Electrical control system of polishing machine

Abstract

The electrical control system comprises a single chip microcomputer, a power supply circuit supplies power to a temperature acquisition circuit, a motor driving and current sampling circuit, a rotor position detection circuit, an anti-galloping circuit and the single chip microcomputer, and the anti-galloping circuit comprises a first connection point and a second connection point. The first connection point is connected with a pin 4 of the single chip microcomputer, the second connection point is connected with the motor driving and current sampling circuit, a resistor R44, an MOS tube Q3 and a resistor R42 are sequentially arranged between the first connection point and the second connection point, the anti-galloping circuit further comprises a resistor R43 and a capacitor C19, and the resistor R43 and the capacitor C19 are connected in parallel and then connected between the MOS tube and the resistor R42. According to the polisher, through the anti-galloping circuit, when the polisher breaks down and other problems occur, a power source can be cut off in time, and the risk of the polisher in the using process is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of polishing machine control, in particular to an electrical control system of a polishing machine. Background Art

[0002] A polishing machine is an electric tool for processing the surface of materials or products. According to the requirements of the materials or products, different polishing heads need to be selected to process the surface of the materials or products so that the surface of the materials or products can achieve mirror finish, super mirror finish, brushed finish and other processing effects.

[0003] The existing polishing machine needs to be used in conjunction with a controller during use, but the existing controller has many functions and does not have corresponding protection functions. Summary of the invention

[0004] The object of the present invention is to provide an electrical control system for a polishing machine to solve the above technical problems.

[0005] To achieve the above object, the present invention provides the following technical solutions: An electrical control system for a polishing machine, characterized in that it includes a single-chip microcomputer, the single-chip microcomputer is connected to a power supply circuit, a temperature acquisition circuit, a motor drive and current sampling circuit, a rotor position detection circuit and an anti-runaway circuit, wherein the power supply circuit is powered by the temperature acquisition circuit, the motor drive and current sampling circuit, the rotor position detection circuit, the anti-runaway circuit and the single-chip microcomputer, the temperature acquisition circuit is used to collect the temperature of the MOS tube in the motor drive and current sampling circuit, the motor drive, the rotor position detection circuit is used to detect the rotor position of the motor, the anti-runaway circuit is used to protect the polishing machine, the anti-runaway circuit is connected to the 4 pins of the single-chip microcomputer, and is connected to the motor drive and current sampling circuit. The circuit is connected to control the motor to stop. The anti-flying circuit includes a first connection point and a second connection point. The first connection point is connected to pin 4 of the single-chip microcomputer, and the second connection point is connected to the motor drive and current sampling circuit. Resistor R44, MOS tube Q3 and resistor R42 are arranged between the first connection point and the second connection point in sequence. The resistor R44 is connected to the drain of the MOS tube Q3, the source of the MOS tube Q3 is grounded, and the resistor R42 is connected to the gate of the MOS tube Q3. The anti-flying circuit also includes a resistor R43 and a capacitor C19. The resistor R43 and the capacitor C19 are connected in parallel and connected between the MOS tube and the resistor R42.

[0006] The present invention is further arranged that the motor drive and current sampling circuit includes a U-phase part, a V-phase part and a W-phase part, and the U-phase part, the V-phase part and the W-phase part all include access points H, O, L and access point B+, the access points H, O and L are connected to the connection pins on the single-chip microcomputer correspondingly, the access point B+ is connected to the second connection point in the anti-flying circuit, a first resistor and a first MOS tube are arranged between the access point H and the access point B+, a second resistor is arranged between the access point O and the first MOS tube, a second MOS tube and a third resistor are arranged between the access point L and the first MOS tube, a fourth resistor is arranged between the first resistor and the second resistor, the third resistor is connected to a fifth resistor, and the fifth resistors of the U-phase part, the V-phase part and the W-phase part are connected to each other and connected to resistor R25.

[0007] The present invention is further arranged that the resistor R25 is connected with a resistor R39, a resistor R40, and a resistor R41, the resistor R41 is connected with the 13th pin of the single-chip microcomputer, a connection point OP1-0 is provided between the resistor R41 and the resistor R40 for connecting with the 14th pin of the single-chip microcomputer, a connection point OP1-N is provided between the resistor R40 and the resistor R39 for connecting with the 15th pin of the single-chip microcomputer, and the fifth resistor of the W-phase part is also connected with R38, the resistor R38 is connected with OP1-P and connected with the 16th pin of the single-chip microcomputer.

[0008] The present invention is further arranged that the rotor position detection circuit is provided with 3 paths, which are respectively connected to the U phase part, the V phase part and the W phase part, and each path is respectively connected to pin 1, pin 2 and pin 3 of the single chip microcomputer, and the rotation position detection circuit includes resistor 1, resistor 2 and capacitor 1, wherein resistor 1 is connected to resistor 2 and then grounded, resistor 2 is connected in parallel with capacitor 1, and capacitor 1 is connected to point Bef.

[0009] The present invention further provides that a portion between the first MOS transistor and the second MOS transistor is connected to a corresponding rotor position detection circuit.

[0010] The present invention is further arranged that the temperature acquisition circuit is connected to pin 17 of the single-chip microcomputer and the temperature acquisition circuit is connected to the power supply circuit, the temperature acquisition circuit includes an input end connected to the power supply circuit and a connection end connected to the single-chip microcomputer, the input end is connected to a resistor R16 and a thermistor RNTC1, the thermistor is grounded, the resistor R16 is connected to the connection end, and is connected to a capacitor C10, and the capacitor C10 is grounded.

[0011] The present invention is further configured that the system also includes a speed adjustment circuit for controlling the speed of the polishing machine, the speed adjustment circuit includes a pressure input point, a switch S2, a switch S3 and a switch S1, wherein the switch S1 is a switch for controlling the opening and closing of the polishing machine, the switch S2 is connected to a resistor R20, and the switch S3 is connected to a resistor R21.

[0012] The present invention is further arranged that the speed adjustment circuit is connected to an intermediate circuit for receiving an adjustment signal, and the intermediate circuit is connected to pin 6 of the single-chip microcomputer.

[0013] The present invention is further configured that the system also includes a download port module.

[0014] The present invention is further arranged that the output voltage of the power supply part is 5V.

[0015] Beneficial effects of the present invention: The present invention is directed to a polishing machine through an anti-runaway circuit. When the polishing machine has problems such as failures, the power supply can be cut off in time to reduce the risk of the polishing machine during use, wherein the use of a MOS tube can be used in conjunction with the anti-runaway circuit. When the load of the polishing machine exceeds the set value, the MOS tube can quickly disconnect the circuit to avoid damage caused by overload. The MOS tube has a lower on-resistance, which can reduce energy loss and improve circuit efficiency compared to traditional mechanical switches. This is particularly important in polishing machines that run for a long time.

[0016] In addition, a temperature acquisition circuit is set up, which is combined with the motor drive and current sampling modules to realize the temperature acquisition of the MOS tubes in the motor drive and current sampling modules, thereby realizing over-temperature protection for the polishing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 The electrical schematic diagram of the single chip microcomputer according to the embodiment of the present invention.

[0018] Figure 2 1 is an electrical schematic diagram of a power supply circuit according to an embodiment of the present invention.

[0019] Figure 3 The figure is an electrical schematic diagram of a temperature acquisition circuit according to an embodiment of the present invention.

[0020] Figure 4 The figure is an electrical schematic diagram of the speed adjustment circuit and the intermediate circuit according to an embodiment of the present invention.

[0021] Figure 5 The figure is an electrical schematic diagram of the anti-runaway circuit according to an embodiment of the present invention.

[0022] Figure 6 The figure is an electrical schematic diagram of a motor drive and current sampling circuit according to an embodiment of the present invention.

[0023] Figure 7 4 is an electrical schematic diagram of a liquid crystal panel according to an embodiment of the present invention.

[0024] Figure 8 This is an electrical schematic diagram of the download port module according to an embodiment of the present invention.

[0025] Fig. 9 This is an electrical schematic diagram of rotor position detection according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0027] like Figure 1-Figure 9 As shown, the present invention provides an electrical control system for a polishing machine, including a single-chip microcomputer, wherein the single-chip microcomputer is connected to a power supply circuit, a temperature acquisition circuit, a motor drive and current sampling circuit, a rotor position detection circuit and an anti-runaway circuit, wherein the power supply circuit supplies power to the temperature acquisition circuit, the motor drive and current sampling circuit, the rotor position detection circuit, the anti-runaway circuit and the single-chip microcomputer, and the output voltage of the power supply part is 5V. The temperature acquisition circuit is used to collect the temperature of the MOS tube in the motor drive and current sampling circuit, the motor drive, the rotor position detection circuit is used to detect the rotor position of the motor, the anti-runaway circuit is used to protect the polishing machine, the anti-runaway circuit is connected to the 4th pin of the single-chip microcomputer, and is connected to the motor drive and current sampling circuit, and is used to control the motor to stop. The anti-runaway circuit includes a first connection point and a second connection point, wherein the first connection point and the second connection point are respectively recorded as DUANDIAN and B+, the first connection point is connected to the 4th pin of the single-chip microcomputer, the second connection point is connected to the motor drive and current sampling circuit, and a resistor R44, a MOS tube Q3 and a resistor R42 are sequentially arranged between the first connection point and the second connection point, the resistor R44 is connected to the drain of the MOS tube Q3, the source of the MOS tube Q3 is grounded, and the resistor R42 is connected to the gate of the MOS tube Q3. The anti-runaway circuit also includes a resistor R43 and a capacitor C19, and the resistor R43 and the capacitor C19 are connected in parallel and connected between the MOS tube and the resistor R42.

[0028] refer to Figure 6In this embodiment, the motor drive and current sampling circuit includes a U-phase part, a V-phase part and a W-phase part. The U-phase part, the V-phase part and the W-phase part all include access points H, O, L and access point B+. According to different parts, the U-phase part respectively records the access points as: UH, UO, UL, the V-phase part respectively records the access points as VH, VO, VL, the W-phase part respectively records the access points as WH, WO, WL, and the access points UH, UO, UL, VH, VO, The connection pins on the microcontroller corresponding to VL, WH, WO, and WL are 35, 34, 27, 32, 31, 26, 29, 28, and 25; the access point B+ is connected to the second connection point B+ in the anti-flying circuit, a first resistor and a first MOS tube are arranged between the access point H and the access point B+, a second resistor is arranged between the access point O and the first MOS tube, a second MOS tube and a third resistor are arranged between the access point L and the first MOS tube, and the first resistor and A fourth resistor is arranged between the second resistors, the third resistor is connected to a fifth resistor, the fifth resistors of the U phase part, the V phase part and the W phase part are connected to each other and connected to the resistor R25. Specifically, in the U phase part, the V phase part and the W phase part, the first resistors are R22, R27 and R32, the second resistors are R24, R29, R34, the third resistors are R37, R30, R35, the fourth resistors are R23, R28, R33, and the fifth resistors are R26, R31, R36. The first MOS tubes are Q5, Q7, Q9, and the second MOS tubes are Q6, Q8 and Q10. The part between the first MOS tube and the second MOS tube is connected to the corresponding rotor position detection circuit, that is, the circuit between the first MOS tube and the second MOS tube is connected to the rotor position detection circuit.

[0029] In this embodiment, the resistor R25 is connected to resistor R39, resistor R40, and resistor R41. The resistor R41 is connected to pin 13 of the single-chip microcomputer. A connection point OP1-0 is provided between the resistor R41 and the resistor R40 for connecting to pin 14 of the single-chip microcomputer. A connection point OP1-N is provided between the resistor R40 and the resistor R39 for connecting to pin 15 of the single-chip microcomputer. The fifth resistor of the W-phase part is also connected to R38. The resistor R38 is connected to OP1-P and to pin 16 of the single-chip microcomputer.

[0030] Among them, the rotor position detection circuit is provided with 3 paths, which are respectively connected to the U phase part, the V phase part and the W phase part, and each path is respectively connected to the 1st pin, the 2nd pin and the 3rd pin of the single chip computer. The rotation position detection circuit includes resistor 1, resistor 2 and capacitor 1, wherein resistor 1 is connected to resistor 2 and then grounded, the resistor 2 is connected in parallel with capacitor 1, and capacitor 1 is connected to point Bef. The resistor 1 in each path is respectively: R10, R12, R14; the resistor 2 is respectively R11, R13, R15; the capacitor 1 is respectively C15, C16 and C17.

[0031] The temperature acquisition circuit is connected to pin 17 of the single-chip microcomputer and is connected to the power supply circuit. The temperature acquisition circuit includes an input end connected to the power supply circuit and a connection end connected to the single-chip microcomputer. The input end is connected to a resistor R16 and a thermistor RNTC1, and the thermistor is grounded. The resistor R16 is connected to the connection end and is connected to a capacitor C10, and the capacitor C10 is grounded.

[0032] The system also includes a speed adjustment circuit for controlling the speed of the polishing machine, and the speed adjustment circuit includes a pressure input point, a switch S2, a switch S3 and a switch S1, wherein the switch S1 is a switch for controlling the opening and closing of the polishing machine, the switch S2 is connected to a resistor R20, and the switch S3 is connected to a resistor R21. S2 and S3 are speed adjustment switches, like Figure 4 The speed adjustment circuit is connected with an intermediate circuit for receiving an adjustment signal, and the intermediate circuit is connected to pin 6 of the single chip microcomputer. The intermediate circuit and the speed adjustment circuit are concentrated on the liquid crystal panel.

[0033] like Figure 8 As shown, the system also includes a download port module.

[0034] The present invention is directed to a polishing machine, through an anti-runaway circuit, when the polishing machine has problems such as failures, the power supply can be cut off in time to reduce the risk of the polishing machine during use, wherein the use of a MOS tube can be used in conjunction with the anti-runaway circuit. When the load of the polishing machine exceeds a set value, the MOS tube can quickly disconnect the circuit to avoid damage caused by overload. The MOS tube has a lower on-resistance, which can reduce energy loss and improve circuit efficiency compared to traditional mechanical switches. This is particularly important in a polishing machine that runs for a long time. In addition, a temperature acquisition circuit is also provided, which is combined with a motor drive and a current sampling module to realize temperature acquisition of the MOS tube in the motor drive and current sampling modules, thereby realizing over-temperature protection of the polishing machine.

[0035] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0036] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0037] The above description shows and describes several preferred embodiments of the present invention, but as before, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept of this article through the above teachings or the technology or knowledge of the relevant field. And the changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. An electrical control system for a polishing machine, characterized in that: The invention comprises a single chip microcomputer, wherein the single chip microcomputer is connected with a power supply circuit, a temperature acquisition circuit, a motor drive and current sampling circuit, a rotor position detection circuit and an anti-runaway circuit, wherein the power supply circuit supplies power to the temperature acquisition circuit, the motor drive and current sampling circuit, the rotor position detection circuit, the anti-runaway circuit and the single chip microcomputer, the temperature acquisition circuit is used to acquire the temperature of the MOS tube in the motor drive and current sampling circuit, the motor drive, the rotor position detection circuit is used to detect the rotor position of the motor, the anti-runaway circuit is used to protect the polishing machine, the anti-runaway circuit is connected to the 4 pins of the single chip microcomputer, and is connected to the motor drive and current sampling circuit, and is used to control The motor stops, and the anti-flying circuit includes a first connection point and a second connection point. The first connection point is connected to pin 4 of the single-chip microcomputer, and the second connection point is connected to the motor drive and current sampling circuit. Resistor R44, MOS tube Q3 and resistor R42 are arranged between the first connection point and the second connection point in sequence. The resistor R44 is connected to the drain of the MOS tube Q3, the source of the MOS tube Q3 is grounded, and the resistor R42 is connected to the gate of the MOS tube Q3. The anti-flying circuit also includes a resistor R43 and a capacitor C19. The resistor R43 and the capacitor C19 are connected in parallel and connected between the MOS tube and the resistor R42.

2. The electrical control system of a polishing machine according to claim 1, characterized in that: The motor drive and current sampling circuit includes a U-phase part, a V-phase part and a W-phase part. The U-phase part, the V-phase part and the W-phase part all include access points H, O, L and an access point B+. The access points H, O and L are connected to the connection pins on the single-chip microcomputer respectively. The access point B+ is connected to the second connection point in the anti-flying circuit. A first resistor and a first MOS tube are arranged between the access point H and the access point B+. A second resistor is arranged between the access point O and the first MOS tube. A second MOS tube and a third resistor are arranged between the access point L and the first MOS tube. A fourth resistor is arranged between the first resistor and the second resistor. The third resistor is connected to a fifth resistor. The fifth resistors of the U-phase part, the V-phase part and the W-phase part are connected to each other and connected to resistor R25.

3. An electrical control system for a polishing machine according to claim 2, characterized in that: The resistor R25 is connected to resistor R39, resistor R40, and resistor R41. The resistor R41 is connected to pin 13 of the single-chip microcomputer. A connection point OP1-0 is provided between the resistor R41 and the resistor R40 for connecting to pin 14 of the single-chip microcomputer. A connection point OP1-N is provided between the resistor R40 and the resistor R39 for connecting to pin 15 of the single-chip microcomputer. The fifth resistor of the W-phase part is also connected to R38. The resistor R38 is connected to OP1-P and to pin 16 of the single-chip microcomputer.

4. The electrical control system of a polishing machine according to claim 2, characterized in that: The rotor position detection circuit is provided with 3 paths, which are respectively connected to the U phase part, the V phase part and the W phase part, and each path is respectively connected to the 1st pin, the 2nd pin and the 3rd pin of the single chip computer. The rotor position detection circuit includes resistor 1, resistor 2 and capacitor 1, wherein resistor 1 is connected to resistor 2 and then grounded, resistor 2 is connected in parallel with capacitor 1, and capacitor 1 is connected to point Bef.

5. An electrical control system for a polishing machine according to claim 2, wherein the portion between the first MOS transistor and the second MOS transistor is connected to a corresponding rotor position detection circuit.

6. The electrical control system of a polishing machine according to claim 1, characterized in that: The temperature acquisition circuit is connected to pin 17 of the single-chip microcomputer and is connected to the power supply circuit. The temperature acquisition circuit includes an input end connected to the power supply circuit and a connection end connected to the single-chip microcomputer. The input end is connected to a resistor R16 and a thermistor RNTC1, and the thermistor is grounded. The resistor R16 is connected to the connection end and is connected to a capacitor C10, and the capacitor C10 is grounded.

7. The electrical control system of a polishing machine according to claim 1, characterized in that: The system also includes a speed adjustment circuit for controlling the speed of the polishing machine, and the speed adjustment circuit includes a pressure input point, a switch S2, a switch S3 and a switch S1, wherein the switch S1 is a switch for controlling the opening and closing of the polishing machine, the switch S2 is connected to a resistor R20, and the switch S3 is connected to a resistor R21.

8. An electrical control system for a polishing machine according to claim 6, characterized in that: The speed adjustment circuit is connected to an intermediate circuit for receiving an adjustment signal, and the intermediate circuit is connected to pin 6 of the single-chip microcomputer.

9. The electrical control system of a polishing machine according to claim 1, characterized in that: The system also includes a download port module.

10. The electrical control system of a polishing machine according to claim 1, characterized in that: The output voltage of the power supply part is 5V.

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