WO2019019082A1 - Method and system for detecting switch adhesion of output end of power module - Google Patents

Method and system for detecting switch adhesion of output end of power module Download PDF

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Publication number
WO2019019082A1
WO2019019082A1 PCT/CN2017/094641 CN2017094641W WO2019019082A1 WO 2019019082 A1 WO2019019082 A1 WO 2019019082A1 CN 2017094641 W CN2017094641 W CN 2017094641W WO 2019019082 A1 WO2019019082 A1 WO 2019019082A1
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WIPO (PCT)
Prior art keywords
switch
voltage
resistor
detecting
module
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PCT/CN2017/094641
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French (fr)
Chinese (zh)
Inventor
戴国峰
邓纯发
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深圳驿普乐氏科技有限公司
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Priority to PCT/CN2017/094641 priority Critical patent/WO2019019082A1/en
Publication of WO2019019082A1 publication Critical patent/WO2019019082A1/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327Testing of circuit interrupters, switches or circuit-breakers

Definitions

  • the present invention relates to the field of power supply, and in particular, to a method and system for detecting adhesion of a switch at an output end of a power module.
  • the output of the DC module is connected with the DC bus and the DC contactor is commonly used to disconnect.
  • the DC contactor is a kind of voltage that can cut off the voltage.
  • the current switching device has the advantages of simple structure and convenient control, but its disadvantage is that when the large current is cut off, the two ends of the contacts may be stuck due to the spark generated by the arcing, and the two ends may not be effectively disconnected, thereby causing system failure and serious Personal safety incidents may occur.
  • the contactor's solution is to add a set of auxiliary contacts that act synchronously with the main contact for the main contact glue feedback.
  • each DC contactor has a set of auxiliary contacts (K1AOF, K1BOF).
  • K1AOF, K1BOF K1AOF, K1BOF
  • the auxiliary contact of the contactor is synchronized with the main contact, and the control system determines the state of the DC contactor by detecting the state of the auxiliary contact, if the state of the auxiliary contact and the state of the primary auxiliary point are detected Inconsistent, an alarm.
  • the disadvantage of this type of detection method is that each DC contactor must have a set of auxiliary contacts, while DC contactors with auxiliary contacts are much more expensive than DC contactors without auxiliary contacts.
  • RELAY (relay) is usually used instead of DC contactor, but RELAY has no auxiliary contacts. It is difficult to detect whether the main contact of RELAY is stuck.
  • the invention mainly provides a method and a system for detecting adhesion of a switch of an output end of a power module, which does not require an auxiliary contact switch and has low cost.
  • an embodiment provides a method for detecting adhesion of a switch of an output of a power module.
  • the system includes: at least one power module for supplying power to the load, at least one first switch module, a detecting resistor, a control module, and a voltage sampling module for detecting the voltage of the detecting resistor;
  • the first switch module includes the first a switch and a first resistor in parallel with the first switch;
  • the output end of the power module, the first switch module and the detecting resistor are connected in series;
  • the control module controls opening and closing of the first switch, and determines whether the first switch is stuck according to a voltage of the detecting resistor when the first switch is turned off.
  • an embodiment provides a method for detecting adhesion of a switch of an output of a power module, including the following steps:
  • the voltage sampling module detects the voltage of the detecting resistor
  • the control module controls the first switch to be turned off; determining whether the first switch is stuck according to the voltage of the detecting resistor when the first switch is turned off.
  • the adhesion of the first switch affects the voltage of the detecting resistor, thereby detecting the The voltage of the detecting resistor when the first switch is turned off is used to judge whether the first switch is stuck or not, and the auxiliary contact switch is not needed, thereby achieving low cost and improving the safety of the system.
  • FIG. 1 is a circuit diagram of a conventional contactor adhesion detecting circuit
  • Embodiment 2 is a schematic circuit diagram of Embodiment 1 in a system for detecting adhesion of an output terminal of a power module according to the present invention
  • Embodiment 3 is a schematic circuit diagram of Embodiment 2 in a system for detecting adhesion of a switch of an output end of a power module according to the present invention
  • FIG. 4 is a flow chart of a method for detecting adhesion of a switch at an output end of a power module according to the present invention.
  • the system (circuit) for detecting the adhesion of the output end of the power module module includes: at least one power module 20 for supplying power to the load, at least one first switch module (circuit) 30, and a detecting resistor. Ry, a load switch K1, a control module 10, and a voltage sampling module (circuit) 50 for detecting the voltage of the detecting resistor Ry.
  • the first switch module 30 includes a first switch KA and a first resistor Ra connected in parallel with the first switch KA.
  • the power module 20 and the first switch module 30 are provided with N, that is, N power modules 20 (power modules 1-N), N first switches KA (K1A-KNA), and N first resistors.
  • Ra Ra (R1a-Rna); a power module 20 is correspondingly connected to a first switch module 30, where N is an integer greater than or equal to 1.
  • the power module 20 uses a DC module, that is, outputs DC power.
  • the output end of the power module 20, the corresponding first switch module 30 and the detecting resistor Ry are connected in series. Specifically, an output end of the power module 20 is connected to the power positive bus or the power negative bus through the first switch module 30, and the detecting resistor Ry is connected in series between the positive power bus and the negative power bus.
  • the two sampling inputs of the voltage sampling module 50 are respectively connected to two ends of the detecting resistor Ry, and the output of the voltage sampling module 50 is connected to the input end of the control module 10.
  • An output of the control module 10 is connected to the control terminal of the first switch KA.
  • the positive power bus of the power supply is the positive line DC+ of the DC bus
  • the negative power line of the power supply is the negative line DC- of the DC bus
  • the positive and negative lines are connected to the load 60.
  • the first switch KA is a relay switch
  • the control end of the first switch KA is a coil of the relay.
  • the voltage sampling module 50 samples the voltage of the detecting resistor Ry, and can adopt conventional electricity. Pressure sampling circuit.
  • the load switch K1 is used to control the power supply of the load 60.
  • the load switch K1 is disposed on the positive line DC+ of the DC bus or the negative line DC- of the DC bus between the detecting resistor Ry and the load 60, and is set in this embodiment. On the positive line DC+ of the DC bus.
  • the control module 10 is used to control the opening and closing (switching) of the first switch KA, and of course can also be used to control the opening and closing of the load switch K1; before the load switch K1 is closed, the power bus is included (including All the first switches KA on the power positive bus and the negative power bus of the power supply perform adhesion detection, and after determining that the first switch KA is not stuck, the load switch K1 is closed.
  • the adhesion detection specifically includes: the control module 10 determining whether the first switch KA is stuck according to the voltage of the detecting resistor Ry when the first switch KA is turned off.
  • the adhesion of the first switch KA affects the voltage of the detecting resistor Ry, that is, the first switch KA is closed to open, and if adhesion occurs, the process is in progress.
  • the voltage of Ry does not change significantly. Therefore, by detecting the voltage of the detecting resistor Ry when the first switch KA is turned off, it is determined whether the first switch KA is stuck or not, and the auxiliary contact switch is not needed, thereby achieving low cost and improving the system. safety.
  • control module 10 may employ a single chip microcomputer (MCU), which includes a driving unit and a comparison determining unit.
  • MCU microcomputer
  • the drive unit is for controlling the opening and closing of the first switch KA.
  • the comparison judging unit is configured to control the opening and closing of the first switch KA by the driving unit; before the load switch K1 is closed, first perform adhesion detection on all the first switches KA on the power bus, and determine all the first After the switch KA is not stuck, the load switch K1 is closed.
  • the comparison determining unit activates the power module 1, detects whether the first switch K1A between the module and the bus is stuck, and turns off the power module 1 after detecting; starts the power module 2, and detects the number between the module and the bus. Whether a switch K2A has adhesive or not, after the detection, the power module 2 is turned off; ...; the power module N is activated, and the first switch KNA between the module and the bus is detected to be non-adhesive, and the power module N is turned off after the detection; When K1A, K2A, ..., KNA are normal, the load switch K1 is closed according to user needs or system requirements, and one, multiple or all power modules are selected to power the load 60.
  • the comparison determining unit performs the adhesion detection on the first switch KA, specifically: determining whether the first resistor Ra is short-circuited according to the voltage of the detecting resistor Ry when the first switch KA is turned off, if the first resistor Ra is still in the The short circuit state indicates that the first switch KA is stuck, and an instruction (error) for triggering the first switch KA to be stuck with the alarm prompt is output.
  • the system also includes an alarm module for receiving comparative judgments The unit outputs an instruction to emit an audible, optical or electrical alarm to prompt the user to stick the first switch KA.
  • the driving unit is connected to the control end of the first switch KA, and the input end of the comparison determining unit is connected to the output end of the voltage sampling module 50.
  • the adhesion detection of the comparison determination unit is specifically: comparing whether the voltage of the detection resistor Ry when the first switch KA is off is close to the first preset voltage, and the first switch KA is considered not to be adhered when approaching, and the output is The first switch KA is not glued.
  • the first preset voltage is Where R y is the resistance of the sense resistor.
  • V 1 is the output voltage of the power module 20.
  • Whether the voltage of the detecting resistor Ry when the first switch KA is turned off is close to the first preset voltage may be determined by comparing, for example, comparing the voltage of the detecting resistor Ry when the first switch KA is turned off and the first The difference between the preset voltages is considered to be unbonded when the difference does not exceed the preset first difference range.
  • the difference between the voltage of the detecting resistor Ry when the first switch KA is turned off and V 1 may be compared, and when the difference does not exceed the preset first difference range, the first switch KA is considered to be sticky. Even, the instruction to stick the first switch KA is output.
  • the first difference range is plus or minus 10% of the first preset voltage, that is, Theoretically, the first difference range should be close to 0. Considering the error of the resistance, the positive and negative tenths of the first preset voltage are selected. Preferably, the first difference range may be set to be plus or minus 5% of the first preset voltage.
  • the system provided by the present invention determines whether the RELAY has adhesion by using the resistance voltage dividing principle to sample the two-terminal voltage of the resistor at the second end of the RELAY, and replaces the contactor with the RELAY and has the RELAY contact adhesion detection function.
  • the magnitude reduces costs.
  • the system further includes at least one second switch module 40, the second switch module 40 including a second switch KB and a second resistor Rb in parallel with the second switch KB.
  • the power module 20, the first switch module 30, and the second switch module 40 are provided with N, that is, N power modules 20 (power modules 1-N), and N first switches KA (K1A-KNA) , N first resistors Ra (R1a-Rna), N second switches KB (K1B-KNB), N second resistors Rb (R1b-Rnb); one power module 20 is connected to a first switch module 30 and a second switch module 40, Where N is an integer greater than or equal to 1.
  • the power module 20 uses a DC module, that is, outputs DC power.
  • the positive output terminal of the power module 20 is connected to the positive power bus of the power supply through the first switch KA and the first resistor Ra.
  • the positive power bus of the power supply is connected to the negative power bus of the power supply through the detecting resistor Ry, and the negative power bus of the power supply passes through the second switch KB and the second resistor.
  • Rb is connected to the negative output terminal of the power module 20.
  • the negative output terminal of the power module 20 is grounded.
  • the two sampling inputs of the voltage sampling module 50 are respectively connected to two ends of the detecting resistor Ry, and the output of the voltage sampling module 50 is connected to the input end of the control module 10.
  • the positive power bus of the power supply is the positive line DC+ of the DC bus
  • the negative power line of the power supply is the negative line DC- of the DC bus
  • the positive and negative lines are connected to the load 60.
  • the first switch KA and the second switch KB are both relay switches
  • the control ends of the first switch KA and the second switch KB are the coils of the relay.
  • the load switch K1 is used to control the power supply of the load 60.
  • the load switch K1 is disposed on the positive line DC+ of the DC bus or the negative line DC- of the DC bus between the detecting resistor Ry and the load 60, and is set in this embodiment. On the positive line DC+ of the DC bus.
  • the control module 10 is configured to control the opening and closing (switching) of the first switch KA and the second switch KB, and of course can also be used to control the opening and closing of the load switch K1; before the load switch K1 is closed, Performing adhesion detection on all the first switch KA and the second switch KB on the power bus (including the power positive bus and the negative power bus), and then closing the first switch KA and the second switch KB after the first switch KA and the second switch KB are not adhered Load switch K1.
  • the adhesion detection specifically includes: the control module 10 determining whether the first switch KA is stuck according to the voltage of the detecting resistor Ry when the first switch KA is turned off, according to the detecting resistor Ry being in the second switch KB The voltage at the time of disconnection determines whether the second switch KB is stuck.
  • the adhesion detection of the first switch KA and the second switch KB by the control module 10 may be performed separately or simultaneously; when separately, the switch that does not need to be detected is closed, and the switch that needs to be detected is turned off for detection. The process has been described in detail in the previous embodiment and will not be described herein.
  • This embodiment mainly describes the adhesion detection of the first switch KA and the second switch KB at the same time. In other words, the first switch KA and the second switch KB are linked.
  • An output of the control module 10 is connected to the control terminal of the first switch KA and the control terminal of the second switch KB.
  • control module 10 includes a driving unit and a comparison determining unit.
  • This embodiment uses two switches to control the output of the power module 20.
  • the drive unit is used for The opening and closing of the first switch KA and the second switch KB are controlled.
  • the comparison judging unit is configured to control opening and closing of the first switch KA and the second switch KB by the driving unit; before the load switch K1 is closed, first all the first switch KA and the second switch KB on the power bus The adhesion detection is performed, and after the first switch KA and the second switch KB are judged to be unbonded, the load switch K1 is closed.
  • the comparison determining unit activates the power module 1, detects whether the first switch K1A and the second switch K1B between the module and the bus are stuck, and turns off the power module 1 after detecting; starts the power module 2, detects the module and Whether the first switch K2A and the second switch K2B between the buses are stuck, and after the detection, the power module 2 is turned off; ...; the power module N is activated, and the first switch KNA and the second switch between the module and the bus are detected.
  • KNB has no adhesion, after the detection, turn off the power module N; when K1A, K1B, ..., KNA, KNB are normal, according to user needs or system needs, close the load switch K1, and choose to start one or more groups or All power modules supply power to load 60.
  • the comparison determining unit performs adhesion detection on the first switch KA and the second switch KB, specifically: determining whether the first resistor Ra is short-circuited according to the voltage of the detecting resistor Ry when the first switch KA is turned off. When the resistance Ra is still in the short circuit state, the first switch KA is stuck, and the command for triggering the first switch KA to be stuck with the alarm prompt is output; and the voltage is determined according to the voltage of the detecting resistor Ry when the second switch KB is turned off. Whether the two resistors Rb are short-circuited, and if the second resistor Rb is still in a short-circuit state, an instruction for triggering the second switch KB sticking alarm prompt is output.
  • the system further includes an alarm module for receiving an instruction output by the comparison determination unit to issue an audible, optical or electrical alarm to prompt the user to stick the first switch KA and/or the second switch KB.
  • the driving unit is connected to the control end of the first switch KA and the control end of the second switch KB, and the input end of the comparison determining unit is connected to the output end of the voltage sampling module.
  • the drive unit is also connected to the comparison determination unit.
  • the adhesion detection of the comparison determination unit is specifically: comparing the difference between the voltage of the detection resistor Ry when the first switch KA and the second switch KB are disconnected and the first preset voltage, where the difference is not When the preset first difference range is exceeded, an instruction that the first switch KA and the second switch KB are not stuck is output.
  • the first difference range is plus or minus 10% of the corresponding preset voltage, in other words, the first difference range is Preferably, the first difference range is plus or minus 5% of the first preset voltage.
  • the comparison determining unit compares a difference between a voltage of the detecting resistor Ry when the first switch KA and the second switch KB is turned off and a second preset voltage, where the difference does not exceed a preset second difference.
  • the second preset voltage is
  • R total 2 is the total resistance of the loop formed by the output end of the power module 20 when the first switch KA is completely disconnected and the second switch KB is closed.
  • R total 2 Ra + Ry.
  • the second difference range is plus or minus 10% of the corresponding preset voltage, in other words, the second difference range is Preferably, the second difference range is plus or minus 5% of the second preset voltage.
  • the comparison determining unit compares a difference between a voltage of the detecting resistor Ry when the first switch KA and the second switch KB is turned off and a third preset voltage, where the difference does not exceed a preset third difference.
  • the third preset voltage is
  • R total 3 is the total resistance of the loop formed by the power module output terminal when the first switch KA is closed and the second switch KB is completely disconnected.
  • R total 3 Rb + Ry.
  • the third difference range is plus or minus 10% of the corresponding preset voltage, in other words, the third difference range is Preferably, the third difference range is plus or minus 5% of the third preset voltage.
  • the resistances of the first resistor Ra and the second resistor Rb may be the same or different. If the resistances of the first resistor Ra and the second resistor Rb are the same, the second preset voltage and the third preset voltage are the same, and only the One of the first switch KA and the second switch KB is stuck, and it is impossible to determine which of the switches is stuck. Therefore, in the present embodiment, the resistances of the first resistor Ra and the second resistor Rb are different.
  • the comparison determining unit compares a difference between a voltage of the detecting resistor Ry when the first switch KA and the second switch KB is disconnected and a voltage output by the power module, where the difference does not exceed a preset fourth difference.
  • a preset fourth difference In the range, an instruction for triggering the first switch KA and the second switch KB to be attached to the alarm prompt is output.
  • the fourth difference range is plus or minus 10% of the corresponding preset voltage. In other words, the fourth difference range is -0.1 ⁇ V 1 to 0.1 ⁇ V 1 . Preferably, the fourth difference range is plus or minus 5% of the fourth preset voltage.
  • the system provided by the present invention determines the presence or absence of adhesion of the relay switch by using the resistance division principle at the two ends of the relay switch, and using the resistance division principle to sample the two terminals of the resistor, and replaces the contactor with a relay switch and has a relay contact switch. Even the detection function greatly reduces the cost.
  • the present invention further provides a method for detecting the adhesion of the switch of the output end of the power module. As shown in FIG. 4, the method includes the following steps:
  • the control module 10 performs adhesion detection on all the first switches KA on the power bus before the load switch K1 is closed, and then closes the load switch K1 after determining that all the first switches KA are not stuck. Specifically, the control module 10 activates the power module 1, detects whether the first switch K1A between the module and the bus is stuck, and turns off the power module 1 after detecting; starts the power module 2, and detects the number between the module and the bus.
  • a switch K2A has adhesive or not, after the detection, the power module 2 is turned off; ...; the power module N is activated, and the first switch KNA between the module and the bus is detected to be non-adhesive, and the power module N is turned off after the detection;
  • K1A, K2A, ..., KNA are normal, the load switch K1 is closed according to user needs or system requirements, and one, multiple or all power modules are selected to power the load 60.
  • control module 10 performs the adhesion detection on the first switch KA, which specifically includes:
  • the voltage sampling module 50 detects the voltage of the detecting resistor Ry.
  • the control module 10 controls the first switch KA to be disconnected; and determines whether the first switch KA is stuck according to the voltage of the detecting resistor Ry when the first switch KA is turned off.
  • the second switch KB can also be set on the power bus, and the step S10 is: before the load switch K1 is closed, firstly perform adhesion detection on all the first switch KA and the second switch KB on the power bus, in judging After all the first switch KA and the second switch KB are not bonded, the load switch K1 is closed.
  • the comparison determining unit activates the power module 1, detects whether the first switch K1A and the second switch K1B between the module and the bus are stuck, and turns off the power module 1 after detecting; starts the power module 2, detects the module and Whether the first switch K2A and the second switch K2B between the buses are stuck, and after the detection, the power module 2 is turned off; ...; the power module N is activated, and the module is detected between the bus and the bus.
  • the load switch K1 is closed according to user needs or system requirements, and Select to power one, multiple, or all of the power modules to power load 60.
  • control module 10 performs adhesion detection on the first switch KA and the second switch KB, and specifically includes:
  • the voltage sampling module 50 detects the voltage of the detecting resistor Ry.
  • the control module 10 controls the first switch KA and the second switch KB to be disconnected; and determines the first switch KA and the second switch according to the voltage of the detecting resistor Ry when the first switch KA and the second switch KB are turned off. Whether KB sticks. Specifically, the control module 10 determines whether the first resistor Ra is short-circuited according to the voltage of the detecting resistor Ry when the first switch KA is turned off. If the first resistor Ra is still in the short-circuit state, the first switch KA is stuck and outputted.
  • An instruction for triggering the first switch KA to be stuck with the alarm prompt determining whether the second resistor Rb is short-circuited according to the voltage of the detecting resistor Ry when the second switch KB is turned off, and outputting if the second resistor Rb is still in a short-circuit state
  • An instruction to trigger a second switch KB to attach an alert prompt determining whether the second resistor Rb is short-circuited according to the voltage of the detecting resistor Ry when the second switch KB is turned off, and outputting if the second resistor Rb is still in a short-circuit state
  • the program may be stored in a computer readable storage medium, and the storage medium may include: a read only memory, a random access memory, a magnetic disk, an optical disk, a hard disk, etc.
  • the computer executes the program to implement the above functions.
  • the program is stored in the memory of the device, and when the program in the memory is executed by the processor, all or part of the above functions can be realized.
  • the program may also be stored in a storage medium such as a server, another computer, a magnetic disk, an optical disk, a flash disk or a mobile hard disk, and may be saved by downloading or copying.
  • the system is updated in the memory of the local device, or the system of the local device is updated.

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Abstract

A method and system for detecting switch adhesion of the output end of a power module (20). The system comprises at least one power module (20) for powering a load (60), at least one first switch module (30), a sense resistor (Ry), a control module (10), and a voltage sampling module (50) used for detecting the voltage of the sense resistor (Ry). The first switch module (30) comprises a first switch (KA) and a first resistor (Ra) connected in parallel to the first switch (KA); the output end of the power module (20), the first switch module (30), and the sense resistor (Ry) are connected in series; the control module (10) controls on and off of the first switch (KA) and determines whether the first switch (KA) is adhered according to the voltage of the sense resistor (Ry) when the first switch (KA) is turned off. Since the first switch (KA) and the first resistor (Ra) are connected in parallel, whether the first switch (KA) is adhered or not affects the voltage of the sense resistor (Ry), so that whether the first switch (KA) is adhered can be determined by detecting the voltage of the sense resistor (Ry) when the first switch (KA) is turned off, without an auxiliary contact switch, thereby lowering the costs and improving the safety of the system.

Description

一种检测电源模块输出端开关黏连的方法和系统Method and system for detecting adhesion of output switch of power module 技术领域Technical field
本发明涉及供电领域,具体涉及一种检测电源模块输出端开关黏连的方法和系统。The present invention relates to the field of power supply, and in particular, to a method and system for detecting adhesion of a switch at an output end of a power module.
背景技术Background technique
在大功率的电动汽车直流充电桩系统中,一条直流母线上常并联几组直流模块,直流模块的输出与直流母线的连通与分断常用直流接触器来实现,直流接触器是一种能切断电压、电流的开关器件,具有结构简单、控制方便的优点,但其缺点为在切断大电流时,有可能会因为拉弧产生火花导致二端触点粘连,不能有效分断,从而导致系统故障,严重时有可能发生人身安全事故。In the high-power electric vehicle DC charging pile system, several DC modules are often connected in parallel on a DC bus. The output of the DC module is connected with the DC bus and the DC contactor is commonly used to disconnect. The DC contactor is a kind of voltage that can cut off the voltage. The current switching device has the advantages of simple structure and convenient control, but its disadvantage is that when the large current is cut off, the two ends of the contacts may be stuck due to the spark generated by the arcing, and the two ends may not be effectively disconnected, thereby causing system failure and serious Personal safety incidents may occur.
对于触点粘连的问题,接触器产家解决的办法为增加一组与主触点同步动作的辅助触点用于主触点粘连反馈。For the problem of contact sticking, the contactor's solution is to add a set of auxiliary contacts that act synchronously with the main contact for the main contact glue feedback.
如图1所示,直流模块的输出与直流母线DC+、DC-都通过直流接触器(K1A、K1B—KNA、KNB)相连,而每个直流接触器都带一组辅助触点(K1AOF、K1BOF—KNAOF、KNBOF),接触器的辅助触点与主触点同步动作,控制系统通过检测辅助触点的状态来判断直流接触器的状态,如果检测到辅助触点的状态与主辅助点的状态不一致则报警。这种检测方法的缺点为每个直流接触器必须带有一组辅助触点,而带辅助触点的直流接触器比不带辅助触点的直流接触器成本高很多。As shown in Figure 1, the output of the DC module and the DC bus DC+ and DC- are connected by DC contactors (K1A, K1B-KNA, KNB), and each DC contactor has a set of auxiliary contacts (K1AOF, K1BOF). - KNAOF, KNBOF), the auxiliary contact of the contactor is synchronized with the main contact, and the control system determines the state of the DC contactor by detecting the state of the auxiliary contact, if the state of the auxiliary contact and the state of the primary auxiliary point are detected Inconsistent, an alarm. The disadvantage of this type of detection method is that each DC contactor must have a set of auxiliary contacts, while DC contactors with auxiliary contacts are much more expensive than DC contactors without auxiliary contacts.
为了节约成本,通常用RELAY(继电器)代替直流接触器的方法,但RELAY没有辅助触点,要检测RELAY主触点是否黏连比较困难。In order to save costs, RELAY (relay) is usually used instead of DC contactor, but RELAY has no auxiliary contacts. It is difficult to detect whether the main contact of RELAY is stuck.
因此,现有技术还有待改进和提高。Therefore, the prior art has yet to be improved and improved.
发明内容Summary of the invention
本发明主要提供一种检测电源模块输出端开关黏连的方法和系统,无需辅助触点开关,成本低。The invention mainly provides a method and a system for detecting adhesion of a switch of an output end of a power module, which does not require an auxiliary contact switch and has low cost.
根据第一方面,一种实施例中提供一种检测电源模块输出端开关黏连的 系统,包括:至少一个用于给负载供电的电源模块、至少一个第一开关模块、检测电阻、控制模块以及用于检测所述检测电阻电压的电压采样模块;所述第一开关模块包括第一开关和与第一开关并联的第一电阻;According to a first aspect, an embodiment provides a method for detecting adhesion of a switch of an output of a power module. The system includes: at least one power module for supplying power to the load, at least one first switch module, a detecting resistor, a control module, and a voltage sampling module for detecting the voltage of the detecting resistor; the first switch module includes the first a switch and a first resistor in parallel with the first switch;
所述电源模块的输出端、第一开关模块和检测电阻串联连接;The output end of the power module, the first switch module and the detecting resistor are connected in series;
所述控制模块控制第一开关的断开与闭合,根据所述检测电阻在第一开关断开时的电压来判断第一开关是否黏连。The control module controls opening and closing of the first switch, and determines whether the first switch is stuck according to a voltage of the detecting resistor when the first switch is turned off.
根据第二方面,一种实施例中提供一种检测电源模块输出端开关黏连的方法,包括如下步骤:According to a second aspect, an embodiment provides a method for detecting adhesion of a switch of an output of a power module, including the following steps:
电压采样模块检测检测电阻的电压;The voltage sampling module detects the voltage of the detecting resistor;
控制模块控制第一开关断开;根据所述检测电阻在第一开关断开时的电压来判断第一开关是否黏连。The control module controls the first switch to be turned off; determining whether the first switch is stuck according to the voltage of the detecting resistor when the first switch is turned off.
依据上述实施例的检测电源模块输出端开关黏连的方法和系统,由于第一开关和第一电阻并联,故第一开关的黏连与否会影响到检测电阻的电压,从而通过检测所述检测电阻在第一开关断开时的电压来判断第一开关是否黏连,无需辅助触点开关,实现成本低,提高了系统的安全性。According to the method and system for detecting the adhesion of the output end of the power module according to the above embodiment, since the first switch and the first resistor are connected in parallel, the adhesion of the first switch affects the voltage of the detecting resistor, thereby detecting the The voltage of the detecting resistor when the first switch is turned off is used to judge whether the first switch is stuck or not, and the auxiliary contact switch is not needed, thereby achieving low cost and improving the safety of the system.
附图说明DRAWINGS
图1为现有的接触器黏连检测电路的电路示意图;1 is a circuit diagram of a conventional contactor adhesion detecting circuit;
图2为本发明提供的检测电源模块输出端开关黏连的系统中,实施例1的电路示意图;2 is a schematic circuit diagram of Embodiment 1 in a system for detecting adhesion of an output terminal of a power module according to the present invention;
图3为本发明提供的检测电源模块输出端开关黏连的系统中,实施例2的电路示意图;3 is a schematic circuit diagram of Embodiment 2 in a system for detecting adhesion of a switch of an output end of a power module according to the present invention;
图4为本发明提供的检测电源模块输出端开关黏连的方法的流程图。4 is a flow chart of a method for detecting adhesion of a switch at an output end of a power module according to the present invention.
具体实施方式Detailed ways
下面通过具体实施方式结合附图对本发明作进一步详细说明。其中不同实施方式中类似元件采用了相关联的类似的元件标号。在以下的实施方式中,很多细节描述是为了使得本申请能被更好的理解。然而,本领域技术人员可以毫不费力的认识到,其中部分特征在不同情况下是可以省略的,或者可以由其他元件、材料、方法所替代。在某些情况下,本申请相关的一些操作并没有在说明书中显示或者描述,这是为了避免本申请的核心部分被过多的描 述所淹没,而对于本领域技术人员而言,详细描述这些相关操作并不是必要的,他们根据说明书中的描述以及本领域的一般技术知识即可完整了解相关操作。The present invention will be further described in detail below with reference to the accompanying drawings. Similar elements in different embodiments employ associated similar component numbers. In the following embodiments, many of the details are described in order to provide a better understanding of the application. However, those skilled in the art can easily realize that some of the features may be omitted in different situations, or may be replaced by other components, materials, and methods. In some cases, some operations related to this application have not been shown or described in the specification, in order to avoid excessive description of the core part of the application. The description is submerged, and it is not necessary for those skilled in the art to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the field.
另外,说明书中所描述的特点、操作或者特征可以以任意适当的方式结合形成各种实施方式。同时,方法描述中的各步骤或者动作也可以按照本领域技术人员所能显而易见的方式进行顺序调换或调整。因此,说明书和附图中的各种顺序只是为了清楚描述某一个实施例,并不意味着是必须的顺序,除非另有说明其中某个顺序是必须遵循的。In addition, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can also be sequentially changed or adjusted in a manner that can be apparent to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of describing a particular embodiment, and are not intended to
本文中为部件所编序号本身,例如“第一”、“第二”等,仅用于区分所描述的对象,不具有任何顺序或技术含义。而本申请所说“连接”、“联接”,如无特别说明,均包括直接和间接连接(联接)。The serial numbers themselves for the components herein, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. As used herein, "connected" or "coupled", unless otherwise specified, includes both direct and indirect connections (joining).
请参阅图2,本发明提供的检测电源模块输出端开关黏连的系统(电路),包括:至少一个用于给负载供电的电源模块20、至少一个第一开关模块(电路)30、检测电阻Ry、负载开关K1、控制模块10以及用于检测所述检测电阻Ry电压的电压采样模块(电路)50。所述第一开关模块30包括第一开关KA和与第一开关KA并联的第一电阻Ra。Referring to FIG. 2, the system (circuit) for detecting the adhesion of the output end of the power module module includes: at least one power module 20 for supplying power to the load, at least one first switch module (circuit) 30, and a detecting resistor. Ry, a load switch K1, a control module 10, and a voltage sampling module (circuit) 50 for detecting the voltage of the detecting resistor Ry. The first switch module 30 includes a first switch KA and a first resistor Ra connected in parallel with the first switch KA.
实施例1:Example 1:
本实施例中,电源模块20和第一开关模块30设置有N个,即N个电源模块20(电源模块1-N),N个第一开关KA(K1A-KNA),N个第一电阻Ra(R1a-Rna);一个电源模块20对应连接一个第一开关模块30,其中,N为大于或等于1的整数。In this embodiment, the power module 20 and the first switch module 30 are provided with N, that is, N power modules 20 (power modules 1-N), N first switches KA (K1A-KNA), and N first resistors. Ra (R1a-Rna); a power module 20 is correspondingly connected to a first switch module 30, where N is an integer greater than or equal to 1.
本实施例中,电源模块20采用直流模块,即输出直流电。In this embodiment, the power module 20 uses a DC module, that is, outputs DC power.
所述电源模块20的输出端、对应的第一开关模块30和检测电阻Ry串联连接。具体的,所述电源模块20的一输出端通过第一开关模块30连接电源正极总线或电源负极总线,电源正极总线和电源负极总线之间串联检测电阻Ry。电压采样模块50的两个采样输入端分别连接检测电阻Ry的两端,电压采样模块50的输出端连接控制模块10的输入端。控制模块10的一个输出端连接第一开关KA的控制端。本实施例中,所述电源正极总线为直流总线的正极线DC+,电源负极总线为直流总线的负极线DC-,正负极线连接负载60。所述第一开关KA为继电器开关,第一开关KA的控制端即继电器的线圈。The output end of the power module 20, the corresponding first switch module 30 and the detecting resistor Ry are connected in series. Specifically, an output end of the power module 20 is connected to the power positive bus or the power negative bus through the first switch module 30, and the detecting resistor Ry is connected in series between the positive power bus and the negative power bus. The two sampling inputs of the voltage sampling module 50 are respectively connected to two ends of the detecting resistor Ry, and the output of the voltage sampling module 50 is connected to the input end of the control module 10. An output of the control module 10 is connected to the control terminal of the first switch KA. In this embodiment, the positive power bus of the power supply is the positive line DC+ of the DC bus, the negative power line of the power supply is the negative line DC- of the DC bus, and the positive and negative lines are connected to the load 60. The first switch KA is a relay switch, and the control end of the first switch KA is a coil of the relay.
所述电压采样模块50对检测电阻Ry的电压进行采样,可采用常规的电 压采样电路。The voltage sampling module 50 samples the voltage of the detecting resistor Ry, and can adopt conventional electricity. Pressure sampling circuit.
所述负载开关K1用于控制负载60的供电,所述负载开关K1设置在检测电阻Ry与负载60之间的直流总线的正极线DC+或直流总线的负极线DC-上,本实施例中设置在直流总线的正极线DC+上。The load switch K1 is used to control the power supply of the load 60. The load switch K1 is disposed on the positive line DC+ of the DC bus or the negative line DC- of the DC bus between the detecting resistor Ry and the load 60, and is set in this embodiment. On the positive line DC+ of the DC bus.
所述控制模块10用于控制第一开关KA的断开与闭合(投切),当然也可以用于控制负载开关K1的断开与闭合;在负载开关K1闭合之前,先对电源总线(包括电源正极总线和电源负极总线)上的所有第一开关KA进行黏连检测,在判断第一开关KA未黏连后,再闭合所述负载开关K1。所述黏连检测具体包括:所述控制模块10根据所述检测电阻Ry在第一开关KA断开时的电压来判断第一开关KA是否黏连。The control module 10 is used to control the opening and closing (switching) of the first switch KA, and of course can also be used to control the opening and closing of the load switch K1; before the load switch K1 is closed, the power bus is included (including All the first switches KA on the power positive bus and the negative power bus of the power supply perform adhesion detection, and after determining that the first switch KA is not stuck, the load switch K1 is closed. The adhesion detection specifically includes: the control module 10 determining whether the first switch KA is stuck according to the voltage of the detecting resistor Ry when the first switch KA is turned off.
由于第一开关KA和第一电阻Ra并联,故第一开关KA的黏连与否会影响到检测电阻Ry的电压,即第一开关KA从闭合到断开,若发生黏连则此过程中Ry的电压不会明显变化,因此通过检测所述检测电阻Ry在第一开关KA断开时的电压来判断第一开关KA是否黏连,无需辅助触点开关,实现成本低,提高了系统的安全性。Since the first switch KA and the first resistor Ra are connected in parallel, the adhesion of the first switch KA affects the voltage of the detecting resistor Ry, that is, the first switch KA is closed to open, and if adhesion occurs, the process is in progress. The voltage of Ry does not change significantly. Therefore, by detecting the voltage of the detecting resistor Ry when the first switch KA is turned off, it is determined whether the first switch KA is stuck or not, and the auxiliary contact switch is not needed, thereby achieving low cost and improving the system. safety.
进一步的,所述控制模块10可采用单片机(MCU),其包括驱动单元和比较判断单元。本实施例只考虑采用一个开关控制电源模块20输出的方式。所述驱动单元用于控制第一开关KA的断开与闭合。所述比较判断单元用于通过驱动单元来控制第一开关KA的断开与闭合;在负载开关K1闭合之前,先对电源总线上的所有第一开关KA进行黏连检测,在判断所有第一开关KA未黏连后,再闭合所述负载开关K1。具体的,比较判断单元启动电源模块1,检测该模块和总线之间的第一开关K1A有无黏连,检测完后关闭电源模块1;启动电源模块2,检测该模块和总线之间的第一开关K2A有无黏连,检测完后关闭电源模块2;……;启动电源模块N,检测该模块和总线之间的第一开关KNA有无黏连,检测完后关闭电源模块N;在K1A,K2A,……,KNA都正常时,根据用户需要或者系统需要,闭合负载开关K1,并选择启动一组、多组或所有的电源模块给负载60供电。Further, the control module 10 may employ a single chip microcomputer (MCU), which includes a driving unit and a comparison determining unit. This embodiment only considers the manner in which the output of the power module 20 is controlled by one switch. The drive unit is for controlling the opening and closing of the first switch KA. The comparison judging unit is configured to control the opening and closing of the first switch KA by the driving unit; before the load switch K1 is closed, first perform adhesion detection on all the first switches KA on the power bus, and determine all the first After the switch KA is not stuck, the load switch K1 is closed. Specifically, the comparison determining unit activates the power module 1, detects whether the first switch K1A between the module and the bus is stuck, and turns off the power module 1 after detecting; starts the power module 2, and detects the number between the module and the bus. Whether a switch K2A has adhesive or not, after the detection, the power module 2 is turned off; ...; the power module N is activated, and the first switch KNA between the module and the bus is detected to be non-adhesive, and the power module N is turned off after the detection; When K1A, K2A, ..., KNA are normal, the load switch K1 is closed according to user needs or system requirements, and one, multiple or all power modules are selected to power the load 60.
所述比较判断单元对第一开关KA进行黏连检测,具体为:根据所述检测电阻Ry在第一开关KA断开时的电压来判断第一电阻Ra是否短路,若第一电阻Ra仍处于短路状态则说明第一开关KA黏连,输出用于触发第一开关KA黏连警报提示的指令(报错)。所述系统还包括警报模块,用于接收比较判断 单元输出的指令,发出声、光或电警报,以提示用户第一开关KA黏连。The comparison determining unit performs the adhesion detection on the first switch KA, specifically: determining whether the first resistor Ra is short-circuited according to the voltage of the detecting resistor Ry when the first switch KA is turned off, if the first resistor Ra is still in the The short circuit state indicates that the first switch KA is stuck, and an instruction (error) for triggering the first switch KA to be stuck with the alarm prompt is output. The system also includes an alarm module for receiving comparative judgments The unit outputs an instruction to emit an audible, optical or electrical alarm to prompt the user to stick the first switch KA.
所述驱动单元与第一开关KA的控制端连接,所述比较判断单元的输入端连接电压采样模块50的输出端。The driving unit is connected to the control end of the first switch KA, and the input end of the comparison determining unit is connected to the output end of the voltage sampling module 50.
进一步的,比较判断单元的黏连检测具体为:比较所述检测电阻Ry在第一开关KA断开时的电压是否接近第一预设电压,在接近时认为第一开关KA未黏连,输出第一开关KA未黏连的指令。警报模块获取该指令后可以什么都不做,也可以发出相应的声光或电信号以提示用户。所述第一预设电压为
Figure PCTCN2017094641-appb-000001
其中,Ry为检测电阻的阻值。R总1为电源模块20输出端在第一开关KA完全断开的情况下形成的回路的总电阻,本实施例中,R总1=Ra+Ry。V1为电源模块20的输出电压。检测电阻Ry在第一开关KA断开时的电压是否接近第一预设电压,可采用比较的方式进行判断,例如,比较所述检测电阻Ry在第一开关KA断开时的电压与第一预设电压的差值,在所述差值不超过预设的第一差值范围时,认为第一开关KA未黏连。当然,也可以比较所述检测电阻Ry在第一开关KA断开时的电压与V1的差值,在所述差值不超过预设的第一差值范围时,认为第一开关KA黏连,输出第一开关KA黏连的指令。所述第一差值范围为第一预设电压的正负10%,即
Figure PCTCN2017094641-appb-000002
理论上所述第一差值范围应接近0,考虑到电阻的误差,选取第一预设电压的正负百分之十。较佳的,所述第一差值范围可设置为第一预设电压的正负5%。
Further, the adhesion detection of the comparison determination unit is specifically: comparing whether the voltage of the detection resistor Ry when the first switch KA is off is close to the first preset voltage, and the first switch KA is considered not to be adhered when approaching, and the output is The first switch KA is not glued. After the alarm module obtains the instruction, it can do nothing, and can also issue corresponding sound and light or electrical signals to prompt the user. The first preset voltage is
Figure PCTCN2017094641-appb-000001
Where R y is the resistance of the sense resistor. R total 1 is the total resistance of the loop formed by the output end of the power module 20 when the first switch KA is completely disconnected. In this embodiment, R total 1 = Ra + Ry. V 1 is the output voltage of the power module 20. Whether the voltage of the detecting resistor Ry when the first switch KA is turned off is close to the first preset voltage may be determined by comparing, for example, comparing the voltage of the detecting resistor Ry when the first switch KA is turned off and the first The difference between the preset voltages is considered to be unbonded when the difference does not exceed the preset first difference range. Of course, the difference between the voltage of the detecting resistor Ry when the first switch KA is turned off and V 1 may be compared, and when the difference does not exceed the preset first difference range, the first switch KA is considered to be sticky. Even, the instruction to stick the first switch KA is output. The first difference range is plus or minus 10% of the first preset voltage, that is,
Figure PCTCN2017094641-appb-000002
Theoretically, the first difference range should be close to 0. Considering the error of the resistance, the positive and negative tenths of the first preset voltage are selected. Preferably, the first difference range may be set to be plus or minus 5% of the first preset voltage.
可见,本发明提供的系统,通过在RELAY二端并联电阻,运用电阻分压原理采样电阻二端电压来判断RELAY有无黏连,用RELAY代替接触器并具备RELAY触点黏连检测功能,大幅度降低了成本。It can be seen that the system provided by the present invention determines whether the RELAY has adhesion by using the resistance voltage dividing principle to sample the two-terminal voltage of the resistor at the second end of the RELAY, and replaces the contactor with the RELAY and has the RELAY contact adhesion detection function. The magnitude reduces costs.
实施例2:Example 2:
如图3所示,所述系统还包括至少一个第二开关模块40,所述第二开关模块40包括第二开关KB和与第二开关KB并联的第二电阻Rb。本实施例中,电源模块20、第一开关模块30和第二开关模块40设置有N个,即N个电源模块20(电源模块1-N),N个第一开关KA(K1A-KNA),N个第一电阻Ra (R1a-Rna),N个第二开关KB(K1B-KNB),N个第二电阻Rb(R1b-Rnb);一个电源模块20对应连接一个第一开关模块30和一个第二开关模块40,其中,N为大于或等于1的整数。As shown in FIG. 3, the system further includes at least one second switch module 40, the second switch module 40 including a second switch KB and a second resistor Rb in parallel with the second switch KB. In this embodiment, the power module 20, the first switch module 30, and the second switch module 40 are provided with N, that is, N power modules 20 (power modules 1-N), and N first switches KA (K1A-KNA) , N first resistors Ra (R1a-Rna), N second switches KB (K1B-KNB), N second resistors Rb (R1b-Rnb); one power module 20 is connected to a first switch module 30 and a second switch module 40, Where N is an integer greater than or equal to 1.
本实施例中,电源模块20采用直流模块,即输出直流电。所述电源模块20的正极输出端通过第一开关KA和第一电阻Ra连接电源正极总线,电源正极总线通过所述检测电阻Ry连接电源负极总线,电源负极总线通过第二开关KB和第二电阻Rb连接电源模块20的负极输出端。所述电源模块20的负极输出端接地。In this embodiment, the power module 20 uses a DC module, that is, outputs DC power. The positive output terminal of the power module 20 is connected to the positive power bus of the power supply through the first switch KA and the first resistor Ra. The positive power bus of the power supply is connected to the negative power bus of the power supply through the detecting resistor Ry, and the negative power bus of the power supply passes through the second switch KB and the second resistor. Rb is connected to the negative output terminal of the power module 20. The negative output terminal of the power module 20 is grounded.
电压采样模块50的两个采样输入端分别连接检测电阻Ry的两端,电压采样模块50的输出端连接控制模块10的输入端。本实施例中,所述电源正极总线为直流总线的正极线DC+,电源负极总线为直流总线的负极线DC-,正负极线连接负载60。所述第一开关KA和第二开关KB均为继电器开关,第一开关KA和第二开关KB的控制端即继电器的线圈。The two sampling inputs of the voltage sampling module 50 are respectively connected to two ends of the detecting resistor Ry, and the output of the voltage sampling module 50 is connected to the input end of the control module 10. In this embodiment, the positive power bus of the power supply is the positive line DC+ of the DC bus, the negative power line of the power supply is the negative line DC- of the DC bus, and the positive and negative lines are connected to the load 60. The first switch KA and the second switch KB are both relay switches, and the control ends of the first switch KA and the second switch KB are the coils of the relay.
所述负载开关K1用于控制负载60的供电,所述负载开关K1设置在检测电阻Ry与负载60之间的直流总线的正极线DC+或直流总线的负极线DC-上,本实施例中设置在直流总线的正极线DC+上。The load switch K1 is used to control the power supply of the load 60. The load switch K1 is disposed on the positive line DC+ of the DC bus or the negative line DC- of the DC bus between the detecting resistor Ry and the load 60, and is set in this embodiment. On the positive line DC+ of the DC bus.
所述控制模块10用于控制第一开关KA和第二开关KB的断开与闭合(投切),当然也可以用于控制负载开关K1的断开与闭合;在负载开关K1闭合之前,先对电源总线(包括电源正极总线和电源负极总线)上的所有第一开关KA和第二开关KB进行黏连检测,在判断第一开关KA和第二开关KB未黏连后,再闭合所述负载开关K1。所述黏连检测具体包括:所述控制模块10根据所述检测电阻Ry在第一开关KA断开时的电压来判断第一开关KA是否黏连,根据所述检测电阻Ry在第二开关KB断开时的电压来判断第二开关KB是否黏连。控制模块10对第一开关KA和第二开关KB的黏连检测可以分开进行,也可以同时进行;分开进行时,保持不需要检测的开关闭合,断开需要检测的那个开关进行检测,其具体过程在上一实施例中已详细阐述,在此不再赘述。本实施例主要描述同时对第一开关KA和第二开关KB进行黏连检测,换而言之,第一开关KA和第二开关KB联动。控制模块10的一个输出端连接第一开关KA的控制端和第二开关KB的控制端。The control module 10 is configured to control the opening and closing (switching) of the first switch KA and the second switch KB, and of course can also be used to control the opening and closing of the load switch K1; before the load switch K1 is closed, Performing adhesion detection on all the first switch KA and the second switch KB on the power bus (including the power positive bus and the negative power bus), and then closing the first switch KA and the second switch KB after the first switch KA and the second switch KB are not adhered Load switch K1. The adhesion detection specifically includes: the control module 10 determining whether the first switch KA is stuck according to the voltage of the detecting resistor Ry when the first switch KA is turned off, according to the detecting resistor Ry being in the second switch KB The voltage at the time of disconnection determines whether the second switch KB is stuck. The adhesion detection of the first switch KA and the second switch KB by the control module 10 may be performed separately or simultaneously; when separately, the switch that does not need to be detected is closed, and the switch that needs to be detected is turned off for detection. The process has been described in detail in the previous embodiment and will not be described herein. This embodiment mainly describes the adhesion detection of the first switch KA and the second switch KB at the same time. In other words, the first switch KA and the second switch KB are linked. An output of the control module 10 is connected to the control terminal of the first switch KA and the control terminal of the second switch KB.
进一步的,所述控制模块10包括驱动单元和比较判断单元。Further, the control module 10 includes a driving unit and a comparison determining unit.
本实施例采用两个开关控制电源模块20输出的方式。所述驱动单元用于 控制第一开关KA和第二开关KB的断开与闭合。所述比较判断单元用于通过驱动单元来控制第一开关KA和第二开关KB的断开与闭合;在负载开关K1闭合之前,先对电源总线上的所有第一开关KA和第二开关KB进行黏连检测,在判断所有第一开关KA和第二开关KB未黏连后,再闭合所述负载开关K1。具体的,比较判断单元启动电源模块1,检测该模块和总线之间的第一开关K1A和第二开关K1B有无黏连,检测完后关闭电源模块1;启动电源模块2,检测该模块和总线之间的第一开关K2A和第二开关K2B有无黏连,检测完后关闭电源模块2;……;启动电源模块N,检测该模块和总线之间的第一开关KNA和第二开关KNB有无黏连,检测完后关闭电源模块N;在K1A,K1B,……,KNA,KNB都正常时,根据用户需要或者系统需要,闭合负载开关K1,并选择启动一组、多组或所有的电源模块给负载60供电。This embodiment uses two switches to control the output of the power module 20. The drive unit is used for The opening and closing of the first switch KA and the second switch KB are controlled. The comparison judging unit is configured to control opening and closing of the first switch KA and the second switch KB by the driving unit; before the load switch K1 is closed, first all the first switch KA and the second switch KB on the power bus The adhesion detection is performed, and after the first switch KA and the second switch KB are judged to be unbonded, the load switch K1 is closed. Specifically, the comparison determining unit activates the power module 1, detects whether the first switch K1A and the second switch K1B between the module and the bus are stuck, and turns off the power module 1 after detecting; starts the power module 2, detects the module and Whether the first switch K2A and the second switch K2B between the buses are stuck, and after the detection, the power module 2 is turned off; ...; the power module N is activated, and the first switch KNA and the second switch between the module and the bus are detected. KNB has no adhesion, after the detection, turn off the power module N; when K1A, K1B, ..., KNA, KNB are normal, according to user needs or system needs, close the load switch K1, and choose to start one or more groups or All power modules supply power to load 60.
所述比较判断单元对第一开关KA和第二开关KB进行黏连检测,具体为:根据所述检测电阻Ry在第一开关KA断开时的电压来判断第一电阻Ra是否短路,若第一电阻Ra仍处于短路状态则说明第一开关KA黏连,输出用于触发第一开关KA黏连警报提示的指令;根据所述检测电阻Ry在第二开关KB断开时的电压来判断第二电阻Rb是否短路,若第二电阻Rb仍处于短路状态则输出用于触发第二开关KB黏连警报提示的指令。所述系统还包括警报模块,用于接收比较判断单元输出的指令,发出声、光或电警报,以提示用户第一开关KA和/或第二开关KB黏连。The comparison determining unit performs adhesion detection on the first switch KA and the second switch KB, specifically: determining whether the first resistor Ra is short-circuited according to the voltage of the detecting resistor Ry when the first switch KA is turned off. When the resistance Ra is still in the short circuit state, the first switch KA is stuck, and the command for triggering the first switch KA to be stuck with the alarm prompt is output; and the voltage is determined according to the voltage of the detecting resistor Ry when the second switch KB is turned off. Whether the two resistors Rb are short-circuited, and if the second resistor Rb is still in a short-circuit state, an instruction for triggering the second switch KB sticking alarm prompt is output. The system further includes an alarm module for receiving an instruction output by the comparison determination unit to issue an audible, optical or electrical alarm to prompt the user to stick the first switch KA and/or the second switch KB.
所述驱动单元与第一开关KA的控制端、第二开关KB的控制端连接,所述比较判断单元的输入端连接电压采样模块的输出端。所述驱动单元还与比较判断单元连接。The driving unit is connected to the control end of the first switch KA and the control end of the second switch KB, and the input end of the comparison determining unit is connected to the output end of the voltage sampling module. The drive unit is also connected to the comparison determination unit.
进一步的,比较判断单元的黏连检测具体为:比较所述检测电阻Ry在第一开关KA和第二开关KB断开时的电压与第一预设电压的差值,在所述差值不超过预设的第一差值范围时,输出第一开关KA和第二开关KB未黏连的指令。所述第一预设电压为
Figure PCTCN2017094641-appb-000003
其中,Ry为检测电阻的阻值,R总1为电源模块输出端在第一开关KA和第二开关KB均完全断开的情况下形成的回路的总电阻,本实施例中,R总1=Ra+Rb+Ry;V1为电源模块20的输出电压。所述第一差值范围为其对应预设电压的正负10%,换而言之,所述第一差值 范围为
Figure PCTCN2017094641-appb-000004
优选的,所述第一差值范围为第一预设电压的正负5%。第一开关KA和第二开关KB断开时,若第一开关KA和第二开关KB未黏连,电源模块输出端串联有Ra、Ry和Rb三个电阻;若第一开关KA和/或第二开关KB黏连,则Ra和/或Rb被短路,因此开关黏连与否会影响到Ry的电压,从而可以根据Ry的电压判断开关是否黏连。
Further, the adhesion detection of the comparison determination unit is specifically: comparing the difference between the voltage of the detection resistor Ry when the first switch KA and the second switch KB are disconnected and the first preset voltage, where the difference is not When the preset first difference range is exceeded, an instruction that the first switch KA and the second switch KB are not stuck is output. The first preset voltage is
Figure PCTCN2017094641-appb-000003
Where R y is the resistance of the sense resistor, and R total 1 is the total resistance of the loop formed by the output of the power module when the first switch KA and the second switch KB are completely disconnected. In this embodiment, R total 1 = Ra + Rb + Ry; V 1 is the output voltage of the power module 20. The first difference range is plus or minus 10% of the corresponding preset voltage, in other words, the first difference range is
Figure PCTCN2017094641-appb-000004
Preferably, the first difference range is plus or minus 5% of the first preset voltage. When the first switch KA and the second switch KB are disconnected, if the first switch KA and the second switch KB are not adhered, the output terminals of the power module are connected in series with three resistors of Ra, Ry and Rb; if the first switch KA and/or When the second switch KB is stuck, Ra and/or Rb are short-circuited, so whether the switch is stuck or not affects the voltage of Ry, so that the switch can be judged according to the voltage of Ry.
所述比较判断单元比较所述检测电阻Ry在第一开关KA和第二开关KB断开时的电压与第二预设电压的差值,在所述差值不超过预设的第二差值范围时,输出用于触发第二开关KB黏连警报提示的指令;所述第二预设电压为
Figure PCTCN2017094641-appb-000005
其中,R总2为电源模块20输出端在第一开关KA完全断开、第二开关KB闭合的情况下形成的回路的总电阻,本实施例中,R总2=Ra+Ry。所述第二差值范围为其对应预设电压的正负10%,换而言之,所述第二差值范围为
Figure PCTCN2017094641-appb-000006
优选的,所述第二差值范围为第二预设电压的正负5%。
The comparison determining unit compares a difference between a voltage of the detecting resistor Ry when the first switch KA and the second switch KB is turned off and a second preset voltage, where the difference does not exceed a preset second difference. In the range, outputting an instruction for triggering the second switch KB to be attached to the alert prompt; the second preset voltage is
Figure PCTCN2017094641-appb-000005
Wherein, R total 2 is the total resistance of the loop formed by the output end of the power module 20 when the first switch KA is completely disconnected and the second switch KB is closed. In this embodiment, R total 2 = Ra + Ry. The second difference range is plus or minus 10% of the corresponding preset voltage, in other words, the second difference range is
Figure PCTCN2017094641-appb-000006
Preferably, the second difference range is plus or minus 5% of the second preset voltage.
所述比较判断单元比较所述检测电阻Ry在第一开关KA和第二开关KB断开时的电压与第三预设电压的差值,在所述差值不超过预设的第三差值范围时,输出用于触发第一开关KA黏连警报提示的指令;所述第三预设电压为
Figure PCTCN2017094641-appb-000007
其中,R总3为电源模块输出端在第一开关KA闭合、第二开关KB完全断开的情况下形成的回路的总电阻,本实施例中,R总3=Rb+Ry。所述第三差值范围为其对应预设电压的正负10%,换而言之,所述第三差值范围为
Figure PCTCN2017094641-appb-000008
优选的,所述第三差值范围为第三预设电压的正负5%。所述第一电阻Ra和第二电阻Rb阻值可以相同也可以不同,若第一电阻Ra和第二电阻Rb阻值相同,第二预设电压和第三预设电压相同,只能判断出第一开关KA和第二开关KB中有一个黏连,无法判断具体哪个开关黏连,故本实施例中,第一电阻Ra和第二电阻Rb的阻值不同。
The comparison determining unit compares a difference between a voltage of the detecting resistor Ry when the first switch KA and the second switch KB is turned off and a third preset voltage, where the difference does not exceed a preset third difference. In the range, outputting an instruction for triggering the first switch KA to be attached to the alert prompt; the third preset voltage is
Figure PCTCN2017094641-appb-000007
Wherein, R total 3 is the total resistance of the loop formed by the power module output terminal when the first switch KA is closed and the second switch KB is completely disconnected. In this embodiment, R total 3 = Rb + Ry. The third difference range is plus or minus 10% of the corresponding preset voltage, in other words, the third difference range is
Figure PCTCN2017094641-appb-000008
Preferably, the third difference range is plus or minus 5% of the third preset voltage. The resistances of the first resistor Ra and the second resistor Rb may be the same or different. If the resistances of the first resistor Ra and the second resistor Rb are the same, the second preset voltage and the third preset voltage are the same, and only the One of the first switch KA and the second switch KB is stuck, and it is impossible to determine which of the switches is stuck. Therefore, in the present embodiment, the resistances of the first resistor Ra and the second resistor Rb are different.
所述比较判断单元比较所述检测电阻Ry在第一开关KA和第二开关KB断开时的电压与电源模块输出的电压的差值,在所述差值不超过预设的第四差值范围时,输出用于触发第一开关KA和第二开关KB黏连警报提示的指令。所述第四差值范围为其对应预设电压的正负10%,换而言之,所述第四差值范围为-0.1×V1~0.1×V1。优选的,所述第四差值范围为第四预设电压的正负5%。The comparison determining unit compares a difference between a voltage of the detecting resistor Ry when the first switch KA and the second switch KB is disconnected and a voltage output by the power module, where the difference does not exceed a preset fourth difference. In the range, an instruction for triggering the first switch KA and the second switch KB to be attached to the alarm prompt is output. The fourth difference range is plus or minus 10% of the corresponding preset voltage. In other words, the fourth difference range is -0.1×V 1 to 0.1×V 1 . Preferably, the fourth difference range is plus or minus 5% of the fourth preset voltage.
可见,本发明提供的系统,通过在继电器开关的二端并联电阻,运用电阻分压原理采样电阻二端电压来判断继电器开关有无黏连,用继电器开关代替接触器并具备继电器触点开关黏连检测功能,大幅度降低了成本。It can be seen that the system provided by the present invention determines the presence or absence of adhesion of the relay switch by using the resistance division principle at the two ends of the relay switch, and using the resistance division principle to sample the two terminals of the resistor, and replaces the contactor with a relay switch and has a relay contact switch. Even the detection function greatly reduces the cost.
基于上述实施例提供的系统,本发明还提供一种检测电源模块输出端开关黏连的方法,如图4所示,所述方法包括如下步骤:Based on the system provided by the foregoing embodiment, the present invention further provides a method for detecting the adhesion of the switch of the output end of the power module. As shown in FIG. 4, the method includes the following steps:
S10、控制模块10在负载开关K1闭合之前,先对电源总线上的所有第一开关KA进行黏连检测,在判断所有第一开关KA未黏连后,再闭合所述负载开关K1。具体的,控制模块10启动电源模块1,检测该模块和总线之间的第一开关K1A有无黏连,检测完后关闭电源模块1;启动电源模块2,检测该模块和总线之间的第一开关K2A有无黏连,检测完后关闭电源模块2;……;启动电源模块N,检测该模块和总线之间的第一开关KNA有无黏连,检测完后关闭电源模块N;在K1A,K2A,……,KNA都正常时,根据用户需要或者系统需要,闭合负载开关K1,并选择启动一组、多组或所有的电源模块给负载60供电。S10. The control module 10 performs adhesion detection on all the first switches KA on the power bus before the load switch K1 is closed, and then closes the load switch K1 after determining that all the first switches KA are not stuck. Specifically, the control module 10 activates the power module 1, detects whether the first switch K1A between the module and the bus is stuck, and turns off the power module 1 after detecting; starts the power module 2, and detects the number between the module and the bus. Whether a switch K2A has adhesive or not, after the detection, the power module 2 is turned off; ...; the power module N is activated, and the first switch KNA between the module and the bus is detected to be non-adhesive, and the power module N is turned off after the detection; When K1A, K2A, ..., KNA are normal, the load switch K1 is closed according to user needs or system requirements, and one, multiple or all power modules are selected to power the load 60.
所述步骤S10中,控制模块10对第一开关KA进行黏连检测,具体包括:In the step S10, the control module 10 performs the adhesion detection on the first switch KA, which specifically includes:
S110、电压采样模块50检测检测电阻Ry的电压。S110. The voltage sampling module 50 detects the voltage of the detecting resistor Ry.
S120、控制模块10控制第一开关KA断开;根据所述检测电阻Ry在第一开关KA断开时的电压来判断第一开关KA是否黏连。S120, the control module 10 controls the first switch KA to be disconnected; and determines whether the first switch KA is stuck according to the voltage of the detecting resistor Ry when the first switch KA is turned off.
当然,电源总线上还可以设置第二开关KB,则所述步骤S10为:在负载开关K1闭合之前,先对电源总线上的所有第一开关KA和第二开关KB进行黏连检测,在判断所有第一开关KA和第二开关KB未黏连后,再闭合所述负载开关K1。具体的,比较判断单元启动电源模块1,检测该模块和总线之间的第一开关K1A和第二开关K1B有无黏连,检测完后关闭电源模块1;启动电源模块2,检测该模块和总线之间的第一开关K2A和第二开关K2B有无黏连,检测完后关闭电源模块2;……;启动电源模块N,检测该模块和总线之间的 第一开关KNA和第二开关KNB有无黏连,检测完后关闭电源模块N;在K1A,K1B,……,KNA,KNB都正常时,根据用户需要或者系统需要,闭合负载开关K1,并选择启动一组、多组或所有的电源模块给负载60供电。Of course, the second switch KB can also be set on the power bus, and the step S10 is: before the load switch K1 is closed, firstly perform adhesion detection on all the first switch KA and the second switch KB on the power bus, in judging After all the first switch KA and the second switch KB are not bonded, the load switch K1 is closed. Specifically, the comparison determining unit activates the power module 1, detects whether the first switch K1A and the second switch K1B between the module and the bus are stuck, and turns off the power module 1 after detecting; starts the power module 2, detects the module and Whether the first switch K2A and the second switch K2B between the buses are stuck, and after the detection, the power module 2 is turned off; ...; the power module N is activated, and the module is detected between the bus and the bus. Whether the first switch KNA and the second switch KNB are stuck, and after the detection, the power module N is turned off; when K1A, K1B, ..., KNA, and KNB are normal, the load switch K1 is closed according to user needs or system requirements, and Select to power one, multiple, or all of the power modules to power load 60.
所述步骤S10中,控制模块10对第一开关KA和第二开关KB进行黏连检测,具体包括:In the step S10, the control module 10 performs adhesion detection on the first switch KA and the second switch KB, and specifically includes:
S110'、电压采样模块50检测检测电阻Ry的电压。S110', the voltage sampling module 50 detects the voltage of the detecting resistor Ry.
S120'、控制模块10控制第一开关KA和第二开关KB断开;根据所述检测电阻Ry在第一开关KA和第二开关KB断开时的电压来判断第一开关KA和第二开关KB是否黏连。具体的,控制模块10根据所述检测电阻Ry在第一开关KA断开时的电压来判断第一电阻Ra是否短路,若第一电阻Ra仍处于短路状态则说明第一开关KA黏连,输出用于触发第一开关KA黏连警报提示的指令;根据所述检测电阻Ry在第二开关KB断开时的电压来判断第二电阻Rb是否短路,若第二电阻Rb仍处于短路状态则输出用于触发第二开关KB黏连警报提示的指令。S120', the control module 10 controls the first switch KA and the second switch KB to be disconnected; and determines the first switch KA and the second switch according to the voltage of the detecting resistor Ry when the first switch KA and the second switch KB are turned off. Whether KB sticks. Specifically, the control module 10 determines whether the first resistor Ra is short-circuited according to the voltage of the detecting resistor Ry when the first switch KA is turned off. If the first resistor Ra is still in the short-circuit state, the first switch KA is stuck and outputted. An instruction for triggering the first switch KA to be stuck with the alarm prompt; determining whether the second resistor Rb is short-circuited according to the voltage of the detecting resistor Ry when the second switch KB is turned off, and outputting if the second resistor Rb is still in a short-circuit state An instruction to trigger a second switch KB to attach an alert prompt.
由于所述方法的特点和原理在上述系统实施例中已详细阐述,在此不再赘述。Since the features and principles of the method are described in detail in the foregoing system embodiment, details are not described herein again.
本领域技术人员可以理解,上述实施方式中各种方法的全部或部分功能可以通过硬件的方式实现,也可以通过计算机程序的方式实现。当上述实施方式中全部或部分功能通过计算机程序的方式实现时,该程序可以存储于一计算机可读存储介质中,存储介质可以包括:只读存储器、随机存储器、磁盘、光盘、硬盘等,通过计算机执行该程序以实现上述功能。例如,将程序存储在设备的存储器中,当通过处理器执行存储器中程序,即可实现上述全部或部分功能。另外,当上述实施方式中全部或部分功能通过计算机程序的方式实现时,该程序也可以存储在服务器、另一计算机、磁盘、光盘、闪存盘或移动硬盘等存储介质中,通过下载或复制保存到本地设备的存储器中,或对本地设备的系统进行版本更新,当通过处理器执行存储器中的程序时,即可实现上述实施方式中全部或部分功能。Those skilled in the art can understand that all or part of the functions of the various methods in the above embodiments may be implemented by hardware or by a computer program. When all or part of the functions in the above embodiments are implemented by a computer program, the program may be stored in a computer readable storage medium, and the storage medium may include: a read only memory, a random access memory, a magnetic disk, an optical disk, a hard disk, etc. The computer executes the program to implement the above functions. For example, the program is stored in the memory of the device, and when the program in the memory is executed by the processor, all or part of the above functions can be realized. In addition, when all or part of the functions in the above embodiment are implemented by a computer program, the program may also be stored in a storage medium such as a server, another computer, a magnetic disk, an optical disk, a flash disk or a mobile hard disk, and may be saved by downloading or copying. The system is updated in the memory of the local device, or the system of the local device is updated. When the program in the memory is executed by the processor, all or part of the functions in the above embodiments may be implemented.
以上应用了具体个例对本发明进行阐述,只是用于帮助理解本发明,并不用以限制本发明。对于本领域的一般技术人员,依据本发明的思想,可以对上述具体实施方式进行变化。 The invention has been described above with reference to specific examples, which are merely intended to aid the understanding of the invention and are not intended to limit the invention. Variations to the above-described embodiments may be made in accordance with the teachings of the present invention.

Claims (10)

  1. 一种检测电源模块输出端开关黏连的系统,其特征在于,包括:至少一个用于给负载供电的电源模块、至少一个第一开关模块、检测电阻、控制模块以及用于检测所述检测电阻电压的电压采样模块;所述第一开关模块包括第一开关和与第一开关并联的第一电阻;A system for detecting adhesion of an output switch of a power module, comprising: at least one power module for supplying power to a load, at least one first switch module, a detecting resistor, a control module, and detecting the detecting resistor a voltage sampling module of the voltage; the first switching module includes a first switch and a first resistor in parallel with the first switch;
    所述电源模块的输出端、第一开关模块和检测电阻串联连接;The output end of the power module, the first switch module and the detecting resistor are connected in series;
    所述控制模块控制第一开关的断开与闭合,根据所述检测电阻在第一开关断开时的电压来判断第一开关是否黏连。The control module controls opening and closing of the first switch, and determines whether the first switch is stuck according to a voltage of the detecting resistor when the first switch is turned off.
  2. 如权利要求1所述的检测电源模块输出端开关黏连的系统,其特征在于,所述系统还包括至少一个第二开关模块,所述第二开关模块包括第二开关和与第二开关并联的第二电阻;A system for detecting adhesion of an output switch of a power module according to claim 1, wherein said system further comprises at least one second switch module, said second switch module comprising a second switch and being connected in parallel with said second switch Second resistance
    所述电源模块的正极输出端通过第一开关和第一电阻连接电源正极总线,电源正极总线通过所述检测电阻连接电源负极总线,电源负极总线通过第二开关和第二电阻连接电源模块的负极输出端;The positive output terminal of the power module is connected to the positive power bus of the power supply through the first switch and the first resistor, and the positive bus of the power supply is connected to the negative power bus of the power supply through the detecting resistor, and the negative power bus of the power supply is connected to the negative pole of the power module through the second switch and the second resistor. Output
    所述控制模块还用于控制第二开关的断开与闭合,根据所述检测电阻在第二开关断开时的电压来判断第二开关是否黏连。The control module is further configured to control opening and closing of the second switch, and determine whether the second switch is stuck according to a voltage of the detecting resistor when the second switch is turned off.
  3. 如权利要求1或2所述的检测电源模块输出端开关黏连的系统,其特征在于,所述控制模块根据所述检测电阻在第一开关断开时的电压来判断第一开关是否黏连具体包括:根据所述检测电阻在第一开关断开时的电压来判断第一电阻是否短路,若第一电阻仍处于短路状态则输出用于触发第一开关黏连警报提示的指令。The system for detecting the adhesion of an output switch of a power module according to claim 1 or 2, wherein the control module determines whether the first switch is stuck according to a voltage of the detecting resistor when the first switch is turned off. Specifically, the method includes: determining, according to the voltage of the detecting resistor when the first switch is turned off, whether the first resistor is short-circuited, and if the first resistor is still in a short-circuit state, outputting an instruction for triggering the first switch adhesion alarm prompt.
  4. 如权利要求2所述的检测电源模块输出端开关黏连的系统,其特征在于,所述控制模块根据所述检测电阻在第二开关断开时的电压来判断第二开关是否黏连具体包括:根据所述检测电阻在第二开关断开时的电压来判断第二电阻是否短路,若第二电阻仍处于短路状态则输出用于触发第二开关黏连警报提示的指令。The system for detecting the adhesion of the output switch of the power module according to claim 2, wherein the control module determines whether the second switch is stuck according to the voltage of the detecting resistor when the second switch is turned off, and specifically includes: And determining, according to the voltage of the detecting resistor when the second switch is turned off, whether the second resistor is short-circuited, and if the second resistor is still in the short-circuit state, outputting an instruction for triggering the second switch adhesion alarm prompt.
  5. 如权利要求2所述的检测电源模块输出端开关黏连的系统,其特征在于,所述控制模块根据所述检测电阻在第一开关断开时的电压来判断第一开关是否黏连,根据所述检测电阻在第二开关断开时的电压来判断第二开关是否黏连具体包括:The system for detecting adhesion of an output switch of a power module according to claim 2, wherein the control module determines whether the first switch is stuck according to a voltage of the detecting resistor when the first switch is turned off, according to The voltage of the detecting resistor when the second switch is turned off to determine whether the second switch is stuck specifically includes:
    闭合第一开关和第二开关,控制第一开关和第二开关同时断开,比较所述检测电阻在开关断开时的电压与第一预设电压的差值,在所述差值不超过 预设的第一差值范围时,输出第一开关和第二开关未黏连的指令;所述第一预设电压为
    Figure PCTCN2017094641-appb-100001
    其中,Ry为检测电阻的阻值,R总1为电源模块输出端在第一开关和第二开关均完全断开的情况下形成的回路的总电阻,V1为电源模块的输出电压;
    Closing the first switch and the second switch, controlling the first switch and the second switch to be simultaneously turned off, and comparing a difference between a voltage of the detecting resistor when the switch is turned off and a first preset voltage, where the difference does not exceed And outputting, by the preset first difference range, an instruction that the first switch and the second switch are not stuck; the first preset voltage is
    Figure PCTCN2017094641-appb-100001
    Where R y is the resistance of the sense resistor, and R total 1 is the total resistance of the loop formed by the output of the power module when the first switch and the second switch are completely disconnected, and V 1 is the output voltage of the power module;
    和/或,比较所述检测电阻在开关断开时的电压与第二预设电压的差值,在所述差值不超过预设的第二差值范围时,输出用于触发第二开关黏连警报提示的指令;所述第二预设电压为
    Figure PCTCN2017094641-appb-100002
    其中,R总2为电源模块输出端在第一开关完全断开、第二开关闭合的情况下形成的回路的总电阻;
    And/or comparing a difference between a voltage of the detecting resistor when the switch is turned off and a second preset voltage, and when the difference does not exceed a preset second difference range, the output is used to trigger the second switch An instruction to adhere to an alert prompt; the second predetermined voltage is
    Figure PCTCN2017094641-appb-100002
    Wherein, R total 2 is the total resistance of the loop formed by the output end of the power module when the first switch is completely opened and the second switch is closed;
    和/或,比较所述检测电阻在开关断开时的电压与第三预设电压的差值,在所述差值不超过预设的第三差值范围时,输出用于触发第一开关黏连警报提示的指令;所述第三预设电压为
    Figure PCTCN2017094641-appb-100003
    其中,R总3为电源模块输出端在第一开关闭合、第二开关完全断开的情况下形成的回路的总电阻;
    And/or comparing a difference between a voltage of the detecting resistor when the switch is turned off and a third preset voltage, and when the difference does not exceed a preset third difference range, the output is used to trigger the first switch An instruction to adhere to an alert prompt; the third preset voltage is
    Figure PCTCN2017094641-appb-100003
    Wherein, R total 3 is the total resistance of the loop formed by the output end of the power module when the first switch is closed and the second switch is completely disconnected;
    和/或,比较所述检测电阻在开关断开时的电压与电源模块输出的电压的差值,在所述差值不超过预设的第四差值范围时,输出用于触发第一开关和第二开关黏连警报提示的指令。And/or comparing a difference between a voltage of the detecting resistor when the switch is turned off and a voltage output by the power module, and when the difference does not exceed a preset fourth difference range, the output is used to trigger the first switch And the second switch is attached to the instruction of the alarm prompt.
  6. 如权利要求5所述的检测电源模块输出端开关黏连的系统,其特征在于,所述第一差值范围、第二差值范围、第三差值范围或者第四差值范围为对应预设电压的正负10%。The system for detecting adhesion of an output switch of a power module according to claim 5, wherein the first difference range, the second difference range, the third difference range, or the fourth difference range is a corresponding pre- Set the voltage to plus or minus 10%.
  7. 如权利要求5所述的检测电源模块输出端开关黏连的系统,其特征在于,所述第一电阻和第二电阻的阻值不同。The system for detecting the adhesion of an output switch of a power module according to claim 5, wherein the resistances of the first resistor and the second resistor are different.
  8. 如权利要求2所述的检测电源模块输出端开关黏连的系统,其特征在于,所述系统还包括负载开关,所述负载开关设置在检测电阻与负载之间的电源正极总线或电源负极总线上。The system for detecting the adhesion of an output switch of a power module according to claim 2, wherein the system further comprises a load switch, the load switch being disposed between the detecting resistor and the load, the positive bus or the negative bus of the power supply. on.
  9. 如权利要求8所述的检测电源模块输出端开关黏连的系统,其特征在于,所述控制模块在判断第一开关和第二开关均未黏连后,闭合所述负载开关。The system for detecting the adhesion of the output switch of the power module according to claim 8, wherein the control module closes the load switch after determining that the first switch and the second switch are not adhered.
  10. 一种检测电源模块输出端开关黏连的方法,其特征在于,包括如下 步骤:A method for detecting adhesion of a switch of an output end of a power module, characterized in that the method includes the following step:
    电压采样模块检测检测电阻的电压;The voltage sampling module detects the voltage of the detecting resistor;
    控制模块控制第一开关断开;根据所述检测电阻在第一开关断开时的电压来判断第一开关是否黏连。 The control module controls the first switch to be turned off; determining whether the first switch is stuck according to the voltage of the detecting resistor when the first switch is turned off.
PCT/CN2017/094641 2017-07-27 2017-07-27 Method and system for detecting switch adhesion of output end of power module WO2019019082A1 (en)

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