CN207184326U - A kind of high-power soft switchs chopper circuit - Google Patents
A kind of high-power soft switchs chopper circuit Download PDFInfo
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- CN207184326U CN207184326U CN201720551080.9U CN201720551080U CN207184326U CN 207184326 U CN207184326 U CN 207184326U CN 201720551080 U CN201720551080 U CN 201720551080U CN 207184326 U CN207184326 U CN 207184326U
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Abstract
It the utility model is related to induction heating power field, a kind of disclosed high-power soft switch chopper circuit, including Sofe Switch copped wave module, transformer T1, high-frequency rectification semiconductor devices D7, D8, D9, D10, reactor L2, capacitor C3, it is electrically connected to form by Sofe Switch copped wave module by transformer T1, with reactor L2, capacitor C3, bridge circuit is made up of high-frequency rectification semiconductor devices D7, D8, D9, D10；Described Sofe Switch copped wave module is electrically connected to form by three-phase rectifier by reactor L1, D.C. contactor KM1, capacitor C1 and resonance H bridges, the utility model improves grid side power factor, reduce the pollution to power network, Sofe Switch chopper circuit, the loss of power device switching process greatly reduces, perfect condition is almost nil, can increase power supply capacity by the way that multiple Sofe Switch copped wave wired in parallel, transformer are exported into the various ways such as series, parallel operation.
Description
Technical field
Induction heating power field is the utility model is related to, more particularly to a kind of high-power induction heating power Sofe Switch is cut
Wave circuit.
Background technology
Induction heating power is according to electromagnetic induction principle and joule-Lenz's theorem, is heated using vortex, heating
Speed is fast, efficiency high, and automation journey is high, energy-conserving and environment-protective.The development of induction heating power technology and the hair of power semiconductor
Open up closely related, with the high capacity of power device, high frequency, and then driven the high capacity and height of induction heating power
Frequencyization.
At present, the regulation of Parallel Resonant induction heating power power output is mainly by adjusting DC voltage come real
Existing, DC side Power Regulation mainly has the Power Regulation of Thyristor Controlled rectifying and pressure-regulating and the major class of DC chopped-wave voltage-regulating Power Regulation two.
Thyristor Controlled commutation technique refers to the angle of flow by adjusting IGCT, makes its output voltage values continuously adjustabe,
The power adjusting of system is realized, in induction heating system, typically uses three-phase bridge phase control rectifier circuit.This Power Regulation mode
Comparative maturity, cost are relatively low.But Thyristor Controlled regulator rectifier circuit is in the case where pilot angle is larger, input work
Rate factor is very low, and input current waveform is spike, and harmonic content is very high, and larger pollution is formd to power network.It is and brilliant
The EMI of brake tube regulator rectifier circuit is very big, and the electrical equipment and the control circuit of itself to periphery will produce larger interference.
DC chopped-wave voltage-regulating Power Regulation refers to use buck circuit in dc bus side, by the size for changing dutycycle
To adjust VD, the regulation to power output is realized.The main circuit of the Power Regulation mode is uncontrollable whole using diode
Current circuit, compared with Thyristor Controlled rectification circuit and improve grid side power factor, reduce the pollution to power network.But
Switching on and off for device for power switching in Buck circuits belongs to hard switching, exist in switching process, on device voltage and
The current superimposition time, switching loss is bigger, so being unsuitable for applying in high frequency and hicap.
The content of the invention
Direction with induction heating power towards high frequency and high capacity is developed, and is adjusted to give full play to direct current voltage reulation
The advantages of work(circuit, while overcome its shortcoming, the utility model discloses a kind of high-power soft switch chopper circuit.
The utility model is that technical scheme is used by solving the above problems：
A kind of high-power soft switchs chopper circuit, including Sofe Switch copped wave module, transformer T1, high-frequency rectification semiconductor device
Part D7, D8, D9, D10, reactor L2, capacitor C3, transformer T1 and reactor L2, electric capacity are passed through by Sofe Switch copped wave module
Device C3 is electrically connected to form, and bridge circuit is made up of high-frequency rectification semiconductor devices D7, D8, D9, D10；
Described Sofe Switch copped wave module by three-phase rectifier by reactor L1, D.C. contactor KM1, capacitor C1 with
Resonance H bridges are electrically connected to form, and the resonance H bridges are by metal-oxide-semiconductor Q1, Q2, Q3, Q4, rectifying tube DQ1, DQ2, DQ3, DQ4, electric capacity
CQ1, CQ2, Cb and transformer T1 compositions, one metal-oxide-semiconductor Q1 output end of route pass through rectifying tube DQ1, electric capacity CQ1 parallel connection electricity
Road, it is in series again by rectifying tube DQ2, electric capacity CQ2 parallel circuit with another metal-oxide-semiconductor Q2 output ends；Series connection point a leads to
Cross electric capacity Cb, the output end that transformer leakage inductance L1k is electrically connected to form is H bridge output voltage Uinv one end；Another way is by a MOS
Pipe Q3 output ends are gone here and there again by rectifying tube DQ3 series circuits with a metal-oxide-semiconductor Q4 output end by rectifying tube DQ4 series circuits
Connection is formed；Series connection point b output end is the H bridge output voltage Uinv other ends；Form full-bridge soft-switching copped wave module；It is wherein electric
Container C1 both ends are connected with Hall voltage sensor CHV1, and Hall electricity is connected between D.C. contactor KM1 and capacitor C1
Flow sensor CHK1.
A kind of high-power chopping switch circuit, described metal-oxide-semiconductor Q1, Q2, Q3, Q4 or replaces with IGCT, IGBT；Wherein
Q1 grid source drives signal connection G1, E1, Q2 grid source drives signal connection G2, E2, Q3 grid source drives signal connection G3,
E3, Q4 grid source drive signal connect G4, E4.
A kind of high-power soft switchs chopper circuit, and described Hall voltage sensor power end CHV1 15V+, 15V- connect
Meet external power source+15V, -15V；Sampling end DCVP, DCVN are sampling and outputting voltage signal.
A kind of high-power soft switchs chopper circuit, and several described Sofe Switch copped wave modules electrically connect composition with transformer
Sofe Switch chopper circuit, transformer therein includes：Single transformer primary Multiple coil secondary simplex winding exports, multiple transformations
The series connection output of device secondary windings, multiple transformer secondary output winding parallel outputs.
The first by several Sofe Switch copped wave modules output end respectively with single secondary simplex winding, primary Multiple coil
Primary Multiple coil corresponding to transformer, which is connected, to be formed；
Second of output end by several Sofe Switch copped wave modules respectively with multiple one to one winding transformer secondary around
Armature winding corresponding to the transformer of group series connection, which is connected, to be formed；
The third by several Sofe Switch copped wave modules output end respectively with multiple one to one winding transformer secondary around
Armature winding corresponding to group transformer in parallel, which is connected, to be formed.
The beneficial effects of the utility model are to improve grid side power factor, reduce the pollution to power network, Sofe Switch
Chopper circuit, the loss of power device switching process greatly reduce, and perfect condition is almost nil, can be by by multiple Sofe Switch copped waves
The various ways increase power supply capacitys such as wired in parallel, transformer output series, parallel operation.
Brief description of the drawings
Fig. 1 is the schematic diagram of Sofe Switch copped wave module.
Fig. 2 is single Sofe Switch chopper circuit, single output primary simplex winding, secondary simplex winding output principle
Figure.
Fig. 3 is that multiple Sofe Switch chopper circuits are in parallel, and multiple output primary Multiple coils, the output of secondary simplex winding are former
Reason figure.
Fig. 4 is that multiple Sofe Switch chopper circuits are in parallel, multiple output transformer secondary output windings in series output principle figures.
Fig. 5 is that multiple Sofe Switch chopper circuits are in parallel, multiple output transformer secondary output winding parallel output principle figures.
Fig. 6 is key node oscillogram.
Embodiment
As shown in Fig. 1,2,3,4,5,6, a kind of high-power soft switchs chopper circuit, including Sofe Switch copped wave module, transformation
Device T1, high-frequency rectification semiconductor devices D7, D8, D9, D10, reactor L2, capacitor C3, change is passed through by Sofe Switch copped wave module
Depressor T1, it is electrically connected to form with reactor L2, capacitor C3, bridge circuit is by high-frequency rectification semiconductor devices D7, D8, D9, D10
Composition；
Described Sofe Switch copped wave module by three-phase rectifier by reactor L1, D.C. contactor KM1, capacitor C1 with
Resonance H bridges are electrically connected to form, and the resonance H bridges are by metal-oxide-semiconductor Q1, Q2, Q3, Q4, rectifying tube DQ1, DQ2, DQ3, DQ4, electric capacity
CQ1, CQ2, Cb and transformer T1 compositions, one metal-oxide-semiconductor Q1 output end of route pass through rectifying tube DQ1, electric capacity CQ1 parallel connection electricity
Road, it is in series again by rectifying tube DQ2, electric capacity CQ2 parallel circuit with another metal-oxide-semiconductor Q2 output ends；Series connection point a leads to
Cross electric capacity Cb, the output end that transformer leakage inductance L1k is electrically connected to form is H bridge output voltage Uinv one end；Another way is by a MOS
Pipe Q3 output ends are gone here and there again by rectifying tube DQ3 series circuits with a metal-oxide-semiconductor Q4 output end by rectifying tube DQ4 series circuits
Connection is formed；Series connection point b output end is the H bridge output voltage Uinv other ends；Form full-bridge soft-switching copped wave module；It is wherein electric
Container C1 both ends are connected with Hall voltage sensor CHV1, and Hall electricity is connected between D.C. contactor KM1 and capacitor C1
Flow sensor CHK1.
In Fig. 1, the three-phase uncontrollable rectifier circuit of commutation diode D1, D2, D3, D4 compositions, by power frequency three-phase alternating current
It is changed into the direct current of pulsation, the secondary value of DC pulse after reactor L1 limitation rectifications, so that it becomes smooth direct current.During startup, directly
Flow contactor and form soft start loop with capacitor C1, resonance H bridge DC bus-bar voltages Ud1 slowly rises, and reduces start-up course
In rush of current.
When switching tube Q1, Q4 or Q2, Q3 are simultaneously turned on, transformer primary side provides energy to load.By phase shifting control,
Do not turn off Q4 at once when turning off Q1, but phase shifting angle is determined according to output feedback signal, turned off again after certain time
Q4, before Q1 is turned off, because Q1 is turned on, voltage is equal to Q1 conduction voltage drop on its shunt capacitance CQ1, ideally its value
It is zero, when the shut-off Q1 moment, CQ1 is started to charge up, and because capacitance voltage can not be mutated, therefore, Q1 is zero voltage turn-off.Due to
Transformer leakage inductance L1k and secondary rectifying and wave-filtering inductance effect, after Q1 shut-offs, primary current can not be mutated, and continue to fill to Cb
Electricity, while CQ2 discharges also by primary side, after CQ2 voltages drop to zero, DQ2 is turned on naturally, at this moment opens Q2, then Q2 is zero
Voltage is open-minded.When CQ1 is fully charged, CQ2 discharge offs after, due to DQ2 be conducting, be now added in transformer primary side winding and leakage
Voltage in sense is blocking capacitor Cb both end voltages, and primary current starts to reduce, but continues to charge to Cb, until primary current is
Zero, at this moment because DQ4 blocking effect, electric capacity Cb can not be discharged by Q2, Q4, DQ4, Cb both end voltages remain unchanged,
At this moment it is zero to flow through Q4 electric currents, and shut-off Q4 is zero-current switching.
Q1, Q2, Q3, Q4, DQ1, DQ2, DQ3, DQ4, CQ1, CQ2, Cb and transformer T1 compositions full-bridge soft-switching copped wave
Module, loss when switching tube turns on and off is greatly reduced, the efficiency of the Sofe Switch chopper is improved from face.This is soft to open
Close copped wave module and H bridge output voltage Uinv are adjusted by phase-shift voltage regulating mode, transformer secondary is not by controlling full-bridge rectification, LC is filtered
Wave circuit, the controllable DC voltage Ud2 of output smoothing.G1, E1 connect Q1 grid source drive signals, and G2, E2 connect Q2 grid source drives
Signal, G3, E3 connect Q3 grid source drive signals, and G4, E4 connect Q4 grid source drive signals.
In fig. 2, single Sofe Switch copped wave module is connected on single transformer armature winding, secondary simplex winding output, often
Individual Sofe Switch copped wave module embodiment is identical with described in Fig. 1.
In figure 3, multiple Sofe Switch copped wave modules are connected on the multiple armature windings of single transformer respectively, secondary simplex winding
Output, each Sofe Switch copped wave module embodiment are identical with described in Fig. 1.
In Fig. 4, multiple Sofe Switch copped wave wired in parallel, multiple output transformer secondary output windings in series outputs are each soft
It is identical with described in Fig. 1 to switch copped wave module embodiment.
In Figure 5, multiple Sofe Switch copped wave wired in parallel, multiple output transformer secondary output winding parallel outputs are each soft
It is identical with described in Fig. 1 to switch copped wave module embodiment.
In figure 6, Uab represents the voltage between 2 points of a, b in Fig. 1, and Ucb is the voltage on blocking capacitor Ub, Ip Fig. 2
Transformer T1 primary currents, Urect are the voltage after transformer T1 secondary rectifications.
Above-mentioned T1, T2, T3, T4 model power scr MTC500Y12；U1A, U1B, U2A, U2B model are monostable
State trigger CD4098, U3 model CD4001, U4 model CD4081, U5 model CD4071, U6 model CD4011；On
Stating model can also use function identical to substitute model, belong to same innovation and creation.
Claims (4)
1. a kind of high-power soft switchs chopper circuit, it is characterized in that：Including Sofe Switch copped wave module, transformer T1, high-frequency rectification
Semiconductor devices D7, D8, D9, D10, reactor L2, capacitor C3, transformer T1 and reactance are passed through by Sofe Switch copped wave module
Device L2, capacitor C3 are electrically connected to form, and bridge circuit is made up of high-frequency rectification semiconductor devices D7, D8, D9, D10；
Described Sofe Switch copped wave module passes through reactor L1, D.C. contactor KM1, capacitor C1 and resonance by three-phase rectifier
H bridges are electrically connected to form, the resonance H bridges by metal-oxide-semiconductor Q1, Q2, Q3, Q4, rectifying tube DQ1, DQ2, DQ3, DQ4, electric capacity CQ1,
CQ2, Cb and transformer T1 compositions, one metal-oxide-semiconductor Q1 output end of route by rectifying tube DQ1, electric capacity CQ1 parallel circuit,
It is in series again by rectifying tube DQ2, electric capacity CQ2 parallel circuit with another metal-oxide-semiconductor Q2 output ends；Series connection point a passes through
The output end that electric capacity Cb, transformer leakage inductance L1k are electrically connected to form is H bridge output voltage Uinv one end；Another way is by a metal-oxide-semiconductor
Q3 output ends are connected again by rectifying tube DQ3 series circuits with a metal-oxide-semiconductor Q4 output end by rectifying tube DQ4 series circuits
Form；Series connection point b output end is the H bridge output voltage Uinv other ends；Form full-bridge soft-switching copped wave module；
Wherein capacitor C1 both ends are connected with Hall voltage sensor CHV1, connect between D.C. contactor KM1 and capacitor C1
It is connected to Hall current sensor CHK1.
2. a kind of high-power soft switch chopper circuit according to claim 1, it is characterized in that：The metal-oxide-semiconductor Q1, Q2, Q3,
Q4 replaces with IGCT, IGBT；The wherein connection of Q1 grid source drive signal G1, E1, Q2 grid source drives signal connection G2,
E2, Q3 grid source drive signal connect G3, E3, the connection of Q4 grid source drives signal G4, E4.
3. high-power soft according to claim 1 switchs chopper circuit, described Hall voltage sensor power end CHV1
15V+, 15V- meet external power source+15V, -15V；Sampling end DCVP, DCVN are sampling and outputting voltage signal, and Hall current senses
Device CHK1 15V+, 15V- meets external power source+15V, -15V；DCIP, DCIN are sampled output current signal.
A kind of 4. high-power soft switch chopper circuit according to claim 1, it is characterised in that：Described several soft are opened
The Sofe Switch chopper circuit that copped wave module electrically connects composition with transformer is closed, transformer therein includes：Single transformer is primary
Multiple coil secondary simplex winding exports, multiple transformer secondary output windings in series outputs, multiple transformer secondary output winding parallel outputs；
The first by several Sofe Switch copped wave modules the output end transformation with single secondary simplex winding, primary Multiple coil respectively
Primary Multiple coil corresponding to device, which is connected, to be formed；
Second of output end by several Sofe Switch copped wave modules respectively with multiple one to one winding transformer secondary windings strings
Armature winding corresponding to the transformer of connection, which is connected, to be formed；
The third by several Sofe Switch copped wave modules output end respectively with multiple one to one winding transformer secondary windings simultaneously
Armature winding corresponding to the transformer of connection, which is connected, to be formed.
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| CN201720551080.9U CN207184326U (en) | 2017-05-17 | 2017-05-17 | A kind of high-power soft switchs chopper circuit |
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| CN201720551080.9U CN207184326U (en) | 2017-05-17 | 2017-05-17 | A kind of high-power soft switchs chopper circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070218A (en) * | 2017-05-17 | 2017-08-18 | 洛阳科诺工业设备有限公司 | A kind of high-power soft switchs chopper circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070218A (en) * | 2017-05-17 | 2017-08-18 | 洛阳科诺工业设备有限公司 | A kind of high-power soft switchs chopper circuit |
| CN107070218B (en) * | 2017-05-17 | 2023-10-03 | 洛阳科诺工业设备有限公司 | High-power soft switch chopper circuit |
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