CN201219239Y

CN201219239Y - Low power-input high-power-output start power supply

Info

Publication number: CN201219239Y
Application number: CNU2008200383672U
Authority: CN
Inventors: 马兰新
Original assignee: Tongzhi Science & Technology Developing Co Ltd Hefei City
Current assignee: HEFEI TONGZHI ELECTRICAL CONTROL TECHNOLOGY CO., LTD.
Priority date: 2008-06-18
Filing date: 2008-06-18
Publication date: 2009-04-08
Anticipated expiration: 2018-06-18

Abstract

The utility model discloses a start electrical source with low power input and high power output, which is object to resolve the starting up of field high power starting motor, specifically reliable starting up under low-temperature, and to resolve the defect of the prior vehicle-mounted accumulator starting up. The three-phase alternating current is connected to the input terminal of a full-bridge topology circuit through an AC-DC converter, the output of the full-bridge topology is connected to two taps of the primary coil of a transformer; the two taps of the primary coil of the transformer respectively thrill through a saturated magnetic bead, and then connect in series with an absorbent circuit composed by connecting a RC circuit and a diode in parallel, and then the two tap circuits are in mutual parallel connection; the parallel circuit is then connected in series with a filtering reactance, then connected to the anode of the output energy storage capacitor, and the cathode of the output energy storage capacitor is connected to the intermediate tap of the secondary coil of the transformer. The utility model has advantages of unrestricted starting number, large charge and discharge current, short charge and discharge time, low starting up temperature and maintenance free.

Description

A kind of small-power is imported high-power output startup power supply

Technical field

The utility model relates to the inverter field, and a kind of specifically small-power is imported high-power output startup power supply.

Background technology

Owing to do not have civil power in the open air, the mobile generator power output is restricted, and will reach 90KW and could start and the peak power of actuating motor has.Conventional method is with Vehicular accumulator cell starting, is to start at normal temperatures, but battery electric quantity just exhausts and needs accumulators to replenish electric weight after the starting several times, and the charge in batteries time is long; Because the restriction of domestic battery technology level, under low temperature condition vehicle-mounted accumulator property serious descend just can not satisfy started, had small-power to import the design of high-power output startup power supply in this case.

The utility model content

The purpose of this utility model provides a kind of small-power and imports high-power output startup power supply, and purpose mainly is starting, the particularly low temperature reliable starting down that solves open-air high-power actuating motor, solves the shortcoming that present Vehicular accumulator cell starts.

The technical solution of the utility model is as follows:

A kind of small-power is imported high-power output startup power supply, after it is characterized in that three-phase alternating current passes through AC-DC converter, the DC circuit two ends of output are parallel with filtering, the accumulator of resistance and electric capacity composition, be connected to the input of the full-bridge topological circuit of forming by 4 IGBT module Q1, Q2, Q3, Q4 then, the G utmost point and the E utmost point of each IGBT pipe are connected to control Driver Circuit, control the switch of each IGBT by control Driver Circuit, be parallel with resonant capacitance on the full-bridge topological circuit brachium pontis; A tap of the primary coil of transformer is connected to by the protective circuit of being made up of current transformer, capacitance, pulsactor between the C utmost point of the E utmost point of IGBT module Q3 of full-bridge topological circuit and IGBT module Q4, and another tap of the primary coil of transformer is connected between the C utmost point of the E utmost point of IGBT module Q1 of full-bridge topological circuit and IGBT module Q2; The two ends tap of the secondary coil of transformer is passed behind the absorption circuit that one of series connection behind the saturated magnetic bead is made of RC circuit and diode parallel connection parallel with one another more respectively; Back in parallel serial connection one filter reactance is connected to the positive pole of output storage capacitor, and the negative pole of output storage capacitor is connected on the centre tap of secondary coil of transformer

The utility model operation principle is as follows:

Three-phase 380V alternating current produces the 532V direct voltage through over commutation, filtering, and this direct voltage is reverse into high-frequency ac voltage through IGBT module and high frequency transformer again, then, produces the 48V/24V direct voltage through secondary commutation, filtering.

Technical characterstic of the present utility model is as follows:

Select for use super farad capacitor device in parallel as the output storage capacitor, super farad capacitor can also reach 80% of rated capacity at-50 ℃ of capacity of working at this moment down.

Traditional bipolarity control mode (promptly being operated in the hard switching state), because switching tube will bear very high peak current and voltage, switching loss and safety operation area require very big, so this method is not suitable for the high-power applications occasion.So the utility model adopts advanced finite both control ZVS-ZCS full-bridge topological circuit.This control method can make a pair of IGBT module realize that lossless shutoff promptly is operated in the ZCS state, another realizes that to the IGBT module thereby lossless opening promptly is operated in the ZVS state and greatly reduces switching loss, solved the critical problem in the large power inverter power source effectively.

Advantage of the present utility model has:

1, number of starts is unrestricted.The output storage capacitor big time of charging and discharging currents is short, does not resemble limited by the charging interval after battery electric quantity uses up.

2, cranking temperature is low, and the good temperature influence of the low-temperature characteristics of electric capacity is little, and battery capacity when low temperature reduces about 10% of capacity when much having only normal temperature.

Need not safeguard that 3, the electric capacity charging can be full of in the start back short time, need not to resemble storage battery and carried out charge maintenance.

Description of drawings

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

Embodiment

Referring to Fig. 1.

A kind of small-power is imported high-power output startup power supply, three-phase alternating current is by after the AC-DC converter, the direct current two ends of output are parallel with filtering, the accumulator of resistance and electric capacity composition, be connected to the input of the full-bridge topological circuit of forming by 4 IGBT module Q1, Q2, Q3, Q4 then, the G utmost point and the E utmost point of each IGBT pipe are connected to control Driver Circuit, control the switch of each IGBT by control Driver Circuit, be parallel with resonant capacitance on the full-bridge topological circuit brachium pontis; A tap of the primary coil of transformer is connected to by the protective circuit of being made up of current transformer, capacitance, pulsactor between the Q utmost point of the E utmost point of IGBT module Q3 of full-bridge topological circuit and IGBT module Q4, and another tap of the primary coil of transformer is connected between the Q utmost point of the E utmost point of IGBT module Q1 of full-bridge topological circuit and IGBT module Q2; The two ends tap of the secondary coil of transformer is passed behind the absorption circuit that one of series connection behind the saturated magnetic bead is made of RC circuit and diode parallel connection parallel with one another more respectively; Back in parallel serial connection one filter reactance is connected to the positive pole of output storage capacitor, and the negative pole of output storage capacitor is connected on the centre tap of secondary coil of transformer.

Claims

1. a small-power is imported high-power output startup power supply, after it is characterized in that three-phase alternating current passes through AC-DC converter, the DC circuit two ends of output are parallel with filtering, the accumulator of resistance and electric capacity composition, be connected to the input of the full-bridge topological circuit of forming by 4 IGBT module Q1, Q2, Q3, Q4 then, the G utmost point and the E utmost point of each IGBT pipe are connected to control Driver Circuit, control the switch of each IGBT by control Driver Circuit, be parallel with resonant capacitance on the full-bridge topological circuit brachium pontis; A tap of the primary coil of transformer is connected to by the protective circuit of being made up of current transformer, capacitance, pulsactor between the C utmost point of the E utmost point of IGBT module Q3 of full-bridge topological circuit and IGBT module Q4, and another tap of the primary coil of transformer is connected between the C utmost point of the E utmost point of IGBT module Q1 of full-bridge topological circuit and IGBT module Q2; The two ends tap of the secondary coil of transformer is passed behind the absorption circuit that one of series connection behind the saturated magnetic bead is made of RC circuit and diode parallel connection parallel with one another more respectively; Back in parallel serial connection one filter reactance is connected to the positive pole of output storage capacitor, and the negative pole of output storage capacitor is connected on the centre tap of secondary coil of transformer.