CN104166040B - Permanent-magnetic synchronous motor stator voltage detecting system and method under two phase inversions - Google Patents

Abstract

A permanent magnet synchronous motor stator voltage detection system and method thereof under two-phase conversion, the electromagnetic induction voltage sensor is connected with the first signal receiving pin and the second signal of the DSP-based data acquisition system with a serial communication interface module respectively The receiving pins are connected, and the DSP-based data acquisition system is also connected with the upper computer through the interface of serial data communication, and the upper computer has a permanent magnet synchronous motor stator voltage detection module under two-phase conversion, The permanent magnet synchronous motor stator voltage detection module under the two-phase conversion includes a three-phase rotating coordinate to two-phase rotating coordinate conversion module, and the upper computer also includes a VISA module, and the combination of the method can effectively avoid existing There is no such technology in the technology to solve the defect that the dynamic observation of the stator voltage under the two-phase rotating coordinates cannot be solved in a simple way so far due to the huge amount of data.

Description

Stator voltage detection system and method for permanent magnet synchronous motor under two-phase conversion

technical field

The invention belongs to the technical field of permanent magnet synchronous motors, and in particular relates to a permanent magnet synchronous motor stator voltage detection system under two-phase conversion and a method thereof.

Background technique

The permanent magnet synchronous motor has the advantages of simple structure, small size, light weight, low loss, high efficiency, high power factor, etc. It is mainly used for the update of high-performance servo drive systems and DC motors that require fast response, wide speed range, and accurate positioning. Replacement motor.

During the operation of the permanent magnet synchronous motor, it is often necessary to change the stator voltage from the three-phase rotating coordinate to the stator voltage under the two-phase rotating coordinate for manipulation, but now there is a lack of a convenient and simple transformation for the permanent magnet synchronous motor to two A real-time monitoring device for stator voltage in phase rotation coordinates.

Contents of the invention

The purpose of the present invention provides a permanent magnet synchronous motor stator voltage detection system and method thereof under two-phase conversion. Pin is connected with the second signal receiving pin, and the described data acquisition system based on DSP is also connected with the host computer through the interface of serial data communication, and the described host computer has a permanent magnet synchronous motor under two-phase conversion Stator voltage detection module, the permanent magnet synchronous motor stator voltage detection module under the two-phase conversion includes a three-phase rotating coordinate to two-phase rotating coordinate conversion module, and the upper computer also includes a VISA module, combined with its method It can effectively avoid the defect that there is no such technology in the prior art to dynamically observe the stator voltage under the two-phase rotating coordinates due to the huge amount of data, which cannot be solved in a simple way so far.

In order to overcome the deficiencies in the prior art, the present invention provides a solution to the permanent magnet synchronous motor stator voltage detection system and method thereof under two-phase conversion, specifically as follows:

A permanent magnet synchronous motor stator voltage detection system under two-phase conversion, comprising a first electromagnetic induction voltage sensor 1 and a second electromagnetic induction voltage sensor respectively arranged beside two phase windings of the three-phase windings of the permanent magnet synchronous motor stator 2. The first electromagnetic induction voltage sensor 1 and the second electromagnetic induction voltage sensor 2 can respectively sense the voltages of the two-phase windings, and the first electromagnetic induction voltage sensor 1 and the second electromagnetic induction voltage sensor 2 are respectively connected with the first signal receiving pin 5 and the second signal receiving pin 6 of the DSP-based data acquisition system 4 with the serial communication interface module, and the described DSP-based data acquisition system 4 is also connected through the serial The interface 8 for data communication is connected with the upper computer 9, and the upper computer 9 has a permanent magnet synchronous motor stator voltage detection module 10 under the two-phase conversion, and the permanent magnet synchronous motor stator voltage under the two-phase conversion is The detection module 10 includes a three-phase rotating coordinate to two-phase rotating coordinate transformation module 11, and the host computer 9 also includes a VISA module.

The stator voltage detection module 10 of the permanent magnet synchronous motor under the two-phase conversion also includes a man-machine interface, and the man-machine interface includes an operation interface part and a display interface part, and the operation interface part is for operating After the operation of the interface, the permanent magnet synchronous motor stator voltage detection module 10 under the two-phase conversion can send instructions to the upper computer 9; the display interface part is divided into a waveform display part and an instrument display part, and the waveform display part Part of it can detect the entire change process of the voltage data of the stator of the permanent magnet synchronous motor in the two-phase rotating coordinate system within the selected range; the instrument display part can stably display the stator of the permanent magnet synchronous motor in the two-phase rotating coordinate system The voltage data below.

The waveform display part displays the amplitude-time curve of the stator voltage of the permanent magnet synchronous motor through the waveform display window, and the instrument display part includes two arc-shaped scale areas, and the two arc-shaped scales The regions are respectively used to indicate the d-axis voltage value range of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system and the q-axis voltage value range of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system. The two arcs A pointer-like icon is set below each of the two arc-shaped scale areas, and a text box for displaying the d-axis voltage value of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system is respectively set above the two arc-shaped scale areas. And the text box of the q-axis voltage value under the two-phase rotating coordinate system.

The operation interface part includes a serial port parameter setting part, a waveform selection part, a waveform adjustment part, a control part and a waveform display parameter setting part, and the serial port parameter setting part is used for initializing the parameters of the serial port communication, and the serial port The parameter setting part includes a selection box for serial port number selection and a text box for setting the serial port communication baud rate, and the preset selection value in the selection box for serial port number selection is the upper computer 9 identifiable serial port number, the waveform display parameter setting part includes a text box used to set the conversion mode of the data IQ format, a text box used to set the buffer size and a text box used to set the sampling frequency, the said The waveform adjustment part includes the selection button for selecting the channel of the DSP-based data acquisition system, the cursor switch button for selecting whether to measure the amplitude of the selected channel of the DSP-based data acquisition system, and the cursor switch button for selecting whether to The cursor switch button for measuring the time of the channel of the selected DSP-based data acquisition system, the text box used to display the amplitude of the selected DSP-based data acquisition system channel, and the text box used to display the selected DSP-based data acquisition system The text box for the time of the channel of the data acquisition system, the text box for setting the vernier scale value, and the left and right bars for waveform movement. The control part includes a start button, a pause button and a stop button. The start button The button, the pause button and the stop button respectively execute the control of starting, suspending and terminating the measured waveform. The waveform selection part includes the d-axis voltage for selecting and displaying the stator of the permanent magnet synchronous motor under the two-phase rotating coordinate system. The click box for the waveform and the click box for selecting and displaying the q-axis voltage waveform of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system, so that the corresponding selection can be displayed in the waveform display window after selection The d-axis voltage waveform diagram of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system or the q-axis voltage waveform diagram of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system can be selected and displayed.

The method for the stator voltage detection system of the permanent magnet synchronous motor under the two-phase conversion, the steps are as follows:

Step 1: First start the permanent magnet synchronous motor stator voltage detection system under two-phase conversion, the first electromagnetic induction voltage sensor 1 and the second electromagnetic induction voltage sensor 2 respectively sense the voltages of the two-phase windings, so as to measure the permanent magnet synchronous motor voltage. The voltage of the described two-phase winding of the magnetic synchronous motor stator is carried out data acquisition, and the voltage value of the described two-phase winding that gathers is delivered to the data acquisition system 4 based on DSP, and through the permanent magnet under two-phase transformation The synchronous motor stator voltage detection module 10 runs the man-machine interface, selects the serial port number and the serial port communication baud rate in the serial port parameter setting part of the man-machine interface, and makes the serial port communication baud rate the same as that of the DSP-based data acquisition system 4 The serial communication baud rate set in the serial communication interface module is consistent;

Step 2: In other places of the permanent magnet synchronous motor stator voltage detection module 10 under two-phase conversion, the parity bit, data bit and stop bit of the serial port communication are set, and the parity bit of the serial port communication is described , the value that data bit position and stop bit set are consistent with the parity check bit, data bit position and the value that stop bit set of the serial port communication that is set in the serial communication interface module in the data acquisition system 4 based on DSP respectively;

Step 3: In addition, in the text box used to set the conversion mode of the data IQ format, the text box used to set the cache size and the text box used to set the sampling frequency, respectively perform the conversion mode, cache size and sampling of the data IQ format Frequency setting, select the channel of the DSP-based data acquisition system through the selection button used to select the channel of the DSP-based data acquisition system, and select whether to select the channel of the selected DSP-based data acquisition system The cursor switch button for amplitude measurement, the cursor switch button for selecting whether to measure the time of the channel of the selected DSP-based data acquisition system, and the text box for setting the value of the cursor scale. Make a selection based on the amplitude of the channel of the DSP-based data acquisition system, whether to measure the time of the selected channel of the DSP-based data acquisition system, and set the vernier scale value;

Step 4: Click to select the checkbox for displaying the d-axis voltage waveform of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system or to select the q-axis for displaying the permanent magnet synchronous motor stator in the two-phase rotating coordinate system Click the check box of the voltage waveform to select the voltage waveform category displayed in the waveform display window, thus completing the initialization setting;

Step 5: Then when the start button is clicked, the permanent magnet synchronous motor stator voltage detection module 10 under the two-phase conversion will send the measurement instruction to the data acquisition system 4 based on DSP through the serial data communication interface 8, The measurement instruction includes the information of initialization setting, and the permanent magnet synchronous motor stator voltage detection module 10 under the two-phase conversion is provided with an array for saving the information of the current initialization setting in the internal memory, each time when saving the current initialization setting Before information, first compare the information of the current initialization setting with the information of the last initialization setting saved in the array last time, if there is a difference, save the information of the current initialization setting to the array used to save the information of the current initialization setting In , if there is no difference, the data of the array used to save the information of the current initialization settings remains unchanged;

Step 6: When the DSP-based data acquisition system 4 receives the measurement instruction including the information of the initialization setting transmitted via the interface 8 of the serial data communication, it will display in the waveform display window according to the selection in the information of the initialization setting The voltage waveform category and the channel selection of the DSP-based data acquisition system send the voltage data corresponding to the voltage waveform category collected in real time to the upper computer 9 through the selected channel;

Step 7: After the host computer 9 receives the voltage data, the stator voltage detection module 10 of the permanent magnet synchronous motor under two-phase conversion sets a buffer area to store the received voltage data, and the serial port communication uses 4 bytes as a group each time The received and received voltage input data is data in IQ format, so that the received voltage input data is converted into real waveform data represented by ordinary decimal signed numbers after format conversion. The specific method of format conversion is first judged The sign attribute of the received voltage input data is used to derive the signed number, and the signed number can be inversely calculated to obtain the real waveform data. The real waveform data includes the two-phase winding of the stator of the permanent magnet synchronous motor The voltage value of the permanent magnet synchronous motor stator, and then through the condition that the sum of the voltage values of the three-phase windings of the permanent magnet synchronous motor stator is 0, the voltage value of the other phase winding in the three-phase winding of the permanent magnet synchronous motor stator can be derived. Among the three-phase windings of the magnetic synchronous motor stator, the voltage value of the A-phase winding, the voltage value of the B-phase winding and the voltage value of the C-group winding are expressed as V _a , V _b and V _c respectively. The permanent magnet synchronous The three-phase rotating coordinate in the motor stator voltage detection module 10 is converted to the two-phase rotating coordinate conversion module 11 according to the voltage value of the A-phase winding in the three-phase winding of the permanent magnet synchronous motor stator, the voltage value of the B-phase winding and the voltage value of the C group winding Voltage value, the voltage value of the A-phase winding in the three-phase winding of the permanent magnet synchronous motor stator, the voltage value of the B-phase winding and the voltage value of the C group winding derive permanent magnet according to formula (1) and formula (2) The d-axis voltage value of the synchronous motor stator under the two-phase rotating coordinate system and the q-axis voltage value under the two-phase rotating coordinate system, the a-axis voltage value of the permanent magnet synchronous motor stator under the two-phase stationary coordinate system and The β-axis voltage values in the two-phase stationary coordinate system are V _a and V _β respectively, and the d-axis voltage values of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system and q in the two-phase rotating coordinate system The axial voltage values are V _d and V _q respectively, and θ represents the angle between the d axis and the a axis:

The d-axis voltage value of the permanent magnet synchronous motor stator under the two-phase rotating coordinate system and the q-axis voltage value under the two-phase rotating coordinate system are stored in the buffer area in order to prepare for generating observation waveforms. When the data is stored, each In a loop, the array will be shifted backwards to store the newly read data at the front of the buffer, and the data moved out from the end of the array will be removed;

Step 8: Send the d-axis voltage value of the permanent magnet synchronous motor stator in the buffer area under the two-phase rotating coordinate system or the q-axis voltage value under the two-phase rotating coordinate system to the waveform display window for the corresponding permanent magnet synchronous motor. The stator voltage of the magnetic synchronous motor is displayed in the form of an amplitude-time curve, or in the display part of the instrument, it is marked in the arc-shaped scale area by a pointer icon and is used to display the corresponding permanent magnet synchronous motor stator. The voltage value is displayed in the text box of the d-axis voltage value in the two-phase rotating coordinate system or in the text box of the q-axis voltage value in the two-phase rotating coordinate system.

In the display process of the present invention, the amplitude and the time scale can also be enlarged and reduced as required, so as to analyze the details of the waveform. After the waveform display is realized, the time and amplitude of the waveform can also be measured through the time and amplitude cursors on the panel, so as to realize the quantitative analysis of the measured object.

Description of drawings

FIG. 1 is a schematic diagram of the connection structure of the permanent magnet synchronous motor stator voltage detection system under two-phase conversion according to the present invention.

detailed description

Control and testing are two highly related fields. LabVIEW, which started from the testing field, naturally expanded to the control field first. LabVIEW has a module LabVIEWDSC specially used in the control field. In addition, commonly used devices and data lines in the field of industrial control usually have corresponding LabVIEW drivers. Various control programs can be compiled very conveniently using LabVIEW.

As shown in Figure 1, the permanent magnet synchronous motor stator voltage detection system under two-phase conversion includes first electromagnetic induction voltage sensors 1 and second electromagnetic induction voltage sensors 1 and second Electromagnetic induction voltage sensor 2, the first electromagnetic induction voltage sensor 1 and the second electromagnetic induction voltage sensor 2 can respectively induce the voltage of the two-phase winding, the first electromagnetic induction voltage sensor 1 and the second electromagnetic induction voltage sensor 2 The electromagnetic induction voltage sensor 2 is respectively connected with the first signal receiving pin 5 and the second signal receiving pin 6 of the DSP-based data acquisition system 4 with the serial communication interface module, and the described DSP-based data acquisition system 4 is also connected with the host computer 9 through the serial data communication interface 8, the host computer 9 has a permanent magnet synchronous motor stator voltage detection module 10 under the two-phase conversion, and the permanent magnet synchronous motor under the two-phase conversion The synchronous motor stator voltage detection module 10 includes a three-phase rotating coordinate to two-phase rotating coordinate transformation module 11, and the host computer 9 also includes a VISA module. The stator voltage detection module 10 of the permanent magnet synchronous motor under the two-phase conversion also includes a man-machine interface, and the man-machine interface includes an operation interface part and a display interface part, and the operation interface part is for operating After the operation of the interface, the permanent magnet synchronous motor stator voltage detection module 10 under the two-phase conversion can send instructions to the upper computer 9; the display interface part is divided into a waveform display part and an instrument display part, and the waveform display part Part of it can detect the entire change process of the voltage data of the stator of the permanent magnet synchronous motor in the two-phase rotating coordinate system within the selected range; the instrument display part can stably display the stator of the permanent magnet synchronous motor in the two-phase rotating coordinate system The voltage data below. The waveform display part displays the amplitude-time curve of the stator voltage of the permanent magnet synchronous motor through the waveform display window, and the instrument display part includes two arc-shaped scale areas, and the two arc-shaped scales The regions are respectively used to indicate the d-axis voltage value range of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system and the q-axis voltage value range of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system. The two arcs A pointer-like icon is set below each of the two arc-shaped scale areas, and a text box for displaying the d-axis voltage value of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system is respectively set above the two arc-shaped scale areas. And the text box of the q-axis voltage value under the two-phase rotating coordinate system. The operation interface part includes a serial port parameter setting part, a waveform selection part, a waveform adjustment part, a control part and a waveform display parameter setting part, and the serial port parameter setting part is used for initializing the parameters of the serial port communication, and the serial port The parameter setting part includes a selection box for serial port number selection and a text box for setting the serial port communication baud rate, and the preset selection value in the selection box for serial port number selection is the upper computer 9 identifiable serial port number, the waveform display parameter setting part includes a text box used to set the conversion mode of the data IQ format, a text box used to set the buffer size and a text box used to set the sampling frequency, the said The waveform adjustment part includes the selection button for selecting the channel of the DSP-based data acquisition system, the cursor switch button for selecting whether to measure the amplitude of the selected channel of the DSP-based data acquisition system, and the cursor switch button for selecting whether to The cursor switch button for measuring the time of the channel of the selected DSP-based data acquisition system, the text box used to display the amplitude of the selected DSP-based data acquisition system channel, and the text box used to display the selected DSP-based data acquisition system The text box for the time of the channel of the data acquisition system, the text box for setting the vernier scale value, and the left and right pull bars for waveform movement. The control part includes a start button, a pause button and a stop button. The start button The button, the pause button and the stop button respectively execute the control of starting, suspending and terminating the measured waveform. The waveform selection part includes the d-axis voltage for selecting and displaying the stator of the permanent magnet synchronous motor under the two-phase rotating coordinate system. The click box for the waveform and the click box for selecting and displaying the q-axis voltage waveform of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system, so that the corresponding selection can be displayed in the waveform display window after selection The d-axis voltage waveform diagram of the permanent magnet synchronous motor stator under the two-phase rotating coordinate system or the q-axis voltage waveform diagram of the permanent magnet synchronous motor stator under the two-phase rotating coordinate system can be selected and displayed.

The method for the stator voltage detection system of the permanent magnet synchronous motor under the two-phase conversion, the steps are as follows:

Step 1: First start the permanent magnet synchronous motor stator voltage detection system under two-phase conversion, the first electromagnetic induction voltage sensor 1 and the second electromagnetic induction voltage sensor 2 respectively sense the voltages of the two-phase windings, so as to measure the permanent magnet synchronous motor voltage. The voltage of the described two-phase winding of the magnetic synchronous motor stator is carried out data acquisition, and the voltage value of the described two-phase winding that gathers is delivered to the data acquisition system 4 based on DSP, and through the permanent magnet under two-phase transformation The synchronous motor stator voltage detection module 10 runs the man-machine interface, selects the serial port number and the serial port communication baud rate in the serial port parameter setting part of the man-machine interface, and makes the serial port communication baud rate the same as that of the DSP-based data acquisition system 4 The serial communication baud rate set in the serial communication interface module is consistent;

Step 2: In other places of the permanent magnet synchronous motor stator voltage detection module 10 under two-phase conversion, the parity bit, data bit and stop bit of the serial port communication are set, and the parity bit of the serial port communication is described , the value that data bit position and stop bit set are consistent with the parity check bit, data bit position and the value that stop bit set of the serial port communication that is set in the serial communication interface module in the data acquisition system 4 based on DSP respectively;

Step 3: In addition, in the text box used to set the conversion mode of the data IQ format, the text box used to set the cache size and the text box used to set the sampling frequency, respectively perform the conversion mode, cache size and sampling of the data IQ format Frequency setting, select the channel of the DSP-based data acquisition system through the selection button used to select the channel of the DSP-based data acquisition system, and select whether to select the channel of the selected DSP-based data acquisition system The cursor switch button for amplitude measurement, the cursor switch button for selecting whether to measure the time of the channel of the selected DSP-based data acquisition system, and the text box for setting the value of the cursor scale. Make a selection based on the amplitude of the channel of the DSP-based data acquisition system, whether to measure the time of the selected channel of the DSP-based data acquisition system, and set the vernier scale value;

Step 4: Click to select the checkbox for displaying the d-axis voltage waveform of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system or to select the q-axis for displaying the permanent magnet synchronous motor stator in the two-phase rotating coordinate system Click the check box of the voltage waveform to select the voltage waveform category displayed in the waveform display window, thus completing the initialization setting;

Step 5: Then when the start button is clicked, the permanent magnet synchronous motor stator voltage detection module 10 under the two-phase conversion will send the measurement instruction to the data acquisition system 4 based on DSP through the serial data communication interface 8, The measurement instruction includes the information of initialization setting, and the permanent magnet synchronous motor stator voltage detection module 10 under the two-phase conversion is provided with an array for saving the information of the current initialization setting in the internal memory, each time when saving the current initialization setting Before information, first compare the information of the current initialization setting with the information of the last initialization setting saved in the array last time, if there is a difference, save the information of the current initialization setting to the array used to save the information of the current initialization setting In , if there is no difference, the data of the array used to save the information of the current initialization settings remains unchanged;

Step 6: When the DSP-based data acquisition system 4 receives the measurement instruction including the information of the initialization setting transmitted via the interface 8 of the serial data communication, it will display in the waveform display window according to the selection in the information of the initialization setting The voltage waveform category and the channel selection of the DSP-based data acquisition system send the voltage data corresponding to the voltage waveform category collected in real time to the upper computer 9 through the selected channel;

Step 7: After the host computer 9 receives the voltage data, the stator voltage detection module 10 of the permanent magnet synchronous motor under two-phase conversion sets a buffer area to store the received voltage data, and the serial port communication uses 4 bytes as a group each time The received and received voltage input data is data in IQ format, so that the received voltage input data is converted into real waveform data represented by ordinary decimal signed numbers after format conversion. The specific method of format conversion is first judged The sign attribute of the received voltage input data is used to derive the signed number, and the signed number can be inversely calculated to obtain the real waveform data. The real waveform data includes the two-phase winding of the stator of the permanent magnet synchronous motor The voltage value of the permanent magnet synchronous motor stator, and then through the condition that the sum of the voltage values of the three-phase windings of the permanent magnet synchronous motor stator is 0, the voltage value of the other phase winding in the three-phase winding of the permanent magnet synchronous motor stator can be derived. Among the three-phase windings of the magnetic synchronous motor stator, the voltage value of the A-phase winding, the voltage value of the B-phase winding and the voltage value of the C-group winding are expressed as V _a , V _b and V _c respectively. The permanent magnet synchronous The three-phase rotating coordinate in the motor stator voltage detection module 10 is converted to the two-phase rotating coordinate conversion module 11 according to the voltage value of the A-phase winding in the three-phase winding of the permanent magnet synchronous motor stator, the voltage value of the B-phase winding and the voltage value of the C group winding Voltage value, the voltage value of the A-phase winding in the three-phase winding of the permanent magnet synchronous motor stator, the voltage value of the B-phase winding and the voltage value of the C group winding derive permanent magnet according to formula (1) and formula (2) The d-axis voltage value of the synchronous motor stator under the two-phase rotating coordinate system and the q-axis voltage value under the two-phase rotating coordinate system, the a-axis voltage value of the permanent magnet synchronous motor stator under the two-phase stationary coordinate system and The β-axis voltage values in the two-phase stationary coordinate system are V _a and V _β respectively, and the d-axis voltage values of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system and q in the two-phase rotating coordinate system The axial voltage values are V _d and V _q respectively, and θ represents the angle between the d axis and the a axis:

The d-axis voltage value of the permanent magnet synchronous motor stator under the two-phase rotating coordinate system and the q-axis voltage value under the two-phase rotating coordinate system are stored in the buffer area in order to prepare for generating observation waveforms. When the data is stored, each In a loop, the array will be shifted backwards to store the newly read data at the front of the buffer, and the data moved out from the end of the array will be removed;

Step 8: Send the d-axis voltage value of the permanent magnet synchronous motor stator in the buffer area under the two-phase rotating coordinate system or the q-axis voltage value under the two-phase rotating coordinate system to the waveform display window for the corresponding permanent magnet synchronous motor. The stator voltage of the magnetic synchronous motor is displayed in the form of an amplitude-time curve, or in the display part of the instrument, it is marked in the arc-shaped scale area by a pointer icon and is used to display the corresponding permanent magnet synchronous motor stator. The voltage value is displayed in the text box of the d-axis voltage value in the two-phase rotating coordinate system or in the text box of the q-axis voltage value in the two-phase rotating coordinate system.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, may use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but as long as they do not depart from the technical solution of the present invention, according to the technical content of the present invention Within the spirit and principles of the present invention, any simple modifications, equivalent replacements and improvements made to the above embodiments still fall within the scope of protection of the technical solutions of the present invention.

Claims (1)

1. The method of the permanent magnet synchronous motor stator voltage detection system under a kind of two-phase transformation, it is characterized in that the permanent magnet synchronous motor stator voltage detection system under the two-phase transformation comprises two in the three-phase winding of the permanent magnet synchronous motor stator A first electromagnetic induction voltage sensor and a second electromagnetic induction voltage sensor are respectively arranged beside the phase windings, and the first electromagnetic induction voltage sensor and the second electromagnetic induction voltage sensor can sense the voltages of the two-phase windings respectively, so The first electromagnetic induction voltage sensor described above and the second electromagnetic induction voltage sensor are connected with the first signal receiving pin and the second signal receiving pin of the DSP-based data acquisition system with the serial communication interface module respectively, and the described The DSP-based data acquisition system is also connected with the host computer through the serial data communication interface, and the host computer has a permanent magnet synchronous motor stator voltage detection module under the two-phase conversion, and the two-phase conversion under the The permanent magnet synchronous motor stator voltage detection module includes a three-phase rotating coordinate to two-phase rotating coordinate conversion module, and the host computer also includes a VISA module; the permanent magnet synchronous motor stator voltage detection module under the two-phase conversion also includes It includes a man-machine interface, the man-machine interface includes an operation interface part and a display interface part, and the operation interface part is a stator of a permanent magnet synchronous motor that can undergo two-phase conversion after operating the operation interface. The voltage detection module sends instructions to the upper computer; the display interface part is divided into a waveform display part and an instrument display part, and the waveform display part can detect that the stator of the permanent magnet synchronous motor within the selected range is in the two-phase rotating coordinate system The whole change process of the voltage data under; the instrument display part can stably display the voltage data of the stator of the permanent magnet synchronous motor under the two-phase rotating coordinate system; The waveform display part displays the amplitude-time curve of the stator voltage of the permanent magnet synchronous motor through the waveform display window, and the instrument display part includes two arc-shaped scale areas, and the two arc-shaped scales The regions are respectively used to indicate the d-axis voltage value range of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system and the q-axis voltage value range of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system. The two arcs A pointer-like icon is set below each of the two arc-shaped scale areas, and a text box for displaying the d-axis voltage value of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system is respectively set above the two arc-shaped scale areas. And the text box of the q-axis voltage value under the two-phase rotating coordinate system; The operation interface part includes a serial port parameter setting part, a waveform selection part, a waveform adjustment part, a control part and a waveform display parameter setting part, and the serial port parameter setting part is used for initializing the parameters of the serial port communication, and the serial port The parameter setting part includes a selection box for serial port number selection and a text box for setting the serial communication baud rate, and the preset selection value in the selection box for serial port number selection can be set by the host computer The identified serial port number, the waveform display parameter setting part includes a text box used to set the conversion mode of the data IQ format, a text box used to set the buffer size and a text box used to set the sampling frequency, the described The waveform adjustment part includes a selection button for selecting the channel of the DSP-based data acquisition system, a cursor switch button for selecting whether to measure the amplitude of the channel of the selected DSP-based data acquisition system, and a cursor switch button for selecting whether to The cursor switch button for measuring the time of the channel of the selected DSP-based data acquisition system, the text box used to display the amplitude of the selected DSP-based data acquisition system channel, and the text box used to display the selected DSP-based data acquisition system. The text box of the channel time of the data acquisition system, the text box used to set the vernier scale value, and the left and right pull bars used for waveform movement, the control part includes a start button, a pause button and a stop button, and the start button , the pause button and the stop button respectively execute the control of starting, suspending operation and terminating operation on the measured waveform, and the waveform selection part includes the d-axis voltage waveform for selecting and displaying the stator of the permanent magnet synchronous motor under the two-phase rotating coordinate system The click box and the click box for selecting and displaying the q-axis voltage waveform of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system, so that after selection, the corresponding selection for selecting the permanent magnet synchronous motor will be displayed in the waveform display window. The d-axis voltage waveform diagram of the magnetic synchronous motor stator in the two-phase rotating coordinate system or the q-axis voltage waveform diagram of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system for selection; The steps of the method of the permanent magnet synchronous motor stator voltage detection system under two-phase conversion are as follows Step 1: First start the permanent magnet synchronous motor stator voltage detection system under two-phase conversion, the first electromagnetic induction voltage sensor and the second electromagnetic induction voltage sensor respectively sense the voltage of the two-phase windings, so as to control the permanent magnet synchronous motor The voltage of the two-phase windings of the motor stator is collected for data acquisition, and the collected voltage values of the two-phase windings are transferred to a DSP-based data acquisition system, and the stator of the permanent magnet synchronous motor under the two-phase conversion The voltage detection module runs the human-computer interaction interface. In the serial port parameter setting part of the human-computer interaction interface, select the serial port number and serial communication baud rate, and make the serial communication baud rate the same as the serial communication in the DSP-based data acquisition system. The serial communication baud rate set in the interface module is consistent; Step 2: In other places of the permanent magnet synchronous motor stator voltage detection module under the two-phase conversion, the parity bit, data bit and stop bit of the serial port communication are set, and the parity bit of the serial port communication, The value that the data bit and the stop bit are set is consistent with the parity check bit, the data bit and the value that the stop bit is set of the serial port communication that is set in the serial communication interface module in the data acquisition system based on DSP respectively; Step 3: In addition, in the text box used to set the conversion mode of the data IQ format, the text box used to set the cache size and the text box used to set the sampling frequency, respectively perform the conversion mode, cache size and sampling of the data IQ format Frequency setting, select the channel of the DSP-based data acquisition system through the selection button used to select the channel of the DSP-based data acquisition system, and select whether to select the channel of the selected DSP-based data acquisition system The cursor switch button for amplitude measurement, the cursor switch button for selecting whether to measure the time of the channel of the selected DSP-based data acquisition system, and the text box for setting the value of the cursor scale. Make a selection based on the amplitude of the channel of the DSP-based data acquisition system, whether to measure the time of the selected channel of the DSP-based data acquisition system, and set the vernier scale value; Step 4: Click to select the checkbox for displaying the d-axis voltage waveform of the permanent magnet synchronous motor stator in the two-phase rotating coordinate system or to select the q-axis for displaying the permanent magnet synchronous motor stator in the two-phase rotating coordinate system Click the check box of the voltage waveform to select the voltage waveform category displayed in the waveform display window, thus completing the initialization setting; Step 5: Then when the start button is clicked, the permanent magnet synchronous motor stator voltage detection module under the two-phase conversion will send the measurement instruction to the data acquisition system based on DSP through the interface of serial data communication, the described The measurement instruction includes the information of the initialization setting, and the stator voltage detection module of the permanent magnet synchronous motor under the two-phase conversion is provided with an array used to save the information of the current initialization setting in the memory, and each time before saving the information of the current initialization setting, first Compare the information of the current initialization setting with the information of the last initialization setting saved in the array last time, if there is a difference, save the information of the current initialization setting in the array used to save the information of the current initialization setting, if not Difference, the data of the array used to save the information of the current initialization settings remains unchanged; Step 6: When the DSP-based data acquisition system receives the measurement instruction including the information of the initialization setting transmitted through the interface 8 of the serial data communication, the voltage displayed in the waveform display window will be selected according to the information of the initialization setting The waveform category and the channel selection of the DSP-based data acquisition system send the real-time collected voltage data corresponding to the voltage waveform category to the host computer through the selected channel; Step 7: After the host computer receives the voltage data, the stator voltage detection module of the permanent magnet synchronous motor under two-phase conversion sets a buffer area to store the received voltage data, and the serial port communication uses 4 bytes as a group to send and receive each time Data, the received voltage input data is data in IQ format, and then through format conversion, the received voltage input data is converted into real waveform data represented by ordinary decimal signed numbers. The specific method of format conversion is to first judge the received The sign attribute of the voltage input data is used to derive the signed number, and the signed number can be obtained through inverse operation to obtain the real waveform data. The real waveform data includes the voltage of the two-phase winding of the stator of the permanent magnet synchronous motor value, and then through the condition that the sum of the voltage values of the three-phase windings of the permanent magnet synchronous motor stator is 0, the voltage value of the other phase winding in the three-phase winding of the permanent magnet synchronous motor stator can be derived. The permanent magnet synchronous Among the three-phase windings of the motor stator, the voltage value of the A-phase winding, the voltage value of the B-phase winding and the voltage value of the C-group winding are respectively expressed as Va, Vb and Vc, and the stator voltage detection module of the permanent magnet synchronous motor under two-phase conversion The three-phase rotating coordinate to two-phase rotating coordinate conversion module in the permanent magnet synchronous motor stator is based on the voltage value of the A-phase winding, the voltage value of the B-phase winding and the voltage value of the C-group winding in the three-phase winding of the permanent magnet synchronous motor stator. Among the three-phase windings of the magnetic synchronous motor stator, the voltage value of the A-phase winding claim 6, the voltage value of the B-phase winding and the voltage value of the C-group winding are derived from the permanent magnet synchronous motor stator according to formula (1) and formula (2). The d-axis voltage value under the two-phase rotating coordinate system and the q-axis voltage value under the two-phase rotating coordinate system, the a-axis voltage value of the permanent magnet synchronous motor stator under the two-phase stationary coordinate system and the two-phase The β-axis voltage values under the static coordinate system are Va and Vβ respectively, and the d-axis voltage values of the permanent magnet synchronous motor stator under the two-phase rotating coordinate system and the q-axis voltage values under the two-phase rotating coordinate system are respectively Vd and Vq, θ represent the angle between the d-axis and the a-axis: <mrow><mfenced open = "[" close = "]"><mtable><mtr><mtd><msub><mi>V</mi><mi>&amp;alpha;</mi></msub></mtd></mtr><mtr><mtd><msub><mi>V</mi><mi>&amp;beta;</mi></msub></mtd></mtr></mtable></mfenced><mo>=</mo><mfrac><mn>2</mn><mn>3</mn></mfrac><mfenced open = "[" close = "]"><mtable><mtr><mtd><mn>1</mn></mtd><mtd><mrow><mo>-</mo><mn>1</mn><mo>/</mo><mn>2</mn></mrow></mtd><mtd><mrow><mo>-</mo><mn>1</mn><mo>/</mo><mn>2</mn></mrow></mtd></mtr><mtr><mtd><mn>0</mn></mtd><mtd><mrow><msqrt><mn>3</mn></msqrt><mo>/</mo><mn>2</mn></mrow></mtd><mtd><mrow><mo>-</mo><msqrt><mn>3</mn></msqrt><mo>/</mo><mn>2</mn></mrow></mtd></mtr></mtable></mfenced><mfenced open = "[" close = "]"><mtable><mtr><mtd><msub><mi>V</mi><mi>a</mi></msub></mtd></mtr><mtr><mtd><msub><mi>V</mi><mi>b</mi></msub></mtd></mtr><mtr><mtd><msub><mi>V</mi><mi>c</mi></msub></mtd></mtr></mtable></mfenced><mo>-</mo><mo>-</mo><mo>-</mo><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow></mrow> <mrow><mfenced open = "[" close = "]"><mtable><mtr><mtd><msub><mi>V</mi><mi>d</mi></msub></mrow>mtd></mtr><mtr><mtd><msub><mi>V</mi><mi>q</mi></msub></mtd></mtr></mtable></mfenced><mo>=</mo><mfenced open = "[" close = "]"><mtable><mtr><mtd><mrow><mi>cos</mi><mi>&amp;theta;</mi></mrow></mtd><mtd><mrow><mi>sin</mi><mi>&amp;theta;</mi></mrow></mtd></mtr><mtr><mtd><mrow><mo>-</mo><mi>s</mi><mi>i</mi><mi>n</mi><mi>&amp;theta;</mi></mrow></mtd><mtd><mrow><mi>cos</mi><mi>&amp;theta;</mi></mrow></mtd></mtr></mtable></mfenced><mfenced open = "[" close = "]"><mtable><mtr><mtd><msub><mi>V</mi><mi>&amp;alpha;</mi></msub></mtd></mtr><mtr><mtd><msub><mi>V</mi><mi>&amp;beta;</mi></msub></mtd></mtr></mtable></mfenced><mo>-</mo><mo>-</mo><mo>-</mo><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow></mrow> The d-axis voltage value of the permanent magnet synchronous motor stator under the two-phase rotating coordinate system and the q-axis voltage value under the two-phase rotating coordinate system are stored in the buffer area in order to prepare for generating observation waveforms. When the data is stored, each In a loop, the array will be shifted backwards to store the newly read data at the front of the buffer, and the data moved out from the end of the array will be removed; Step 8: Send the d-axis voltage value of the permanent magnet synchronous motor stator in the buffer area under the two-phase rotating coordinate system or the q-axis voltage value under the two-phase rotating coordinate system to the waveform display window for the corresponding permanent magnet synchronous motor. The stator voltage of the magnetic synchronous motor is displayed in the form of an amplitude-time curve, or in the display part of the instrument, it is marked in the arc-shaped scale area by a pointer icon and is used to display the corresponding permanent magnet synchronous motor stator. The voltage value is displayed in the text box of the d-axis voltage value in the two-phase rotating coordinate system or in the text box of the q-axis voltage value in the two-phase rotating coordinate system.