channel, Homogeneous Si
• Low inductance case
• Very low tail current with low temperature dependence
• High short circuit capability, self limiting to 6 * Icnom
• Latch-up free
• Fast & soft inverse CAL diodes8)
Isolated copper baseplate sing DCB Direct Copper Bonding
• Large clearance (13 mm) and creepage distances (20 mm).
Typical Applications:
• AC inverter drives on mains 575 - 750 VAC
• DC bus voltage 750 - 1200 VDC
• Public transport (auxiliary syst.)
• Switching (not for linear use)
1) Tcase = 25 °C, unless otherwise specified 2) IF = – IC, VR = 1200 V, – diF/dt = 1000 A/µs, VGE = 0 V
6) The free-wheeling diodes of the GAL, GAR and D1 types have the data of the inverse diodes
of SKM 300 GA 173 D
8) CAL = Controlled Axial Lifetime Technology.
Maximum ratings and characteristics 
.Absolute maximum ratings (Tc=25°C unless without specified)
Collector-Emitter voltage Vces:1700V
Gate-Emitter voltage VGES:±20V
Collector current Ic:220A
Collector current Icp:440A
Collector power dissipation Pc:1250W
Collector-Emitter voltage VCES:4000V
Operating junction temperature Tj:+150°C
Storage temperature Tstg :-40 to +125°C

POWER IGBT TRANSISTOR

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