CN201830223U - Active and passive combined power switch - Google Patents
Active and passive combined power switch Download PDFInfo
- Publication number
- CN201830223U CN201830223U CN2010205818659U CN201020581865U CN201830223U CN 201830223 U CN201830223 U CN 201830223U CN 2010205818659 U CN2010205818659 U CN 2010205818659U CN 201020581865 U CN201020581865 U CN 201020581865U CN 201830223 U CN201830223 U CN 201830223U
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- power switch
- contact power
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- active
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Abstract
The utility model discloses an active and passive combined power switch which is characterized by comprising an active contact power switch part, a passive contact power switch part and a logic controller. The active contact power switch part consists of a zero-crossing detection circuit, a photoelectric coupling trigger circuit and a bidirectional thyristor; the passive contact power switch part consists of an electromagnetic relay and a relay driving circuit; the bidirectional thyristor and the electromagnetic relay are connected between a mains supply and a load in parallel; the zero-crossing detection circuit and the relay driving circuit are connected with a control signal output end of the logic controller; the logic controller outputs control signals respectively to the active contact power switch part and the passive contact power switch part; an active contact power switch circuit completes the functions under the transient-state condition when a contact supplying power to the load is closed; and a passive contact power switch circuit completes the functions under the condition that the load is supplied with power in a steady state. The active contact power switch part and the passive contact power switch part are complementary for each other, so that the adaptability of the load is improved, the service life is prolonged and the requirements of the heat radiation on the whole structure and the mounting environment are eliminated.
Description
Technical field
The utility model relates to a kind of power switch, specifically be a kind of can be in the airtight waterproof small space, do not possess under the radiating condition having perception, capacitive, resistive and have the power switch of using in the switch on-off device of high and medium power load of this three specific character respectively at different time.
Background technology
At present along with widely-used to the fast development of intellectuality, high frequencyization, high-power direction and switch power technology of household electrical appliance, industrial automation equipment and transformation of electrical energy equipment, in the time need carrying out switch on-off control to the complete machine load that present these equipment is constituted, because the load characteristic of controlled device changed in running time, the switch control point of high and medium power load has been proposed than the higher requirement of switch on-off control of conventional load (as pure resistive load, resistance sense load) in the past.
The switch on-off control mode of at present traditional high and medium power load has two kinds substantially, a kind of is the mechanical contact-type control mode that is made of electromagnetic relay or A.C. contactor, and another kind is by semiconductor bidirectional triode thyristor or the non-contact type control mode that is made of its extended solid-state relay.Two kinds of control modes all have a large amount of uses in present electronic product complete machine.But along with the lifting and the current industrial of load electrical characteristic complexity are controlled the machine requirement of the particularly open-air water proof type machine product of machine product to miniaturization, low-cost waterproof sealing ABS casing.These two kinds traditional power switch modes show gradually to defectives such as the limitation of adaptive load and unreliabilities.
Load switch mode for mechanical contact-types such as picture electromagnetic relay or A.C. contactors, because its off-state has high insulation resistance and its on-state has the characteristic of low on-resistance, make it compare semiconductor bipolar or the unipolarity power electronic device has unique electric and physical characteristic.But there is the problem of the following aspects in the mechanical contact-type power switch.
The first, because there is the inertia of control end excitation in electromagnetic relay, make switch contact be difficult to guarantee synchronous conducting and shutoff with respect to the electrical characteristic of load.
The second, variation of temperature seriously influences the performance existence of electromagnetic relay.The too high formation that aggravates the contact surface film resistance of temperature descends the contact switching capability; Temperature is crossed to hang down and can be made its contact cold bonding effect aggravation, and the contact surface frosting plays dew, and the armature surface produces cold and detached adhesion, makes relay uncontrollable.
The 3rd, when controlled load is pure resistive or resistance sense, can occurs big electric current when cutting off the high and medium power load and puncture air and cause arcing to make the oxidation gradually of mechanical contact local overheating thereby exist, reduced specified switch number of times and made its premature failure.When controlled load was capacitance-resistance, the closed moment existence of mechanical contact produced electric spark to the surge current of capacitive load, punctured the contact surface diaphragm and caused the adhesion of local overheating contact thereby make mechanical contact produce corrosion in moment, and complete machine control is out of control.
Load switch mode for no mechanical contacts such as picture bidirectional triode thyristor or solid-state relays, because this class device is the semiconductor bipolar power electronic device, can make break-over of device by the mode that adds trigger current at the control utmost point, and can further be controlled at load voltage zero crossing annex and add trigger current and make its conducting at the control utmost point, and lose under the condition of trigger current device at current zero-crossing point from turn-offing the off-state state that returns to.But there is the on-state voltage drop (about about 1 volt) that is produced by the semiconductor device self-characteristic in bidirectional triode thyristor under the on-state state, the caused on-state loss of this on-state voltage drop raises device temperature, cause the bidirectional triode thyristor rated value under hot conditions, to descend greatly, Device Commutation reduces greatly from turn-offing reliability, require the device derate scope of application to enlarge, device area of dissipation and radiating rate improve and the adaptations of the complete machine structure that caused thus.The utmost point of bidirectional triode thyristor control simultaneously trigger current also causes the voltage that controlled device is applied to have certain high order harmonic component with respect to the relative time that the line voltage zero crossing applies the conducting trigger angle, can produce potential safety hazard to the reliability service of controlled device.
The utility model content
The purpose of this utility model is to provide a kind of active passive combined power switch, can solve in the airtight waterproof small space, not possess under the radiating condition having perception, capacitive, the resistive and switch on-off that has the high and medium power load of this three specific character at different time respectively, safe and reliable, the reliability of complete machine and workload-adaptability are had increased significantly.
For addressing the above problem, the utility model by the following technical solutions: this active passive combined power switch comprises active contactless power switch sections, passive contact power switch part, logic controller; Described active contactless power switch sections is made of zero cross detection circuit, photoelectricity emitter coupled logic circuit and bidirectional triode thyristor; Described passive contact power switch part is made up of electromagnetic relay, relay drive circuit; Described bidirectional triode thyristor, electromagnetic relay are parallel between civil power, the load; Described zero cross detection circuit, relay drive circuit are connected with the control signal output ends of described logic controller respectively, and logic controller is respectively exported the sequential of one group of control signal and two groups of signals of cooperation to active contactless power switch sections, passive contact power switch part.
As further technical scheme of the present utility model:
In this active passive combined power switch, also comprise a contact protection circuit, be connected with the contact and the described bidirectional triode thyristor of described electromagnetic relay.
This active passive combined power switch is by active, the passive contact of combination power switch circuit on circuit, make active contactless power switch sections and passive contact power switch part under the signal controlling of logic controller, successively be switched on or switched off two-part contact in phase mutually, finish the contact switch function of being finished by single power switch form under the conventional situation.Finish function under the transient state situation when closing of contact of electric and contact disconnected by active contactless power switching circuit portion, thereby can improve under the transient state situation adaptability capacitive or inductive load; Partly finish the function under the electric stable situation simultaneously, thereby can eliminate by the power dissipation problems and the problem such as supply power voltage wave distortion of active power switch under stable situation by passive contact power switch circuit.
The beneficial effects of the utility model are: active contactless power switch sections wherein, passive contact power switch part complement one another on function, improved the bringing onto load adaptive capacity of integrated circuit, prolonged the useful life of mechanical contact, and eliminated by device heat dissipation problem band to complete machine structure design and whole machine installation environment requirement.This power switch circuit can be in the airtight waterproof small space, do not possess under the radiating condition have perception, capacitive, resistive and use in different time has the switch on-off device of high and medium power load of this three specific character respectively.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described further:
Fig. 1 is the schematic block circuit diagram of the utility model embodiment.
Embodiment
As shown in Figure 1, this active passive combined power switch comprises active contactless power switch sections, passive contact power switch part, logic controller, contact protection circuit.
Active contactless power switch sections is made of zero cross detection circuit, photoelectricity emitter coupled logic circuit and bidirectional triode thyristor, is the zero passage of the routine bidirectional triode thyristor power switch circuit that sets out.
Passive contact power switch part is made up of electromagnetic relay, relay drive circuit.
The electromagnetic relay of the bidirectional triode thyristor of active contactless power switch sections, passive contact power switch part is parallel between civil power, the load.The relay drive circuit of the zero cross detection circuit of active contactless power switch sections, passive contact power switch part is connected with the control signal output ends of described logic controller respectively.
Logic controller is respectively exported the sequential of one group of control signal and two groups of signals of cooperation to active contactless power switch sections, passive contact power switch part.Make active contactless power switch sections and passive contact power switch part under the signal controlling of logic controller, successively be switched on or switched off two-part contact mutually in phase.Finish function under the transient state situation when closing of contact of electric and contact disconnected by active contactless power switching circuit portion.Partly finish the function under the electric stable situation by passive contact power switch circuit.
Active contactless power switch sections can be under the triggering signal that logic controller produces, utilize the precise time of bidirectional triode thyristor to trigger function, near make contact voltage over zero between the contact, can satisfy the surge current that capacitive load is produced like this when make contact, to eliminate the generation of electric spark, effectively protect the contact; The change of current that utilizes bidirectional triode thyristor disconnects the contact during at current zero-crossing point from turn-off function.The contact protection circuit of this active passive combined power switch is connected with the contact of described electromagnetic relay and described bidirectional triode thyristor.Suitably adjust the parameter value of device in the contact protection circuit according to load characteristic; can reduce the current changing rate of the bidirectional triode thyristor change of current when turn-offing (when cutting off load and the current changing rate the when electromagnetic relay and the bidirectional triode thyristor change of current); thereby reduce the Kickback voltage that inductive load produced; to eliminate the generation of electric arc, effectively protect the contact.Thereby can improve under the transient state situation adaptability to capacitive or inductive load.
Passive contact power switch part is controlled through the amplification realization excitation of relay drive circuit in the control signal that logic controller produced, thereby is opened and closed mechanical contact.Electromagnetic relay extremely low contact resistance when on-state, can avoid the requirement of bidirectional triode thyristor by the aspects such as device heating, radiator installation, waterproof sealing and machine volume structure that on-state voltage drop produced, voltage waveform distortion and the voltage harmonic that can avoid again being caused by the relative zero crossing trigger delay of bidirectional triode thyristor produce the influence that payload security is moved.
Active contactless power switch sections, passive contact power switch part complements one another on function, has reached useful life of improving whole bringing onto load adaptive capacity, prolonged mechanical contact, and the purpose to complete machine structure design and whole machine installation environment requirement eliminated by device heat dissipation problem band.
Claims (2)
1. an active passive combined power switch is characterized in that, comprises active contactless power switch sections, passive contact power switch part, logic controller; Described active contactless power switch sections is made of zero cross detection circuit, photoelectricity emitter coupled logic circuit and bidirectional triode thyristor; Described passive contact power switch part is made up of electromagnetic relay, relay drive circuit; Described bidirectional triode thyristor, electromagnetic relay are parallel between civil power, the load; Described zero cross detection circuit, relay drive circuit are connected with the control signal output ends of described logic controller respectively, and logic controller is respectively exported the sequential of one group of control signal and two groups of signals of cooperation to active contactless power switch sections, passive contact power switch part.
2. a kind of active passive combined power switch according to claim 1 is characterized in that: also comprise a contact protection circuit, be connected with the contact and the described bidirectional triode thyristor of described electromagnetic relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205818659U CN201830223U (en) | 2010-10-29 | 2010-10-29 | Active and passive combined power switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205818659U CN201830223U (en) | 2010-10-29 | 2010-10-29 | Active and passive combined power switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201830223U true CN201830223U (en) | 2011-05-11 |
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ID=43968736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205818659U Expired - Lifetime CN201830223U (en) | 2010-10-29 | 2010-10-29 | Active and passive combined power switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201830223U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356878A (en) * | 2016-10-18 | 2017-01-25 | 泰豪科技股份有限公司 | Inter-phase load transfer method based on waveform fitting |
| CN106451500A (en) * | 2016-10-18 | 2017-02-22 | 泰豪科技股份有限公司 | Inter-phase load transfer terminal device based on transient waveform fitting |
| WO2018090972A1 (en) * | 2016-11-17 | 2018-05-24 | 深圳市欧瑞博科技有限公司 | Contact protection circuit of relay and power supply control device containing contact protection circuit |
| CN116382385A (en) * | 2023-04-03 | 2023-07-04 | 无锡市稳先微电子有限公司 | Temperature control method, temperature control circuit, intelligent electronic switch and automobile |
-
2010
- 2010-10-29 CN CN2010205818659U patent/CN201830223U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356878A (en) * | 2016-10-18 | 2017-01-25 | 泰豪科技股份有限公司 | Inter-phase load transfer method based on waveform fitting |
| CN106451500A (en) * | 2016-10-18 | 2017-02-22 | 泰豪科技股份有限公司 | Inter-phase load transfer terminal device based on transient waveform fitting |
| CN106451500B (en) * | 2016-10-18 | 2019-12-27 | 泰豪科技股份有限公司 | Interphase load transfer terminal device based on transient waveform fitting |
| WO2018090972A1 (en) * | 2016-11-17 | 2018-05-24 | 深圳市欧瑞博科技有限公司 | Contact protection circuit of relay and power supply control device containing contact protection circuit |
| CN116382385A (en) * | 2023-04-03 | 2023-07-04 | 无锡市稳先微电子有限公司 | Temperature control method, temperature control circuit, intelligent electronic switch and automobile |
| CN116382385B (en) * | 2023-04-03 | 2024-03-05 | 无锡市稳先微电子有限公司 | Temperature control method, temperature control circuit, intelligent electronic switch and automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: Xinluo Avenue high tech Zone of Ji'nan City, Shandong province 250101 silver bearing No. 2008 building 4-901 Patentee after: TelChina (Shandong) Corporation Limited Address before: 250101 Shandong city of Ji'nan province high tech Zone Shun Road No. 1, Qilu Software Park Venture Plaza A1 block 3 layer Patentee before: TelChina (Shandong) Corporation Limited |
|
| C56 | Change in the name or address of the patentee |
Owner name: TAIHUA INTELLIGENCE INDUSTRY GROUP CO., LTD. Free format text: FORMER NAME: TELCHINA (SHANDONG) CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Xinluo Avenue high tech Zone of Ji'nan City, Shandong province 250101 silver bearing No. 2008 building 4-901 Patentee after: TAIHUA WISDOM INDUSTRY GROUP CO., LTD. Address before: Xinluo Avenue high tech Zone of Ji'nan City, Shandong province 250101 silver bearing No. 2008 building 4-901 Patentee before: TelChina (Shandong) Corporation Limited |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110511 |