CN105450090A - Direct-current soft brake solid-state relay - Google Patents
Direct-current soft brake solid-state relay Download PDFInfo
- Publication number
- CN105450090A CN105450090A CN201510981426.4A CN201510981426A CN105450090A CN 105450090 A CN105450090 A CN 105450090A CN 201510981426 A CN201510981426 A CN 201510981426A CN 105450090 A CN105450090 A CN 105450090A
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- Prior art keywords
- circuit
- chip microcomputer
- signal
- single chip
- thyristor
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- 230000000087 stabilizing effect Effects 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 22
- 239000010703 silicon Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 230000003750 conditioning effect Effects 0.000 abstract 2
- 238000007789 sealing Methods 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 19
- 239000007787 solid Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an AC motor
- H02P3/24—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an AC motor by applying DC to the motor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stopping Of Electric Motors (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
The invention discloses a direct-current soft brake solid-state relay, which comprises a thyristor, a thyristor trigger circuit, a single chip microcomputer, a power phase collection circuit, an RS485 communication circuit, an analogue quantity conditioning circuit and a voltage stabilizing circuit, wherein the power phase collection circuit is used for a linear voltage of a three-phase power supply and converting the linear voltage into a square wave signal to transmit to the single chip microcomputer; the RS485 communication circuit is used for setting parameters of the single chip microcomputer and interacting with the outside; the analogue quantity conditioning circuit is used for receiving a power adjusting signal, and outputting the signal to the single chip microcomputer after processing; the single chip microcomputer is used for receiving a positive and reverse rotation control signal, the square wave signal and the processed brake force adjusting signal and outputting the signals to the thyristor trigger circuit after processing; the thyristor trigger circuit is used for receiving the signals which are subjected to data processing by the single chip microcomputer and outputting the signals to the thyristor; the thyristor is used for driving a motor to work; and the voltage stabilizing circuit provides a power supply to the single chip microcomputer. The direct-current soft brake solid-state relay is stable and smooth to run, and good in sealing property.
Description
Technical field
The present invention relates to the soft braking type solid-state relay of a kind of direct current.
Background technology
Solid-state relay is a kind of by controllable silicon, and the contactless relay of circuits for triggering composition.Due to its fast response time, long service life, without advantages such as electric arc interference, is widely used in temperature and controls, the fields such as Electric Machine Control.Solid-state relay can be divided into DC solid-state relay and ac solid relay by its power supply controlled.Ac solid relay has can be divided into single-phase solid relay and three-phase solid relay.Three-phase solid relay can be divided into again universal three-phase solid-state relay and motor positive and inverse three-phase solid relay.
Common motor positive and inverse type three-phase solid relay is made up of two groups of universal three-phase solid-state relays and control signal interlock circuit.This solid-state relay can only control motor positive and inverse, can not brake, can not monitoring power voltage waveform in real time, and therefore, control precision is poor, and easy false triggering, easily causes three-phase shortcircuit.
Summary of the invention
The object of this invention is to provide the soft braking type solid-state relay of a kind of direct current, the soft braking type solid-state relay of this direct current not only can control the rotating of motor, but also when motor stops, can carrying out the soft braking of the variable direct current of braking moment to motor.
To achieve these goals, the technical solution used in the present invention is: the soft braking type solid-state relay of a kind of direct current, is characterized in that: comprise controllable silicon, thyristor gating circuit, single-chip microcomputer, power phase Acquisition Circuit, RS485 communicating circuit, analog quantity modulate circuit, voltage stabilizing circuit;
Described power phase Acquisition Circuit is for gathering the line voltage of three phase mains and being converted into square-wave signal and being transferred to single-chip microcomputer;
Described RS485 communicating circuit is used for setting the parameter of single-chip microcomputer and mutual with the external world;
Described analog quantity modulate circuit for receiving brake-force control signal, and exports single-chip microcomputer to by after signal transacting;
Described single-chip microcomputer for receiving the brake-force control signal after rotating control signal, square-wave signal, process, and exports thyristor gating circuit to after treatment;
Described thyristor gating circuit for receiving the signal after single-chip data process, and exports controllable silicon to;
Described controllable silicon is used for drive motors work;
Described voltage stabilizing circuit provides power supply for single-chip microcomputer.
Beneficial effect of the present invention: the soft braking type solid-state relay of direct current provided by the present invention, not only can control the rotating of motor, but also can when motor stops, the soft braking of the variable direct current of braking moment is carried out to motor, reach higher control precision, and eliminate the problem that false triggering causes three-phase shortcircuit.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of DC injection braking;
Fig. 2 is principle of the invention block diagram;
Fig. 3 is power phase Acquisition Circuit;
Fig. 4 is the input-output wave shape figure of power phase Acquisition Circuit;
Fig. 5 is optocoupler circuits for triggering;
Fig. 6 is isolating transformer circuits for triggering;
Fig. 7 is thyristor gating circuit of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Below with reference to Fig. 1 to Fig. 7, the present invention will be described.
DC injection braking technology is by passing into direct current to realize to the two-phase of three phase alternating current motor, and the size of braking moment can realize by regulating the size of direct current.Soft braking, also known as flexible braking, arrives the object of gradual braking by the size of braking moment during change motor braking exactly.
As Fig. 1 can see, when motor normally runs, the equal conducting of controllable silicon T1, T2, T3, T4, T5, T6.At this moment three-phase alternating current passes into motor, motor rotation.When needs make motor DC brake, make T1, T4, T5, T6 disconnect, T2, T7, T3 conducting, and at this moment T2, T3 form rectification circuit, and direct current is passed into motor, and T7 plays afterflow effect, makes direct current continuous.Because T7 can only work when motor DC is braked, when motor runs control, conducting can cause the line to line fault of three-phase alternating current.Therefore, opportunity of control machines must be controlled well.
The soft braking type solid-state relay of a kind of direct current, comprises controllable silicon, thyristor gating circuit, single-chip microcomputer, power phase Acquisition Circuit, RS485 communicating circuit, analog quantity modulate circuit, voltage stabilizing circuit; Described power phase Acquisition Circuit is for gathering the line voltage of three phase mains and being converted into square-wave signal and being transferred to single-chip microcomputer; Described RS485 communicating circuit is used for setting the parameter of single-chip microcomputer and mutual with the external world; Described analog quantity modulate circuit for receiving brake-force control signal, and exports single-chip microcomputer to by after signal transacting; Described single-chip microcomputer for receiving the brake-force control signal after rotating control signal, square-wave signal, process, and exports thyristor gating circuit to after treatment; Described thyristor gating circuit for receiving the signal after single-chip data process, and exports controllable silicon to; Described controllable silicon is used for drive motors work; Described voltage stabilizing circuit provides power supply for single-chip microcomputer.
Soft braking type solid-state relay not only has the control signal A controlling motor positive and inverse, B (A, the functional description of B is in table 1), also has the brake-force control signal of 0 ~ 10V, use this signal, the size of direct current when user can regulate DC injection braking, thus can the size of regulating brake force.
Table 1
User can also pass through RS485 communicating circuit, and by the data of soft for direct current braking write single-chip microcomputer, these data are the vector table of a power supply sine wave period and maximum stalling current percentage, can time dependent braking moment for producing when motor stops.Such as shown in table 2.
| Cycle | 1 | 2 | 3 |
| Stalling current | 10％ | 50％ | 100％ |
Table 2
Power phase Acquisition Circuit is for gathering the line voltage of three phase mains and being converted into square-wave signal and being transferred to single-chip microcomputer.Single-chip microcomputer calculates waveform and the frequency of the line voltage of three phase mains thus, and determines the opportunity of control machines thus.
Due in DC injection braking technology, the waveform of silicon controlled trigger timing and three-phase power line voltage is closely related.In motor positive and inverse controls and brakes, silicon controlled erroneous trigger probably causes the short circuit of three phase mains, causes silicon controlled to burn.Therefore three-phase mains voltage collection and analyze most important.
Fig. 3 is three-phase power line voltage collection circuit, and this circuit adopts the Darlington optocoupler gathering line voltage of high current transfer ratio, and is converted into the square wave corresponding with sine wave.In figure, U, V, W are the bus of three-phase electricity, Phase1 and Phase2 is the square-wave signal being input to single-chip microcomputer.
Fig. 4 is the waveform of the input and output of line voltage collection circuit.When solid-state relay is energized, single-chip microcomputer receives the signal of Phase1 and Phase2, calculates the frequency of power supply accordingly.The rising edge of Phase1 and Phase2 is silicon controlled minimum trigger angle.Monolithic processor controlled circuits for triggering are at this location triggered controllable silicon, and motor will obtain maximum stalling current.According to sinusoidal wave period, corresponding delayed trigger controllable silicon, can reduce the silicon controlled angle of flow, to reach the object reducing stalling current.
Traditional thyristor gating circuit adopts the control model of control machines optocoupler or isolating transformer to control controllable silicon.Optocoupler triggers can be divided into again non-zero cross fired and zero cross fired two kinds.
Fig. 5 is optocoupler circuits for triggering, in the circuit, the power source of silicon controlled trigger signal in alternating current, therefore without the need to providing special power supply for silicon controlled trigger signal.The optocoupler of this circuit is divided into zero cross fired optocoupler and non-zero cross fired optocoupler, and zero cross fired optocoupler can only trigger at the zero crossing of alternating current, and therefore reliability is high, but can not control the silicon controlled angle of flow.Non-zero cross fired optocoupler can trigger in the optional position of alternating current, but owing to can cause very high transient state trigger current in the peak value triggering of alternating voltage waveform, therefore reliability is poor.
Fig. 6 is isolating transformer circuits for triggering, and this circuit can trigger in the optional position of alternating current, but needs special DC power supply due to trigger end, and therefore the power consumption of control circuit is larger.
Fig. 7 is the thyristor gating circuit of solid-state relay of the present invention, and the pattern that have employed zero cross fired optocoupler and the combination of insulating power supply module of innovation, both ensure that the controllability of triggering in turn ensure that the power consumption of circuits for triggering is lower.
The above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art; under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and modification, these improvement of above-mentioned hypothesis and modification also should be considered as protection scope of the present invention.
Claims (1)
1. the soft braking type solid-state relay of direct current, is characterized in that: comprise controllable silicon, thyristor gating circuit, single-chip microcomputer, power phase Acquisition Circuit, RS485 communicating circuit, analog quantity modulate circuit, voltage stabilizing circuit;
Described power phase Acquisition Circuit is for gathering the line voltage of three phase mains and being converted into square-wave signal and being transferred to single-chip microcomputer;
Described RS485 communicating circuit is used for setting the parameter of single-chip microcomputer and mutual with the external world;
Described analog quantity modulate circuit for receiving brake-force control signal, and exports single-chip microcomputer to by after signal transacting;
Described single-chip microcomputer for receiving the brake-force control signal after rotating control signal, square-wave signal, process, and exports thyristor gating circuit to after treatment;
Described thyristor gating circuit for receiving the signal after single-chip data process, and exports controllable silicon to;
Described controllable silicon is used for drive motors work;
Described voltage stabilizing circuit provides power supply for single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510981426.4A CN105450090B (en) | 2015-12-17 | 2015-12-17 | A kind of soft braking type solid-state relay of direct current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510981426.4A CN105450090B (en) | 2015-12-17 | 2015-12-17 | A kind of soft braking type solid-state relay of direct current |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105450090A true CN105450090A (en) | 2016-03-30 |
| CN105450090B CN105450090B (en) | 2019-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510981426.4A Active CN105450090B (en) | 2015-12-17 | 2015-12-17 | A kind of soft braking type solid-state relay of direct current |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114047419A (en) * | 2021-09-26 | 2022-02-15 | 西门子工厂自动化工程有限公司 | Silicon controlled rectifier detector and silicon controlled rectifier performance detection method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0429582A (en) * | 1990-05-25 | 1992-01-31 | Mitsubishi Electric Corp | Interlock circuit |
| CN2759052Y (en) * | 2004-11-26 | 2006-02-15 | 沈阳新鹏达电气自动化有限公司 | Reversible soft start control device of alternating current motor |
| CN204761357U (en) * | 2015-06-08 | 2015-11-11 | 华帝股份有限公司 | Control device of silicon controlled speed-regulating range hood |
| CN205232073U (en) * | 2015-12-17 | 2016-05-11 | 特福隆（上海）科技有限公司 | Direct current cutback ejector half solid state relay |
-
2015
- 2015-12-17 CN CN201510981426.4A patent/CN105450090B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0429582A (en) * | 1990-05-25 | 1992-01-31 | Mitsubishi Electric Corp | Interlock circuit |
| CN2759052Y (en) * | 2004-11-26 | 2006-02-15 | 沈阳新鹏达电气自动化有限公司 | Reversible soft start control device of alternating current motor |
| CN204761357U (en) * | 2015-06-08 | 2015-11-11 | 华帝股份有限公司 | Control device of silicon controlled speed-regulating range hood |
| CN205232073U (en) * | 2015-12-17 | 2016-05-11 | 特福隆（上海）科技有限公司 | Direct current cutback ejector half solid state relay |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114047419A (en) * | 2021-09-26 | 2022-02-15 | 西门子工厂自动化工程有限公司 | Silicon controlled rectifier detector and silicon controlled rectifier performance detection method |
| CN114047419B (en) * | 2021-09-26 | 2024-06-07 | 西门子工厂自动化工程有限公司 | Silicon controlled rectifier detector and silicon controlled rectifier performance detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105450090B (en) | 2019-08-06 |
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