CN201038818Y

CN201038818Y - Reversible charge-reverse conversion power control device

Info

Publication number: CN201038818Y
Application number: CNU2007200960694U
Authority: CN
Inventors: 张德宽; 徐道恒; 孙继先
Original assignee: Tianjin Tongxuan Frequency Conversion Technology Coltd
Current assignee: Tianjin Fangyuan Electric Co., Ltd.
Priority date: 2007-05-23
Filing date: 2007-05-23
Publication date: 2008-03-19
Anticipated expiration: 2017-05-23

Abstract

The utility model discloses a reversible charge-inverse power control device, comprising an AC power, a rectifier inverse bridge, an output capacitance loop, an accumulator and a battery which are all connected mutually and sequentially, a buck-boost transformer is arranged between the accumulator and the battery. The utility model has the good effect that the application efficiency of a main circuit is improved as the circuit of the topological structure of the utility model is in a working state when the battery is charging and discharging, elements are reduced because of the topological structure, the mounting and the maintaining of the product are more convenient, the loading adaptability is increased when reducing the volume of the equipment, and the cost of manufacture is reduced. The technology can be applied in an emergency power supply of common electrified wire netting, a vehicle-carrying inverse power, and a vehicle-carrying accumulator charging device and so on.

Description

But reversed charge-inverter control device

Technical field

The utility model relates to a kind of inverter power supply device, but particularly relates to reversed charge one inverter control device in a kind of emergency power supply unit.

Background technology

Fig. 1 is buck chopper charged state circuit theory diagrams; Fig. 2 boost chopper inversion working state circuit schematic diagram.In the conventional inversion supply unit, comprise two groups of main circuit topological structures, one group is buck chopper charging circuit structure, another group is boost chopper inversion discharge circuit structure; As shown in Figure 1, buck chopper device operation principle is: alternating current is exported to the capacitor C loop by the rectifier bridge that T1, T2, T3, T4 form, and the buck chopper device main circuit of forming by T7, T8 and inductance L charges the battery; Shown in Figure 2, the boost chopper operation principle is: the boost chopper main circuit that battery is formed by T17, T18 and inductance L 1 discharges to output capacitance C1 loop, gives load as power supply by the inverter bridge that Tl1, T12, T13 and T14 form.In AC network just often, charge the battery through buck circuit; After the AC network outage, give load as power supply through boost chopper.When line voltage recovers, emergency power supply will revert to mains supply again.Emergency power supply can be various power consumption equipment power supplies in different occasions when grid power blackout.There is following shortcoming in above circuit: in this system configuration, rectifier bridge has similar structure to inverter bridge, but must independently respectively form two cover main circuit unit, causes the redundancy waste of part of devices.

Summary of the invention

Technical problem to be solved in the utility model is to overcome the shortcoming of prior art, the integrated circuit topological structure that provides a kind of inversion two cover circuit that the rectification step-down can be charged, boosted integrate.

The technical scheme that the utility model adopted is: but a kind of reversed charge one inverter control device comprises interconnective successively AC power, commutation inversion bridge, output capacitance loop, accumulator and battery; Between described accumulator and battery, be provided with buck-boost converter.

Described buck-boost converter is made up of T27 and two insulated gate bipolar pipes of T28, the collector electrode of T27 is connected with described output capacitance loop is anodal, the T27 emitting stage is connected with the collector electrode of T28, and the emitter of T28 is connected with output capacitance loop negative pole, and the emitter of T27 is connected with described accumulator.

The beneficial effects of the utility model are: because topological structure of the present utility model circuit when the battery charge and discharge is all in running order, improved the application efficiency of main circuit, new topological structure has reduced components and parts, make the installation and maintenance of product convenient, when reducing equipment volume, workload-adaptability is strengthened, reduced production cost, this technology can be applicable to public electric wire net emergency power supply, vehicle-mounted inverter, Vehicular accumulator cell charging device etc.

Description of drawings

Fig. 1 is buck chopper charged state circuit theory diagrams;

Fig. 2 boost chopper inversion working state circuit schematic diagram;

Fig. 3 is the utility model circuit block diagram;

Fig. 4 is that the utility model optimizes and combines topological diagram.

Among the figure:

1: AC power 2: commutation inversion bridge 3: the output capacitance loop

4: buck-boost converter 5: accumulator 6: battery

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:

As shown in Figure 3 and Figure 4, the compound full-control type voltage driven type power electronic device that the utility model insulated gate bipolar power transistor IGBT is made up of BJT (double pole triode) and MOS (insulating gate type field effect tube), in conjunction with the Controlled by Microcomputer technology, adopt the 32-bit number signal processor (TMS320LF2407PQGA) of American TI Company the break-make of six insulated gate bipolar transistors such as T1～T4, T7, T8 to be controlled with software program.As shown in Figure 4, T21, T22, T23, T24, T27, T28 is the IGBT pipe, but reversed charge one inverter control device, when constituting the buck chopper device: AC power 1 is passed through by T21, T22, commutation inversion bridge 2 output currents that four IGBT pipes of T23 and T24 are formed, the operating state of commutation inversion bridge 2 is a rectifier bridge at this moment, after the capacitor C in output capacitance loop 3 filtering, enter by T27, the buck-boost converter 4 that two IGBT pipes of T28 are formed, this moment, the operating state of buck-boost converter 4 was a chopper, the collector electrode of T27 is connected with described output capacitance loop is anodal, the T27 emitting stage is connected with the collector electrode of T28, the emitter of T28 is connected with output capacitance loop negative pole, the emitter of T27 is connected with accumulator 5, electric current by chopper output, charge for battery 6 through the accumulator of being made up of inductance L 5, buck chopper device stable state duty ratio is only relevant with the ratio of the capacitance voltage of the capacitor C in output capacitance loop 3 with battery 6 voltages, and is irrelevant with other parameter.The charging current ripple is only relevant with dc inductance after duty ratio, carrier frequency and cell voltage are determined, given suitable ripple current can be tried to achieve buck chopper device stable state duty ratio.Reduce the current ripples coefficient, can be by adding big inductance quantity, improve carrier frequency or reduce capacitance voltage and the pressure reduction of cell voltage being realized.

But the utility model reversed charge one inverter control device, when constituting boost chopper: battery 6 is by the energy storage device inductance L of accumulator 5, through T27, the buck-boost converter 4 that two IGBT pipes of T28 are formed, this moment, the operating state of buck-boost converter 4 was a boost chopper, the capacitor C in output capacitance loop 3 is given in discharge, discharging current passes through T21, T22, the commutation inversion bridge 2 that T23 and T24 form is exported to load as power supply, the operating state of commutation inversion bridge 2 is an inverter bridge at this moment, boost chopper when switch transistor T 28 conductings to the inductance L energy storage, because the effect (electric current can not suddenly change) that forces of inductance L is discharged into the part (the inductive current consecutive hours can not be transferred to load-side with whole energy) of inductance L stored energy on the output capacitance loop 3, improve the purpose that capacitor C goes up voltage during shutoff thereby reach.General condenser capacity is determined according to bearing power, reasonably capacitance parameter can guarantee electric capacity voltage constant on the output capacitance loop 3, so systematic steady state can think that capacitance voltage is a constant voltage source, the output capacitance voltage of stablizing output capacitance loop 3 is only relevant with the duty ratio of battery 6 voltages and switch transistor T 28, and it is irrelevant with inductance parameters, inductance parameters only influences ripple current, and this point and buck chopper device are similar.Especially, when duty ratio was 0, output capacitance voltage equated with cell voltage, and can realize infinitely boosting coefficient in theory, but objectively owing to consider that the saturated and major loop switching device of inductance etc. is all multifactor, stablizing duty ratio is the best to be not more than 70%.When the shared same inductance of boost chopper and buck chopper device, the current ripples coefficient is as long as press the design of buck chopper device, and the boost chopper ripple coefficient is necessarily less than the buck chopper coefficient.

Because topological structure of the present utility model circuit when charging, discharging electric batteries is all in running order, carries The high application efficiency of main circuit, new topological structure has reduced the quantity of components and parts, makes the installation dimension of product Protect conveniently, the utility model is compared with conventional art, the utility model be operated in boost chopper or Equivalent circuit and traditional circuit during the buck chopper device are in full accord, can reach identical on performance Effect. Because it is former to have saved six power diodes, one group of filter capacitor and a reactor etc. fully Material can reduce about 40% on the production cost. Because this topological structure is equal when charging, discharge In running order, so the application efficiency of main circuit doubles. Simultaneously owing to reduce by a cover main circuit Structure, production efficiency has also improved about 30%. When reducing equipment volume, make workload-adaptability Strengthen, reduced production cost, for the intensive production of enterprise provides technical guarantee.

Claims

1. but reversed charge-inverter control device comprises interconnective successively AC power (1), commutation inversion bridge (2), output capacitance loop (3), accumulator (5) and battery (6); It is characterized in that: between described accumulator (5) and battery (6), be provided with buck-boost converter (4).

2. but reversed charge according to claim 1-inverter control device, it is characterized in that: described buck-boost converter (4) is made up of T27 and two insulated gate bipolar pipes of T28, the collector electrode of T27 is connected with described output capacitance loop (3) is anodal, the T27 emitting stage is connected with the collector electrode of T28, the emitter of T28 is connected with output capacitance loop (3) negative pole, and the emitter of T27 is connected with described accumulator (5).