A vibration compensation motor vibrating cutter head

Abstract

This utility model discloses a vibration-compensated motor vibrating cutter head, belonging to the technical field of vibrating cutter heads. It solves the problem of excessively high vibration frequency during soft material cutting or excessively low vibration frequency during hard material cutting caused by crystal oscillator frequency drift leading to timer counting errors or interference rewriting of the PWM duty cycle register. If the vibration frequency is too high when cutting soft materials, the material melts and sticks; if the vibration frequency is too low when cutting hard materials, the blade will chip. The vibrating cutter head includes a vibrating cutter head body and a drive motor connected to it. The drive motor is electrically connected to an anti-interference frequency stabilization circuit. This anti-interference frequency stabilization circuit establishes a frequency reference and monitors the output frequency in real time, controlling the drive motor to shut down when a threshold is exceeded. This utility model establishes a frequency reference and monitors the output frequency in real time through its anti-interference frequency stabilization circuit, controlling the drive motor to shut down when a threshold is exceeded.

Description

Technical Field

[0001] This utility model relates to the field of vibratory cutter head technology, and in particular to a vibration compensation motor vibratory cutter head. Background Technology

[0002] A servo motor vibratory cutter head is a high-precision cutting component driven by a servo motor. The high-speed reciprocating motion of the motor drives the cutter head to vibrate at high frequency, achieving cutting. Relying on a servo system to precisely control the vibration frequency, amplitude, and cutting speed, it is suitable for various materials such as fabrics, leather, and foam. It features high cutting accuracy, smooth edges, and rapid response, and is widely used in industries such as clothing and furniture. It can work with automated equipment to complete complex shape cutting, significantly improving processing efficiency and quality.

[0003] In practical applications, the vibration head of the motor may experience problems such as timer counting errors due to crystal oscillator frequency drift, or the PWM duty cycle register being overwritten due to interference. This can result in excessively high vibration frequency when cutting soft materials or excessively low vibration frequency when cutting hard materials. If the vibration frequency is too high when cutting soft materials, the material will melt and stick together. However, if the vibration frequency is too low when cutting hard materials, the blade may chip.

[0004] Therefore, a vibration compensation motor vibration cutter head is proposed to solve or alleviate the above problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a vibration compensation motor vibration cutter head.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A vibration compensation motor vibratory cutter head includes a vibratory cutter head body and a drive motor connected thereto. The drive motor is electrically connected to an anti-interference frequency stabilization circuit. The anti-interference frequency stabilization circuit establishes a frequency reference and monitors the output frequency in real time. When the frequency exceeds a threshold, it controls the drive motor to shut down.

[0008] Preferably, the anti-interference frequency stabilization circuit includes a temperature-compensated crystal oscillator module, a frequency divider module, a PWM control module, a frequency window comparison module, a register latch protection module, and a power drive module. The signal output terminal of the temperature-compensated crystal oscillator module is electrically connected to the clock signal input terminal of the frequency divider module. The frequency divider signal output terminal of the frequency divider module is electrically connected to the oscillator timing capacitor terminal of the PWM control module and the vibration frequency signal input terminal of the frequency window comparison module. The PWM signal output terminal of the PWM control module is electrically connected to the data signal input terminal of the register latch protection module. The latched data output terminal of the register latch protection module is electrically connected to the logic signal input terminal of the power drive module through an optocoupler isolator. The emergency shutdown output terminal of the frequency window comparison module is electrically connected to the shutdown control terminal of the PWM control module. The drive output terminal of the power drive module is electrically connected to the drive motor.

[0009] Preferably, the temperature-compensated crystal oscillator module includes an ECS-TXO-3225 temperature-compensated crystal oscillator, an AMS1117 low-dropout regulator, a first resistor, and a second resistor. The voltage input terminal of the AMS1117 low-dropout regulator is connected to a DC power supply, and the regulated ground terminal of the AMS1117 low-dropout regulator is grounded. The output voltage terminal of the AMS1117 low-dropout regulator is connected to the power supply terminal of the ECS-TXO-3225 temperature-compensated crystal oscillator. The output voltage terminal of the AMS1117 low-dropout regulator is grounded through the first resistor. The ground terminal of the ECS-TXO-3225 temperature-compensated crystal oscillator is grounded. The signal output terminal of the ECS-TXO-3225 temperature-compensated crystal oscillator is connected to the clock signal input terminal of the frequency divider module through the second resistor.

[0010] Preferably, the frequency division module includes a CD4060 frequency divider. The clock signal input terminal of the CD4060 frequency divider is connected to the temperature-compensated crystal oscillator signal output terminal of the temperature-compensated crystal oscillator module. The frequency division signal output terminal of the CD4060 frequency divider is connected to the oscillator timing capacitor terminal of the PWM control module and the vibration frequency signal input terminal of the frequency window comparison module. The power supply terminal of the CD4060 frequency divider is connected to the power supply through a ferrite bead, and the ground terminal of the CD4060 frequency divider is grounded.

[0011] Preferably, the PWM control module includes a PWM controller SG3525. The oscillator timing capacitor terminal of the PWM controller SG3525 is connected to the frequency division signal output terminal of the frequency divider module. The PWM signal output terminal of the PWM controller SG3525 is connected to the data signal input terminal of the register latch protection module. The shutdown control terminal of the PWM controller SG3525 is connected to the emergency shutdown output terminal of the frequency window comparison module through the cathode of the shutdown diode. The oscillation frequency setting resistor terminal of the PWM control module is grounded through a third resistor. The oscillation frequency setting capacitor terminal of the PWM control module is grounded through a first ceramic capacitor.

[0012] Preferably, the frequency window comparison module includes an SN74HC573 data latch and a TPS3700 voltage monitoring chip. The data signal input terminal of the SN74HC573 data latch is connected to the PWM signal output terminal of the PWM control module. The latch enable terminal of the SN74HC573 data latch is connected to the status output terminal of the TPS3700 voltage monitoring chip. The latch data output terminal of the SN74HC573 data latch is connected to the anode terminal of the input side of the optocoupler isolator. The power detection terminal of the TPS3700 voltage monitoring chip is powered on. The status output terminal of the TPS3700 voltage monitoring chip is connected to the latch enable terminal of the SN74HC573 data latch. The monitoring ground terminal of the TPS3700 voltage monitoring chip is grounded.

[0013] Preferably, the register latch protection module includes an LM339 voltage comparator, a first TL431 reference source, and a second TL431 reference source. The input terminal of the LM339 voltage comparator is connected to the timing capacitor terminal of the oscillator of the PWM control module. The upper limit reference voltage terminal of the LM339 voltage comparator is connected to the output terminal of the first TL431 reference source through a fourth resistor. The lower limit reference voltage terminal of the LM339 voltage comparator is connected to the output terminal of the second TL431 reference source through a fifth resistor. The output terminal of the LM339 voltage comparator is connected to the anode of the turn-off diode in the PWM control module.

[0014] Preferably, the power drive module includes an IR2110 driver, a power MOSFET, and a bootstrap capacitor. The logic signal input terminal of the IR2110 driver is connected to the output collector of the optocoupler isolator. The high-side gate drive output terminal of the IR2110 driver is connected to the gate of the power MOSFET through a sixth resistor. The high-side floating power supply terminal of the IR2110 driver is connected to the positive terminal of the bootstrap capacitor through a bootstrap diode. The negative terminal of the bootstrap capacitor is connected to the high-side floating ground terminal of the IR2110 driver. The drain of the power MOSFET is connected to the positive power supply of the drive motor. The source of the power MOSFET is grounded through a seventh resistor.

[0015] This utility model has the following beneficial effects:

[0016] This invention establishes a frequency reference through its anti-interference frequency stabilization circuit and monitors the output frequency in real time. When the frequency exceeds the threshold, the drive motor is shut down. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a block diagram of the anti-interference frequency stabilization circuit in this utility model.

[0020] In the figure: 1. Vibrating cutter head body; 2. Drive motor; 3. Temperature compensation crystal oscillator module; 4. Frequency division module; 5. PWM control module; 6. Frequency window comparison module; 7. Register latch protection module; 8. Power drive module. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] A vibration-compensating motor vibrating cutter head, such as Figure 1 As shown, the device includes a vibrating cutter head body 1 and a drive motor 2 connected to it. The drive motor 2 is electrically connected to an anti-interference frequency stabilization circuit. The anti-interference frequency stabilization circuit establishes a frequency reference and monitors the output frequency in real time. When the frequency exceeds a threshold, it controls the drive motor 2 to shut down. Figure 2 As shown, the anti-interference frequency stabilization circuit includes a temperature-compensated crystal oscillator module 3, a frequency divider module 4, a PWM control module 5, a frequency window comparison module 6, a register latch protection module 7, and a power drive module 8. The signal output terminal of the temperature-compensated crystal oscillator module 3 is electrically connected to the clock signal input terminal of the frequency divider module 4. The frequency divider signal output terminal of the frequency divider module 4 is electrically connected to the oscillator timing capacitor terminal of the PWM control module 5 and the vibration frequency signal input terminal of the frequency window comparison module 6. The PWM signal output terminal of the PWM control module 5 is electrically connected to the data signal input terminal of the register latch protection module 7. The latched data output terminal of the register latch protection module 7 is electrically connected to the logic signal input terminal of the power drive module 8 through an optocoupler isolator. The emergency shutdown output terminal of the frequency window comparison module 6 is electrically connected to the shutdown control terminal of the PWM control module 5. The drive output terminal of the power drive module 8 is electrically connected to the drive motor 2.

[0028] The temperature-compensated crystal oscillator module 3 includes an ECS-TXO-3225 temperature-compensated crystal oscillator, an AMS1117 low-dropout regulator, a first resistor, and a second resistor. The voltage input terminal of the AMS1117 low-dropout regulator is connected to a DC power supply, and the regulated ground terminal of the AMS1117 low-dropout regulator is grounded. The output voltage terminal of the AMS1117 low-dropout regulator is connected to the power supply terminal of the ECS-TXO-3225 temperature-compensated crystal oscillator. The output voltage terminal of the AMS1117 low-dropout regulator is grounded through the first resistor. The ground terminal of the ECS-TXO-3225 temperature-compensated crystal oscillator is grounded. The signal output terminal of the ECS-TXO-3225 temperature-compensated crystal oscillator is connected to the clock signal input terminal of the frequency divider module 4 through the second resistor.

[0029] Frequency divider module 4 includes a CD4060 frequency divider. The clock signal input terminal of the CD4060 frequency divider is connected to the temperature-compensated crystal oscillator signal output terminal of the temperature-compensated crystal oscillator module 3. The frequency division signal output terminal of the CD4060 frequency divider is connected to the oscillator timing capacitor terminal of the PWM control module 5 and the vibration frequency signal input terminal of the frequency window comparison module 6. The power supply terminal of the CD4060 frequency divider is connected to the power supply through a ferrite bead, and the ground terminal of the CD4060 frequency divider is grounded.

[0030] The PWM control module 5 includes a PWM controller SG3525. The oscillator timing capacitor of the PWM controller SG3525 is connected to the frequency division signal output of the frequency divider module 4. The PWM signal output of the PWM controller SG3525 is connected to the data signal input of the register latch protection module 7. The shutdown control terminal of the PWM controller SG3525 is connected to the emergency shutdown output of the frequency window comparison module 6 through the cathode of the shutdown diode. The oscillation frequency setting resistor of the PWM control module 5 is grounded through a third resistor. The oscillation frequency setting capacitor of the PWM control module 5 is grounded through a first ceramic capacitor.

[0031] The frequency window comparison module 6 includes an SN74HC573 data latch and a TPS3700 voltage monitoring chip. The data signal input terminal of the SN74HC573 data latch is connected to the PWM signal output terminal of the PWM control module 5. The latch enable terminal of the SN74HC573 data latch is connected to the status output terminal of the TPS3700 voltage monitoring chip. The latch data output terminal of the SN74HC573 data latch is connected to the anode terminal of the input side of the optocoupler isolator. The power detection terminal of the TPS3700 voltage monitoring chip is powered on. The status output terminal of the TPS3700 voltage monitoring chip is connected to the latch enable terminal of the SN74HC573 data latch. The monitoring ground terminal of the TPS3700 voltage monitoring chip is grounded.

[0032] The register latch protection module 7 includes an LM339 voltage comparator, a first TL431 reference source, and a second TL431 reference source. The input terminal of the LM339 voltage comparator is connected to the timing capacitor terminal of the oscillator of the PWM control module 5. The upper limit reference voltage terminal of the LM339 voltage comparator is connected to the output terminal of the first TL431 reference source through a fourth resistor. The lower limit reference voltage terminal of the LM339 voltage comparator is connected to the output terminal of the second TL431 reference source through a fifth resistor. The output terminal of the LM339 voltage comparator is connected to the anode of the turn-off diode in the PWM control module 5.

[0033] The power drive module 8 includes an IR2110 driver, a power MOSFET, and a bootstrap capacitor. The logic signal input terminal of the IR2110 driver is connected to the output collector of the optocoupler isolator. The high-side gate drive output terminal of the IR2110 driver is connected to the gate of the power MOSFET through a sixth resistor. The high-side floating power supply terminal of the IR2110 driver is connected to the positive terminal of the bootstrap capacitor through a bootstrap diode. The negative terminal of the bootstrap capacitor is connected to the high-side floating ground terminal of the IR2110 driver. The drain of the power MOSFET is connected to the positive power supply of the drive motor 2, and the source of the power MOSFET is grounded through a seventh resistor.

[0034] During the operation of this motor vibrating cutter head, in order to eliminate the risk of frequency runaway caused by crystal drift and register interference, an anti-interference frequency stabilization circuit works in conjunction. The temperature compensation crystal module 3 generates a precise clock. The temperature compensation crystal oscillator, within an ambient temperature range of -40℃ to 85℃, relies on an internal thermistor network to correct the quartz crystal resonance characteristics in real time, thereby controlling the output frequency deviation.

[0035] The high-stability clock signal is transmitted to the clock input of the frequency divider module 4 via the second resistor. The CD4060 frequency divider divides the signal 214 times, converting the 33MHz base frequency into a 2kHz reference signal. The frequency divider output is then directly connected to the oscillator timing capacitor of the PWM controller SG3525. This process completely avoids the timer timing reference distortion caused by the nonlinear temperature drift of ordinary crystal oscillators.

[0036] At the same time, the frequency division signal is synchronously input to the vibration frequency signal input terminal of the LM339 voltage comparator, and is compared with the upper limit threshold of 2.5V and the lower limit threshold of 1.8V generated by the first TL431 reference source and the second TL431 reference source in real time for analog quantity comparison.

[0037] When environmental electromagnetic interference, such as inverter switching noise, enters the PWM controller SG3525 through parasitic capacitance coupling, the risk of it potentially tampering with the internal duty cycle register of the PWM controller SG3525 is immediately blocked by the register latch protection module 7.

[0038] The TPS3700 voltage monitoring chip continuously monitors the +5V logic power supply. If the voltage fluctuation exceeds the ±5% tolerance, its status output immediately sends a low-level freeze command to the latch enable pin of the SN74HC573 data latch. The SN74HC573 data latch maintains the current PWM output state to prevent interference pulses from rewriting the drive signal.

[0039] The optocoupler, through photoelectric conversion between the input and output sides, establishes a 5kV electrical isolation barrier between the latched data output terminal of the SN74HC573 data latch and the logic input terminal of the IR2110 driver, thus blocking the power stage switching noise from back-polluting the control circuit.

[0040] When the circuit encounters extreme operating conditions, the frequency window comparison module 6 executes the shutdown action of the drive motor 2. If the voltage at the timing capacitor terminal of the oscillator of the PWM controller SG3525 rises abnormally due to crystal frequency deviation or register tampering during soft material cutting, the LM339 voltage comparator detects that the input voltage exceeds the 2.5V threshold, and its emergency shutdown output terminal is immediately pulled down to a low level. The current flows through the shutdown diode into the shutdown control terminal of the PWM controller SG3525, stopping the PWM output and preventing the material surface temperature from rising sharply due to high-frequency friction of the blade, causing it to melt and stick together.

[0041] Conversely, in the cutting of hard materials, if the vibration frequency is <20Hz, the LM339 voltage comparator will also trigger the shutdown action to eliminate the stress concentration effect caused by the excessively long single-cycle load time and prevent the chipping accident caused by the propagation of micro-cracks on the cutting edge.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vibration-compensating motor vibratory cutter head, characterized in that, It includes a vibrating cutter head body (1) and a drive motor (2) connected to it. The drive motor (2) is electrically connected to an anti-interference frequency stabilization circuit. The anti-interference frequency stabilization circuit establishes a frequency reference and monitors the output frequency in real time. When it detects that the frequency exceeds the threshold, it controls the drive motor (2) to turn off.

2. The vibration compensation motor vibratory cutter head according to claim 1, characterized in that, The anti-interference frequency stabilization circuit includes a temperature-compensated crystal oscillator module (3), a frequency divider module (4), a PWM control module (5), a frequency window comparison module (6), a register latch protection module (7), and a power drive module (8). The signal output terminal of the temperature-compensated crystal oscillator module (3) is electrically connected to the clock signal input terminal of the frequency divider module (4). The frequency divider signal output terminal of the frequency divider module (4) is electrically connected to the oscillator timing capacitor terminal of the PWM control module (5) and the vibration frequency signal input terminal of the frequency window comparison module (6). The PWM signal output terminal of the PWM control module (5) is electrically connected to the data signal input terminal of the register latch protection module (7). The latch data output terminal of the register latch protection module (7) is electrically connected to the logic signal input terminal of the power drive module (8) through an optocoupler isolator. The emergency shutdown output terminal of the frequency window comparison module (6) is electrically connected to the shutdown control terminal of the PWM control module (5). The drive output terminal of the power drive module (8) is electrically connected to the drive motor (2).

3. The vibration compensation motor vibratory cutter head according to claim 2, characterized in that, The temperature-compensated crystal oscillator module (3) includes an ECS-TXO-3225 temperature-compensated crystal oscillator, an AMS1117 low-dropout regulator, a first resistor, and a second resistor. The voltage input terminal of the AMS1117 low-dropout regulator is connected to a DC power supply. The voltage grounding terminal of the AMS1117 low-dropout regulator is grounded. The output voltage terminal of the AMS1117 low-dropout regulator is connected to the power supply terminal of the ECS-TXO-3225 temperature-compensated crystal oscillator. The output voltage terminal of the AMS1117 low-dropout regulator is grounded through the first resistor. The grounding terminal of the ECS-TXO-3225 temperature-compensated crystal oscillator is grounded. The signal output terminal of the ECS-TXO-3225 temperature-compensated crystal oscillator is connected to the clock signal input terminal of the frequency divider module (4) through the second resistor.

4. A vibration compensation motor vibratory cutter head according to claim 2, characterized in that, The frequency division module (4) includes a CD4060 frequency divider. The clock signal input terminal of the CD4060 frequency divider is connected to the temperature-compensated crystal oscillator signal output terminal of the temperature-compensated crystal oscillator module (3). The frequency division signal output terminal of the CD4060 frequency divider is connected to the oscillator timing capacitor terminal of the PWM control module (5) and the vibration frequency signal input terminal of the frequency window comparison module (6). The power supply terminal of the CD4060 frequency divider is connected to the power supply through a ferrite bead. The ground terminal of the CD4060 frequency divider is grounded.

5. A vibration compensation motor vibratory cutter head according to claim 2, characterized in that, The PWM control module (5) includes a PWM controller SG3525. The oscillator timing capacitor of the PWM controller SG3525 is connected to the frequency division signal output terminal of the frequency division module (4). The PWM signal output terminal of the PWM controller SG3525 is connected to the data signal input terminal of the register latch protection module (7). The shutdown control terminal of the PWM controller SG3525 is connected to the emergency shutdown output terminal of the frequency window comparison module (6) through the cathode of the shutdown diode. The oscillation frequency setting resistor terminal of the PWM control module (5) is grounded through a third resistor. The oscillation frequency setting capacitor terminal of the PWM control module (5) is grounded through a first ceramic capacitor.

6. A vibration compensation motor vibratory cutter head according to claim 2, characterized in that, The frequency window comparison module (6) includes an SN74HC573 data latch and a TPS3700 voltage monitoring chip. The data signal input terminal of the SN74HC573 data latch is connected to the PWM signal output terminal of the PWM control module (5). The latch enable terminal of the SN74HC573 data latch is connected to the status output terminal of the TPS3700 voltage monitoring chip. The latch data output terminal of the SN74HC573 data latch is connected to the anode terminal of the input side of the optocoupler isolator. The power detection terminal of the TPS3700 voltage monitoring chip is powered on. The status output terminal of the TPS3700 voltage monitoring chip is connected to the latch enable terminal of the SN74HC573 data latch. The monitoring ground terminal of the TPS3700 voltage monitoring chip is grounded.

7. A vibration compensation motor vibratory cutter head according to claim 2, characterized in that, The register latch protection module (7) includes an LM339 voltage comparator, a first TL431 reference source, and a second TL431 reference source. The input terminal of the LM339 voltage comparator is connected to the oscillator timing capacitor terminal of the PWM control module (5). The upper limit reference voltage terminal of the LM339 voltage comparator is connected to the output terminal of the first TL431 reference source through a fourth resistor. The lower limit reference voltage terminal of the LM339 voltage comparator is connected to the output terminal of the second TL431 reference source through a fifth resistor. The output terminal of the LM339 voltage comparator is connected to the anode of the turn-off diode in the PWM control module (5).

8. A vibration compensation motor vibratory cutter head according to claim 2, characterized in that, The power drive module (8) includes an IR2110 driver, a power MOSFET, and a bootstrap capacitor. The logic signal input terminal of the IR2110 driver is connected to the output collector of the optocoupler isolator. The high-side gate drive output terminal of the IR2110 driver is connected to the gate of the power MOSFET through a sixth resistor. The high-side floating power supply terminal of the IR2110 driver is connected to the positive terminal of the bootstrap capacitor through a bootstrap diode. The negative terminal of the bootstrap capacitor is connected to the high-side floating ground terminal of the IR2110 driver. The drain of the power MOSFET is connected to the positive power supply terminal of the drive motor (2). The source of the power MOSFET is grounded through a seventh resistor.

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