固态继电器中英文介绍

【电子资讯】固态继电器中英文介绍

固态继电器(Solid State Relay,缩写SSR),是由微电子电路,分立电子器件,电力电子功率器件组成的无触点开关。用隔离器件实现了控制端与负载端的隔离。固态继电器的输入端用微小的控制信号,达到直接驱动大电流负载。

固态继电器对于控制电压固定的控制信号,采用阻性输入电路。控制电流保证在大于5mA。对于大的变化范围的控制信号(如3-32V)则采用恒流电路,保证在整个电压变化范围内电流在大于5mA可靠工作。隔离驱动电路:隔离电路采用光-电耦合和高频变压器耦合(磁电耦合),光电耦合通常使用光电二极管—光电三极管,光电二极管—双向光控可控硅,光伏电池,实现控制侧与负载侧隔离控制。高频变压器耦合是利用输入的控制信号产生的自激高频信号经耦合到次级,经检波整流,逻辑电路处理形成驱动信号。SSR的功率开关直接接入电源与负载端,实现对负载电源的通断切换。主要使用有大功率晶体三极管(开关管-Transistor),单向可控硅(Thyristor或SCR),双向可控硅(Triac),功率场效应管(MOSFET),绝缘栅型双极晶体管(IGBT).固态继电器可以方便的与TTL,MOS逻辑电路连接。专用的固态继电器可以具有短路保护,过载保护和过热保护功能,与组合逻辑固化封装就可以实现用户需要的智能模块,直接用于控制系统中。

固态继电器是具有隔离功能的无触点电子开关,在开关过程中无机械接触部件,因此固态继电器除具有与电磁继电器一样的功能外,还具有逻辑电路兼容,耐振耐机械冲击,安装位置无限制,具有良好的防潮防霉防腐蚀性能,在防爆和防止臭氧污染方面的性能也极佳,输入功率小,灵敏度高,控制功率小,电磁兼容性好,噪声低和工作频率高等特点。目前已广泛应用于计算机外围接口设备,调温、调速、调光、电机控制、电炉加温控制、电力石化、医疗器械、金融设备、煤碳、仪器仪表、交通信号等领域。

Solid State Relay (Solid State Relay, abbreviated SSR), by microelectronic circuits, discrete electronic devices, power electronic devices composed of non-contact power switch. With isolation devices to achieve the control side and load side of the isolation. Solid state relays with small control input signal to directly drive high current loads.

For a fixed control voltage solid state relay control signal, the use of resistive input circuit. Control current is guaranteed in more than 5mA. For a large range of control signals (such as 3-32V) constant current circuit is used to ensure that the entire voltage range greater than 5mA current and reliable work. Isolated drive circuit: the use of optical isolation circuit - electrical coupling and high frequency transformer coupling (magnetic coupling), the optical coupler is commonly used photodiode - phototransistors, photodiodes - two-way light-controlled thyristor, photovoltaic cells, to achieve the control side and load side of the isolation control. Is the use of high-frequency transformer-coupled input control signal generated by the self-excited high-frequency signal coupled to the secondary, rectified by the detector, the formation of the drive signal processing logic. SSR direct access to the power switch power supply and load side, to achieve the load off the power switch. The main use of high-power transistor (switch-Transistor), one-way SCR (Thyristor or SCR), triac (Triac), Power FET (MOSFET), insulated gate bipolar transistor (IGBT) Solid State Relay can be easily and TTL, MOS logic circuits. Special solid-state relay can have short-circuit protection, overload and thermal protection, and the combinational logic can be achieved cure package user needs intelligent module directly to the control system.

Isolated solid state relay is a function of the non-contact electronic switch in the switching process without mechanical contact parts, in addition to solid state relays with electromagnetic relay with the same function, but also compatible with logic circuits, resistance to mechanical impact resistance, vibration, installation location unrestricted, with good moisture mildew and corrosion, explosion-proof and prevent ozone pollution in the terms of the performance is also excellent, input power, high sensitivity, small power control, electromagnetic compatibility, low noise and high frequency characteristics. Has been widely used in computer peripheral interface devices, thermostat, speed control, dimming, motor control, electric heating control, electric power petrochemical, medical equipment, financial equipment, coal, instrumentation, traffic signals and other fields.

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