A high-precision dual-channel magnetic reluctance resolver

Abstract

The application relates to a high-precision double-channel magnetic resistance type rotary transformer, and relates to the technical field of advanced manufacturing equipment, which comprises a transformer body, the transformer body comprising a stator and a rotor; a salient pole magnetic conducting device installed on the rotor; and an excitation device installed on the stator; wherein the excitation device comprises a plurality of channel magnetic circuits, the salient pole magnetic conducting device comprises salient poles which are arranged in correspondence with the channel magnetic circuits, and the salient poles and the channel magnetic circuits cooperate to output voltage. The application has the effect of improving the voltage output precision of the rotary transformer.

Description

Technical Field

[0001] This application relates to the technical field of advanced manufacturing equipment, and in particular to a high-precision dual-channel reluctance rotary transformer. Background Technology

[0002] A rotary transformer is an electromagnetic sensor, also known as a synchrotron. It is a small AC motor used to measure the angular displacement and angular velocity of a rotating object's shaft. It consists of a stator and a rotor. The stator windings, acting as the primary winding, receive the excitation voltage, typically at a frequency of 3000 Hz or 5000 Hz. The rotor windings, acting as the secondary winding, receive the induced voltage through electromagnetic coupling.

[0003] Regarding the above-mentioned technology, the inventors discovered the following defects: When a single-channel radial magnetic circuit reluctance rotary transformer is working, the magnetic field coupling between the turns of the rotary transformer winding will generate electromagnetic interference to the rotary transformer, resulting in a large harmonic content in the output of the reluctance rotary transformer and a defect of low output accuracy. Summary of the Invention

[0004] To improve the output accuracy of rotary transformers, this application provides a high-precision dual-channel reluctance rotary transformer.

[0005] This application provides a high-precision dual-channel reluctance rotary transformer using the following technical solution:

[0006] A high-precision dual-channel reluctance rotary transformer includes:

[0007] The transformer body includes a stator and a rotor;

[0008] A salient pole magnetic conductive device is installed on the rotor;

[0009] The excitation device is installed on the stator;

[0010] The excitation device includes multiple magnetic circuit channels, and the salient pole magnetic guiding device includes salient poles corresponding to the magnetic circuit channels. The salient poles cooperate with the magnetic circuit channels to output voltage.

[0011] By adopting the above technical solution, when a single salient pole works alone and the harmonic content of the reluctance rotary transformer output is large, multiple salient poles can rotate simultaneously. At this time, some salient poles do not serve as the measurement output of the rotary transformer, but mainly play the role of balancing the magnetic field, so as to reduce the electromagnetic interference received by the rotary transformer during operation, reduce the harmonic content of the rotary transformer output, and thus improve the output accuracy of the rotary transformer.

[0012] Optionally, the channel magnetic circuit consists of two parts: a roughing channel and a finishing channel; the number of winding turns in the roughing channel is less than the number of winding turns in the finishing channel.

[0013] By adopting the above technical solution, in order to enable the rotary transformer to meet the working requirements of different testing environments, the user can adjust the number of winding turns of the roughing and finishing channels accordingly. The number of winding turns of the roughing and finishing channels can be adjusted according to the harmonic content of the rotary transformer output, so that the roughing and finishing channels can adapt to different input voltages during operation, thereby improving the output accuracy of the rotary transformer.

[0014] Optionally, two salient poles are provided, namely a roughing salient pole corresponding to the roughing machine channel and a finishing salient pole corresponding to the finishing machine channel; multiple magnetic protrusions are provided at equal intervals on both the roughing salient pole and the finishing salient pole, and the number of magnetic protrusions on the roughing salient pole is less than the number of magnetic protrusions on the finishing salient pole.

[0015] By adopting the above technical solution, the precision machine salient pole and the precision machine channel work together to output voltage, and the roughing machine salient pole and the roughing machine channel work together to output voltage, so that the roughing machine channel and the precision machine channel do not share the same magnetic circuit, further reducing electromagnetic interference.

[0016] Optionally, the stator is equipped with a switching control module connected to the roughing machine salient pole and the finishing machine salient pole, and both the roughing machine salient pole and the finishing machine salient pole operate in response to the switching control signal of the switching control module.

[0017] By adopting the above technical solution, the switching control module controls the working states of the roughing machine salient pole and the finishing machine salient pole, thereby controlling the working states of the roughing machine channel and the finishing machine channel. This enables multiple voltage output modes, including independent operation of the roughing machine channel, independent operation of the finishing machine channel, and coordinated operation of the roughing machine channel and the finishing machine channel.

[0018] Optionally, the transformer body is equipped with a voltage detection module connected to the roughing machine channel and the finishing machine channel respectively, and a display module connected to the voltage detection module; the display module operates in response to the voltage detection signal of the voltage detection module.

[0019] By adopting the above technical solution, when the user uses the rotary transformer, the voltage detection module detects the output voltage of the rotary transformer in real time, and the display module responds to the voltage detection signal of the voltage detection module and displays the output voltage of the rotary transformer in real time, which makes it convenient for the user to monitor the voltage output status of the rotary transformer.

[0020] Optionally, the display module is connected to the switching control module, and the display module operates in response to signals from the switching control module to which the switching control module is connected.

[0021] By adopting the above technical solution, the switching control module generates and sends a switching control signal to control the working status of the coarse machine salient pole and the fine machine salient pole. At this time, the display module responds to the switching control module signal connected to the switching control module and displays the working status of the coarse machine salient pole and the fine machine salient pole in real time, so that the user can know the actual working status of the rotary transformer at this time.

[0022] Optionally, the transformer body is provided with timers connected to the voltage detection module and the switching control module respectively. The timer starts timing in response to the voltage detection signal of the voltage detection module. When the timing duration of the timer reaches a preset time threshold, the timer generates a timing control signal and sends it. The switching control module controls the roughing salient pole and the finishing salient pole to stop operating in response to the timing control signal of the timer.

[0023] By adopting the above technical solution, when the voltage detection module detects that the harmonic content of the output voltage of the rotary transformer is large, the voltage detection module generates a voltage detection signal and sends it. The timer responds to the voltage detection signal and generates a timing control signal, which causes the switching control module to respond to the timing control signal and control the coarse machine salient pole and the fine machine salient pole to stop operating, thereby reducing the output of voltage with large harmonic content.

[0024] Optionally, the transformer body is provided with a data analysis module that is connected to the timer and the switching control module respectively. The data analysis module responds to the timing control signal of the timer and controls the switching control module to drive the coarse machine salient pole and the fine machine salient pole to operate.

[0025] By adopting the above technical solution, when the switching control module responds to the timing control signal and controls the coarse machine salient pole and the fine machine salient pole to stop operating, the data analysis module responds to the timing control signal and controls the switching control module to drive the coarse machine salient pole and the fine machine salient pole to operate, so that the rotary transformer can automatically switch to a higher precision voltage output mode when the output voltage harmonic quantity is large.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. When a single salient pole works alone and the harmonic content of the reluctance rotary transformer output is large, multiple salient poles can rotate simultaneously. At this time, some salient poles do not serve as the measurement output of the rotary transformer, but mainly play the role of balancing the magnetic field, so as to reduce the electromagnetic interference experienced by the rotary transformer during operation, reduce the harmonic content of the rotary transformer output, and thus improve the output accuracy of the rotary transformer.

[0028] 2. In order to enable the rotary transformer to meet the working requirements of different testing environments, the user adjusts the number of winding turns of the roughing and finishing channels accordingly. The number of winding turns of the roughing and finishing channels can be adjusted according to the harmonic content of the rotary transformer output, so that the roughing and finishing channels can adapt to different input voltages during operation, thereby improving the output accuracy of the rotary transformer.

[0029] 3. The switching control module generates and sends switching control signals to control the working status of the coarse machine salient pole and the fine machine salient pole. At this time, the display module responds to the switching control module signal connected to the switching control module and displays the working status of the coarse machine salient pole and the fine machine salient pole in real time, so that the user can know the actual working status of the rotary transformer. Attached Figure Description

[0030] Figure 1 This is a block diagram of each module in the embodiments of this application.

[0031] Explanation of reference numerals in the attached diagram: 1. Stator; 2. Rotor; 3. Salient pole magnetic guide device; 31. Coarse machine salient pole; 32. Fine machine salient pole; 4. Excitation device; 41. Coarse machine channel; 42. Fine machine channel; 5. Switching control module; 51. Relay; 6. Voltage detection module; 7. Display module; 8. Timer; 9. Data analysis module. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0033] This application discloses a high-precision dual-channel reluctance rotary transformer, referring to... Figure 1 The transformer includes a transformer body, which comprises a stator 1 and a rotor 2, with the rotor 2 coaxially arranged with the stator 1. When the rotary transformer is working, the rotor 2 rotates relative to the stator 1, and the output voltage of the transformer body changes with the rotational displacement of the rotor 2.

[0034] The rotor 2 is equipped with a salient pole magnetic conductor 3; the stator 1 is equipped with an excitation device 4 that is coaxially arranged with the salient pole magnetic conductor 3. When the rotary transformer is working, the salient pole magnetic conductor 3 and the excitation device 4 work together. At this time, the output voltage amplitude of the transformer body and the rotation angle of the salient pole magnetic conductor 3 are usually in a sine or cosine function relationship.

[0035] The excitation device 4 specifically includes multiple channel magnetic circuits, and the salient pole magnetic guiding device 3 specifically includes multiple salient poles corresponding to the channel magnetic circuits. The salient poles and channel magnetic circuits are in one-to-one correspondence and cooperate to perform voltage output operation. Among them, when the rotary transformer is working, the transformer body can operate one salient pole individually or multiple salient poles simultaneously.

[0036] When a single salient pole operates independently, and the harmonic content of the transformer body output is high, the transformer body can rotate multiple salient poles simultaneously. In this case, some salient poles do not serve as the measurement output of the rotary transformer, but mainly play a role in balancing the magnetic field, thereby reducing electromagnetic interference experienced by the rotary transformer during operation, reducing the harmonic content of the rotary transformer output, and thus improving the output accuracy of the rotary transformer.

[0037] In this embodiment, two sets of coaxial magnetic circuits are provided, namely a roughing channel 41 and a finishing channel 42; wherein the number of winding turns of the roughing channel 41 is less than the number of winding turns of the finishing channel 42. The user can adjust the number of winding turns of the roughing channel 41 and the finishing channel 42 accordingly before the rotary transformer is put into operation.

[0038] In order to enable the rotary transformer to meet the working requirements of different testing environments, the number of winding turns of the roughing channel 41 and the fineing channel 42 can be adjusted according to the harmonic content of the rotary transformer output, so that the roughing channel 41 and the fineing channel 42 can adapt to different input voltages during operation, thereby improving the output accuracy of the rotary transformer.

[0039] In this embodiment, two sets of salient poles are provided: a roughing salient pole 31 corresponding to the roughing channel 41 and a finishing salient pole 32 corresponding to the finishing channel 42. The finishing salient pole 32 and the finishing channel 42 work together to output voltage, and the roughing salient pole 31 and the roughing channel 41 work together to output voltage, so that the roughing channel 41 and the finishing channel 42 do not share a magnetic circuit, thereby further reducing electromagnetic interference between the roughing channel 41 and the finishing channel 42.

[0040] Both the roughing-machine salient pole 31 and the finishing-machine salient pole 32 have multiple magnetically conductive protrusions spaced at equal intervals, with the number of magnetically conductive protrusions on the roughing-machine salient pole 31 being less than the number on the finishing-machine salient pole 32. When the rotary transformer is operating, the output voltage variation period of the transformer body is affected by the number of magnetically conductive protrusions.

[0041] A switching control module 5 is installed on the stator 1, connected to the roughing machine salient pole 31 and the finishing machine salient pole 32. Both the roughing machine salient pole 31 and the finishing machine salient pole 32 operate in response to the switching control signal of the switching control module 5. The switching control module 5 controls the operating states of the roughing machine channel 41 and the finishing machine channel 42 by controlling the operating states of the roughing machine salient pole 31 and the finishing machine salient pole 32. This enables various voltage output modes, including independent operation of the roughing machine channel 41, independent operation of the finishing machine channel 42, and coordinated operation of the roughing machine channel 41 and the finishing machine channel 42.

[0042] The switching control module 5 includes relays 51 connected to the roughing machine salient pole 31 and the finishing machine salient pole 32 respectively; both the roughing machine salient pole 31 and the finishing machine salient pole 32 operate in response to the control signal of the relays 51. The switching control module 5 controls the on / off state of the circuit through the relays 51, thereby controlling the working state of the roughing machine salient pole 31 and the finishing machine salient pole 32.

[0043] The transformer body is equipped with a voltage detection module 6, which can be a frequency-selective voltmeter or a comprehensive tester. The voltage detection module 6 is connected to the output terminals of the roughing channel 41 and the finishing channel 42, respectively. When the rotary transformer is working, the voltage detection module 6 can detect the output voltage of the roughing channel 41 and the output voltage of the finishing channel 42 in real time.

[0044] The transformer body is equipped with a display module 7 connected to the voltage detection module 6. The display module 7 can be a display screen. The display module 7 operates in response to the voltage detection signal from the voltage detection module 6. When the user uses the rotary transformer, the voltage detection module 6 detects the output voltage of the rotary transformer in real time. At this time, the display module 7 responds to the voltage detection signal from the voltage detection module 6 and displays the output voltage of the rotary transformer in real time, which facilitates the user to monitor the voltage output status of the rotary transformer.

[0045] The display module 7 is connected to the switching control module 5, and operates in response to signals from the switching control module 5. The switching control module 5 controls the change of the working state of the roughing machine salient pole 31 and the finishing machine salient pole 32 by generating and sending switching control signals.

[0046] At this time, the display module 7 responds to the signal of the switching control module 5 connected to the switching control module 5, and learns the real-time working status of the roughing machine salient pole 31 and the fine machine salient pole 32. The display module 7 displays the working status of the roughing machine salient pole 31 and the fine machine salient pole 32 in real time, so that the user can know the actual working status of the rotary transformer at this time.

[0047] The transformer body is equipped with a timer 8 that is connected to the voltage detection module 6 and the switching control module 5 respectively. The timer 8 starts timing in response to the voltage detection signal of the voltage detection module 6. When the timing duration of the timer 8 reaches the preset time threshold, the timer 8 generates a timing control signal and sends it. The switching control module 5 controls the roughing salient pole 31 and the fine salient pole 32 to stop operating in response to the timing control signal of the timer 8.

[0048] When the voltage detection module 6 detects that the harmonic content of the output voltage of the rotary transformer is high, the voltage detection module 6 generates a voltage detection signal and sends it. If the timer 8 receives the voltage detection signal for a long time, it means that the output voltage of the rotary transformer is always in a state of high harmonic content.

[0049] At this time, timer 8 responds to the voltage detection signal and generates a timing control signal, which causes the switching control module 5 to respond to the timing control signal and control the coarse machine salient pole 31 and the fine machine salient pole 32 to stop operating, suspending the voltage output process of the rotary transformer, thereby reducing the output of voltage with high harmonic content.

[0050] The transformer body is equipped with a data analysis module 9 that is connected to the timer 8 and the switching control module 5 respectively. The data analysis module 9 responds to the timing control signal of the timer 8 and controls the switching control module 5 to drive the roughing salient pole 31 and the finishing salient pole 32 to operate.

[0051] When the switching control module 5 responds to the timing control signal and controls the coarse machine salient pole 31 and the fine machine salient pole 32 to stop operating, it indicates that the voltage output accuracy of the rotary transformer is low at this time, and the coarse machine salient pole 31 and the fine machine salient pole 32 may not be operating simultaneously, thus requiring further improvement in the voltage output accuracy of the rotary transformer.

[0052] At this time, the data analysis module 9 responds to the timing control signal and analyzes the working state of the rotary transformer. If the rotary transformer is not in the highest precision working state, the data analysis module 9 controls the switching control module 5 to drive the coarse machine salient pole 31 and the fine machine salient pole 32 to operate simultaneously, so that the rotary transformer operates in the highest precision working state. In this way, when the output voltage harmonic quantity is large, the rotary transformer can automatically switch to a higher precision voltage output mode.

[0053] The implementation principle of a high-precision dual-channel reluctance rotary transformer in this application embodiment is as follows: When the coarse machine salient pole 31 or the fine machine salient pole 32 works alone, the harmonic content of the output of the reluctance rotary transformer may be relatively large. At this time, the data analysis module 9 controls the switching control module 5 to drive the coarse machine salient pole 31 and the fine machine salient pole 32 to operate simultaneously. At this time, some salient poles do not serve as the measurement output of the rotary transformer, but mainly play the role of balancing the magnetic field, so as to reduce the electromagnetic interference received by the rotary transformer during operation, reduce the harmonic content of the output of the rotary transformer, and thus improve the output accuracy of the rotary transformer.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-precision dual-channel reluctance rotary transformer, characterized in that, include: The transformer body includes a stator (1) and a rotor (2); A salient pole magnetic conductor (3) is installed on the rotor (2); Excitation device (4) is installed on the stator (1); The excitation device (4) includes multiple channel magnetic circuits, and the salient pole magnetic guiding device (3) includes a salient pole corresponding to the channel magnetic circuit. The salient pole and the channel magnetic circuit cooperate to output voltage. The channel magnetic circuit consists of two parts: a roughing channel (41) and a finishing channel (42). The number of winding turns in the roughing channel (41) is less than the number of winding turns in the finishing channel (42). There are two salient poles: a roughing salient pole (31) corresponding to the roughing channel (41) and a finishing salient pole (32) corresponding to the finishing channel (42). Both the roughing salient pole (31) and the finishing salient pole (32) have multiple magnetic protrusions spaced at equal intervals. The number of magnetic protrusions on the roughing salient pole (31) is less than the number of magnetic protrusions on the finishing salient pole (32). The stator (1) is equipped with a switching control module (5) connected to the roughing salient pole (31) and the finishing salient pole (32). The roughing salient pole (31) and the finishing salient pole (32) both operate in response to the switching control signal of the switching control module (5). The transformer body is equipped with a voltage detection module (6) connected to the roughing channel (41) and the finishing channel (42) respectively, and a display module (7) connected to the voltage detection module (6); the display module (7) operates in response to the voltage detection signal of the voltage detection module (6); the display module (7) is connected to the switching control module (5), and the display module (7) operates in response to the signal of the switching control module (5) connected to the switching control module (5); The transformer body is equipped with timers (8) that are connected to the voltage detection module (6) and the switching control module (5) respectively. The timers (8) start timing in response to the voltage detection signal of the voltage detection module (6). When the timing duration of the timers (8) reaches a preset time threshold, the timers (8) generate a timing control signal and send it. The switching control module (5) controls the roughing salient pole (31) and the finishing salient pole (32) to stop operating in response to the timing control signal of the timers (8).

2. The high-precision dual-channel reluctance rotary transformer according to claim 1, characterized in that: The transformer body is provided with a data analysis module (9) that is connected to the timer (8) and the switching control module (5) respectively. The data analysis module (9) responds to the timing control signal of the timer (8) and controls the switching control module (5) to drive the roughing salient pole (31) and the finishing salient pole (32) to operate.

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