主电路以反并联的晶闸管作为控制开关，控制焊接用的电阻点焊变压器通电与否。
In the main circuit, the inverse parallel couple SCRs (silicon-controlled rectifier) are used as a electric switch, switching the transformer of resistance spot welding.
另一种方法，可以增加两个电阻，用一个SPST开关禁止或使能电路。
As an alternative, you can add two resistors and use an SPST switch to disable or enable the circuit.
建立了IGBT电路仿真模型，给出了IGBT功率损耗与开关频率和栅极电阻阻值之间关系的仿真结果。
The circuit model for IGBT simulation is provided. The relationships between IGBT power loss and the switch frequency and between IGBT power loss and grid resistance are presented.
NPN晶体管开关应用中，接口电路和驱动电路的应用。内置偏置电阻(100和100科姆)。
NPN transistor for switching applications, interface circuit and driver circuit applications. With built-in bias resistors (100 and 100 kOm).
NPN晶体管开关应用中，接口电路和驱动电路的应用。借助内置的偏置电阻(2.2和2.2科姆)。
NPN transistor for switching applications, interface circuit and driver circuit applications. With built-in bias resistors (2.2 and 2.2 kOm).
本文采用后差变换，提出实现模拟电阻，电感和电容特性的开关电容仿真电路的新原理。
A new principle of switched-capacitor RLC simulation, based on backward difference transformation, is presented. SC negative impedance converters and inductance simulation circuits are designed.
本文还在此基础上设计了软开关逆变电阻焊电源主电路及控制电路：主电路选用全桥零电压零电流（FB-ZVZCS）阻焊电路，其中包括对主电路参数设计和计算；
Introduced a newly designed inverter resistance welding power on this basis, main circuit's topological structure adopt FB-ZVZCS, and do some work about the parameters design and calculate;
本文还在此基础上设计了软开关逆变电阻焊电源主电路及控制电路：主电路选用全桥零电压零电流（FB-ZVZCS）阻焊电路，其中包括对主电路参数设计和计算；
Introduced a newly designed inverter resistance welding power on this basis, main circuit's topological structure adopt FB-ZVZCS, and do some work about the parameters design and calculate;
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