Controllable driving apparatus for power load, and vehicle and working machine

Abstract

The present invention relates to the technical field of electronic circuits. Provided are a controllable driving apparatus for a power load, and a vehicle and a working machine. The apparatus comprises: a controller, a logic gate circuit, a pre-driver circuit and a power bridge arm, wherein the controller, the logic gate circuit, the pre-driver circuit and the power bridge arm are connected in sequence; the controller is used for generating a first control signal, and sending the first control signal to the logic gate circuit; the logic gate circuit is used for generating a second control signal on the basis of the first control signal, and sending the second control signal to the pre-driver circuit; the pre-driver circuit is used for generating a third control signal on the basis of the second control signal; and the third control signal is used for controlling the driving of a power load in the power bridge arm. In the technical solution of the present invention, the controller generates the first control signal, and the first control signal passes through the logic gate circuit and the pre-driver circuit to generate the third control signal, which is capable of controlling the driving of the power load in the power bridge arm, thereby realizing controllable driving of the load, and meeting various requirements for driving the load.

Description

Controllable drives, vehicles, and operating machinery for power loads

[0001] This application claims priority to Chinese Patent Application No. 202411579459.1, filed on November 7, 2024, entitled "Controllable Drive Device for Power Load, Vehicle and Working Machinery", the entire contents of which are incorporated herein by reference. Technical Field

[0002] The embodiments of this application relate to, but are not limited to, the field of electronic circuit technology, and particularly to controllable drive devices, vehicles, and operating machinery for power loads. Background Technology

[0003] As controllers become more integrated, the objects they control also become more diverse, thus requiring them to drive loads with higher power.

[0004] Existing technologies drive loads using a fixed power supply, but this driving process is uncontrollable and therefore cannot meet the various demands of the load. Summary of the Invention

[0005] This invention provides a controllable drive device, vehicle, and operating machinery for power loads, addressing the shortcomings of existing technologies that drive loads via a fixed power supply, where the driving process is uncontrollable and thus fails to meet various load requirements. The invention's solution generates a first control signal via a controller, and this first control signal, after passing through logic gate circuits and a pre-drive circuit, generates a third control signal that controls the power load in the drive power bridge arm, achieving controllable load drive and meeting various load drive requirements.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A first aspect of this application provides a controllable drive device for a power load, comprising: a controller, a logic gate circuit, a pre-drive circuit, and a power bridge arm; the controller, the logic gate circuit, the pre-drive circuit, and the power bridge arm are connected in sequence.

[0008] The controller is used to generate a first control signal and send the first control signal to the logic gate circuit;

[0009] The logic gate circuit is used to generate a second control signal based on the first control signal, and send the second control signal to the pre-drive circuit;

[0010] The pre-drive circuit is used to generate a third control signal based on the second control signal; the third control signal is used to control the power load in the power bridge arm.

[0011] In one alternative embodiment, the first control signal includes an initial pulse width modulation (PWM) signal and an enable signal; the frequency and duty cycle of the initial PWM signal are determined by timers and registers in the controller.

[0012] In one alternative embodiment, the logic gate circuit includes a first NOT gate, a first AND gate, and a second AND gate;

[0013] The first input terminal of the first AND gate receives the initial PWM signal, and the second input terminal of the first AND gate receives the enable signal;

[0014] The input terminal of the first NOT gate receives the initial PWM signal, and the output terminal of the first NOT gate is connected to the first input terminal of the second AND gate;

[0015] The second input terminal of the second AND gate receives the enable signal.

[0016] In one optional embodiment, the second control signal includes a first PWM signal and a second PWM signal;

[0017] The output of the first AND gate sends the first PWM signal to the pre-drive circuit.

[0018] The output of the second AND gate sends the second PWM signal to the pre-drive circuit.

[0019] In one optional embodiment, the pre-drive circuit includes a pre-drive chip; the power bridge arm further includes an upper bridge arm MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) and a lower bridge arm MOSFET; the third control signal includes a first PWM control signal and a second PWM control signal.

[0020] The pre-driver chip is used to generate the first PWM control signal and the second PWM control signal based on the first PWM signal and the second PWM signal;

[0021] The first PWM control signal is used to control whether the upper bridge arm MOSFET is turned on;

[0022] The second PWM control signal is used to control whether the lower bridge arm MOSFET is turned on.

[0023] In one alternative embodiment, the power bridge arm further includes a drive power supply;

[0024] When the upper bridge arm MOSFET and the lower bridge arm MOSFET are alternately turned on, the first electrical signal generated by the driving power supply is modulated by the first PWM control signal and the second PWM control signal to control the driving of the power load.

[0025] In one optional embodiment, the power bridge arm further includes a detection circuit; the detection circuit includes a detection resistor and a detection capacitor;

[0026] One end of the sensing resistor is connected to the power load, and the other end of the sensing resistor is connected to the controller and the sensing capacitor, respectively.

[0027] The voltage across the detection capacitor is used to characterize the operating state of the power load.

[0028] In one optional embodiment, the power bridge arm further includes a circuit switch; the circuit switch is connected to the controller;

[0029] The controller is also used to generate a switch control signal; the switch control signal is used to control the circuit switch to be turned on or off.

[0030] A second aspect of this application provides a vehicle including a controllable drive device for power load as described in any of the embodiments of the first aspect.

[0031] A third aspect of this application provides a working machine, including a controllable drive device for power load as described in any of the embodiments of the first aspect, and / or, including a vehicle as described in any of the embodiments of the second aspect.

[0032] The controllable drive device, vehicle, and operating machinery for power loads provided in the embodiments of this application have the following advantages:

[0033] The controllable drive device includes a controller, logic gate circuits, a pre-drive circuit, and a power bridge arm; the controller, logic gate circuit, pre-drive circuit, and power bridge arm are connected sequentially. The controller generates a first control signal and sends it to the logic gate circuit. The logic gate circuit generates a second control signal based on the first control signal and sends it to the pre-drive circuit. The pre-drive circuit generates a third control signal based on the second control signal. The third control signal controls the power load in the power bridge arm. This invention generates a first control signal through the controller, and the third control signal generated by the logic gate circuit and pre-drive circuit controls the power load in the power bridge arm, achieving controllable drive of the load and meeting various load drive requirements.

[0034] In addition to the technical problems solved by the embodiments of this disclosure, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the bucket-based fitness components and fitness devices provided by the embodiments of this disclosure, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 is one of the structural schematic diagrams of the controllable drive device for power load provided by the present invention;

[0037] Figure 2 is a second schematic diagram of the structure of the controllable drive device for power load provided by the present invention;

[0038] Figure 3 is a schematic diagram of the complementary PWM signal provided by the present invention;

[0039] Figure 4 is a schematic diagram of the detection circuit and power load provided by the present invention. Detailed Implementation

[0040] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0041] To address the aforementioned problems in the prior art, the present invention provides a controllable drive device for power loads. Figure 1 is one of the structural schematic diagrams of the controllable drive device for power loads provided by the present invention. As shown in Figure 1, the device includes the following:

[0042] The system comprises a controller, logic gates, a pre-drive circuit, and a power bridge arm; the controller, logic gates, pre-drive circuit, and power bridge arm are connected in sequence; the controller generates a first control signal and sends the first control signal to the logic gates; the logic gates generate a second control signal based on the first control signal and send the second control signal to the pre-drive circuit; the pre-drive circuit generates a third control signal based on the second control signal; the third control signal is used to control the power load in the power bridge arm.

[0043] Specifically, the controller is connected to a logic gate circuit, which in turn is connected to a pre-drive circuit, which is then connected to the power bridge arm. After generating a first control signal, the controller sends it to the logic gate circuit. Upon receiving the first control signal, the logic gate circuit generates a second control signal based on it and sends this second control signal to the pre-drive circuit. Upon receiving the second control signal, the pre-drive circuit generates a third control signal based on it and sends this third control signal to the power bridge arm. This third control signal, transmitted to the power bridge arm, can control and drive the power load within it.

[0044] In one embodiment, the first control signal includes an initial PWM signal and an enable signal; the frequency and duty cycle of the initial PWM signal are determined by a timer and a register in the controller.

[0045] Specifically, the first control signal includes an initial pulse width modulation (PWM) signal and an enable signal. The controller generates the initial PWM signal and the enable signal and sends them to the logic gate circuit. The pin through which the controller sends the enable signal can be a general-purpose input / output (GPIO) pin. The frequency and duty cycle of the initial PWM signal are determined by a timer in the controller and registers associated with the initial PWM signal, and these timers and registers can be preset.

[0046] In the above embodiments, the first control signal includes an initial PWM signal and an enable signal. The PWM signal consumes power only during the pulse period, and the pulse signal has a narrow bandwidth and a concentrated spectral distribution, so it will not interfere with other signals in other frequency bands, thus exhibiting high efficiency. Simultaneously, PWM technology can achieve efficient energy conversion and reduce energy loss. Furthermore, by precisely controlling the pulse width, the PWM signal can achieve high control precision, enabling subsequent accurate control of the driving power load.

[0047] In one embodiment, the logic gate circuit includes a first NOT gate, a first AND gate, and a second AND gate; the first input terminal of the first AND gate receives the initial PWM signal, and the second input terminal of the first AND gate receives the enable signal; the input terminal of the first NOT gate receives the initial PWM signal, and the output terminal of the first NOT gate is connected to the first input terminal of the second AND gate; the second input terminal of the second AND gate receives the enable signal.

[0048] Specifically, Figure 2 is a second schematic diagram of the controllable drive device for power loads provided by the present invention. As shown in Figure 2, the logic gate circuit includes a first NOT gate, a first AND gate, and a second AND gate. The initial PWM signal generated by the controller is input to the first input terminal of the first AND gate, and the enable signal generated by the controller is input to the second input terminal of the first AND gate. In addition, the initial PWM signal generated by the controller also passes through the first NOT gate, and the signal after conversion by the first NOT gate is input to the first input terminal of the second AND gate. The enable signal generated by the controller is also input to the second input terminal of the second AND gate.

[0049] It should be noted that since the internal conversion time of the first NOT gate is on the nanosecond level, while the PWM signal period is on the millisecond level, the time delay of the first NOT gate in converting the initial PWM signal is negligible. Furthermore, the signals at the first input terminals of the first AND gate and the second AND gate can be considered as two complementary PWM signals. Figure 3 is a schematic diagram of the complementary PWM signals provided by this invention, and the signals at the first input terminals of the first AND gate and the second AND gate can be as shown in Figure 3.

[0050] In one embodiment, the second control signal includes a first PWM signal and a second PWM signal; the output of the first AND gate sends the first PWM signal to the pre-drive circuit; and the output of the second AND gate sends the second PWM signal to the pre-drive circuit.

[0051] Specifically, the second control signal includes a first PWM signal and a second PWM signal. As easily understood, as shown in Figure 2, the initial PWM signal and the enable signal are respectively used as inputs to the first AND gate, causing the first AND gate to output the first PWM signal. The signal obtained after the initial PWM signal passes through the first NOT gate and the enable signal are respectively used as inputs to the second AND gate, causing the second AND gate to output the second PWM signal. Further, the first PWM signal and the second PWM signal are sent to the pre-drive circuit.

[0052] For example, if the initial PWM signal is 101 and the enable signal is 110, then the inputs of the first AND gate are 101 and 110, and the first PWM signal output by the first AND gate is 100. The inputs of the second AND gate are 010 and 110, and the second PWM signal output by the second AND gate is 010.

[0053] In the two embodiments described above, by setting the first NOT gate, the first AND gate, and the second AND gate and their connection relationship, the initial PWM signal and the enable signal are gradually converted into the first PWM signal and the second PWM signal, which provides the basis for the input of the pre-drive circuit and makes the subsequent driving of the power load more controllable.

[0054] In one embodiment, the pre-drive circuit includes a pre-drive chip; the power bridge arm further includes an upper bridge arm MOSFET and a lower bridge arm MOSFET; the third control signal includes a first PWM control signal and a second PWM control signal; the pre-drive chip is used to generate the first PWM control signal and the second PWM control signal based on the first PWM signal and the second PWM signal; the first PWM control signal is used to control whether the upper bridge arm MOSFET is turned on; the second PWM control signal is used to control whether the lower bridge arm MOSFET is turned on.

[0055] Specifically, as shown in Figure 2, the pre-driver circuit includes a pre-driver chip. The power bridge arm may also include an upper bridge arm MOSFET Q1 and a lower bridge arm MOSFET Q2. The third control signal includes a first PWM control signal and a second PWM control signal. It is easy to understand that the upper bridge arm MOSFET can be an N-channel MOSFET or a P-channel MOSFET. The example in Figure 2 is an N-channel MOSFET, and this embodiment of the invention does not impose specific limitations. MOSFET stands for Metal-Oxide-Semiconductor Field-Effect Transistor. After the first and second PWM signals are processed by the pre-driver chip, the pre-driver chip can output the first and second PWM control signals. The function of the pre-driver chip is to boost the voltage value of the signals to a level sufficient to drive the upper and lower bridge arm MOSFETs. The pre-driver chip can be of models such as L9945 and L9908, and this embodiment of the invention does not impose specific limitations.

[0056] Furthermore, the first PWM control signal can be used to control whether the upper bridge arm MOSFET is turned on, and the second PWM control signal can be used to control whether the lower bridge arm MOSFET is turned on. It is easy to understand that under the action of the first and second PWM control signals, the upper and lower bridge arm MOSFETs are turned on alternately, and the upper and lower bridge arm MOSFETs cannot be turned on simultaneously.

[0057] In the above embodiment, the pre-driver chip generates a first PWM control signal and a second PWM control signal based on the first PWM signal and the second PWM signal. The first PWM control signal is used to control whether the upper bridge arm MOSFET is turned on, and the second PWM control signal is used to control whether the lower bridge arm MOSFET is turned on. Existing technologies typically use software to control the upper and lower bridge arm MOSFETs. However, when the controller has many real-time tasks, control failures may occur, leading to simultaneous conduction of both the upper and lower bridge arm MOSFETs and burning out the circuit. This embodiment, however, implements hardware circuit structure to control the upper and lower bridge arm MOSFETs, ensuring that they can conduct alternately and avoiding simultaneous conduction.

[0058] In one embodiment, the power bridge arm further includes a drive power supply;

[0059] When the upper bridge arm MOSFET and the lower bridge arm MOSFET are alternately turned on, the first electrical signal generated by the driving power supply is modulated by the first PWM control signal and the second PWM control signal to control the driving of the power load.

[0060] Specifically, as shown in Figure 2, the power bridge arm also includes a drive power supply VBAT. When the upper and lower bridge arm MOSFETs are alternately turned on, the first electrical signal generated by the drive power supply VBAT is modulated by a first PWM control signal and a second PWM control signal. The modulated first electrical signal can control the drive power load. It is easy to understand that the waveform of this first electrical signal is a square wave, and its frequency and duty cycle are adjustable, thereby achieving the purpose of controllable drive of the power load. It should be noted that the frequency and duty cycle of the first electrical signal are determined by the frequency and duty cycle of the initial PWM signal, and the frequency and duty cycle of the first electrical signal are the same as those of the initial PWM signal. In the method of this invention, the user can adjust the frequency and duty cycle of the first and second PWM control signals by setting the frequency and duty cycle of the initial PWM signal, thereby changing the conduction time of the upper and lower bridge arm MOSFETs. The changes in the conduction time of the upper and lower bridge arm MOSFETs cause a correlated change in the frequency and duty cycle of the first electrical signal. The change in the duty cycle of the first electrical signal affects the magnitude of the voltage corresponding to the modulated first electrical signal. With a constant output current, the change in the voltage of the modulated first electrical signal leads to a change in the output power, thereby achieving controllable driving of the power load.

[0061] In the above embodiments, when the upper bridge arm MOSFET and the lower bridge arm MOSFET are alternately turned on, the electrical signal generated by the driving power supply is modulated by the first PWM control signal and the second PWM control signal, so that the power supply's driving of the power load changes from uncontrollable to controllable.

[0062] In one embodiment, the power bridge arm further includes a detection circuit; the detection circuit includes a detection resistor and a detection capacitor; one end of the detection resistor is connected to the power load, and the other end of the detection resistor is connected to the controller and the detection capacitor respectively; the voltage across the detection capacitor is used to characterize the operating state of the power load.

[0063] Specifically, as shown in Figure 2, the power bridge arm may further include a detection circuit. Figure 3 is a schematic diagram of the detection circuit and power load provided by the present invention. As shown in Figure 3, the detection circuit includes a detection resistor R and a detection capacitor C. One end of the detection resistor R is connected to the power load L, and the other end of the detection resistor R is connected to the controller (the port marked Vs can be connected to the controller) and the detection capacitor C. The voltage across the detection capacitor is used to characterize the operating state of the power load. The voltage across the detection capacitor can be transmitted to the controller, which determines the operating state of the power load based on this voltage and a preset voltage range. The port marked Vs in Figure 3 can also be first connected to one end of a signal conditioning circuit. This signal conditioning circuit is used to condition the voltage across the detection capacitor into a signal usable by the controller, and then the other end of the signal conditioning circuit is connected to the controller.

[0064] It should be noted that the detection circuit works by forming an RLC resonant circuit with the power load L, the detection resistor R, and the detection capacitor C. At the instant the power load operates, the value of L increases. Therefore, according to the characteristics of the RLC resonant circuit, whether the load is operating normally can be reflected by the voltage across capacitor C. Furthermore, the excitation signal for the detection circuit can be a first electrical signal modulated by a first PWM control signal and a second PWM control signal.

[0065] In the above embodiment, the power bridge arm also includes a detection circuit, which includes a detection resistor and a detection capacitor. One end of the detection resistor is connected to the power load, and the other end of the detection resistor is connected to the controller and the detection capacitor respectively. This makes the RLC resonant circuit formed by the power load, the detection resistor, and the detection capacitor possible, so that the controller can know the operating status of the power load by detecting the voltage across the detection capacitor, which facilitates real-time monitoring of the power load.

[0066] In one embodiment, the power bridge arm further includes a circuit switch; the circuit switch is connected to the controller; the controller is also configured to generate a switch control signal; the switch control signal is used to control the circuit switch to open or close.

[0067] Specifically, as shown in Figure 2, the power bridge arm also includes a circuit switch, which is connected to the controller. The controller can generate a switch control signal, which can control the opening and closing of the circuit switch. It is easy to understand that when the circuit switch is on, the power bridge arm operates normally; when the circuit switch is off, the power bridge arm is de-energized.

[0068] In the above embodiments, the power bridge arm also includes a circuit switch, which is connected to the controller. The controller is also used to generate a switch control signal, which is used to control the opening or closing of the circuit switch, so that the controller can control the opening and closing state of the power bridge arm, which facilitates the driving process of the power load.

[0069] The present invention provides a controllable drive device for power loads, comprising: a controller, logic gate circuits, a pre-drive circuit, and a power bridge arm; the controller, logic gate circuits, pre-drive circuit, and power bridge arm are connected sequentially. The controller generates a first control signal and sends it to the logic gate circuit. The logic gate circuit generates a second control signal based on the first control signal and sends it to the pre-drive circuit. The pre-drive circuit generates a third control signal based on the second control signal. The third control signal controls the power load in the power bridge arm. The present invention generates a first control signal through the controller, and the third control signal generated by the logic gate circuit and the pre-drive circuit controls the power load in the power bridge arm, achieving controllable drive of the load and meeting various load drive requirements.

[0070] This invention also provides a vehicle including the controllable drive device for power load described above. This vehicle can be a new energy vehicle or a traditional energy vehicle; this invention does not impose specific limitations here.

[0071] The present invention also provides a working machine, including the controllable drive device for power load described above, and / or including the vehicle described above.

[0072] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0075] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0076] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0077] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0078] It should be noted that the embodiments referred to in the specification, such as "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments," may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0080] After reading and understanding the accompanying diagrams and detailed descriptions, the other aspects can be understood.

Claims

1. A controllable drive device for power loads, characterized in that, include: The system comprises a controller, logic gates, a pre-drive circuit, and a power bridge arm; the controller, logic gates, pre-drive circuit, and power bridge arm are connected in sequence. The controller is used to generate a first control signal and send the first control signal to the logic gate circuit; The logic gate circuit is used to generate a second control signal based on the first control signal, and send the second control signal to the pre-drive circuit; The pre-drive circuit is used to generate a third control signal based on the second control signal; the third control signal is used to control the power load in the power bridge arm.

2. The controllable drive device for power loads according to claim 1, characterized in that, The first control signal includes an initial PWM signal and an enable signal; the frequency and duty cycle of the initial PWM signal are determined by the timer and register in the controller.

3. The controllable drive device for power loads according to claim 2, characterized in that, The logic gate circuit includes a first NOT gate, a first AND gate, and a second AND gate; The first input terminal of the first AND gate receives the initial PWM signal, and the second input terminal of the first AND gate receives the enable signal; The input terminal of the first NOT gate receives the initial PWM signal, and the output terminal of the first NOT gate is connected to the first input terminal of the second AND gate; The second input terminal of the second AND gate receives the enable signal.

4. The controllable drive device for power loads according to claim 3, characterized in that, The second control signal includes a first PWM signal and a second PWM signal; The output of the first AND gate sends the first PWM signal to the pre-drive circuit. The output of the second AND gate sends the second PWM signal to the pre-drive circuit.

5. The controllable drive device for power loads according to claim 4, characterized in that, The pre-drive circuit includes a pre-drive chip; the power bridge arm also includes an upper bridge arm MOSFET and a lower bridge arm MOSFET; the third control signal includes a first PWM control signal and a second PWM control signal. The pre-driver chip is used to generate the first PWM control signal and the second PWM control signal based on the first PWM signal and the second PWM signal; The first PWM control signal is used to control whether the upper bridge arm MOSFET is turned on; The second PWM control signal is used to control whether the lower bridge arm MOSFET is turned on.

6. The controllable drive device for power loads according to claim 5, characterized in that, The power bridge arm also includes a drive power supply; When the upper bridge arm MOSFET and the lower bridge arm MOSFET are alternately turned on, the first electrical signal generated by the driving power supply is modulated by the first PWM control signal and the second PWM control signal to control the driving of the power load.

7. The controllable drive device for power loads according to claim 6, characterized in that, The power bridge arm further includes a detection circuit; the detection circuit includes a detection resistor and a detection capacitor; One end of the sensing resistor is connected to the power load, and the other end of the sensing resistor is connected to the controller and the sensing capacitor, respectively. The voltage across the detection capacitor is used to characterize the operating state of the power load.

8. The controllable drive device for a power load according to any one of claims 1 to 7, characterized in that, The power bridge arm also includes a circuit switch; the circuit switch is connected to the controller; The controller is also used to generate a switch control signal; the switch control signal is used to control the circuit switch to be turned on or off.

9. A vehicle comprising a controllable drive device for a power load as described in any one of claims 1 to 8.

10. A working machine, comprising a controllable drive device for a power load as described in any one of claims 1 to 8, and / or, comprising a vehicle as described in claim 9.

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