CN206389166U - An integrated electric vehicle charging device - Google Patents

Abstract

The utility model provides an integral electric vehicle charging equipment has the input stage circuit of connecting market and the output stage circuit of jointing equipment, its characterized in that: the transformer circuit comprises a transformer, a primary stage of the transformer is connected to the input stage circuit through the pre-chopper circuit, a secondary stage of the transformer is connected to the output stage circuit through the rectifier circuit, the pre-chopper circuit is divided into three paths corresponding to a three-phase market, each path is controlled by the MCU to be switched on and off to realize chopping, and the MCU is provided with a plurality of sampling ends. The utility model provides a leading chopper, vary voltage, the integral type solution of phase shift output realize matching the voltage of output stage circuit, and the harmonic current noise in the stable and suppression electric wire netting of guarantee output is a technical, the practicality all shows excellent product, is fit for using widely.

Description

An integrated electric vehicle charging device

technical field

The utility model belongs to the electric vehicle charging technology, in particular to an integrated electric vehicle charging device.

Background technique

The function of electric vehicle charging equipment (charging pile) is similar to that of fuel dispensers in gas stations. It can be fixed on the ground or walls, and installed in public buildings (public buildings, shopping malls, public parking lots, etc.) and residential area parking lots or charging stations to realize Fast, efficient, safe and reasonable power supply to the power battery is the basic principle of electric vehicle charging equipment design. At the same time, the applicability and safety of the charger to various power batteries must also be considered.

The source-level part of the electric vehicle charging equipment needs to design a rectification and transformation circuit to achieve voltage matching with the output stage, and in order to ensure the stability of the charging output power and suppress the harmonic current noise in the power grid, the rectification and transformation circuit is required to be able to The three-phase current is processed by techniques such as chopping and rectification, and an integrated charging solution with chopping and voltage regulation functions is realized.

Utility model content

In order to solve the above technical requirements, the utility model proposes an integrated electric vehicle charging device, the specific technical content of which is as follows:

An integral electric vehicle charging device has an input stage circuit connected to the market and an output stage circuit connected to the device, which includes a pre-chopper circuit, a voltage transformer circuit, a rectifier circuit and a main control MCU. The voltage transformer circuit includes a transformer, The primary stage of the transformer is connected to the input stage circuit through the pre-chopper circuit, and the secondary stage of the transformer is connected to the output stage circuit through the rectification circuit. The pre-chopper circuit is divided into three circuits corresponding to the three-phase market, each The main control MCU is routed to control its on-off to realize chopping, and the main control MCU has several sampling terminals.

In one or more embodiments of the present utility model, the secondary stage of the transformer has multiple groups of taps, and the number of each group of taps is three. The rectification circuit has a plurality of rectification modules corresponding to each group of taps, and the input of each rectification module The terminal is connected to the tap of the corresponding group, and the output terminals of each rectification module are connected in series or in parallel.

In one or more embodiments of the present invention, the secondary stage of the transformer has at least a first group of taps (A1, B1, C1), a second group of taps (A2, B2, C2) and a third group of taps (A3 , B3, C3), there are some phase shifts between the taps of each group according to the number of coil turns connected.

In one or more embodiments of the present invention, the second group of taps (A2, B2, C2) has a phase shift of -7.5° relative to the first group of taps (A1, B1, C1), and the third group of taps (A2, B2, C2) have a -15° phase shift relative to the first set of taps (A1, B1, C1).

In one or more embodiments of the present invention, the sampling terminal of the main control MCU at least includes a first sampling terminal connected to the output stage circuit, and the sampling value of the first sampling terminal is used to adjust the chopping action.

The beneficial effects of the utility model are: providing an integrated solution of pre-chopping, voltage transformation, and phase-shifting output, realizing voltage matching of the output stage circuit, ensuring stable output power and suppressing harmonic current noise in the power grid. A product with excellent technical and practical performance, suitable for promotion and use.

Description of drawings

Fig. 1 is a functional block diagram of the integrated electric vehicle charging device of the present invention.

detailed description

The scheme of this application is further described in conjunction with accompanying drawing 1 as follows:

An integral electric vehicle charging device, which has an input stage circuit connected to the market (connected to the A-phase, B-phase, and C-phase mains) and an output stage circuit connected to the device (providing DC+, DC- output terminals), which includes the front A chopper circuit 1, a transformer circuit 2, a rectifier circuit 3 and a main control MCU 4 are provided. The transformer circuit 2 includes a transformer, and an existing multi-phase phase-shift transformer can be used. The primary stage of the transformer passes through the pre-chopper circuit. 1 is connected to the input stage circuit, the secondary stage of the transformer is connected to the output stage circuit through the rectifier circuit 3, the pre-chopper circuit 1 is divided into three circuits corresponding to the three-phase market, each circuit consists of a controllable switching device Ka , Kb, and Kc realize on-off control, and the control terminals of each controllable switching device Ka, Kb, and Kc are respectively connected to the main control MCU 4, and the main control MCU 4 includes at least the first sampling terminal connected to the output stage circuit 40. Adjust the chopping action of the pre-chopper circuit 1 according to the sampling value of the first sampling terminal 40.

The secondary stage of this transformer has multiple sets of taps, the first set of taps (A1, B1, C1), the second set of taps (A2, B2, C2) and the third set of taps (A3, B3, C3), each set of taps according to There are several phase shifts between the connected coil turns, the rectification circuit 3 has a plurality of rectification modules 31, 32, 33 corresponding to each group of taps, and the input ends of each rectification module 31, 32, 33 are connected to the corresponding group of taps, The output terminals of each rectification module are connected in series or in parallel.

In this embodiment, the second group of taps (A2, B2, C2) has a -7.5° phase shift relative to the first group of taps (A1, B1, C1), and the third group of taps (A2, B2, C2) There is a -15° phase shift relative to the first set of taps (A1, B1, C1).

The above-mentioned preferred implementation mode should be regarded as an illustration of the implementation mode of the scheme of this application, and any technical deduction, replacement, improvement, etc. that are similar to, similar to, or based on the scheme of this application should be regarded as the scope of protection of this patent.

Claims (5)

1. a kind of whole electric motor car charging equipment, the output stage electricity of input stage circuit and connection equipment with connection market Road, it is characterised in that：Including preposition chopper circuit, transforming circuit, rectification circuit and main control MCU, the transforming circuit includes transformation Device, the simple of transformer is connected to the input stage circuit by the preposition chopper circuit, and the secondary level of transformer passes through the rectified current Road is connected to the output-stage circuit, and the preposition chopper circuit is divided into three tunnels in correspondence three-phase market, respectively route main control MCU control Its break-make realizes copped wave, and the main control MCU has some sampling ends.

2. whole electric motor car charging equipment according to claim 1, it is characterised in that：The secondary level of the transformer has many Group tap, every group of number of taps is three, and the rectification circuit has multiple rectification modules of correspondence each group tap, each rectification module Input connected with corresponding group of tap, be connected in series or in parallel connect between the output end of each rectification module.

3. whole electric motor car charging equipment according to claim 2, it is characterised in that：The secondary level of the transformer at least has There is first group of tap（A1、B1、C1）, second group of tap（A2、B2、C2）With the 3rd group of tap（A3、B3、C3）, each group tap root According to there being some phase shifts between connect coil turn.

4. whole electric motor car charging equipment according to claim 3, it is characterised in that：Second group of tap（A2、B2、 C2）With respect to first group of tap（A1、B1、C1）There are -7.5 ° of phase shifts, the 3rd group of tap（A2、B2、C2）Taken out with respect to this first group Head（A1、B1、C1）There are -15 ° of phase shifts.

5. the whole electric motor car charging equipment according to claim 1-4 any one, it is characterised in that：The main control MCU Sampling end at least include being connected to the first sampling end of the output-stage circuit, adjusted by the sampled value of first sampling end before this Put the copped wave action of chopper circuit.