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High precision velocity simulate given circuit

A speed simulation, high-precision technology, applied in the direction of logic circuit connection/interface layout, electrical components, electronic switches, etc., can solve the problem that the accuracy of analog-to-digital conversion is only 8 or 10 bits, and achieve the effect of suppressing common-mode interference signals

Inactive Publication Date: 2008-06-18
AUTOMATION RES & DESIGN INST OF METALLURGICAL IND
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  • Abstract
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Problems solved by technology

[0002] At present, in the technical field of AC motor drives, the analog setting method of speed is generally adopted by using the on-chip analog channel of a single-chip microcomputer or a digital signal processor (DSP). Although this method is simple, the modulus that they can provide The conversion precision is only 8 or 10 digits, and advanced processors only have 12 digits of precision

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  • High precision velocity simulate given circuit
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Embodiment Construction

[0013] Figure 1 and Figure 2 are an embodiment of the present invention.

[0014] In Fig. 1, a high-precision speed analog given circuit includes differential analog voltage input ports, differential receiving circuit A1, analog optical isolation A2, A / D conversion circuit A3 and a serial peripheral interface (SPI) The processor A4 is characterized in that the differential analog voltage input is connected to the differential receiving circuit A1, the differential receiving circuit A1 is connected to the analog optical isolation A2, the analog optical isolation A2 is connected to the A / D conversion circuit A3, and the A / D conversion circuit A3 is connected to the Processor A4 with SPI port is connected through SPI port.

[0015] In Fig. 2, the differential analog voltage input port includes three interfaces such as -IN, +IN and AGND1.

[0016] The differential receiving circuit is composed of U2, capacitors C1 and C2, where U2 is a general analog differential receiving chip, ...

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Abstract

The invention provides a high-precision simulation given circuit, belonging to the AC motor driver technical field. The invention comprises a differential simulation voltage input terminal, a differential receiving circuit, a simulation optical screen, an A / D converter circuit and a processor with a serial peripheral interface SPI. The differential simulation voltage input is connected with the differential receiving circuit which is connected with the simulation optical screen which is connected with A / D converter circuit which is connected with the processor with the SPI interface through the SPI interface. The invention has the advantages of implementing high-precision speed simulation giving and restraining the common mode interference signals on a transmission line.

Description

technical field [0001] The invention belongs to the technical field of AC motor drivers, and in particular provides a high-precision speed analog setting circuit, which is suitable for the speed analog setting of AC motor drivers. Background technique [0002] At present, in the technical field of AC motor drives, the analog setting method of speed is generally adopted by using the on-chip analog channel of a single-chip microcomputer or a digital signal processor (DSP). Although this method is simple, the modulus that they can provide The conversion precision is only 8 or 10 bits, and advanced processors only have 12-bit precision. [0003] The AC motor driver generally requires the higher the given speed accuracy, the better, which can improve the steady-state speed accuracy of the driver. Contents of the invention [0004] The purpose of the present invention is to provide a high-precision speed analog given circuit, which improves the steady-state speed precision of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P25/00H02P27/00H03M1/12H03K19/0175H03K17/78
Inventor 金传付房庆海
Owner AUTOMATION RES & DESIGN INST OF METALLURGICAL IND