阅读说明：本技术 一种电容均压电路 (Capacitor voltage-sharing circuit ) 是由 刘军 蒋中为 于 2019-10-07 设计创作，主要内容包括：本发明公开了一种电容均压电路,包括串连在总线Bus与地之间的电解电容C1和电解电容C2；还包括三极管Q1、三极管Q2、均压电阻R1、均压电阻R6、分压电阻R10、分压电阻R11；三极管Q1为NPN型三极管、三极管Q2为PNP三极管；三极管Q1的集电极和基极分别通过均压电阻R1和分压电阻R10接总线Bus,三极管Q1的发射极和基极分别三极管Q2的发射极和基极相连,三极管Q2的集电极通过均压电阻R6接地,分压电阻R11设置在三极管Q2的基极与地之间,三极管Q1的发射极与三极管Q2的发射极相连的公共端接均压输出V2。本发明由于具有均压电阻控制电路,可以将功耗降低到很小,满足用户的需要。(The invention discloses a capacitor voltage-sharing circuit, which comprises an electrolytic capacitor C1 and an electrolytic capacitor C2, wherein the electrolytic capacitor C1 and the electrolytic capacitor C2 are connected between Bus and the ground in series; the voltage-sharing circuit also comprises a triode Q1, a triode Q2, a voltage-sharing resistor R1, a voltage-sharing resistor R6, a voltage-dividing resistor R10 and a voltage-dividing resistor R11; the triode Q1 is an NPN type triode, and the triode Q2 is a PNP triode; the collector and the base of the triode Q1 are respectively connected with the Bus through a voltage-sharing resistor R1 and a voltage-sharing resistor R10, the emitter and the base of the triode Q1 are respectively connected with the emitter and the base of the triode Q2, the collector of the triode Q2 is grounded through a voltage-sharing resistor R6, the voltage-sharing resistor R11 is arranged between the base of the triode Q2 and the ground, and the common end of the emitter of the triode Q1 and the emitter of the triode Q2 is connected with a voltage-sharing output V2. The invention has the voltage-sharing resistance control circuit, so that the power consumption can be reduced to be very low, and the requirements of users can be met.)

1. A capacitor voltage-sharing circuit comprises an electrolytic capacitor C1 and an electrolytic capacitor C2 which are connected between a Bus and the ground in series, wherein the cathode of the electrolytic capacitor C1 is connected with the anode of the electrolytic capacitor C2 to form a voltage-sharing output V2, the anode of the electrolytic capacitor C1 is connected with the Bus, and the cathode of the electrolytic capacitor C2 is grounded; the method is characterized in that: the voltage-sharing circuit also comprises a triode Q1, a triode Q2, a voltage-sharing resistor R1, a voltage-sharing resistor R6, a voltage-dividing resistor R10 and a voltage-dividing resistor R11; the triode Q1 is an NPN type triode, and the triode Q2 is a PNP triode; the collector and the base of the triode Q1 are respectively connected with the Bus through a voltage-sharing resistor R1 and a voltage-sharing resistor R10, the emitter and the base of the triode Q1 are respectively connected with the emitter and the base of the triode Q2, the collector of the triode Q2 is grounded through a voltage-sharing resistor R6, the voltage-sharing resistor R11 is arranged between the base of the triode Q2 and the ground, and the common end of the emitter of the triode Q1 and the emitter of the triode Q2 is connected with a voltage-sharing output V2.

2. The capacitance voltage equalizing circuit of claim 1, wherein: the voltage dividing resistor R10 is formed by connecting a voltage dividing resistor R2 and a voltage dividing resistor R3 in series, and the voltage dividing resistor R11 is formed by connecting a voltage dividing resistor R4 and a voltage dividing resistor R5 in series.

Technical Field

The invention relates to a capacitor voltage-sharing circuit.

Background

With the popularization of low-carbon energy-saving concepts, the efficiency of the power supply is higher and higher, and the power consumption of the power supply is low.

At present, high-voltage capacitors are connected in series, as shown in fig. 1, two electrolytic capacitors C1 and C2 are connected in series between Bus and ground, the leakage current value of each aluminum electrolytic capacitor is different, that is, the equivalent direct current resistance between two electrodes is different, so that a small resistor is respectively used as a voltage-sharing resistor in the series-connected capacitors, because the equivalent direct current resistance of the capacitor is very large, if a small resistor is connected in parallel, the total resistance value after parallel connection is close to the parallel small resistance value, that is, the resistance value of the voltage-sharing resistor, and because the voltage-sharing resistors are the same type, the partial voltage of the capacitor can be ensured to be close, but the power consumption is increased.

Disclosure of Invention

The invention provides a capacitor voltage-sharing circuit aiming at the defects that the power consumption is increased and the requirement of a user cannot be met due to the use of a voltage-sharing resistor in the prior known capacitor voltage-sharing circuit.

The technical scheme adopted by the invention is as follows: a capacitor voltage-sharing circuit comprises an electrolytic capacitor C1 and an electrolytic capacitor C2 which are connected between a Bus and the ground in series, wherein the cathode of the electrolytic capacitor C1 is connected with the anode of the electrolytic capacitor C2 to form a voltage-sharing output V2, the anode of the electrolytic capacitor C1 is connected with the Bus, and the cathode of the electrolytic capacitor C2 is grounded; the voltage-sharing circuit also comprises a triode Q1, a triode Q2, a voltage-sharing resistor R1, a voltage-sharing resistor R6, a voltage-dividing resistor R10 and a voltage-dividing resistor R11; the triode Q1 is an NPN type triode, and the triode Q2 is a PNP triode; the collector and the base of the triode Q1 are respectively connected with the Bus through a voltage-sharing resistor R1 and a voltage-sharing resistor R10, the emitter and the base of the triode Q1 are respectively connected with the emitter and the base of the triode Q2, the collector of the triode Q2 is grounded through a voltage-sharing resistor R6, the voltage-sharing resistor R11 is arranged between the base of the triode Q2 and the ground, and the common end of the emitter of the triode Q1 and the emitter of the triode Q2 is connected with a voltage-sharing output V2.

The invention has the voltage-sharing resistance control circuit, so that the power consumption can be reduced to be very low, and the requirements of users can be met.

Further, in the capacitor voltage equalizing circuit described above: the voltage dividing resistor R10 is formed by connecting a voltage dividing resistor R2 and a voltage dividing resistor R3 in series, and the voltage dividing resistor R11 is formed by connecting a voltage dividing resistor R4 and a voltage dividing resistor R5 in series.

The invention will be explained in more detail below with reference to the drawings and examples.

Drawings

Fig. 1 is a diagram of a capacitor series connection.

Fig. 2 is a circuit diagram of a voltage-sharing resistor control circuit in embodiment 1 of the present invention.

Fig. 3 is a capacitor voltage equalizing circuit diagram according to embodiment 1 of the present invention.

Detailed Description