阅读说明：本技术 旋转变压器信号处理装置及方法、驱动装置、以及程序 (Resolver signal processing device and method, driving device, and program ) 是由 森藤力 于 2019-03-01 设计创作，主要内容包括：本发明涉及旋转变压器信号处理装置、驱动装置、旋转变压器信号处理方法以及程序。实施方式的一个方式的旋转变压器信号处理装置具备输出信号状态检测单元和断线检测单元。输出信号状态检测单元基于两相输出型的旋转变压器的输出信号,计算出上述输出信号的A相信号与B相信号的平方和。断线识别单元基于上述平方和周期性地变动的变动幅度的大小,输出表示供给上述旋转变压器的励磁信号的第1信号系统和上述输出信号的第2信号系统中的任一个的断线状态的信息。(The present invention relates to a resolver signal processing device, a driving device, a resolver signal processing method, and a program. A resolver signal processing device according to one embodiment includes an output signal state detection unit and a disconnection detection unit. The output signal state detection unit calculates a sum of squares of an A-phase signal and a B-phase signal of the output signal based on the output signal of the two-phase output type resolver. The disconnection recognizing means outputs information indicating a disconnection state of either one of a 1 st signal system of the excitation signal supplied to the resolver or a 2 nd signal system of the output signal, based on the square sum and a magnitude of a fluctuation range of the periodic fluctuation.)

1. A resolver signal processing device is provided with:

an output signal state detection unit which calculates the square sum of the A-phase signal and the B-phase signal of the output signal based on the output signal of the two-phase output type resolver; and

and a disconnection recognizing unit that outputs information indicating a disconnection state of either one of a 1 st signal system of the excitation signal supplied to the resolver or a 2 nd signal system of the output signal, based on the square sum and a magnitude of a fluctuation range of the periodic fluctuation.

2. The resolver signal processing apparatus according to claim 1,

a comparator for comparing the square sum with a predetermined threshold value,

the disconnection recognizing means outputs information indicating a disconnection state of any one of a 1 st signal system of the excitation signal supplied to the resolver and a 2 nd signal system of the output signal based on a result of the comparison.

3. The resolver signal processing apparatus according to claim 1,

the control device is provided with a pattern recognition means for recognizing a 1 st pattern and a 2 nd pattern based on the output signal, wherein the 1 st pattern is to continue the use of the resolver when the disconnection state is detected, and the 2 nd pattern is to interrupt the use of the resolver when the disconnection state is detected.

4. The resolver signal processing apparatus according to claim 3, comprising:

a reference signal generation unit that generates a reference phase (θ ref);

an arithmetic processing unit that generates an excitation phase (θ ex) based on the output signal and the reference phase (θ ref);

a switch for selecting one of the excitation phase (θ ex) and the reference phase (θ ref) based on the result of the recognition by the pattern recognition unit; and

and a conversion processing unit for generating an excitation signal of the resolver based on the selected signal.

5. The resolver signal processing apparatus according to claim 4,

the switch outputs the excitation phase (θ ex) under control of the pattern recognition unit when the pattern recognition unit recognizes the 1 st pattern.

6. The resolver signal processing apparatus according to claim 4,

the switch outputs the reference phase (θ ref) under control of the pattern recognition unit when the pattern recognition unit recognizes the 2 nd pattern.

7. A drive device is provided with:

a motor;

the resolver detects rotation of the motor;

a resolver signal processing apparatus according to claim 1, which generates an estimated value of a phase of the motor based on rotation of the motor detected by the resolver; and

and an inverter for driving the motor based on the estimated value of the phase of the motor generated by the resolver signal processing device.

8. A resolver signal processing method includes the following steps:

the signal processing device of the rotary transformer is that,

based on the output signal of the two-phase output type resolver, the sum of squares of the A-phase signal and the B-phase signal of the output signal is calculated,

and outputting information indicating a disconnection state of either one of a 1 st signal system of the excitation signal supplied to the resolver or a 2 nd signal system of the output signal, based on the magnitude of the fluctuation range in which the square sum periodically fluctuates.

9. A program for causing a computer of a resolver signal processing apparatus to execute the steps of:

calculating a sum of squares of an a-phase signal and a B-phase signal of the output signal based on the output signal of the two-phase output type resolver; and

and outputting information indicating a disconnection state of either one of a 1 st signal system of the excitation signal supplied to the resolver or a 2 nd signal system of the output signal, based on the square sum and a magnitude of a fluctuation range of the periodic fluctuation.

Technical Field

Embodiments of the present invention relate to a resolver signal processing device, a driving device, a resolver signal processing method, and a program.

Background

The resolver signal processing device extracts a rotation angle of a motor connected to the resolver based on an output of the resolver. However, when an abnormal state such as disconnection occurs in the connection between the resolver and the resolver signal processing apparatus, accurate phase information cannot be detected. When the resolver signal processing device is applied to a system that requires detection accuracy of phase information, it is sometimes required to detect occurrence of disconnection without omission, but this is not easy.

Disclosure of Invention

Problems to be solved by the invention

An object of the present invention is to provide a resolver signal processing device, a driving device, a resolver signal processing method, and a program for detecting a disconnection state of any one of a 1 st signal system for supplying an excitation signal to a two-phase output type resolver and a 2 nd signal system for receiving an output signal from the resolver.

Means for solving the problems

Drawings

Fig. 1 is a configuration diagram of a driving apparatus including a resolver signal processing apparatus according to an embodiment.

Fig. 2A is a configuration diagram of a resolver according to an embodiment.

Fig. 2B is a diagram for explaining two-phase excitation signals of the resolver according to the embodiment.

Fig. 2C is a diagram for explaining output signals of two phases of the resolver according to the embodiment.

Fig. 3 is a configuration diagram of a failure diagnosis unit of the embodiment.

Fig. 4 is a diagram for explaining a change in signal when a disconnection occurs.

Fig. 5 is a diagram for explaining detection of a portion where a disconnection has occurred.

Fig. 6A is a diagram for explaining an operation in a state where a wire break does not occur during a stop.

Fig. 6B is a diagram for explaining an operation in a state where a disconnection has not occurred during operation.

Fig. 7A is a diagram for explaining an operation in a case where a 1-phase of an excitation signal is disconnected during operation.

Fig. 7B is a diagram for explaining an operation in a case where the 1-phase of the excitation signal is disconnected during operation.

Fig. 7C is a diagram for explaining an operation in the case where the 1-phase disconnection of the excitation signal is recovered during operation.

Fig. 7D is a diagram for explaining an operation in the case where the 1-phase disconnection of the excitation signal is recovered during operation.

Fig. 7E is a diagram for explaining an operation in a case where the 1-phase of the excitation signal is disconnected during stoppage.

Fig. 7F is a diagram for explaining an operation in a case where the 1-phase of the excitation signal is disconnected during stoppage.

Fig. 7G is a diagram for explaining an operation in the case where the 1-phase disconnection of the excitation signal is recovered during the stop.

Fig. 7H is a diagram for explaining an operation in the case where the 1-phase disconnection of the excitation signal is recovered during the stop.

Fig. 8A is a diagram for explaining an operation in a case where two phases of the excitation signal are disconnected during operation.

Fig. 8B is a diagram for explaining an operation in a case where two phases of the excitation signal are disconnected during operation.

Fig. 8C is a diagram for explaining an operation in the case where the disconnection of two phases of the excitation signal is recovered during the operation.

Fig. 8D is a diagram for explaining an operation in the case where the disconnection of two phases of the excitation signal is recovered during the operation.

Fig. 9A is a diagram for explaining an operation in a case where two phases of the excitation signal are disconnected during stoppage.

Fig. 9B is a diagram for explaining an operation in a case where two phases of the excitation signal are disconnected during stoppage.

Fig. 9C is a diagram for explaining an operation in the case where the disconnection of two phases of the excitation signal is recovered during the stop.

Fig. 9D is a diagram for explaining an operation in the case where the disconnection of two phases of the excitation signal is recovered during the stop.

Fig. 10A is a diagram for explaining an operation in a case where the 1-phase of the excitation signal and the 1-phase of the output signal are disconnected during operation.

Fig. 10B is a diagram for explaining an operation in the case where disconnection of the 1-phase of the excitation signal and the 1-phase of the output signal is recovered during operation.

Fig. 11A is a diagram for explaining an operation in a case where the 1-phase of the excitation signal and the 1-phase of the output signal are disconnected during the stop.

Fig. 11B is a diagram for explaining an operation in the case where the disconnection of the 1-phase of the excitation signal and the 1-phase of the output signal is recovered during the stop.

Fig. 12A is a diagram for explaining an operation in a case where the 1-phase of the excitation signal and the 1-phase of the output signal are disconnected during operation.

Fig. 12B is a diagram for explaining an operation in the case where disconnection of the 1-phase of the excitation signal and the 1-phase of the output signal is recovered during operation.

Fig. 12C is a diagram for explaining an operation in a case where the 1-phase of the excitation signal and the 1-phase of the output signal are disconnected during the stop.

Fig. 12D is a diagram for explaining an operation in the case where the disconnection of the 1-phase of the excitation signal and the 1-phase of the output signal is recovered during the stop.

Fig. 13A is a diagram for explaining an operation in a case where two phases of the output signal are disconnected during operation.

Fig. 13B is a diagram for explaining an operation in the case where disconnection of two phases of the output signal is recovered during operation.

Fig. 13C is a diagram for explaining an operation in a case where two phases of the output signal are disconnected during stoppage.

Fig. 13D is a diagram for explaining an operation in the case where the disconnection of two phases of the output signal is recovered during the stop.

A resolver signal processing device according to one embodiment includes an output signal state detection unit and a disconnection detection unit. The output signal state detection unit calculates a sum of squares of an A-phase signal and a B-phase signal of the output signal based on the output signal of the two-phase output type resolver. The disconnection identifying means outputs information indicating a disconnection state of any one of a 1 st signal system that supplies the excitation signal of the resolver and a 2 nd signal system that supplies the output signal, based on the square sum and the magnitude of the fluctuation range that periodically fluctuates.