CN-224202465-U - Resolver decoding device

CN224202465UCN 224202465 UCN224202465 UCN 224202465UCN-224202465-U

Abstract

The utility model discloses a rotary transformer decoding device which comprises a rotary transformer decoding chip with the model of SC2161, a control module, an excitation amplifying module and a signal conditioning module, wherein the rotary transformer decoding chip is connected with the control module, the excitation amplifying module and the signal conditioning module, and the rotary transformer is connected with the excitation amplifying module and the signal conditioning module. Compared with the prior art, the SC2161 chip with strong stability and strong anti-interference capability is adopted to decode the rotary transformer, so that the reliability and stability of a decoding result can be ensured, and meanwhile, the SC2161 chip has high resolution, can accurately detect the tiny change of an output signal of the rotary transformer, and further improves the accuracy of the decoding result.

Inventors

YUAN HONGYUE
HU JUN
Meng Zongliu
GUO FENG
YIN HUA

Assignees

五羊-本田摩托(广州)有限公司

Dates

Publication Date: 20260505
Application Date: 20250327

Claims (7)

1. The rotary transformer decoding device is characterized by comprising a rotary transformer decoding chip with the model of SC2161, a control module, an excitation amplifying module and a signal conditioning module; the rotary-transformation decoding chip is connected with the control module, the excitation amplifying module and the signal conditioning module, the rotary transformer is connected with the excitation amplifying module and the signal conditioning module; The excitation amplifying module comprises two excitation amplifying units with the same structure, and the excitation amplifying units comprise an operational amplifying circuit and an excitation push-pull output circuit; The operational amplifier amplifying circuit is connected with the rotary transformation decoding chip and the excitation push-pull output circuit, and the excitation push-pull output circuit is connected with the rotary transformer; The operational amplifier circuit comprises a first operational amplifier, a second operational amplifier, a first resistor, a second resistor and a capacitor; The first resistor is connected with the rotary decoding chip; the first operational amplifier is connected with the second operational amplifier, the first resistor, the second resistor, the capacitor and the reference voltage; The excitation push-pull output circuit comprises a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a first diode, a second diode, a first triode and a second triode; One end of the third resistor sequentially passes through the fourth resistor, the first diode, the second diode, the fifth resistor, the sixth resistor, the second triode, the eighth resistor, the seventh resistor and the first triode to be connected with the other end of the third resistor; the base electrode of the first triode is connected with the common connection point of the third resistor and the fourth resistor, the base electrode of the second triode is connected with the common connection point of the fifth resistor and the sixth resistor, the power supply voltage is connected with the common connection point of the collector electrode of the first triode and the third resistor, and the common connection point of the collector electrode of the second triode and the sixth resistor is grounded; The second operational amplifier is connected with a common connection point of the first diode and the second diode, and a common connection point of the seventh resistor and the eighth resistor.
2. The resolver decoding apparatus according to claim 1, wherein the signal conditioning module includes a sine signal conditioning circuit and a cosine signal conditioning circuit; the rotary-transformer decoding chip is connected with the sine signal conditioning circuit and the cosine signal conditioning circuit; the rotary transformer is connected with the sine signal conditioning circuit and the cosine signal conditioning circuit.
3. The resolver decoding apparatus according to claim 2, wherein the sinusoidal signal conditioning circuit includes a ninth resistor, a tenth resistor, and an eleventh resistor; The rotary transformer is connected with the tenth resistor and the eleventh resistor, and the ninth resistor is connected with the tenth resistor and the eleventh resistor.
4. The resolver decoding apparatus according to claim 2, wherein the cosine signal conditioning circuit includes a twelfth resistor, a thirteenth resistor, and a fourteenth resistor; The rotary transformer is connected with the thirteenth resistor and the fourteenth resistor, and the twelfth resistor is connected with the thirteenth resistor and the fourteenth resistor.
5. The resolver decoding apparatus according to claim 1, wherein the first operational amplifier and the second operational amplifier are operational amplifiers of model LM 324.
6. The resolver decoding device according to claim 1, wherein the control module comprises a main control chip, and the main control chip is connected with the resolver decoding chip.
7. The resolver decoding apparatus according to claim 6, wherein the main control chip is a chip of model STM32F103C8T 6.

Description

Resolver decoding device Technical Field The utility model relates to the technical field of rotary transformer decoding, in particular to a rotary transformer decoding device. Background The rotary transformer (abbreviated as rotary transformer) is widely applied as an angle sensor in the fields of servo systems, motor control and the like, and the output of the rotary transformer is an analog electric signal which can be processed by a digital system only after being converted into a digital signal by a decoding device. However, the conventional decoding device has the problems of low integration level, many peripheral devices and the like, which results in large system volume, high cost and poor stability, and some decoding devices have poor anti-interference capability, and in a complex industrial environment, there are factors such as electromagnetic interference, temperature change and the like, which cause signals output by the rotation change to be interfered by noise, while the conventional decoding device lacks an effective anti-interference mechanism, so that deviation occurs in decoding results, and the reliability and stability of the system are affected. Therefore, the conventional decoding apparatus cannot ensure the reliability and stability of the decoding result. Disclosure of utility model In order to overcome the defects of the prior art, the utility model aims to provide a rotary transformer decoding device which decodes a rotary transformer by adopting an SC2161 chip with strong stability and strong anti-interference capability so as to ensure the reliability and stability of decoding results. In order to solve the problems, the utility model is realized according to the following scheme: The rotary transformer decoding device comprises a rotary transformer decoding chip with the model of SC2161, a control module, an excitation amplifying module and a signal conditioning module; the rotary-transformation decoding chip is connected with the control module, the excitation amplifying module and the signal conditioning module, and the rotary transformer is connected with the excitation amplifying module and the signal conditioning module. Compared with the prior art, the rotary transformer decoding device has the beneficial effects that the SC2161 chip with strong stability and strong anti-interference capability is adopted to decode the rotary transformer, so that the reliability and stability of a decoding result can be ensured, and meanwhile, the SC2161 chip has high resolution, the tiny change of an output signal of the rotary transformer can be accurately detected, and the accuracy of the decoding result is further improved. Optionally, the excitation amplifying module comprises two excitation amplifying units with the same structure, and the excitation amplifying units comprise an operational amplifying circuit and an excitation push-pull output circuit; the operational amplifier circuit is connected with the rotary decoding chip and the excitation push-pull output circuit, and the excitation push-pull output circuit is connected with the rotary transformer. Optionally, the operational amplifier circuit includes a first operational amplifier, a second operational amplifier, a first resistor, a second resistor and a capacitor; The first resistor is connected with the rotary decoding chip, the second operational amplifier is connected with the excitation push-pull output circuit, and the first operational amplifier is connected with the second operational amplifier, the first resistor, the second resistor, the capacitor and the reference voltage. Optionally, the excitation push-pull output circuit includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a first diode, a second diode, a first triode and a second triode; One end of the third resistor sequentially passes through the fourth resistor, the first diode, the second diode, the fifth resistor, the sixth resistor, the second triode, the eighth resistor, the seventh resistor and the first triode to be connected with the other end of the third resistor; the base electrode of the first triode is connected with the common connection point of the third resistor and the fourth resistor, the base electrode of the second triode is connected with the common connection point of the fifth resistor and the sixth resistor, the power supply voltage is connected with the common connection point of the collector electrode of the first triode and the third resistor, and the common connection point of the collector electrode of the second triode and the sixth resistor is grounded; The second operational amplifier is connected with a common connection point of the first diode and the second diode, and a common connection point of the seventh resistor and the eighth resistor. Optionally, the signal conditioning module includes a sine signal conditioning circuit and a cosine signal cond