阅读说明：本技术 高精度旋转变压器控制解码系统及方法 (High-precision rotary transformer control decoding system and method ) 是由 宋树伟 冯伟 曾凡铨 牟筱宁 崔业兵 姚尧 顾大维 于戈 胡翔宇 叶伦宽 陈树恒 于 2020-12-04 设计创作，主要内容包括：本发明提供了一种高精度旋转变压器控制解码系统及方法,包括：二次电源电路(1)、双CPU电路(2)、通信接口电路(3)、永磁同步电机机构(4)、旋转变压器(5)、旋变解码电路(6)、激磁推挽放大电路(7)、信号调理采集电路(8)、传感器反馈电路(9)、功率驱动电路(10)以及伺服驱动器壳体和接插件单元(11)；本发明和传统的传统的同步电机位置、旋角检测采用脉冲编码器、光电编码器相比,旋转变压器因其温度范围宽且精度高、抗振动性能良好,能够很好的应用在恶劣工况下的伺服控制系统中。(The invention provides a high-precision rotary transformer control decoding system and a high-precision rotary transformer control decoding method, which comprise the following steps: the device comprises a secondary power circuit (1), a double-CPU circuit (2), a communication interface circuit (3), a permanent magnet synchronous motor mechanism (4), a rotary transformer (5), a rotary transformer decoding circuit (6), an excitation push-pull amplification circuit (7), a signal conditioning acquisition circuit (8), a sensor feedback circuit (9), a power driving circuit (10) and a servo driver shell and connector unit (11); compared with the traditional synchronous motor position and rotation angle detection adopting a pulse encoder and a photoelectric encoder, the rotary transformer has wide temperature range, high precision and good vibration resistance, and can be well applied to a servo control system under severe working conditions.)

1. A high accuracy resolver control decoding system, comprising: the device comprises a secondary power circuit (1), a double-CPU circuit (2), a communication interface circuit (3), a permanent magnet synchronous motor mechanism (4), a rotary transformer (5), a rotary transformer decoding circuit (6), an excitation push-pull amplification circuit (7), a signal conditioning acquisition circuit (8), a sensor feedback circuit (9), a power driving circuit (10) and a servo driver shell and connector unit (11);

the secondary power supply circuit (1) is connected with the communication interface circuit (3);

the double CPU circuit (2) is connected with the rotary transformer decoding circuit (6), the signal conditioning acquisition circuit (8) and the power driving circuit (10);

the rotary transformer decoding circuit (6) is connected with the rotary transformer (5);

the rotary transformer decoding circuit (6) is connected with an excitation push-pull amplifying circuit (7);

the rotary transformer (5) is connected with an excitation push-pull amplifying circuit (7);

the signal conditioning and acquisition circuit (8) is connected with the power driving circuit (10) and the sensor feedback circuit (9);

the permanent magnet synchronous motor mechanism (4) is connected with a power driving circuit (10).

2. The high accuracy resolver control decoding system according to claim 1, further comprising: a plurality of power modules;

the double CPU circuit (2) adopts a DSP + FPGA double CPU circuit;

the secondary power supply circuit (1) converts a 28VDC power supply into voltages required by a DSP + FPGA double CPU circuit (2), a communication interface circuit (3), a rotary transformer (5), a rotary transformer decoding circuit (6), an excitation push-pull amplifying circuit (7), a signal conditioning and collecting circuit (8), a sensor feedback circuit (9) and a power driving circuit (10) through a multi-path power supply module.

3. A high precision resolver control decoding system according to claim 1, wherein the communication interface circuit (3) communicates with the rocket machine, the ground system through 1553B bus or other communication protocol.

4. The high-precision rotary transformer control decoding system according to claim 2, wherein a double-CPU circuit of the DSP + FPGA receives the instruction sent by the arrow machine, and obtains the instruction information sent by the arrow machine.

5. The high-precision rotary transformer control decoding system according to claim 2, wherein the signal conditioning and acquiring circuit (8) acquires current and position signals of the permanent magnet synchronous motor mechanism (4).

6. A high precision resolver control decoding system according to claim 5, characterised in that the signal conditioning acquisition circuit (8) is able to drive the resolver (5) by excitation push-pull amplification circuit (7).

7. The high-precision rotary transformer control decoding system according to claim 6, wherein the signal conditioning acquisition circuit (8) is capable of acquiring sine and cosine outputs of the rotary transformer (5) through the rotary transformer decoding circuit (6) to obtain the accurate rotating speed of the permanent magnet synchronous motor mechanism (4).

8. The high-precision rotary transformer control decoding system according to claim 4, wherein according to the command information sent by the arrow machine, the double CPU circuit of the DSP + FPGA compares the command sent by the arrow machine with the feedback information of the current permanent magnet synchronous motor mechanism (4).

9. The high-precision rotary transformer control decoding system according to claim 8, wherein SVPWM signals are obtained through calculation of a control algorithm to control the power driving circuit (10).

10. A high-precision resolver control decoding method, characterized in that the high-precision resolver control decoding system according to any one of claims 1 to 9 is used to obtain the high-precision resolver control decoding result information.

Technical Field

The invention relates to the technical field of rotary transformer control decoding circuits, in particular to a high-precision rotary transformer control decoding system and method.

Background

The permanent magnet synchronous motor has been widely applied to the fields of national defense, automobiles, industry and the like due to the advantages of low power consumption, low efficiency, high response speed and the like, but the traditional synchronous motor adopts a pulse encoder and a photoelectric encoder for position and rotation angle detection, has weak interference resistance in application, depends on system parameters, and is limited in application in severe environment; the rotary transformer has wide temperature range, high precision and good vibration resistance, and can be well applied to a servo control system under severe working conditions.

The rotary transformer is a special two-phase rotary motor, which comprises a stator and a rotor, outputs two groups of sine and cosine differential signals after receiving an excitation signal, and a controller analyzes the relevant position information of the motor by receiving the two groups of signals and carrying out rotary transform decoding. In the prior art, most of decoding modes for rotating transformers are special integrated circuits, the precision is relatively low, and the space occupied by a printed board is large.

Patent document CN104613990B discloses a decoding system and method for dual rotary transformers, the system of the invention includes a first rotary transformer decoding circuit module, a second rotary transformer decoding circuit module and an embedded processor module; the input end of the first rotary transformer decoding circuit module is connected with the output end of a rotary transformer arranged on a first rotating shaft of the double-rotating-shaft equipment, and the input end of the second rotary transformer decoding circuit module is connected with the output end of a rotary transformer arranged on a second rotating shaft of the double-rotating-shaft equipment; the first rotary transformer decoding circuit module and the second rotary transformer decoding circuit module are connected with the embedded processor module through serial ports or parallel ports. The invention combines the rotary transformer decoding circuit module and the embedded processor to obtain the relative position information of two rotating shafts of the double-rotating-shaft equipment. There is still room for improvement in structure and performance.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a high-precision rotary transformer control decoding system and method.

According to the present invention, there is provided a high-precision resolver control decoding system, comprising: the device comprises a secondary power supply circuit 1, a double-CPU circuit 2, a communication interface circuit 3, a permanent magnet synchronous motor mechanism 4, a rotary transformer 5, a rotary transformer decoding circuit 6, an excitation push-pull amplifying circuit 7, a signal conditioning and collecting circuit 8, a sensor feedback circuit 9, a power driving circuit 10, a servo driver shell and a connector unit 11; the secondary power supply circuit 1 is connected with a communication interface circuit 3; the double CPU circuit 2 is connected with a rotary transformer decoding circuit 6, a signal conditioning acquisition circuit 8 and a power driving circuit 10; the rotary transformer decoding circuit 6 is connected with the rotary transformer 5; the rotary transformer decoding circuit 6 is connected with an excitation push-pull amplifying circuit 7; the rotary transformer 5 is connected with an excitation push-pull amplifying circuit 7; the signal conditioning and acquisition circuit 8 is connected with the power driving circuit 10 and the sensor feedback circuit 9; the permanent magnet synchronous motor mechanism 4 is connected with a power driving circuit 10.

Preferably, the method further comprises the following steps: a plurality of power modules; the double CPU circuit 2 adopts a DSP + FPGA double CPU circuit; the secondary power supply circuit 1 converts a 28VDC power supply into voltages required by a DSP + FPGA double CPU circuit 2, a communication interface circuit 3, a rotary transformer 5, a rotary transformer decoding circuit 6, an excitation push-pull amplifying circuit 7, a signal conditioning and collecting circuit 8, a sensor feedback circuit 9 and a power driving circuit 10 through a multi-path power supply module.

Preferably, the communication interface circuit 3 communicates with a rocket machine, a ground system, etc. via a 1553B bus or other communication protocol.

Preferably, a double-CPU circuit of the DSP + FPGA receives the instruction sent by the arrow machine, and obtains the instruction information sent by the arrow machine.

Preferably, the signal conditioning and acquiring circuit 8 acquires current and position signals of the permanent magnet synchronous motor mechanism 4.

Preferably, the signal conditioning and acquiring circuit 8 can drive the rotary transformer 5 through the excitation push-pull amplifying circuit 7.

Preferably, the signal conditioning and acquiring circuit 8 can acquire the sine and cosine output of the rotary transformer 5 through the rotary transformer decoding circuit 6 to obtain the accurate rotating speed of the permanent magnet synchronous motor mechanism 4.

Preferably, according to the instruction information sent by the arrow machine, the double-CPU circuit of the DSP + FPGA compares the instruction sent by the arrow machine with the feedback information of the current permanent magnet synchronous motor mechanism 4.

Preferably, the SVPWM signal is calculated by a control algorithm to control the power driving circuit 10.

Preferably, a high-precision rotary transformer control decoding system is adopted to obtain high-precision rotary transformer control decoding result information.

Compared with the prior art, the invention has the following beneficial effects:

1. compared with the traditional synchronous motor position and rotation angle detection adopting a pulse encoder and a photoelectric encoder, the rotary transformer has wide temperature range, high precision and good vibration resistance, and can be well applied to a servo control system under severe working conditions;

2. compared with the traditional permanent magnet synchronous motor position decoding control mode, the invention adopts the FPGA + DSP as the core control unit, optimizes and builds the rotary transformer decoding circuit, has high tracking precision, corresponding blocks, high integration degree, compact controller design and high servo precision;

3. the invention has reasonable structure and convenient use and can overcome the defects of the prior art.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a block diagram of a high-precision resolver control decoding circuit according to the present invention.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

A high-precision resolver control decoding circuit, as shown in fig. 1, mainly comprising: the device comprises a secondary power circuit 1, a DSP + FPGA double CPU circuit 2, a communication interface circuit 3, a permanent magnet synchronous motor mechanism 4, a rotary transformer 5, a rotary transformer decoding circuit 6, an excitation push-pull amplifying circuit 7, a signal conditioning and collecting circuit 8, a sensor feedback circuit 9, a power driving circuit 10, a servo driver shell and a connector 11.

The working principle is that the secondary power supply circuit 1 converts a 28VDC power supply into a double CPU circuit 2 of a DSP + FPGA through a multi-path power supply module, a communication interface circuit 3, a rotary transformer 5, a rotary transformer decoding circuit 6, an excitation push-pull amplifying circuit 7, a signal conditioning and collecting circuit 8, a sensor feedback circuit 9 and a voltage required by a power driving circuit 10; the communication interface circuit 3 of the servo driver is communicated with the rocket machine, a ground system and the like through a 1553B bus or other communication protocols, the DSP + FPGA double CPU circuit 2 receives an instruction sent by the rocket machine, the signal conditioning and acquisition circuit 8 acquires current and position signals of the permanent magnet synchronous motor mechanism 4, the excitation push-pull amplification circuit 7 drives the rotary transformer 5, the rotary transformer decoding circuit 6 acquires sine and cosine output of the rotary transformer 5 to obtain accurate rotating speed of the permanent magnet synchronous motor mechanism 4, the DSP + FPGA double CPU circuit 2 compares the instruction with feedback information of the current permanent magnet synchronous motor mechanism 4, and the SVPWM signal control power driving circuit 10 is obtained through calculation of a control algorithm, so that the permanent magnet synchronous motor mechanism is accurately controlled to move along with the instruction.

Specifically, in an embodiment, with reference to fig. 1, the invention is a high-precision resolver control decoding circuit, a secondary power circuit 1 converts a 28VDC power supply into a dual CPU circuit 2 of a DSP + FPGA through a multi-path power module, a communication interface circuit 3, a resolver 5, a resolver decoding circuit 6, an excitation push-pull amplifying circuit 7, a signal conditioning acquisition circuit 8, a sensor feedback circuit 9, and a voltage required by a power driving circuit 10; the communication interface circuit 3 of the servo driver is communicated with the rocket machine, a ground system and the like through a 1553B bus or other communication protocols, the DSP + FPGA double CPU circuit 2 receives an instruction sent by the rocket machine, the signal conditioning and acquisition circuit 8 acquires current and position signals of the permanent magnet synchronous motor mechanism 4, the excitation push-pull amplification circuit 7 drives the rotary transformer 5, the rotary transformer decoding circuit 6 acquires sine and cosine output of the rotary transformer 5 to obtain accurate rotating speed of the permanent magnet synchronous motor mechanism 4, the DSP + FPGA double CPU circuit 2 compares the instruction with feedback information of the current permanent magnet synchronous motor mechanism 4, and the SVPWM signal control power driving circuit 10 is obtained through calculation of a control algorithm, so that the permanent magnet synchronous motor mechanism is accurately controlled to move along with the instruction.

The servo driver adopts a DSP + FPGA dual-core CPU as a main control unit, wherein the DSP chip dominant frequency can reach 150MHz, and the FPGA dominant frequency can reach 50 MHz. FPGA realizes the acquisition signals of up to 20 paths of sensors, and DSP completes a complex three-ring position servo control algorithm.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the 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 application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.