Digital-rotary transformer converter module

Abstract

The utility model provides a digital-to-rotary transformer converter module. The digital-rotary transformer converter module comprises a reference transformer, a quadrant converter, a sine multiplier, a cosine multiplier and an isolation transformer, the reference transformer is a step-down transformer, and the output end of the reference transformer is electrically connected with the input end of the sine multiplier and the input end of the cosine multiplier through the quadrant converter. The output end of the sine multiplier and the output end of the cosine multiplier are connected with the input end of the isolation transformer through the power amplifier, and input sine and cosine signals are boosted and isolated through the isolation transformer to form four-wire selsyn signal output. By setting the proportionality coefficient, the output reference voltage and the reference voltage effective value VO and knowing the output of the output voltage value, the circuit can calculate the accurate theta value, has the advantages of high precision and high reliability, and is suitable for connecting a computer and an interface circuit of a control system.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer converters, and in particular relates to a digital-rotary transformer converter module. Background Art

[0002] A digital-to-resolver converter module is an important electronic component. A digital-to-resolver converter module is a device that can convert an input digital full-angle value into a resolver signal. This module is an ideal interface circuit between computers and control systems and can be used in a variety of situations, such as servo mechanisms, position control, fire control systems, simulators, and industrial control. A digital-to-resolver converter module has a wide range of applications in servo mechanisms, position control, and detection systems. With the rapid development of integrated circuits, many products of this type of converter have been launched in solid-state circuit packaging. In China, this type of digital converter module ranges from 12 bits to 22 bits, and the conversion accuracy can basically meet application requirements. However, due to the internal response speed limitations of the digital converter, the converter can only track shaft angle changes within a certain speed range. Therefore, in digital conversion systems that require high multi-channel signal switching speeds, more advanced technologies are needed to improve the converter's response speed and accuracy. In summary, a digital-to-resolver converter module is a powerful and widely used electronic component. With the continuous development of technology, its performance will continue to improve and its application areas will be further expanded. Utility Model Content

[0003] The technical content of the utility model is to provide a digital-rotary transformer converter module.

[0004] To solve the above problems, the present invention provides a digital-resolver converter module, including a reference transformer, a quadrant transformation, a sine multiplier, a cosine multiplier, and an isolation transformer. The reference transformer is a step-down transformer. The output end of the reference transformer is electrically connected to the input ends of the sine multiplier and the cosine multiplier through the quadrant transformation. The output ends of the sine multiplier and the cosine multiplier are both connected to the input end of the isolation transformer through a power amplifier. The input sine and cosine signals are stepped up and isolated by the isolation transformer to form a four-wire synchro signal output.

[0005] As a further solution of the present invention, the S1 output terminal of the isolation transformer outputs a resolver sine signal, the S2 output terminal of the isolation transformer outputs a resolver cosine signal, the S3 output terminal of the isolation transformer outputs a resolver sine signal, and the S4 terminal of the isolation transformer is a no-load signal output terminal.

[0006] As a further solution of the present invention, the reference transformer isolates and steps down the input reference signal, providing a reference signal to the sine multiplier and cosine multiplier. The digital angle quantity is input, and the 14 bits are connected to the sine multiplier and cosine multiplier via a digital latch. The upper 2 bits are connected to the quadrant conversion to form full-quadrant sine and cosine signals, which are amplified by the power amplifier and finally isolated with the isolation transformer to form a three-wire synchro signal output, namely:

[0007] Vo=EoSinwt, where Vo is the output of the reference voltage and Eo is the effective value of the reference voltage

[0008] Vs1-s3=KEo sinωt sinθ

[0009] Vs3-s2=KEo sinωt sin(θ+120°)

[0010] Vs2-s1=KEo sinωt sin(θ+240°)

[0011] Where K is the change of the isolation transformer

[0012] Or four-wire two-phase resolver signal output, that is:

[0013] Vs1-s3=KEo sinωt sinθ

[0014] Vs4-s2=KEo sinωt cosθ.

[0015] Compared with related technologies, the digital-resolver converter module provided by the present invention has the following beneficial effects:

[0016] 1. The lower 10, 12, or 14 bits are connected to the sine and cosine multiplier, and the upper 2 bits are connected to the quadrant converter to form full-quadrant sine and cosine signals. These signals are amplified by the power amplifier and finally stepped up and isolated by the reference transformer to form a three-wire synchro signal output, i.e., URL-RH = VOSinwt. The proportional coefficient K is constant, and the output voltage value is known. The output reference voltage and the reference voltage effective value V0 can be set according to the requirements, so the calculation can accurately determine the θ value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the circuit principle structure of a digital-resolver converter module of the utility model;

[0019] Figure 2This is a functional pin diagram of a digital-resolver converter module of the utility model.

[0020] In the figure: 1. Reference transformer; 2. Quadrant transformation; 3. Sine multiplier; 4. Cosine multiplier; 5. Isolation transformer. DETAILED DESCRIPTION

[0021] Please refer to Figure 1-2 A digital-to-resolver converter module includes a reference transformer 1, a quadrant transform 2, a sine multiplier 3, a cosine multiplier 4, and an isolation transformer 5. The reference transformer 1 is a step-down transformer. The output of the reference transformer 1 is electrically connected to the inputs of the sine multiplier 3 and the cosine multiplier 4 through the quadrant transform 2. The outputs of the sine multiplier 3 and the cosine multiplier 4 are both connected to the input of the isolation transformer 5 through a power amplifier. The input sine and cosine signals are boosted and isolated by the isolation transformer 5 to form a four-wire synchro signal output.

[0022] Preferably, the S1 output terminal of the isolation transformer 5 outputs a resolver sine signal, the S2 output terminal of the isolation transformer 5 outputs a resolver cosine signal, the S3 output terminal of the isolation transformer 5 outputs a resolver sine signal, and the S4 terminal of the isolation transformer 5 is a no-load signal output terminal;

[0023] Preferably, the reference transformer 1 isolates and steps down the input reference signal, providing a reference signal to the sine multiplier 3 and the cosine multiplier 4. The digital angle input is connected to the 14 bits of the digital latch to the sine multiplier 3 and the cosine multiplier 4, and the upper 2 bits are connected to the quadrant conversion to form full-quadrant sine and cosine signals, which are amplified by the power amplifier and finally isolated with the isolation transformer 5 to form a three-wire synchro signal output, that is:

[0024] Vo=EoSinwt, where Vo is the output of the reference voltage and Eo is the effective value of the reference voltage

[0025] Vs1-s3=KEo sinωt sinθ

[0026] Vs3-s2=KEo sinωt sin(θ+120°)

[0027] Vs2-s1=KEo sinωt sin(θ+240°)

[0028] Where K is the change of the isolation transformer 5

[0029] Or four-wire two-phase resolver signal output, that is:

[0030] Vs1-s3=KEo sinωt sinθ

[0031] Vs4-s2=KEo sinωt cosθ.

[0032] The standard parts used in this embodiment can be purchased directly from the market, and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the components known to technical personnel in this field, their structures and principles are all known to technical personnel through technical manuals or through conventional experimental methods.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments or applied directly or indirectly without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the appended claims and their equivalents, which are equally included in the scope of patent protection of the present invention.

Claims

1. A digital-resolver converter module, comprising a reference transformer (1), a quadrant transform (2), a sine multiplier (3), a cosine multiplier (4), and an isolation transformer (5), characterized in that: The reference transformer (1) is a step-down transformer. The output end of the reference transformer (1) is electrically connected to the input ends of a sine multiplier (3) and a cosine multiplier (4) through a quadrant transformation (2). The output ends of the sine multiplier (3) and the cosine multiplier (4) are both connected to the input end of an isolation transformer (5) through a power amplifier. The input sine and cosine signals are stepped up and isolated by the isolation transformer (5) to form a four-wire synchro signal output.

2. The digital-to-resolver converter module according to claim 1, wherein: The S1 output terminal of the isolation transformer (5) outputs a resolver sine signal, the S2 output terminal of the isolation transformer (5) outputs a resolver cosine signal, the S3 output terminal of the isolation transformer (5) outputs a resolver sine signal, and the S4 terminal of the isolation transformer (5) is a no-load signal output terminal.

3. The digital-to-resolver converter module according to claim 1, wherein: The reference transformer (1) isolates and reduces the voltage of the input reference signal, provides a reference signal to the sine multiplier (3) and the cosine multiplier (4), and a digital angle input. The 14 bits are connected to the sine multiplier (3) and the cosine multiplier (4) through the digital latch, and the upper 2 bits are connected to the quadrant conversion to form full-quadrant sine and cosine signals, which are amplified by the power amplifier and finally isolated with the isolation transformer (5) to form a three-wire synchro signal output, namely: Vo=EoSinwt, where Vo is the output of the reference voltage and Eo is the effective value of the reference voltage Vs1-s3=KEo sinωt sinθ Vs3-s2=KEo sinωt sin(0+120°) Vs2-s1=KEo sinωt sin(θ+240°) Where K is the change of the isolation transformer (5) Or four-wire two-phase resolver signal output, that is: Vs1-s3=KEo sinωt sinθ Vs4-s2=KEo sinωt cosθ.

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