TWI531895B - Inrush current recording module - Google Patents

Description

Surge current recording module

The invention relates to a surge current recording module, in particular to a surge current recording module installed in a power supply.

According to the surge current (Surge current), it can also be called surge current, which refers to the current generated by the instantaneous surge voltage entering a power supply device (such as a power supply) through an external power source, and the factor of generating the surge current. Many, such as the switching of the power supply grid, the current start or stop of the power supply device, or the power supply network is subjected to lightning strikes, etc., the surge current is often greater than the maximum current that the power supply device can withstand, and the power supply device occurs. Abnormal, even causing damage to components in the power supply unit, and the surge current is generated about 60 times per year on average.

In this regard, many power supply manufacturers have proposed a number of different technical solutions to solve the problems caused by the surge current, such as the Republic of China Announcement No. 201526487 Patent Case, Republic of China Announcement No. I367624 Patent Case, Republic of China Announced Patent No. I494747, etc. However, although the above patent case can suppress or protect the surge current to a certain extent, the surge current is not classified and recorded. In this way, when the current change caused by the surge current still causes damage to the power supply device, and the power supply device fails to work normally, the consumer terminal or the use terminal will incur responsibility for the power supply device manufacturer to provide a good The product, which caused the power supply device to be grievous, even damaged the goodwill and lost the cost of maintenance.

The main object of the present invention is to solve the problems that are not caused by the recording and classification of surge currents in the conventional embodiment.

In order to achieve the above object, the present invention provides a surge current recording module, which is disposed in a power supply, the power supply has a transformer, and the power supply has a pre-stage power supply circuit and a subsequent stage. a power supply circuit, wherein the front stage power supply circuit has a first ground end, the rear stage power supply circuit has a second ground end different from the first ground end, and the power supply device generates a power output signal when the power is normally supplied. . The inrush current recording module includes a series circuit and a sensing recording unit. The series circuit is formed by a capacitor and a resistor. The two ends of the series circuit are respectively connected to the first ground end and the second ground end. . The sensing recording unit performs voltage sensing on the two ends of the resistor to generate a voltage signal, the sensing recording unit presets a voltage judgment level for comparing the voltage signals, and the voltage signal is greater than the voltage The time point of determining the level is used as the checking time of the counting start point, and the sensing recording unit cannot obtain the power output signal before the end of the checking time, that is, recording a harmful surge current, and the power is still obtained after the checking time ends. The output signal records a harmless surge current.

In an embodiment, the power supply circuit has a first power supply path for supplying at least one working power and a second power supply path for supplying a standby power to the power supply circuit, and the surge current recording module is connected to the first power supply circuit. The second power supply path obtains the standing power to operate, and has a storage capacitor, the storage capacitor has a charging state for obtaining the standby power and storing, and outputting power to the sensing and recording unit if the standing power cannot be obtained. Discharge status.

In one embodiment, the inrush current recording module has a one-way conducting component connected to the second power supply path.

In one embodiment, the two ends of the capacitor are respectively connected to the first ground end and the resistor, and the two ends of the resistor are respectively connected to the second ground end and the capacitor.

In one embodiment, the sensing recording unit has two sensing circuits respectively connected to one end of the resistor, and a first signal receiving circuit that obtains the power output signal.

In an embodiment, the power supply device receives a power-on signal from an external device to start power supply, and the sensing and recording unit has an enabling condition for acquiring the power-on signal to perform recording. Further, the sensing recording unit has a second signal receiving circuit that accepts the power-on signal.

According to the above embodiment of the present invention, the surge current recording module includes a series circuit and a sensing recording unit, and the series circuit is composed of a capacitor and a resistor, and the series circuit The first ground end of the front stage power supply circuit and the second ground end of the rear stage power supply circuit are respectively connected to the two ends, and the sensing recording unit senses the resistance to generate the voltage signal, and the voltage is used The determining level compares the voltage signal, and when the voltage signal is greater than the voltage determining level, the time is checked, and whether a power output signal is obtained during the checking time is used as a basis for recording a harmful surge current or Harmless inrush current. Thereby, in order to enable the maintenance personnel to read the recording result of the sensing recording unit in the future, it is determined whether the cause of the failure of the power supply is caused by the harmful surge current.

The detailed description and technical contents of the present invention will now be described as follows:

Referring to FIG. 1 , the present invention provides a surge current recording module disposed in a power supply 1 . Further, the inrush current recording module can be used as an auxiliary circuit board. The mode is set in the power supply 1 or is built in the constituent circuit of the power supply 1. The inrush current recording module can be applied to the power supply 1 of a plurality of different embodiments. The present invention is exemplified by a single embodiment, but is not limited thereto. In one embodiment, the power supply 1 includes at least a power factor correction unit 11, a transformer 12, a pulse width control unit 13, a switching element 14, and a power output unit 15. When the power supply 1 is activated, the power factor correction unit 11 obtains an AC power supplied from an external power source 10, and performs rectification conversion and power factor adjustment on the AC power to generate DC power. The power factor correction unit 11 The DC power is output to the primary side of the transformer 12, and the pulse width control unit 13 outputs a pulse width modulation signal (commonly known as PWM signal) to the switching element 14, and the switching element 14 is subjected to the pulse width modulation signal. The opening and closing of the switching element 14 determines whether the primary side of the transformer 12 is turned on or off. When the switching element 14 is turned on, the primary side of the transformer 12 is turned on, so that the transformer 12 is turned on. The secondary side generates magnetic induction, transforms the DC power and outputs the power to the power output unit 15. At this time, the power output unit 15 directly outputs or re-converts the DC power, and supplies at least one working power to an external device. And a standing power. Further, the external device may be a motherboard or other electronic device, and the power output by the power output unit 15 is constructed under the ATX (Advanced Technology Extended) motherboard specification. In other words, the working power may be 12Vdc, 5Vdc, or 3.3Vdc in the ATX motherboard specification, this standing power can be 5Vsb in the ATX motherboard specification.

The power supply 1 is further divided into a pre-stage power supply circuit and a post-stage power supply circuit by the transformer 12. In short, the pre-stage power supply circuit is the power factor correction in the circuit of the power supply unit 1 The unit 11 is a circuit component on the primary side of the transformer 12, and the power supply circuit 1 is a circuit component of the secondary side of the transformer 12 to the power output unit 15 in the power supply unit 1. Moreover, the front stage power supply circuit has a first ground end 16, and the rear stage power supply circuit has a second ground end 17, the first ground end 16 and the second ground end 17 being different from each other. The power supply 1 generates a power output signal Power_good (or Vout) when the power is normally outputted, and the power output signal Power_good is also transmitted to the external device, and the external device uses the power output signal Power_good as the The basis for judging whether the power supply is normally powered.

As shown in FIG. 2, the inrush current recording module 2 of the present invention comprises a series circuit 20 and a sensing recording unit 21, wherein the series circuit 20 is formed by a capacitor 201 and a resistor 202. The two ends of the series circuit 20 are respectively connected to the first ground end 16 and the second ground end 17, and the serial connection order of the capacitor 201 and the resistor 202 can be adjusted according to implementation requirements or design. In one embodiment, the two ends of the capacitor 201 are respectively connected to the first ground end 16 and the resistor 202, and the two ends of the resistor 202 are respectively connected to the second ground end 17 and the capacitor 201, and in another In the embodiment, the two ends of the capacitor 201 are respectively connected to the second ground end 17 and the resistor 202, and the two ends of the resistor 202 are respectively connected to the first ground end 16 and the capacitor 201. Moreover, the capacitor 201 is arranged to solve the electromagnetic interference (EMI) problem generated in the operation of the power supply 1.

The sensing and recording unit 21 can be a micro control unit, and the sensing and recording unit 21 performs voltage sensing on the two ends of the resistor 202 to generate a voltage signal 22. Further, the sensing and recording unit of the present invention is further illustrated. The current flowing through the resistor 202 is detected, and the detected current is converted into the voltage signal 22 of the resistor 202 according to Ohm's law. In addition, the present invention can also cause the sensing recording unit 21 to detect the voltage difference between the two ends of the resistor 202 to generate the voltage signal 22. Moreover, the sensing and recording unit 21 can write a programming language, and preset a voltage determining level 23 for comparing the voltage signal 22, and the voltage determining level 23 can be further supported by the power supply 1 The maximum current is set. Further, the voltage determination level 23 can be obtained by converting the maximum current that the power supply 1 can withstand and the resistance value of the resistor 202 by Ohm's law. In addition, the sensing and recording unit 21 is further configured with a verification time 24 by the programming language, and the inspection time 24 is that the voltage signal 22 is greater than the voltage determination level 23 as a trigger condition, that is, The check time 24 is a time point 241 when the voltage signal 22 is greater than the voltage determination level 23, and the time period is started as a timing start. The time length of the check time 24 can be appropriately adjusted according to the implementation requirement. Take a second for example. Furthermore, the sensing and recording unit 21 may further select the micro control unit having a memory memory, or connect the micro control unit to a flash memory to enable the sensing and recording unit 21 to pass the program. The language is compiled with the function of data recording.

Referring to FIG. 2 to FIG. 5, during the power supply of the power supply 1 , the capacitor 201 in the series circuit 20 suppresses electromagnetic interference generated by the circuit of the power supply 1 . The flow of a surge current 3 generated by the abnormality of the external power source 10 into the power supply 1 is described in detail. The present invention will be described by way of a single example. When the surge current 3 enters the power supply 1 via the external power source 10, the surge current 3 passes through the front stage power supply circuit of the power supply 1 and from the first ground of the front stage power supply circuit The terminal 16 enters the series circuit 20, and the second ground terminal 17 connected to the series circuit 20 is returned to the external power source 10. However, when the inrush current 3 passes through the series circuit 20, the current of the series circuit 20 changes accordingly, meaning that the current flowing through the resistor 202 changes, and the current of the resistor 202 is due to the surge current 3 In addition, the sensing recording unit 21 that normally senses the voltage of the resistor 202 generates another voltage signal 25 different from the normal state, and the voltage signal 25 is greater than the voltage determining level 23, and The sensing recording unit 21 starts the timing of the checking time at the time point 241 when the voltage signal 22 is greater than the voltage determining level 23, and the sensing recording unit 21 is in the checking time 24 at this time. It is confirmed whether the power output signal Power_good generated by the power supply 1 can be obtained. If the sensing and recording unit 21 cannot obtain the power output signal Power_good before the end of the checking time 24, the inrush current 3 is recorded as A harmful surge current, which is the surge current 3 that instructs the power supply 1 to be abnormally powered and cannot operate normally. On the other hand, if the sensing recording unit 21 can still obtain the power output signal Power_good after the time of the checking time 24 is finished, the surge current 3 is recorded as a harmless surge current, in other words, the harmless surge. The current does not cause the power supply to operate abnormally. The sensing recording unit 21 of the present invention records each of the surge currents 3 during the power supply of the power supply 1 and distinguishes the harmful surge current or the harmless surge current. Thereby, for the future maintenance personnel to read the recording result of the sensing recording unit 21, it is determined whether the cause of the failure of the power supply 1 is caused by the harmful surge current.

Referring to FIG. 2 and FIG. 5, in order to prevent the power supply 1 from malfunctioning due to the harmful surge current, the sensing and recording unit 21 cannot obtain power and continue to work, and cannot accurately record each of the waves. The situation of inrush current 3 occurs. The power supply device 1 of the present invention further has a first power supply path for supplying at least one of the working power, and a second power supply path for supplying the standby power, and the inrush current recording module 2 Connecting the second power supply path to obtain the standing power for operation, and the surge current recording module 2 has a storage capacitor 26, the storage capacitor 26 has a state of charge for obtaining the standing power and being stored, and The normal electric power is obtained, and the discharge state of the electric power is output to the sensing recording unit 21. Specifically, in the present invention, when the power supply 1 is normally powered and the standby power is output, the storage capacitor 26 enters the charging state and stores a backup power when the power supply 1 is subjected to the harmful surge. When the normal power is not output, the storage capacitor 26 then enters the discharge state and outputs the backup power to the sensing recording unit 21 to continue the sensing recording unit 21 with the backup power. For a period of time, the sensing recording unit 21 can reliably record the harmful surge current. Furthermore, in order to limit the backup power output by the storage capacitor 26 to be used only by the sensing recording unit 21 and to prohibit recharging to the second power supply path, the inrush current recording module 2 has a connection. The unidirectional conduction element 27 of the second power supply path, in one embodiment, the unidirectional conduction element 27 can be a diode.

Referring to FIG. 2, the sensing and recording unit 21 of the present invention has two sensing circuits 211 and 212 respectively connected to one end of the resistor 202. For example, the sensing circuit 211 is connected to the resistor 202 and the The sensing circuit 212 is connected to the node of the resistor 202 and the second ground terminal 17. However, the sensing circuit 211, 212 is configured according to the resistor 202. The configuration is adjusted accordingly. In addition, the sensing and recording unit 21 further has a first signal receiving circuit 213 for obtaining the power output signal Power_good.

Referring to FIG. 2 and FIG. 5, the power supply 1 is based on a power-on signal Ps_on provided by the external device, that is, the power supply 1 needs to obtain the power-on signal Ps_on from the external device. The power supply is started, and the working power and the standing power are output. On the other hand, the sensing and recording unit 21 of the present invention can further have an enabling condition for recording by acquiring the booting signal through the programming language, that is, the sensing and recording unit 21 is only at the power supply. The recording is performed only when the device 1 is started, thereby avoiding the energy consumption problem caused by the normal recording of the sensing recording unit 21, and making the recording result closer to the power supply of the power supply 1. Moreover, the sensing recording unit 21 has a second signal receiving circuit 214 that accepts the power-on signal Ps_on.

In summary, the surge current recording module of the present invention is provided in a power supply, the power supply has a front stage power circuit and a rear stage power circuit, and the front stage power circuit has a first ground end, and thereafter The power supply circuit has a second ground end. The inrush current recording module comprises a series circuit and a sensing recording unit. The series circuit is composed of a capacitor and a resistor, and the two ends of the series circuit are respectively connected to the first ground end. And the second ground end, the sensing recording unit senses the resistance to generate a voltage signal, and compares the voltage signal with a voltage determining level, and when the voltage signal is greater than the voltage determining level, timing A check time is recorded and a harmful surge current or a harmless surge current is recorded based on whether or not an electric power output signal is obtained during the inspection time. Accordingly, it is determined whether the cause of the failure of the power supply is caused by the harmful surge current by providing a result of the recording of the sensing recording unit by the maintenance personnel in the future.

The present invention has been described in detail above, but the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Variations and modifications are still within the scope of the patents of the present invention.

1‧‧‧Power supply
11‧‧‧Power factor correction unit
12‧‧‧Transformers
13‧‧‧ Pulse Width Control Unit
14‧‧‧Switching elements
15‧‧‧Power output unit
16‧‧‧First ground
17‧‧‧Second ground
2‧‧‧ Surge current recording module
20‧‧‧ series circuit
201‧‧‧ Capacitance
202‧‧‧resistance
21‧‧‧Sensing unit
211, 212‧‧‧ sensing circuit
213‧‧‧First signal receiving circuit
214‧‧‧second signal receiving circuit
22‧‧‧Voltage signal
23‧‧‧Voltage judgment level
24‧‧‧Check time
241‧‧‧ time point
25‧‧‧Abnormal voltage signal
26‧‧‧ Storage Capacitor
27‧‧‧Single-way components
3‧‧‧Inrush current
Ps_on‧‧‧ boot signal
Power_good‧‧‧Power output signal

FIG. 1 is a schematic diagram showing the composition of a power supply circuit according to an embodiment of the present invention. 2 is a schematic diagram of a surge current recording module according to an embodiment of the invention. 3 is a schematic diagram of a surge current according to an embodiment of the present invention. 4 is a timing diagram of an embodiment of the present invention. FIG. 5 is a timing diagram of another embodiment of the present invention.

16‧‧‧First ground

17‧‧‧Second ground

2‧‧‧ Surge current recording module

20‧‧‧ series circuit

201‧‧‧ Capacitance

202‧‧‧resistance

21‧‧‧Sensing unit

211, 212‧‧‧ sensing circuit

213‧‧‧First signal receiving circuit

214‧‧‧second signal receiving circuit

26‧‧‧ Storage Capacitor

27‧‧‧Single-way components

3‧‧‧Inrush current

Claims (10)

A surge current recording module is disposed in a power supply, the power supply has a transformer, and the power supply has a pre-stage power supply circuit and a post-stage power supply circuit, and the pre-stage power supply The circuit has a first grounding end, and the rear-stage power supply circuit has a second grounding end different from the first grounding end. The power supply device generates a power output signal during normal power supply, and the surge current recording module The method includes: a series circuit formed by a capacitor and a resistor, the two ends of the series circuit are respectively connected to the first ground end and the second ground end; and a sensing recording unit, the two ends of the resistor The voltage sensing generates a voltage signal, the sensing recording unit presets a voltage judgment level for comparing the voltage signals, and a time point at which the voltage signal is greater than the voltage determination level is used as a timing starting point for checking Time, the sensing recording unit cannot obtain the power output signal before the end of the checking time, that is, record a harmful surge current, and after the checking time ends Obtaining the recording power output signal i.e. a surge current harmless. The surge current recording module of claim 1, wherein the power supply has a first power supply path for supplying at least one working power and a second power supply path for supplying a standby power to the power supply circuit. The inrush current recording module is connected to the second power supply path to obtain the standing power for operation, and has a storage capacitor, the storage capacitor has a charging state for obtaining the standing power and being stored, and a standby power cannot be obtained. And a discharge state of electric power is output to the sensing recording unit. The inrush current recording module of claim 2, wherein the inrush current recording module has a one-way conducting component connected to the second power supply path. The inrush current recording module of claim 1 or 2 or 3, wherein the two ends of the capacitor are respectively connected to the first ground end and the resistor, and the two ends of the resistor are respectively connected to the second ground end and The capacitor. The inrush current recording module of claim 4, wherein the sensing recording unit has two sensing circuits respectively connected to one end of the resistor, and a first signal receiving circuit that obtains the power output signal. The inrush current recording module of claim 5, wherein the power supply device receives a power-on signal from an external device to start power supply, and the sensing and recording unit has an enabling condition for recording the power-on signal. The inrush current recording module of claim 6, wherein the sensing recording unit has a second signal receiving circuit that accepts the power-on signal. The inrush current recording module of claim 1, wherein the sensing recording unit has two sensing circuits respectively connected to one end of the resistor, and a first signal receiving circuit that obtains the power output signal. The inrush current recording module of claim 1 or 2, wherein the power supply device receives a power-on signal from an external device to start power supply, and the sensing and recording unit has a power-on signal to obtain the power-on signal. Recorded enabling conditions. The inrush current recording module of claim 9, wherein the sensing recording unit has a second signal receiving circuit that accepts the power-on signal.