阅读说明：本技术 一种双向隔离数字变换器 (Bidirectional isolation digital converter ) 是由 李酉 王晶晶 于 2020-12-11 设计创作，主要内容包括：本申请提供的一种双向隔离数字变换器,包括：原边数字控制器、副边数字控制器、隔离电路、隔离变压器、输入电压采样电路、输出电压采样电路、双向电流采样电路、输入功率驱动电路、输出功率驱动电路、原边驱动电路以及副边驱动电路,本申请实施例通过采用原边数字控制器和副边数字控制器,且在原边数字控制器和副边数字控制器之间设置隔离电路和隔离变压器,能够实现输入到输出的功率输出,也能实现输出到输入的功率输出；另外,通过设置隔离装置,可以实现应用于大功率或者容易产生火花的场合,满足用户的需求。(The application provides a two-way isolation digital converter, includes: the device comprises a primary side digital controller, a secondary side digital controller, an isolation circuit, an isolation transformer, an input voltage sampling circuit, an output voltage sampling circuit, a bidirectional current sampling circuit, an input power driving circuit, an output power driving circuit, a primary side driving circuit and a secondary side driving circuit, wherein the primary side digital controller and the secondary side digital controller are adopted, and the isolation circuit and the isolation transformer are arranged between the primary side digital controller and the secondary side digital controller, so that the power output from input to output can be realized, and the power output from the input to the output can also be realized; in addition, by arranging the isolating device, the device can be applied to occasions with high power or easy spark generation, and the requirements of users are met.)

1. A bi-directional isolated digital converter, comprising: primary side digital controller, secondary side digital controller, isolating circuit, isolation transformer, input voltage sampling circuit, output voltage sampling circuit, two-way current sampling circuit, input power drive circuit, output power drive circuit, primary side drive circuit and secondary side drive circuit, wherein:

the first end of the primary side digital controller is connected with the first end of the isolation circuit, the second end of the primary side digital controller is connected with the first end of the primary side driving circuit, the third end of the primary side digital controller is connected with the first end of the input voltage sampling circuit, and the fourth end of the primary side digital controller is connected with the first end of the bidirectional current sampling circuit;

the second end of the input voltage sampling circuit is connected with the first end of the input power driving circuit, the second end of the primary side driving circuit is connected with the second end of the input power driving circuit, the third end of the input power driving circuit is connected with the second end of the bidirectional current sampling circuit, and the fourth end of the input power driving circuit is connected with the first end of the isolation transformer; the third end of the bidirectional current sampling circuit is connected with the second end of the isolation transformer;

the third end and the fourth end of the isolation transformer are respectively connected with the first end and the second end of the output power drive circuit, the third end of the output power drive circuit is connected with the first end of the secondary side drive circuit, the fourth end of the output power drive circuit is connected with the first end of the output voltage sampling circuit, and the second end of the output voltage sampling circuit is connected with the first end of the secondary side digital controller;

the second end of the secondary side digital controller is connected with the second end of the isolation circuit, and the second end of the secondary side driving circuit is connected with the third end of the isolation circuit;

the primary side digital controller determines the direction of power conversion according to the current direction acquired by the bidirectional current sampling circuit;

if the direction of power conversion is from the primary side to the secondary side, the secondary side digital controller is responsible for sampling output voltage and calculating according to an internal digital loop to obtain a loop compensation signal, and the loop compensation signal is transmitted to the primary side digital controller through the isolation circuit; the primary side digital controller acquires the loop compensation signal, calculates a primary side driving signal of the current conduction duty ratio or switching frequency according to the loop compensation signal and a switching period, and transmits the primary side driving signal to the primary side driving circuit and the secondary side driving circuit for power transmission;

and if the direction of power conversion is from the secondary side to the primary side, the primary side digital controller is responsible for sampling input voltage and calculating according to an internal digital loop to obtain a loop compensation signal, calculating a current primary side driving signal of a conduction duty ratio or a switching frequency according to the loop compensation signal and a switching period, and transmitting the primary side driving signal to the primary side driving circuit for power transmission.

2. The bi-directional isolation digital converter of claim 1, wherein the primary side digital controller is a DSP controller, an MCU controller or a DSC controller.

3. The bi-directional isolation digital converter of claim 1, wherein the secondary side digital controller is a DSP controller, an MCU controller or a DSC controller.

4. The bi-directional isolation digital converter of claim 1, wherein the digital loop is PID, 2P2Z, 3P3Z, or 4P 4Z.

Technical Field

The present application relates to the field of power electronics, and more particularly, to a bidirectional isolation digital converter.

Background

With the development of micro-grid technology and energy storage technology, research on the technology of bidirectional converters is receiving wide attention, the bidirectional converters can be used for bidirectional conversion of alternating current voltage and direct current voltage, and energy can flow in two directions at the input end and the output end of the converters.

Most of the existing bidirectional converters are not provided with an isolating device, and the bidirectional converters are not suitable for occasions with high power or easy spark generation and cannot meet the requirements of users.

Disclosure of Invention

The application provides a bidirectional isolation digital converter, which is applied to occasions with high power or easily generated sparks by arranging an isolation device, and meets the requirements of users.

In order to achieve the above object, the present application provides the following technical solutions:

a bidirectional isolating digital converter comprising: primary side digital controller, secondary side digital controller, isolating circuit, isolation transformer, input voltage sampling circuit, output voltage sampling circuit, two-way current sampling circuit, input power drive circuit, output power drive circuit, primary side drive circuit and secondary side drive circuit, wherein:

the first end of the primary side digital controller is connected with the first end of the isolation circuit, the second end of the primary side digital controller is connected with the first end of the primary side driving circuit, the third end of the primary side digital controller is connected with the first end of the input voltage sampling circuit, and the fourth end of the primary side digital controller is connected with the first end of the bidirectional current sampling circuit;

the second end of the input voltage sampling circuit is connected with the first end of the input power driving circuit, the second end of the primary side driving circuit is connected with the second end of the input power driving circuit, the third end of the input power driving circuit is connected with the second end of the bidirectional current sampling circuit, and the fourth end of the input power driving circuit is connected with the first end of the isolation transformer; the third end of the bidirectional current sampling circuit is connected with the second end of the isolation transformer;

the third end and the fourth end of the isolation transformer are respectively connected with the first end and the second end of the output power drive circuit, the third end of the output power drive circuit is connected with the first end of the secondary side drive circuit, the fourth end of the output power drive circuit is connected with the first end of the output voltage sampling circuit, and the second end of the output voltage sampling circuit is connected with the first end of the secondary side digital controller;

the second end of the secondary side digital controller is connected with the second end of the isolation circuit, and the second end of the secondary side driving circuit is connected with the third end of the isolation circuit;

the primary side digital controller determines the direction of power conversion according to the current direction acquired by the bidirectional current sampling circuit;

if the direction of power conversion is from the primary side to the secondary side, the secondary side digital controller is responsible for sampling output voltage and calculating according to an internal digital loop to obtain a loop compensation signal, and the loop compensation signal is transmitted to the primary side digital controller through the isolation circuit; the primary side digital controller acquires the loop compensation signal, calculates a primary side driving signal of the current conduction duty ratio or switching frequency according to the loop compensation signal and a switching period, and transmits the primary side driving signal to the primary side driving circuit and the secondary side driving circuit for power transmission;

and if the direction of power conversion is from the secondary side to the primary side, the primary side digital controller is responsible for sampling input voltage and calculating according to an internal digital loop to obtain a loop compensation signal, calculating a current primary side driving signal of a conduction duty ratio or a switching frequency according to the loop compensation signal and a switching period, and transmitting the primary side driving signal to the primary side driving circuit for power transmission.

Preferably, the primary side digital controller is a DSP controller, an MCU controller or a DSC controller.

Preferably, the secondary side digital controller is a DSP controller, an MCU controller or a DSC controller.

Preferably, the digital loop is PID, 2P2Z, 3P3Z or 4P 4Z.

The application provides a two-way isolation digital converter, includes: the power output device comprises a primary side digital controller, a secondary side digital controller, an isolation circuit, an isolation transformer, an input voltage sampling circuit, an output voltage sampling circuit, a bidirectional current sampling circuit, an input power driving circuit, an output power driving circuit, a primary side driving circuit and a secondary side driving circuit, wherein the primary side digital controller and the secondary side digital controller are adopted, and the isolation circuit and the isolation transformer are arranged between the primary side digital controller and the secondary side digital controller, so that the power output from input to output can be realized, and the power output from the input to the output can also be realized; in addition, by arranging the isolating device, the device can be applied to occasions with high power or easy spark generation, and the requirements of users are met.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic circuit block diagram of a bidirectional isolated digital converter provided in an embodiment of the present application;

fig. 2 is a schematic circuit signal flow diagram of a bidirectional isolated digital converter according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, a schematic block diagram of a bidirectional isolated digital converter according to an embodiment of the present application is shown. As shown in fig. 1, an embodiment of the present application provides a bidirectional isolation digital converter, including: primary side digital controller 1, secondary side digital controller 2, isolation circuit 3, isolation transformer 4, input voltage sampling circuit 5, output voltage sampling circuit 6, two-way current sampling circuit 7, input power drive circuit 8, output power drive circuit 9, primary side drive circuit 10 and secondary side drive circuit 11, wherein:

the first end of the primary side digital controller 1 is connected with the first end of the isolation circuit 3, the second end of the primary side digital controller 1 is connected with the first end of the primary side driving circuit 10, the third end of the primary side digital controller 1 is connected with the first end of the input voltage sampling circuit 5, and the fourth end of the primary side digital controller 1 is connected with the first end of the bidirectional current sampling circuit 7.

A second end of the input voltage sampling circuit 5 is connected with a first end of the input power driving circuit 8, a second end of the primary side driving circuit 10 is connected with a second end of the input power driving circuit 8, a third end of the input power driving circuit 9 is connected with a second end of the bidirectional current sampling circuit 7, and a fourth end of the input power driving circuit 9 is connected with a first end of the isolation transformer 4; and the third end of the bidirectional current sampling circuit 7 is connected with the second end of the isolation transformer 4.

The third end and the fourth end of the isolation transformer 4 are respectively connected with the first end and the second end of the output power driving circuit 9, the third end of the output power driving circuit 9 is connected with the first end of the secondary side driving circuit 11, the fourth end of the output power driving circuit 9 is connected with the first end of the output voltage sampling circuit 6, and the second end of the output voltage sampling circuit 6 is connected with the first end of the secondary side digital controller 2; and the second end of the secondary side digital controller 2 is connected with the second end of the isolation circuit 3, and the second end of the secondary side driving circuit 11 is connected with the third end of the isolation circuit 3.

Referring to fig. 2, a schematic circuit signal flow diagram of a bidirectional isolated digital converter according to an embodiment of the present application is provided. As shown in fig. 2, the primary side digital controller 1 determines the direction of power conversion according to the direction of the current collected by the bidirectional current sampling circuit 7; if the direction of power conversion is from the primary side to the secondary side, the secondary side digital controller 2 is responsible for sampling the output voltage and calculating according to an internal digital loop to obtain a loop compensation signal, and the loop compensation signal is transmitted to the primary side digital controller 1 through the isolation circuit 3; the primary side digital controller 1 obtains the loop compensation signal, calculates a primary side driving signal of a current conduction duty ratio or a switching frequency according to the loop compensation signal and a switching period, and transmits the primary side driving signal to the primary side driving circuit 10 and the secondary side driving circuit 11 for power transmission; if the direction of power conversion is from the secondary side to the primary side, the primary side digital controller 1 is responsible for sampling the input voltage and calculating according to an internal digital loop to obtain a loop compensation signal, calculating a current primary side driving signal of a conduction duty ratio or a switching frequency according to the loop compensation signal and a switching period, and transmitting the primary side driving signal to the primary side driving circuit 10 for power transmission.

It should be noted that, in the embodiment of the present application, the primary side digital controller 1 is a DSP controller, an MCU controller, or a DSC controller; the secondary side digital controller 2 is a DSP controller, an MCU controller or a DSC controller; the digital loop is PID, 2P2Z, 3P3Z, or 4P 4Z.

The embodiment of the application provides a two-way isolation digital converter, includes: the device comprises a primary side digital controller, a secondary side digital controller, an isolation circuit, an isolation transformer, an input voltage sampling circuit, an output voltage sampling circuit, a bidirectional current sampling circuit, an input power driving circuit, an output power driving circuit, a primary side driving circuit and a secondary side driving circuit, wherein the primary side digital controller and the secondary side digital controller are adopted, and the isolation circuit and the isolation transformer are arranged between the primary side digital controller and the secondary side digital controller, so that the power output from input to output can be realized, and the power output from the input to the output can also be realized; in addition, by arranging the isolating device, the device can be applied to occasions with high power or easy spark generation, and the requirements of users are met.

It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.