TWI506903B - To avoid the input voltage instability caused by external system abnormal circuit module - Google Patents

Description

Circuit module to avoid external system abnormality due to unstable input voltage

The invention relates to a circuit module for avoiding abnormality of an external system caused by instability of an input voltage, and in particular to a circuit module for avoiding damage or malfunction of a system.

In recent years, due to the rapid development of science and technology, the use of various electronic instruments and precision equipment has become increasingly common. Since these devices can only tolerate variations in the input power supply, it is easy to cause damage to electronic equipment and precision equipment. For example, if the power supply voltage is too high, the power equipment may be damaged, or if the voltage is too low, the power may be unstable. In the power distribution system, there are many users in each feeder. When there is heavy load input or disconnection on the feeder line, it will cause the voltage of the adjacent power supply to be unstable due to the change of the line voltage drop.

At present, the power supply is designed to reduce the large-scale voltage variation of the mains at a constant voltage output. Usually, a Bulk capacitor is added to the input voltage terminal to stabilize the input voltage. However, when the mains is powered off or the voltage drops, the Bulk capacitor continues to store energy because there is not enough energy, so that the voltage originally supplied by the Bulk capacitor drops so that the voltage at the final voltage output also drops. However, once the mains supply returns to a stable power supply, if the voltage at the voltage output terminal has not dropped to 0 volts and directly rises back to the original preset voltage value, the system connected to the voltage output terminal may be damaged or malfunction. The situation happened.

In view of this, the object of the present invention is to provide a circuit module that avoids an abnormality of an external system caused by instability of an input voltage, and ensures that the output voltage can be reduced to 0 volts when the power supply is unstable, and the output voltage is stabilized when the commercial power supply is stable. It can be restored to the original preset voltage value to avoid damage or malfunction of the system connected to the voltage output terminal.

In order to achieve the above or other objects, the present invention provides a circuit module for preventing an abnormality of an external system caused by an instability of an input voltage. The circuit module is coupled to a voltage input terminal and a voltage output terminal, respectively, and the utility power is mainly input through the voltage. The terminal provides power to the circuit module, and then the circuit module provides the converted power to the desired system via the voltage output. The circuit module includes an energy storage unit, a conversion unit, an excitation unit, a processing unit, and a disconnect unit. Wherein, when the power source of the voltage input terminal is unstable and the voltage supplied by the energy storage unit drops, the voltage at the voltage output terminal also decreases, and the disconnecting unit detects that the voltage at the voltage output terminal drops, and then Stopping the processing unit for a predetermined period of time, and then stopping the operation of the conversion unit, so that the voltage output terminal cannot supply voltage, and the power source of the voltage input terminal is stabilized and the energy storage unit is in the first The excitation unit voltage is provided after the preset time, so that the excitation unit causes the processing unit to re-operate, so that the conversion unit supplies a voltage to the voltage output end, and the second preset time is greater than the first preset time.

In summary, when the mains supply is unstable, the output voltage can be reduced to 0 volts. When the mains supply is stable, the output voltage can be restored to the original preset voltage. This will prevent the system connected to the voltage output from being damaged or malfunctioning.

10‧‧‧Circuit Module

100‧‧‧ Energy storage unit

110‧‧‧Transfer unit

120‧‧‧Stimulus unit

130‧‧‧Processing unit

140‧‧‧Disconnect unit

141‧‧‧ spare capacitor

20‧‧‧Voltage input

22‧‧‧Voltage output

1 is a schematic view of a first preferred embodiment of the present invention; and FIG. 2 is a schematic view of a second preferred embodiment of the present invention.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

Please refer to FIG. 1, which is a schematic diagram of a first preferred embodiment of the present invention. The circuit module (10) of the present invention is coupled to a voltage input terminal (20) and a voltage output terminal (22), and the utility power is mainly supplied to the circuit module (10) via the voltage input terminal (20). The circuit module (10) then supplies the converted power to the desired system (not shown) via the voltage output (22). The circuit module (10) includes an energy storage unit (100), a conversion unit (110), an excitation unit (120), a processing unit (130), and a disconnect unit (140).

The energy storage unit (100) can be coupled to the voltage input terminal (20), which can mainly store the mains power provided by the voltage input terminal (20), and the energy storage unit (100) can be a Bulk capacitor or the like. Equivalent component. The conversion unit (110) is respectively coupled to the energy storage unit (100) and the voltage output terminal (22), and the energy storage unit (100) can convert power into power available to the system via the conversion unit (110). And transmitting power to the system by the voltage output terminal (22), wherein the conversion unit can be Flyback or other equivalent component.

The excitation unit (120) can be coupled to the energy storage unit (100), and the excitation unit can be mainly a high voltage line or other equivalent component, and the energy storage unit (100) can provide a voltage higher than a preset voltage. The firing unit (120) can be caused to generate a signal. The processing unit (130) is respectively coupled to the excitation unit (120) and the conversion unit (110), the processing unit (130) can control the operation of the conversion unit (110), and the processing unit (130) can Is an IC processor or other equivalent component. The disconnecting unit (140) can be coupled to the processing unit (130) and the converting unit (110), respectively, and the disconnecting unit (140) has a spare capacitor (141) or other equivalent components.

Wherein, when the mains supply of the power source of the voltage input terminal (20) is suddenly unstable, the voltage that the energy storage unit (100) can provide is decreased, thereby affecting the conversion unit (110). The voltage supplied to the voltage output (22) also drops. At this time, the disconnecting unit (140) has a voltage condition capable of detecting the converting unit (110), and the disconnecting unit (140), once detecting the voltage drop of the converting unit (110), causes the The power stored by the backup capacitor (141) is provided for use by the processing unit (130). The power stored by the backup capacitor (141) can only provide the processing unit to operate for a first preset time, so that the processing unit (130) can be controlled to stop operating after the first preset time. When the processing unit (130) stops operating, the conversion unit (110) will also cease to operate, thereby causing the voltage output (22) to have no source of power, so the voltage will drop to zero volts.

Furthermore, when the commercial power source that supplies the voltage input terminal (20) returns to a stable state after a second preset time (the second preset time is greater than the first preset time), the energy storage unit at this time (100) The supplied voltage can be gradually increased to a normal value. When the energy storage unit (100) gradually increases the voltage that can be supplied, the excitation unit (120) can be operated to generate a signal to the processing unit (130), so that the processing unit (130) can resume operation to further promote The conversion unit (110) operates, and the conversion unit (110) continuously supplies power to the processing unit (130) to enable the processing unit (130) to operate continuously. Finally, the voltage output terminal (22) will regain the preset output voltage value for use by the mated system, and the disconnect unit (140) provides the voltage output terminal (22) for detecting the conversion unit (110). After the voltage has returned to the normal value, the disconnect unit (140) will stop controlling the processing unit (130), and the switching unit (110) can re-storage the backup capacitor (141).

Please refer to FIG. 2, which is a schematic diagram of a second preferred embodiment of the present invention. The circuit module (10) of the present invention is coupled to a voltage input terminal (20) and a voltage output terminal (22), and the utility power is mainly supplied to the circuit module (10) via the voltage input terminal (20). The circuit module (10) then supplies the converted power to the desired system (not shown) via the voltage output (22). The circuit module (10) includes an energy storage unit (100), a conversion unit (110), an excitation unit (120), a processing unit (130), and a disconnect unit (140).

The energy storage unit (100) can be coupled to the voltage input terminal (20), which can mainly store the mains power provided by the voltage input terminal (20), and the energy storage unit (100) Can be a Bulk capacitor or other equivalent component. The conversion unit (110) is respectively coupled to the energy storage unit (100) and the voltage output terminal (22), and the energy storage unit (100) can convert power into power available to the system via the conversion unit (110). The power is then transmitted to the system by the voltage output (22), wherein the conversion unit can be a flyback or other equivalent component.

The excitation unit (120) can be coupled to the voltage output terminal (20), and the excitation unit can be mainly a high voltage line or other equivalent component, and the voltage of the voltage input terminal (20) can be higher than a preset. At the voltage value, the excitation unit (120) can be caused to generate a signal. The processing unit (130) is respectively coupled to the excitation unit (120) and the conversion unit (110), the processing unit (130) can control the operation of the conversion unit (110), and the processing unit (130) can Is an IC processor or other equivalent component. The disconnecting unit (140) can be coupled to the processing unit (130) and the voltage output terminal (22), respectively, and the disconnecting unit (140) has a backup capacitor (141) or other equivalent component.

Wherein, when the mains supply of the power source of the voltage input terminal (20) is suddenly unstable, the voltage that the energy storage unit (100) can provide is decreased, thereby affecting the conversion unit (110). The voltage supplied to the voltage output (22) also drops. At this time, the disconnecting unit (140) has a voltage condition capable of detecting the converting unit (110), and the disconnecting unit (140), once detecting the voltage drop of the converting unit (110), causes the The power stored by the backup capacitor (141) is provided for use by the processing unit (130). The power stored by the backup capacitor (141) can only provide the processing unit for operation within a first preset time, thus The processing unit (130) can be controlled to stop operating after the first predetermined time. When the processing unit (130) stops operating, the conversion unit (110) will also cease to operate, thereby causing the voltage output (22) to have no source of power, so the voltage will drop to zero volts.

Furthermore, when the commercial power source that supplies the voltage input terminal (20) returns to the steady state after a second preset time (the second preset time is greater than the first preset time), the excitation unit (120) The operation can generate a signal, and at this time, the energy storage unit (100) can gradually increase the supplied voltage to a normal value. The signal generated by the operation of the excitation unit (120) can be transmitted to the processing unit (130), so that the processing unit (130) can resume operation, and the processing unit (130) further causes the conversion unit (110) to operate. And the conversion unit (110) continuously supplies power to the processing unit (130) to enable the processing unit (130) to operate continuously. Finally, the voltage output terminal (22) will regain the preset output voltage value for use by the mated system, and the disconnect unit (140) provides the voltage output terminal (22) for detecting the conversion unit (110). The voltage of the circuit will stop controlling the processing unit (130) after returning to the normal value, and the conversion unit (110) can re-storage the backup capacitor (141)

The invention mainly emphasizes that when the mains electricity is unstable, the voltage of the voltage output terminal (22) can be forcibly reduced to 0 volts, and then the voltage is raised to the initial supply voltage, and the system damage can be avoided. Or a malfunction occurs.

Although the present invention has been disclosed above in the preferred embodiments, it is not intended to limit the present invention. The invention is to be understood as being limited by the scope of the appended claims.

10‧‧‧Circuit Module

100‧‧‧ Energy storage unit

110‧‧‧Transfer unit

120‧‧‧Stimulus unit

130‧‧‧Processing unit

140‧‧‧Disconnect unit

141‧‧‧ spare capacitor

20‧‧‧Voltage input

22‧‧‧Voltage output

Claims (10)

The circuit module is configured to be connected to a voltage input end and a voltage output end, and the circuit module includes: an energy storage unit coupled to the voltage An input unit; a conversion unit coupled to the energy storage unit and the voltage output end; an excitation unit coupled to the energy storage unit; a processing unit coupled to the excitation unit and the conversion And a disconnecting unit coupled to the processing unit and the converting unit; wherein when the power source of the voltage input terminal is unstable, the voltage supplied by the energy storage unit is decreased, and the voltage of the voltage output terminal is also When the disconnection unit detects that the voltage at the voltage output is decreased, the processing unit is stopped for a first preset time, and then the voltage output terminal is disabled after the conversion unit stops operating. Providing a voltage, and the power source of the voltage input terminal is stabilized, and the energy storage unit provides the excitation unit voltage after a second predetermined time, so that the excitation unit causes the location Re-operation unit, thereby enabling the conversion unit provides a voltage to the voltage output terminal, and the second predetermined time is greater than the first predetermined time. A circuit module for avoiding an abnormality of an external system caused by instability of an input voltage as described in claim 1, wherein the energy storage unit is a Bulk capacitor. A circuit module for avoiding an abnormality of an external system caused by instability of an input voltage as described in claim 2, wherein the conversion unit is a feedback circuit. Avoid external system instability as described in item 3 of the patent application scope An abnormal circuit module, wherein the processing unit is an IC processor. A circuit module for avoiding an abnormality of an external system caused by instability of an input voltage as described in claim 4, wherein the disconnecting unit has a backup capacitor. The circuit module is configured to be connected to a voltage input end and a voltage output end, and the circuit module includes: an energy storage unit coupled to the voltage An input unit; the conversion unit is coupled to the energy storage unit and the voltage output end; an excitation unit coupled to the voltage input end; a processing unit coupled to the excitation unit and the conversion And a disconnecting unit coupled to the processing unit and the converting unit; wherein, when the power source of the voltage input terminal is unstable, causing the voltage provided by the energy storage unit to decrease, the voltage of the voltage output terminal It will also fall. After the disconnection unit detects the voltage drop at the voltage output terminal, the processing unit will be stopped after a first preset time, and then the voltage output terminal will be disabled after the conversion unit stops operating. Providing a voltage, and the power source of the voltage input terminal stably supplies the excitation unit voltage after a second predetermined time, so that the excitation unit causes the processing unit to re-operate The conversion unit further providing a voltage to the voltage output terminal, and the second predetermined time is greater than the first predetermined time. A circuit module for avoiding an abnormality of an external system caused by instability of an input voltage as described in claim 6 of the patent application, wherein the energy storage unit is a Bulk capacitor. Avoid external system instability as described in item 7 of the patent application scope An abnormal circuit module, wherein the conversion unit is a feedback circuit. A circuit module for avoiding an abnormality of an external system caused by instability of an input voltage as described in claim 8 of the patent application, wherein the processing unit is an IC processor. A circuit module for avoiding an abnormality of an external system caused by instability of an input voltage as described in claim 9 of the patent application, wherein the disconnecting unit has a backup capacitor.