阅读说明：本技术 一种增程器专用的电机控制器控制方法 (Control method of motor controller special for range extender ) 是由 赵鹏飞 舒涌 赖发东 李田 于 2020-06-15 设计创作，主要内容包括：本发明公开了一种增程器专用的电机控制器控制方法,包括以下步骤：S1、建立基于增程器电机转子的旋转坐标系；S2、通过显示查找表得到S1中旋转坐标系中的d轴与q轴的参考电流；S3、q轴的参考电流依次通过限幅、q轴电流叠加修正、交轴电流控制器及反馈处理之后输出交轴电压；d轴的参考电流依次通过限幅、d轴电流叠加修正、交轴电流控制器及反馈处理之后输出直轴电压。通过多维表格的查表技术(LUT)和通过电压反馈调节这两种方法的综合,实现了电机的深度弱磁控制的功能。(The invention discloses a control method of a special motor controller for a range extender, which comprises the following steps: s1, establishing a rotating coordinate system based on the range extender motor rotor; s2, obtaining reference currents of a d axis and a q axis in the rotating coordinate system in the S1 through a display lookup table; s3, outputting quadrature axis voltage after the reference current of the q axis sequentially passes through amplitude limiting, q axis current superposition correction, a quadrature axis current controller and feedback processing; and the reference current of the d axis outputs direct axis voltage after sequentially carrying out amplitude limiting, d axis current superposition correction, quadrature axis current controller and feedback processing. The function of the deep weak magnetic control of the motor is realized through the combination of a multi-dimensional table look-up table (LUT) technology and a voltage feedback regulation method.)

1. A control method of a motor controller special for a range extender is characterized by comprising the following steps:

s1, establishing a rotating coordinate system based on the range extender motor rotor;

s2, obtaining reference currents of a d axis and a q axis in the rotating coordinate system in the S1 through a display lookup table;

s3, outputting quadrature axis voltage after the reference current of the q axis sequentially passes through amplitude limiting, q axis current superposition correction, a quadrature axis current controller and feedback processing; and the reference current of the d axis outputs direct axis voltage after sequentially carrying out amplitude limiting, d axis current superposition correction, quadrature axis current controller and feedback processing.

2. The method for controlling the motor controller special for the range extender according to claim 1, wherein the voltage feedback processing method comprises the following steps:

a1, calculating to obtain voltage under a rotating coordinate system through quadrature axis output voltage and direct axis output voltage;

and A2, correcting the voltage under the rotating coordinate system through the direct-current voltage, enabling the voltage under the rotating coordinate system to sequentially pass through a low-pass filter, a flux-weakening PI controller and an amplitude limiting, and correcting the d-axis current reference value and the q-axis current reference value respectively.

3. The method for controlling the motor controller dedicated for the range extender according to claim 1 or 2, wherein the voltage under the rotating coordinate system

Technical Field

The invention relates to the technical field of range extenders, in particular to a control method of a motor controller special for a range extender.

Background

The extended range electric vehicle can achieve all power performances under a pure electric mode, and when the vehicle-mounted rechargeable energy storage system cannot meet the requirement of the endurance mileage, the vehicle-mounted auxiliary power supply is turned on to provide electric energy for the power system so as to prolong the endurance mileage.

The motor controller is used for controlling the running state of a point motor and plays an important role in a range extender, and in the motor controller control method in the prior art, the reference currents of a d axis and a q axis of a motor rotor are directly given, so that the control accuracy of the motor is not high.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provides a motor controller control method special for a range extender.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a control method of a motor controller special for a range extender comprises the following steps:

s1, establishing a rotating coordinate system based on the range extender motor rotor;

s2, obtaining reference currents of a d axis and a q axis in the rotating coordinate system in the S1 through a display lookup table;

s3, outputting quadrature axis voltage after the reference current of the q axis sequentially passes through amplitude limiting, q axis current superposition correction, a quadrature axis current controller and feedback processing; and the reference current of the d axis outputs direct axis voltage after sequentially carrying out amplitude limiting, d axis current superposition correction, quadrature axis current controller and feedback processing.

In the technical scheme, a current instruction is input into a display lookup table, reference currents of a d axis and a q axis in a rotating coordinate system are obtained, the reference currents of the q axis are subjected to amplitude limiting processing through an amplitude limiting output module, then quadrature axis voltage is output through a quadrature axis current controller after correction and superposition of the q axis current, and the quadrature axis output voltage performs feedback correction on the q axis reference current; similarly, the reference current of the d axis is subjected to correction and superposition of the direct axis current, then the direct axis voltage is output through the direct axis current controller, and the direct axis reference current is subjected to feedback correction through the direct axis output voltage. The technology realizes the function of deep flux weakening control of the motor through the combination of a multi-dimensional table look-up table (LUT) technology and a voltage feedback regulation method.

Preferably, the voltage feedback processing method includes the steps of:

a1, calculating to obtain voltage under a rotating coordinate system through quadrature axis output voltage and direct axis output voltage;

and A2, correcting the voltage under the rotating coordinate system through the direct-current voltage, enabling the voltage under the rotating coordinate system to sequentially pass through a low-pass filter, a flux-weakening PI controller and an amplitude limiting, and correcting the d-axis current reference value and the q-axis current reference value respectively.

In the technical scheme, the low-pass filtering and the amplitude limiting processing remove system interference, and the precision of voltage feedback processing is improved.

Preferably, the voltage in the rotating coordinate system

Wherein u is_dFor the direct-axis output voltage u_qThe voltage is output for quadrature axis.

The invention has the beneficial effects that:

according to the invention, a current instruction is input into a display lookup table, reference currents of a d axis and a q axis in a rotating coordinate system are obtained, the reference current of the q axis is subjected to amplitude limiting processing through an amplitude limiting output module, then a quadrature axis voltage is output through a quadrature axis current controller after the q axis current is corrected and superposed, and the quadrature axis output voltage performs feedback correction on the q axis reference current; similarly, the reference current of the d axis is subjected to correction and superposition of the direct axis current, then the direct axis voltage is output through the direct axis current controller, and the direct axis reference current is subjected to feedback correction through the direct axis output voltage. The technology realizes the function of deep flux weakening control of the motor through the combination of a multi-dimensional table look-up table (LUT) technology and a voltage feedback regulation method.

Drawings

FIG. 1 is a schematic diagram of a control method of a motor controller dedicated to a range extender of the present invention;

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

As shown in fig. 1, the method for controlling a dedicated motor controller for a range extender of this embodiment includes the following steps:

s1, establishing a rotating coordinate system based on the range extender motor rotor;

s2, obtaining reference currents of a d axis and a q axis in the rotating coordinate system in the S1 through a display lookup table;

s3, outputting quadrature axis voltage after the reference current of the q axis sequentially passes through amplitude limiting, q axis current superposition correction, a quadrature axis current controller and feedback processing; and the reference current of the d axis outputs direct axis voltage after sequentially carrying out amplitude limiting, d axis current superposition correction, quadrature axis current controller and feedback processing.

In this embodiment, the voltage feedback processing method includes the following steps:

a1, calculating to obtain voltage under a rotating coordinate system through quadrature axis output voltage and direct axis output voltage;

and A2, correcting the voltage under the rotating coordinate system through the direct-current voltage, enabling the voltage under the rotating coordinate system to sequentially pass through a low-pass filter, a flux-weakening PI controller and an amplitude limiting, and correcting the d-axis current reference value and the q-axis current reference value respectively.

In this embodiment, the voltage under the rotating coordinate systemWherein u is_dFor the direct-axis output voltage u_qThe voltage is output for quadrature axis.

In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Simple substitutions without changing the inventive content of the present invention are considered to be the same. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. 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 invention. Thus, the present invention 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.