CN202634360U - Hybrid power control system based on synchronous rectification Buck-Boost bidirectional DC/DC converter - Google Patents

Hybrid power control system based on synchronous rectification Buck-Boost bidirectional DC/DC converter Download PDF

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Publication number
CN202634360U
CN202634360U CN 201220167949 CN201220167949U CN202634360U CN 202634360 U CN202634360 U CN 202634360U CN 201220167949 CN201220167949 CN 201220167949 CN 201220167949 U CN201220167949 U CN 201220167949U CN 202634360 U CN202634360 U CN 202634360U
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converter
storage battery
super capacitor
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way
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尹小梅
王�锋
陈钢
曹秉刚
王丽平
陈林
李进
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Suzhou Academy of Xian Jiaotong University
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Suzhou Academy of Xian Jiaotong University
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Abstract

The utility model discloses a hybrid power control system based on a synchronous rectification Buck-Boost bidirectional DC/DC converter, comprising a motor, a motor controller which is connected with the motor, a storage battery and a super capacitor, wherein the storage battery and the super capacitor are respectively connected with the motor controller; the storage battery accesses to the motor controller after being connected with a power switch; the super capacitor accesses to the motor controller after being connected with a bidirectional DC/DC converter; the power switch comprises two parallel P channel MOS pipes; the DC/DC converter comprises four N channel MOS pipes and an energy storage inductance; a half bridge structure is formed by every two of the four N channel MOS pipes; two ends of the energy storage inductance respectively access to the middle of two half bridge structures; the first half bridge is connected with one end of the power switch; the other end of the power switch is connected with one pole of the storage battery; the second half bridge is connected with the super capacitor in parallel; and the PWM pulse is added at the grid of the N channel MOS pipes of the converter. The hybrid power control system based on a synchronous rectification Buck-Boost bidirectional DC/DC converter not only can perform large power discharge and improve starting, accelerating and climbing performance of an electromobile and prolongs the service life of the storage battery, but also can perform large power charge and quickly recover the energy of regenerative braking of a vehicle and improve once charge driving range mileage of the electromobile.

Description

Composite supply control system based on the two-way DC/DC converter of synchronous rectification Buck-Boost
Technical field
The utility model relates to the vehicle power field of motor vehicle, relates to a kind of used for electric vehicle composite supply control system, relates in particular to a kind of composite supply control system based on the two-way DC/DC converter of synchronous rectification Buck-Boost.
Background technology
Along with rapid development of automobile industry, energy crisis and environmental crisis have become the most outstanding two principal themes of current society.Show that according to investigations the whole world has various types of vehicles year about 700,000,000 tons of fuel consumption at present, calculate that in this ratio the petroleum resources of containing in the present world only can keep 50~70 years; And the urban atmospheric pollution amount has 63% all from the toxic emission of fuel-engined vehicle.Therefore, under the pressure of these two big crises, electric automobile arises at the historic moment.
Yet the vehicle that electric vehicle accumulator property difference is caused once charges, and continual mileage is short, problems such as grade climbing performance difference and initialization cost height are quickened in starting, has become the fast-developing basic factor of restriction electric automobile.Research and development high-energy-density, high-specific-power, the inevitable requirement that the speed that discharges and recharges is fast, vehicle power that have extended cycle life becomes era development.But under the prior art condition, any single energy all can not satisfy the requirement of high-energy-density and high-specific-power simultaneously.So abroad just have the expert to propose the notion of composite power source, that is: the energy of high-energy-density being combined with the energy of high-specific-power becomes vehicle power jointly, wherein super capacitor+storage battery hybrid power system is one of future studies hot topic.
Aspect existing theory and technology; The patent No. is that 200810018098.8 " a kind of electric motor cycle super capacitance and accumulator composite supply control system " and number of patent application are the topological structure that 20102068944.8 " a kind of electric automobile hybrid power control system based on super capacitor " provided a kind of composite supply control system; The two all is with parallelly connected with storage battery again after two-way DC/DC converter is connected, for motor drive control device provides power source with super capacitor.Wherein, two-way DC/DC converter carries out rational matching to storage battery and super capacitor voltage between the two in system, with driving and the brake request that satisfies motor.But this two-way DC/DC converter can only carry out boost charge and step-down discharge to super capacitor; At this moment super capacitor is operated in high pressure mode; Make that part of energy when the super capacitor terminal voltage is low be not fully utilized, thereby weakened the driving force of super capacitor.
A kind of in addition comparatively common control method and above-mentioned two pieces of patents have same topological structure, and are parallelly connected with storage battery again after being about to super capacitor and two-way DC/DC converter being connected, for motor drive control device provides power source.But used here two-way DC/DC converter can only carry out the step-down charging and the discharge of boosting to super capacitor; Super capacitor is operated in low-voltage; Make when counter electromotive force of motor is low; Can't charge to super capacitor, its energy recovery efficiency is low, has weakened the regenerative braking ability of super capacitor.
The utility model content
The utility model purpose is to provide a kind of composite supply control system based on the two-way DC/DC converter of synchronous rectification Buck-Boost; The utility model not only can carry out high power discharge; Improve electric automobile starting, acceleration, grade climbing performance, prolong storage battery useful life; Can also carry out high-power charging, the energy when reclaiming the vehicle regenerative braking fast, the once charging continual mileage of raising electric automobile.
In order to solve these problems of the prior art, the technical scheme that the utility model provides is:
A kind of composite supply control system based on the two-way DC/DC converter of synchronous rectification Buck-Boost; Comprise motor, the electric machine controller that links to each other with motor and the storage battery that links to each other respectively with electric machine controller, super capacitor, storage battery inserts electric machine controller in the back that links to each other with power switch, inserts electric machine controller after super capacitor links to each other with two-way DC/DC converter; Said power switch comprises two P channel MOS tubes of parallel connection; Two-way DC/DC converter comprises four N-channel MOS pipes and an energy storage inductor, and four N-channel MOS pipes are formed half-bridge structure in twos, and the two ends of energy storage inductor are connected to the centre of two half-bridge structures respectively; Wherein first half-bridge links to each other with an end of power switch; The other end of power switch extremely links to each other with one of storage battery, and another of the other end of first half-bridge and storage battery extremely links to each other, and another utmost point of storage battery extremely links to each other with one of super capacitor; Second half-bridge is parallelly connected with super capacitor, and pwm pulse is added in the grid of converter N-channel MOS pipe.
Detailed technical scheme is: a kind of composite supply control system based on the two-way DC/DC converter of synchronous rectification Buck-Boost; Comprise motor, the electric machine controller that links to each other with motor and the storage battery that links to each other respectively with electric machine controller, super capacitor, storage battery inserts electric machine controller in the back that links to each other with power switch, inserts electric machine controller after super capacitor links to each other with two-way DC/DC converter; Said power switch comprises two P channel MOS tubes of parallel connection; Two-way DC/DC converter comprises four N-channel MOS pipes and an energy storage inductor, and four N-channel MOS pipes are formed half-bridge structure in twos, and the two ends of energy storage inductor are connected to the centre of two half-bridge structures respectively; Wherein first half-bridge links to each other with an end of power switch; The other end of power switch extremely links to each other with one of storage battery, and another of the other end of first half-bridge and storage battery extremely links to each other, and another utmost point of storage battery extremely links to each other with one of super capacitor; Second half-bridge is parallelly connected with super capacitor; Pwm pulse is added in the grid of converter N-channel MOS pipe, and said electric machine controller is the three phase full bridge inverter circuit, an end of three phase full bridge inverter circuit through with extremely link to each other with one of storage battery after power switch is connected; One end of three phase full bridge inverter circuit also links to each other with an end of first half-bridge, and another of the other end of the other end of three phase full bridge inverter circuit and first half-bridge, storage battery extremely links to each other.
For technique scheme, the utility model also has additional alternative scheme to it.
As replenishing, four N-channel MOS pipe available horsepower transistors in the said two-way DC/DC converter substitute, and pwm pulse is added in the power transistor base stage.
As replenishing, four available insulated gate bipolar transistors of N-channel MOS pipe in the said two-way DC/DC converter substitute, and pwm pulse is added in the grid of insulated gate bipolar transistor.
Four available SPMs of N-channel MOS pipe as replenishing in the said two-way DC/DC converter substitute, and pwm pulse is added in the drive controlling input pin of merit SPM.
With respect to scheme of the prior art, the utility model has the advantages that:
The described composite supply control system of the utility model based on the two-way DC/DC converter of synchronous rectification Buck-Boost; Making super capacitor carry out buck according to the actual requirements on the one hand discharges and recharges; But not single boost charge, step-down discharge or step-down are charged, the discharge of boosting; Guarantee super capacitor no matter be can both operate as normal under high-end voltage status or low side voltage status; Improve the capacity usage ratio of super capacitor, helped to improve the power performance of motor vehicle, prolonged its continual mileage that once charges; On the other hand and since this two-way DC/DC converter using the working method of synchronous rectification, can effectively reduce the degree of heat of metal-oxide-semiconductor, improve the controller heating problem; Again on the one hand; This two-way DC/DC converter utilizes the metal-oxide-semiconductor of low on-resistance to replace the fly-wheel diode in original Buck buck circuit and the Boost boost chopper; Reduce the power consumption of controller effectively, improved the operating efficiency of control system.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Fig. 1 is the overall construction drawing of composite supply control system among the utility model embodiment;
Fig. 2 is the circuit diagram of composite supply control system major loop among the utility model embodiment;
Fig. 3 is the principle schematic of control system under the independent energy supply driving of the storage battery situation among the utility model embodiment;
Fig. 4 is the principle schematic that the independent energy supply of storage battery drove and gave control system under the super capacitor charge condition among the utility model embodiment;
Fig. 5 is the principle schematic of control system under storage battery and the super capacitor energy supply simultaneously driving situation among the utility model embodiment;
Fig. 6 is preferably the principle schematic of control system under the super capacitor charge condition for motor among the utility model embodiment;
Fig. 7 is the principle schematic of control system under the charge in batteries situation for motor among the utility model embodiment;
Fig. 8 is a circuit working schematic diagram under the independent energy supply driving of the storage battery situation among the utility model embodiment;
Fig. 9 is that the independent energy supply of storage battery drives and give circuit working schematic diagram under the super capacitor charge condition among the utility model embodiment;
Figure 10 be among the utility model embodiment the energy supply driving simultaneously of storage battery and super capacitor and super capacitor terminal voltage greater than circuit working schematic diagram under the situation of the required electromotive force of motor;
Figure 11 be among the utility model embodiment the energy supply driving simultaneously of storage battery and super capacitor and super capacitor terminal voltage less than circuit working schematic diagram under the situation of the required electromotive force of motor;
Figure 12 is preferably circuit working schematic diagram under the situation of the back electromotive force that super capacitor charging and super capacitor terminal voltage produce greater than motor for motor among the utility model embodiment;
Figure 13 is preferably circuit working schematic diagram under the situation of the back electromotive force that super capacitor charging and super capacitor terminal voltage produce less than motor for motor among the utility model embodiment;
Figure 14 is circuit working schematic diagram under the situation of charge in batteries for motor among the utility model embodiment.
Embodiment
Below in conjunction with specific embodiment such scheme is further specified.Should be understood that these embodiment are used to the utility model is described and the scope that is not limited to limit the utility model.The implementation condition that adopts among the embodiment can be done further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in the normal experiment.
Embodiment:
Present embodiment has been described a kind of composite supply control system based on the two-way DC/DC converter of synchronous rectification Buck-Boost; Its overall structure is as shown in Figure 1; Comprise motor, the electric machine controller that links to each other with motor and the storage battery that links to each other respectively with electric machine controller, super capacitor; Storage battery inserts electric machine controller in the back that links to each other with power switch, inserts electric machine controller after super capacitor links to each other with two-way DC/DC converter.
The circuit theory diagrams of the major loop of the composite supply control system of present embodiment are as shown in Figure 2; Said power switch comprises two the P channel MOS tube T11 and the T12 of parallel connection; Two-way DC/DC converter comprises four N-channel MOS pipe T7, T8, T9, T10 and an energy storage inductor L, and T7 and T8, T9 and T10 form half-bridge structure respectively in twos, and the two ends of energy storage inductor L are connected to the centre of two half-bridge structures respectively; Wherein T9 links to each other with the end of power switch S with first half-bridge that T10 forms; The other end of power switch S links to each other with the positive pole of storage battery, and the other end of first half-bridge links to each other with the negative pole of storage battery, and the negative pole of storage battery extremely links to each other with one of super capacitor; T7 is parallelly connected with super capacitor CM with second half-bridge that T8 forms, and pwm pulse is added in the grid of the N-channel MOS pipe of two-way DC/DC converter.
The motor that is adopted in the present embodiment is a permanent-magnet brushless DC electric machine; Said electric machine controller is the three phase full bridge inverter circuit; The three phase full bridge inverter circuit is made up of six power device metal-oxide-semiconductors; Wherein metal-oxide-semiconductor T1 and T2, metal-oxide-semiconductor T3 and T4, metal-oxide-semiconductor T5 and T6 form the driving half-bridge respectively, constitute three phase inverter bridge, and the centre of metal-oxide-semiconductor T1 and T2, metal-oxide-semiconductor T3 and T4, metal-oxide-semiconductor T5 and T6 is connected respectively at three phase winding A, B, the C of motor.One end of three phase full bridge inverter circuit through with extremely link to each other with one of storage battery after power switch is connected; One end of three phase full bridge inverter circuit also links to each other with an end of first half-bridge, and another of the other end of the other end of three phase full bridge inverter circuit and first half-bridge, storage battery extremely links to each other.
Vehicle is under the cruising operating mode, and power supply is with the drive motors operate as normal separately for storage battery, and the operation principle of the control system of this moment is as shown in Figure 3, and the circuit working schematic diagram of this moment is as shown in Figure 8.At this moment, T1 is in the PWM modulation condition, the T4 conducting, and S is closed, and other power tube ends.System's major loop works in the step-down drive pattern of typical brshless DC motor: when T1 was 1, the energy of storage battery was through armature winding A, the B drive motors of T1 and motor, and loop A, B utilize self inductance to store part energy; When T1 was 0, loop A, the stored energy process sustained diode 2 composition closed-loop paths of B released energy.
When the super capacitor electric weight is not enough; Storage battery also will fill part energy to super capacitor in the powered motor separately; So that keep super capacitor to possess certain fan-out capability, then storage battery is also carrying out the step-down driving to super capacitor in the powered motor separately.The operation principle of the control system of this moment is as shown in Figure 4, and the circuit working schematic diagram of this moment is as shown in Figure 9.At this moment, T1 is in the PWM modulation condition, and T9 and T10 are in the synchronous rectification state, T4 and T7 conducting, and S is closed, and other power tube ends.Through modulation T1, storage battery carries out step-down through the three phase full bridge inverter circuit to motor and drives; Through synchronous rectification T9 and T10, storage battery carries out the step-down charging to super capacitor: when T9 was 1, T10 was 0, and the stored energy of storage battery charges to super capacitor through T9, inductance L, and inductance L stores part energy; When T9 was 0, T10 was 1, and the inductance L energy stored is charged to super capacitor through T10.
Vehicle is under starting acceleration or climbing operating mode; The required drive current of system is bigger; This moment, super capacitor was through two-way DC/DC converter and storage battery parallel connection drive motors; The operation principle of its control system is as shown in Figure 3, but this moment, two-way DC/DC converter worked in the comparison that boost mode or decompression mode depend on super capacitor terminal voltage and the required electromotive force of motor.
Energy supply driving simultaneously of storage battery and super capacitor and super capacitor terminal voltage are shown in figure 10 greater than circuit working principle under the situation of the required electromotive force of motor in the present embodiment.The super capacitor terminal voltage is greater than the required electromotive force of motor, and then super capacitor carries out the step-down driving to motor.At this moment, T1 is in the PWM modulation condition, and T7 and T8 are in the synchronous rectification state, T4 and T9 conducting, and S is closed, and other power tube ends.Through modulation T1, storage battery carries out step-down through the three phase full bridge inverter circuit to motor and drives; Through synchronous rectification T7 and T8, super capacitor carries out step-down to motor and drives: when T7 was 1, T8 was 0, and the stored energy of super capacitor outwards discharges through T7 and inductance L, and this moment, inductance L stored part energy; When T7 was 0, T8 was 1, and the inductance L energy stored is formed the closed-loop path discharge through T1, loop A, B and T8.
Energy supply driving simultaneously of storage battery and super capacitor and super capacitor terminal voltage are shown in figure 11 less than circuit working principle under the situation of the required electromotive force of motor in the present embodiment.The super capacitor terminal voltage is less than the required electromotive force of motor, and then super capacitor is to the motor driving of boosting.At this moment, T1 is in the PWM modulation condition, and T9 and T10 are in the synchronous rectification state, T4 and T7 conducting, and S is closed, and other power tube ends.Through modulation T1, storage battery carries out step-down through the three phase full bridge inverter circuit to motor and drives; Through synchronous rectification T9 and T10, super capacitor is to the motor driving of boosting: when T9 was 0, T10 was 1, and the stored energy of super capacitor has formed the closed-loop path through inductance L and T10, and this moment, inductance L stored part energy; When T9 was 1, T10 was 0, and the energy of super capacitor is together with the stored energy of the inductance L drive motors that outwards discharges.
In vehicle deceleration or when braking, motor is in the generator operating state, control system during with the vehicle regenerative braking energy give super capacitor through the power inverter priority feedback, after super capacitor was full of, remainder charged to storage battery again.
Motor is as shown in Figure 6 for the control system principle under the super capacitor charge condition, and the comparison of super capacitor terminal voltage and counter electromotive force of motor is depended in braking or step-down braking but system's major loop boosts.
Its main loop circuit operation principle is shown in figure 12 during the situation of the back electromotive force that produces greater than motor when the super capacitor terminal voltage, the back electromotive force that the super capacitor terminal voltage produces greater than motor, and then charge to super capacitor in the counter electromotive force of motor back of boosting.At this moment, T7 and T8 are in the synchronous rectification state, the T9 conducting, and S breaks off, and other power tube all ends.Through synchronous rectification T7 and T8, the energy of motor regenerative braking carries out boost charge to super capacitor: when T7 was 0, T8 was 1; Back electromotive force coils A, B that motor produces; Sustained diode 1, inductance L and T8 form the closed-loop path, and this moment, inductance L stored part energy; When T7 was 1, T8 was 0, and counter electromotive force of motor charges to super capacitor through T7 together with energy stored on the inductance L.
Its main loop circuit operation principle is shown in figure 13 during the situation of the back electromotive force that produces less than motor when the super capacitor terminal voltage.The super capacitor terminal voltage is then charged to super capacitor after the counter electromotive force of motor step-down less than the back electromotive force that motor produces.At this moment, T9 and T10 are in the synchronous rectification state, the T7 conducting, and S breaks off, and other power tube all ends.Through synchronous rectification T9 and T10; The energy of motor regenerative braking carries out the step-down charging to super capacitor: when T9 is 1; T10 is 0, and counter electromotive force of motor charges to super capacitor through sustained diode 1, T9 and inductance L, and this moment, inductance L stored part energy; When T9 was 0, T10 was 1, and the stored energy of inductance L charges to super capacitor through T10.
Motor is being that control system principle under the charge in batteries situation is as shown in Figure 7, and its major loop operation principle is shown in figure 14, and super capacitor has been filled to rated voltage, and then the energy that produces of regenerative braking utilizes self coil inductance that storage battery is carried out boost charge.T2 is in the PWM modulation condition, and S is closed, and other metal-oxide-semiconductor turn-offs.Through modulation T2, counter electromotive force of motor utilizes self inductance that storage battery is carried out boost charge: when T2 was 1, counter electromotive force of motor was through loop A, B, T2 and sustained diode 4 formation closed-loop paths, coil inductance energy storage this moment; When T2 was 0, counter electromotive force of motor formed the closed-loop path and charges a battery through sustained diode 1, D4 together with loop A, the stored energy of B.
Above-mentioned instance only is the technical conceive and the characteristics of explanation the utility model, and its purpose is to let the people who is familiar with this technology can understand content of the utility model and enforcement according to this, can not limit the protection range of the utility model with this.All equivalent transformation or modifications of being done according to the utility model spirit all should be encompassed within the protection range of the utility model.

Claims (5)

1. the composite supply control system based on the two-way DC/DC converter of synchronous rectification Buck-Boost comprises motor, the electric machine controller that links to each other with motor and the storage battery that links to each other respectively with electric machine controller, super capacitor, it is characterized in that; Storage battery inserts electric machine controller in the back that links to each other with power switch; Insert electric machine controller after super capacitor links to each other with two-way DC/DC converter, said power switch comprises two P channel MOS tubes of parallel connection, and two-way DC/DC converter comprises four N-channel MOS pipes and an energy storage inductor; Four N-channel MOS pipes are formed half-bridge structure in twos; The two ends of energy storage inductor are connected to the centre of two half-bridge structures respectively, and wherein first half-bridge links to each other with an end of power switch, and the other end of power switch extremely links to each other with one of storage battery; Another of the other end of first half-bridge and storage battery extremely links to each other; Another utmost point of storage battery extremely links to each other with one of super capacitor, and second half-bridge is parallelly connected with super capacitor, and pwm pulse is added in the grid of converter N-channel MOS pipe.
2. the composite supply control system based on the two-way DC/DC converter of synchronous rectification Buck-Boost according to claim 1; It is characterized in that; Four N-channel MOS pipe available horsepower transistors in the said two-way DC/DC converter substitute, and pwm pulse is added in the power transistor base stage.
3. the composite supply control system based on the two-way DC/DC converter of synchronous rectification Buck-Boost according to claim 1; It is characterized in that; Four available insulated gate bipolar transistors of N-channel MOS pipe in the said two-way DC/DC converter substitute, and pwm pulse is added in the grid of insulated gate bipolar transistor.
4. the composite supply control system based on the two-way DC/DC converter of synchronous rectification Buck-Boost according to claim 1; It is characterized in that; Four available SPMs of N-channel MOS pipe in the said two-way DC/DC converter substitute, and pwm pulse is added in the drive controlling input pin of merit SPM.
5. the composite supply control system based on the two-way DC/DC converter of synchronous rectification Buck-Boost according to claim 1; It is characterized in that; Said electric machine controller is the three phase full bridge inverter circuit; One end of three phase full bridge inverter circuit through with extremely link to each other with one of storage battery after power switch is connected, an end of three phase full bridge inverter circuit also links to each other with an end of first half-bridge, another of the other end of the other end of three phase full bridge inverter circuit and first half-bridge, storage battery extremely links to each other.
CN 201220167949 2012-04-19 2012-04-19 Hybrid power control system based on synchronous rectification Buck-Boost bidirectional DC/DC converter Expired - Fee Related CN202634360U (en)

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CN102647150A (en) * 2012-04-19 2012-08-22 西安交通大学苏州研究院 Compound power supply control system based on synchronous rectification Buck-Boost bidirectional DC (Direct Current)/DC (Direct Current) convertor
CN105609493A (en) * 2016-03-22 2016-05-25 富士电机(中国)有限公司 Eight-for-one IGBT (insulated gate bipolar transistor) module integrating bidirectional buck-boost functions
CN108859765A (en) * 2018-05-22 2018-11-23 江苏赛麟汽车科技有限公司 A kind of Novel motor controller low-tension supply electricity getting device
CN111049379A (en) * 2019-12-23 2020-04-21 广东工业大学 Charge-discharge type DC-DC conversion circuit and charge-discharge system thereof
US10771001B2 (en) 2015-09-11 2020-09-08 Invertedpower Pty Ltd Controller for an inductive load having one or more inductive windings
US11267358B2 (en) 2017-05-08 2022-03-08 Invertedpower Pty Ltd Vehicle charging station
US11479139B2 (en) 2015-09-11 2022-10-25 Invertedpower Pty Ltd Methods and systems for an integrated charging system for an electric vehicle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102647150A (en) * 2012-04-19 2012-08-22 西安交通大学苏州研究院 Compound power supply control system based on synchronous rectification Buck-Boost bidirectional DC (Direct Current)/DC (Direct Current) convertor
US10771001B2 (en) 2015-09-11 2020-09-08 Invertedpower Pty Ltd Controller for an inductive load having one or more inductive windings
US11479139B2 (en) 2015-09-11 2022-10-25 Invertedpower Pty Ltd Methods and systems for an integrated charging system for an electric vehicle
CN105609493A (en) * 2016-03-22 2016-05-25 富士电机(中国)有限公司 Eight-for-one IGBT (insulated gate bipolar transistor) module integrating bidirectional buck-boost functions
US11267358B2 (en) 2017-05-08 2022-03-08 Invertedpower Pty Ltd Vehicle charging station
CN108859765A (en) * 2018-05-22 2018-11-23 江苏赛麟汽车科技有限公司 A kind of Novel motor controller low-tension supply electricity getting device
CN111049379A (en) * 2019-12-23 2020-04-21 广东工业大学 Charge-discharge type DC-DC conversion circuit and charge-discharge system thereof

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