CN107093924B - Dual-power delay control dual-interlocking alternating-current stabilized voltage supply box with anti-interference function - Google Patents
Dual-power delay control dual-interlocking alternating-current stabilized voltage supply box with anti-interference function Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/008—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result preventing unsafe switching operations in substations (Schaltfehlerschutz)
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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Abstract
本发明公开了一种具有抗干扰功能的双电源延时控制双互锁交流稳压电源箱，解决了现有双路供电电源两路电源同时接通的事故发生和避免了两路电源同时切换或切换太快造成的电压叠加效应的技术问题。本发明的双电源切换及双重互锁也保证了用电设备免受两路电源同时供电的事故的发生，为增加双电源的安全性和可靠性，在两路控制信号回路上分别设计了双电源切换延时电路，在控制信号00、01、10的切换控制中实现两路电源中原先工作的一路先断电，需切换的另一路要延时3秒后再上电，即延时时间可调，从而避免了两路电源同时切换或切换太快造成的电压叠加效应，保护用电设备免受损坏。
The invention discloses a dual power delay control double interlocking AC stabilized power supply box with an anti-interference function, which solves the problem of the existing dual power supply having two power supplies connected at the same time and avoids the simultaneous switching of the two power supplies. Or the technical problem of voltage superposition effect caused by switching too fast. The dual power supply switching and double interlocking of the present invention also ensure that electrical equipment is protected from accidents in which two power supplies are powered at the same time. In order to increase the safety and reliability of the dual power supplies, dual power supplies are designed on the two control signal loops. Power switching delay circuit, in the switching control of control signals 00, 01, 10, the original working one of the two power supplies is powered off first, and the other one that needs to be switched is delayed for 3 seconds before being powered on again, that is, the delay time Adjustable, thereby avoiding the voltage superposition effect caused by two power supplies switching at the same time or switching too quickly, and protecting electrical equipment from damage.
Description
技术领域Technical field
本发明涉及一种交流稳压电源箱，特别涉及一种在煤矿井下使用的双电源供电的具有电气互锁和延时功能的交流稳压电源箱。The invention relates to an AC stabilized power supply box, in particular to an AC stabilized power supply box with electrical interlocking and delay functions for dual power supply used in coal mines.
背景技术Background technique
随着我国科学技术的发展，煤矿井下越来越多的采用计算机控制系统、安全监控系统、通讯系统以及大量的各类传感器，这些系统及设备的供电电源是由井下127V照明信号综合保护装置提供。由于煤矿井下大功率设备的频繁启动和电网传输衰减，导致井下电网电压及其不稳定。特别是井下大功率变频设备的广泛使用，使得电网中的各类浪涌、尖峰、下陷等现象更加严重，经常导致计算机数据丢失或芯片损坏，严重影响了煤矿的正常安全生产。现有技术中井下用电设备也有采用双电源供电的并采用电气互锁的方式来防止两路电源同时供电的现象的发生，当为用电设备供电的电源发生故障时，立即切换到另一路电源，因供电电源为交流电源，电流大、电压高，电源切换速度过快会因电感效应形成瞬时高电压，与切入电压叠加产生叠加效应，冲击用电设备，造成用电设备损坏。With the development of science and technology in our country, more and more computer control systems, safety monitoring systems, communication systems and a large number of various sensors are used underground in coal mines. The power supply for these systems and equipment is provided by the underground 127V lighting signal comprehensive protection device. . Due to the frequent startup of high-power equipment in coal mines and the attenuation of power grid transmission, the underground power grid voltage is extremely unstable. In particular, the widespread use of underground high-power frequency conversion equipment has made various surges, spikes, subsidence and other phenomena in the power grid more serious, often leading to computer data loss or chip damage, seriously affecting the normal safe production of coal mines. In the existing technology, underground electrical equipment also uses dual power supplies and uses electrical interlocking to prevent the occurrence of two power supplies supplying power at the same time. When the power supply for the electrical equipment fails, it immediately switches to the other power supply. Power supply, because the power supply is AC power, with large current and high voltage, if the power switching speed is too fast, an instantaneous high voltage will be formed due to the inductance effect, which will be superimposed with the cut-in voltage to produce a superimposed effect, impacting the electrical equipment, causing damage to the electrical equipment.
发明内容Contents of the invention
本发明提供了一种具有抗干扰功能的双电源延时控制双互锁交流稳压电源箱，不仅解决了现有双路供电电源两路电源同时接通的事故问题，还避免了两路电源同时切换或切换太快造成的电压叠加效应的技术问题。The invention provides a dual power delay control double interlocking AC stabilized power supply box with an anti-interference function, which not only solves the accident problem of the existing dual power supply having two power supplies connected at the same time, but also avoids the problem of the two power supplies being turned on at the same time. Technical problems caused by voltage superposition effect caused by simultaneous switching or switching too fast.
本发明是通过以下技术方案解决以上技术问题的：一种具有抗干扰功能的双电源延时控制双互锁交流稳压电源箱，包括主电源降压变压器、备用电源降压变压器、主电源接触器和备用电源接触器，主电源降压变压器的127V输出绕组的一端分别与主电源接触器的触点控制线圈的一端和主电源接触器的第一常开触点的输入端连接在一起，主电源接触器的触点控制线圈的另一端与第三继电器的公共触点连接在一起，主电源降压变压器的127V输出绕组的另一端分别与第二继电器的常开触点和主电源接触器的第二常开触点的输入端连接在一起，第三继电器的常闭触点与第二继电器的公共触点连接在一起，主电源接触器的常闭触点的输入端与备用电源接触器的第二常开触点的输出端连接在一起，主电源接触器的常闭触点的输出端分别与主电源接触器的第二常开触点输出端和稳压电源变压器一次侧绕组的一端连接在一起，备用电源接触器的常闭触点的输出端分别与备用电源接触器的第一常开触点的输出端和稳压电源变压器一次侧绕组的另一端连接在一起，主电源接触器的第一常开触点的输出端与备用电源接触器的常闭触点的输入端连接在一起，备用电源降压变压器的127V输出绕组的一端与备用电源接触器的触点控制线圈的一端及备用电源接触器的第一常开触点的输入端连接在一起，备用电源接触器的触点控制线圈的另一端与第一继电器的公共触点连接在一起，备用电源降压变压器的127V输出绕组的另一端分别与第四继电器的常开触点和备用电源接触器的第二常开触点的输入端连接在一起，第一继电器的常闭触点与第四继电器的公共触点连接在一起，稳压电源变压器二次侧输出绕组的一端与电源输出端的一端连接在一起，稳压电源变压器二次侧输出绕组的另一端与稳压电源变压器谐振绕组的一端连接在一起，稳压电源变压器谐振绕组的两端连接有串联的谐振电容和谐振电感，稳压电源变压器谐振绕组的中间抽头与电源输出端的另一端连接在一起，主电源降压变压器的二十四伏控制输出端与主电源回路的二十四伏整流电源的输入端连接在一起，备用电源降压变压器的二十四伏控制输出端与备用电源回路的二十四伏整流电源的输入端连接在一起，主电源回路的二十四伏整流电源的输出端分别与备用电源回路的二十四伏整流电源的输出端和直流十二伏稳压单元的输入端连接在一起，直流十二伏稳压单元的输出端分别与第三继电器的控制线圈的一端、第四继电器的控制线圈的一端、第一继电器的控制线圈的一端和第二继电器的控制线圈的一端连接在一起，第三继电器的控制线圈另一端分别与第四继电器的控制线圈另一端和第二达林顿三极管的发射极连接，第二达林顿三极管的集电极接地，第二达林顿三极管的基极与限流电阻的一端连接在一起，限流电阻的另一端与备用电源回路的比较器的输出端连接在一起，第一继电器的控制线圈的另一端分别与第二继电器的控制线圈的另一端和第一达林顿三极管的发射极连接在一起，第一达林顿三极管的集电极极与地连接在一起，第一达林顿三极管的基极与限流电阻的一端连接在一起，限流电阻的另一端与主电源回路的比较器输出端连接在一起。主回路二十四伏整流电源中的电解电容正极与备用回路隔离二极管的负极连接在一起，在直流十二伏稳压单元的输出端与接地点间串联有备用回路第一分压电阻和备用回路第二分压电阻，备用回路第一分压电阻与备用回路第二分压电阻连接处与备用回路比较器输入正端连接，在直流十二伏稳压单元的输出端与接地点间串联有备用回路延时电阻和备用回路延时电容，备用回路延时电阻与备用回路延时电容的正极连接处分别与备用回路隔离二极管的正极和备用回路比较器输入负端连接在一起，反相电路的基级与限流电阻的一端连接在一起，限流电阻的另一端与主回路二十四伏整流电源中的电解电容正极连接在一起，反相电路的发射极与直流十二伏稳压单元的输出端连接在一起，反相电路的集电极分别与限流电阻的一端、延时电阻的一端和主回路隔离二极管的负极连接在一起，限流电阻的另一端与地连接在一起，在主回路隔离二极管的正极分别与主回路延时电阻另一端、主回路延时电容正极和主回路比较器的输入端负极连接在一起，主回路延时电容的负极与地连接在一起，在直流十二伏稳压单元的输出端与接地点间串联有主回路第一分压电阻和主回路第二分压电阻，主回路第一分压电阻与主回路第二分压电阻的连接点处连接有主回路比较器的正极。The present invention solves the above technical problems through the following technical solutions: a dual power delay control double interlocking AC stabilized power supply box with anti-interference function, including a main power step-down transformer, a backup power step-down transformer, and a main power contact and the backup power contactor, one end of the 127V output winding of the main power step-down transformer is connected to one end of the contact control coil of the main power contactor and the input end of the first normally open contact of the main power contactor, respectively. The other end of the contact control coil of the main power contactor is connected to the common contact of the third relay, and the other end of the 127V output winding of the main power step-down transformer is in contact with the normally open contact of the second relay and the main power supply respectively. The input terminals of the second normally open contact of the main power contactor are connected together, the normally closed contact of the third relay is connected with the common contact of the second relay, and the input terminal of the normally closed contact of the main power contactor is connected with the backup power supply. The output terminals of the second normally open contact of the contactor are connected together, and the output terminal of the normally closed contact of the main power contactor is respectively connected with the second normally open contact output terminal of the main power contactor and the primary side of the regulated power transformer. One end of the windings is connected together, and the output end of the normally closed contact of the backup power contactor is connected to the output end of the first normally open contact of the backup power contactor and the other end of the primary side winding of the regulated power transformer. The output end of the first normally open contact of the main power contactor is connected to the input end of the normally closed contact of the backup power contactor, and one end of the 127V output winding of the backup power step-down transformer is connected to the contact of the backup power contactor. One end of the control coil is connected to the input end of the first normally open contact of the backup power contactor, and the other end of the contact control coil of the backup power contactor is connected to the common contact of the first relay. The other end of the 127V output winding of the voltage transformer is connected to the normally open contact of the fourth relay and the input end of the second normally open contact of the backup power contactor. The normally closed contact of the first relay is connected to the input end of the fourth relay. The common contacts of the voltage-stabilizing power transformer are connected together, one end of the secondary-side output winding of the voltage-stabilizing power transformer is connected to one end of the power output terminal, and the other end of the secondary-side output winding of the voltage-stabilizing power transformer is connected to one end of the resonant winding of the voltage-stabilizing power transformer. Together, the two ends of the resonant winding of the voltage-stabilizing power transformer are connected with a series resonant capacitor and a resonant inductor. The middle tap of the resonant winding of the voltage-stabilizing power transformer is connected with the other end of the power output end. The twenty-fourth part of the main power step-down transformer is connected together. The 24-volt control output terminal is connected to the input terminal of the 24-volt rectified power supply of the main power circuit, and the 24-volt control output terminal of the backup power step-down transformer is connected to the input terminal of the 24-volt rectified power supply of the backup power circuit. Together, the output terminal of the 24-volt rectified power supply of the main power circuit is connected to the output terminal of the 24-volt rectified power supply of the backup power circuit and the input terminal of the 12-volt DC voltage stabilizing unit respectively. The 12-volt DC voltage The output end of the voltage stabilizing unit is connected to one end of the control coil of the third relay, one end of the control coil of the fourth relay, one end of the control coil of the first relay and one end of the control coil of the second relay respectively. The third relay The other end of the control coil is connected to the other end of the control coil of the fourth relay and the emitter of the second Darlington transistor respectively. The collector of the second Darlington transistor is grounded, and the base of the second Darlington transistor is connected to the current limiting One end of the resistor is connected together, the other end of the current limiting resistor is connected together with the output end of the comparator of the backup power circuit, and the other end of the control coil of the first relay is respectively connected with the other end of the control coil of the second relay and the first The emitters of the Darlington transistors are connected together, the collector of the first Darlington transistor is connected to ground, the base of the first Darlington transistor is connected to one end of the current-limiting resistor, and the current-limiting resistor is The other end is connected to the comparator output of the main power circuit. The positive electrode of the electrolytic capacitor in the main circuit 24-volt rectifier power supply is connected to the negative electrode of the backup circuit isolation diode. The first voltage dividing resistor of the backup circuit and the backup circuit are connected in series between the output end of the 12-volt DC voltage stabilizing unit and the ground point. The second voltage-dividing resistor of the loop, the connection point between the first voltage-dividing resistor of the backup loop and the second voltage-dividing resistor of the backup loop is connected to the input positive end of the backup loop comparator, and is connected in series between the output end of the DC twelve-volt voltage stabilizing unit and the ground point. There is a backup loop delay resistor and a backup loop delay capacitor. The positive connection points of the backup loop delay resistor and the backup loop delay capacitor are respectively connected to the positive pole of the backup loop isolation diode and the negative terminal of the backup loop comparator input, and are inverted. The base of the circuit is connected to one end of the current-limiting resistor, the other end of the current-limiting resistor is connected to the positive electrode of the electrolytic capacitor in the 24-volt rectifier power supply of the main circuit, and the emitter of the inverting circuit is connected to the 12-volt DC stable The output terminals of the voltage unit are connected together. The collector of the inverting circuit is connected to one end of the current-limiting resistor, one end of the delay resistor and the negative electrode of the main circuit isolation diode. The other end of the current-limiting resistor is connected to the ground. , the positive electrode of the main loop isolation diode is connected to the other end of the main loop delay resistor, the positive electrode of the main loop delay capacitor and the negative electrode of the input end of the main loop comparator. The negative electrode of the main loop delay capacitor is connected to the ground. The first voltage dividing resistor of the main circuit and the second voltage dividing resistor of the main circuit are connected in series between the output end of the twelve-volt DC voltage stabilizing unit and the ground point. The connection between the first voltage dividing resistor of the main circuit and the second voltage dividing resistor of the main circuit is The positive pole of the main circuit comparator is connected to the point.
本发明总的发明思路是将计算机的软件功能硬件化，从而大大提高了系统的可靠性。本发明的双电源切换及双重互锁也保证了用电设备免受两路电源同时供电的事故的发生，为增加双电源的安全性和可靠性，在两路控制信号回路上分别设计了双电源切换延时电路，在控制信号00、01、10的切换控制中实现两路电源中原先工作的一路先断电，需切换的另一路要延时3秒后再上电，即主电源工作的切换时序为10（主电源工作）→00（切换00后保持3秒）→01（再切换至备用电源工作），备用电源工作的切换时序为01（备用电源工作）→00（切换00后保持3秒）→10（再切换至主电源工作），其延时时间可调，从而避免了两路电源切换太快（因电感效应）造成的电压叠加，保护用电设备免受损坏。The general idea of the present invention is to harden the software functions of the computer, thereby greatly improving the reliability of the system. The dual power supply switching and double interlocking of the present invention also ensure that electrical equipment is protected from accidents in which two power supplies are powered at the same time. In order to increase the safety and reliability of the dual power supplies, dual power supplies are designed on the two control signal loops. Power switching delay circuit, in the switching control of control signals 00, 01, 10, realizes that the original working one of the two power supplies is powered off first, and the other one that needs to be switched is delayed for 3 seconds before being powered on, that is, the main power supply is working The switching sequence is 10 (main power supply working) → 00 (hold for 3 seconds after switching to 00) → 01 (then switch to backup power supply), and the switching timing of the backup power supply is 01 (standby power supply working) → 00 (after switching to 00) Hold for 3 seconds) → 10 (then switch to main power supply), the delay time is adjustable, thus avoiding voltage superposition caused by the two power supplies switching too fast (due to inductance effect), and protecting electrical equipment from damage.
本发明通过采用双电源接触器触点互锁和双电源线圈互锁的双重互锁和延时，避免了电源切换速度过快（因电感效应）形成的瞬时高电压与切入电压叠加而冲击用电设备，造成用电设备损坏，保证了电源箱安全、可靠的运行。By adopting double interlocking and delay of dual power contactor contact interlocking and dual power coil interlocking, the present invention avoids the impact caused by the superposition of the instantaneous high voltage and the cut-in voltage caused by the power switching speed being too fast (due to the inductance effect). electrical equipment, causing damage to electrical equipment and ensuring the safe and reliable operation of the power box.
附图说明Description of the drawings
图1是本发明的结构示意图。Figure 1 is a schematic structural diagram of the present invention.
具体实施方式Detailed ways
下面结合附图对本发明进行详细说明：一种具有抗干扰功能的双电源延时控制双互锁交流稳压电源箱，包括主电源降压变压器1、备用电源降压变压器2、主电源接触器3和备用电源接触器4，主电源降压变压器1的127V输出绕组的一端分别与主电源接触器3的触点控制线圈的一端和主电源接触器3的第一常开触点的输入端连接在一起，主电源接触器3的触点控制线圈的另一端与第三继电器15的公共触点连接在一起，主电源降压变压器1的127V输出绕组的另一端分别与第二继电器14的常开触点和主电源接触器3的第二常开触点的输入端连接在一起，第三继电器15的常闭触点与第二继电器14的公共触点连接在一起，主电源接触器3的常闭触点的输入端与备用电源接触器4的第二常开触点的输出端连接在一起，主电源接触器3的常闭触点的输出端分别与主电源接触器3的第二常开触点输出端和稳压电源变压器一次侧绕组5的一端连接在一起，备用电源接触器4的常闭触点的输出端分别与备用电源接触器4的第一常开触点的输出端和稳压电源变压器一次侧绕组5的另一端连接在一起，主电源接触器3的第一常开触点的输出端与备用电源接触器4的常闭触点的输入端连接在一起，备用电源降压变压器2的127V输出绕组的一端与备用电源接触器4的触点控制线圈的一端及备用电源接触器4的第一常开触点的输入端连接在一起，备用电源接触器4的触点控制线圈的另一端与第一继电器13的公共触点连接在一起，备用电源降压变压器2的127V输出绕组的另一端分别与第四继电器16的常开触点和备用电源接触器4的第二常开触点的输入端连接在一起，第一继电器13的常闭触点与第四继电器16的公共触点连接在一起，稳压电源变压器二次侧输出绕组6的一端与电源输出端10的一端连接在一起，稳压电源变压器二次侧输出绕组6的另一端与稳压电源变压器谐振绕组7的一端连接在一起，稳压电源变压器谐振绕组7的两端连接有串联的谐振电容8和谐振电感9，稳压电源变压器谐振绕组7的中间抽头与电源输出端10的另一端连接在一起，主电源降压变压器1的二十四伏控制输出端与主电源回路的二十四伏整流电源12的输入端连接在一起，备用电源降压变压器2的二十四伏控制输出端与备用电源回路的二十四伏整流电源11的输入端连接在一起，主电源回路的二十四伏整流电源12的输出端分别与备用电源回路的二十四伏整流电源11的输出端和直流十二伏稳压单元32的输入端连接在一起，直流十二伏稳压单元32的输出端分别与第三继电器15的控制线圈的一端、第四继电器16的控制线圈的一端、第一继电器13的控制线圈的一端和第二继电器14的控制线圈的一端连接在一起，第三继电器15的控制线圈另一端分别与第四继电器16的控制线圈另一端和第二达林顿三极管18的发射极连接，第二达林顿三极管18的集电极接地，第二达林顿三极管18的基极与第二限流电阻34的一端连接在一起，第二限流电阻34的另一端与备用电源回路的比较器25的输出端连接在一起，第一继电器13的控制线圈的另一端分别与第二继电器14的控制线圈的另一端和第一达林顿三极管17的发射极连接在一起，第一达林顿三极管17的集电极极与地连接在一起，第一达林顿三极管17的基极与第一限流电阻33的一端连接在一起，第一限流电阻33的另一端与主电源回路的比较器31输出端连接在一起。The invention will be described in detail below with reference to the accompanying drawings: a dual power delay controlled double interlocking AC stabilized power supply box with anti-interference function, including a main power step-down transformer 1, a backup power step-down transformer 2, and a main power contactor 3 and the backup power contactor 4. One end of the 127V output winding of the main power step-down transformer 1 is connected to one end of the contact control coil of the main power contactor 3 and the input end of the first normally open contact of the main power contactor 3 respectively. connected together, the other end of the contact control coil of the main power contactor 3 is connected with the common contact of the third relay 15, and the other end of the 127V output winding of the main power step-down transformer 1 is connected with the second relay 14 respectively. The normally open contact and the input end of the second normally open contact of the main power contactor 3 are connected together, the normally closed contact of the third relay 15 is connected together with the common contact of the second relay 14, and the main power contactor The input end of the normally closed contact of 3 is connected with the output end of the second normally open contact of the backup power contactor 4, and the output end of the normally closed contact of the main power contactor 3 is respectively connected with the output end of the main power contactor 3. The second normally open contact output terminal is connected to one end of the primary winding 5 of the regulated power transformer, and the output terminal of the normally closed contact of the backup power contactor 4 is respectively connected to the first normally open contact of the backup power contactor 4 The output end of the main power contactor 3 is connected to the other end of the primary side winding 5 of the regulated power supply transformer. The output end of the first normally open contact of the main power contactor 3 is connected to the input end of the normally closed contact of the backup power contactor 4. Together, one end of the 127V output winding of the backup power step-down transformer 2 is connected to one end of the contact control coil of the backup power contactor 4 and the input end of the first normally open contact of the backup power contactor 4, and the backup power contact The other end of the contact control coil of the device 4 is connected with the common contact of the first relay 13, and the other end of the 127V output winding of the backup power step-down transformer 2 is connected with the normally open contact of the fourth relay 16 and the backup power supply respectively. The input terminals of the second normally open contact of the contactor 4 are connected together, the normally closed contact of the first relay 13 and the common contact of the fourth relay 16 are connected together, and the secondary side output winding 6 of the voltage-stabilized power transformer is connected together. One end is connected to one end of the power output terminal 10, the other end of the secondary side output winding 6 of the voltage stabilizing power transformer is connected to one end of the resonant winding 7 of the voltage stabilizing power transformer, and the two ends of the resonant winding 7 of the voltage stabilizing power transformer are connected together. There are resonant capacitors 8 and resonant inductors 9 connected in series. The middle tap of the resonant winding 7 of the voltage-stabilizing power supply transformer is connected to the other end of the power supply output terminal 10. The 24-volt control output terminal of the main power supply step-down transformer 1 is connected to the main power supply. The input terminals of the twenty-four-volt rectified power supply 12 of the loop are connected together, and the twenty-four-volt control output terminal of the backup power step-down transformer 2 is connected together with the input terminal of the twenty-four-volt rectified power supply 11 of the backup power supply circuit. The output end of the twenty-four-volt rectified power supply 12 of the power loop is connected to the output end of the twenty-four-volt rectified power supply 11 of the backup power loop and the input end of the twelve-volt DC stabilizing unit 32 respectively. The twelve-volt DC stabilizing unit The output end of the pressure unit 32 is connected to one end of the control coil of the third relay 15, one end of the control coil of the fourth relay 16, one end of the control coil of the first relay 13 and one end of the control coil of the second relay 14 respectively. , the other end of the control coil of the third relay 15 is connected to the other end of the control coil of the fourth relay 16 and the emitter of the second Darlington transistor 18 respectively. The collector of the second Darlington transistor 18 is grounded, and the second Darlington transistor 18 is grounded. The base of the Dayton transistor 18 is connected to one end of the second current limiting resistor 34, the other end of the second current limiting resistor 34 is connected to the output end of the comparator 25 of the backup power circuit, and the control coil of the first relay 13 The other end is connected to the other end of the control coil of the second relay 14 and the emitter of the first Darlington transistor 17 respectively. The collector of the first Darlington transistor 17 is connected to the ground. The first Darlington transistor 17 is connected to the ground. The base of the Linden transistor 17 is connected to one end of the first current limiting resistor 33, and the other end of the first current limiting resistor 33 is connected to the output end of the comparator 31 of the main power circuit.
主回路二十四伏整流电源12中的电解电容正极与备用回路隔离二极管20的负极连接在一起，在直流十二伏稳压单元32的输出端与接地点间串联有备用回路第一分压电阻23和备用回路第二分压电阻24，备用回路第一分压电阻23与备用回路第二分压电阻24连接处与备用回路比较器25输入正端连接，在直流十二伏稳压单元32的输出端与接地点间串联有备用回路延时电阻22和备用回路延时电容21，备用回路延时电阻22与备用回路延时电容21的正极连接处分别与备用回路隔离二极管20的正极和备用回路比较器25输入负端连接在一起，反相电路19的基级与第四限流电阻36的一端连接在一起，第四限流电阻36的另一端与主回路二十四伏整流电源12中的电解电容正极连接在一起，反相电路19的发射极与直流十二伏稳压单元32的输出端连接在一起，反相电路19的集电极分别与第三限流电阻35的一端、延时电阻27的一端和主回路隔离二极管26的负极连接在一起，第三限流电阻35的另一端与地连接在一起，在主回路隔离二极管26的正极分别与主回路延时电阻27另一端、主回路延时电容28正极和主回路比较器31的输入端负极连接在一起，主回路延时电容28的负极与地连接在一起，在直流十二伏稳压单元32的输出端与接地点间串联有主回路第一分压电阻29和主回路第二分压电阻30，主回路第一分压电阻29与主回路第二分压电阻30的连接点处连接有主回路比较器31的正极。The positive electrode of the electrolytic capacitor in the main circuit 24-volt rectifier power supply 12 is connected to the negative electrode of the backup circuit isolation diode 20. The first voltage divider of the backup circuit is connected in series between the output end of the 12-volt DC voltage stabilizing unit 32 and the ground point. Resistor 23 and the second voltage dividing resistor 24 of the backup circuit. The connection between the first voltage dividing resistor 23 of the backup circuit and the second voltage dividing resistor 24 of the backup circuit is connected to the input positive terminal of the backup circuit comparator 25. In the DC twelve-volt voltage stabilizing unit There is a backup loop delay resistor 22 and a backup loop delay capacitor 21 connected in series between the output end of 32 and the ground point. The positive electrode connections of the backup loop delay resistor 22 and the backup loop delay capacitor 21 are respectively connected with the positive electrode of the backup loop isolation diode 20. The input negative terminal of the backup loop comparator 25 is connected together, the base of the inverter circuit 19 is connected to one end of the fourth current limiting resistor 36, and the other end of the fourth current limiting resistor 36 is connected to the main circuit 24-volt rectifier. The anodes of the electrolytic capacitors in the power supply 12 are connected together, the emitter of the inverter circuit 19 is connected to the output end of the DC twelve-volt stabilizing unit 32, and the collector of the inverter circuit 19 is connected to the third current limiting resistor 35 respectively. One end of the delay resistor 27 and the cathode of the main circuit isolation diode 26 are connected together, the other end of the third current limiting resistor 35 is connected to the ground, and the anode of the main circuit isolation diode 26 is connected to the main circuit delay resistor respectively. The other end of 27, the positive pole of the main loop delay capacitor 28 and the negative pole of the input terminal of the main loop comparator 31 are connected together. The negative pole of the main loop delay capacitor 28 is connected to the ground. At the output of the DC twelve-volt voltage stabilizing unit 32 The first main circuit voltage dividing resistor 29 and the main circuit second voltage dividing resistor 30 are connected in series between the terminal and the ground point. The main circuit is connected to the connection point between the main circuit first voltage dividing resistor 29 and the main circuit second voltage dividing resistor 30. The positive terminal of comparator 31.
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| CN112702049B (en) * | 2020-12-30 | 2025-05-30 | 贵州西南工具(集团)有限公司 | A machine tool delayed start circuit with adjustable delay time |
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