A kind of dynamic voltage-balancing during based on capacitances in series
Technical field
Voltage balancing circuit when the utility model relates to a kind of capacitances in series, in particular, dynamic voltage-balancing when the utility model relates to one based on capacitances in series.
Background technology
Current series capacitance voltage balancing circuit is most adopt capacitor two ends and on the resistance less than capacitor resistance carry out balanced voltage, its weak point is that the volume of resistance is large, power is high, causes excessive power drain, efficiency step-down.
Summary of the invention
The purpose of this utility model is effectively to overcome the deficiency of above-mentioned technology, and a kind of dynamic voltage-balancing during based on capacitances in series is provided, and the volume of this circuit is little, power consumption is low, has reduced production cost.
Dynamic voltage-balancing when the technical solution of the utility model is achieved in that one based on capacitances in series, its improvements are: it comprises a NPN type triode Q1, a positive-negative-positive triode Q2, the base stage of the base stage of triode Q1 and triode Q2 is electrically connected, and being connected between the base stage of triode Q1 and the base stage of triode Q2 has a terminal A on wire; The emitter of the emitter of described triode Q1 and triode Q2 is electrically connected, and being connected between the emitter of triode Q1 and the emitter of triode Q2 has an end points N on wire; Between the collector electrode of described terminal A and triode Q1, be provided with first group of resistance and second group of resistance, and there is an end points P on connecting circuit between first group of resistance and second group of resistance, between end points P and above-mentioned end points N, be provided with an electrochemical capacitor C1; Between the collector electrode of described terminal A and triode Q2, be provided with the 3rd group of resistance and the 4th group of resistance, and there is an end points G on the connecting circuit between the 3rd group of resistance and the 4th group of resistance, between end points G and above-mentioned end points N, be provided with an electrochemical capacitor C2, electrochemical capacitor C1 and electrochemical capacitor C2 form cascaded structure.
In above-mentioned circuit structure, described first group of resistance is composed in series by resistance R 1, resistance R 2 and resistance R 3, and resistance: R1=R2=R3.
In above-mentioned circuit structure, the resistance of described resistance R 1, resistance R 2 and resistance R 3 is 500K.
In above-mentioned circuit structure, described second group of resistance is composed in series by resistance R 7, resistance R 8 and resistance R 9, and resistance: R7=R8=R9.
In above-mentioned circuit structure, the resistance of described resistance R 7, resistance R 8 and resistance R 9 is 200K.
In above-mentioned circuit structure, described the 3rd group of resistance is composed in series by resistance R 4, resistance R 5 and resistance R 6, and resistance: R4=R5=R6.
In above-mentioned circuit structure, the resistance of described resistance R 4, resistance R 5 and resistance R 6 is 500K.
In above-mentioned circuit structure, described the 4th group of resistance is composed in series by resistance R 10, resistance R 11 and resistance R 12, and resistance: R10=R11=R12.
In above-mentioned circuit structure, the resistance of described resistance R 10, resistance R 11 and resistance R 12 is 200K.
In above-mentioned circuit structure, the capacitance of described electrochemical capacitor is 1000uF, and rated voltage is 315V.
The beneficial effects of the utility model are: in the time of the electrochemical capacitor C1 connecting, C2 Voltage unbalance, adjust series capacitance C1, C2 voltage by triode Q1, triode Q2, make series capacitance C1, the C2 balance of voltage, resistance R 1-R12 in figure can use SMD resistance (Chip-R), two series capacitance V
_{nG}at V
_{pG}when fluctuation, the utility model is realized dynamic voltage balancing near/2, and its resistance smaller volume, power consumption are low, and have reduced Material Cost.
[brief description of the drawings]
Fig. 1 is specific embodiment of the utility model circuit diagram.
[embodiment]
Below in conjunction with drawings and Examples, the utility model will be further described.
Shown in Fig. 1, the one that the utility model discloses dynamic voltage-balancing during based on capacitances in series, this circuit mainly includes a NPN type triode Q1, a positive-negative-positive triode Q2, the base stage of the base stage of triode Q1 and triode Q2 is electrically connected, and being connected between the base stage of triode Q1 and the base stage of triode Q2 has a terminal A on wire; The emitter of the emitter of triode Q1 and triode Q2 is electrically connected, and being connected between the emitter of triode Q1 and the emitter of triode Q2 has an end points N on wire.
Further, between the collector electrode of above-mentioned terminal A and triode Q1, be provided with first group of resistance and second group of resistance, and on the connecting circuit between first group of resistance and second group of resistance, there is an end points P, between end points P and above-mentioned end points N, be provided with an electrochemical capacitor C1; In the present embodiment, first group of resistance is composed in series by resistance R 1, resistance R 2 and resistance R 3, resistance: R1=R2=R3, and the resistance of resistance R 1, resistance R 2 and resistance R 3 is 500K ohm.Second group of resistance is composed in series by resistance R 7, resistance R 8 and resistance R 9, and resistance: R7=R8=R9, and the resistance of resistance R 7, resistance R 8 and resistance R 9 is 200K ohm.
Further, between the collector electrode of terminal A and triode Q2, be provided with the 3rd group of resistance and the 4th group of resistance, and there is an end points G on the connecting circuit between the 3rd group of resistance and the 4th group of resistance, between end points G and above-mentioned end points N, be provided with an electrochemical capacitor C2, electrochemical capacitor C1 and electrochemical capacitor C2 form cascaded structure.In the present embodiment, the 3rd group of resistance is composed in series by resistance R 4, resistance R 5 and resistance R 6, and resistance: R4=R5=R6, and the resistance of resistance R 4, resistance R 5 and resistance R 6 is 500K.The 4th group of resistance is composed in series by resistance R 10, resistance R 11 and resistance R 12, and resistance: R10=R11=R12, and the resistance of resistance R 10, resistance R 11 and resistance R 12 is 200K.In addition, the capacitance of described electrochemical capacitor is 1000uF, and rated voltage is 315V.
In conjunction with above-mentioned structure, we are described in detail the course of work of the present utility model, the principle of its work is as follows: shown in Fig. 1, as the electrochemical capacitor C1 of series connection, when C2 Voltage unbalance, by triode Q1, triode Q2 adjusts series capacitance C1, C2 voltage, make series capacitance C1, the C2 balance of voltage, resistance R 1-R12 in figure can use SMD resistance (Chip-R), specifically be implemented as follows, end points P is two series connection electrolysis capacitor C 1, the positive pole of C2, end points G is two series connection electrolysis capacitor C 1, the negative pole of C2, N point is two series connection electrolysis capacitor C 1, the central point of C2.From Fig. 1, can learn voltage V
_{aG}=V
_{pG}/ 2, in the time of the series capacitance balance of voltage, V
_{pN}=V
_{nG}, i.e. V
_{aG}=V
_{nG}; In the time of series capacitance Voltage unbalance, there are two kinds of situation: V
_{pN}>V
_{nG}(be V
_{nG}<V
_{aG}) and V
_{pN}<V
_{nG}(V
_{nG}>V
_{aG}), therefore the operating state of Fig. 1 circuit has three: 1, V
_{aG}=V
_{nG}time, series capacitance C1 is described, the balance of voltage of C2, at this time Q1, Q2 cut-off.2, V
_{nG}<V
_{aG}time, Q1 conducting, Q2 cut-off, by resistance R, 7-R9 charges to C2, and C1 discharges by R7-R9 simultaneously, until V
_{aG}=V
_{nG}time, Q1, Q2 cut-off.3, V
_{nG}>V
_{aG}time, Q1 cut-off, Q2 conducting, by resistance R, 10-R12 charges to C1, and C2 discharges by R10-R12 simultaneously, until V
_{aG}=V
_{nG}time, Q1, Q2 cut-off.As from the foregoing, two series capacitance V
_{nG}at V
_{pG}when fluctuation, the utility model is realized dynamic voltage balancing near/2, and its resistance smaller volume, power consumption are low, and have reduced Material Cost.
Described above is only preferred embodiment of the present utility model, and above-mentioned specific embodiment is not to restriction of the present utility model.In technological thought category of the present utility model, can there is various distortion and amendment, retouching that all those of ordinary skill in the art make according to above description, revise or be equal to replacement, all belong to the scope that the utility model is protected.