CN2859778Y

CN2859778Y - Zero cross-over control system

Info

Publication number: CN2859778Y
Application number: CN 200520121226
Authority: CN
Inventors: 郭赐福
Original assignee: 郭赐福
Priority date: 2005-12-23
Filing date: 2005-12-23
Publication date: 2007-01-17

Abstract

The present utility relates to a zero-crossover control system which comprise phase sample circuit for connecting AC and detecting AC phase, relay for connecting AC to controlling AC output, control interface for inputting user order for switching on or off, control device which is connected with phase sample circuit, control interface for delaying control of relay switch-on or off according to switch-on or off order of control interface and information detected by phase sample circuit, driving circuit which is connected with control device for driving relay attracting. In the present utility, relay contact of zero-crossover control system may transitorily trip, when AC is zero-cross-over, which render the small potential between two ends of contact to prevent air ionization and arcing, reduce the destroy of drawn arc to contact. Relay contact is attracting when AC is in zero-cross-over, and can effectively reduce the surge current of zero-cross-over instant, reduce the damage due to metal contact overheat and reduce interference to electric appliance and electric network.

Description

Zero hands over control system more

Technical field

The utility model relates to, and is specifically related to a kind of zero and hands over control system more.

Background technology

Traditional relay is when adhesive, can there be spring (shake) phenomenon in its contact because of the mechanical structure reason, produce serious arcing (sparkover) because of too high voltage between the contact, can burn out the contact, cause the relay contact contact resistance to increase causing overheated and burn out, also even can produce the contact and be bonded together and flick and lost efficacy.Simultaneously also can be to the interference of power consumption equipment and electrical network thereof generation on every side.

The utility model content

The technical problems to be solved in the utility model is, at the above-mentioned defective of prior art, provides a kind of zero to hand over control system more.

The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of zero and hand over control system more, comprising links to each other with alternating current is used to detect the phase place Acquisition Circuit of alternating current phases, link to each other with alternating current and to be used to control the relay of described alternating current output, be used to import the control interface of subscriber switch order, with described phase place Acquisition Circuit, control interface links to each other and to detect the control device of phase information time-delay control relay folding according to the switch command of described control interface and described phase place Acquisition Circuit, and linking to each other with described control device is used to drive the drive circuit of described relay adhesive.

Get in the control system in zero friendship described in the utility model, described control device comprises the analog-digital commutator that is used to detect current alternating current voltage value, and described analog-digital commutator links to each other with the phase place Acquisition Circuit.

Get in the control system in zero friendship described in the utility model, described control device is included in and collects control interface and have switch command to calculate current phase place according to the magnitude of voltage and the known ac frequency of described analog-digital commutator, and, calculate the zero friendship calculation element of delaying time more according to described relay-operating time.

Get in the control system in zero friendship described in the utility model, described control device is included in and collects control interface when switch command is arranged, the zero friendship that provides at described calculation element zero of the control relay switch of delaying time is more handed over switching device shifter more, and described zero hands over more, and switching device shifter links to each other with described drive unit.

Get in the control system zero friendship the described in the utility model, described analog-digital commutator, calculation element realize that in single-chip microcomputer described zero friendship is got over switching device shifter and adopted the IO cause for gossip of described single-chip microcomputer existing.

The beneficial effects of the utility model are, because of the present utility model zero hands over the contact of the relay in the system more move some distances of the contact spring of short duration tripping of meeting when the alternating current zero passage, make that two ends, contact electrical potential difference is very little at this moment, be unlikely air ionization and puncture, reduce the destruction of arcing effectively the contact.Relay contact adhesive when the alternating current zero passage can effectively reduce the adhesive surge current of moment simultaneously, lowers hard contact and damages because of overheated, also can effectively reduce the interference to power consumption equipment and electrical network thereof generation on every side in addition.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:

Fig. 1 is the zero friendship of the present utility model theory diagram of a kind of execution mode of system more;

Fig. 2 is the zero friendship of the present utility model waveform schematic diagram of system's control relay time-delay folding more;

Fig. 3 is the zero friendship of the present utility model circuit diagram of system more.

Embodiment

As shown in Figure 1, hand over the structured flowchart of a kind of execution mode of system more for of the present utility model zero.Zero in this example friendship control system more comprises phase place Acquisition Circuit, relay, control interface, control device.Wherein control device is a single-chip microcomputer, wherein Acquisition Circuit links to each other with alternating current and is used to detect alternating current phases, relay links to each other with alternating current and is used to control alternating current output, control interface is used to import the subscriber switch order, and control device links to each other with phase place Acquisition Circuit, control interface and is used for detecting the folding of phase information time-delay control relay according to the switch command of control interface and phase place Acquisition Circuit.Also comprising links to each other with single-chip microcomputer is used to drive the drive circuit of relay adhesive, is used to single-chip microcomputer that the power circuit of power supply is provided.

Single-chip microcomputer comprises analog-digital commutator, calculation element, zero friendship switching device shifter more in this example.Wherein analog-digital commutator is used to detect current alternating current voltage value, and analog-digital commutator links to each other with the phase place Acquisition Circuit.Calculation element has switch command to calculate current phase place according to the magnitude of voltage and the known ac frequency of analog-digital commutator collecting control interface, and according to relay-operating time, calculates zero and hand over time-delay more.Zero hands over more switching device shifter collecting control interface when switch command is arranged, zero friendship that provides at the calculation element control relay switch of delaying time more, and zero hands over and gets over switching device shifter and link to each other with drive unit.Analog-digital commutator, calculation element realize that in single-chip microcomputer zero hands over more, and switching device shifter adopts the IO cause for gossip of single-chip microcomputer existing.

Fig. 2 is the zero friendship of the present utility model schematic diagram of system's control relay time-delay folding more.Suppose that the ac frequency that uses is 50Hz, its half period $\frac{T}{2} = 10 ms .$ Be 6ms the operate time of relay adhesive.Like this when relay is prepared adhesive, the signal of phase circuit input is more handed in single-chip microcomputer detecting earlier zero, and be starting point with A, postpone 4ms (10ms-6ms) again to the B point, give relay coil energization then, because relay adhesive operate time is 6ms, thus when next zero-crossing of alternating current the C point, just in time relay contact adhesive.

Be illustrated in figure 3 as of the present utility model zero and hand over the circuit diagram of system more.Wherein R2 is an Acquisition Circuit, and Q1 is used to drive the relay adhesive, and diode D1-D4 is a rectification circuit, and U2 is a single-chip microcomputer, and U1 provides power supply for linear voltage-stabilizing circuit is used to single-chip microcomputer, and RELAY is a relay, and R2 is used for the phase place collection.

Of the present utility model zero hands over the actual infrared inductor that can be used for of control system more; light-controller; timer and wireless control switch or the like; these devices all use relay to be used as the control of switch; and the load that is connect mostly is benefit tasting property fluorescent lamp or discharge lamp or motor etc. greatly; these moments that load on switch can produce great burst current; easily the contact of relay is damaged even fusion; hand over the application of control system more by zero; make burst current reduce to minimum even do not have; and then the access times of protection and prolongation relay contact, allow product use safety and reliability.

Claims

1, a kind of zero hands over control system more, it is characterized in that, comprising links to each other with alternating current is used to detect the phase place Acquisition Circuit of alternating current phases, link to each other with alternating current and to be used to control the relay of described alternating current output, be used to import the control interface of subscriber switch order, linking to each other with described phase place Acquisition Circuit, control interface detects the control device of phase information time-delay control relay folding according to the switch command of described control interface and described phase place Acquisition Circuit, linking to each other with described control device is used to drive the drive circuit of described relay adhesive.

2, according to claim 1 zero hand over control system more, it is characterized in that described control device comprises the analog-digital commutator that is used to detect current alternating current voltage value, described analog-digital commutator links to each other with the phase place Acquisition Circuit.

3, according to claim 1 zero hand over control system more, it is characterized in that, described control device is included in and collects control interface and have switch command to calculate current phase place according to the magnitude of voltage and the known ac frequency of described analog-digital commutator, and, calculate the zero friendship calculation element of delaying time more according to described relay-operating time.

4, according to any one described zero control system more of handing in the claim 2～3, it is characterized in that described analog-digital commutator, calculation element realize that in single-chip microcomputer described zero friendship is got over switching device shifter and adopted the IO cause for gossip of described single-chip microcomputer existing.