Motor driver having automatic startup torque modulation mechanism

Abstract

This invention provides a motor driver with an automatic torque modulation mechanism for starting. The motor driver detects motor status data. The motor status data includes the motor's rotation direction. The motor status data may also include the motor's rotational speed. Based on the detected motor status data, the motor driver sets multiple starting parameters. Based on these multiple starting parameters, the motor driver constructs or modulates multiple waveforms of a starting waveform signal. The motor driver starts the motor based on the starting waveform signal.

Description

Technical Field

[0001] This invention relates to motor drives, and more particularly to a motor drive with an automatic torque modulation mechanism for starting. Prior Technology

[0002] Electronic products generate heat during operation, especially in enclosed spaces or enclosures. The heat produced by these components circulates within the enclosure, heating other components and potentially causing them to overheat and break down. Therefore, electronic products must be equipped with fans to cool the circuit components.

[0003] However, when a fan installed in an electronic device is removed due to damage or replacement, the airflow reverses direction towards the original fan's location. This causes the new fan to reverse direction when it is reinstalled, and typically at a very high speed. Traditional motor drives fail to effectively start the new fan in the correct direction when there is a headwind or when the new fan is reversing. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a motor driver with an automatic torque modulation mechanism for starting. The motor driver with an automatic torque modulation mechanism for starting includes a motor state detection circuit, a start-up reference setting circuit, and a motor starting circuit. The motor state detection circuit is configured to detect motor state data and output a motor state detection signal. The motor state data includes the motor's rotational speed, rotation direction, or a combination thereof. The start-up reference setting circuit is connected to the motor state detection circuit. The start-up reference setting circuit is configured to set multiple starting parameters based on the motor state detection signal. The motor starting circuit is connected to the start-up reference setting circuit and the motor. The motor starting circuit is configured to construct or modulate multiple waveforms of a start-up waveform signal based on the multiple start-up parameters, and start the motor based on the start-up waveform signal.

[0005] As described above, the present invention provides a motor driver with an automatic torque modulation mechanism for starting. The motor driver of the present invention can set multiple starting parameters based on the motor's speed, direction of rotation, or a combination thereof, and construct or modulate a starting waveform signal for starting the motor based on these set starting parameters. In particular, when the motor reverses direction, the motor driver of the present invention can construct or modulate a starting waveform signal currently suitable for starting the motor in a forward direction, thereby applying a larger starting torque to the motor and improving the success rate of motor starting in strong winds and reverse rotation conditions.

[0006] To further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are for reference and illustration only and are not intended to limit the present invention. Simple Explanation of the Diagram

[0007] Figure 1 is a block diagram of a motor driver with an automatic torque adjustment mechanism for starting according to a first embodiment of the present invention.

[0008] Figure 2 is a block diagram of a motor driver with an automatic torque adjustment mechanism for starting according to a second embodiment of the present invention.

[0009] Figure 3 is a block diagram of the start reference setting circuit included in the motor driver with an automatic start torque adjustment mechanism according to the third embodiment of the present invention.

[0010] Figure 4A is a schematic diagram of the duty cycle of the motor driver with automatic torque adjustment mechanism according to the change of motor reverse rotation speed in the third embodiment of the present invention.

[0011] Figure 4B is a schematic diagram of the duty cycle change of the start-up waveform signal of the motor driver with an automatic start-up torque modulation mechanism according to the third embodiment of the present invention.

[0012] Figure 5 is a schematic diagram of the acceleration time adjusted by the motor driver with automatic torque adjustment mechanism according to the change of motor reverse rotation speed in the third embodiment of the present invention.

[0013] Figure 6 is a schematic diagram of the acceleration constant adjusted by the motor driver with automatic torque adjustment mechanism according to the change of motor reverse rotation speed in the third embodiment of the present invention.

[0014] Figure 7 is a waveform diagram of the start-up waveform signal constructed by the motor driver with automatic start-up torque modulation mechanism according to the fourth embodiment of the present invention when the reverse speed of the motor is large.

[0015] Figure 8 is a waveform diagram of the start-up waveform signal constructed by the motor driver with automatic start-up torque modulation mechanism according to the fourth embodiment of the present invention when the reverse speed of the motor is small.

[0016] Figure 9 is a waveform diagram of multiple start-up waveform signals with different amplitudes constructed by the motor driver with an automatic start-up torque modulation mechanism according to the fifth embodiment of the present invention.

[0017] Figure 10 is a schematic diagram of a fan started by a motor driver with an automatic torque modulation mechanism according to the first to fifth embodiments of the present invention. Implementation

[0018] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. Furthermore, the accompanying drawings of the present invention are for simple illustrative purposes only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of protection of the present invention. In addition, the term "or" used herein should be interpreted to include, depending on the actual situation, any combination of any one or more of the associated listed items.

[0019] Please refer to Figure 1, which is a block diagram of a motor driver with an automatic torque modulation mechanism for starting according to a first embodiment of the present invention.

[0020] The motor driver of this invention is applicable to starting motors (MT). The motors (MT) to which the motor driver of this invention is applicable include single-phase motors, three-phase motors, or combinations thereof.

[0021] As shown in Figure 1, in a first embodiment, the motor driver of the present invention includes a motor state detection circuit 100, a start reference setting circuit 200, and a motor start circuit 300. The motor state detection circuit 100 is connected to the start reference setting circuit 200. The motor start circuit 300 is connected to the start reference setting circuit 200 and the motor MT.

[0022] The motor status detection circuit 100 detects the status data of the motor MT and outputs a motor status detection signal. The start reference setting circuit 200 sets multiple start parameters based on the motor MT status data contained in the motor status detection signal received from the motor status detection circuit 100.

[0023] The motor starting circuit 300 starts the motor MT based on multiple starting parameters received from the starting reference setting circuit 200, using multiple waveforms of a starting waveform signal, or by modulating a preset or previously modulated starting waveform signal.

[0024] It is worth noting that the state data of the motor MT detected by the motor state detection circuit 100 included in the motor driver of the present invention includes the rotation direction of the motor MT, wherein the rotation direction of the motor MT includes clockwise and counterclockwise rotation, or forward and reverse rotation. If necessary, the state data of the motor MT detected by the motor state detection circuit 100 may further include the rotational speed of the motor MT.

[0025] Therefore, the motor starting circuit 300 included in the motor driver of the present invention can set and adjust the starting action of the motor MT according to the current rotation direction (and speed) of the motor MT. Thus, the motor driver of the present invention can successfully start the motor MT whenever the motor MT is operating in any rotation direction (and speed). In particular, the motor driver of the present invention can still successfully start the motor MT to rotate forward even when the motor MT is rotating in reverse or when there is a headwind blowing towards the motor MT.

[0026] Please refer to Figure 2, which is a block diagram of a motor driver with an automatic torque modulation mechanism for starting according to a second embodiment of the present invention.

[0027] As shown in Figure 2, in the second embodiment, the motor driver of the present invention includes a motor state detection circuit 100, a start reference setting circuit 200, a motor start circuit 300, and a waveform signal generation circuit 400. The motor state detection circuit 100 includes a motor speed detection circuit 101 and a motor direction detection circuit 102. The motor start circuit 300 includes a control circuit 301, a drive circuit 302, and an output stage circuit 303.

[0028] The start-up reference setting circuit 200 is connected to the motor speed detection circuit 101, the motor direction detection circuit 102, and the control circuit 301. The drive circuit 302 is connected to the control circuit 301 and the output stage circuit 303. The output stage circuit 303 is connected to the motor MT. The waveform signal generation circuit 400 is connected to the drive circuit 302.

[0029] Motor speed detection circuit 101 detects the speed of motor MT and outputs a speed detection signal to start reference setting circuit 200. Motor direction detection circuit 102 detects the rotation direction of motor MT and outputs a direction detection signal to start reference setting circuit 200.

[0030] The start reference setting circuit 200 sets multiple start parameters based on a speed detection signal received from the motor speed detection circuit 101 and a steering detection signal received from the motor steering detection circuit 102.

[0031] The motor state detection circuit 100 can repeatedly detect multiple state data sets acquired by the motor MT. These multiple state data sets represent data from the motor MT detected within multiple time intervals. Each state data set includes the rotation direction and speed of the motor MT, where the rotation direction can include clockwise and counterclockwise rotation, and the speed can include high speed and low speed. The clockwise rotation can include the specified clockwise direction described below, and the counterclockwise rotation can include the specified counterclockwise direction described below.

[0032] The start-up reference setting circuit 200 can set multiple start-up parameter groups based on multiple status data groups contained in a motor status detection signal received from the motor status detection circuit 100. Each of the multiple start-up parameter groups contains multiple start-up parameters.

[0033] The control circuit 301 constructs multiple waveforms of multiple start-up waveform signals based on multiple start-up parameter groups received from the start-up reference setting circuit 200, or modulates multiple waveforms of multiple preset or previously modulated start-up waveform signals.

[0034] The waveform signal generation circuit 400 can output multiple reference waveform signals, or in practice, only one reference waveform signal.

[0035] The driving circuit 302 compares multiple voltages of multiple start-up waveform signals obtained from the waveform signal generation circuit 400 with multiple voltages of a reference waveform signal to determine multiple voltage levels of the multiple waveforms of the multiple driving signals, and outputs multiple driving signals. The start-up waveform signals may include multiple sine waves, multiple third harmonic waves, or any combination thereof. The reference waveform signals may include triangular waves, multiple sawtooth waves, or any combination thereof.

[0036] The output stage circuit 303 operates according to multiple drive signals received from the drive circuit 302 to output a motor start signal to the motor MT to start the motor MT. The output stage circuit 303 may include multiple upper bridge switches and multiple lower bridge switches, and the various configurations of these switches are well known in the art and are not described herein, nor are they limited thereto.

[0037] For example, when the motor MT rotates in the same direction as a specified clockwise direction, the control circuit 301 outputs a start-up waveform signal that is the same as the first start-up pattern waveform signal. Conversely, when the motor MT rotates in a different direction than this specified clockwise direction, the control circuit 301 outputs a start-up waveform signal that is the same as the second start-up pattern waveform signal. The parameters of the multiple waveforms of the second start-up pattern waveform signal, such as amplitude, are different from the parameters of the multiple waveforms of the first start-up pattern waveform signal, such as amplitude.

[0038] Alternatively, when the rotation direction of the motor MT is not the same as a specified reverse direction, the start-up waveform signal output by the control circuit 301 is the same as the first start-up pattern waveform signal. Conversely, when the rotation direction of the motor MT is the same as this specified reverse direction, the start-up waveform signal output by the control circuit 301 is the same as the second start-up pattern waveform signal.

[0039] Alternatively, when the motor MT rotates clockwise in a specified direction or the speed at which the motor MT rotates in a specified clockwise direction does not exceed a speed threshold, the start-up waveform signal output by the control circuit 301 is the same as the first start-up pattern waveform signal. Conversely, when the speed at which the motor MT rotates in this specified counter-clockwise direction exceeds a speed threshold, the start-up waveform signal output by the control circuit 301 is the same as the second start-up pattern waveform signal.

[0040] The motor MT may operate at different speeds along the same specified clockwise direction within multiple clockwise time intervals. Therefore, the control circuit 301 generates multiple clockwise start-up pattern waveform signals, each corresponding to a multiple reference speed range. Within each of the multiple clockwise time intervals, the start-up waveform signal output by the control circuit 301 is the same as the clockwise start-up pattern waveform signal corresponding to the reference speed range into which the motor MT's speed falls. The parameters (including amplitude and duty cycle) of the multiple waveforms in each of the multiple clockwise start-up pattern waveform signals are different from the parameters (including amplitude and duty cycle) of the multiple waveforms in other clockwise start-up pattern waveform signals.

[0041] The motor MT may also operate at different speeds along the same specified reverse direction within multiple reverse time intervals. Therefore, the control circuit 301 generates multiple reverse start pattern waveform signals, each corresponding to a multiple reference speed range. Within each of the multiple reverse time intervals, the start waveform signal output by the control circuit 301 is the same as the reverse start pattern waveform signal corresponding to the reference speed range into which the motor MT's speed falls. The parameters (including amplitude and duty cycle) of the multiple waveforms in each of the multiple reverse start pattern waveform signals are different from the parameters (including amplitude and duty cycle) of the multiple waveforms in other reverse start pattern waveform signals.

[0042] If necessary, the control circuit 301 can store multiple reference start-up parameter sets and their corresponding multiple start-up pattern waveform signals. The control circuit 301 can use a start-up pattern waveform signal corresponding to the reference start-up parameter set that is the same as the start-up parameter set set according to the currently detected motor MT status data set as a start-up waveform signal.

[0043] Please refer to Figures 3 to 6, where Figure 3 is a block diagram of the start reference setting circuit included in the motor driver with automatic start torque modulation mechanism according to the third embodiment of the present invention; Figure 4A is a schematic diagram of the duty cycle of the motor driver with automatic start torque modulation mechanism according to the third embodiment of the present invention, which is adjusted according to the change of motor reverse speed; Figure 4B is a schematic diagram of the duty cycle change of the start waveform signal of the motor driver with automatic start torque modulation mechanism according to the third embodiment of the present invention; Figure 5 is a schematic diagram of the acceleration time of the motor driver with automatic start torque modulation mechanism according to the change of motor reverse speed according to the third embodiment of the present invention; and Figure 6 is a schematic diagram of the acceleration constant of the motor driver with automatic start torque modulation mechanism according to the change of motor reverse speed according to the third embodiment of the present invention.

[0044] The multiple startup parameters set by the startup reference setting circuit 200 shown in Figures 1 and 2 may include duty cycle, acceleration time, acceleration constant, or any combination thereof, as shown in Figures 3 to 6.

[0045] As shown in Figure 2, the control circuit 301 can construct or modulate multiple waveforms of a start-up waveform signal SDT as shown in Figure 4B, based on the duty cycle, acceleration time, and acceleration constant set by the start-up reference setting circuit 200 as shown in Figures 3 to 6. The details are as follows.

[0046] As shown in Figures 1 and 2, the duty cycle of a starting waveform signal SDT constructed or modulated by the motor starting circuit 300 is the same as the duty cycle contained in the multiple starting parameters received from the starting reference setting circuit 200.

[0047] Those skilled in the art should know that the duty cycle of the start waveform signal SDT is the working period of the start waveform signal SDT divided by the sum of the working period and the non-working period of the waveform.

[0048] As shown in Figure 4A, the duty cycle change curve DT of the reverse start indicates that the duty cycle set by the start reference setting circuit 200 increases as the speed of the motor MT increases during reverse rotation. The duty cycle of the start waveform signal SDT, as shown in Figure 4B, constructed by the motor start circuit 300 based on the duty cycle set by the start reference setting circuit 200 (and the triangular wave signal TRG), also increases as the speed of the motor MT increases during reverse rotation.

[0049] It is worth noting that the larger the duty cycle of the starting waveform signal SDT output by the motor starting circuit 300 to the motor MT, the greater the torque applied to the motor MT.

[0050] Conversely, as shown in Figures 4A and 4B, when the motor MT rotates in a specified reverse direction, the duty cycle set by the start reference setting circuit 200 and the duty cycle of the start waveform signal SDT constructed or modulated by the motor start circuit 300 decrease as the speed of the motor MT decreases.

[0051] As shown in Figure 5, when the motor MT rotates in a specified reverse direction, the acceleration time set by the start reference setting circuit 200 and the acceleration constant set by the start reference setting circuit 200 as shown in Figure 6 increase with the increase of the speed of the motor MT.

[0052] When the reverse rotation speed of motor MT exceeds a reverse rotation speed threshold, the acceleration constant set by the start reference setting circuit 200, as shown in Figure 6, decreases as the rotation speed of motor MT increases.

[0053] Please refer to Figures 7, 8, and 10. Figure 7 is a waveform diagram of the starting waveform signal constructed by the motor driver with automatic starting torque modulation mechanism according to the fourth embodiment of the present invention when the reverse speed of the motor is relatively large. Figure 8 is a waveform diagram of the starting waveform signal constructed by the motor driver with automatic starting torque modulation mechanism according to the fourth embodiment of the present invention when the reverse speed of the motor is relatively small. Figure 10 is a schematic diagram of the fan started by the motor driver with automatic starting torque modulation mechanism according to the first to fifth embodiments of the present invention.

[0054] The motor driver of the present invention is suitable for starting the motor MT as shown in Figures 7 and 8, and the motor MT can be set in the fan FA as shown in Figure 10.

[0055] When a damaged fan FA inside an electronic device is replaced and removed as shown in Figure 10, there will be a reverse airflow into the space that originally housed the fan FA. This causes the motor of the new fan FA to reverse direction when the new fan FA is installed, driving the fan blades of the fan FA to reverse direction as well. Because the reverse airflow causes the fan blades to reverse, it creates resistance to the forward rotation of the starter motor MT, making it difficult to start the motor MT smoothly. Therefore, if you want the starter motor MT to rotate forward at the target speed, the starting torque applied to the motor MT of the fan FA that is reversing must be greater than the starting torque of the motor MT of the fan FA when there is no reverse airflow or no reversal.

[0056] In other words, the higher the speed at which the motor MT rotates in a specified reverse direction, the greater the amplitude of the multiple waveforms of a starting waveform signal set by the motor starting circuit 300.

[0057] For example, the rotational speed of a reverse speed signal SPA of motor MT as shown in FIG. 7 is greater than the rotational speed of a reverse speed signal SPB of motor MT as shown in FIG. 8. The amplitude of the back electromotive force signal BEMFA of motor MT as shown in FIG. 7 is greater than the amplitude of the back electromotive force signal BEMFB of motor MT as shown in FIG. 7. Therefore, the amplitudes of multiple waveforms of a starting waveform signal generated by the motor driver of the present invention in the example of FIG. 7 are respectively greater than the amplitudes of multiple waveforms of a starting waveform signal in the example of FIG. 8. The amplitudes of multiple waveforms of a motor current signal WSA supplied by the motor driver of the present invention to motor MT in the example of FIG. 7 are respectively greater than the amplitudes of multiple waveforms of a motor current signal WSB supplied to motor MT in the example of FIG. 8.

[0058] Please refer to Figure 9, which is a waveform diagram of multiple start-up waveform signals with different amplitudes constructed by the motor driver with an automatic start-up torque modulation mechanism according to the fifth embodiment of the present invention.

[0059] The motor driver of the present invention includes a motor starting circuit 300 or a control circuit 301 as shown in FIG1 and FIG2, which can set different multiple starting waveform signals according to the different rotation speeds of the motor MT along a specified reverse direction, including a starting waveform signal WS2 as shown in FIG9.

[0060] The peak values ​​of multiple waveforms in each of the multiple starting waveform signals, set according to different rotational speeds of the motor MT along a specified reverse direction, are different from the peak values ​​of multiple waveforms in the other multiple starting waveform signals. Therefore, the peak connection line formed by connecting the peak values ​​of multiple waveforms in each of the multiple starting waveform signals is different from the peak connection line formed by connecting the peak values ​​of multiple waveforms in the other multiple starting waveform signals. For example, the peak connection lines of the multiple starting waveform signals are the same as the peak connection lines P1~PN shown in Figure 9. Accordingly, the amplitudes of multiple waveforms in each of the multiple starting waveform signals are different from the amplitudes of multiple waveforms in the other multiple starting waveform signals.

[0061] In summary, this invention provides a motor driver with an automatic torque modulation mechanism for starting. The motor driver of this invention can set multiple starting parameters based on the motor's speed, direction of rotation, or a combination thereof, and construct or modulate a starting waveform signal for starting the motor based on these set starting parameters. In particular, when the motor reverses direction, the motor driver of this invention can construct or modulate a starting waveform signal currently suitable for starting the motor in a forward direction, thereby applying a larger starting torque to the motor and improving the success rate of motor starting in strong winds and reverse rotation conditions.

[0062] The above-disclosed content is only a preferred and feasible embodiment of the present invention, and is not intended to limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention specification and drawings are included in the scope of the patent application of the present invention.

[0063] 100: Motor Status Detection Circuit 200: Start reference setting circuit 300: Motor starting circuit MT: Motor 101: Motor speed detection circuit 102: Motor Steering Detection Circuit 301: Control Circuit 302: Drive circuit 303: Output stage circuit 400: Waveform signal generation circuit DT: Reversal Start-up Duty Cycle Change Curve SDT: Start Waveform Signal TRG: Triangular wave signal BEMFA, BEMFB: Back EMF signals SPA, SPB: Reverse speed signal WSA, WSB: Motor current signal WS2: Startup waveform signal P1~PN: Peak connection lines FA: Fan

Claims

1. A motor driver with an automatic torque modulation mechanism for starting, comprising: a motor state detection circuit configured to detect state data of a motor and output a motor state detection signal, wherein the state data of the motor includes a rotation direction of the motor; a start-up reference setting circuit connected to the motor state detection circuit, configured to set a plurality of start-up parameters based on the motor state detection signal; and a motor start-up circuit connected to the start-up reference setting circuit and the motor, configured to construct or modulate a plurality of waveforms of a start-up waveform signal based on the plurality of start-up parameters, and start the motor based on the start-up waveform signal; wherein... When the rotation direction of the motor is the same as a specified clockwise direction, the starting waveform signal output by the motor starting circuit is the same as a first starting pattern waveform signal; wherein, when the rotation direction of the motor is different from the specified clockwise direction, the starting waveform signal output by the motor starting circuit is the same as a second starting pattern waveform signal.

2. The motor driver with an automatic torque modulation mechanism as described in claim 1, wherein the rotation direction of the motor includes clockwise and counterclockwise rotation.

3. A motor driver with an automatic torque modulation mechanism as described in claim 1, wherein the motor starting circuit comprises: a control circuit connected to the starting reference setting circuit, configured to construct or modulate a plurality of waveforms of the starting waveform signal according to a plurality of the starting parameters, and output the starting waveform signal; a drive circuit connected to the control circuit, configured to output a drive signal according to the starting waveform signal; and an output stage circuit connected to the drive circuit and the motor, configured to output a motor starting signal to the motor according to the drive signal.

4. The motor driver with an automatic torque modulation mechanism as described in claim 1, wherein the plurality of said starting parameters include a duty cycle, an acceleration time, an acceleration constant, or any combination thereof.

5. A motor driver with an automatic torque adjustment mechanism as described in claim 1, wherein, When the rotation direction of the motor is different from a specified reverse direction, the starting waveform signal output by the motor starting circuit is the same as the first starting pattern waveform signal; wherein, when the rotation direction of the motor is the same as the specified reverse direction, the motor starting circuit outputs the second starting pattern waveform signal.

6. A motor driver with an automatic torque modulation mechanism as described in claim 1, wherein the state data of the motor further includes a rotational speed of the motor.

7. A motor driver with an automatic torque adjustment mechanism as described in claim 6, wherein, When the speed at which the motor rotates in the specified clockwise direction or in the specified counterclockwise direction does not exceed a speed threshold, the starting waveform signal output by the motor starting circuit is the same as the first starting pattern waveform signal; wherein, when the speed at which the motor rotates in the specified counterclockwise direction exceeds the speed threshold, the starting waveform signal output by the motor starting circuit is the same as the second starting pattern waveform signal.

8. A motor driver with an automatic torque modulation mechanism as described in claim 6, wherein the start-up reference setting circuit sets multiple start-up parameter groups based on multiple state data groups acquired by the motor obtained by the motor state detection circuit, each state data group including the motor speed and the rotation direction, and each start-up parameter group including multiple start-up parameters; wherein the motor start-up circuit constructs or modulates the start-up waveform signal according to each start-up parameter group.

9. A motor driver with an automatic torque adjustment mechanism as described in claim 6, wherein the motor status detection circuit comprises: a motor speed detection circuit connected to the start-up reference setting circuit, configured to detect the speed of the motor and output a speed detection signal; and a motor direction detection circuit connected to the start-up reference setting circuit, configured to detect the rotation direction of the motor and output a direction detection signal; wherein the motor status detection signal includes the speed detection signal and the direction detection signal.

10. A motor driver with an automatic torque modulation mechanism as described in claim 1, wherein, When the rotation direction of the motor is the same as the specified clockwise rotation direction, the start-up waveform signal output by the motor start-up circuit is the same as one of the multiple clockwise start-up pattern waveform signals.

11. The motor driver with an automatic torque modulation mechanism as described in claim 10, wherein the state data of the motor further includes a rotational speed of the motor, a plurality of forward rotation start pattern waveform signals respectively correspond to a plurality of reference speed ranges, and the start waveform signal output by the motor start circuit is the same as the forward rotation start pattern waveform signal corresponding to the reference speed range into which the rotational speed of the motor falls.

12. A motor driver with an automatic torque modulation mechanism as described in claim 1, wherein, When the rotation direction of the motor is the same as a specified reverse direction, the starting waveform signal output by the motor starting circuit is the same as one of a plurality of reverse starting pattern waveform signals.

13. The motor driver with an automatic torque modulation mechanism as described in claim 12, wherein the state data of the motor further includes a rotational speed of the motor, a plurality of reverse start pattern waveform signals respectively correspond to a plurality of reference speed ranges, and the start waveform signal output by the motor start circuit is the same as the reverse start pattern waveform signal corresponding to the reference speed range into which the rotational speed of the motor falls.

14. The motor driver with an automatic torque modulation mechanism as claimed in claim 1, further comprising: a waveform signal generation circuit connected to the motor starting circuit, configured to output a reference waveform signal; wherein the motor starting circuit is configured to compare a plurality of voltages of the starting waveform signal with a plurality of voltages of the reference waveform signal to determine a plurality of voltage levels of a plurality of waveforms of a motor starting signal, and output the motor starting signal to the motor.

15. The motor driver with an automatic torque modulation mechanism as described in claim 14, wherein the start-up waveform signal comprises a plurality of sine waves, a plurality of third harmonic waves, or any combination thereof.

16. The motor driver with an automatic torque modulation mechanism as described in claim 14, wherein the plurality of the reference waveform signals comprise a triangular wave waveform, a plurality of sawtooth wave waveforms, or any combination thereof.

17. A motor driver with an automatic torque modulation mechanism as described in claim 1, wherein the motor comprises a single-phase motor.

18. A motor driver with an automatic torque modulation mechanism as described in claim 1, wherein the motor comprises a three-phase motor.

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