Angle grinder driving circuit with intelligent variable power

Abstract

The utility model relates to the technical field of electric tools, and belongs to an intelligent variable-power angle grinder drive circuit which comprises a power input module and an output module. A current detection module for detecting the real-time load current of the angle grinder, a control module MCU for calculating the current power value and a power adjusting module for adjusting the output power are sequentially connected between the power input module and the output module, and the output module is connected with a motor of the angle grinder. According to the utility model, through the combination of current induction and the control module, the output power can be automatically adjusted according to the real-time load change. By means of the design, the angle grinder can operate efficiently under different loads, the problem that energy consumption is too high or overload damage is caused is solved, and more intelligent and convenient operation experience is provided for a user.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric tools, and belongs to a kind of intelligent variable power angle grinder drive circuit. BACKGROUND

[0002] The main power source of an angle grinder is a motor, which is driven by a circuit to achieve high-speed rotation. However, most of the angle grinder drive circuits on the market currently have a relatively simple design, commonly using fixed power output, which leads to many problems under different load conditions.

[0003] 1. Drawbacks of fixed power output:

[0004] In traditional angle grinder designs, the output power of the motor is generally fixed, regardless of the working state of the angle grinder. The motor will run at the same power. This design has the following major drawbacks:

[0005] Excessive energy consumption: In light or no-load conditions, the motor still works at a fixed high power, resulting in unnecessary waste of electrical energy and reducing the energy efficiency of the device.

[0006] Load mismatching problem: When the angle grinder encounters large resistance or performs heavy-load work (such as cutting thick metal materials), the fixed power output may not meet the actual demand, leading to low work efficiency or easy motor overload damage.

[0007] Shortened motor life: Frequent overload operation can raise the temperature of the motor, accelerating the aging of internal components and shortening the service life of the angle grinder.

[0008] 2. Limitations of existing improved technologies:

[0009] Some high-end angle grinders have begun to incorporate simple speed adjustment functions, allowing users to adjust the speed manually to adapt to different operating environments. However, this manual adjustment based on human experience still has limitations:

[0010] Inconvenient manual operation: Users need to manually adjust the speed according to the work load, which requires the operator to have certain experience and judgment, increasing the complexity of operation.

[0011] Unable to adjust in real time: In actual operation, the work load is dynamically changing, and manual adjustment is difficult to achieve real-time and precise power control, often unable to respond to sudden load changes, still likely to cause motor overload or energy waste.

[0012] 3. Demand for intelligent power control:

[0013] With the development of technology, intelligent and automatic control system is gradually introduced into the field of electric tools. For angle grinder, designing a drive circuit capable of adjusting output power according to load condition can effectively solve the problems in the prior art. The intelligent power regulation system can not only improve work efficiency, but also greatly reduce energy consumption and prolong the service life of the equipment. Content of the utility model

[0014] In view of the above technical problems, the utility model provides a kind of angle grinder drive circuit with intelligent variable power, by the combination of current induction and control module, can automatically adjust output power according to real-time load change.

[0015] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0016] The application provides an angle grinder drive circuit with intelligent variable power, comprising a power input module and an output module, the power input module is connected with an external power supply end VCC, the power input module and the output module are sequentially connected with a current detection module for detecting the real-time load current of the angle grinder, a control module MCU for calculating current power value and a power regulation module for regulating output power, and the output module is connected with the motor of the angle grinder.

[0017] As a preferred, the power input module includes NMOS tube Q1, NMOS tube Q2, NMOS tube Q3 and NMOS tube Q4, the NMOS tube Q1, NMOS tube Q2, NMOS tube Q3 and NMOS tube Q4 are connected in series to form a full-bridge drive circuit, the drain of the NMOS tube Q1 and the drain of the NMOS tube Q2 are connected to the external power supply end VCC, and the source of the NMOS tube Q3 and the source of the NMOS tube Q4 are connected with the current detection module.

[0018] As a preferred, the power regulation module includes a driver, the driver is provided with a joint 1, a joint 2 and a joint 3, the joint 1 is connected with the gate of the NMOS tube Q2, the joint 2 is connected with the gate of the NMOS tube Q4, and the joint 3 is connected with the control module MCU.

[0019] As a preferred, the current detection module includes a resistor R and a diode, the resistor R and the diode are connected in parallel, the power input module is connected with one end of the resistor R, the other end of the resistor R is connected to the ground end, the positive electrode of the diode is connected with the power input module, and the negative electrode of the diode is connected with the control module MCU.

[0020] Compared with the prior art, the utility model provides an angle grinder drive circuit with intelligent variable power, which has the following beneficial effects:

[0021] The utility model discloses a current induction and control module combination can automatically adjust output power according to real-time load change, this design makes angle grinder can keep high -efficient operation under different load, avoids the problem of over -high energy consumption or overload damage, provides more intelligent and convenient operation experience for the user.

[0022] The features and advantages of the present utility will be described in detail in conjunction with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the circuit diagram of the utility model;

[0024] Figure 2 It is the circuit schematic diagram of the utility model; DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantage of the present utility more clear and obvious, below, through the drawings and embodiment, the present utility is further described in detail.But it should be understood that the specific embodiment described here is only used to explain the present utility, and is not used to limit the scope of the present utility.In addition, in the following description, the description of well-known structure and technology is omitted to avoid unnecessary confusion of the concept of the present utility.

[0026] Referring to Figure 1 The application provides a kind of intelligent variable power angle grinder drive circuit, including power input module and output module, the power input module is connected with external power terminal VCC, current detection module for detecting the real-time load current of angle grinder, control module MCU and power regulation module for adjusting output power are sequentially connected between the power input module and output module, the output module is connected with angle grinder motor.The control module is realized by microcontroller MCU, can dynamically adjust power output according to real-time load change, avoid overload while saving energy.

[0027] Referring to Figure 2 Specifically, the power input module includes NMOS tube Q1, NMOS tube Q2, NMOS tube Q3 and NMOS tube Q4, the NMOS tube Q1, NMOS tube Q2, NMOS tube Q3 and NMOS tube Q4 are connected in series to form full-bridge drive circuit, the drain of NMOS tube Q1 and the drain of NMOS tube Q2 are connected to external power terminal VCC, the source of NMOS tube Q3 and the source of NMOS tube Q4 are connected with current detection module.

[0028] Further, the power adjustment module includes a driver, the driver is provided with a joint 1, a joint 2 and a joint 3, the joint 1 is connected with the gate of the NMOS tube Q2, the joint 2 is connected with the gate of the NMOS tube Q4, and the joint 3 is connected with the control module MCU.

[0029] Referring to Figure 2 Specifically, the current detection module includes a resistor R and a diode, the resistor R and the diode are connected in parallel, one end of the power input module is connected with the resistor R, the other end of the resistor R is connected to the ground end, the positive electrode of the diode is connected with the power input module, and the negative electrode of the diode is connected with the control module MCU.

[0030] The working principle of the utility model is as follows:

[0031] 1. When the power module receives external power, the current sensing module starts to monitor the load current of the angle grinder motor;

[0032] 2. After the control module receives the signal of the current sensing module, the load condition is analyzed, the required output power is calculated, and the adjustment instruction is sent to the power adjustment module;

[0033] 3. The power adjustment module adjusts the output power of the motor according to the instruction to adapt to the current load demand;

[0034] 4. When the load is large, the control module automatically increases the output power, and vice versa, when the load decreases, the power output is automatically reduced, so as to ensure that the power matches the load.

[0035] In an embodiment, the angle grinder driving circuit of the application can effectively adjust the power output according to the cutting requirements of different materials. For example, when the user cuts hard materials, the current sensing module detects a higher load current, and the control module automatically increases the power output to ensure the cutting efficiency. When the grinding operation is lighter, the power is automatically reduced to save energy.

[0036] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement or improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A smart variable power angle grinder drive circuit, characterized by: The power input module is connected with an external power terminal VCC, and the power input module and the output module are sequentially connected with a current detection module for detecting real-time load current of the angle grinder, a control module MCU for calculating current power value, and a power adjusting module for adjusting output power, and the output module is connected with the motor of the angle grinder.

2. A smart variable power angle grinder drive circuit as claimed in claim 1 characterized in that: The power input module comprises NMOS tubes Q1, Q2, Q3 and Q4, the NMOS tubes Q1, Q2, Q3 and Q4 are connected in series to form a full-bridge driving circuit, the drain of the NMOS tube Q1 and the drain of the NMOS tube Q2 are both connected to the external power terminal VCC, and the source of the NMOS tube Q3 and the source of the NMOS tube Q4 are both connected with the current detection module.

3. A smart variable power angle grinder drive circuit as claimed in claim 2, characterized in that: The power adjusting module comprises a driver, the driver is provided with a joint 1, a joint 2 and a joint 3, the joint 1 is connected with the gate of the NMOS tube Q2, the joint 2 is connected with the gate of the NMOS tube Q4, and the joint 3 is connected with the control module MCU.

4. A smart variable power angle grinder drive circuit as defined in claim 1, wherein: The current detection module comprises a resistor R and a diode, the resistor R and the diode are connected in parallel, the power input module is connected with one end of the resistor R, the other end of the resistor R is connected to a ground terminal, the positive electrode of the diode is connected with the power input module, and the negative electrode of the diode is connected with the control module MCU.

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