经过半天的绘制，终于把电路图画好了，请各位高手分析这焊机工作原理，里面带的电瓶是12V的，调节前面板旋钮，通过芯片处理可以给那个大电容充电到不同电压，最高可到80V，充电越高，焊接时输出功率也就越大，输出功率范围为5-50W，当充电到设定功率时，前面板的红色LED灯会亮，且里面有个蜂鸣器会响，提醒操作人员可以进行焊接了.
由于我对电路原理一窍不通，请高手分析，怎么把12V的电压给提高到80V给17000μF的大电容充电的呢？
看看厂家说明：IN ENGLISH
SIZE- 3 1/4" High, 6" Wide, 6 1/4" Deep
WEIGHT-6 1/4 Pounds
STORED WELD ENERGY - 5 to 50 Watt seconds
WIRE GAUGE - Welds wire pairs of #24 gauge or finer (#20 for J, K & E)
CYCLE TIME - Can perform 5 to 10 welds per minute, depending on energy setting
CONTROLS - Provides energy adjustment control, and visual and audio indication of weld charge cycle completion
POWER - Will operate from either AC lines or self-charging internal battery. Will perform several hundred welds on charged battery. 120 VAC 60 Hz line power (220 VAC 50 Hz optional)
CONTROLS, INDICATORS, and OVERLOAD PROTECTION
The power level available for welding is set by the position of the front of the control knob. This control also functions as the on/off switch. The knob is calibrated in Watt seconds or Joules. The maximum available power is approximately 50-Watt seconds. The control actually regulates the voltage to which the energy storage capacitor is charged. The stored energy is proportional to the square of the voltage, and the voltage can be varied between 15V and 80V. Increasing the setting of the control knob will cause the capacitor to be charged to thehigher level. However, decreasing the setting will not reduce the value already stored, so a welding cycle will always release an energy pulse equal to the highest setting since last recent discharge.
When the internal circuitry has charged the energy storage capacitor to the level set by the control knob, the front panel LED and internal sounder are activated. These inform the operator that the unit is ready for another cycle. The sounder also helps to conserve battery energy during portable operation by reminding the operator that the welder had been left on.
A circuit breaker protects against overloads. The circuit breaker opens the low voltage AC/DC supply if excessive current is being drawn. A 1/4 Amp fuse mounted on the internal circuit board is in series with the AC power cord.
HotSpot Thermocouple Welder (50 Watt Sec.) ........... $ 689.00 each
Price Includes: HotSpot Welder, Standard 6 " Wire Holding Pliers, Rechargeable Battery, Eye Shielding Protective Goggles, Grounding Magnet, Carbon Block, Instruction Booklet.
HotSpot Expansion Kit ........... $ 99.00 each
Price Includes: Wraparound Field Cover, Holding Vice, Diagonal Cutter, Miniature 5" Wire Holding Pliers, High Temperature Utility Cement, Dressing File, Extra Pair of Electrode Attachment Ferrules, Magnifier.
Wraparound Field Cover........... $ 55.95 each
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http://www.dcccorporation.com/hotspot1.html [ 此帖被lfkui在2012-03-03 19:27重新编辑 ]
