Dual-bandwidth integrating circuit in resolver-to-digital converter and switching control method

Abstract

The invention relates to a dual-bandwidth integrating circuit in a resolver-to-digital converter and a switching control method, the switching control circuit is matched with the dual-bandwidth integrating circuit, and the switching control circuit is composed of an operational amplifier, a logic gate, an analog switch, a resistor and a capacitor. Switching control is realized by receiving an output signal Ue of a phase demodulation circuit in the converter from the resolver to the digital converter, a component selection signal SHIFT and a pre-charging amplification factor control signal UP / DN, and finally a speed voltage VEL is output to a voltage control circuit in the digital converter to complete conversion from the resolver to the digital converter. Compared with a traditional resolver-to-digital conversion circuit, two bandwidth component selections are provided in an internal integral circuit of the converter, and switching between low resolution and high rotating speed requirements and high resolution and low rotating speed requirements can be realized.

Description

technical field [0001] The present invention relates to the technical field of analog signal to digital conversion, in particular to a dual-bandwidth integral circuit in a resolver-to-digital converter, and also relates to a switching control method for the dual-bandwidth integral circuit in a resolver-to-digital converter. Background technique [0002] The resolver-to-digital converter is one of the key devices in the servo control system. It is used in the system to digitize the position / angle analog quantity, and is connected to the host computer through a standard interface circuit to realize real-time position / angle data information. Read; resolver to digital converter products are mainly used in important weapon systems such as aerospace, aviation, weapons, and ships. [0003] Resolver-to-digital converters are usually designed with signal conditioning circuits, solid-state control transformers, AC amplifiers, synthetic references, phase demodulation, integrators, volt...

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Problems solved by technology

[0003] Resolver-to-digital converters are usually designed with signal conditioning circuits, solid-state control transformers, AC amplifiers, synthetic references, phase demodulation, integrators, voltage-controlled oscillators, reversible counters, etc., which can realize resolver-to-digital signal conversion; The integral circuit in some converters is a single-bandwidth integral circuit, which can only meet one of the two functions of high speed, low resolution, or low speed, and high resolution, and cannot quickly switch between high speed requirements and high resolution requirements ; When the system has different requirements for high speed and high resolution at different time points, the existing technology cannot meet the requirements

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