CN208127862U - No-voltage opens switch, induction controller and the lamps and lanterns closed with zero current - Google Patents
No-voltage opens switch, induction controller and the lamps and lanterns closed with zero current Download PDFInfo
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- CN208127862U CN208127862U CN201721746081.5U CN201721746081U CN208127862U CN 208127862 U CN208127862 U CN 208127862U CN 201721746081 U CN201721746081 U CN 201721746081U CN 208127862 U CN208127862 U CN 208127862U
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Abstract
The utility model discloses a kind of no-voltages to open switch, induction controller and the lamps and lanterns closed with zero current, it is characterised in that controls and closes the switch when ac grid voltage is zero, completes the movement opened；When load current is zero, control switch is disconnected, and completes the movement closed.By effectively connecting switch in alternating current input voltage zero crossing, and load current zero crossing accurately disconnects switch, accomplish zero surge current when electrical load is opened, air circuit, and general all relays, the load of compatible all properties are powered off in zero load condition incision, to substantially increase the service life of relay, it reduces costs, while reducing the rush of current of electrical load unlatching, power supply grid and other electrical equipments will not be interfered and impacted.
Description
Technical field
The utility model relates to LED power technical field, in particular to a kind of no-voltage opens the switch closed with zero current, sense
Answer controller and lamps and lanterns.
Background technique
Surge is also surging, is just above the transient overvoltage of normal voltage, refer generally to the short time occurred in power grid as
High current caused by the high voltage of " wave " equally.In essence, surge is exactly one one of occurred on only million in the second
The violent pulse of kind.There are two the producing causes of surge voltage, and one is thunder and lightning, the other is large-scale load on power grid connect or
It is generated when disconnecting (switching including compensating electric capacity).
Conventional controller is in switch connection or the moment of disconnection, due to that there are inductance, will generate " wave in power grid in power grid
Gush voltage ", to cause surge current.It is general regardless of load is big when especially for using relay as switch execution unit
It is small, it is capacitive load, inductive load or capacitive load, in the moment ground contact of relay contact or disconnected, simply by the presence of
Voltage and current, can all generate great surge electricity electric current, electric current when this electric current is than product normal switch it is several times greater or even
Tens times, such high current can not only interfere with the other equipment of power grid, while can also greatly shorten the service life of relay；
Therefore the service life of relay determines that the service life of equipment guarantees that the entirety of equipment makes to alleviate the problem to a certain extent
With the service life, it has to using it is higher pressure resistance and more high current relay, and relay with pressure resistance and electric current raising,
Cost steeply rises, therefore also brings the problem of equipment cost rises.
Aiming at the problem that surge current, several solve or alleviate by inhibiting surge current method there is also following now
The problem, but can not fundamentally solve the problems, such as this.
1. serial temperature coefficient resistance (NTC), limit inrush currents when being powered on using negative temperature coefficient, after starting
NTC, which flows through current heating, makes the reduction of its resistance value.This method is simple, but self-heating, and the limitation of start-up characteristics difference is general
It is only applicable to 50W or less and in the occasion not high to the requirement of power supply.
2. electromagnetic relay formula, big current-limiting resistance of connecting on circuit, after power supply electrifying after certain time-delay electromagnetism after
The contact of electric appliance is by current-limiting resistance short circuit, the disadvantage is that volume is big, generate noise when being attracted, the relay contact service life is short, resistance to punching
It is poor to hit vibratility, and at high cost.
3. solid-state relay formula replaces mechanical contact with silicon-controlled, the disadvantage is that peripheral circuit is cumbersome, two-way controllable leakage
Therefore electric current is big cannot effectively to inhibit surge current.
Utility model content
For disadvantages described above, how the utility model aim reduces or avoids to generate surge current when facility switching to relay
The destruction of device contact promotes the service life of relay.
The switch closed with zero current is opened the utility model proposes a kind of no-voltage in order to solve problem above, feature exists
In increasing input voltage measurement module and load current detection module, input voltage measurement module and load current detection module
All it is connected with master controller, the input voltage measurement module samples AC-input voltage or input voltage zero-crossing timing point
Signal is simultaneously input to master controller, when the load current detection module samples loaded work piece electric current or loaded work piece current over-zero
Between the signal put and be input to master controller, when the moment control switch that AC-input voltage is zero is opened；When loaded work piece electricity
The moment control switch that stream is zero is closed, and is controlled and is closed the switch when input ac voltage is zero, the movement completed out；In load
Control switch disconnects when electric current is zero, completes the movement closed.
The no-voltage opens the switch closed with zero current, it is characterised in that load uses Alternating Current Power Supply, the execution of switch
Unit is relay, and the power supply module of the master controller uses half wave rectification mode, and the output of power supply module is straight
The ground wire in galvanic electricity source is floating ground, is connected with the pole zero curve N of AC-input voltage, and the load current detection module passes through one
It realizes and samples with the current sampling resistor of load in series, two A/D input ports of master controller are directly and current sampling resistor
Both ends be connected.
The no-voltage opens the switch closed with zero current, it is characterised in that also adds output voltage detection module；It is main
One A/D input port of controller is directly connected with the pole firewire L of input voltage after concatenating big resistance, realizes input voltage
Detection；One A/D input port of master controller is directly connected with the pole firewire L ' at load supplying end after concatenating big resistance, real
Existing output voltage detection.
A kind of induction controller, including microwave induced module and signal amplification circuit, the microwave induced module and signal
Amplifying circuit be connected, the signal amplification circuit is connected with master controller, it is described it is characterized in that use no-voltage open with
The switch that zero current closes, the no-voltage are opened in the switch closed with zero current and increase input voltage measurement module and load current
Detection module, input voltage measurement module and load current detection module are all connected with master controller, the input voltage inspection
It surveys the signal of module samples AC-input voltage or input voltage zero-crossing timing point and is input to master controller, the load current
The signal of detection module sampling loaded work piece electric current or loaded work piece time current crosses zero point is simultaneously input to master controller, works as exchange
The moment control switch that input voltage is zero is opened；When the moment control switch that loaded work piece electric current is zero is closed, in input friendship
Control closes the switch when galvanic electricity pressure is zero, the movement completed out；When load current is zero, control switch is disconnected, and completes to close dynamic
Make.
The induction controller, it is characterised in that the load uses Alternating Current Power Supply, and the execution unit of switch is relay
Device, the power supply module of the master controller use half wave rectification mode, and rectification circuit is connected using half-wave rectifying circuit, electricity
The ground wire of the output DC power supply of source power supply module is floating ground, is connected with the pole zero curve N of AC-input voltage, the load electricity
It flows detection module and sampling, two A/D input ports of master controller is realized by the current sampling resistor of one and load in series
Directly it is connected with the both ends of current sampling resistor.
The induction controller, it is characterised in that also add output voltage detection module；One A/D of master controller
Input port is directly connected with the pole firewire L of input voltage after concatenating big resistance, realizes input voltage measurement；Master controller
One A/D input port is directly connected with the pole firewire L ' at load supplying end after concatenating big resistance, realizes output voltage detection.
A kind of lamps and lanterns, the luminescence component including at least one Alternating Current Power Supply, it is characterised in that luminescence component by switch with
The load outputs mouth of control circuit is connected, and the execution unit of switch is relay, and the power supply module of master controller is adopted
Sample half wave rectification mode, rectification circuit are connected using half-wave rectifying circuit, the ground wire of the output DC power supply of power supply module
For floating ground, it is connected with the pole zero curve N of AC-input voltage, the load current detection module passes through one and load in series
Current sampling resistor realizes sampling, and two A/D input ports of master controller are directly connected with the both ends of current sampling resistor.
The lamps and lanterns, it is characterised in that the switch closed with zero current is opened using no-voltage, the no-voltage is opened and zero
Input voltage measurement module and load current detection module, input voltage measurement module and load are increased in the switch that electric current closes
Current detection module is all connected with master controller, the input voltage measurement module samples AC-input voltage or input voltage
The signal of zero-crossing timing point is simultaneously input to master controller, the load current detection module sampling loaded work piece electric current or load work
Make the signal of time current crosses zero point and be input to master controller, when the moment control switch that AC-input voltage is zero is opened；
When the moment control switch closing that loaded work piece electric current is zero, controls and close the switch when input ac voltage is zero, complete out
Movement；When load current is zero, control switch is disconnected, and completes the movement closed.
The lamps and lanterns, it is characterised in that also add output voltage detection module；One A/D of master controller is inputted
Port is directly connected with the pole firewire L of input voltage after concatenating big resistance, realizes input voltage measurement；One of master controller
A/D input port is directly connected with the pole firewire L ' at load supplying end after concatenating big resistance, realizes output voltage detection.
The lamps and lanterns, it is characterised in that including microwave induced module and signal amplification circuit, the microwave induced module
It is connected with signal amplification circuit, the signal amplification circuit is connected with master controller.
The utility model by alternating current input voltage zero crossing effectively connect switch and load current zero crossing it is accurate
Disconnection switch, accomplish zero surge current when electrical load is opened, power off air circuit in zero load condition incision, and general all
Relay, the load of compatible all properties reduces costs to substantially increase the service life of relay, while reducing electricity
The rush of current that gas load is opened, will not interfere and impact to power supply grid and other electrical equipments.
Detailed description of the invention
Fig. 1 is specific implementation circuit system block diagram；
Fig. 2 is the phase schematic diagram of different type load；
Fig. 3 is a kind of specific implementation circuit diagram.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
The utility model mainly passes through input voltage zero passage detection, output voltage zero passage detection and the inspection of load current zero passage
It surveys, in addition signal processing and execution, to really realize in zero load condition lower switch.
Fig. 1 is specific implementation circuit system block diagram, and alternating current AC input is high by the exchange of input through power supply module 1
Pressure is converted into 5V direct current and provides working power for each unit module, and input voltage measurement module 2 detects input ac voltage,
When input AC sine voltage is zero, master controller MCU5 is outputed signal to, is handled by MCU internal calculation, output one
It controls signal control output control circuit 6 and realizes that relay is attracted, to realize the purpose opened in input voltage zero passage.When after
The control signal that electric appliance receives unlatching executes closed procedure, and practical normal relay may be by contact time of contact
On the delayed contact of time delay T3 just actually contacts, so if being only simply directly to be controlled when detecting that input voltage is zero
Relay processed executes closed procedure, practical since there are contact time of contact time delay T3, the touchings of practical relay for relay
Input voltage can not just be zero when point contact, it is therefore desirable to be adjusted according to T3, since input voltage is AC signal, week
Phase is T, and each period, there are two points of zero voltage, therefore in order to which input voltage is just at the time of contact for the contact that guarantees relay
Zero, while the timeliness in order to guarantee response, master controller detect input ac voltage according to input voltage measurement module 2, when
It detects and executes closed procedure by the timing_delay estimation relay of T/2-T3 when input voltage is zero, such relay is in practical electricity
The preceding T3 reception of zero point is pressed through to the control signal of closure, is just the time of contact contact after the T3 time, and this
At the time of a time, also exactly input voltage was zero, really realize that no-voltage is opened.
Since the T3 of the relay of different brands has differences, if certainly existing part using the T3 of unified solid
Relay can not be realized really in the effect that no-voltage is opened, and still there is certain damage to relay in this way.In order to change
It is apt to the problem, also adds the self-learning function to T3, master controller triggers self-study when using for the first time or by other way
Function is practised, is opened by record control relay to the time difference being actually closed and obtains T3.It can specifically obtain in the following way
It takes：Time-delay relay is opened when passing through T/8 in input voltage zero passage, and records the moment as t1, while it is defeated to sample monitoring
Voltage out, it is t2, t2-t1=T3 that the moment is recorded when detecting that output voltage is zero, is achieved in that the control equipment is used
Relay T3, T3 is write in the nonvolatile memory of controller, next time use when directly adopt storage T3 correct
Control the time.The acquisition of T3 can also be calculated using multiple repairing weld, take multiple average value, and dynamic updates non-volatile deposit
T1 value in reservoir.The purpose and compatible same brand for accomplishing to be compatible with all different brands relays the case where there are discretenesses.
Output voltage detection module 3 detects output AC voltage, when exporting AC sine wave is zero, outputs signal to
MCU 5 is handled by MCU internal calculation, and one control signal control 6 of output disconnects to reach relay, to realize in output electricity
The purpose closed when pressing through zero has resistive, capacitive since load characteristic is different, perception, so when closing, voltage zero-cross
Method is the requirement that complete zero passage is not achieved and closes, and output voltage zero passage is effective when can only be for zero load.
Load current detection module 4 carries out load current detection, sample resistance 7 and load in series by sample resistance 7；Figure
2 be the phase schematic diagram of different type load, input voltage waveform A, electric current ideal waveform B, the advanced waveform C of electric current and current hysteresis
Waveform D afterwards：For resistive load, the current-responsive waveform of purely resistive load such as electric current ideal waveform B：Voltage zero-crossing detection circuit
It is detected jointly with current sampling detection circuit and completes zero passage detection, current over-zero detection is preferential；Capacitive load：Load current is advanced
Output voltage, current-responsive waveform such as electric current ideal waveform C, so can have phase difference, and when output voltage is zero, load electricity
Stream is not zero, so must output signal to MCU 5 when exporting AC sine wave electric current is zero and pass through at MCU internal calculation
Reason, one control signal control 6 of output disconnect to reach relay, the mesh closed when to realizing capacitive load load current zero passage
, inductive load：Load current lags output voltage, current-responsive waveform such as electric current ideal waveform D, so can have phase
Difference, when output voltage is zero, load current is not zero, it is necessary to when exporting AC sine wave electric current is zero, output signal to
MCU 5 is handled by MCU internal calculation, and one control signal control 6 of output disconnects to reach relay, to realize inductive load
The purpose closed when load current zero passage.
Relay from receive shutdown signal to practical contact disconnect exist a contact opening time delay T1, therefore actually after
Load current can not just be zero when the contact of electric appliance disconnects, it is therefore desirable to be adjusted according to T1, since load current is to hand over
It flows signal (sine wave), period T, each period, there are two current zeros, therefore in order to guarantee the contact of relay disconnected
Load current is just zero when opening, while the timeliness in order to guarantee response, and master controller is examined according to load current detection module 4
Output alternating current is surveyed, executes opening operation by the timing_delay estimation relay of T/2-T1 when detecting that load current is zero,
In this way relay actual current be zero preceding T1 reception to disconnect control signal, be just contact after the T1 time
The time of disconnection, and this time is also exactly load current at the time of be zero, really realizes that zero current is closed.
Since the T1 of the relay of different brands has differences, if certainly existing part using the T1 of unified solid
Relay can not be realized really in the effect that zero current is closed, and still there is certain damage to relay in this way.In order to change
It is apt to the problem, also adds the self-learning function to T1, master controller triggers self-study when using for the first time or by other way
Function is practised, T1 is obtained by the time difference of record control cut-off to actual switch-off.It can specifically obtain in the following way
It takes：Delays time to control cut-off when passing through T/8 when exporting current over-zero, and the moment is recorded as t3, while it is defeated to sample monitoring
Electric current out, when detecting that output electric current is zero, the record moment is t4, t4-t3=T1, is achieved in that the control equipment is used
Relay T1, T1 is write in the nonvolatile memory of controller, next time use when directly adopt storage T1 correct
The time is controlled, the acquisition of T1 can also be calculated using multiple repairing weld, take multiple average value, and dynamic updates non-volatile deposit
T1 value in reservoir, the purpose and compatible same brand for accomplishing to be compatible with all different brands relays the case where there are discretenesses.
When first powering on, there has been no electric currents to flow through for sample resistance 7, it is necessary to first detect input voltage zero passage, make relay
Conducting, so input voltage zero passage is necessary；In the case where output no-load or open circuit, sample resistance 7 is also without electric current
It flows through, so being to turn off relay by output voltage zero passage detection；As long as circuit in closed loop states, is all with load
It subject to current detecting, is combined by these three detection modes, it can be ensured that in the zero passage of any state.
Fig. 3 is a kind of specific implementation circuit diagram, alternating current AC input, through power supply module 8 by the ac high-voltage of input
It is converted into 5V direct current and provides working power for each unit module, when induction module 9 detects human mobile signal, signal is sent
Processing is amplified to signal amplification module 10, amplified signal is sent to 11 calculation process of MCU, and MCU 11 receives amplification letter
After number.Another important improvement of the utility model is the design using circuit.Load uses Alternating Current Power Supply, and switch is held
Row unit is relay, and the power supply module of master controller MCU samples half wave rectification mode, the output of power supply module 8
The ground wire of DC power supply is floating ground, is connected with the pole zero curve N of AC-input voltage, load current detection module by one with
The current sampling resistor R8 of load in series realizes sampling, and master controller MCU uses the single-chip microcontroller with multiple high-speed a/d mouths, MCU
Two A/D input ports be directly connected with the both ends of current sampling resistor, the voltage of current sampling resistor is respectively adopted, obtain
The pressure difference at current sampling resistor both ends, and then calculate and obtain loaded work piece electric current.Due to using halfwave rectifier, light current
Partial ground is directly ground with the N grade i.e. zero curve of Alternating Current Power Supply, reduces the insulation request of forceful electric power and weak current part, can be straight
Sampled input voltage, output voltage and load current are connect, circuit design is further simplified.
Master controller MCU controls the contact of relay by control triode Q3.When induction module 9 detects human motion letter
Number, need to control relay actuation, Q3 is connected by R11 to Q3 base stage in output high level, so that relay is attracted；Work as sense
Module is answered not detect human mobile signal, after output delay, amplification module 10 is exported without signal, 11 calculation process of MCU,
Current zero-crossing signal is detected simultaneously, after reaching zero passage condition, one low level of output ends Q3 by R11 to Q3 base stage, thus
Relay disconnects.
Input voltage zero passage detects input ac voltage, when input AC sine wave is zero, MCU 11 by R9, R10
It detects, MCU 11 exports a high level by R11 to Q3 base stage, and Q3 conducting, relay is reliably attracted, so that realization is inputting
The purpose opened when voltage zero-cross.
Output voltage zero passage detects output AC voltage, when input AC sine wave is zero, MCU by R12, R13
11 detect, MCU 11 exports a high level by R11 to Q3 base stage, and Q3 is connected, and relay is reliably attracted, may be implemented defeated
The purpose opened when voltage zero-cross out has resistive, capacitive since load characteristic is different, perception, so when closing, voltage mistake
Zero method is the requirement that complete zero passage is not achieved and closes, and voltage zero-cross is effective when can only be for zero load.
MCU 11 is equipped with switch self-learning module, and switch self-learning module realizes self-test relay contact time of contact
Time delay T3 and contact opening time delay T1, contact time of contact time delay are that relay receives closure control instruction to relay contact
Time in practical contact；Contact parting time time delay receives closure control instruction for relay and breaks to relay contact is practical
The time opened；The preceding T3 moment main controller controls relay switch closure for being zero in input voltage, the movement completed out；Negative
The preceding T1 moment main controller controls relay switch that charged current is zero disconnects, and completes the movement closed.Therefore work as induction module not
Human mobile signal is detected, after output delay, amplification module 10 is exported without signal, 11 calculation process of MCU, by simultaneously
The voltage at the both ends R8 is sampled, and calculates acquisition load current, when detecting load current is zero, that is, load current zero passage
Signal, using T/2-T1 when delay, MCU 11 exports a low level by R11 to Q3 base stage, Q3 is connected, thus relay
Device disconnects.
When induction module detects human mobile signal, the input voltage sampled by sampling R9 and R10, which is worked as, detects input
When voltage is zero, that is, input voltage zero cross signal, using T/2-T3 when delay, MCU 11 exports a low level and passes through
R11 to Q3 base stage, ends Q3, so that relay disconnects.
Above zero crossing detection method can be through such as Fig. 1, and the sample resistance in 3 realizes detection, can also pass through
Current transformer realizes detection, is also the scope of patent protection by way of realizing detection current transformer.
Above zero crossing detection method can be through such as Fig. 1, and the MCU in 3 realizes detection, can also pass through operation
Amplifier, comparator realize detection, and by operational amplifier, comparator is also the model of patent protection come the mode of realizing detection
Farmland.
Above disclosed is only a kind of embodiment of the utility model, cannot limit the right model of sheet with this certainly
It encloses, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and weighs according to the utility model
Benefit requires made equivalent variations, still falls within the range that the utility model is covered.
Claims (9)
1. no-voltage opens the switch closed with zero current, it is characterised in that increase input voltage measurement module and load current detection
Module, input voltage measurement module and load current detection module are all connected with master controller, the input voltage measurement mould
The signal of block Sample AC input voltage or input voltage zero-crossing timing point is simultaneously input to master controller, the load current detection
The signal of module samples loaded work piece electric current or loaded work piece time current crosses zero point is simultaneously input to master controller, when exchange inputs
The moment control switch that voltage is zero is opened；When the moment control switch that loaded work piece electric current is zero is closed, in input AC electricity
Control closes the switch when pressure is zero, the movement completed out；When load current is zero, control switch is disconnected, and completes the movement closed.
2. no-voltage according to claim 1 opens the switch closed with zero current, it is characterised in that load uses Alternating Current Power Supply,
The execution unit of switch is relay, and the power supply module of the master controller uses half wave rectification mode, power supply power supply mould
The ground wire of the output DC power supply of block is floating ground, is connected with the pole zero curve N of AC-input voltage, the load current detects mould
Block realizes sampling with the current sampling resistor of load in series by one, two A/D input ports of master controller directly with electricity
The both ends for flowing sampling resistor are connected.
3. no-voltage according to claim 2 opens the switch closed with zero current, it is characterised in that also add output voltage
Detection module；One A/D input port of master controller is directly connected with the pole firewire L of input voltage after concatenating big resistance,
Realize input voltage measurement；One A/D input port of master controller concatenates the firewire after big resistance directly with load supplying end
The pole L ' is connected, and realizes output voltage detection.
4. a kind of induction controller, including microwave induced module and signal amplification circuit, the microwave induced module is put with signal
Big circuit is connected, and the signal amplification circuit is connected with master controller, it is characterised in that opens using no-voltage and zero current
The switch of pass, the no-voltage, which is opened, increases input voltage measurement module and load current detection mould in the switch closed with zero current
Block, input voltage measurement module and load current detection module are all connected with master controller, the input voltage measurement module
The signal of Sample AC input voltage or input voltage zero-crossing timing point is simultaneously input to master controller, and the load current detects mould
The signal of block sampling loaded work piece electric current or loaded work piece time current crosses zero point is simultaneously input to master controller, when exchange input electricity
The moment control switch that pressure is zero is opened；When the moment control switch that loaded work piece electric current is zero is closed, in input ac voltage
Control closes the switch when being zero, the movement completed out；When load current is zero, control switch is disconnected, and completes the movement closed.
5. induction controller according to claim 4, it is characterised in that the load uses Alternating Current Power Supply, the execution of switch
Unit is relay, and the power supply module of the master controller uses half wave rectification mode, and rectification circuit uses halfwave rectifier
The ground wire of circuit connection, the output DC power supply of power supply module is floating ground, is extremely connected with the zero curve N of AC-input voltage
It connecing, the load current detection module is realized by the current sampling resistor of one and load in series and is sampled, the two of master controller
A A/D input port is directly connected with the both ends of current sampling resistor.
6. induction controller according to claim 4, it is characterised in that also add output voltage detection module；Main control
One A/D input port of device is directly connected with the pole firewire L of input voltage after concatenating big resistance, realizes input voltage inspection
It surveys；One A/D input port of master controller is directly connected with the pole firewire L ' at load supplying end after concatenating big resistance, realizes
Output voltage detection.
7. a kind of lamps and lanterns, the luminescence component including at least one Alternating Current Power Supply, it is characterised in that luminescence component passes through switch and control
The load outputs mouth of circuit processed is connected, and the execution unit of switch is relay, and the power supply module of master controller uses
Half wave rectification mode, rectification circuit are connected using half-wave rectifying circuit, and the ground wire of the output DC power supply of power supply module is
Floating ground, is connected with the pole zero curve N of AC-input voltage, and the switch closed with zero current, the no-voltage are opened using no-voltage
It opens in the switch closed with zero current and increases input voltage measurement module and load current detection module, load current detection module
It is realized and is sampled by the current sampling resistor of one and load in series, two A/D input ports of master controller are directly and electric current
The both ends of sampling resistor are connected；Input voltage measurement module and load current detection module are all connected with master controller, described
The signal of input voltage measurement module samples AC-input voltage or input voltage zero-crossing timing point is simultaneously input to master controller, institute
It states the signal of load current detection module sampling loaded work piece electric current or loaded work piece time current crosses zero point and is input to master control
Device processed, when the moment control switch that AC-input voltage is zero is opened；When the moment control switch that loaded work piece electric current is zero is closed
It closes, controls and close the switch when input ac voltage is zero, the movement completed out；When load current is zero, control switch is disconnected
It opens, completes the movement closed.
8. lamps and lanterns according to claim 7, it is characterised in that also add output voltage detection module；The one of master controller
A A/D input port is directly connected with the pole firewire L of input voltage after concatenating big resistance, realizes input voltage measurement；Master control
One A/D input port of device processed is directly connected with the pole firewire L ' at load supplying end after concatenating big resistance, realizes output electricity
Pressure detection.
9. according to lamps and lanterns described in claim 7 to 8 any one, it is characterised in that amplify including microwave induced module and signal
Circuit, the microwave induced module are connected with signal amplification circuit, and the signal amplification circuit is connected with master controller.
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| CN201721746081.5U CN208127862U (en) | 2017-12-14 | 2017-12-14 | No-voltage opens switch, induction controller and the lamps and lanterns closed with zero current |
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| CN201721746081.5U CN208127862U (en) | 2017-12-14 | 2017-12-14 | No-voltage opens switch, induction controller and the lamps and lanterns closed with zero current |
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|---|---|---|---|---|
| CN111505968A (en) * | 2019-01-15 | 2020-08-07 | 深圳市物联微电子有限公司 | Self-adaptive synchronous switch control system, method, equipment and storage medium |
| CN113472183A (en) * | 2020-03-30 | 2021-10-01 | 松下知识产权经营株式会社 | Switching device, switching power supply device, and vehicle |
| CN113472183B (en) * | 2020-03-30 | 2024-01-09 | 松下知识产权经营株式会社 | Switching device, switching power supply device, and vehicle |
| CN114326455A (en) * | 2021-09-10 | 2022-04-12 | 金华好哥信息技术有限公司 | Method and system for eliminating induced electricity of intelligent clothes airing machine |
| CN114552525A (en) * | 2022-04-22 | 2022-05-27 | 四川力士达照明设备股份有限公司 | Integrated protection circuit and method based on isolated zero-crossing switch |
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