CN105450090B - A kind of soft braking type solid-state relay of direct current - Google Patents
A kind of soft braking type solid-state relay of direct current Download PDFInfo
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- CN105450090B CN105450090B CN201510981426.4A CN201510981426A CN105450090B CN 105450090 B CN105450090 B CN 105450090B CN 201510981426 A CN201510981426 A CN 201510981426A CN 105450090 B CN105450090 B CN 105450090B
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- circuit
- resistance
- chip microcontroller
- thyristor
- power supply
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stopping Of Electric Motors (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
The invention discloses a kind of soft braking type solid-state relays of direct current, including silicon-controlled, thyristor gating circuit, single-chip microcontroller, power phase Acquisition Circuit, RS485 communicating circuit, analog quantity conditioning circuit, voltage regulator circuit；Power phase Acquisition Circuit, which is used to acquire the line voltage of three phase mains and is converted into square-wave signal, is transferred to single-chip microcontroller；RS485 communicating circuit is used to carry out the parameter of single-chip microcontroller setting and the interaction with the external world；Analog quantity conditioning circuit will export after signal processing to single-chip microcontroller for receiving brake-force control signal；Single-chip microcontroller is exported after processing for receiving positive and negative rotation control signal, square-wave signal, treated brake-force control signal to thyristor gating circuit；Thyristor gating circuit is exported for receiving through single-chip data treated signal to silicon-controlled；It is silicon-controlled to work for driving motor；Voltage regulator circuit provides power supply for single-chip microcontroller.The soft braking type solid-state relay of the direct current runs smoothly, is smooth, and favorable sealing property.
Description
Technical field
The present invention relates to a kind of soft braking type solid-state relays of direct current.
Background technique
Solid-state relay is a kind of contactless relay being made of silicon-controlled and its trigger circuit.Due to its response speed
The advantages that degree is fast, long service life, and no electric arc interferes, is widely used in temperature control, the fields such as motor control.Solid-state after
Electric appliance can be divided into DC solid-state relay and ac solid relay by the power supply of its control.Ac solid relay has and can be divided into
Single-phase solid relay and three-phase solid relay.Three-phase solid relay can be divided into universal three-phase solid-state relay and electricity again
Machine positive and negative rotation three-phase solid relay.
Common motor positive and inverse type three-phase solid relay is by two groups of universal three-phase solid-state relays and control signal
Interlock circuit composition.The solid-state relay can only control motor positive and inverse, cannot brake, and can not monitor supply voltage wave in real time
Shape, therefore, control accuracy difference is easy false triggering, easily leads to three-phase shortcircuit.
Summary of the invention
The object of the present invention is to provide a kind of soft braking type solid-state relay of direct current, the soft braking type solid-state relays of the direct current
It not only can control the positive and negative rotation of motor, but also the variable direct current of braking moment can be carried out to motor when motor stops
Soft braking.
To achieve the goals above, the technical solution adopted by the present invention is that: a kind of soft braking type solid-state relay of direct current,
It is characterized in that: including silicon-controlled, thyristor gating circuit, single-chip microcontroller, power phase Acquisition Circuit, RS485 communicating circuit, simulation
Measure conditioning circuit, voltage regulator circuit；
The power phase Acquisition Circuit is used to acquire the line voltage of three phase mains and is converted into square-wave signal transmission
To single-chip microcontroller；
The RS485 communicating circuit is used to carry out the parameter of single-chip microcontroller setting and the interaction with the external world；
The analog quantity conditioning circuit will export after signal processing to single-chip microcontroller for receiving brake-force control signal；
The single-chip microcontroller is passed through for receiving positive and negative rotation control signal, square-wave signal, treated brake-force control signal
It exports after processing to thyristor gating circuit；
The thyristor gating circuit is exported for receiving through single-chip data treated signal to silicon-controlled；
It is described silicon-controlled for driving motor work；
The voltage regulator circuit provides power supply for single-chip microcontroller.
Beneficial effects of the present invention: the soft braking type solid-state relay of direct current provided by the present invention not only can control electricity
The positive and negative rotation of machine, but also the variable soft braking of direct current of braking moment can be carried out to motor, reach higher when motor stops
Control precision, and eliminate the problem of false triggering leads to three-phase shortcircuit.
Detailed description of the invention
Fig. 1 is the schematic diagram of DC injection braking；
Fig. 2 is invention's principle 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 trigger circuit；
Fig. 6 is isolating transformer trigger circuit；
Fig. 7 is thyristor gating circuit of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
Below with reference to Fig. 1 to Fig. 7, the present invention will be described.
DC injection braking technology is realized by being passed through direct current to the two-phase of three phase alternating current motor, braking moment it is big
It is small to be realized by adjusting the size of DC current.Soft braking is also known as flexible braking, when being exactly by changing motor braking
The size of braking moment reaches the purpose of gradual braking.
Such as Fig. 1, it can be seen that, when motor operates normally, silicon-controlled T1, T2, T3, T4, T5, T6 are both turned on.At this moment three-phase
Alternating current is passed through motor, motor operating.When needing brakes motor DC, make T1, T4, T5, T6 is disconnected, and T2, T7, T3 are led
Logical, at this moment T2, T3 form rectification circuit, direct current are passed through motor, T7 plays afterflow, keeps DC current continuous.Due to T7
It can only work when motor DC is braked, in motor operation control, conducting will lead to the line to line fault of three-phase alternating current.Therefore,
The opportunity of control machines must be controlled.
A kind of soft braking type solid-state relay of direct current, including silicon-controlled, thyristor gating circuit, single-chip microcontroller, power phase
Acquisition Circuit, RS485 communicating circuit, analog quantity conditioning circuit, voltage regulator circuit；The power phase Acquisition Circuit is for acquiring three
The line voltage of phase power supply is simultaneously converted into square-wave signal and is transferred to single-chip microcontroller；The RS485 communicating circuit is used for single-chip microcontroller
Parameter carry out setting and with extraneous interaction；The analog quantity conditioning circuit will be believed for receiving brake-force control signal
Output is to single-chip microcontroller after number processing；The single-chip microcontroller is for receiving positive and negative rotation control signal, square-wave signal, treated brake force
Adjustment signal, and exported after processing to thyristor gating circuit；The thyristor gating circuit is for receiving through single-chip microcontroller number
According to treated signal, and export to silicon-controlled；It is described silicon-controlled for driving motor work；The voltage regulator circuit is single-chip microcontroller
Power supply is provided.
Soft braking type solid-state relay not only have control motor positive and inverse control signal A, B (A, B function description be shown in Table
1), there are also the brake-force control signals of 0~10V, with the signal, the size of DC current when user's adjustable DC injection braking,
So as to the size of regulating brake force.
Table 1
Single-chip microcontroller can also be written, which is one by RS485 communicating circuit in the data of the soft braking of direct current by user
The vector table of power supply sine wave period and maximum stalling current percentage can be changed over time for generating when motor stops
Braking moment.Such as shown in table 2.
| Period | 1 | 2 | 3 |
| Stalling current | 10% | 50% | 100% |
Table 2
Power phase Acquisition Circuit, which is used to acquire the line voltage of three phase mains and is converted into square-wave signal, is transferred to list
Piece machine.Thus single-chip microcontroller calculates the waveform and frequency of the line voltage of three phase mains, and thus determine the opportunity of control machines.
Since in DC injection braking technology, silicon-controlled trigger timing and the waveform of three phase mains line voltage are closely related.?
In motor positive and inverse control and braking, silicon-controlled erroneous trigger is likely to cause the short circuit of three phase mains, causes silicon-controlled
It burns.Therefore three-phase mains voltage is acquired and is analyzed most important.
Fig. 3 is three-phase power line voltage collection circuit, which uses the Darlington optocoupler gathering line of high current transfer ratio
Voltage, and it is converted into square wave corresponding with sine wave.U, V, W are the bus of three-phase electricity, Phase1 and Phase2 in figure
For the square-wave signal for being input to single-chip microcontroller.
Fig. 4 is the waveform of line voltage Acquisition Circuit output and input.When solid-state relay is powered, single-chip microcontroller is received
The signal of Phase1 and Phase2 calculates the frequency of power supply accordingly.The rising edge of Phase1 and Phase2 be it is silicon-controlled most
Small Trigger Angle.Monolithic processor controlled trigger circuit triggers silicon-controlled in the position, and motor will obtain maximum stalling current.According to just
In the period of string wave, corresponding delay triggering is silicon-controlled, can reduce the silicon-controlled angle of flow, to reach the mesh for reducing stalling current
's.
Traditional thyristor gating circuit is controlled using the control model of control machines optocoupler or isolating transformer can
Control silicon.Optocoupler triggering can be divided into non-zero cross fired and two kinds of zero cross fired again.
Fig. 5 is optocoupler trigger circuit, and in the circuit, the power source of silicon controlled trigger signal is in alternating current, therefore nothing
Special power supply need to be provided for silicon controlled trigger signal.The optocoupler of the circuit is divided into zero cross fired optocoupler and non-zero cross fired light
Coupling, zero cross fired optocoupler can only be triggered in the zero crossing of alternating current, therefore high reliablity, but not can control silicon-controlled conducting
Angle.Non- zero cross fired optocoupler can be triggered in any position of alternating current, but since the peak value in alternating voltage waveform triggers meeting
Lead to very high transient state trigger current, therefore reliability is poor.
Fig. 6 is isolating transformer trigger circuit, which can trigger in any position of alternating current, but since triggering end needs
Special DC power supply is wanted to power, 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 innovation uses zero cross fired optocoupler and isolation
The mode that power module combines, both ensure that the controllability of triggering in turn ensured that the power consumption of trigger circuit is lower.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, above-mentioned hypothesis these
Improvement and modification also should be regarded as protection scope of the present invention.
Claims (1)
1. a kind of soft braking type solid-state relay of direct current, it is characterised in that: including silicon-controlled, thyristor gating circuit, single-chip microcontroller,
Power phase Acquisition Circuit, RS485 communicating circuit, analog quantity conditioning circuit, voltage regulator circuit；
The power phase Acquisition Circuit, which is used to acquire the line voltage of three phase mains and is converted into square-wave signal, is transferred to list
Piece machine；Using the Darlington optocoupler gathering line voltage of high current transfer ratio, and it is converted into square wave corresponding with sine wave；
The RS485 communicating circuit is used to carry out the parameter of single-chip microcontroller setting and the interaction with the external world；The RS485 communication electricity
Single-chip microcontroller is written in the data of the soft braking of direct current by road, which is a power supply sine wave period and maximum stalling current percentage
Vector table；
The analog quantity conditioning circuit will export after signal processing to single-chip microcontroller for receiving brake-force control signal；
The single-chip microcontroller is for receiving positive and negative rotation control signal, square-wave signal, treated brake-force control signal, and through handling
After export to thyristor gating circuit；
The thyristor gating circuit is exported for receiving through single-chip data treated signal to silicon-controlled；It is described can
Control the mode that silicon trigger circuit uses zero cross fired optocoupler and isolated power supply module combines；
The thyristor gating circuit includes resistance R1, triode Q1, DC power supply VCC, isolated power supply U1, diode D1, electricity
Hinder R2, resistance R3, diode D2, thyristor T1, resistance R4, zero-crossing switching optocoupler U2, zero-crossing switching optocoupler U3, resistance R7, three
Pole pipe Q2, resistance R5, resistance R6, diode D3 and one end of thyristor T2, the resistance R1 and one end of the single-chip microcontroller connect
It connecing, the other end of the resistance R1 is connect with the base stage of the triode Q1, the emitter ground connection of the triode Q1, and described three
The collector of pole pipe Q1 is connect with the pin 1 of the isolated power supply, the pin 2 of the isolated power supply and the DC power supply VCC
Connection, the pin 4 of the isolated power supply U1 respectively with one end of the resistance R3, the anode of diode D2, thyristor T1 yin
Pole is connected with the anode of thyristor T2, and the pin 5 of the isolated power supply U1 is connect with the anode of the diode D1, two pole
The cathode of pipe D1 is connect with one end of the resistance R2, and the pin 6 of the zero-crossing switching optocoupler U2 is respectively with the resistance R2's
The other end, the other end of resistance R3, diode D2 cathode connected with the control electrode of thyristor T1, the zero-crossing switching optocoupler U2
Pin 1 connect with the DC power supply VCC by the resistance R4, the pin 2 of the zero-crossing switching optocoupler U2 and the mistake
The pin 1 of zero shutdown optocoupler U3 connects, and the pin 2 of the zero-crossing switching optocoupler U3 is connect with the collector of the triode Q2,
The emitter of the triode Q2 is grounded, and the base stage of the triode Q2 passes through the other end of the resistance R7 and the single-chip microcontroller
Connection, the pin 6 of the zero-crossing switching optocoupler U3 are connect with the pin 4 of the zero-crossing switching optocoupler U2, the zero-crossing switching light
The pin 4 of coupling U3 is connect with one end of the resistance R5, the other end of the resistance R5 respectively with one end of the resistance R6, two
The cathode of pole pipe D3 is connected with the control electrode of thyristor T2, and the anode of the thyristor T1 is another with the resistance R6 respectively
It holds, the anode of diode D3 is connected with the cathode of thyristor T2；
It is described silicon-controlled for driving motor work；
The voltage regulator circuit provides power supply for single-chip microcontroller.
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 |
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| Publication Number | Publication Date |
|---|---|
| CN105450090A CN105450090A (en) | 2016-03-30 |
| CN105450090B true 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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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2759052Y (en) * | 2004-11-26 | 2006-02-15 | 沈阳新鹏达电气自动化有限公司 | Reversible soft starting controller for AC electric machine |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0429582A (en) * | 1990-05-25 | 1992-01-31 | Mitsubishi Electric Corp | Interlock circuit |
-
2015
- 2015-12-17 CN CN201510981426.4A patent/CN105450090B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2759052Y (en) * | 2004-11-26 | 2006-02-15 | 沈阳新鹏达电气自动化有限公司 | Reversible soft starting controller for AC electric machine |
| 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 |
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| CN105450090A (en) | 2016-03-30 |
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