CN202602603U - Alternating current solid relay - Google Patents
Alternating current solid relay Download PDFInfo
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- CN202602603U CN202602603U CN 201220185883 CN201220185883U CN202602603U CN 202602603 U CN202602603 U CN 202602603U CN 201220185883 CN201220185883 CN 201220185883 CN 201220185883 U CN201220185883 U CN 201220185883U CN 202602603 U CN202602603 U CN 202602603U
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Abstract
The utility model discloses an alternating current solid relay which comprises a casing encapsulation, a power switch control circuit and a power switch circuit, wherein the power switch control circuit and the power switch circuit are installed in the casing encapsulation. The power switch control circuit comprises a direct current-direct current (DC-DC) power circuit, a photoelectric conversion circuit, a short circuit signal collection circuit, a signal locking circuit, a current zero-crossing acquisition circuit, a voltage zero-crossing acquisition circuit, a voltage zero-crossing acquisition circuit, a control logic circuit, a first driving circuit and a second driving circuit. The power switch circuit comprises a first current sampling resistor, a second current sampling resistor, a first metal-oxide-semiconductor field-effect transistor with a grid connected with an output end of the first driving circuit and a second metal-oxide-semiconductor field-effect transistor with a grid connected with an output end of the second driving circuit. The alternating current solid relay has the advantages of low conduction pressure drop, small leakage current and functions of connection when voltage passes zero, disconnection when current passes zero and short circuit overcurrent protection.
Description
Technical field
The utility model relates to a kind of relay, is specifically related to a kind of ac solid relay, is used for field switch controls such as aircraft, naval vessel, vehicle and industrial automation.
Background technology
Compare traditional electrical magnetic coil contact-carrying relay, solid-state relay have the life-span long, reliability is high, power controlling is little, switching speed is fast, advantages such as electromagnetic interference is little, noiseless, no-spark.Mostly its electronic switching device of present ac solid relay is bidirectional triode thyristor, adopt the ac solid relay conducting that controllable silicon realizes after tube voltage drop bigger, oneself power consumption is bigger, it is bigger to close the leakage current of having no progeny, the electricity that can not realize ideal is isolated.And at present the power switch pipe ac solid relay that adopts the high-power MOSFET device to realize is non-zero-based ac solid relay, has only realized the on-off function of alternating current, and the zero passage that can not realize voltage is opened and the zero-crossing switching function of electric current.
For example; One Chinese patent application number is 201120014085.0, open day be that the application case that August 17, patent name in 2011 are " a kind of ac solid relays " discloses a kind of ac solid relay; This relay adopts bidirectional thyristor as switching tube, photoelectrical coupler control bidirectional thyristor circuits for triggering.Its deficiency is that bidirectional thyristor switching circuit conduction voltage drop is big, and oneself power consumption is high, and leakage current is big, can not realize the short circuit current protection.
And for example; One Chinese patent application number for 200820115691.X, open day be that the application case that October 21, patent name in 2009 are " AC/DC overcurrent protection solid-state relays " discloses a kind of AC/DC overcurrent protection solid-state relay; This relay adopts MOSFET as switching power tube; Realize the overcurrent short-circuit protection, have alternating current-direct current two-way admittance function.Its weak point is, the bridge full wave rectifier that it adopts diode to constitute, and conduction voltage drop is big, and power consumption is high.Another deficiency is, its adopts extra external power source to give circuit supply, increases the external pin of solid-state relay, and is higher to outside application requirements, do not possess that the AC power zero passage is opened and the zero passage closing function.
And for example; One Chinese patent application number is 95241534.8, open day be that the application case that June 5, patent name in 1996 are " photovoltaic type solid-state relays " discloses a kind of alternating current-direct current solid-state relay; This relay switch loop is made up of two power field effect pipe MOSFET; Do not need additional supply, can be as ac power switch.Its weak point is do not possess AC power power supply zero passage and open and the zero passage closing function.
The utility model content
To the deficiency that prior art exists, the utility model purpose provides a kind ofly has that low conduction voltage drop, leakage current are little, voltage zero-cross is opened the ac solid relay that the short circuit overcurrent defencive function was closed and had to current over-zero.
To achieve these goals, the utility model is to realize through following technical scheme:
The utility model comprises the housing encapsulation and is installed in power switch control circuit and the power switch circuit in the housing encapsulation; Power switch control circuit comprises input termination control power input VCC; The DC-DC power circuit of GND; The photoelectric switching circuit of input termination control power input VCC; The short-circuit signal Acquisition Circuit; The signal latch circuit that is connected with short-circuit signal Acquisition Circuit output; The current over-zero Acquisition Circuit; The voltage zero-cross Acquisition Circuit; The control logic circuit that is connected with current over-zero Acquisition Circuit and voltage zero-cross Acquisition Circuit output; First drive circuit that is connected with control logic circuit and photoelectric switching circuit output; Second drive circuit that is connected with the control logic circuit and the first drive circuit output.
Above-mentioned power switch circuit comprises second power field effect pipe that first power field effect pipe that first current sampling resistor and second current sampling resistor that is connected with first current sampling resistor, one end and grid connect the first drive circuit output and grid connect the second drive circuit output.
The common port of above-mentioned first current sampling resistor and second current sampling resistor is the output ground of DC-DC power circuit, and the other end of first current sampling resistor and second current sampling resistor all is connected with short-circuit signal Acquisition Circuit and current over-zero Acquisition Circuit input; The source electrode of first power field effect pipe connects the common port of first current sampling resistor and short-circuit signal Acquisition Circuit, and the drain electrode of first power field effect pipe is one of them output of switch of ac solid relay; The source electrode of second power field effect pipe connects the common port of second current sampling resistor and short-circuit signal Acquisition Circuit, and the drain electrode of second power field effect pipe is the switch another one output of ac solid relay; Two outputs of signal latch circuit connect the grid of first power field effect pipe and the grid of second power field effect pipe respectively; Output L, the N of two input termination solid-state relays of voltage zero-cross Acquisition Circuit.
The utility model also comprises first grid resistance and second grid resistance; First grid resistance is connected between the common port of common port and the signal latch circuit and the first power field effect tube grid of first drive circuit and second drive circuit; Second grid resistance is connected between the common port of output and the signal latch circuit and the second power field effect tube grid of second drive circuit.
Above-mentioned housing encapsulation comprises housing and the embedding casting glue in housing.
The beneficial effect of the utility model is following:
(1) the utility model ac solid relay has adopted advanced MOSFET isolated controlling technology, and after input added that dc control signal arrives certain current value, output just can be transformed into on-state from off-state, and only 17mV/A falls in conducting voltage;
(2) the utility model ac solid relay has that voltage zero-cross is opened and current over-zero turn-off function, short circuit self-lock protection function;
(3) the power field effect pipe circuit of the utility model ac solid relay, the off-state leakage current is lower than 5 microamperes;
(4) the utility model ac solid relay input control voltage can be compatible preferably with integrated circuits such as TTL, CMOS.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model;
Fig. 2 is the circuit theory diagrams of the utility model.
Each label among the figure: housing encapsulation 1, power switch control circuit 2, power switch circuit 3, DC-DC power circuit 21; Photoelectric switching circuit 22, control logic circuit 23, the first drive circuits 24, the second drive circuits 25; Voltage zero-cross Acquisition Circuit 26, short-circuit signal Acquisition Circuit 27, signal latch circuit 28, current over-zero Acquisition Circuit 29; First grid resistance 31, second grid resistance 32, the first power field effect pipes 33; Second power field effect pipe, 34, the first current sampling resistors, 35, the second current sampling resistors 36.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand understanding with effect, below in conjunction with embodiment, further set forth the utility model.
Referring to Fig. 1, the utility model comprises housing encapsulation 1, be installed in power switch control circuit 2 and switch three output L, N and LOAD of power switch circuit 3, control power input VCC, GND and ac solid relay in the housing encapsulation 1.Wherein, housing encapsulation 1 comprises housing and the embedding casting glue in housing.
Referring to Fig. 2, power switch control circuit 2 comprises DC-DC power circuit 21, opto-electronic conversion electrical equipment 22, control logic circuit 23, first drive circuit 24, second drive circuit 25, voltage zero-cross Acquisition Circuit 26, short-circuit signal Acquisition Circuit 27, signal latch circuit 28 and current over-zero Acquisition Circuit 29.
Power switch circuit comprises first grid resistance 31, second grid resistance 32, first power field effect pipe 33, second power field effect pipe 34, first current sampling resistor 35 and the second current acquisition resistance 36.
The input termination control power supply input VCC of photoelectric switching circuit 22, output termination first drive circuit 24 input D; DC-DC power circuit 21 input termination control power supply input VCC, GND, output output+9V insulating power supply; The first input end of short-circuit signal Acquisition Circuit 27 connects the E end of first current sampling resistor 35, the F end of the second input termination, second current sampling resistor 36, the input of output termination signal latch circuit 28; The output of the input termination short-circuit signal Acquisition Circuit 27 of signal latch circuit 28, the grid of the first output termination, first FET 33 of signal latch circuit 28, the grid of the second output termination, second FET 34 of signal latch circuit 28; The first input end of current over-zero Acquisition Circuit 29 connects the E end of first current sampling resistor 35, the F end of the second input termination, second current sampling resistor 36, and output I+, I-connect two inputs of control logic circuit 23 respectively; Two inputs of voltage zero-cross Acquisition Circuit 26 meet output L, the N of solid-state relay respectively, and output V+, V-connect two inputs of control logic circuit 23 respectively; Four inputs of control logic circuit 23 meet V+, the V-of I+, I-and the voltage zero-cross Acquisition Circuit 26 of current over-zero Acquisition Circuit 29 respectively; The C end of the first output termination, first drive circuit 24 of control logic circuit 23, the C end of control logic circuit 23 second output terminations second drive circuit 25; The input C of first drive circuit 24 connects first output of control logic circuit 23, and input D connects the output of photoelectric switching circuit 22, and the output terminals A of first drive circuit 24 connects an end of first grid resistance 31 and the D end of second drive circuit 25; The input C of second drive circuit 25 connects second output of control logic circuit 23, and input D connects the output terminals A of first drive circuit 24, and output B connects an end of second grid resistance 32; The output terminals A of first grid resistance 31 1 terminations first drive circuit 24, the grid of another termination first power field effect pipe 33; The output B of second grid resistance 32 1 terminations second drive circuit 25, another termination second power field effect pipe 34 grids; The grid of first power field effect pipe 33 connects an end of first grid resistance, drains to be that the load output LOAD of solid-state relay, source electrode connect the E end of first current sampling resistor 35; The grid of second power field effect pipe 34 connects an end of second grid resistance, drains to be that the output L of solid-state relay, source electrode connect the F end of second current sampling resistor 35; The source electrode of one termination, first power field effect pipe 33 of first current sampling resistor 35, an end of another termination second current sampling resistor 36; The source electrode of one termination, second power field effect pipe 34 of second current sampling resistor 36, an end of another termination first current sampling resistor 35.
The course of work of the utility model is following:
Wherein, Photoelectric switching circuit 22 is made up of photoelectric coupled device, resistance, electric capacity, is used for detecting the control voltage input signal, according to the amount of logic that the no-output high-low level is arranged of the control input signals D end to first drive circuit 24; If detected the control voltage input signal; Photoelectric switching circuit 22 output high level then, otherwise, output low level then.
DC-DC power circuit 21 provides for all control circuits+and 9V isolates power supply, and insulating power supply ground is the common port of first current sampling resistor 35 and second current sampling resistor 36.
The short circuit overcurrent signal that short-circuit signal Acquisition Circuit 27 is gathered on first current sampling resistor 35 or second current sampling resistor 36; When short circuit; The overcurrent that flows through on first current sampling resistor 35 or second current sampling resistor 36 makes first current sampling resistor 35 or second current sampling resistor, 36 two ends produce voltage greater than the normal voltage that is provided with; Then short-circuit signal Acquisition Circuit 27 is exported high level signals; Otherwise, during no overcurrent, short-circuit signal Acquisition Circuit 27 output low level signals.
Signal latch circuit 28 judges whether short circuit according to the level signal of short-circuit signal Acquisition Circuit 27 outputs; The short-circuit signal of short-circuit signal Acquisition Circuit 27 outputs is latched, output to the grid of first power field effect pipe 33 and the grid of second power field effect pipe 34 respectively.
Voltage zero-cross Acquisition Circuit 26 is according to the zero passage situation difference output voltage zero cross signal of AC supply voltage; If L end with respect to the N end for just; This moment when alternating voltage is near zero point, voltage zero-cross Acquisition Circuit 26 output V+ output low levels, output V-output low level; If L end with respect to the N end for negative, this moment when alternating voltage is near zero point, voltage zero-cross Acquisition Circuit 26 output V+ output low levels, output V-output low level.
The zero current cross signal that current over-zero Acquisition Circuit 29 is gathered on first current sampling resistor 35 or second current sampling resistor 36; If it is from first current sampling resistor, 35 to second current sampling resistors 36 that zero current cross flows to; Then current over-zero is accepted and believed the output I+ output low level of circuit 29, output I-output low level; If it is that then current over-zero is accepted and believed the output I+ output low level of circuit 29, output I-output low level from second current sampling resistor, 36 to first current sampling resistors 35 that zero current cross flows to.
Adopt the switch of large power high voltage with standing power field effect pipe as solid-state relay; The drain electrode of two power tubes is respectively as the two-end-point of the switch of solid-state relay; Source electrode links to each other through two current sampling resistors, and the N end of AC power is as an input endpoint of the voltage zero-cross Acquisition Circuit of the utility model.
Present embodiment adopts two power tubes as switching tube, and the mode that can adopt a plurality of power tube parallel connections is in order to improve the conducting electric current of solid-state relay.
The utility model adopts the switch of large power high voltage with standing power field effect pipe as solid-state relay; Through voltage zero-cross Acquisition Circuit 26, current over-zero Acquisition Circuit 29, short-circuit signal Acquisition Circuit 27 and signal latch circuit 28, the voltage zero-cross that makes the ac solid relay of the utility model have AC power opens and current over-zero turn-off function, short circuit self-lock protection function.
More than show and described basic principle of the utility model and the advantage of principal character and the utility model.The technical staff of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection range to be defined by appending claims and equivalent thereof.
Claims (5)
1. an ac solid relay is characterized in that, comprises housing encapsulation (1) and is installed in power switch control circuit (2) and the power switch circuit (3) in the housing encapsulation (1);
Said power switch control circuit (2) comprises input termination control power input VCC; The DC-DC power circuit (21) of GND; The photoelectric switching circuit (22) of the said control power input of input termination VCC; Short-circuit signal Acquisition Circuit (27); The signal latch circuit (28) that is connected with short-circuit signal Acquisition Circuit (27) output; Current over-zero Acquisition Circuit (29); Voltage zero-cross Acquisition Circuit (26); The control logic circuit (23) that is connected with current over-zero Acquisition Circuit (29) and voltage zero-cross Acquisition Circuit (26) output; First drive circuit (24) that is connected with control logic circuit (23) and photoelectric switching circuit (22) output; Second drive circuit (25) that is connected with control logic circuit (23) and first drive circuit (24) output.
2. ac solid relay according to claim 1; It is characterized in that said power switch circuit (3) comprises second power field effect pipe (34) that first power field effect pipe (33) that first current sampling resistor (35) and second current sampling resistor (36) that is connected with first current sampling resistor (35) one ends and grid connect first drive circuit (24) output and grid connect second drive circuit (25) output.
3. ac solid relay according to claim 2; It is characterized in that; Said first current sampling resistor (35) is the output ground of DC-DC power circuit (21) with the common port of second current sampling resistor (36), and the other end of first current sampling resistor (35) and second current sampling resistor (36) all is connected with short-circuit signal Acquisition Circuit (27) and current over-zero Acquisition Circuit (29) input; The source electrode of said first power field effect pipe (33) connects the common port of first current sampling resistor (35) and short-circuit signal Acquisition Circuit (27), and the drain electrode of first power field effect pipe (33) is one of them output of switch of ac solid relay; The source electrode of said second power field effect pipe (34) connects the common port of second current sampling resistor (36) and short-circuit signal Acquisition Circuit (27), and the drain electrode of second power field effect pipe (34) is the switch another one output of ac solid relay; Two outputs of said signal latch circuit (28) connect the grid of first power field effect pipe (33) and the grid of second power field effect pipe (34) respectively; Output L, the N of two input termination solid-state relays of said voltage zero-cross Acquisition Circuit (26).
4. according to claim 2 or 3 described ac solid relays, it is characterized in that, also comprise first grid resistance (31) and second grid resistance (32); Said first grid resistance (31) is connected between the common port of common port and signal latch circuit (28) and first power field effect pipe (33) grid of first drive circuit (24) and second drive circuit (25); Said second grid resistance (32) is connected between the common port of output and signal latch circuit (28) and second power field effect pipe (34) grid of second drive circuit (25).
5. ac solid relay according to claim 1 and 2 is characterized in that, said housing encapsulation (1) comprises housing and the embedding casting glue in housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220185883 CN202602603U (en) | 2012-04-27 | 2012-04-27 | Alternating current solid relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220185883 CN202602603U (en) | 2012-04-27 | 2012-04-27 | Alternating current solid relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202602603U true CN202602603U (en) | 2012-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220185883 Expired - Fee Related CN202602603U (en) | 2012-04-27 | 2012-04-27 | Alternating current solid relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202602603U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105049017A (en) * | 2015-08-27 | 2015-11-11 | 库顿电子科技（厦门）有限公司 | Automatic breaking solid-state relay |
| TWI578363B (en) * | 2015-11-13 | 2017-04-11 | 環旭電子股份有限公司 | Electronic relay for starter motor |
| CN107681996A (en) * | 2017-10-26 | 2018-02-09 | 北京国科天宏自动化技术有限公司 | A kind of solid-state relay |
-
2012
- 2012-04-27 CN CN 201220185883 patent/CN202602603U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105049017A (en) * | 2015-08-27 | 2015-11-11 | 库顿电子科技（厦门）有限公司 | Automatic breaking solid-state relay |
| TWI578363B (en) * | 2015-11-13 | 2017-04-11 | 環旭電子股份有限公司 | Electronic relay for starter motor |
| CN107681996A (en) * | 2017-10-26 | 2018-02-09 | 北京国科天宏自动化技术有限公司 | A kind of solid-state relay |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181115 Address after: 1st-4th Floor, 11 Block C, No. 22, 88 Lane, Sijing Town, Songjiang District, Shanghai, 20101 Patentee after: Shanghai hyjas Electron Co., Ltd. Address before: Room 10, 1st Building, 6 Building, 4299 Jindu Road, Minhang District, Shanghai 201110 Patentee before: Shanghai Zunrui Electronic Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121212 Termination date: 20200427 |