Encoder power supply circuit with positive and negative connection function

Abstract

The application discloses an encoder power supply circuit with positive and negative connection functions, comprising diodes D1, D2, D3 and D4 connected in a bridge mode, the diodes D1, D2, D3 and D4 forming a bridge circuit, the input ends of the bridge circuit being connected with external power input INA and INB, and the output ends AO and BO of the bridge circuit being used for supplying power to an encoder load. The application has the advantages that the positive connection and the negative connection of the power supply line connected with the encoder can normally work, the flexibility and adaptability of the encoder are improved, and the failure rate of the encoder is reduced.

Description

Technical Field

[0001] This application relates to the field of encoder technology, and in particular to an encoder power supply circuit with positive and negative connection functions. Background Technology

[0002] Currently, encoders are becoming increasingly important in the servo system field, and as high-precision products, their protection is particularly crucial. Encoder protection circuits mainly employ the following two methods: 1. Using diodes, the forward conduction and reverse cutoff characteristics of diodes are utilized to achieve reverse connection protection; 2. Utilize MOSFET characteristics to achieve reverse connection protection.

[0003] Current protection methods can only protect the circuit from reverse connection. When reverse connection occurs, the encoder cannot work properly, causing inconvenience to the installation and maintenance of the encoder. Summary of the Invention

[0004] This application provides an encoder power supply circuit with positive and negative connection functions. Its advantage is that the encoder can work normally whether the power line is connected in the positive or negative direction, which improves the flexibility and adaptability of the encoder and reduces the encoder failure rate.

[0005] The above-mentioned objective of this application is achieved through the following technical solution: an encoder power supply circuit with positive and negative connection function, characterized in that it includes diodes D1, D2, D3, and D4 connected in a bridge manner. Diodes D1, D2, D3, and D4 form a bridge circuit. The input terminals of the bridge circuit are connected to external power inputs INA and INB, and the output terminals AO and BO of the bridge circuit supply power to the encoder load.

[0006] Furthermore, diodes D1, D2, D3, and D4 are selected as voltage drop diodes, model number Dongke DK5V60R25H.

[0007] Furthermore, diodes D1, D2, D3, and D4 are each connected in series with a magnetic bead.

[0008] Furthermore, diodes D1, D2, D3, and D4 are each connected in parallel with capacitors.

[0009] Furthermore, it also includes a power switching module and a battery. The output terminals AO and BO of the bridge circuit and the battery are all connected to the power switching module, which is used to switch power supply.

[0010] In summary, the beneficial effects of this application are: whether the encoder power supply is connected in the positive or negative direction, the circuit can convert the output to match the encoder load, and the encoder can work normally, improving the encoder's flexibility and adaptability, and reducing the encoder failure rate. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the circuit structure of an embodiment of this application; Figure 2 This is a schematic diagram of the circuit structure of another embodiment of this application; Figure 3 This is a schematic diagram of the circuit structure of another embodiment of this application; Figure 4 This is a schematic diagram of the circuit structure of another embodiment of this application. Detailed Implementation

[0012] The specific embodiments of this application are described in detail below with reference to the accompanying drawings.

[0013] Example 1: An encoder power supply circuit with positive and negative connection function, reference Figure 1 It includes diodes D1, D2, D3, and D4 connected in a bridge configuration. Diodes D1, D2, D3, and D4 form a bridge circuit. The input terminals of the bridge circuit are connected to external power inputs INA and INB, and the output terminals AO and BO of the bridge circuit power the encoder load.

[0014] The circuit described above can be packaged as a chip, or it can be implemented using a dedicated ASIC to achieve modular design.

[0015] Diodes D1, D2, D3, and D4 are selected as voltage drop-free diodes, model number Dongke DK5V60R25H.

[0016] Example 2: Based on Example 1, with reference to Figure 2 The output of the bridge circuit is connected to the encoder switching unit, which also includes a battery (BAT). The battery (BAT) is connected to the encoder switching unit, which is used to switch the power supply. When the voltage at the AO terminal is high, the encoder is powered by the AO terminal; when the voltage at the AO terminal is low, the power supply switches to the battery (BAT). The encoder switching unit uses a diode switching scheme, that is, a diode is connected in series after the AO terminal and the battery terminal, and then connected in parallel as the output.

[0017] Example 3: Based on Example 1, diodes D1, D2, D3, and D4 are connected in series with ferrite beads, and diodes D1, D2, D3, and D4 are connected in parallel with capacitors. (Refer to...) Figure 3A series ferrite bead is used to suppress high-frequency noise and spike interference, and a parallel capacitor is used to reduce high-frequency interference.

[0018] It also includes a power switching module and a battery, such as Figure 4 The output terminals AO and BO of the bridge circuit and the battery are all connected to the power switching module, which is used to switch the power supply.

[0019] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of this application, and these all fall within the protection scope of this application.

Claims

1. An encoder power supply circuit with positive and negative connection function, characterized in that, The circuit includes diodes D1, D2, D3, and D4 connected in a bridge configuration. These diodes form a bridge circuit. The input terminals of the bridge circuit are connected to external power inputs INA and INB, while the output terminals AO and BO power the encoder load.

2. The encoder power supply circuit with the function of positive and negative connection according to claim 1, characterized in that, Diodes D1, D2, D3, and D4 are selected as voltage drop-free diodes, model number Dongke DK5V60R25H.

3. The encoder power supply circuit with the function of positive and negative connection according to claim 1, characterized in that, Diodes D1, D2, D3, and D4 are connected in series with magnetic beads.

4. The encoder power supply circuit with the function of positive and negative connection according to claim 1, characterized in that, Diodes D1, D2, D3, and D4 are each connected in parallel with a capacitor.

5. The encoder power supply circuit with the function of positive and negative connection according to claim 1, characterized in that, It also includes a power switching module and a battery. The output terminals AO and BO of the bridge circuit and the battery are all connected to the power switching module, which is used to switch power supply.

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