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UVW encoder signal processing circuit

A signal processing circuit and encoder technology, applied in the direction of a single motor speed/torque control, monitoring commutation, etc., can solve the problems of high cost, complex fault detection and alarm circuits, and achieve low-cost, high-performance real-time fault alarms , the effect of high-performance signal processing

Inactive Publication Date: 2008-05-14
SHANGHAI STEP ELECTRIC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such a line makes the fault detection and alarm circuit more complicated and expensive

Method used

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  • UVW encoder signal processing circuit
  • UVW encoder signal processing circuit
  • UVW encoder signal processing circuit

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Embodiment Construction

[0013] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0014] It can be seen from Fig. 4 that the present invention includes: a fault detection and alarm module; -, W1+ / W1- respectively correspond to the fault detection circuit composed of input to the corresponding XOR gate (U8A, U8B, U8C, U8D, U10A, U10B), and the fault alarm composed of the output terminal and the NAND gate or AND gate The circuit is connected; the NAND gate or the AND gate outputs a signal through the 28th resistor R28;

[0015] A 29th resistor R29 and a 30th resistor R30 can also be connected in parallel between the input terminal of the NAND gate or the AND gate and the power supply.

[0016] In the present invention, the six-way differential signals of the UVW encoder are first filtered and polarized, and then respectively enter the fault detection circuit formed by the XOR gate to detect the validity of the encoder signal, ...

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Abstract

The invention relates to a UVW encoder signal processing circuit, which includes a failure detection alarm module. The failure detection alarm module consists of a failure detection circuit which is composed of six relevant exclusive-or gates (U8A, U8B, U8C, U8D, U10A, U10B) which are respectively corresponding to A1+ / A1-, B1+ / B1-, Z1+ / Z1-, U1+ / U1-, V1+ / V1-, and W1+ / W1- respectively, the output terminal is connected with the failure detection circuit which is composed of a nand gate or a gate; the nand gate or the gate outputs signal through a 28th resistance (R28). The invention has the beneficial effect that the invention realizes high efficient signal processing of UVW encoder with very low cost and real-time fault alarm.

Description

technical field [0001] The invention relates to a motor speed closed-loop control technology, in particular to a fault detection and alarm circuit in a UVW encoder signal processing circuit. Background technique [0002] At present, the speed closed-loop control technology is one of the most widely used technologies in the motor closed-loop control technology. It can improve the quality of products or services and improve the product manufacturing process. For synchronous motors, to achieve speed closed-loop control, there are two types of encoders that can be used, one is UVW square wave encoder, and the other is SIN / COS analog signal encoder. [0003] It can be seen from Figure 1 and Figure 2 that the six-way differential signals of the UVW encoder are filtered and polarized first, and then the six-way differential signals are reshaped by the differential signal processing chip to obtain the shaped output signal; the fault detection and alarm module is to filter and polari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/06H02P6/12
Inventor 冯子龙张永红邵雷陈辰
Owner SHANGHAI STEP ELECTRIC