CN211580261U - Single-fire switch device - Google Patents
Single-fire switch device Download PDFInfo
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- CN211580261U CN211580261U CN201922230239.9U CN201922230239U CN211580261U CN 211580261 U CN211580261 U CN 211580261U CN 201922230239 U CN201922230239 U CN 201922230239U CN 211580261 U CN211580261 U CN 211580261U
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Abstract
The utility model is suitable for a switching device technical field especially relates to a single fire switching device, include phase-cutting unit, rectification unit, get electric the control unit, energy storage unit, steady voltage unit, start reinforcing unit and comparison the control unit. When the voltage stabilizing unit does not establish the target voltage, the startup enhancing unit and the comparison control unit act together to enable the phase cutting unit to maintain the off state all the time, the voltage stabilizing unit is ensured to establish the target voltage quickly, and after the voltage stabilizing unit establishes the target voltage, the startup enhancing unit can stop working immediately, and the success rate of powering on the single-fire switch device for the small-wattage load lamp in the on state is ensured.
Description
Technical Field
The utility model is suitable for a switching device technical field especially relates to a single fire switching device.
Background
The single-live switch device is a wall switch device with only one live wire introduced into the wall, and due to the particularity of power taking, the current popular scheme on the market is divided into an on-state power taking circuit and an off-state power taking circuit according to the switching of the states of the wall switch device, namely, a circuit when a load lamp is turned on and a circuit when the load lamp is turned off.
The off-state power taking circuit is generally an isolation flyback or non-isolation buck switching circuit, and the switching power supply has strong dynamic performance and loading capacity and can provide enough electric quantity for a subsequent intelligent module. The on-state electricity taking circuits are different and comprise phase-cut electricity taking circuits, silicon controlled phase adjustment electricity taking circuits or half-wave three-terminal voltage stabilizing circuits, and the circuits cannot intercept commercial power current to a large extent in order to ensure the normal work of a load lamp, so that the load capacity of the load lamp is very weak.
For the intelligent module, the initialization process of the MCU is required at the moment of starting, and the power consumption of the transceiving process is very different from that of the general operation because of the particularity of the wireless transceiving signal. Therefore, when the whole switch is in a state that the load lamp is on at the moment of starting, the power taking capability of the on-state power taking circuit can seriously affect whether the intelligent module can be normally started. This drawback is further amplified if the load carried at this time is small, for example a 3W bulb.
Referring to fig. 1, the conventional single fire switch device is composed of a phase-cut circuit 1, a rectifier circuit 2, a power-taking control circuit 3, a comparison control circuit 4, an energy storage circuit 5 and a voltage stabilizing circuit 6, wherein conduction of the phase-cut circuit 1 is controlled by the comparison control circuit 3, when an MOS transistor inside the phase-cut circuit is not conducted, a mains voltage passes through a rectifier unit 2 and then charges an electrolytic capacitor EC1 of the energy storage circuit 5, and when the voltage of the electrolytic capacitor EC1 rises to a certain value, the voltage stabilizing circuit 6 is started to finally output a target voltage required by an intelligent module. When the voltage peak value on the electrolytic capacitor EC1 reaches the set value of the power-taking control circuit 3, the output end of the comparator US of the comparison control circuit 4 outputs a high level to the phase-cut circuit 1, so that the MOS transistor is turned on, and the rectifying unit 2 stops working. At this time, the transistor Q1 is turned on, so that the voltage at the negative phase input terminal of the comparator US is pulled down to the midpoint voltage of the resistor R1 and the resistor R2, and the comparison control circuit 4 forms a fixed hysteresis loop.
However, since the voltage of the voltage stabilizing circuit 6 provides the target voltage to the negative phase input terminal of the comparator US, during the power-on process, the establishment time of the target voltage is closely related to the conduction time of the rectifying unit 2, that is, the longer the conduction time of the phase cut circuit 1 is, the slower the establishment of the target voltage is. On the other hand, the slower the target voltage is established, resulting in the positive phase input of the comparator US being always larger than the negative phase input, the comparator US always turning on the signal to the MOS transistor. This process creates a logical contradiction point, and the slower the target voltage is established, the slower this process will be caused by the results of system operation. Therefore, the on-state power-on success rate of the existing single-fire switch device is very low, and the power supply requirement of a small-wattage load lamp cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model provides a single fire switching device aims at solving current single fire switching device's the on-state power-on success rate very low, can't satisfy the problem of the power supply demand of little wattage load lamp.
The utility model is realized in such a way, the utility model provides a single fire switch device, which comprises a phase-cutting unit, a rectifying unit, a power-taking control unit, an energy storage unit, a voltage stabilizing unit, a start enhancing unit and a comparison control unit; the phase-cutting unit is respectively connected with the rectifying unit, the comparison control unit and the live wire, the electricity-taking control unit is respectively connected with the rectifying unit, the comparison control unit and the start enhancing unit, the start enhancing unit is also respectively connected with the comparison control unit, the energy storage unit and the voltage stabilizing unit, and the energy storage unit is also connected with the voltage stabilizing unit; the starting enhancement unit is used for keeping the working state of the phase cutting unit off when the voltage stabilizing unit does not establish the target voltage, and stopping working after the voltage stabilizing unit outputs the target voltage.
Furthermore, the starting enhancement unit comprises a first control module, a second control module and an energy storage module; the first control module is connected with the power taking control unit, the second control module and the energy storage module and is used for transmitting direct current to the energy storage module when receiving the direct current transmitted by the rectifying unit; the second control module is also connected with the voltage stabilizing unit and the energy storage module and is used for being matched with the first control module after the voltage stabilizing unit outputs a target voltage so as to control the energy storage module to stop working; the energy storage module is also connected with the comparison control unit and used for storing energy under the control action of the first control module, providing comparison voltage to the comparison control unit and stopping working under the matching action of the first control module and the second control module.
Further, first control module includes first triode, first resistance and second resistance, second control module is the second triode, energy storage module is first electric capacity, the base of first triode is connected first resistance one end, the collecting electrode of first triode is connected respectively get electric control unit with second resistance one end, the projecting pole of first triode is connected first electric capacity one end, the first resistance other end is connected respectively the second resistance other end with the collecting electrode of second triode, the base of second triode is connected the voltage regulation unit, the projecting pole of second triode is connected respectively the first electric capacity other end and earthing terminal.
Furthermore, the start enhancing unit further comprises a protection module, wherein the protection module is connected with the first triode, the second triode and the first capacitor and used for controlling the first capacitor to stop storing energy after the stored electric energy reaches the preset electric energy when the first triode is conducted.
Furthermore, the protection module comprises a first voltage-regulator tube and a third resistor, wherein the negative electrode of the first voltage-regulator tube is respectively connected with one end of the third resistor, one end of the first capacitor and the emitter of the first triode, and the positive electrode of the first voltage-regulator tube is respectively connected with the other end of the third resistor and the other end of the first capacitor.
Further, the comparison control unit comprises a comparator, a third triode, a fourth resistor, a fifth resistor and a first diode, wherein a positive phase input end of the comparator is connected with the electricity taking control unit, a negative phase input end of the comparator is connected with the starting enhancement unit, one end of the fourth resistor and one end of the fifth resistor respectively, an output end of the comparator is connected with the phase cutting unit and a base electrode of the third triode respectively, the other end of the fourth resistor is connected with a negative electrode of the first diode, a positive electrode of the first diode is connected with the voltage stabilizing unit, the other end of the fifth resistor is connected with a collector electrode of the third triode, and an emitter electrode of the third triode is connected with a grounding end.
Furthermore, the power-taking control unit comprises a second voltage-regulator tube, a second capacitor and a sixth resistor, the negative electrode of the second voltage-regulator tube is respectively connected with the rectifying unit and the start enhancing unit, the positive electrode of the second voltage-regulator tube is respectively connected with the positive phase input end of the comparator, one end of the second capacitor and one end of the sixth resistor, and the other end of the second capacitor is respectively connected with the other end of the sixth resistor and the grounding end.
Furthermore, the rectifying unit is a second diode, the cathode of the second diode is connected with the cathode of the second voltage regulator tube, and the anode of the second diode is connected with the phase cutting unit.
Furthermore, the phase cutting unit comprises an MOS (metal oxide semiconductor) tube and a third diode connected with the MOS tube.
Still further, the energy storage unit comprises at least one electrolytic capacitor.
The beneficial effects of the utility model reside in that, compared with the prior art, the utility model discloses a design a single fire switching device, including the unit of cutting the looks, the rectification unit, get the electric control unit, the energy storage unit, the steady voltage unit, start reinforcing unit and comparative control unit, when starting, the operating condition of cutting the looks unit is the disconnection, the operating condition that starts reinforcing unit and maintain the unit of cutting the looks is the disconnection, the direct current transmission after the rectification unit will rectify is to the energy storage unit, the energy storage unit energy storage fast makes steady voltage unit output target voltage, start reinforcing unit and no longer work according to the target voltage who receives this moment, and, comparative control unit control is cut looks unit switching operating condition and is for switching on, make the rectification unit disconnection. When the voltage stabilizing unit does not establish the target voltage, the startup enhancing unit and the comparison control unit act together to enable the phase cutting unit to maintain the off state all the time, the voltage stabilizing unit is ensured to establish the target voltage quickly, and after the voltage stabilizing unit establishes the target voltage, the startup enhancing unit can stop working immediately, and the success rate of powering on the single-fire switch device for the small-wattage load lamp in the on state is ensured.
Drawings
FIG. 1 is a circuit diagram of a prior art live switchgear;
fig. 2 is a block diagram of a single fire switch device according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a single fire switch device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model discloses a design a single fire switching device, including cutting looks unit 10, rectification unit 20, get electric control unit 30, energy storage unit 40, voltage stabilizing unit 50, start reinforcing unit 60 and comparative control unit 70, when starting, the operating condition of cutting looks unit 10 is the disconnection, it maintains the operating condition of cutting looks unit 10 for the disconnection to start reinforcing unit 60, direct current after rectification unit 20 transmits the energy storage unit 40 with the rectification, energy storage unit 40 stores energy fast and makes voltage stabilizing unit 50 output target voltage, start reinforcing unit 60 and no longer work according to the target voltage who receives this moment, and, comparative control unit 70 control cuts looks unit 10 and switches operating condition for switching on, make rectification unit 20 break off. When the voltage stabilizing unit 50 does not establish the target voltage, the startup enhancing unit 60 and the comparison control unit 70 work together to enable the phase cutting unit 10 to maintain the off state all the time, so as to ensure that the voltage stabilizing unit 50 establishes the target voltage quickly, and after the voltage stabilizing unit 50 establishes the target voltage, the startup enhancing unit 60 can stop working immediately, so as to ensure the success rate of powering on the single-fire switch device in the on state for the low-wattage load lamp.
Example one
Referring to fig. 2, the first embodiment provides a single-fire switch apparatus, which includes a phase-cut unit 10, a rectifying unit 20, a power-taking control unit 30, an energy storage unit 40, a voltage stabilizing unit 50, a start-up enhancing unit 60, and a comparison control unit 70;
the phase-cutting unit 10 is connected to the rectifying unit 20, the comparison control unit 70 and the live wire 100, and is configured to switch the operating state according to a control signal of the comparison control unit 70, so that the rectifying unit 20 switches the operating state;
the rectifying unit 20 is further connected to the power-taking control unit 30, and is configured to switch the operating state to be on when the phase-cutting unit 10 switches the operating state to be off, and switch the operating state to be off when the phase-cutting unit 10 switches the operating state to be on;
the power-taking control unit 30 is further connected to the comparison control unit 70, the start-up enhancing unit 60 and the energy storage unit 40, and is configured to provide a reference voltage to the comparison control unit 70 and transmit the electricity of the live wire 100 to the start-up enhancing unit 60 and the energy storage unit 40;
the energy storage unit 40 is further connected to the voltage stabilizing unit 50, and is configured to transmit the stored electric energy to the voltage stabilizing unit 50, so that the voltage stabilizing unit 50 outputs a target voltage;
the start-up enhancing unit 60 is further connected to the comparison control unit 70 and the voltage stabilizing unit 50, and is configured to provide a comparison voltage to the comparison control unit 70 when the operating state of the rectifying unit 20 is on, so that the operating state of the phase-cutting unit 10 is off, and stop operating after the voltage stabilizing unit 50 outputs the target voltage;
the comparison control unit 70 is further connected to the voltage stabilizing unit 50, and is configured to output a control signal to the phase cutting unit 10 according to the reference voltage and the comparison voltage, so that the operating state of the phase cutting unit 10 is off, and output a control signal to the phase cutting unit 10 after the voltage stabilizing unit 50 outputs the target voltage, so that the operating state of the phase cutting unit 10 is on.
At the moment of starting a load device connected to the single live switch device, the phase-cut unit 10 is in a disconnected working state, electricity in the live wire 100 passes through the load device and is transmitted to the rectifying unit 20, the rectifying unit 20 switches the working state to a connected state, the rectifying unit 20 rectifies the electricity into direct current and transmits the direct current to the electricity-taking control unit 30, and the electricity-taking control unit 30 provides a reference voltage to the comparison control unit 70. Also, the rectifying unit 20 transmits the direct current to the start-up enhancing unit 60 through the power-taking control unit 30, and the start-up enhancing unit 60 supplies the comparison voltage to the comparison control unit 70. After receiving the reference voltage and the comparison voltage, the comparison control unit 70 outputs a control signal to the phase cutting unit 10 to maintain the operating state of the phase cutting unit 10 to be off, thereby maintaining the operating state of the rectifying unit 20 to be on.
When the rectifying unit 20 is turned on, it transmits the dc power to the energy storage unit 40 through the power-taking control unit 30, and the energy storage unit 40 stores the energy rapidly under the action of the dc power, so that the voltage stabilizing unit 50 outputs the target voltage when the preset electric energy is reached. The voltage stabilizing unit 50 transmits the target voltage to the start-up enhancing unit 60 and the comparison control unit 70, respectively, wherein the start-up enhancing unit 60 stops working after receiving the target voltage, and the comparison control unit 70 outputs a control signal to the phase cutting unit 10 again after receiving the target voltage, so that the working state of the phase cutting unit 10 is switched to be on. When the phase-cut unit 10 is turned on, the rectifying unit 20 is turned off, and the live wire 100 is no longer electrically transmitted to the power-taking control unit 30.
After the single-fire switch device provided by the embodiment of the utility model is started, the power-taking control unit 30 and the start-up enhancing unit 60 are matched with each other, and respectively transmit reference voltage and comparison voltage to the comparison control unit 70, under the control action of the comparison control unit 70, the phase-cutting unit 10 is always in a disconnected state before the voltage stabilizing unit 50 does not establish target voltage, so that the voltage stabilizing unit 50 can quickly establish the target voltage; after the voltage stabilizing unit 50 establishes the target voltage, the target voltage is respectively transmitted to the start-up enhancing unit 60 and the comparison control unit 70, and then the start-up enhancing unit 60 stops working without affecting the working of other units, the comparison control unit 70 controls the phase-cutting unit 10 to switch to the on state, and the rectifying unit 20 also switches to the off state. The whole on-state power taking process has no logic contradiction, and the on-state power-on starting success rate can be ensured even if the load device is a small-wattage load device.
The embodiment of the utility model provides an in, load device is the load lamp, and target voltage is 3.3V, and target voltage can be for the power supply of load lamp.
Example two
Referring to fig. 3, in the single fire switch device provided in the second embodiment, the start enhancing unit 60 includes a first control module, a second control module and an energy storage module;
the first control module is connected with the power-taking control unit 30, the second control module and the energy storage module, and is used for transmitting the direct current to the energy storage module when receiving the direct current transmitted by the rectifying unit 20;
the second control module is also connected with the voltage stabilizing unit 50 and the energy storage module, and is used for being matched with the first control module after the voltage stabilizing unit 50 outputs the target voltage so as to control the energy storage module to stop working;
the energy storage module is further connected to the comparison control unit 70, and is configured to store energy under the control of the first control module, provide a comparison voltage to the comparison control unit 70, and stop working under the cooperation of the first control module and the second control module.
After the operating state of the rectifying unit 20 is switched to be on, the rectifying unit 20 transmits the rectified dc power to the first control module, the first control module transmits the dc power to the energy storage module, the energy storage module stores energy, and provides a comparison voltage to the comparison control unit 70. The comparison control unit 70 transmits a control signal to the phase cutting unit 10 according to the reference voltage received from the power take-off control unit 30 and the comparison voltage received from the energy storage module to maintain the operation state of the phase cutting unit 10 off, so that the operation state of the rectifying unit 20 is maintained on.
After the voltage stabilizing unit 50 outputs the target voltage, the second control module receives the target voltage, and the second control module cooperates with the first control module to stop the energy storage module from storing energy and stop working, so as not to provide a comparison voltage for the comparison control unit 70. Subsequently, the comparison control unit 70 outputs a control signal to the phase cutting unit 10 again to switch the operation state of the phase cutting unit 10 to on, so that the operation state of the rectifying unit 20 is switched to off.
Before the voltage stabilizing unit 50 does not establish the target voltage, the phase cutting unit 10 can be kept in the off state by starting the enhancing unit 60, the phase cutting unit 10 can be kept in the off state, the rectifying unit 20 can be kept in the on state, and the direct current is continuously transmitted to the energy storage unit 40, so that the energy storage unit 40 can rapidly store the electric energy, and the voltage stabilizing unit 50 can rapidly establish the target voltage. Moreover, after the voltage stabilizing unit 50 establishes the target voltage, the start-up enhancing unit 60 stops working, and the control logic of the subsequent process is not affected.
EXAMPLE III
Referring to fig. 3, in the single-fire switch device provided in this embodiment, the first control module includes a first transistor Q1, a first resistor R1 and a second resistor R2, the second control module is a second transistor Q2, the energy storage module is a first capacitor C1, a base of the first transistor Q1 is connected to one end of a first resistor R1, a collector of the first transistor Q1 is connected to one end of the power-taking control unit 30 and one end of the second resistor R2, an emitter of the first transistor Q1 is connected to one end of the first capacitor C1, another end of the first resistor R1 is connected to another end of the second resistor R2 and a collector of the second transistor Q2, a base of the second transistor Q2 is connected to the voltage stabilizing unit 50, and an emitter of the second transistor Q2 is connected to another end of the first capacitor C1 and a ground terminal.
After the operation state of the rectifying unit 20 is switched to be conductive, the rectifying unit 20 transmits the rectified dc power to the first transistor Q1, the first transistor Q1 is turned on by the first resistor R1 and the second resistor R2, and the voltage of the first capacitor C1 gradually rises under the action of the dc power and stores the electric energy. The first capacitor C1 transmits the stored electrical energy to the comparison control unit 70, i.e. provides the comparison control unit 70 with a comparison voltage. The comparison control unit 70 transmits a control signal to the phase cutting unit 10 according to the reference voltage received from the power take-off control unit 30 and the comparison voltage received from the first capacitor C1 to maintain the operation state of the phase cutting unit 10 off, so that the operation state of the rectifying unit 20 is maintained on.
After the voltage stabilizing unit 50 outputs the target voltage, the target voltage is transmitted to the second transistor Q2, so that the second transistor Q2 is turned on. The conduction of the second transistor Q2 pulls down the base voltage of the first transistor Q1, so that the first transistor Q1 is turned off, the voltage of the first capacitor C1 does not rise any more, and the storage of electric energy is stopped, and no comparison voltage is provided to the comparison control unit 70. Subsequently, the comparison control unit 70 outputs a control signal to the phase cutting unit 10 again to switch the operation state of the phase cutting unit 10 to on, so that the operation state of the rectifying unit 20 is switched to off.
Example four
Referring to fig. 3, in the single fire switch device provided in the fourth embodiment, the start-up enhancing unit 60 further includes a protection module, and the protection module is connected to the first transistor Q1, the second transistor Q2 and the first capacitor C1, and is configured to control the first capacitor C1 to stop storing energy when the stored energy reaches the preset energy when the first transistor Q1 is turned on.
After the operating state of the rectifying unit 20 is switched to be conductive, the rectifying unit 20 transmits the rectified dc power to the first transistor Q1, and the first transistor Q1 is turned on by the first resistor R1 and the second resistor R2 to transmit the dc power to the first capacitor C1, so that the voltage of the first capacitor C1 gradually rises. As the voltage of the first capacitor C1 rises, under the action of the protection module, the first capacitor C1 stops storing energy after the stored energy reaches the preset energy, so as to prevent the comparison control unit 70 from being damaged by the over-high voltage of the first capacitor C1.
EXAMPLE five
Referring to fig. 3, in the single-fire switching device provided in this embodiment, the protection module includes a first voltage regulator tube Z1 and a third resistor R3, a negative electrode of the first voltage regulator tube Z1 is respectively connected to one end of the third resistor R3, one end of a first capacitor C1, and an emitter of a first triode Q1, and a positive electrode of the first voltage regulator tube Z1 is respectively connected to the other end of the third resistor R3 and the other end of the first capacitor C1.
And setting the voltage value of the first voltage-regulator tube Z1, gradually increasing the voltage of the first capacitor C1, transmitting the voltage of the first capacitor C1 to the cathode of the first voltage-regulator tube Z1, and conducting the first voltage-regulator tube Z1 when the voltage of the cathode of the first voltage-regulator tube Z1 reaches a certain value. When the voltage of the first capacitor C1 exceeds the set voltage value of the first regulator tube Z1, the first regulator tube Z1 breaks down in the reverse direction, so as to prevent the comparison control unit 70 from being damaged by the over-high voltage of the first capacitor C1.
EXAMPLE six
Referring to fig. 3, in the single fire switching device according to the sixth embodiment, the comparison control unit 70 includes a comparator U1, a third transistor Q3, a fourth resistor R4, a fifth resistor R5, and a first diode D1, a positive phase input terminal of the comparator U1 is connected to the power-taking control unit 30, a negative phase input terminal of the comparator U1 is connected to one end of the start-up enhancing unit 60, one end of the fourth resistor R4, and one end of the fifth resistor R5, an output terminal of the comparator U1 is connected to bases of the phase-cutting unit 10 and the third transistor Q3, another end of the fourth resistor R4 is connected to a negative electrode of the first diode D1, a positive electrode of the first diode D1 is connected to the voltage stabilizing unit 50, another end of the fifth resistor R5 is connected to a collector of the third transistor Q3, and an emitter of the third transistor Q3 is connected to.
The power-taking control unit 30 provides a reference voltage to the positive-phase input terminal of the comparator U1, the first capacitor C1 of the start-up enhancement unit 60 provides a comparison voltage to the negative-phase input terminal of the comparator U1, so that the voltage at the positive-phase input terminal of the comparator U1 is smaller than that at the negative-phase input terminal, and the output terminal of the comparator U1 outputs a low level to the phase-cut unit 10. And the phase cutting unit 10 maintains the operation state as off after receiving the low level.
After the voltage stabilizing unit 50 outputs the target voltage, the target voltage is transmitted to the first diode D1, the first diode D1 is turned on, the target voltage is transmitted to the negative phase input terminal of the comparator U1, the voltage at the positive phase input terminal of the comparator U1 is greater than that at the negative phase input terminal, and the output terminal of the comparator U1 outputs a high level to the phase cutting unit 10. And the phase cutting unit 10 switches the operation state to be conductive after receiving the high level. In addition, the comparator U1 outputs a high level to the base of the third transistor Q3 to turn on the third transistor Q3, the fourth resistor R4 and the fifth resistor R5 perform a voltage division function, so as to pull down the voltage at the negative phase input end of the comparator U1 to the midpoint voltage of the fourth resistor R4 and the fifth resistor R5, so that the comparison control unit 70 forms a fixed hysteresis loop, the voltage at the positive phase input end of the comparator U1 is greater than that at the negative phase input end, and the output end of the comparator U1 keeps outputting a high level.
EXAMPLE seven
Referring to fig. 3, in the single fire switching device provided by the seventh embodiment, the power-taking control unit 30 includes a second voltage-regulator tube Z2, a second capacitor C2 and a sixth resistor R6, a negative electrode of the second voltage-regulator tube Z2 is connected to the rectifying unit 20 and the start-up enhancing unit 60 respectively, a positive electrode of the second voltage-regulator tube Z2 is connected to a positive-phase input terminal of the comparator U1, one end of the second capacitor C2 and one end of the sixth resistor R6 respectively, and the other end of the second capacitor C2 is connected to the other end of the sixth resistor R6 and a ground terminal respectively.
The voltage value of the second regulator tube Z2 is set, and when the operating state of the rectifying unit 20 is switched to on, the rectifying unit 20 transmits the direct current to the negative electrode of the second regulator tube Z2. When the negative voltage of the second regulator tube Z2 reaches a certain value, the second regulator tube Z2 starts to be turned on, the voltage of the second capacitor C2 starts to rise slowly, and the voltage is transmitted to the non-inverting input terminal of the comparator U1, and is the reference voltage. At this time, the first capacitor C1 of the start-up enhancing unit 60 provides a comparison voltage for the negative phase input terminal of the comparator U1, the voltage at the positive phase input terminal of the comparator U1 is smaller than that at the negative phase input terminal, the output terminal of the comparator U1 outputs a low level to the phase cutting unit 10, and the operation state of the phase cutting unit 10 is maintained to be off.
When the voltage stabilizing unit 50 outputs the target voltage to the first diode D1, the first diode D1 is turned on, and the target voltage is transmitted to the negative phase input terminal of the comparator U1. At this time, the second capacitor C2 provides a reference voltage for the positive phase input terminal of the comparator U1, the voltage of the positive phase input terminal of the comparator U1 is greater than that of the negative phase input terminal, the output terminal of the comparator U1 outputs a high level to the phase cutting unit 10, and the operation state of the phase cutting unit 10 is switched to on.
Example eight
Referring to fig. 3, in the single fire switchgear provided in the eighth embodiment, the rectifying unit 20 is a second diode D2, a cathode of the second diode D2 is connected to a cathode of the second voltage regulator tube Z2, and an anode of the second diode D2 is connected to the phase-cut unit 10. When the phase cutting unit 10 is in the off state, the second diode D2 is in the on state, and transmits the electricity of the live wire 100 to the second regulator tube Z2, the start-up enhancing unit 60, and the energy storage unit 40. When the phase cutting unit 10 is turned on, the second diode D2 is turned off, and the live line 100 is interrupted from transmitting electricity.
Further, referring to fig. 3, the phase cutting unit 10 includes a MOS transistor and a third diode connected to the MOS transistor. When the alternating current is in the positive half cycle, the output end of the comparator U1 outputs high level, the MOS tube is conducted, and then the second diode D2 is disconnected; the output end of the comparator U1 outputs low level, the MOS tube is disconnected, and then the second diode D2 is conducted. And the third diode is conducted during the negative half cycle of the alternating current.
In the embodiment of the present invention, the voltage stabilizing unit 50 is an LDO (low dropout regulator) circuit, which is a low dropout linear voltage stabilizing circuit, and the voltage is stabilized and converted into the target voltage after receiving the voltage transmitted by the energy storing unit 40.
Further, referring to fig. 3, the energy storage unit 40 includes at least one electrolytic capacitor E1, one end of the electrolytic capacitor E1 is connected to the cathode of the second diode D2 and the voltage stabilizing unit 50, and the other end of the electrolytic capacitor E1 is connected to the ground. When the second diode D2 is turned on, the electrolytic capacitor E1 gradually stores energy, and transmits the stored energy to the voltage stabilizing unit 50, and the voltage stabilizing unit 50 outputs a target voltage after stabilizing the voltage.
Further, referring to fig. 3, the single fire switch device further includes an electrolytic capacitor E2, one end of the electrolytic capacitor E2 is connected to the voltage regulator unit 50, and the other end is connected to the ground, and the electrolytic capacitor E2 can ensure the output of the voltage regulator unit 50 to be stable.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A single-fire switch device is characterized by comprising a phase-cutting unit, a rectifying unit, a power-taking control unit, an energy storage unit, a voltage stabilizing unit, a starting enhancement unit and a comparison control unit;
the phase-cutting unit is respectively connected with the rectifying unit, the comparison control unit and the live wire, the electricity-taking control unit is respectively connected with the rectifying unit, the comparison control unit and the start enhancing unit, the start enhancing unit is respectively connected with the comparison control unit, the energy storage unit and the voltage stabilizing unit, and the energy storage unit is also connected with the voltage stabilizing unit;
the starting enhancement unit is used for keeping the working state of the phase cutting unit off when the voltage stabilizing unit does not establish the target voltage, and stopping working after the voltage stabilizing unit outputs the target voltage.
2. The single fire switching device according to claim 1 wherein said start-up enhancement unit comprises a first control module, a second control module, and an energy storage module;
the first control module is connected with the power taking control unit, the second control module and the energy storage module and is used for transmitting direct current to the energy storage module when receiving the direct current transmitted by the rectifying unit;
the second control module is also connected with the voltage stabilizing unit and the energy storage module and is used for being matched with the first control module after the voltage stabilizing unit outputs a target voltage so as to control the energy storage module to stop working;
the energy storage module is also connected with the comparison control unit and used for storing energy under the control action of the first control module, providing comparison voltage to the comparison control unit and stopping working under the matching action of the first control module and the second control module.
3. The single fire switch device according to claim 2, wherein the first control module comprises a first triode, a first resistor and a second resistor, the second control module is a second triode, the energy storage module is a first capacitor, a base of the first triode is connected with one end of the first resistor, a collector of the first triode is respectively connected with the power taking control unit and one end of the second resistor, an emitter of the first triode is connected with one end of the first capacitor, the other end of the first resistor is respectively connected with the other end of the second resistor and a collector of the second triode, a base of the second triode is connected with the voltage stabilizing unit, and an emitter of the second triode is respectively connected with the other end of the first capacitor and a ground terminal.
4. The single fire switching device according to claim 3, wherein the start-up enhancing unit further comprises a protection module, the protection module is connected to the first transistor, the second transistor and the first capacitor, and is configured to control the first capacitor to stop storing energy after the stored energy reaches a preset energy when the first transistor is turned on.
5. The single fire switching device according to claim 4, wherein the protection module comprises a first voltage regulator tube and a third resistor, a negative electrode of the first voltage regulator tube is respectively connected with one end of the third resistor, one end of the first capacitor and an emitter of the first triode, and a positive electrode of the first voltage regulator tube is respectively connected with the other end of the third resistor and the other end of the first capacitor.
6. The single fire switching device according to any one of claims 1 to 5, wherein the comparison control unit includes a comparator, a third triode, a fourth resistor, a fifth resistor and a first diode, a positive phase input terminal of the comparator is connected to the power-taking control unit, a negative phase input terminal of the comparator is connected to the start-up enhancing unit, one end of the fourth resistor and one end of the fifth resistor respectively, an output terminal of the comparator is connected to the phase-cutting unit and the base of the third triode respectively, the other end of the fourth resistor is connected to the negative electrode of the first diode, the positive electrode of the first diode is connected to the voltage-stabilizing unit, the other end of the fifth resistor is connected to the collector of the third triode, and the emitter of the third triode is connected to the ground terminal.
7. The single fire switching device according to claim 6, wherein the power-taking control unit comprises a second voltage-regulator tube, a second capacitor and a sixth resistor, a negative electrode of the second voltage-regulator tube is connected with the rectifying unit and the start enhancing unit respectively, a positive electrode of the second voltage-regulator tube is connected with a positive-phase input end of the comparator, one end of the second capacitor and one end of the sixth resistor respectively, and the other end of the second capacitor is connected with the other end of the sixth resistor and a ground end respectively.
8. The single fire switching device according to claim 7, wherein the rectifying unit is a second diode, a negative electrode of the second diode is connected with a negative electrode of the second voltage regulator tube, and an anode of the second diode is connected with the phase cutting unit.
9. The single fire switching device according to claim 8 wherein said phase-cut element includes a MOS transistor and a third diode connected to said MOS transistor.
10. The pyrotechnic switching device of claim 9 wherein the energy storage element comprises at least one electrolytic capacitor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922230239.9U CN211580261U (en) | 2019-12-12 | 2019-12-12 | Single-fire switch device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922230239.9U CN211580261U (en) | 2019-12-12 | 2019-12-12 | Single-fire switch device |
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| CN211580261U true CN211580261U (en) | 2020-09-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113808886A (en) * | 2021-09-30 | 2021-12-17 | 天津华来科技股份有限公司 | Screen display wireless intelligent wall switch with time and environment information |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113808886A (en) * | 2021-09-30 | 2021-12-17 | 天津华来科技股份有限公司 | Screen display wireless intelligent wall switch with time and environment information |
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