CN209267450U - Power converter unit - Google Patents
Power converter unit Download PDFInfo
- Publication number
- CN209267450U CN209267450U CN201790000939.5U CN201790000939U CN209267450U CN 209267450 U CN209267450 U CN 209267450U CN 201790000939 U CN201790000939 U CN 201790000939U CN 209267450 U CN209267450 U CN 209267450U
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- Prior art keywords
- power converter
- capacitor
- switch element
- voltage
- capacitive character
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Classifications
-
- 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
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/06—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
-
- 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
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of power converter unit (1), has: being cascaded the capacitive character power converter (10) and irritability power converter (20) of connection；With charging circuit (30).Capacitive character power converter (10) includes the multiple capacitors (C11, C12, C13) and multiple switch element (S11~S17) being connected in parallel relative to the terminal (101) of input direct-current voltage, charge and discharge are carried out to capacitor (C11, C12, C13) by switching with the state of switch element (S11~S17), to carry out buck to voltage.Charging circuit (30) has the switch element (S31) that will be connect or cut off with capacitive character power converter (10) to the constant-current source (31) that capacitive character power converter (10) provide constant current.
Description
Technical field
The utility model relates to the power converter units that cascade connection has 2 power converter portions.
Background technique
It is taken in general, the electric power of the capacitive character power converter of switched capacitor (also referred to as charge pump circuit) etc. provides ability
Certainly alive product is applied in driving frequency, the capacitor of capacitor and to capacitor.There is the request more than offer ability
In the case of, the output of capacitive character power converter reduces.The reduction is mainly caused by the overdischarge of capacitor.In such state
Under, at the beginning of during the charging to capacitor, generate dash current corresponding with the amount that voltage reduces.The dash current at
The reason of for noise, destroys the adverse effect such as element in addition, generating.
In patent document 1, it discloses and a kind of has for preventing to the pre-charge circuit of the dash current of capacitor
Capacitive character power converter.The pre-charge circuit recorded in patent document 1 has the switch element and electricity connecting with each capacitor
Resistance.Also, by by switching elements ON, to prevent the dash current to capacitor.
Citation
Patent document
Patent document 1: No. 8503203 specification of U.S. patent Nos
Utility model content
The utility model project to be solved
The pre-charge circuit recorded in patent document 1 determines the charging time of capacitor according to the size of resistance.Therefore,
In the higher situation of supply voltage, if in order to prevent dash current and increase resistance value, to the precharge of capacitor need
Time.It on the other hand,, cannot in the higher situation of supply voltage if reducing resistance value in order to accelerate precharge time
Prevent dash current.
Therefore, the purpose of the utility model is to provide it is a kind of when not needed between in the case where can prevent impact electricity
The power converter unit of the safety of stream.
Means for solving the problems
Power converter unit involved in the utility model is characterized in that having: capacitive character power converter, tool
There are the input unit of input direct-current voltage, the output section for exporting DC voltage, the multiple electricity being connected in parallel relative to the input unit
Container, multiple capacitive character sides switch element and the capacitive character side for carrying out switch control to the multiple capacitive character side switch element are controlled
Portion processed is switched over by the state to the multiple capacitive character side switch element to carry out charge and discharge to the multiple capacitor
Electricity, to carry out buck to voltage；Irritability power converter is connected to the input unit or the output section, tool
There are inductor, irritability side switch element and the irritability side for carrying out switch control to irritability side switch element to control
Portion is switched over by the state to irritability side switch element and carries out storage electric discharge come the energy of the opposite inductor,
To carry out buck to voltage；And charging circuit, with constant-current source, from the constant-current source to the company of the multiple capacitor
Contact provides constant current, or cutting provides.
In this configuration, it by charging circuit, is charged with capacitor of the constant current to capacitive character power converter, thus
It can prevent the dash current to capacitor.At this point, due to providing constant current to the multiple capacitors being connected in parallel, it can be right
Each capacitor charges together, and charging does not need the time.
The power converter unit can also have: voltage detection department, any electricity of opposite the multiple capacitor
The charging voltage of container is detected；And abnormality determination unit, the detected value detected to the voltage detection department and target value
It is compared, to determine exception.
In this configuration, it is compared by the charging voltage to capacitor with target value, can determine the different of capacitor
The exception of the capacitive characters power converters such as normal or switch element exception.
The abnormality determination unit can also be moved at the appointed time after the starting of the capacitive character power converter
Make.
In this configuration, the presence or absence of abnormal by determining after the just starting of power converter unit, it is abnormal existing
In the state of, continue driving power power converter cells, is able to suppress and causes a possibility that further bad.
The power converter unit can also have: power converter limiting unit is determined as in the abnormality determination unit
In the case where exception, the power converter based on the capacitive character power converter is limited.
In this configuration, in the event of an abnormality, the driving of power converter unit can be made to stop.
Utility model effect
It is charged according to the utility model by charging circuit with capacitor of the constant current to capacitive character power converter,
So as to prevent the dash current to capacitor.At this point, due to providing constant current, energy to the multiple capacitors being connected in parallel
Enough to charge together to each capacitor, charging does not need the time.
Detailed description of the invention
Fig. 1 is the block diagram of power converter unit involved in embodiment 1.
Fig. 2 is the circuit diagram of power converter unit involved in embodiment 1.
Fig. 3 (A) and Fig. 3 (B) is the figure for being illustrated to the switch control in capacitive character power converter.
The figure that movement when Fig. 4 is for precharge based on charging circuit is illustrated.
Fig. 5 is the circuit diagram of charging circuit.
Fig. 6 is the output for indicating each element of the failure determinating circuit in the normal situation of capacitive character power converter
Figure.
Fig. 7 is the output of each element of the failure determinating circuit in the case where indicating capacitive character power converter exception
Figure.
Fig. 8 is the circuit diagram of another charging circuit.
Fig. 9 is the block diagram for carrying out the breakdown determination portion of abnormal determination of capacitive character power converter.
Figure 10 is the circuit diagram of capacitive character power converter involved in embodiment 2.
The figure that movement when Figure 11 is for precharge based on charging circuit is illustrated.
Specific embodiment
Fig. 1 is the block diagram of power converter unit 1 involved in present embodiment.
Power converter unit 1 has: the input unit as made of a pair of terminal In1 and terminal In2, by terminal Out1 with
And output section made of terminal Out2.In terminal In1 and terminal In2 connection DC power supply.In terminal Out1 and terminal
Out2 connection load.Power converter unit 1 by the DC voltage V1 inputted from terminal In1 and terminal In2 (hereinafter referred to as
Input voltage V1) decompression is voltage V3 (hereinafter referred to as output voltage V3), and exports from terminal Out1 and terminal Out2.
Power converter unit 1 has: capacitive character power converter 10, irritability power converter 20, charging circuit 30,
Failure determinating circuit 40, control circuit 50.Capacitive character power converter 10 and irritability power converter 20 in terminal In1 and
Cascade connection between terminal In2 and terminal Out1 and terminal Out2, so that capacitive character power converter 10 becomes input side.
Input voltage V1 is depressured as voltage V2 (hereinafter referred to as medium voltage V2) by capacitive character power converter 10.Capacitor
Property power converter 10 be, for example, switched capacitor, capacitor charging/discharging is made by switching switch element, thus to input electricity
Pressure V1 is depressured.
Irritability power converter 20 inputs medium voltage V2, and medium voltage V2 is depressured as output voltage V3.Output
Voltage V3 is provided to the load for being connected to terminal Out1 and terminal Out2.
Charging circuit 30 has constant-current source.Charging circuit 30 is after the just starting of power converter unit 1 to progress base
During until the decompression movement of capacitive character power converter 10 and irritability power converter 20, capacitive character electric power is become
The capacitor of parallel operation 10 charges.Hereinafter, the charging referred to as " is pre-charged ".After the just starting of power converter unit 1,
The capacitor of capacitive character power converter 10 is not charged.In this state, if from being connected to terminal In1's and terminal In2
DC power supply charges to capacitor, then to each capacitor impact flow electric current, each capacitor or switch element etc. may
It is damaged.
Therefore, charging circuit 30 is after the just starting of power converter unit 1, to from being connected to terminal In1 and end
The DC power supply of sub- In2 is cut off to the electric current that capacitive character power converter 10 flows.Also, charging circuit 30 is from itself institute
The constant-current source having provides constant current to capacitive character power converter 10.If being charged with constant current to capacitor, capacitor
Charging voltage proportionally increases with the charging time.Therefore, after the just starting of power converter unit 1, pass through charging circuit
30 charge to capacitor with constant current, so as to prevent capacitor stream of the dash current to capacitive character power converter 10
Enter.As a result, it is possible to prevent the failure of capacitor.
Failure determinating circuit 40 determines the presence or absence of the failure of capacitive character power converter 10.Failure determinating circuit 40
During based on the precharge of charging circuit 30 or after precharge, to the capacitor of capacitive character power converter 10
The charging voltage of device is detected.Also, the charging voltage of 40 pairs of failure determinating circuit detections is compared with target value, to sentence
Determine the presence or absence of failure.
In addition, the short circuit for capacitor of illustrating destroys or open circuit destroys, electricity for the failure of capacitive character power converter 10
Held insufficient, formation of current path outside imagination etc..
Control circuit 50 detects input voltage V1, medium voltage V2, output voltage V3.Control circuit 50 will be intermediate
Voltage V2 and output voltage V3 are compared with respective target voltage values, according to the comparison result, are become to capacitive character electric power
20 output instruction signal of parallel operation 10 and irritability power converter.Capacitive character power converter 10 and irritability power converter
Device 20 is according to command signal, such as change driving frequency.In addition, control circuit 50 be determined as in failure determinating circuit 40 it is abnormal
In the case of, stop the driving of power converter unit.Control circuit 50 is " power converter limitation involved in the utility model
One example in portion ".
Fig. 2 is the circuit diagram of power converter unit 1 involved in present embodiment.In Fig. 2, omit shown in FIG. 1
The diagram of control circuit 50.
Capacitive character power converter 10 includes the input unit comprising terminal 101 and terminal 102, comprising terminal 103 and
The output section of terminal 104.Terminal 101 is connect with terminal In1.Terminal 102 is connect with terminal In2.Terminal 103 and aftermentioned induction
Property power converter 20 terminal 201 connect.Terminal 104 is connect with the terminal 202 of aftermentioned irritability power converter 20.
Capacitive character power converter 10 includes switch element S11, switch element S12, switch element S13, switch element
S14, switch element S15, switch element S16, switch element S17, capacitor C11, capacitor C12 and capacitor C13, switch control
Circuit 111 processed.ON-OFF control circuit 111 carries out switch control to switch element S11~S17.
ON-OFF control circuit 111 is an example of " capacitive character side control unit " involved in the utility model.In addition, opening
Close the example that element S11~S17 is " capacitive character side switch element " involved in the utility model.
Switch element S11 and switch element S12 is connected in series between terminal 101 and terminal 103.In switch element S11
With the tie point of switch element S12, capacitor C11 is sequentially connected in series with switch element S14.In terminal 103, switch element
S16, capacitor C12, switch element S15 are sequentially connected in series.Capacitor C11 and switch element S14 tie point and open
It closes between element S16 and the tie point of capacitor C12, connection switch element S13.In addition, in capacitor C12 and switch element
Between the tie point and terminal 103 of S15, connection switch element S17.Capacitor C13 be connected to terminal 103 and terminal 104 it
Between.Capacitor C11, capacitor C12 and capacitor C13 are respectively provided with identical capacitor.
Hereinafter, being illustrated to the decompression movement in capacitive character power converter 10.
Fig. 3 (A) and Fig. 3 (B) is the figure for being illustrated to the switch control in capacitive character power converter 10.?
In Fig. 3 (A) and Fig. 3 (B), the diagram of charging circuit 30 is omitted.In this example, consider capacitive character power converter 10 by 3.0V
Input voltage V1 decompression be 1.0V medium voltage V2 the case where.
ON-OFF control circuit 111 (referring to Fig. 2) is under the 1st state, as shown in Fig. 3 (A), by switch element S11, switch member
Part S13, switch element S17 are set as connecting, and switch element S12, switch element S14, switch element S15, switch element S16 are set
To disconnect.In this case, as shown in the arrow of Fig. 3 (A), become and connect capacitor C11, capacitor C12 and electricity in terminal 101
The structure of the series circuit of container C13.In this case, since input voltage V1 is 3.0V, to capacitor C11, capacitor
Device C12 and capacitor C13 charges the voltage of 1.0V respectively.
Next, ON-OFF control circuit 111 is under the 2nd state, as shown in Fig. 3 (B), by switch element S11, switch element
S13, switch element S17 are set as disconnecting, and switch element S12, switch element S14, switch element S15, switch element S16 are set as
It connects.In this case, as shown in Fig. 3 (B), become and be connected in parallel capacitor C11, capacitor C12 and electricity respectively in terminal 103
The structure of container C13.In this case, due to charging respectively the electricity of 1.0V to capacitor C11, capacitor C12 and capacitor C13
It presses, therefore exports the medium voltage V2 of 1.0V from terminal 103 and terminal 104.
In this way, in capacitive character power converter 10, pass through the 2nd of alternately the 1st state of switching Fig. 3 (A) and Fig. 3 (B) the
State, so that input voltage V1 is depressurized as medium voltage V2.
Back to Fig. 2, irritability power converter 20 includes the input unit comprising terminal 201 and terminal 202, He Bao
Output section containing terminal 203 and terminal 204.Terminal 201 is connect with the terminal 103 of capacitive character power converter 10.Terminal 202
It is connect with the terminal 104 of capacitive character power converter 10.Terminal 203 is connect with terminal Out1.Terminal 204 and terminal Out2 connect
It connects.
Irritability power converter 20 is buck converter.Irritability power converter 20 includes switch element Q11, opens
Close element Q12, inductor L1, capacitor C2, driver 21.Switch element Q11 is p-type MOS-FET.Switch element Q12 is N-shaped
MOS-FET.Driver 21 carries out switch control to switch element Q11 and switch element Q12.Irritability power converter 20 is split
It closes element Q11 and switch element Q12 and carries out on-off, medium voltage V2 is depressured as output voltage V3.
Switch element Q11 and switch element Q12 is one of " irritability side switch element " involved in the utility model
Example.Driver 21 is an example of " irritability side control unit " involved in the utility model.
In this way, input voltage V1 is depressured by capacitive character power converter 10 as medium voltage by power converter unit 1
V2.Also, medium voltage V2 is further depressured as output voltage V3 by irritability power converter 20.In other words, electric
Force transducer unit 1 is in two stages depressured voltage.If with a power converter portion, such as irritability electric power change is only passed through
Input voltage V1 is depressured and compares for the case where output voltage V3 by parallel operation 20, then capacitive character power converter 10 and irritability electricity
The respective input and output voltage difference of force transducer 20 is smaller.Therefore, it can be achieved that the power converter in power converter unit 1 is lost
Reduction.
Charging circuit 30 has constant-current source 31 and switch element S31.Constant-current source 31 is connected in series with switch element S31.
The series circuit is connected between terminal In1 and switch element S11 and the tie point of capacitor C11.Charging circuit 30 is in electricity
Switch element S31 is set as connecting when the starting of force transducer unit 1, provides constant current to capacitive character power converter 10.Capacitor
Capacitor C11, capacitor C12 and the capacitor C13 of property power converter 10 are electrically charged by the constant current.
Fig. 4 is the figure for being illustrated to movement when being pre-charged based on charging circuit 30.
In the case where being pre-charged, switch element S31 is set as connecting by charging circuit 30.In addition, capacitive character electric power
The ON-OFF control circuit 111 (referring to Fig. 2) of converter 10 is by switch element S12, switch element S14, switch element S15, switch
Element S16 is set as connecting, and switch element S11, switch element S13, switch element S17 are set as disconnecting.As a result, capacitor C11,
Capacitor C12 and capacitor C13 becomes the structure being connected in parallel relative to charging circuit 30.Stated differently, since from charging electricity
Road 30 provides constant current to the tie point for capacitor C11, capacitor C12 and the capacitor C13 being connected in parallel, therefore to capacitor
C11, capacitor C12 and capacitor C13 provide constant current simultaneously.
If capacitor C11, capacitor C12 and capacitor C13 are charged to the reference voltage as target value respectively, fill
Circuit 30 stops the charging based on constant current.In addition, capacitor C11, capacitor C12 are identical with the respective capacitor of capacitor C13.
Therefore, respectively to the identical voltage of capacitor C11, capacitor C12 and capacitor C13 charging.
Fig. 5 is the circuit diagram of charging circuit 30.In Fig. 5, by the state of the capacitive character power converter 10 when being pre-charged
Simplifying indicates.In other words, capacitive character power converter 10 by switch element S12, switch element S14, switch element S15,
Switch element S16 is set as the state connected, and switch element S11, switch element S13, switch element S17 are set as to the shape disconnected
State.
Charging circuit 30 includes constant-current source (constant-current circuit) 31, switch element S31, switch element S32, switch element
S33, comparator 32, reference voltage power supply 33.The series circuit and switch element S33 of constant-current source 31 and switch element S32 are by simultaneously
Connection connection, constitutes current mirroring circuit, and connect with terminal In1.Switch element S31 and switch element S33 is connected in series.Switch member
Part S31 is N-shaped MOS-FET, in the output of grid input comparator 32 to be switched on disconnection.
To 32 input capacitor C11 of comparator, capacitor C12 and the charging voltage of capacitor C13 testing result and come
From the reference voltage of reference voltage power supply 33 and it is compared.In addition, capacitor C11, capacitor C12 and capacitor C13's fills
Piezoelectric voltage difference is identical.It therefore, can be to capacitor C11, capacitor by being arranged in parallel bleeder circuit relative to capacitor C13
The charging voltage of device C12 and capacitor C13 are detected.In the following description, it shows as to 32 input capacitor of comparator
The testing result of the charging voltage of C13.
If the charging voltage of capacitor C13 is lower than reference voltage, comparator 32 exports the signal of H level, if capacitor
The charging voltage of C13 is higher than reference voltage, then comparator 32 exports the signal of L level.In other words, if capacitor C13's fills
Piezoelectric voltage is lower than reference voltage, then switch element S31 is connected.It is mentioned as a result, to capacitor C11, capacitor C12 and capacitor C13
For constant current, start to be pre-charged.If the charging voltage of capacitor C13 is higher than reference voltage, switch element S31 is disconnected.It is permanent as a result,
The offer for flowing to capacitor C11, capacitor C12 and capacitor C13 is cut off, and precharge terminates.
In this way, by the way that capacitor C11, capacitor C12 and capacitor C13 to be connected in parallel, constant current is provided in precharge,
So as to charge together to each capacitor.Therefore, charging does not need the time.In addition, by capacitor C11, capacitor
C12 and capacitor C13 are connected in series come in the case where being pre-charged, if a capacitor generates short trouble, to other
The voltage that capacitor applies becomes larger, other capacitors may also failure.Therefore, by by capacitor C11, capacitor C12 and electricity
Container C13 is connected in parallel, and is able to suppress the application voltage to each capacitor.Further, under normal conditions, due to capacitor
The output voltage of property power converter 10 is identical as the charging voltage of each capacitor, therefore does not need that multiple charging voltages are arranged
Detection circuit, being capable of space saving.
Failure determinating circuit 40 is after the beginning of the precharge based on charging circuit 30, to capacitive character power converter 10
Output voltage is compared with target value, to carry out the fault verification of capacitive character power converter 10.As previously mentioned, in preliminary filling
When electric, capacitor C11, capacitor C12 and capacitor C13 are connected in parallel, in addition, respective capacitor it is identical (alternatively, it is also possible to
It is different capacitor).In other words, if capacitive character power converter 10 is normal, the output electricity of capacitive character power converter 10
It presses identical as capacitor C11, capacitor C12 and the respective charging voltage of capacitor C13.Therefore, by becoming to capacitive character electric power
The output voltage of parallel operation 10 is detected, and can determine the electricity such as the exception of multiple capacitors or the exception of multiple switch element
The whole exception of capacitive power converter 10.
Known to the constant current provided from charging circuit 30.Further, since capacitor C11, the electricity of capacitive character power converter 10
The capacitor of container C12 and capacitor C13 are also design value or recommendation, therefore known.Due to capacitor charging voltage with
Charging time proportionally increases, therefore can precalculate the time until the voltage for the target value that charged to capacitor.Therefore
Hinder decision circuit 40 by from precharge after the calculated time, the output of capacitive character power converter 10 electricity
Pressure whether be target value and comprising its error in the range of, it is the presence or absence of abnormal to determine.
Hereinafter, the range determined is set as reference voltage REFL or more, reference voltage REFH range below.In addition, pre-
The output voltage of capacitive character power converter 10 when charging is expressed as VM.Output voltage VM can be by becoming in capacitive character electric power
The bleeder circuit of resistance R11 and resistance R12 is arranged to be detected in the outlet side of parallel operation 10.The partial pressure of resistance R11 and resistance R12
Circuit is an example of " voltage detection department " involved in the utility model.
Failure determinating circuit 40 has comparator 41, comparator 42 and door 43, NOT circuit 44 and door 45.Fault verification
Circuit 40 is an example of " abnormality determination unit " involved in the utility model.
The reverse phase that the detection voltage VMd of the output voltage VM of capacitive character power converter 10 is input into comparator 41 is defeated
Enter.Reference voltage REFH is input into the homophase input of comparator 41.The inspection of the output voltage VM of capacitive character power converter 10
Survey the homophase input that voltage VMd is input into comparator 42.Reference voltage REFL (< reference voltage REFH) is input into and compares
The anti-phase input of device 42.
The output signal DETH of 43 input comparator 41 of the Xiang Yumen and output signal DETL of comparator 42.NOT circuit 44
By the output signal DET reverse phase with door 43.
The output signal DETX and clock count CTR of the input NOT circuit 44 of Xiang Yumen 45.Clock count CTR is counter
The signal of 46 outputs.Counter 46 counts clock signal from the beginning of precharge, have passed through certain time
Moment exports the signal of the H level of the time of the amount of 1 clock.There are abnormal feelings in capacitive character power converter 10 with door 45
Under condition, the signal of H level is exported.With door 45 in the case where capacitive character power converter 10 does not have exception, the letter of L level is exported
Number.
In addition, the position of connecting fault decision circuit 40 can suitably change.For example, failure determinating circuit 40 can also be with
It is connected to the tie point of capacitor C11 and switch element S12 or the tie point etc. of capacitor C12 and switch element S16.
Fig. 6 is the output for indicating each element of the failure determinating circuit 40 in the normal situation of capacitive character power converter 10
Figure.
As previously mentioned, the charging voltage of capacitor proportionally increases with the charging time if providing constant current to capacitor.
Therefore, the output voltage VM of capacitive character power converter 10 also proportionally increases with the time.In this example, output voltage VM exists
When precharge has been started by time T1, become reference voltage REFL, when by time T2, becomes reference voltage REFH.
It is played since precharge and is lower than reference voltage REFL and reference voltage by time T1, output voltage VM
REFH.In this case, the output signal DETH of comparator 41 is H level, and the output signal DETL of comparator 42 is L level.
From precharge after time T1, until by time T2, output voltage VM is higher than reference voltage
REFL is lower than reference voltage REFH.In this case, the output signal DETH of comparator 41 is H level, the output of comparator 42
Signal DETL is L level.It also, is H level with the output signal DET of door 43.The output signal DETX of NOT circuit 44, will believe
The inversion signal output of number DET.In other words, during the time T1 to time T2, output signal DETX is L level.
As previously mentioned, it is found that if capacitive character power converter 10 is normal, in a period of time T1 to time T2, to
The voltage of capacitor C11, capacitor C12 and capacitor C13 charge target value.Therefore, it is set as from time T1 to time T2
During, 45 input clock of Xiang Yumen counts CTR.In the normal situation of capacitive character power converter 10, from time T1 to
During time T2, being input to the output signal DETX of door 45 is L level.Therefore, L is kept with the output signal FLT of door 45
Level.
Fig. 7 is the output of each element of the failure determinating circuit 40 in the case where indicating 10 exception of capacitive character power converter
Figure.
For example, if the excessive perhaps short trouble of the capacitor of capacitor or being formed and short circuit paths and generating leakage, it is electric
The charging time of container is slack-off.Therefore, compared with Fig. 6 the case where, the slope of detection voltage VMd slows down.In this example, in preliminary filling
Electricity beginning after, by time T3 (> T2) when, detection voltage VMd be higher than reference voltage REFL.
Until being played since precharge by time T3, detection voltage VMd is lower than reference voltage REFL and benchmark electricity
Press REFH.In this case, the output signal DETH of comparator 41 is H level, and the output signal DETL of comparator 42 is L electricity
It is flat.It also, is L level with the output signal DET of door 43, signal DETX is H level.In other words, from time T1 to time
During T2, signal DETX is H level.Therefore, during the output signal FLT of generation and door 45 is H level.
In addition, obstructed overcharge is completed and stops charging, by limiting charging upper limit current potential, thus for big
Abnormality detection is also able to carry out in the case where slope of detection voltage VMd.In this case, it in the same manner as Fig. 7, generates and door 45
Output signal FLT be H level during.In addition, about capacitor deficiency, since charging complete detection signal is more early than imagining, because
This can easily be detected.For example, another means as detection charge completion time, it is also contemplated that being detected to charging complete
The method that the timing of signal and the counting of counter are compared.
In the present note, the value for exporting timing, reference voltage REFL, reference voltage REFH of clock count CTR etc. can
It suitably changes.
In this way, failure determinating circuit 40 exports the signal of H level in the case where capacitive character 10 exception of power converter.
If exporting the signal of H level from failure determinating circuit 40, for example, control circuit 50 drives capacitive character power converter 10
It is dynamic.Continue to drive in the presence of abnormal power converter unit 1 as a result, is able to suppress and causes a possibility that further bad.This
Outside, in the event of an abnormality, failure can also be reported to outside.
As described above, input voltage V1 decompression is by power converter unit 1 by capacitive character power converter 10
Between voltage V2.Also, medium voltage V2 is further depressured as output voltage V3 by irritability power converter 20.Therefore,
Deposited in an exceptional case in capacitive character power converter 10, may to irritability power converter 20 apply medium voltage V2 with
On overvoltage, 20 failure of irritability power converter.Therefore, by failure determinating circuit 40, determine capacitive character power converter
The exception of device 10 drives capacitive character power converter 10, so as to prevent the failure of irritability power converter 20.
Apply overvoltage furthermore, it is not necessary that imagining and be made of irritability power converter 20 high pressure resistant element.It is special
Not, by reducing the pressure resistance of switch element Q11 and switch element Q12 as FET, grid capacitance becomes smaller, in addition, connecting
Resistance also becomes smaller.Therefore, it is able to carry out the high frequency of switching frequency.Further, inductor L1 can be reduced, can be realized electricity
The miniaturization of force transducer unit 1.
In addition, the circuit structure of charging circuit 30 can be changed suitably.
Fig. 8 is the circuit diagram of another charging circuit 30A.
Charging circuit 30A shown in Fig. 8 the grid of switch element S31 connect with reference voltage power supply 34 and without using than
Compared with device, this respect is different from the charging circuit 30 of Fig. 5.If capacitor C11 is full charge, the source potential of switch element S31
Rise, switch element S31 is disconnected.In this way, not providing constant current to capacitor C11, capacitor C12 and capacitor C13.
In addition it is also possible to carry out the abnormal determination of capacitive character power converter 10 by digital processing.
Fig. 9 is the block diagram for carrying out the breakdown determination portion 40A of abnormal determination of capacitive character power converter 10.
Breakdown determination portion 40A has A/D converter (ADC) 401, arithmetic processing section 402, counter 403, storage unit 404.
The testing result of the output voltage VM of capacitive character power converter 10 is transformed to digital value by ADC401.Storage unit 404 is
EEPROM etc. stores the target value for being compared with output voltage VM.Storage unit 404 can be rewritten from outside.
Counter 403 exports clock count in preset timing, to arithmetic processing section 402.Arithmetic processing section 402 is e.g. micro-
Machine, in the timing of clock count, to the output voltage VM of capacitive character power converter 10 and the target value that is stored in storage unit 404
It is compared, Lai Jinhang fault verification.
(embodiment 2)
Hereinafter, being illustrated to power converter unit involved in embodiment 2.In the present embodiment, capacitive character
The structure of power converter is different from embodiment 1.
Figure 10 is the circuit diagram of capacitive character power converter 60 involved in embodiment 2.
Capacitive character power converter 60 include the input unit comprising terminal 601 and terminal 602 and comprising terminal 603 with
And the output section of terminal 604.In addition, capacitive character power converter 60 includes switch element S41, switch element S42, switch member
Part S43, switch element S44, switch element S45, switch element S46, switch element S47, capacitor C31, capacitor C32, electricity
Container C33 and ON-OFF control circuit 112.ON-OFF control circuit 112 carries out switch control to switch element S41~S47.
ON-OFF control circuit 112 is an example of " capacitive character side control unit " involved in the utility model.In addition, opening
Close the example that element S41~S47 is " capacitive character side switch element " involved in the utility model.
Switch element S41, switch element S42, switch element S43 are connected in series between terminal 601 and terminal 603.
In the tie point of switch element S41 and switch element S42, capacitor C31 is sequentially connected in series with switch element S45.It is opening
The tie point of element S42 and switch element S43 are closed, capacitor C32 is sequentially connected in series with switch element S46.Switch element
S44 is connected between the tie point of capacitor C31 and switch element S45 and terminal 603.Switch element S47 is connected to electricity
Between the tie point and terminal 603 of container C32 and switch element S46.Capacitor C33 is connected to terminal 603 and terminal 604
Between.
In addition, in this configuration, the both ends potential difference and capacitor of the both ends potential difference specific capacitance device C32 of capacitor C31
The both ends potential difference of device C33 is big.
Switch element S41, switch element S44, switch element S43, switch element S46 are set as by ON-OFF control circuit 112
It connects, switch element S42, switch element S45, switch element S47 is set as to disconnect (the 1st structure).Thus to capacitor C31's
Anode applies supply voltage current potential, applies output voltage current potential to cathode, applies the 2/ of supply voltage to the two poles of the earth of capacitor C31
3 potential difference.
Next, ON-OFF control circuit 112 is by switch element S41, switch element S44, switch element S43, switch element
S46 is set as disconnecting, and switch element S42, switch element S45, switch element S47 are set as to connect (the 2nd structure).As a result, in electricity
2/3 voltage of the anode performance supply voltage of container C31, shows GND current potential in cathode, applies to the anode of capacitor C32
2/3 voltage of supply voltage applies output voltage (1/3 current potential of=supply voltage) to cathode, to the two of capacitor C32
1/3 voltage of pole application supply voltage.If returning to the 1st structure from the 2nd structure, the cathode of capacitor C32 becomes GND
Current potential, anode become the 1/3 of supply voltage, provide it to output.
In this way, by switching each switch element, input voltage is depressurized as intermediate electricity in capacitive character power converter 60
Pressure.
The figure that movement when Figure 11 is for precharge based on charging circuit 30 is illustrated.
In the case where carrying out the precharge based on charging circuit 30, the ON-OFF control circuit of capacitive character power converter 60
Switch element S42, switch element S43, switch element S45, switch element S46 are set as connecting by 112, by switch element S41, are opened
Close element S44, switch element S47 is set as disconnecting.Capacitor C31, capacitor C32 and capacitor C33 become relative to filling as a result,
The structure that circuit 30 is connected in parallel.Also, it is provided from constant-current source 31 to capacitor C31, capacitor C32 and capacitor C33 permanent
Stream.
In the same manner as embodiment 1, if capacitor C31, capacitor C32 and capacitor C33 are charged to respectively as mesh
The reference voltage of scale value, then charging circuit 30 stops the charging based on constant current.
In addition, in the structure of capacitive character power converter 60 involved in present embodiment, capacitor C31, capacitor C32
It is not shared with the respective charging voltage of capacitor C33.Therefore, in the case where providing constant current to be charged, respectively to capacitor
The voltage that device C31, capacitor C32 and capacitor C33 charge is different.But in the same manner as aforementioned embodiments, by by capacitor
Device C31, capacitor C32 and capacitor C33 are pre-charged to voltage appropriate respectively, can inhibit dash current.
In addition, the on-off state energy of each switch element S41~S47 of the capacitive character power converter 60 when precharge
It is enough suitably to change.For example, it is also possible to switch element S31, S45, S42, S46, S43 are set as connecting, to capacitor C31,
After C32, C33 are pre-charged, switch element S42 is set as disconnecting, additional charging is carried out to capacitor C31.
In addition, the target voltage of capacitor C32 and capacitor C31 identical as the capacitor of capacitor C33 in capacitor C32
For VC32、VC31=2 × VC32In the case where, switch element S45, switch element S42, switch element S47 can also be set as connecing
It is logical, other are set as disconnecting, to be pre-charged.In this case, become capacitor C31 and capacitor C32 and capacitor
The structure that the series circuit of C33 is connected in parallel relative to charging circuit 30.
Further, in the present embodiment, since the capacitor of capacitor C31, capacitor C32 and capacitor C33 are different,
Therefore failure determinating circuit to capacitor C31, capacitor C32 and capacitor C33 at least any one charging voltage carry out
Detection, and be compared with target value, to carry out abnormal determination.In this case, according to detection charging voltage capacitor,
The value of timing, reference voltage REFL, reference voltage REFH to the output clock count CTR illustrated in embodiment 1 etc. are appropriate
Ground changes.
In addition, the capacitor of capacitor C31, capacitor C32 and capacitor C33 can arbitrarily be set, it can also be identical.Into one
Step ground, each capacitor can singly charge, can also charge multiple together.
In such manner, it is possible to structure when suitably change is charged.It on the other hand, can be by filling in the case where any
Electric current, the combined capacity of capacitor, target voltage etc. calculate the charging time.In other words, with independent of structure, as long as depositing
In the charging circuit with known current rate, the capacitor as charging object, the detection circuit of detection charging complete, prison
Depending on the timer of its time, it will be able to carry out precharge and fault detection.It, can be according to each capacitor about fault detection
It is detected, centralized detecting can also be carried out using multiple capacitors as group.In addition it is also possible to only detect the representative portion of a part
Part.
In embodiment 1,2, the power converter unit of decompression is illustrated, but power converter unit
It can be used for boosting.In this case, terminal Out1 and terminal Out2 shown in FIG. 1 are input unit, terminal In1 and terminal In2
For output section.Also, it boosts to the voltage inputted from the input unit of terminal Out1 and terminal Out2, from terminal In1 and end
The output section of sub- In2 exports.In the case of such a construction, charging circuit is being set to irritability power converter and capacitive character electricity
In the case where being pre-charged between force transducer, irritability power converter and capacitive character power converter are cut off, come
Constant current is provided to capacitive character power converter.Thereby, it is possible to prevent the dash current to capacitive character power converter.
Symbol description
C11, C12, C13... capacitor
C2... capacitor
C31, C32, C33... capacitor
In1, In2... terminal
L1... inductor
Out1, Out2... terminal
Q11, Q12... switch element (irritability side switch element)
R11, R12... resistance (voltage detection department)
S11, S12, S13, S14, S15, S16, S17... switch element (capacitive character side switch element)
S31... switch element
S32, S33... switch element
S41, S42, S43, S44, S45, S46, S47... switch element (capacitive character side switch element)
V1... input voltage
V2... medium voltage
V3... output voltage
VM... output voltage
1... power converter unit
10... capacitive character power converter
20... irritability power converter
21... driver (irritability side control unit)
30,30A... charging circuit
31... constant-current source
32... comparator
33... reference voltage power supply
34... reference voltage power supply
40... failure determinating circuit (breakdown determination portion)
40A... breakdown determination portion
41,42... comparator
43... with door
44...NOT circuit
45... with door
46... counter
50... control circuit (power converter limiting unit)
60... capacitive character power converter
101,102,103,104... terminal
111,112... ON-OFF control circuit
201,202,203,204... terminal
402... arithmetic processing section
403... counter
404... storage unit
601,602,603,604... terminal.
Claims (4)
1. a kind of power converter unit, it is characterised in that have:
Capacitive character power converter, input unit with input direct-current voltage, the output section for exporting DC voltage, relative to institute
State multiple capacitors that input unit is connected in parallel, multiple capacitive character sides switch element and to the multiple capacitive character side switch element
Carry out switch control capacitive character side control unit, by the state to the multiple capacitive character side switch element switch over come pair
The multiple capacitor carries out charge and discharge, to carry out buck to voltage；
Irritability power converter is connected to the input unit or the output section, and there is inductor, irritability side to switch
Element and the irritability side control unit that switch control is carried out to irritability side switch element, by opening the irritability side
The energy that the state of pass element switches over the next opposite inductor carries out storage electric discharge, to carry out buck to voltage；With
Charging circuit provides constant current from the constant-current source to the tie point of the multiple capacitor, or cut with constant-current source
It is disconnected to provide.
2. power converter unit according to claim 1, which is characterized in that
The power converter unit is also equipped with:
The charging voltage of voltage detection department, any capacitor of opposite the multiple capacitor is detected；With
Abnormality determination unit, the detected value and target value detect to the voltage detection department is compared, to determine exception.
3. power converter unit according to claim 2, which is characterized in that
The abnormality determination unit is acted at the appointed time after the starting of the capacitive character power converter.
4. according to power converter unit described in claim 2 or 3, which is characterized in that
The power converter unit is also equipped with: power converter limiting unit is determined as abnormal feelings in the abnormality determination unit
Under condition, the power converter based on the capacitive character power converter is limited.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-116773 | 2016-06-13 | ||
| JP2016116773 | 2016-06-13 | ||
| PCT/JP2017/020540 WO2017217248A1 (en) | 2016-06-13 | 2017-06-02 | Power converter unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209267450U true CN209267450U (en) | 2019-08-16 |
Family
ID=60663184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201790000939.5U Active CN209267450U (en) | 2016-06-13 | 2017-06-02 | Power converter unit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN209267450U (en) |
| WO (1) | WO2017217248A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112583255A (en) * | 2020-12-18 | 2021-03-30 | 合肥联宝信息技术有限公司 | Power supply device of electronic equipment and electronic equipment |
| CN112781628A (en) * | 2019-11-01 | 2021-05-11 | 株式会社三丰 | Encoder and detection head of encoder |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI679514B (en) * | 2018-12-04 | 2019-12-11 | 新唐科技股份有限公司 | Power converter |
| JP7132840B2 (en) * | 2018-12-14 | 2022-09-07 | 株式会社Subaru | Inrush current limiting system |
| TWI689161B (en) * | 2018-12-22 | 2020-03-21 | 新唐科技股份有限公司 | Power converter |
| WO2024162161A1 (en) * | 2023-02-02 | 2024-08-08 | ローム株式会社 | Charge pump circuit, semiconductor device, switch control device, and vehicle |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002233139A (en) * | 2001-02-05 | 2002-08-16 | Matsushita Electric Ind Co Ltd | Dc-dc converter |
| JP2009055722A (en) * | 2007-08-28 | 2009-03-12 | Seiko Npc Corp | Charge-pump power supply circuit |
| JP5626175B2 (en) * | 2011-10-06 | 2014-11-19 | 株式会社デンソー | Overvoltage protection circuit |
| JP6376797B2 (en) * | 2014-03-27 | 2018-08-22 | 新日本無線株式会社 | Charge pump circuit |
-
2017
- 2017-06-02 WO PCT/JP2017/020540 patent/WO2017217248A1/en active Application Filing
- 2017-06-02 CN CN201790000939.5U patent/CN209267450U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781628A (en) * | 2019-11-01 | 2021-05-11 | 株式会社三丰 | Encoder and detection head of encoder |
| CN112781628B (en) * | 2019-11-01 | 2024-05-03 | 株式会社三丰 | Encoder and detection head for encoder |
| CN112583255A (en) * | 2020-12-18 | 2021-03-30 | 合肥联宝信息技术有限公司 | Power supply device of electronic equipment and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017217248A1 (en) | 2017-12-21 |
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