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Single power supply CMOS integrated circuit autosyn / rotary transformer - digital conversion technique

A resolver and self-aligning machine technology, applied in the direction of using electric/magnetic devices to transmit sensing components, etc., can solve the problems of large volume, high cost, and the inability to realize high-density installation of system components

Active Publication Date: 2008-10-08
连云港杰瑞电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are two ways to realize the digital conversion of the self-aligning machine / resolver. One is to use the special chip assembly produced by foreign companies. Due to the high price of the special chip, the cost of the product is higher than other angle measurement methods.
One is an encoding circuit composed of discrete components such as D / A converters, operational amplifiers, and resistor networks. This conversion method adopts a split structure, which inevitably requires the use of a large number of discrete components, and has the following disadvantages: large volume, component The distribution is relatively scattered, and high-density installation of system components cannot be realized, and the volume is relatively large
Poor reliability, a large number of discrete components are used, and the integration level is low, which reduces the reliability of the system

Method used

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  • Single power supply CMOS integrated circuit autosyn / rotary transformer - digital conversion technique
  • Single power supply CMOS integrated circuit autosyn / rotary transformer - digital conversion technique
  • Single power supply CMOS integrated circuit autosyn / rotary transformer - digital conversion technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] Example 1. A single-power supply CMOS integrated circuit synchro / resolver-to-digital conversion technology, which digitizes the synchro signal / resolver signal, converts the synchro signal / resolver signal into a binary digital signal, It consists of a solid-state control transformer circuit, an AC error amplifier circuit, a phase-sensitive demodulation circuit, an integral circuit, a voltage-controlled oscillation circuit and a digital control circuit; it adopts a standard CMOS integrated circuit process with a single power supply, and integrates the above circuits on a single chip , to achieve the conversion from angle to number.

Embodiment 2

[0101] Example 2. In the conversion technology described in Embodiment 1, the three-wire input synthesizer signal or the four-wire input resolver signal is converted into low-voltage sine-cosine signals V1 and V2, and the digital angle φ generated by the reversible counter is controlled by the solid state. The summation in the transformer circuit outputs an error signal KEoSin(θ-φ) after passing through the AC error amplifier circuit. This error signal passes through a closed-loop circuit composed of a phase-sensitive demodulation circuit, an integrating circuit, a voltage-controlled oscillation circuit and a digital control circuit. Find the zero point of Sin(θ-φ); when this process is completed, the digital angle φ of the digital control circuit is equal to the signal input shaft angle θ.

Embodiment 3

[0102] Example 3. In the conversion technology described in Embodiment 1, the solid-state control transformer circuit adopts a high 6-bit subdivision circuit and a low 10-bit subdivision circuit, and the high 6-bit subdivision circuit decomposes the angle variation 0°-360° to 0°-5.625 °, the lower 10-bit subdivision circuit uses a D / A converter with R-2R resistors to form an analog multiplier to realize the conversion from analog angle to digital angle within the range of 0°-5.625°.

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Abstract

The invention is a digital converting technology for a single power source CMOS integrated circuit differential synchro / rotating transformer, characterized in that the technology processes the digital treatment for the differential synchro / rotating transformer signal, and converts the differential synchro / rotating transformer signal as the binary digital signal which is composed of a solid control transformer circuit, a alternative current error amplifier circuit, a phase-sensitive demodulating circuit, an integral circuit, a voltage control shaking circuit and a digital control circuit; the technology uses the standard CMOS integrated circuit technique of the single power source for integrating the circuit on the single chip to achieve the digital converting from the angle quantity. The invention has high precision, low cost which can achieve the high density installation of the system component.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, in particular to a single-power general-purpose CMOS integrated circuit autosynchronizer / resolver-digital conversion technology. Background technique [0002] The self-aligning machine is an induction electromechanical component, which is used in automatic control, synchronous transmission and calculation solution system to convert the rotation angle of the rotating shaft into an electrical signal, or convert the electrical signal into the rotation angle of the rotating shaft, so as to realize the long-distance transmission of angle data Send, receive and transform to achieve the purpose of automatically indicating angle, position, distance and command. [0003] A resolver is a signal element whose output voltage varies with the rotor angle. When the excitation winding is excited by an AC voltage of a certain frequency, the function relationship between the voltage of the output wind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/14
Inventor 徐大林陈大科郭俊彦方纪村高文政程蜀炜
Owner 连云港杰瑞电子有限公司
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