CN208691155U - A kind of efficient phase control rectifier driving circuit of self-shield - Google Patents
A kind of efficient phase control rectifier driving circuit of self-shield Download PDFInfo
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- CN208691155U CN208691155U CN201821325457.XU CN201821325457U CN208691155U CN 208691155 U CN208691155 U CN 208691155U CN 201821325457 U CN201821325457 U CN 201821325457U CN 208691155 U CN208691155 U CN 208691155U
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Abstract
The utility model relates to power electronics fields; especially a kind of efficient phase control rectifier driving circuit of self-shield; CPU detects the phase of input voltage by synchronization signal detection circuit; CPU connects three-phase bridge phase control rectifier circuit with three-phase bridge temperature signal detection circuit by driving circuit, D.C. current detecting circuit, DC voltage detection circuit; main circuit contact device connects three-phase bridge phase control rectifier circuit; temperature signal detection circuit; intermediate relay connects main circuit contact device, load connection three-phase type phase control rectifier circuit.The utility model acquires three-phase input voltage synchronization signal to CPU, and the genlocing to three-phase voltage phase is then realized using PHASE-LOCKED LOOP PLL TECHNIQUE；By on main circuit three-phase bridge temperature signal, the fault-signal of driving circuit, DC bus d. c. voltage signal, be sent into CPU after direct current detection signal acquisition.
Description
Technical field
The utility model relates to power electronics field, especially a kind of efficient phase control rectifier driving circuit of self-shield.
Background technique
The industries such as coal mine, rail traffic have very strong dependence to rectifier, controllable or uncontrollable straight for obtaining
Galvanic electricity pressure.Diode is widely used in conventional rectification link can not control rectifying circuit and Thyristor Controlled rectification circuit.With rail
Road traffic rapid development, demand of the rail traffic to megawatt-grade high-power phase controlled rectifier are being continuously increased, high power, big electricity
It flows, the thyristor device of high voltage is widely used in field of track traffic；And it exploits and imitates along with China's coal-mine
The continuous improvement of rate, high-power coal cutter group and transporting equipment are constantly applied, and the frequency control of these power-equipments is all logical
It crosses and power grid is transmitted into AC rectification into direct current, then realize DC inverter to motor at the alternating current of different frequency
Frequency control, the requirement of mine equipment plant capacity being continuously increased to its mine-used frequency-converter front-end rectifier power is not yet
Disconnected to increase, powerful phase control rectifier switching device is just widely used on coal mine, and this requires match for power device
Powerful phase control rectifier driving circuit.Powerful switching device is in rail traffic, the extensive use of coal mine, to phase control rectifier
The safety of circuit will also be paid attention to, this just needs driving circuit to have self-protection function, i.e., when rectification circuit breaks down
When, driving circuit can effectively be detected fault-signal and be cut off the power using corresponding actions.It can be seen that anxious on coal mine, rail traffic
Need a kind of large power high efficiency and the phase control rectifier driving circuit with self-protection function.
It is found by market survey, the existing generally existing following defect of phase control rectifier driving circuit: 1, circuit structure is set
Meter is complicated, causes its failure rate relatively high, when a failure occurs it, is difficult to split into driving circuit into modules and carries out dispersion test
With maintenance, engineer is difficult to find the accurate location of failure in a short time；2, driving circuit automatic protection functions are not complete, cannot
Fully achieve all defencive functions to DC bus over-voltage, overcurrent, driving circuit failure.
Therefore, it is necessary to propose a kind of efficient phase control rectifier driving circuit of self-shield in response to the above problems.
Utility model content
The utility model aim is to overcome deficiency in the prior art, provides a kind of efficient phase control rectifier drive of self-shield
Dynamic circuit.
In order to solve the above-mentioned technical problem, the utility model is achieved through the following technical solutions:
A kind of efficient phase control rectifier driving circuit of self-shield, including three-phase bridge phase control rectifier circuit, CPU, driving circuit,
Intermediate relay, main circuit contact device, synchronization signal detection circuit, three-phase bridge temperature signal detection circuit, direct current detection
Circuit, DC voltage detection circuit and load, the CPU connect three-phase bridge phase control rectifier electricity by synchronization signal detection circuit
Road, the CPU connect three-phase bridge phase control rectifier with DC voltage detection circuit by driving circuit, D.C. current detecting circuit
Circuit, the main circuit contact device connect three-phase bridge temperature signal detection circuit, and the intermediate relay connects main circuit contact
Device, the load connect three-phase bridge phase control rectifier circuit.
Preferably, the driving circuit include pulse signal formed circuit, signal circuit, power amplification circuit and
Protect circuit；The pulse signal forms circuit and connects power amplification circuit, the power amplification electricity by signal circuit
Road connection protection circuit.
Preferably, the pulse signal forms circuit and exports 6 tunnels using the control circuit of PWM technology and dsp chip composition
The on-off of control main circuit thyristor is gone in pulse.
Preferably, the power amplification circuit includes that pulse transformer input circuit, pulse transformer, pulse transformer are defeated
Driving circuit out；The pulse transformer input circuit connects pulse transformer output driving circuit by pulse transformer.
Preferably, the protection circuit includes fault detection circuit；The fault detection circuit include comparator circuit, with
Gate circuit, latch circuit and relay drive circuit；The comparator circuit connects latch circuit, institute by AND gate circuit
State latch circuit connection relay drive circuit.
The utility model is the utility model has the advantages that the utility model acquires three-phase input voltage synchronization signal to CPU, then using lock
Phase loop technique realizes the genlocing to three-phase voltage phase；The failure of main circuit three-phase bridge temperature signal, driving circuit is believed
Number, the d. c. voltage signal on DC bus, after direct current detection signal acquisition be sent into CPU, when circuit direct busbar voltage
Over-voltage, stream bus current overcurrent, excess temperature or when driving circuit breaks down control master automatically using intermediate relay K1
The shutdown of circuit contactor K2 realizes the self-protection function of circuit to cut off the input of three-phase alternating current, and is simultaneously stopped load
Work；The regulatory function of output DC voltage, electric current is realized by software PI；
With power electronic technique, automatic technology, the driving to high-power phase control rectifier circuit high efficient and reliable is realized
And high reliablity has self-protection function.Very big market prospects will be had in power electronics field.
Make furtherly below with reference to technical effect of the attached drawing to the design of the utility model, specific structure and generation
It is bright, to be fully understood from the purpose of this utility model, feature and effect.
Detailed description of the invention
Fig. 1 is the principles of the present invention figure；
Fig. 2 is the signal circuit of the utility model
Fig. 3 is the level shifting circuit figure of the utility model；
Fig. 4 is the power amplification circuit figure of the utility model；
Fig. 5 (a) is the fault detection circuit figure of the utility model；
Fig. 5 (b) is the relay drive circuit figure of the utility model.
Specific embodiment
The embodiments of the present invention are described in detail below in conjunction with attached drawing, but the utility model can be by right
It is required that the multitude of different ways for limiting and covering is implemented.
Such as Fig. 1 is simultaneously combined shown in Fig. 2 to Fig. 5, a kind of efficient phase control rectifier driving circuit of self-shield, including three-phase bridge phase
Control rectifying circuit, CPU, driving circuit, intermediate relay, main circuit contact device, synchronization signal detection circuit, three-phase bridge temperature letter
Number detection circuit, D.C. current detecting circuit, DC voltage detection circuit and load, the CPU pass through synchronization signal detection electricity
Road connects three-phase bridge phase control rectifier circuit, and the CPU passes through driving circuit, D.C. current detecting circuit and DC voltage detection
Circuit connection three-phase bridge phase control rectifier circuit, the main circuit contact device connect three-phase bridge phase control rectifier circuit, it is described in
Between relay connect main circuit contact device, load connection three-phase bridge phase control rectifier circuit.
Further, the driving circuit include pulse signal formed circuit, signal circuit, power amplification circuit with
And protection circuit；The pulse signal forms circuit and connects power amplification circuit, the power amplification by signal circuit
Circuit connection protects circuit.
As Figure 1-Figure 4: pulse signal forms the CPU in circuit by algorithm, issues 6 road pulse signal T1-T6, send
People exports 6 tunnel pulse M1-M6 to signal circuit, is sent into level shifting circuit, output signal J1-J6, power amplification of making a gift to someone
Circuit generates 6 tunnel pulse G1-G6, driving thyristor work.
Further, the pulse signal forms circuit using the control circuit output 6 of PWM technology and dsp chip composition
The on-off of control main circuit thyristor is gone in road pulse.
Wherein, the power amplification circuit includes pulse transformer input circuit, pulse transformer, pulse transformer output
Driving circuit；The pulse transformer input circuit connects pulse transformer output driving circuit by pulse transformer.
In addition, the protection circuit includes fault detection circuit；The fault detection circuit includes comparator circuit and door
Circuit, latch circuit and relay drive circuit；The comparator circuit connects latch circuit by AND gate circuit, described
Latch circuit connects relay drive circuit.
Phase control rectifier circuit output voltage U, the electric current I detected pass through comparison circuit, the voltage U and I signal of output, and
Short-circuit SC signal is sent into latch, the control signal CPU_ of Latch output signal and CPU by synthesizing a signal with door
RLY signal phase and control driving relay work.
The utility model acquires three-phase input voltage synchronization signal to CPU, is then realized using PHASE-LOCKED LOOP PLL TECHNIQUE to three-phase
The genlocing of voltage-phase；By the direct current on main circuit three-phase bridge temperature signal, the fault-signal of driving circuit, DC bus
Be sent into CPU after voltage signal, direct current detection signal acquisition, when the over-voltage of circuit direct busbar voltage, stream bus current overcurrent,
Excess temperature or when driving circuit breaks down, using intermediate relay K1 automatically come control the shutdown of main circuit contact device K2 come
The input of three-phase alternating current is cut off to realize the self-protection function of circuit, and is simultaneously stopped loaded work piece；It is realized by software PI
Export the regulatory function of DC voltage, electric current；
With power electronic technique, automatic technology, the driving to high-power phase control rectifier circuit high efficient and reliable is realized
And high reliablity has self-protection function.Very big market prospects will be had in power electronics field.
Working principle is as follows:
(1) as shown in fig. 1, pulse signal is formed circuit and is exported using the control circuit of PWM technology and dsp chip composition
The on-off of control main circuit thyristor is gone in 6 tunnel pulses, and dsp chip issues 6 tunnel PWM wave T1~T6.
(2) signal circuit is as shown in Figure 2.It include the transmission of 6 road start pulse signals in figure.Because of the work on this 6 tunnel
Make that principle is identical, the 1st tunnel where taking pulse signal T1 is illustrated.
In Fig. 2, U1 is that light thousand drives NAND gate logical transition chip, the output of 3 pin of input control of 1,2 pins；
6, the output of 5 pin of input control of 7 pins.The 1st road pulse signal T1 that DSP is issued connects 2 pins of U1 chip.When T1 signal
When for high level, since 1 pin is high level, so the output of 3 pins is low level signal.GXT1 is that fiber-optic signal exports core
1, the 2 pins pull-up of piece, light signal output end GXT1 is high level, because of 2 pin of output end of optical fiber head signal and chip U1
3 pins be connected, T1 be high level when, 2 pins of light signal output end are also low level, inside optical fiber head GXT1 shine
Diode current flow.As the reception chip GXR1 of optical signal transmission to optical signal, internal photodiode conducting, GXR1's
1 pin is connected with 2 pins, exports as low level.When T1 is low level pulse signal, i.e., 2 pins of chip U1 are low pulse
Signal, the output signal for obtaining 3 pin of U1 chip through NAND gate are high level, and 2 pins of optical fiber head GXT1 are high level, light at this time
Diode inside fine head GXT1 is not turned on.Optical fiber head GXR1 does not receive optical signal, and internal photodiode does not have
Conducting, so its 1 pin is not pulled low, exports as high level.
(3) level shifting circuit is as shown in Figure 3.
6 road phase-shift pulse trigger signal M1, M2, M3, M4, M5, M6 in Fig. 2 by the electrical level transferring chip in Fig. 3 will+
The signal of 5V is converted into+15V signal.The 6 road input pins default pull-up of electrical level transferring chip is low level, avoids interference signal
Influence to circuit.
(4) power amplification circuit is as shown in figure 4, defeated by pulse transformer input circuit, pulse transformer, pulse transformer
Driving circuit forms out.
In Fig. 4 ,+5V level conversion is touched at 6 tunnel output signal J1, J2, J3, J4, J5, J6 of+15V electrical level transferring chip
Hair pulse information passes through gate-drive resistance R10, R20, R30, R40, R50, R60 driving metal-oxide-semiconductor Q1-Q6 respectively.Because of 6 road arteries and veins
The power amplification circuit of punching is identical, and 1 tunnel therein is taken to be illustrated, and the 1st tunnel where pulse signal T1 is still taken to be illustrated.Arteries and veins
Rushing transformer voltage ratio is 1:1, when pulse signal J1 is high level, i.e. pulse transformer TR1 primary circuit resistance R10 access
Signal is high level, and metal-oxide-semiconductor Q1 is connected, and 1 foot of pulse transformer TR1 primary side meets+24V, and 2 feet are since Q1 conducting meets GND, this clock pulse
Rush the positive pulse signal that transformer TR1 primary side is+24V；When pulse signal J1 is low level, metal-oxide-semiconductor Q1 shutdown, pulse at this time
Transformer TR1 original is than the signal for 0V.Pulse transformer pair side just exports identical as trigger pulse T1 frequency in this way, and amplitude is different
Pulse signal, be rectified into direct current by single-phase half-wave rectifier circuit, driving thyristor work.Voltage-stabiliser tube ZD1 and diode D5
Continuous current circuit is constituted, when metal-oxide-semiconductor Q1 shutdown, protects pulse transformer.
(5) protection circuit fault detection circuit, relay drive circuit as shown in figure 5, be made of.
Shown in fault detection circuit such as Fig. 5 (a), mainly by comparator circuit, AND gate circuit, latch circuit and relay
Driving circuit composition.VCC is benchmark voltage source, is sent to 3 feet and 5 feet of U2, by the way that the value of R5 and R6 is arranged, adjusts the electricity of input
A reference value is pressed, 1 foot and 7 feet of U1 is respectively voltage and current fault output signal, and high level is normal information, and low level is event
Hinder information.The DC bus-bar voltage signal detected is accessed by resistance R4, when the voltage detecting letter that 2 pins of comparator U2 access
Number be higher than 3 pin reference voltage when, 1 pin of U2 becomes low level output from normal high level.The 6 pins access of U2B
It is DC bus current detection signal, when the signal of 6 pins is higher than the voltage of 5 pins, 7 pin of output pin of U2B is low
Level.1 foot of U2 and the output of 7 foot signals are coupled on 1 foot and 2 feet of U1, and high level is normal signal, and low level is failure
Signal, the two signal phases and 9 pins for being connected to U1.The 5 pins input of U1 is phase control rectifier short circuit signal, and circuit occurs
When short trouble, it is normally high level signal that SC signal, which is low level,.Three fault-signal Xiang Yuhou, are output to U3 latch
4 feet.5 pins of latch U3 by the level of 4 pins be latched as with 4 pin state consistencies, high level is normal signal, low electricity
It puts down as fault-signal.6 feet of U3 are cpu fault reset signal.The 4 foot fault-signals of U3 are input to 12 feet of U3 and CPU is provided
Relay command signal phase and signal, control relay K1 work.
Shown in relay drive circuit such as Fig. 5 (b), when circuit is there is no when failure, FAULT signal is high level,
CPU_RLY controls signal to high level, and 11 pins of U1D are high level, metal-oxide-semiconductor conducting, intermediate relay closure, intermediate relay
The main circuit contact device closure of device control, main circuit access the alternating current of power grid.When circuit direct bus occur over-voltage, overcurrent,
When attack, excess temperature, driving circuit failure, FAULT signal is low level, and the output signal of U1D is low level, and metal-oxide-semiconductor turns off,
Intermediate relay controls the power grid alternating current that main contactor disconnects access, to realize self-protection function.
Compared with original phase control rectifier driving circuit, the advantages of this circuit:
(1) modularized design is used, pulse transformer is formed into circuit with trigger pulse and is separately designed, convenient for assembling and dimension
It repairs；(2) pulse transformer and pulse shaping circuit are attached using optical fiber, there is remote transmission and control function, resist
Interference performance is strong；(3) control is realized so that high frequency spurs be inhibited to be passed to control circuit using pulse transformer driving method
The electrical isolation of circuit and rectification circuit；(4) especially with DC bus over-voltage, overcurrent, driving circuit failure when from
Defencive function.
The preferred embodiments of the present invention have been described in detail above.It should be appreciated that the ordinary skill people of this field
Member according to the present utility model can conceive without creative work makes many modifications and variations.Therefore, all this technology necks
Technical staff passes through logic analysis, reasoning or limited reality according to the design of the utility model on the basis of existing technology in domain
Available technical solution is tested, it all should be within the scope of protection determined by the claims.
Claims (5)
1. a kind of efficient phase control rectifier driving circuit of self-shield, it is characterised in that: including three-phase bridge phase control rectifier circuit, CPU,
Driving circuit, intermediate relay, main circuit contact device, synchronization signal detection circuit, three-phase bridge temperature signal detection circuit, direct current
Current detection circuit, DC voltage detection circuit and load, the CPU connect three-phase bridge phase by synchronization signal detection circuit
Control rectifying circuit and three-phase bridge temperature signal detection circuit, the CPU pass through driving circuit, D.C. current detecting circuit and direct current
Voltage detecting circuit connects three-phase bridge phase control rectifier circuit, the main circuit contact device connection three-phase bridge phase control rectifier electricity
Road, the intermediate relay connect main circuit contact device, and the load connects three-phase bridge phase control rectifier circuit.
2. a kind of efficient phase control rectifier driving circuit of self-shield as described in claim 1, it is characterised in that: the driving circuit
Circuit, signal circuit, power amplification circuit and protection circuit are formed including pulse signal；The pulse signal forms electricity
Road connects power amplification circuit, the power amplification circuit connection protection circuit by signal circuit.
3. a kind of efficient phase control rectifier driving circuit of self-shield as claimed in claim 2, it is characterised in that: the pulse signal
It forms circuit and goes the logical of control main circuit thyristor using the control circuit 6 tunnel pulses of output of PWM technology and dsp chip composition
It is disconnected.
4. a kind of efficient phase control rectifier driving circuit of self-shield as claimed in claim 2, it is characterised in that: the power amplification
Circuit includes pulse transformer input circuit, pulse transformer, pulse transformer output driving circuit；The pulse transformer is defeated
Enter circuit and pulse transformer output driving circuit is connected by pulse transformer.
5. a kind of efficient phase control rectifier driving circuit of self-shield as claimed in claim 2, it is characterised in that: the protection circuit
Including fault detection circuit；The fault detection circuit includes that comparator circuit, AND gate circuit, latch circuit and relay drive
Dynamic circuit；The comparator circuit connects latch circuit by AND gate circuit, and the latch circuit connects relay driving
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821325457.XU CN208691155U (en) | 2018-08-16 | 2018-08-16 | A kind of efficient phase control rectifier driving circuit of self-shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821325457.XU CN208691155U (en) | 2018-08-16 | 2018-08-16 | A kind of efficient phase control rectifier driving circuit of self-shield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208691155U true CN208691155U (en) | 2019-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821325457.XU Expired - Fee Related CN208691155U (en) | 2018-08-16 | 2018-08-16 | A kind of efficient phase control rectifier driving circuit of self-shield |
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| Country | Link |
|---|---|
| CN (1) | CN208691155U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108809124A (en) * | 2018-08-16 | 2018-11-13 | 华北科技学院 | A kind of efficient phase control rectifier driving circuit of self-shield |
-
2018
- 2018-08-16 CN CN201821325457.XU patent/CN208691155U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108809124A (en) * | 2018-08-16 | 2018-11-13 | 华北科技学院 | A kind of efficient phase control rectifier driving circuit of self-shield |
| CN108809124B (en) * | 2018-08-16 | 2024-03-19 | 华北科技学院 | Self-protection efficient phase-control rectification drive circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| 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: 20190402 Termination date: 20190816 |