Reliability status of contactless voltage regulator

结合我国供电现状，专为稳定交流电压而研制的节能型产品，当配电网络供电电压波动或负载变化时，能自动保证输出电压的稳定，具有容量大、效率高、稳压范围宽、无附加波形失真和相移、应变时间快、平稳等特点，并有过压、过流、缺相、短路，机械故障等完善报警保护功能，同时体积紧凑小巧，是传统机器的三分之二，人性化的设计，采用液晶显示，使用方便，所有的操作在前面板上一目了然，可以使稳压器靠墙安装，减少安装空间，采用国际专利最先进的DSP数字技术，能在非常短的时间那处理大量的讯息，有效提高了效率和可靠性，清晰的LCD显示面板由微处理器控制，可显示：状态及告警信息、输入、输出参数测量：电流、电压所有参数调试在出厂前已全部完成，用户只需按面板上的“启动”按键开机或按“停止”按键关机即可。

Combined with the current situation of power supply in China, the energy-saving products specially developed for stabilizing AC voltage can automatically ensure the stability of output voltage when the supply voltage of distribution network fluctuates or the load changes. It has the characteristics of large capacity, high efficiency, wide range of voltage stabilization, no additional waveform distortion and phase shift, fast and stable strain time, as well as overvoltage, over-current, phase loss, short circuit, mechanical fault, etc Perfect alarm protection function, compact and compact, is two-thirds of the traditional machine. The humanized design and LCD display make it easy to use. All operations are clear at a glance on the front panel. The regulator can be installed against the wall to reduce the installation space. The most advanced DSP digital technology of international patent can process a lot of information in a very short time, which is effective The efficiency and reliability are improved. The clear LCD display panel is controlled by microprocessor, which can display status and alarm information, input and output parameters measurement: all parameters of current and voltage have been debugged before delivery. Users only need to press the "start" button on the panel to start the machine or press the "stop" button to shut down.

二、无触点稳压器性能比较

2、 Performance comparison of contactless voltage regulators

自耦式：此种结构的无触点稳压器，是通过控制双向可控硅的通断，来直接改变自耦变压器的变比，从而达到稳定输入电压的目的。由于双向可控硅直接串接在主电路商，器件选择受限制（相同容量的稳压器，需选择大功率器件），可靠性差。

Autotransformer: the contactless voltage regulator with this structure can directly change the transformation ratio of autotransformer by controlling the on-off of bidirectional thyristor, so as to stabilize the input voltage. Because the bidirectional thyristor is directly connected in series in the main circuit supplier, the selection of devices is limited (the same capacity voltage regulator needs to choose high-power devices), so the reliability is poor.

纯补偿式：此种结构是通过双向可控硅的通断，控制补偿变压器组合的投入、退出或改变极性，从而达到稳定输出电压的目的。由于其双向可控硅通过桥臂形式，直接接在相线与零线之间（220V），因而工作电压高，换档时产生的浪涌电流大；且在双向可控硅误动动作时，容易产生直通现象，故障率极高。

Pure compensation type: this kind of structure can control the input, exit or change the polarity of the compensation transformer combination through the on-off of bidirectional thyristor, so as to achieve the purpose of stabilizing the output voltage. Because the bidirectional thyristor is directly connected between the phase line and the zero line (220 V) through the bridge arm, the working voltage is high, and the surge current generated during gear shifting is large; moreover, when the bidirectional thyristor misoperates, it is easy to produce through phenomenon and the failure rate is very high.