CN109347313A - Bypass module for high voltage transducer power unit - Google Patents
Bypass module for high voltage transducer power unit Download PDFInfo
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- CN109347313A CN109347313A CN201811253138.7A CN201811253138A CN109347313A CN 109347313 A CN109347313 A CN 109347313A CN 201811253138 A CN201811253138 A CN 201811253138A CN 109347313 A CN109347313 A CN 109347313A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
- G01R31/3274—Details related to measuring, e.g. sensing, displaying or computing; Measuring of variables related to the contact pieces, e.g. wear, position or resistance
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Power Engineering (AREA)
- Theoretical Computer Science (AREA)
- Electronic Switches (AREA)
Abstract
The invention discloses a kind of bypass modules for high voltage transducer power unit, bypass driving circuit including the bypass contactor switch for driving power unit, the bypass module further includes bypass condition detection circuit, bypass failure feed circuit and communication failure feed circuit, bypass condition detection circuit is for detecting whether bypass contactor drives success, the signal for the bypass failure that bypass failure feed circuit is used to detect bypass condition detection circuit feeds back to the master control system of high-voltage frequency converter, communication failure feed circuit is for timely feedbacking the signal of bypass fibers communication failure to the master control system of frequency converter.Using triode operation in bypass driving circuit in saturation region, collector is connected with emitter, relay is obtained into electric actuation, and shows that by-passing signal has issued in time by the first signal circuit, so that bypass driving circuit has the advantages that structure is simple, at low cost and high reliablity.
Description
Technical field
The present invention relates to converter technology fields, and in particular to a kind of bypass mould for high voltage transducer power unit
Block.
Background technique
With the development of power electronics technology, increasingly by the application of the high-voltage frequency converter of cascade of power units technological maheup
Extensively.In cascaded high-voltage frequency converter application, since high-voltage motor is typically employed in the crucial occasion of comparison, high voltage variable
Frequency device failure will seriously affect the normal production of enterprise, or even cause heavy economic losses.For this purpose, generalling use power cell
Shunting device can guarantee to promote the stability and reliability of high-voltage frequency converter when the part of high-voltage frequency converter is broken down
It runs without interruption, avoids the shutdown of high-voltage frequency converter.
In cascaded high-voltage frequency converter, each power cell installs a set of power unit by-pass device, power cell
Shunting device includes bypass contactor and bypass module.When high-voltage frequency converter detects that event occurs for some power cell in operation
When barrier, in order not to cause entire frequency converter to shut down, the output of the trouble unit is turned off, triggers bypass contactor action signal.It is logical
Faulty component is bypassed short circuit by the shunting device for crossing trouble unit, is enabled entire frequency converter not shut down the operation of drop volume, is ensured not
Safety accident or economic loss can be caused due to frequency converter shutdown.
In use, there are several disadvantages for the bypass module of cascade connection type frequency converter in the prior art: 1) design is complicated,
At high cost and volume is big；2) it is unable to the state of automatic feedback bypass contactor；3) being unable to the movement of automatic feedback bypass contactor is
No success；4) the fiber optic communication failure being unable between the master control system and bypass module of automatic feedback frequency converter；So that power list
The inefficiency of first shunting device reduces the stability and reliability of frequency converter.
Summary of the invention
In view of the deficiencies in the prior art, present invention solves the technical problem that are as follows: how to improve existing power cell
The working efficiency of shunting device so that the bypass module of high voltage transducer power unit have structure simple and high reliablity it is excellent
Point.
To achieve the above objectives, a kind of bypass module for high voltage transducer power unit provided by the invention, including
The bypass driving circuit that bypass contactor for driving power unit switchs, the bypass module further include:
Bypass condition detection circuit, is used for: whether detection bypass contactor drives success；
Bypass failure feed circuit, is used for: the signal feedback for the bypass failure that bypass condition detection circuit is detected is supreme
The master control system of voltage frequency changer；
Communication failure feed circuit, is used for: the signal of bypass fibers communication failure is timely feedbacked to the master control of frequency converter
System.
Based on the above technical solution, the bypass driving circuit includes:
Signal input interface is used for: receiving the voltage signal of master control system；
First filter circuit, is used for: being filtered to the voltage signal of input interface；
The first transistor circuit, is used for: the by-passing signal switched according to filtered signal output driving bypass contactor；
Signal output interface is used for: by-passing signal is exported to bypass contactor；
First signal circuit, is used for: whether the by-passing signal of display the first transistor circuit exports；
Tank circuit is used for: in the moment of the first transistor circuit output by-passing signal, discharging the electric energy of storage.
Based on the above technical solution, the first transistor circuit includes resistance R1, relay KA and NPN type three
It is connect after the pole the b series resistance R1 of pole pipe Q1, triode Q1 with signal input interface, the pole the e ground connection of triode Q1, triode Q1
The pole b and the pole e between be parallel with the first filter circuit, the pole c of triode Q1 is connect with an input terminal of relay KA, relay
Another input terminal of device KA connects positive pole, and two input terminals of relay KA are also parallel with the first signal circuit；
The output end of the relay KA includes first switch K1 and second switch K2, the movable contact connection of first switch K1
Positive pole, the break contact of first switch K1 are connect with the anode of diode D3, the dynamic closed contact of first switch K1 and two poles
The anode connection of pipe D4, the cathode of diode D3 and the cathode of diode D4 connect with an output point of signal output interface
It connects, another output point of signal output interface is connect with the dynamic closed contact of second switch K2, and the movable contact of second switch K2 connects
Ground is connected with tank circuit between the break contact and first switch K1 of second switch K2.
Based on the above technical solution, the first transistor circuit further includes diode D1 and diode D5, and two
The anode of pole pipe D1 is connect with the pole c of triode Q1, and the cathode of diode D1 connects positive pole, the cathode of diode D5 and two
The cathode of pole pipe D3 connects, and the anode of diode D5 is connect with the dynamic closed contact of second switch K2.
Based on the above technical solution, the tank circuit includes capacitor C2, resistance R4, resistance R5 and resistance R6,
The anode of capacitor C2 is connect with the break contact of first switch K1, and resistance R4, resistance R5 and resistance R6 are in parallel, the both ends point after parallel connection
It is not connect with the break contact of the dynamic closed contact of first switch K1 and second switch K2.
Based on the above technical solution, first filter circuit includes resistance R1 and capacitor C1, resistance R1, capacitor
C1 is extremely in parallel with the pole b of triode Q1 and e respectively；
First signal circuit includes light emitting diode D2 and resistance R3, the cathode and triode Q1 of light emitting diode D2
The connection of the pole c, connect with positive pole after the cathode series resistance R3 of light emitting diode D2.
Based on the above technical solution, the bypass condition detection circuit includes:
Voltage regulator circuit is used for: stablizing the voltage signal of bypass condition detection circuit input terminal；
Second filter circuit, is used for: being filtered to the input signal after pressure stabilizing；
Second signal circuit, is used for: whether display bypass contactor drives success；
Optocoupler circuit is used for: exporting whether bypass contactor drives successful signal according to filtered signal
Third filter circuit, is used for: being filtered to the signal of optocoupler circuit output.
Based on the above technical solution, the voltage regulator circuit includes zener diode D6 and capacitor C3, capacitor C3 with
Zener diode D6 is in parallel, and the cathode of zener diode D6 is connect with the input terminal of bypass condition detection circuit, zener diode
The plus earth of D6；
The second signal circuit includes light emitting diode D7, after the cathode series resistance R7 of light emitting diode D7 with bypass
The input terminal of state detection circuit connects, the cathode ground connection of light emitting diode D7；
The optocoupler circuit includes photoelectrical coupler U, the cathode ground connection of light-emitting diode in photoelectrical coupler U,
The anode of light-emitting diode is connect with one end of current-limiting resistance R8, and the other end of current-limiting resistance R8 is as bypass condition detection circuit
Input terminal, the pole the e ground connection of phototriode in photoelectrical coupler U connects electricity after the pole the c series resistance R10 of phototriode
Source anode；
Second filter circuit includes resistance R9 and capacitor C4, and resistance R9 and capacitor C4 are connected in parallel on photoelectrical coupler U
The both ends of middle light-emitting diode；
The third filter circuit includes resistance R11 and capacitor C5, one end resistance R11 and in photoelectrical coupler U photosensitive three
The pole c of pole pipe connects, and with ground connection after resistance R11 other end series capacitance C5, the tie point of resistance R11 and capacitor C5 is as conduct
The output end of bypass condition detection circuit.
Based on the above technical solution, the bypass failure feed circuit and communication failure feed circuit include:
4th filter circuit, is used for: being filtered to the voltage signal of circuit input end；
Second transistor circuit, is used for: exporting corresponding feedback signal according to filtered signal；
Third signal circuit, is used for: whether display feedback signal exports.
Based on the above technical solution, the second transistor circuit includes resistance R12 and NPN type triode Q2,
The pole b of triode Q2 is connect with one end of resistance R12, input terminal of the other end of resistance R12 as feed circuit, triode Q2
The pole e ground connection, the pole c of triode Q2, which is sequentially connected in series after resistance R14, resistance R15, connects positive pole, and the both ends resistance R14 are in parallel
There are capacitor C6, output end of the pole c of triode Q2 as feed circuit；
4th filter circuit includes resistance R13 and capacitor C5, after capacitor C5 is in parallel with resistance R13, resistance R13 and three
The pole b of pole pipe Q2 and e are extremely in parallel；
The third signal circuit includes light emitting diode D8 and resistance R16, the cathode and triode of light emitting diode D8
The pole c of Q2 connects, and connects positive pole after the cathode series resistance R16 of light emitting diode D8.
Compared with the prior art, the advantages of the present invention are as follows:
1) using triode operation in saturation region, collector is connected with emitter, and relay is obtained electric actuation, and passes through the
One signal circuit shows that by-passing signal has issued in time, so that bypass driving circuit has structure simple, at low cost and can
The advantage high by property；
2) when relay obtains electric actuation, in the moment that first switch, second switch are closed, the electric current of bypass contactor line packet
It is bigger, it discharges the electric energy of storage in time using tank circuit, effectively prevent the reduction of supply voltage, make the work of bypass contactor
Make that voltage is more stable, to improve the stability and reliability of frequency converter；
3) judge whether bypass contactor acts success using bypass condition detection circuit, and be transmitted to MCU control in time
The signal of bypass failure is timely feedbacked to the master control system of frequency converter using bypass failure feed circuit, is conducive to master control by device
System carries out the protection work of next step, is timely feedbacked the signal of bypass fibers communication failure using communication failure feed circuit
To the master control system of frequency converter, for improving the stability and reliability of frequency converter.
Detailed description of the invention
Fig. 1 is the circuit theory schematic diagram that driving circuit is bypassed in the present invention.
Fig. 2 is the circuit theory schematic diagram of bypass condition detection circuit in the present invention.
Fig. 3 is the circuit theory schematic diagram of bypass failure (or communication failure) feed circuit in the present invention.
Specific embodiment
The embodiment of the present invention is described in further detail below in conjunction with attached drawing.
Embodiment 1: a kind of bypass module for high voltage transducer power unit, including the side for driving power unit
The bypass driving circuit of road contactor (bypass contactor is the prior art) switch, the bypass module further include:
Bypass condition detection circuit, for detecting whether bypass contactor drives success；
The signal of bypass failure feed circuit, the bypass failure for detecting bypass condition detection circuit feeds back to high pressure
The master control system of frequency converter；
Communication failure feed circuit, for timely feedbacking the signal of bypass fibers communication failure to the master control system of frequency converter
System.
In addition, the bypass module further includes DC power supply circuit, for providing low pressure for each circuit in bypass module
DC power supply, such as :+48V ,+24V ,+5V and/or+3.3V.
Preferably, the bypass driving circuit include signal input interface, the first filter circuit, the first transistor circuit,
Signal output interface, the first signal circuit and tank circuit.
Signal input interface, including one and MCU controller (Micro Controller Unit, micro-control unit) company
The input point BY_CTRL connect, for receiving the voltage signal of master control system.
First filter circuit is filtered for the voltage signal to input interface.
The first transistor circuit, the by-passing signal for being switched according to filtered signal output driving bypass contactor.
Signal output interface is used for including two output points BY+ and BY- connecting with bypass contactor by by-passing signal
Output is to bypass contactor, to drive the switch motion of bypass contactor, by the output terminal shortcircuit of corresponding trouble unit.
First signal circuit, for showing whether the by-passing signal of the first transistor circuit exports.
Tank circuit discharges the electric energy of its storage, effectively for the moment in the first transistor circuit output by-passing signal
The reduction of supply voltage is prevented, stablizes the operating voltage of bypass contactor, to improve the stability and reliability of frequency converter.
Preferably, shown in Figure 1, the first transistor circuit includes resistance R1, relay KA and NPN type triode
It is connect after the pole the b series resistance R1 of Q1, triode Q1 with signal input interface, the pole e of triode Q1 is grounded GND1, triode Q1
The pole b and the pole e between be parallel with the first filter circuit, rise absorb filter action, make triode Q1 reliably working in switch state；
The pole c of triode Q1 is connect with an input terminal of relay KA, and another input terminal of relay KA connection positive pole+
Two input terminals of 5V, relay KA are also parallel with the first signal circuit, can be in time when relay PLY coil obtains electric actuation
Display display by-passing signal has issued.
Shown in Figure 1, the output end of the relay KA includes first switch K1 and second switch K2, first switch K1
Movable contact 1 connect positive pole+48V, the break contact 2 of first switch K1 is connect with the positive of diode D3, first switch
The dynamic closed contact 3 of K1 is connect with the anode of diode D4, and the cathode of diode D3 and the cathode of diode D4 are exported with signal
One output point BY+ connection of interface, for preventing the mutation in voltage and current direction in circuit, signal output interface another
Output point BY- is connect with the dynamic closed contact 6 of second switch K2, and the movable contact 4 of second switch K2 is grounded GND2, second switch K2's
Tank circuit is connected between break contact 5 and first switch K1.
When the coil of relay KA obtains electric actuation, the normally closed point disconnection of first switch K1 and second switch K2, opened point
Closure bypasses an output point BY+ connection positive pole+48V of signal output interface in driving circuit, signal output interface
Another output point BY- is grounded GND2, to drive bypass contactor to act, by the output terminal shortcircuit of corresponding trouble unit.
Preferably, shown in Figure 1, the first transistor circuit further includes sustained diode 1 and freewheeling diode
The anode of D5, sustained diode 1 are connect with the pole c of triode Q1, and the cathode of sustained diode 1 connects positive pole+5V, are continued
Stream diode D1 can be formed by multiple diodes in parallel, for relay KA shutdown when release relay KA coil energy,
It avoids damaging the first transistor circuit；The cathode of sustained diode 5 is connect with the cathode of diode D3, two pole of afterflow
The anode of pipe D5 is connect with the dynamic closed contact 6 of second switch K2, and sustained diode 5 can also be formed by multiple diodes in parallel, is used
In the energy for discharging bypass contactor coil when bypass contactor turns off, avoid damaging the first transistor circuit.
Preferably, shown in Figure 1, the tank circuit includes capacitor C2, resistance R4, resistance R5 and resistance R6, capacitor
The anode of C2 connect with the break contact of first switch K1, resistance R4, resistance R5 and resistance R6 parallel connection, the both ends after parallel connection respectively with
The dynamic closed contact of first switch K1 is connected with the break contact of second switch K2.It is closed in first switch K1 and second switch K2
Moment, since electric current is bigger, tank circuit can discharge the electric energy of its storage in time, effectively stablize the work electricity of bypass contactor
It presses (+48V), to improve the stability and reliability of frequency converter.
Preferably, shown in Figure 1, first filter circuit includes resistance R1 and capacitor C1, and resistance R1, capacitor C1 are equal
It is extremely in parallel with the pole b of triode Q1 and e respectively.When bypass driving circuit receives input voltage, capacitor C1 in parallel is certainly
Dynamic charging, in the capacitor by part energy storage；When input voltage reduces, capacitor C1 both end voltage is with exponential law
Electric discharge, releases the energy of storage, so that the voltage between the pole b and the pole e of triode Q1 is more stable, plays flat wave and makees
With to make triode Q1 reliably working in switch state.
First signal circuit includes light emitting diode D2 and resistance R3, the cathode and triode Q1 of light emitting diode D2
The connection of the pole c, positive pole+5V is connected after the cathode series resistance R3 of light emitting diode D2.When bypass driving circuit receives
Voltage signal when, so that triode Q1 is in saturation conduction state, the cathode of light emitting diode D2 is grounded by triode Q1
GND1, carried out using light emitting diode D2 it is luminous, display by-passing signal issued.
Preferably, the bypass condition detection circuit includes:
Voltage regulator circuit, for stablizing the voltage signal of bypass condition detection circuit input terminal；
Second filter circuit, for being filtered to the input signal after pressure stabilizing；
Second signal circuit, for showing whether bypass contactor drives success；
Optocoupler circuit, for exporting whether bypass contactor drives successful signal according to filtered signal
Third filter circuit, for being filtered to the signal that optocoupler circuit exports.
Preferably, shown in Figure 2, the voltage regulator circuit includes zener diode D6 and capacitor C3, capacitor C3 and pressure stabilizing
Diode D6 is in parallel, and the cathode of zener diode D6 is connect with the input terminal of bypass condition detection circuit, zener diode D6's
Plus earth GND2.
When the input terminal BY_OPEN- of bypass condition detection circuit receives input voltage, it is connected in parallel on zener diode D6
The capacitor C3 automatic charging at both ends, in the capacitor by part energy storage；When input voltage reduces, C3, capacitor are deposited
The energy of storage releases, so that the voltage of bypass condition detection circuit input terminal is more stable, plays the role of voltage regulation filtering, makes light
Electric coupler U reliably working is in switch state, to improve the stability and reliability of frequency converter.
Shown in Figure 2, the second signal circuit includes light emitting diode D7, the positive series electrical of light emitting diode D7
It is connect after resistance R7 with the input terminal BY_OPEN- of bypass condition detection circuit, the cathode of light emitting diode D7 is grounded GND2.
When bypass contactor acts successfully, the input terminal BY_OPEN- connection+48V of bypass condition detection circuit works electric
Source, second signal circuit communication, carried out using light emitting diode D7 it is luminous, display feedback bypass contactor acted success.
Shown in Figure 2, the optocoupler circuit includes photoelectrical coupler U, light-emitting diode in photoelectrical coupler U
Cathode be grounded GND2, light-emitting diode anode connect with one end of current-limiting resistance R8, the other end conduct of current-limiting resistance R8
The pole the e ground connection GND1 of phototriode in the input terminal BY_OPEN- of bypass condition detection circuit, photoelectrical coupler U, photosensitive three
Positive pole+3.3V is connected after the pole the c series resistance R10 of pole pipe.
Shown in Figure 2, second filter circuit includes resistance R9 and capacitor C4, and resistance R9 and capacitor C4 are connected in parallel on
The both ends of light-emitting diode in photoelectrical coupler U.Resistance R8 and resistance R9 constitutes pressure divider circuit, and guarantee is added in optocoupler diode two
The voltage at end is connected in parallel on the capacitor at the both ends resistance R9 when input terminal BY_OPEN- receives input voltage in safety zone
C4 automatic charging, in the capacitor by part energy storage；When input voltage reduces, capacitor C4 releases the energy of storage
It releases, so that the voltage at optocoupler diode both ends is more stable, to play the role of flat wave, makes the reliable work of photoelectrical coupler U
Make in switch state.
Shown in Figure 2, the third filter circuit includes resistance R11 and capacitor C5, the one end resistance R11 and photoelectric coupling
The pole the c connection of phototriode in device U, after resistance R11 other end series capacitance C5 with ground connection GND1, resistance R11 and capacitor C5
Tie point as the output end BY_STATE as bypass condition detection circuit.
When bypass contactor acts successfully, the input terminal BY_OPEN- connection+48V of bypass condition detection circuit works electric
Source is shone by light-emitting diode in photoelectrical coupler U, so that the pole c and the pole e of phototriode are connected in photoelectrical coupler U,
The output end BY_STATE of bypass condition detection circuit is grounded, and logic low is transmitted to MCU controller, to determine in time
Bypass contactor acts successfully.
Preferably, the bypass failure feed circuit and communication failure feed circuit include:
4th filter circuit, is used for: being filtered to the voltage signal of circuit input end；
Second transistor circuit, is used for: exporting corresponding feedback signal according to filtered signal；
Third signal circuit, is used for: whether display feedback signal exports.
Preferably, shown in Figure 3, the second transistor circuit includes biasing resistor R12 and NPN type triode Q2,
The pole b of triode Q2 is connect with one end of biasing resistor R12, input terminal of the other end of biasing resistor R12 as feed circuit
(input terminal of bypass failure feed circuit is BY_FAULT_CTRL, the input terminal of communication failure feed circuit is BYFiber_
ERR_CTRL), the pole e of triode Q2 is grounded GND1, and the pole c of triode Q2 connects electricity after being sequentially connected in series resistance R14, resistance R15
The both ends source anode+5V, resistance R14 are parallel with capacitor C6, output end (bypass failure of the pole c of triode Q2 as feed circuit
The output end of feed circuit is BY_FAULT-, the output end of communication failure feed circuit is BYFiber_ERR-)；
In bypass contactor baulk, the input terminal BY_FAULT- of bypass failure feed circuit can receive bypass
The control signal of failure makes triode Q2 work in saturation region, the pole the c reverse bias of triode Q2, c by biasing resistor R12
Pole is connected with the pole e, so that the output end BY_FAULT- of bypass failure feed circuit has become logic low and (become from+5V
0V), the signal by bypass failure is transmitted to the master control system of frequency converter, to improve the stability and reliability of frequency converter.
When fiber optic communication between Bypass Control plate and the master control system of frequency converter is broken down, transmission by-pass will be unable to
Signal needs to allow the master control system of frequency converter to know.It, can be to master when Bypass Control plate MCU determines bypass fibers communication failure
Control system issues communication failure signal.The input terminal BYFiber_ERR_CTRL of communication failure feed circuit receives communication failure
Voltage signal, by biasing resistor R12 make triode Q2 work in saturation region, the pole the c reverse bias of triode Q2, the pole c and e
Pole conducting, so that the output end BYFiber_ERR- of bypass failure feed circuit has become logic low (becoming 0V from+5V),
The signal of communication failure is transmitted to the master control system of frequency converter, to improve the stability and reliability of frequency converter.
Shown in Figure 3, the 4th filter circuit includes resistance R13 and capacitor C5, and capacitor C5 is in parallel with resistance R13,
The both ends resistance R13 are connect with the pole b of triode Q2 and the pole e respectively.Biasing resistor R12 and resistance R13 constitutes pressure divider circuit, when defeated
When entering termination and receiving voltage signal, it is connected in parallel on the capacitor C5 automatic charging at the both ends resistance R13, part energy is stored in electricity
In container；Voltage signal reduce when, capacitor C5 releases the energy of storage, stablize triode Q2 the pole e and the pole b it
Between voltage make triode Q2 reliably working in switch state to play the role of flat wave.
Shown in Figure 3, the third signal circuit includes light emitting diode D8 and resistance R16, light emitting diode D8's
Cathode is connect with the pole c of triode Q2, and positive pole+5V is connected after the cathode series resistance R16 of light emitting diode D8.When three poles
When pipe Q2 is in a saturated state, the cathode of light emitting diode D8 is grounded GND1, the connection of third signal circuit, benefit by triode Q2
Carried out with light emitting diode D8 luminous, display bypass failure or the feedback signal of communication failure have issued.
The present invention is not only limited to above-mentioned preferred forms, anyone can show that other are each under the inspiration of the present invention
The product of kind form, however, make any variation in its shape or structure, it is all with identical or similar with the present invention
Technical solution, within its protection scope.The content being not described in detail in this specification belongs to this field professional technique people
The prior art well known to member.
Claims (10)
1. a kind of bypass module for high voltage transducer power unit, including being opened for the bypass contactor of driving power unit
The bypass driving circuit of pass, it is characterised in that: the bypass module further include:
Bypass condition detection circuit, is used for: whether detection bypass contactor drives success；
Bypass failure feed circuit, is used for: the signal for the bypass failure that bypass condition detection circuit detects is fed back to high voltage variable
The master control system of frequency device；
Communication failure feed circuit, is used for: the signal of bypass fibers communication failure is timely feedbacked to the master control system of frequency converter.
2. being used for the bypass module of high voltage transducer power unit as described in claim 1, it is characterised in that: the bypass is driven
Dynamic circuit includes:
Signal input interface is used for: receiving the voltage signal of master control system；
First filter circuit, is used for: being filtered to the voltage signal of input interface；
The first transistor circuit, is used for: the by-passing signal switched according to filtered signal output driving bypass contactor；
Signal output interface is used for: by-passing signal is exported to bypass contactor；
First signal circuit, is used for: whether the by-passing signal of display the first transistor circuit exports；
Tank circuit is used for: in the moment of the first transistor circuit output by-passing signal, discharging the electric energy of storage.
3. being used for the bypass module of high voltage transducer power unit as claimed in claim 2, it is characterised in that: described first is brilliant
Body pipe circuit includes resistance R1, relay KA and NPN type triode Q1, defeated with signal after the pole the b series resistance R1 of triode Q1
Incoming interface connection, the pole the e ground connection of triode Q1, is parallel with the first filter circuit, triode between the pole b and the pole e of triode Q1
The pole c of Q1 is connect with an input terminal of relay KA, and another input terminal of relay KA connects positive pole, relay KA
Two input terminals be also parallel with the first signal circuit；
The output end of the relay KA includes first switch K1 and second switch K2, and the movable contact of first switch K1 connects power supply
Anode, the break contact of first switch K1 are connect with the anode of diode D3, the dynamic closed contact and diode D4 of first switch K1
Anode connection, the cathode of diode D3 and the cathode of diode D4 connect with an output point of signal output interface, letter
Number another output point of output interface is connect with the dynamic closed contact of second switch K2, the movable contact ground connection of second switch K2, the
Tank circuit is connected between the break contact and first switch K1 of two switch K2.
4. being used for the bypass module of high voltage transducer power unit as claimed in claim 3, it is characterised in that: described first is brilliant
Body pipe circuit further includes diode D1 and diode D5, and the anode of diode D1 is connect with the pole c of triode Q1, diode D1's
Cathode connects positive pole, and the cathode of diode D5 is connect with the cathode of diode D3, the anode and second switch of diode D5
The dynamic closed contact of K2 connects.
5. being used for the bypass module of high voltage transducer power unit as claimed in claim 3, it is characterised in that: the energy storage is returned
Road includes capacitor C2, resistance R4, resistance R5 and resistance R6, and the anode of capacitor C2 connect with the break contact of first switch K1, hinders
R4, resistance R5 and resistance R6 are in parallel, it is in parallel after both ends it is dynamic with the dynamic closed contact of first switch K1 and second switch K2 respectively
Disconnected contact connection.
6. being used for the bypass module of high voltage transducer power unit as claimed in claim 3, it is characterised in that: first filter
Wave circuit includes resistance R1 and capacitor C1, and resistance R1, capacitor C1 are extremely in parallel with the pole b of triode Q1 and e respectively；
First signal circuit includes light emitting diode D2 and resistance R3, the c of the cathode and triode Q1 of light emitting diode D2
Pole connects, and connect after the cathode series resistance R3 of light emitting diode D2 with positive pole.
7. being used for the bypass module of high voltage transducer power unit as described in claim 1, it is characterised in that: the bypass shape
State detection circuit includes:
Voltage regulator circuit is used for: stablizing the voltage signal of bypass condition detection circuit input terminal；
Second filter circuit, is used for: being filtered to the input signal after pressure stabilizing；
Second signal circuit, is used for: whether display bypass contactor drives success；
Optocoupler circuit is used for: exporting whether bypass contactor drives successful signal according to filtered signal
Third filter circuit, is used for: being filtered to the signal of optocoupler circuit output.
8. being used for the bypass module of high voltage transducer power unit as claimed in claim 7, it is characterised in that: the pressure stabilizing electricity
Road includes zener diode D6 and capacitor C3, and capacitor C3 is in parallel with zener diode D6, the cathode of zener diode D6 and bypass
The input terminal of state detection circuit connects, the plus earth of zener diode D6；
The second signal circuit includes light emitting diode D7, after the cathode series resistance R7 of light emitting diode D7 with bypass condition
The input terminal of detection circuit connects, the cathode ground connection of light emitting diode D7；
The optocoupler circuit includes photoelectrical coupler U, and the cathode ground connection of light-emitting diode, shines in photoelectrical coupler U
The anode of diode is connect with one end of current-limiting resistance R8, and the other end of current-limiting resistance R8 is as the defeated of bypass condition detection circuit
Enter end, the pole e of phototriode is grounded in photoelectrical coupler U, is connecting power supply just after the pole the c series resistance R10 of phototriode
Pole；
Second filter circuit includes resistance R9 and capacitor C4, and resistance R9 and capacitor C4, which are connected in parallel in photoelectrical coupler U, to be sent out
The both ends of near-infrafed photodiodes；
The third filter circuit includes resistance R11 and capacitor C5, phototriode in the one end resistance R11 and photoelectrical coupler U
The connection of the pole c, with ground connection after resistance R11 other end series capacitance C5, the tie point of resistance R11 and capacitor C5 is used as bypass
The output end of state detection circuit.
9. being used for the bypass module of high voltage transducer power unit as described in claim 1, it is characterised in that: the bypass is lost
It loses feed circuit and communication failure feed circuit includes:
4th filter circuit, is used for: being filtered to the voltage signal of circuit input end；
Second transistor circuit, is used for: exporting corresponding feedback signal according to filtered signal；
Third signal circuit, is used for: whether display feedback signal exports.
10. being used for the bypass module of high voltage transducer power unit as claimed in claim 9, it is characterised in that: described second
Transistor circuit includes resistance R12 and NPN type triode Q2, and the pole b of triode Q2 is connect with one end of resistance R12, resistance R12
Input terminal of the other end as feed circuit, the pole the e ground connection of triode Q2, the pole c of triode Q2 be sequentially connected in series resistance R14,
Positive pole is connected after resistance R15, the both ends resistance R14 are parallel with capacitor C6, output of the pole c of triode Q2 as feed circuit
End；
4th filter circuit includes resistance R13 and capacitor C5, after capacitor C5 is in parallel with resistance R13, resistance R13 and triode
The pole b of Q2 and e are extremely in parallel；
The third signal circuit includes light emitting diode D8 and resistance R16, the c of the cathode and triode Q2 of light emitting diode D8
Pole connects, and connects positive pole after the cathode series resistance R16 of light emitting diode D8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811253138.7A CN109347313B (en) | 2018-10-25 | 2018-10-25 | Bypass module for power unit of high-voltage frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811253138.7A CN109347313B (en) | 2018-10-25 | 2018-10-25 | Bypass module for power unit of high-voltage frequency converter |
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| CN109347313A true CN109347313A (en) | 2019-02-15 |
| CN109347313B CN109347313B (en) | 2020-08-04 |
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| CN201811253138.7A Active CN109347313B (en) | 2018-10-25 | 2018-10-25 | Bypass module for power unit of high-voltage frequency converter |
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| CN111970793A (en) * | 2020-07-28 | 2020-11-20 | 杭州士兰微电子股份有限公司 | LED drive circuit, control method thereof and LED drive device |
| CN112649753A (en) * | 2020-12-16 | 2021-04-13 | 儒竞艾默生环境优化技术（上海）有限公司 | Power module fault monitoring system and method and frequency converter |
| CN114356021A (en) * | 2021-12-22 | 2022-04-15 | 中国电子科技集团公司第十八研究所 | MPPT series regulator bypass device |
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|---|---|
| CN109347313B (en) | 2020-08-04 |
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