CN112542966A - Rotary transformer decoding system - Google Patents
Rotary transformer decoding system Download PDFInfo
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- CN112542966A CN112542966A CN202011358406.9A CN202011358406A CN112542966A CN 112542966 A CN112542966 A CN 112542966A CN 202011358406 A CN202011358406 A CN 202011358406A CN 112542966 A CN112542966 A CN 112542966A
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- rotary transformer
- resolver
- excitation signal
- sine
- decoding
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
- H02P21/18—Estimation of position or speed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/14—Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
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- Engineering & Computer Science (AREA)
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- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
The invention discloses a resolver decoding system which comprises a resolver special decoding chip, an FPGA and an MCU, wherein the resolver special decoding chip and the FPGA are in communication connection with the MCU, a soft decoding algorithm module is arranged in the FPGA and used for acquiring a resolver position signal and calculating the position of a resolver, the soft decoding algorithm module is used for acquiring the resolver position signal and calculating the position of the resolver, the MCU is used for acquiring resolver position data calculated by the resolver special decoding chip and resolver position data calculated by the soft decoding algorithm module and performing mutual verification through the two kinds of resolver position data. The rotation-change decoding system can carry out mutual verification through rotation-change position data calculated by a special decoding chip for rotation change, or through rotation-change position data calculated by a soft decoding algorithm module. When one party fails, the other party can continue decoding operation, and the safety of the whole vehicle is effectively improved.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a rotary transformer decoding system.
Background
The rotor is an important component of the motor and the rotor position is a key input parameter for motor control. The motor for the new energy vehicle generally adopts a rotary transformer (hereinafter referred to as a rotary transformer) to obtain the position of a rotor, the rotary transformer needs to be matched with a special decoding chip for use, and the special rotary transformer decoding chip has the advantages of wide application and high maturity, but has higher cost. In comparison, the rotation soft decoding has the advantages of low cost and flexible use, but has great technical difficulty. The two types of rotation-change decoding systems have the following problems: the system may fail in some specific situations, thereby affecting the safety of the entire vehicle. Therefore, a new convolutional decoding system is urgently needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a rotary transformer decoding system which avoids common cause failure and improves the safety of a whole vehicle. The technical scheme is as follows:
in order to solve the above problems, the present invention provides a resolver decoding system, which includes a resolver decoding chip, an FPGA, and an MCU, wherein the resolver decoding chip and the FPGA are both in communication connection with the MCU, a soft decoding algorithm module is provided in the FPGA, the resolver decoding chip is used to obtain a resolver position signal and calculate a position of a resolver, the soft decoding algorithm module is used to obtain the resolver position signal and calculate a position of the resolver, the MCU is used to obtain resolver position data calculated by the resolver decoding chip and resolver position data calculated by the soft decoding algorithm module, and mutual calibration is performed through the two kinds of resolver position data.
As a further improvement of the present invention, the system further includes an amplifying circuit 1 and a conditioning circuit 1, the excitation signal 1 generated by the dedicated decoding chip for the rotary transformer is output to the rotary transformer through the amplifying circuit 1, two sine and cosine feedback signals 1 fed back by the rotary transformer are fed back to the dedicated decoding chip for the rotary transformer through the conditioning circuit 1, and the dedicated decoding chip for the rotary transformer is configured to calculate the position of the rotary transformer according to the amplitude phase relationship between the excitation signal 1 and the two sine and cosine feedback signals 1.
As a further improvement of the present invention, the system further comprises an amplifying circuit 2, a conditioning circuit 2 and a conditioning circuit 3;
the soft decoding algorithm module can obtain an excitation feedback signal of the excitation signal 1 through the conditioning circuit 2 and obtain two sine and cosine feedback signals 2 fed back by the rotary transformer through the conditioning circuit 3, and is used for calculating the position of the rotary transformer according to the amplitude phase relation between the excitation feedback signal and the two sine and cosine feedback signals 2;
the soft decoding algorithm module can also generate an excitation signal 2, the excitation signal 2 is output to the rotary transformer through the amplifying circuit 2, two sine and cosine feedback signals 3 fed back by the rotary transformer are obtained through the conditioning circuit 3, and the soft decoding algorithm module is used for calculating the position of the rotary transformer according to the amplitude phase relation of the excitation signal 2 and the two sine and cosine feedback signals 3.
As a further improvement of the present invention, the system further includes a controllable switch, the excitation signal 1 and the excitation signal 2 are both output to the rotary transformer through the controllable switch, the FPGA is connected to the controllable switch, and the FPGA can control the controllable switch to turn on the excitation signal 1 or the excitation signal 2 through a switch control signal.
As a further improvement of the present invention, when the dedicated decoding chip for the rotary transformer and the FPGA both work normally, the soft decoding algorithm module obtains an excitation feedback signal of an excitation signal 1 through a conditioning circuit 2, obtains two sine and cosine feedback signals 2 fed back by the rotary transformer through a conditioning circuit 3, calculates the position of the rotary transformer according to the amplitude phase relationship between the excitation feedback signal and the two sine and cosine feedback signals 2, and the MCU obtains the data of the position of the rotary transformer calculated by the soft decoding algorithm module; when the special decoding chip for the rotary transformer fails and the FPGA works normally, the soft decoding algorithm module generates an excitation signal 2, the excitation signal 2 is output to the rotary transformer through the amplifying circuit 2, two sine and cosine feedback signals 3 fed back by the rotary transformer are obtained through the conditioning circuit 3, the position of the rotary transformer is calculated according to the amplitude phase relation of the excitation signal 2 and the two sine and cosine feedback signals 3, and the MCU obtains the position data of the rotary transformer calculated by the soft decoding algorithm module.
As a further improvement of the invention, when the FPGA fails and the special decoding chip for the rotary transformer normally works, the special decoding chip for the rotary transformer generates an excitation signal 1 and outputs the excitation signal 1 to the rotary transformer through the amplifying circuit 1, two sine and cosine feedback signals 1 fed back by the rotary transformer are fed back to the special decoding chip for the rotary transformer through the conditioning circuit 1, the special decoding chip for the rotary transformer calculates the position of the rotary transformer according to the amplitude phase relationship between the excitation signal 1 and the two sine and cosine feedback signals 1, and the MCU acquires the position data of the rotary transformer calculated by the special decoding chip for the rotary transformer.
As a further improvement of the invention, the FPGA is provided with an ADC interface module, and the conditioning circuit 2 and the conditioning circuit 3 are connected with the ADC interface module through an ADC.
As a further improvement of the invention, the FPGA is provided with a communication interface, and the communication interface is connected with the MCU through a communication bus.
The invention has the beneficial effects that:
the rotary transformer decoding system can perform mutual verification through the rotary transformer position data calculated by the special rotary transformer decoding chip, the FPGA and the MCU, the rotary transformer position data calculated by the special rotary transformer decoding chip, the rotary transformer position data calculated by the soft decoding algorithm module and the two rotary transformer position data. When one party fails, the other party can continue decoding operation, and the safety of the whole vehicle is effectively improved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram of a convolutional decoding system in a preferred embodiment of the present invention.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
As shown in fig. 1, the resolver decoding system in the preferred embodiment of the present invention includes a dedicated resolver decoding chip, an FPGA, and an MCU, where the dedicated resolver decoding chip and the FPGA are both in communication connection with the MCU, a soft decoding algorithm module is disposed in the FPGA, the dedicated resolver decoding chip is configured to obtain a resolver position signal and calculate a position of a resolver, the soft decoding algorithm module is configured to obtain the resolver position signal and calculate a position of the resolver, and the MCU is configured to obtain resolver position data calculated by the dedicated resolver decoding chip and resolver position data calculated by the soft decoding algorithm module, and perform mutual verification through the two kinds of resolver position data.
Optionally, the FPGA is provided with a communication interface, and the communication interface is connected with the MCU through a communication bus.
Optionally, the system further includes an amplifying circuit 1 and a conditioning circuit 1, the excitation signal 1(exel +/exel-) generated by the dedicated rotation transform decoding chip is output to the rotation transform through the amplifying circuit 1, two sine and cosine feedback signals 1(sin1+/sin1-/cos1+/cos1-) fed back by the rotation transform are fed back to the dedicated rotation transform decoding chip through the conditioning circuit 1, and the dedicated rotation transform decoding chip is configured to calculate the position of the rotation transform according to the amplitude phase relationship between the excitation signal 1(exel +/exel-) and the two sine and cosine feedback signals 1(sin1+/sin1-/cos1+/cos 1-).
Further, the system also comprises an amplifying circuit 2, a conditioning circuit 2 and a conditioning circuit 3. The soft decoding algorithm module can obtain an excitation feedback signal (exefb +/exefb-) of an excitation signal 1(exel +/exel-) through the conditioning circuit 2, and obtain two sine and cosine feedback signals 2(sin2+/sin2-/cos2+/cos2-) fed back by the rotary transformer through the conditioning circuit 3, and the soft decoding algorithm module is used for calculating the position of the rotary transformer according to the amplitude phase relation of the excitation feedback signal (exefb +/exefb-) and the two sine and cosine feedback signals 2(sin2+/sin2-/cos2+/cos 2-).
The soft decoding algorithm module can also generate an excitation signal 2(exe2+/exe2-), the excitation signal 2 is output to the rotary transformer through the amplifying circuit 2, two sine and cosine feedback signals 3 fed back by the rotary transformer are obtained through the conditioning circuit 3, and the soft decoding algorithm module is used for calculating the position of the rotary transformer according to the amplitude phase relation of the excitation signal 2(exe2+/exe2-) and the two sine and cosine feedback signals 3.
In some embodiments, the system further comprises a controllable switch, the excitation signal 1(exel +/exel-) and the excitation signal 2(exe2+/exe2-) are both output to the rotary transformer through the controllable switch, the FPGA is connected with the controllable switch, and the FPGA can control the controllable switch to switch on the excitation signal 1(exel +/exel-) or the excitation signal 2(exe2+/exe2-) through a switch control signal.
When the special decoding chip for the rotary transformer and the FPGA work normally, an excitation signal 1(exel +/exel-) generated by the special decoding chip for the rotary transformer is output to the rotary transformer through the amplifying circuit 1, two sine and cosine feedback signals 1(sin1+/sin1-/cos1+/cos1-) fed back by the rotary transformer are fed back to the special decoding chip for the rotary transformer through the conditioning circuit 1, the special decoding chip for the rotary transformer calculates the position of the rotary transformer according to the amplitude phase relation between the excitation signal 1(exel +/exel-) and the two sine and cosine feedback signals 1(sin1+/sin1-/cos1+/cos1-), and the MCU obtains rotary position data calculated by the special decoding chip for the rotary transformer. Meanwhile, the soft decoding algorithm module obtains an excitation feedback signal (exefb +/exefb-) of the excitation signal 1(exel +/exel-) through the conditioning circuit 2, obtains two sine and cosine feedback signals 2(sin2+/sin2-/cos2+/cos2-) fed back by the rotary transformer through the conditioning circuit 3, calculates the position of the rotary transformer according to the amplitude phase relation of the excitation feedback signal (exefb +/exefb-) and the two sine and cosine feedback signals 2(sin2+/sin2-/cos2+/cos2-), and obtains the rotary transformer position data calculated by the soft decoding algorithm module, and the MCU performs mutual verification on the two rotary transformer position data.
When the special decoding chip for the rotary transformer fails and the FPGA works normally, the soft decoding algorithm module generates an excitation signal 2(exe2+/exe2-), the soft decoding algorithm module controls the controllable switch to switch on the excitation signal of the amplifying circuit 2, the excitation signal 2(exe2+/exe2-) is output to the rotary transformer through the amplifying circuit 2, two sine and cosine feedback signals 3 fed back by the rotary transformer are obtained through the conditioning circuit 3, the position of the rotary transformer is calculated according to the amplitude phase relation of the excitation signal 2(exe2+/exe2-) and the two sine and cosine feedback signals 3, and the MCU obtains the rotary transformer position data calculated by the soft decoding algorithm module.
When the FPGA fails and the special decoding chip for the rotary transformer works normally, an excitation signal 1(exel +/exel-) generated by the special decoding chip for the rotary transformer is output to the rotary transformer through the amplifying circuit 1, two sine and cosine feedback signals 1(sin1+/sin1-/cos1+/cos1-) fed back by the rotary transformer are fed back to the special decoding chip for the rotary transformer through the conditioning circuit 1, the special decoding chip for the rotary transformer calculates the position of the rotary transformer according to the amplitude phase relation between the excitation signal 1(exel +/exel-) and the two sine and cosine feedback signals 1(sin1+/sin1-/cos1+/cos1-), and the MCU acquires rotary position data calculated by the special decoding chip for the rotary transformer.
Preferably, the FPGA is provided with an ADC interface module, and the conditioning circuit 2 and the conditioning circuit 3 are connected to the ADC interface module through an ADC.
The rotation-change decoding system can carry out mutual verification through rotation-change position data calculated by a special decoding chip for rotation change, or through rotation-change position data calculated by a soft decoding algorithm module. When one party fails, the other party can continue decoding operation, and the safety of the whole vehicle is effectively improved.
The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (8)
1. A rotary transformer decoding system is characterized by comprising a special rotary transformer decoding chip, an FPGA and an MCU, wherein the special rotary transformer decoding chip and the FPGA are in communication connection with the MCU, a soft decoding algorithm module is arranged in the FPGA and used for acquiring a rotary transformer position signal and calculating the position of a rotary transformer, the soft decoding algorithm module is used for acquiring the rotary transformer position signal and calculating the position of the rotary transformer, the MCU is used for acquiring rotary transformer position data calculated by the special rotary transformer decoding chip and rotary transformer position data calculated by the soft decoding algorithm module, and mutual verification is carried out through the two kinds of rotary transformer position data.
2. The system of claim 1, further comprising an amplifying circuit 1 and a conditioning circuit 1, wherein the excitation signal 1 generated by the dedicated decoding chip for rotation is output to the rotation through the amplifying circuit 1, two sine and cosine feedback signals 1 fed back by the rotation are fed back to the dedicated decoding chip for rotation through the conditioning circuit 1, and the dedicated decoding chip for rotation is configured to calculate the position of the rotation according to the amplitude phase relationship between the excitation signal 1 and the two sine and cosine feedback signals 1.
3. The rotary transform decoding system of claim 2, wherein the system further comprises an amplifying circuit 2, a conditioning circuit 2, and a conditioning circuit 3;
the soft decoding algorithm module can obtain an excitation feedback signal of the excitation signal 1 through the conditioning circuit 2 and obtain two sine and cosine feedback signals 2 fed back by the rotary transformer through the conditioning circuit 3, and is used for calculating the position of the rotary transformer according to the amplitude phase relation between the excitation feedback signal and the two sine and cosine feedback signals 2;
the soft decoding algorithm module can also generate an excitation signal 2, the excitation signal 2 is output to the rotary transformer through the amplifying circuit 2, two sine and cosine feedback signals 3 fed back by the rotary transformer are obtained through the conditioning circuit 3, and the soft decoding algorithm module is used for calculating the position of the rotary transformer according to the amplitude phase relation of the excitation signal 2 and the two sine and cosine feedback signals 3.
4. The rotary transformer decoding system as claimed in claim 3, wherein the system further comprises a controllable switch, the excitation signal 1 and the excitation signal 2 are both output to the rotary transformer through the controllable switch, the FPGA is connected with the controllable switch, and the FPGA can control the controllable switch to switch on the excitation signal 1 or the excitation signal 2 through a switch control signal.
5. The rotary transformer decoding system of claim 3, wherein when the dedicated decoding chip for rotary transformer and the FPGA both work normally, the soft decoding algorithm module obtains an excitation feedback signal of an excitation signal 1 through a conditioning circuit 2, obtains two sine and cosine feedback signals 2 fed back by rotary transformer through the conditioning circuit 3, calculates the position of the rotary transformer according to the amplitude phase relationship between the excitation feedback signal and the two sine and cosine feedback signals 2, and the MCU obtains the data of the position of the rotary transformer calculated by the soft decoding algorithm module; when the special decoding chip for the rotary transformer fails and the FPGA works normally, the soft decoding algorithm module generates an excitation signal 2, the excitation signal 2 is output to the rotary transformer through the amplifying circuit 2, two sine and cosine feedback signals 3 fed back by the rotary transformer are obtained through the conditioning circuit 3, the position of the rotary transformer is calculated according to the amplitude phase relation of the excitation signal 2 and the two sine and cosine feedback signals 3, and the MCU obtains the position data of the rotary transformer calculated by the soft decoding algorithm module.
6. The resolver decoding system according to claim 3, wherein when the FPGA fails and the resolver dedicated decoding chip operates normally, the resolver dedicated decoding chip generates an excitation signal 1 and outputs the excitation signal 1 to the resolver through the amplifying circuit 1, two sine and cosine feedback signals 1 fed back by the resolver are fed back to the resolver dedicated decoding chip through the conditioning circuit 1, the resolver dedicated decoding chip calculates a position of the resolver according to an amplitude phase relationship between the excitation signal 1 and the two sine and cosine feedback signals 1, and the MCU acquires resolver position data calculated by the resolver dedicated decoding chip.
7. The rotary transformer decoding system of claim 3, wherein the FPGA is provided with an ADC interface module, and the conditioning circuit 2 and the conditioning circuit 3 are connected with the ADC interface module through an ADC.
8. The rotary transform decoding system of claim 1, wherein the FPGA is provided with a communication interface, and the communication interface is connected with the MCU through a communication bus.
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| CN202011358406.9A CN112542966A (en) | 2020-11-27 | 2020-11-27 | Rotary transformer decoding system |
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| CN202011358406.9A CN112542966A (en) | 2020-11-27 | 2020-11-27 | Rotary transformer decoding system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114465544A (en) * | 2022-03-30 | 2022-05-10 | 重庆长安新能源汽车科技有限公司 | Rotary transformer decoding device and automobile |
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| CN108599664A (en) * | 2018-05-30 | 2018-09-28 | 阳光电源股份有限公司 | A kind of the motor rotor position acquisition methods and system of rotary transformer |
| CN108988706A (en) * | 2018-07-30 | 2018-12-11 | 山东理工大学 | A kind of electric car driving permanent magnet synchronous motor rotation change decoding redundant apparatus and control method |
| CN111030551A (en) * | 2019-10-24 | 2020-04-17 | 中冶南方（武汉）自动化有限公司 | Electric automobile software and hardware decoding redundancy circuit and switching method |
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2020
- 2020-11-27 CN CN202011358406.9A patent/CN112542966A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108599664A (en) * | 2018-05-30 | 2018-09-28 | 阳光电源股份有限公司 | A kind of the motor rotor position acquisition methods and system of rotary transformer |
| CN108988706A (en) * | 2018-07-30 | 2018-12-11 | 山东理工大学 | A kind of electric car driving permanent magnet synchronous motor rotation change decoding redundant apparatus and control method |
| CN111030551A (en) * | 2019-10-24 | 2020-04-17 | 中冶南方（武汉）自动化有限公司 | Electric automobile software and hardware decoding redundancy circuit and switching method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114465544A (en) * | 2022-03-30 | 2022-05-10 | 重庆长安新能源汽车科技有限公司 | Rotary transformer decoding device and automobile |
| CN114465544B (en) * | 2022-03-30 | 2023-08-08 | 深蓝汽车科技有限公司 | Rotary-variable decoding device and automobile |
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Application publication date: 20210323 |