CN205828172U

CN205828172U - Active AC capacitor

Info

Publication number: CN205828172U
Application number: CN201620663989.9U
Authority: CN
Inventors: 郑自修; 卢烈云
Original assignee: WUHAN DYNAMIC TECHNOLOGY Co Ltd
Current assignee: WUHAN DYNAMIC TECHNOLOGY Co Ltd
Priority date: 2016-06-29
Filing date: 2016-06-29
Publication date: 2016-12-21
Anticipated expiration: 2026-06-29

Abstract

The utility model discloses a kind of active ac capacitor, lead-in wire IN1 and IN2 of alternating current circuit, two electrochemical capacitor Cp and Cn, four diode D1 D4, four simulant electronic switch K1 K4 can be directly accessed including two and control the ON-OFF control circuit of switch K1 K4 break-make；Wherein, the positive pole of electrochemical capacitor Cp is connected on lead-in wire IN1, negative pole is connected with the positive pole of diode D1 and the negative pole of diode D2 respectively, and the negative pole of diode D1 and the positive pole of diode D2 connect one end of switch K1 and K2 respectively, and the other end of switch K1 and K2 is connected on lead-in wire IN2；The negative pole of electrochemical capacitor Cn is connected on lead-in wire IN1, and positive pole is connected with the negative pole of diode D3 and the positive pole of diode D4 respectively, and the positive pole of diode D3 and the negative pole of diode D4 connect one end of switch K3 and K4 respectively, and the other end of switch K3 and K4 is connected on lead-in wire IN2；ON-OFF control circuit is connected between lead-in wire IN1 and IN2, and is connected with four switch K1 K4 respectively, is used for controlling switch Guan Bi or disconnecting.

Description

Active ac capacitor

Technical field

This utility model relates to electronic information technical field, more specifically, particularly relates to a kind of active ac capacitor.

Background technology

In single phase ac split-phase capacitor formula motor, it is necessary to use electric capacity phase shift to start and turning moment to produce.For Low voltage motor (such as AC24V), the capacity of split-phase capacitor is by much larger than with the capacitance needed for power high-voltage motor.Such as one The motor split-phase capacitor capacity of AC220V is 1uF, and needed for the AC24V motor of same power, the capacity of split-phase capacitor is about near 100uF.Even if the small machine of 90W, an AC24V, its split-phase capacitor capacity also reaches 600uF.The most jumbo ac capacitor, Its volume is big, often in many application scenarios, as having enough installing spaces by being difficult in the equipment such as YE；Another Aspect also is difficult to find the electric capacity of such specification on the market.

Existing nonpolarity small size large bulk capacitance, such as non-polarized electrolytic electric capacity, ceramic paster electric capacity etc., all because its Medium is lost excessive under exchange status, and heating is serious and cannot be used for alternating current circuit, and can be used for the thin-film electro of alternating current circuit Hold to wait and cannot accomplish again small size.The external exchange small size using special process to make, large bulk capacitance selling at exorbitant prices, typically The product of purposes is difficult to bear.

Utility model content

The purpose of this utility model is for above-mentioned the deficiencies in the prior art, it is provided that a kind of volume is little and big the having of capacity Source AC capacitor, it is controlled by circuit, makes common electrochemical capacitor can work in alternating current circuit, to solve common exchange The problem that electric capacity volume is excessive.

For achieving the above object, the technical solution adopted in the utility model is: a kind of active ac capacitor, including two Can be directly accessed the lead-in wire (IN1, IN2) of alternating current circuit, two electrochemical capacitors (Cp, Cn), four diodes (D1-D4), four Simulant electronic switch (K1-K4) and the ON-OFF control circuit of control switch (K1-K4) break-make；Wherein, the first electrochemical capacitor (Cp) positive pole is connected on the first lead-in wire (IN1), negative pole respectively with positive pole and second diode (D2) of the first diode (D1) Negative pole be connected, the negative pole of the first diode (D1) and the positive pole of the second diode (D2) connect the first switch (K1) and second respectively One end of switch (K2), the other end of the first switch (K1) and second switch (K2) is connected on the second lead-in wire (IN2)；Second electrolysis The negative pole of electric capacity (Cn) is connected on the first lead-in wire (IN1), positive pole respectively with negative pole and the 4th diode of the 3rd diode (D3) (D4) positive pole be connected, the positive pole of the 3rd diode (D3) and the negative pole of the 4th diode (D4) connect respectively the 3rd switch (K3) and One end of 4th switch (K4), the other end of the 3rd switch (K3) and the 4th switch (K4) is connected on the second lead-in wire IN2；Switch control Circuit processed is connected between the first lead-in wire (IN1) and the second lead-in wire (IN2), and is connected with four switches (K1-K4) respectively, is used for controlling System switch Guan Bi or disconnection.

This utility model is novel in design, the only work when exchanging positive half cycle due to the first electrochemical capacitor (Cp), the second electrolysis Electric capacity (Cn) only works when negative half period, and the nonpolarity change of voltage at electric capacity two ends, electric capacity is still equivalent to be operated in DC state Under, alternately it is responsible for the positive-negative half-cycle discharge and recharge of alternating current by the electrochemical capacitor (Cp and Cn) of two polarized, the most completely etc. Imitate in nonpolarity ac capacitor duty in alternating current circuit.

Accompanying drawing explanation

Fig. 1 is circuit theory diagrams of the present utility model；

Fig. 2 is this utility model working cycle figure in alternating current circuit；

Fig. 3 is circuit structure diagram of the present utility model.

Detailed description of the invention

The utility model is described in further detail for embodiment in below in conjunction with the accompanying drawings, but is not intended that this reality With novel any restriction.

As it is shown in figure 1, a kind of active ac capacitor that this utility model provides, alternating current can be directly accessed including two Lead-in wire IN1 and IN2 on road, two electrochemical capacitor Cp and Cn, four diode D1-D4, four simulant electronic switch K1-K4, with And control the ON-OFF control circuit of switch K1-K4 break-make.Wherein, the positive pole of the first electrochemical capacitor (Cp) is connected on the first lead-in wire (IN1), on, negative pole is connected with the positive pole of the first diode (D1) and the negative pole of the second diode (D2) respectively, the first diode (D1) negative pole and the positive pole of the second diode (D2) connect the first switch (K1) and one end of second switch (K2) respectively, and first opens The other end closing (K1) and second switch (K2) is connected on the second lead-in wire (IN2)；The negative pole of the second electrochemical capacitor (Cn) is connected on On one lead-in wire (IN1), positive pole is connected with the negative pole of the 3rd diode (D3) and the positive pole of the 4th diode (D4) respectively, and the three or two The positive pole of pole pipe (D3) and the negative pole of the 4th diode (D4) connect the 3rd switch (K3) and one end of the 4th switch (K4) respectively, the The other end of three switches (K3) and the 4th switch (K4) is connected on the second lead-in wire IN2；ON-OFF control circuit is connected on the first lead-in wire (IN1) between and the second lead-in wire (IN2), and it is connected with four switches (K1-K4) respectively, is used for controlling switch Guan Bi or disconnecting.

Shown in Fig. 2, this utility model work process in alternating current circuit is as follows:

1, during alternating voltage is 0～π (positive half cycle), ON-OFF control circuit controls first, second switch K1, K2 and closes Closing, the three, the 4th switch K3, K4 disconnect.During 0～0.5 π, the first electrochemical capacitor Cp is by the first switch K1, the one or two pole Pipe D1 positive charge, the voltage at electric capacity two ends increases from zero to maximum Vm；During 0.5 π～π, the first electrochemical capacitor Cp leads to Crossing second switch K2, the second diode D2 forward electric discharge, the voltage at electric capacity two ends drops to zero from Vm.

2, alternating voltage be π～2 π (negative half period) period, ON-OFF control circuit control the three, the 4th switch K3, K4 close Closing, first, second switch K1, K2 disconnects.During π～1.5 π, the second electrochemical capacitor Cn is by the 3rd switch K3, the three or two pole Pipe D3 reverse charging, it is reverse that the voltage at electric capacity two ends increases from zero to maximum Vm()；During 1.5 π～2 π, the second electrolysis electricity Holding Cn and switch K4, the 4th diode D4 back discharge by the 4th, the voltage at electric capacity two ends is reverse from Vm() drop to zero.

Owing to the first electrochemical capacitor Cp only works when exchanging positive half cycle, the second electrochemical capacitor Cn only work when negative half period Making, the nonpolarity change of voltage at electric capacity two ends, electric capacity is still equivalent to be operated under DC state.Electrolysis by two polarized Electric capacity Cp and Cn is alternately responsible for the positive-negative half-cycle discharge and recharge of alternating current, the most fully equivalent in nonpolarity ac capacitor at alternating current Duty in road.Active ac capacitor operationally electric capacity does not generates heat, identical with working under DC state.

Fig. 3 is circuit structure diagram of the present utility model, and in the circuit, IN1 and IN2 is the lead-in wire of equivalent capacity, directly Incoming transport circuit；Charge and discharge capacitance when electric capacity Cp is to exchange positive half cycle, Cn is charge and discharge capacitance during exchange negative half period. Four switch K1, K2, K3, K4 tetra-switches in MOSFET Q1, Q2, Q3, Q4 corresponding diagram 1, diode D4, D5, D7, D8 couple Answer tetra-diodes of D1, D2, D3, D4 in Fig. 1.Wherein, the negative pole of diode D4 and the positive pole of diode D5 connect first respectively MOSFET Q1 and the drain electrode of the 2nd MOSFETQ2, the positive pole of diode D7 and the negative pole of diode D8 connect the 3rd respectively MOSFETQ3 and the drain electrode of the 4th MOSFETQ4, the source electrode of four MOSFET Q1-Q4 is all connected on lead-in wire IN2, and grid is all connected on In ON-OFF control circuit.

Described ON-OFF control circuit comprises two groups of regulator rectifier circuits, four optocoupler PH1-PH4, two diode D3 and D6, two audion T1 and T2 and some resistance.Wherein, the first optocoupler PH1 and the emitter stage of the 4th optocoupler PH4 triode side Connect a MOSFET Q1 and the grid of the 4th MOSFET Q4, the second optocoupler PH2 and the collection of the 3rd optocoupler PH3 triode side respectively Electrode connects the 2nd MOSFET Q2 and the grid of the 3rd MOSFET Q3 respectively.

Diode D1, electric capacity C1, resistance R1 and Zener diode Z1 form one group of regulator rectifier circuit, are used for exporting+15V Voltage, through the first optocoupler PH1 and the control of the 4th optocoupler PH4, drives a MOSFET Q1 and the 4th MOSFET Q4, it is achieved Charging and the electric discharge of Cn to Cp；Diode D2, electric capacity C2, resistance R2 and Zener diode Z2 form another group rectifying and voltage-stabilizing electricity Road, is used for exporting-15V voltage, through the second optocoupler PH2 and the control of the 3rd optocoupler PH3, drives the 2nd MOSFET Q2 and the Three MOSFET Q3, it is achieved electric discharge and the charging of Cn to Cp.

When equivalent capacity two ends alternating voltage IN1 is positive half cycle (0～π), diode D3 forward conduction, optocoupler PH1, Light emitting diode in PH2 flows through electric current, triode ON therein by audion T1, provides to the grid of Q1, Q2 and drives Galvanic electricity pressure, Q1, Q2 turn on.During 0～0.5 π, voltage is risen to Vm, electric capacity Cp through leading to that diode D4 and Q1 provides by 0 Charge in road；During 0.5 π～π, alternating voltage is in decline process (being dropped to 0 by Vm), and the path that Cp provides through D5 and Q2 is put Electricity.

When equivalent capacity two ends alternating voltage IN1 is negative half period (π～2 π), diode D6 forward conduction, optocoupler PH3, Light emitting diode in PH4 passes through audion T2(NPN) flow through electric current, triode ON therein, provide to the grid of Q3, Q4 Driving voltage, Q3, Q4 turn on.During π～1.5 π, voltage reversal change is risen to Vm by 0, and electric capacity Cn is through diode D7 The path charging provided with Q3；During 1.5 π～2 π, alternating voltage is dropped to 0 by Vm, and the path that Cn provides through D8 and Q4 is put Electricity.

Audion T1(PNP) and T2(NPN) for when alternating voltage amplitude changes, the electric current being maintained to flow through optocoupler is basic Constant.

Due to the alternately discharge and recharge of Cp, Cn, Cp only work, its both end voltage polarity and electrochemical capacitor when exchanging positive half cycle Polarity is identical；Cn is work when exchanging negative half period, and its both end voltage polarity is also identical with electrochemical capacitor polarity.Therefore with two electricity Solve the capacitor equivalent work process of one ac capacitor.

Claims

1. an active ac capacitor, it is characterised in that: include two lead-in wires that can be directly accessed alternating current circuit (IN1, IN2), two electrochemical capacitors (Cp, Cn), four diodes (D1-D4), four simulant electronic switches (K1-K4) and control are opened Close the ON-OFF control circuit of (K1-K4) break-make；Wherein, the positive pole of the first electrochemical capacitor (Cp) is connected on the first lead-in wire (IN1), negative Pole is connected with the positive pole of the first diode (D1) and the negative pole of the second diode (D2) respectively, the negative pole of the first diode (D1) and The positive pole of the second diode (D2) connects the first switch (K1) and one end of second switch (K2), the first switch (K1) and second respectively The other end of switch (K2) is connected on the second lead-in wire (IN2)；The negative pole of the second electrochemical capacitor (Cn) is connected on the first lead-in wire (IN1) On, positive pole is connected with the negative pole of the 3rd diode (D3) and the positive pole of the 4th diode (D4) respectively, the 3rd diode (D3) The negative pole of positive pole and the 4th diode (D4) connects the 3rd switch (K3) and one end of the 4th switch (K4), the 3rd switch (K3) respectively It is connected on the second lead-in wire IN2 with the other end of the 4th switch (K4)；ON-OFF control circuit is connected on the first lead-in wire (IN1) and second and draws Between line (IN2), and it is connected with four switches (K1-K4) respectively, is used for controlling switch Guan Bi or disconnecting.

Active ac capacitor the most according to claim 1, it is characterised in that: described active ac capacitor uses four MOSFET(Q1-Q4) using as switch, wherein, the negative pole of the first diode (D1) and the positive pole of the second diode (D2) are respectively Meet a MOSFET(Q1) and the 2nd MOSFET(Q2) drain electrode, the positive pole of the 3rd diode (D3) and the 4th diode (D4) Negative pole meets the 3rd MOSFET(Q3 respectively) and the 4th MOSFET(Q4) drain electrode, four MOSFET(Q1-Q4) source electrode be all connected on On second lead-in wire (IN2), grid is all connected in ON-OFF control circuit.

Active ac capacitor the most according to claim 2, it is characterised in that: described ON-OFF control circuit includes four Individual optocoupler (PH1-PH4), wherein, the emitter stage of the first optocoupler (PH1) and the 4th optocoupler (PH4) triode side connects first respectively MOSFET(Q1) and the 4th MOSFET(Q4) grid, the second optocoupler (PH2) and the colelctor electrode of the 3rd optocoupler (PH3) triode side Meet the 2nd MOSFET(Q2 respectively) and the 3rd MOSFET(Q3) grid.

Active ac capacitor the most according to claim 3, it is characterised in that: described ON-OFF control circuit also includes Two groups of regulator rectifier circuits, two diodes, two audions and some resistance.