Processing device of direct-current driving power supply, motor driving circuit and motor

Abstract

The invention discloses a processing device of a direct-current driving power supply, a motor driving circuit and a motor. The device comprises a primary protection unit, a first voltage stabilizing unit and a filtering unit, wherein the primary protection unit is used for carrying out primary protection processing on direct-current voltage provided by the direct-current power supply and then outputting the direct-current voltage; the first voltage stabilization unit is used for carrying out first voltage stabilization processing on direct current voltage provided by the direct current power supply and then outputting the direct current voltage; and the filtering unit is used for filtering the DC voltage provided by the DC power supply and then outputting the DC voltage. According to the scheme, the direct current voltage input from the input port of the direct current power supply is subjected to primary protection processing, primary voltage stabilization processing and filtering processing, so that the stability of the output voltage is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of power supplies, and particularly relates to a processing device for a DC drive power supply, a motor drive circuit, and a motor, and more particularly to a filter voltage stabilization circuit, a motor drive circuit, and a motor for a DC drive power supply (such as the VCCin power supply of a motor drive circuit). Background Art

[0002] The device drive power supply (such as the power supply of a motor drive circuit) usually requires a stable VCCin power supply (i.e., a DC power supply) to ensure normal operation.

[0003] However, in the related solutions, the voltage stabilization circuit of the VCCin power supply adopts a traditional linear voltage stabilization circuit model, and the stability of the output voltage is poor, which easily leads to a decline in the performance of the device (such as a motor) or a circuit failure.

[0004] The above content is only used to assist in understanding the technical solution of the present invention, and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The purpose of the present invention is to provide a processing device for a DC drive power supply, a motor drive circuit, a motor, and a voltage detection method thereof, so as to solve the problem that in the related solutions, the voltage stabilization circuit of the VCCin power supply adopts a traditional linear voltage stabilization circuit model, and the stability of the output voltage is poor, which easily leads to a decline in the performance of the device (such as a motor) or a circuit failure, and achieve the effect of improving the stability of the output voltage by performing primary protection processing, first voltage stabilization processing, and filtering processing on the DC voltage input from the input port of the self-DC power supply.

[0006] The present invention provides a processing device for a DC drive power supply, which is applied to process the DC power supply of the drive circuit of a device and then supply power to the drive circuit of the device; the processing device for the DC drive power supply includes: a primary protection unit, a first voltage stabilization unit, and a filtering unit; wherein, the primary protection unit is used to perform primary protection processing on the DC voltage provided by the DC power supply and then output it; the first voltage stabilization unit is used to perform first voltage stabilization processing on the DC voltage provided by the DC power supply and then output it; the filtering unit is used to perform filtering processing on the DC voltage provided by the DC power supply and then output it.

[0007] In some embodiments, the first voltage stabilization unit is located behind the primary protection unit; the filtering unit is located behind the first voltage stabilization unit.

[0008] In some embodiments, the primary protection unit includes: an electrostatic discharge tube or a transient voltage suppression diode; and / or, the first voltage regulation unit includes: a first voltage regulation diode; and / or, the filtering unit includes: an LRC filter.

[0009] In some embodiments, the LRC filter includes: an inductor module, a first resistor module, and a first capacitor module; wherein, the input port of the DC power supply is grounded via the electrostatic discharge tube or the transient voltage suppression diode; the input port of the DC power supply is also connected to the cathode of the first voltage regulation diode; the anode of the first voltage regulation diode is grounded; the input port of the DC power supply is also grounded via the inductor module and the first resistor module, and the capacitor module is connected in parallel with the first resistor module; the common end of the inductor module and the first resistor module serves as the output end of the filtering unit.

[0010] In some embodiments, it further includes at least one of a display unit, a current limiting unit, and a second voltage regulation unit; wherein, the display unit is configured to detect the DC voltage output from at least one of the primary protection unit, the first voltage regulation unit, and the filtering unit, and initiate a prompt message when the detected voltage exceeds a set voltage range; the second voltage regulation unit is configured to perform a second voltage regulation process on the DC voltage output from at least one of the primary protection unit, the first voltage regulation unit, and the filtering unit and then output it; the current limiting unit is configured to perform a current limiting process on the DC voltage output from at least one of the primary protection unit, the first voltage regulation unit, and the filtering unit and then output it.

[0011] In some embodiments, the display unit is located at the output end of the filtering unit; the second voltage regulation unit is located at the output end of the filtering unit; the current limiting unit is located behind the second voltage regulation unit.

[0012] In some embodiments, the second voltage regulation unit includes: a second voltage regulation diode; and / or, the current limiting unit includes: a first current limiting module and a second current limiting module; the first current limiting module and the second current limiting module are arranged in parallel.

[0013] In some embodiments, the output end of the filtering unit is connected to the cathode of the second voltage regulation diode; the anode of the second voltage regulation diode is grounded; the output end of the filtering unit is also connected to the power supply end of the driving circuit of the device via the current limiting unit.

[0014] Matched with the above device, on the other hand, the present invention provides a motor drive circuit, including: the processing device of the above DC drive power supply.

[0015] Matched with the above device, on the other hand, the present invention provides a motor, including: the processing device of the DC drive power supply described above, or the motor drive circuit described above.

[0016] Thus, in the solution of the present invention, for the DC power supply used to supply power to the drive circuit (such as the motor drive circuit), a primary protection unit (such as an electrostatic discharge tube ESD or a transient voltage suppression diode TVS), a first voltage stabilizing unit (such as a voltage stabilizing diode Z1), and a filtering unit (such as a filtering circuit composed of an inductor L1, a resistor R1, and a capacitor C1) are provided at the input port of the DC power supply. The primary protection unit is used to perform primary protection processing on the DC voltage input from the input port of the DC power supply; the first voltage stabilizing unit is used to perform the first voltage stabilizing processing on the DC voltage after the primary protection processing; the filtering unit is used to perform filtering processing on the DC voltage after the first voltage stabilizing processing and then output it; thereby, by performing primary protection processing, the first voltage stabilizing processing, and filtering processing on the DC voltage input from the input port of the DC power supply, the stability of the output voltage is improved.

[0017] Furthermore, in the solution of the present invention, a second voltage stabilizing unit and a current limiting unit are provided behind the first voltage stabilizing unit. The second voltage stabilizing unit is used to perform the second voltage stabilizing processing on the output voltage of the filtering unit; the current limiting unit is used to perform current limiting processing on the DC voltage after the processing of the second voltage stabilizing unit, so as to better adjust the DC voltage input from the input port of the DC power supply to the voltage range required by the drive circuit; thereby, by performing the second voltage stabilizing processing and current limiting processing on the output voltage of the filtering unit, the stability of the output voltage can be further improved.

[0018] Other features and advantages of the present invention will be described in the subsequent description, and part of them will become obvious from the description, or will be understood by implementing the present invention.

[0019] Next, through the drawings and embodiments, the technical solution of the present invention will be further described in detail. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of an embodiment of the processing device of the DC drive power supply of the present invention;

[0021] Figure 2 It is a schematic structural diagram of another embodiment of the processing device of the DC drive power supply of the present invention;

[0022] Figure 3 It is a schematic structural diagram of an embodiment of the filtering and voltage stabilizing circuit;

[0023] Figure 4 It is a schematic structural diagram of an embodiment of the linear voltage stabilizing circuit model in the related solution;

[0024] Figure 5 It is a schematic structural diagram of an embodiment of a motor interface circuit. Detailed implementation manners

[0025] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Considering that devices (such as motors) are widely used in various industrial and consumer electronic products, and their performance and reliability directly affect the operation of the entire system where the motor is located. And the stability of the power supply is related to the performance, lifespan and safety of the motor. A stable power supply can ensure that the motor can operate efficiently and reliably under various working conditions. The motor drive circuit usually requires a stable VCCin power supply (i.e., a DC power supply) to ensure normal operation. However, in related solutions, the voltage stabilization circuit of the VCCin power supply adopts a traditional linear voltage stabilization circuit model, and the stability of the output voltage is poor, which easily leads to a decline in the performance of devices (such as motors) or circuit failures.

[0027] In related solutions, the linear voltage stabilization circuit of the VCCin power supply (i.e., the DC power supply) of the motor drive circuit uses a voltage-controlled current source to forcibly generate a fixed voltage at the output end of the voltage regulator, and adjusts the current source according to the load demand to maintain the output voltage at the desired value. Figure 4 It is a schematic structural diagram of an embodiment of the linear voltage stabilization circuit model in related solutions. Figure 4 In it, Vin is the electrical element input, RPASS is the transmission element, RLOAD is the load resistor, and VOUT is the target output voltage. As Figure 4 shown, the linear voltage stabilization circuit model of the VCCin power supply (i.e., the DC power supply) of the motor drive circuit in related solutions can be simulated by two resistors (such as resistor RPASS and resistor RLOAD) and an input voltage Vin. In Figure 4In the example shown, the parameters of the output voltage VOUT are constant, while other parameters change; the input voltage Vin may change due to external interference, and the load current may change due to the dynamic changes in the operating conditions of the load. It can be seen that in the related solutions, the linear voltage regulator circuit of the VCCin power supply (i.e., the DC power supply) of the motor drive circuit has poor output voltage stability when the load changes or the input voltage fluctuates rapidly, which is likely to cause a decline in motor performance or circuit faults; in addition, the anti-interference ability of the linear voltage regulator circuit of the VCCin power supply (i.e., the DC power supply) in the related solutions is weak: in an environment with severe electromagnetic interference, the linear voltage regulator circuit is easily interfered with, resulting in unstable output voltage.

[0028] That is to say, in the related solutions, the voltage regulator circuit of the VCCin power supply (i.e., the DC power supply) of the motor drive circuit has poor output voltage stability when the load changes or the input voltage fluctuates, which is likely to cause a decline in motor performance or circuit faults. In addition, the anti-interference ability of the voltage regulator circuit of the VCCin power supply in the related solutions is weak: in an environment with severe electromagnetic interference, the voltage regulator circuit of the VCCin power supply in the related solutions is easily interfered with, resulting in unstable output voltage.

[0029] The interface power supply of the motor consists of two parts. One part provides the power supply voltage for the motor, which is marked with the symbol P in the solution of the present invention, and the general rated voltage is DC310V (i.e., 310V direct current); the other part is used to provide the motor drive power supply, which is represented by VCCin in the solution of the present invention, and the general drive voltage is DC 15V (i.e., 15V direct current). DC310V and VCCin are provided by the main control circuit of the motor. When the VCCin power supply in the main control circuit fluctuates, the corresponding motor drive power supply will also fluctuate.

[0030] The main board of the motor drive circuit is controlled by the host computer. The host computer includes a circuit composed of a microcontroller unit (MCU). VCCin is actually the power supply output by the main board. VCCin is the voltage provided by the main board for the motor drive. The main board includes various functions such as drive, power supply, and communication. The stability of this voltage source VCCin is crucial for ensuring the normal operation of the motor drive circuit. However, in actual applications, the fluctuation of the grid voltage or the instability of the power supply output by the host computer may cause an increase or decrease in the VCCin voltage. In addition, the load resistance R output by the VO port L may also change during use, and these factors will all affect the performance of the motor drive circuit.

[0031] Therefore, the solution of the present invention proposes a processing device for a DC drive power supply, specifically a filter and voltage stabilization circuit for a DC drive power supply (such as the filter and voltage stabilization circuit of the VCCin power supply of a motor drive circuit). A primary protection unit (such as an electrostatic discharge tube ESD or a transient voltage suppression diode TVS), a first voltage stabilization unit (such as a voltage stabilizing diode Z1), and a filtering unit (such as a filtering circuit composed of an inductor L1, a resistor R1, and a capacitor C1) are provided at the input port of the DC power supply. After performing primary protection processing, first voltage stabilization processing, and filtering processing on the DC voltage input from the input port of the DC power supply, the output voltage stability is improved. Further, a second voltage stabilization unit and a current limiting unit are provided behind the first voltage stabilization unit to perform second voltage stabilization processing and current limiting processing on the output voltage of the filtering unit, which can further improve the stability of the output voltage.

[0032] According to an embodiment of the present invention, there is provided a processing device for a DC drive power supply. Refer to Figure 1 the schematic structural diagram of an embodiment of the device of the present invention shown in. The processing device for the DC drive power supply is used to process the DC power supply of the drive circuit of the device and then supply power to the drive circuit of the device; wherein, the DC power supply is such as the power supply VCCin, and the drive circuit of the device is such as the drive circuit of the motor. In the solution of the present invention, as Figure 1 shown, the processing device for the DC drive power supply includes: a primary protection unit, a first voltage stabilization unit, and a filtering unit. The primary protection unit is such as an electrostatic discharge tube ESD or a transient voltage suppression diode TVS, the first voltage stabilization unit is such as a voltage stabilizing diode Z1, and the filtering unit is such as a filtering circuit composed of an inductor L1, a resistor R1, and a capacitor C1.

[0033] Among them, the primary protection unit is used to perform primary protection processing on the DC voltage provided by the DC power supply and then output it.

[0034] The first voltage stabilization unit is used to perform first voltage stabilization processing on the DC voltage provided by the DC power supply and then output it.

[0035] The filtering unit is used to perform filtering processing on the DC voltage provided by the DC power supply and then output it.

[0036] In the solution of the present invention, by using the primary protection unit to perform primary protection processing, the first voltage stabilization unit to perform first voltage stabilization processing, and the filtering unit to perform filtering processing on the DC voltage input from the input port of the DC power supply, effective protection is achieved and the stability of the output voltage is improved.

[0037] In some embodiments, the first voltage stabilization unit is located behind the primary protection unit; the filtering unit is located behind the first voltage stabilization unit.

[0038] In the solution of the present invention, for the DC voltage input at the input port of the self-DC power supply, the primary protection unit, the first voltage regulation unit, and the filtering unit are used to perform primary protection processing, first voltage regulation processing, and filtering processing in sequence, so as to achieve effective protection and improve the stability of the output voltage.

[0039] In some embodiments, the primary protection unit includes an electrostatic discharge tube or a transient voltage suppression diode.

[0040] Figure 3 It is a schematic structural diagram of an embodiment of the filter voltage regulation circuit. In Figure 3 In the example shown, an electrostatic discharge tube ESD is designed at the input port of the VCCin power supply (i.e., the DC power supply), which can effectively prevent the subsequent-stage devices from being damaged due to static electricity when the motor is connected, and improve the safety and stability of the product. The electrostatic discharge tube ESD can be replaced by a transient voltage suppression diode (TVS tube).

[0041] In some embodiments, the first voltage regulation unit includes a first voltage regulation diode, such as voltage regulation diode Z1.

[0042] In Figure 3 In the example shown, the voltage regulation diode Z1 is placed at the VCCin interface to discharge the voltage, prevent the VO voltage at the output end from being abnormal due to the voltage fluctuation of VCCin, and damage the subsequent-stage circuit devices.

[0043] In the solution of the present invention, even in special cases, when the motor voltage exceeds the limit value of the voltage regulation diode Z1, the voltage regulation diode Z1 is broken down and will not burn out the subsequent-stage circuit, playing a protective role. Thus, the solution of the present invention can protect the subsequent-stage circuit even when the voltage regulation diode Z1 is broken down in special cases, acting as a fuse.

[0044] In some embodiments, the filtering unit includes an LRC filter. The power supply of the motor is usually provided by the main control circuit. The power supply provided by the main control circuit, such as the VCCin power supply (i.e., the DC power supply), can be a switching power supply or an isolated power supply. After the main control circuit outputs the power supply, it is usually affected by various noises, and a stable power supply VO is provided through the voltage regulation circuit. In the solution of the present invention, through the design of the peripheral circuit, the components can be changed according to the actual noise frequency band. In Figure 3 In the example shown, when external noise enters, the high-frequency signals and interference can be filtered out through the filtering circuit composed of the inductor L1, the resistor R1, and the capacitor C1, and an effective stable power supply VO can be provided.

[0045] In some embodiments, the LRC filter includes an inductance module, a first resistor module, and a first capacitor module. The inductance module is, for example, inductance L1, the first resistor module is, for example, resistor R1, and the first capacitor module is, for example, capacitor C1.

[0046] Wherein, the input port of the DC power supply is grounded via the electrostatic discharge tube or the transient voltage suppression diode; the input port of the DC power supply is also connected to the cathode of the first voltage stabilizing diode; the anode of the first voltage stabilizing diode is grounded; the input port of the DC power supply is also grounded via the inductance module and the first resistor module, and the capacitor module is connected in parallel with the first resistor module; the common end of the inductance module and the first resistor module serves as the output end of the filtering unit.

[0047] In Figure 3 In the example shown, after the input port of the VCCin power supply (i.e., the DC power supply), a filtering circuit composed of inductance L1, resistor R1, and capacitor C1 is designed to filter out the high-frequency signals and interference of the VCCin power supply (i.e., the DC power supply).

[0048] In the solution of the present invention, effective protection is achieved through the electrostatic discharge tube ESD or the transient voltage suppression diode TVS, the voltage stabilizing diode Z1, and the filtering circuit composed of inductance L1, resistor R1, and capacitor C1, improving the flexibility of product development.

[0049] In some embodiments, as Figure 2 shown, the processing device of the DC drive power supply according to the solution of the present invention further includes at least one of a display unit, a current limiting unit, and a second voltage stabilizing unit. The display unit is, for example, the drive display circuit U1, the second voltage stabilizing unit is, for example, the second voltage stabilizing diode, and the current limiting unit is, for example, current limiting resistors R2 and R3. Figure 2 FIG. is a schematic structural diagram of another embodiment of the processing device of the DC drive power supply of the present invention.

[0050] Wherein, the display unit is used to detect the DC voltage output from at least one of the primary protection unit, the first voltage stabilizing unit, and the filtering unit, and initiate a prompt message when the detected voltage exceeds the set voltage range. In Figure 3 In the example shown, the drive display circuit U1 is used to detect whether a stable power supply voltage will be output after the abnormal voltage of VCCin passes through the electrostatic discharge tube ESD and the voltage stabilizing diode Z1. This circuit is a module circuit.

[0051] The second voltage stabilizing unit is used to perform a second voltage stabilizing process on the DC voltage output from at least one of the primary protection unit, the first voltage stabilizing unit, and the filtering unit and then output it.

[0052] The current limiting unit is configured to perform current limiting processing on the DC voltage output from at least one of the primary protection unit, the first voltage stabilizing unit, and the filtering unit and then output it.

[0053] In the solution of the present invention, through the display unit, the DC voltage output from at least one of the primary protection unit, the first voltage stabilizing unit, and the filtering unit is detected and displayed, facilitating the user to understand the power supply situation of the DC power supply at any time. Through the second voltage stabilizing unit for the second voltage stabilizing process and the current limiting unit for current limiting processing, the stability and safety of the output voltage can be further improved.

[0054] In some embodiments, the display unit is located at the output end of the filtering unit; the second voltage stabilizing unit is located at the output end of the filtering unit; the current limiting unit is located behind the second voltage stabilizing unit.

[0055] In the solution of the present invention, through the second voltage stabilizing unit and the current limiting unit for the second voltage stabilizing process and current limiting processing in sequence, the stability and safety of the output voltage can be further improved.

[0056] In some embodiments, the second voltage stabilizing unit includes: a second voltage stabilizing diode, such as voltage stabilizing diode Z2.

[0057] In the solution of the present invention, compared with a single voltage stabilizing diode voltage stabilizing circuit, by using two voltage stabilizing diodes, namely voltage stabilizing diode Z1 and voltage stabilizing diode Z2, the adjustment range of the load current is increased.

[0058] In some embodiments, the current limiting unit includes: a first current limiting module and a second current limiting module. The first current limiting module is, for example, resistor R2, and the second current limiting module is, for example, resistor R3; the first current limiting module and the second current limiting module are arranged in parallel.

[0059] In Figure 3 In the example shown, by designing voltage stabilizing diode Z2, and resistors R2 and R3, a stable voltage is output at VO at the output end to provide to the subsequent circuit.

[0060] In the solution of the present invention, when the voltage exceeds the voltage stabilizing value, by replacing voltage stabilizing diode Z2 to adjust the voltage stabilizing value of voltage stabilizing diode Z2, the circuit where voltage stabilizing diode Z2 is located can adjust the output voltage, enabling the motor voltage to remain stable, improving the stability during the use of the motor, and being able to increase the adjustment range of the load current.

[0061] In some embodiments, the output terminal of the filtering unit is connected to the cathode of the second voltage stabilizing diode; the anode of the second voltage stabilizing diode is grounded; the output terminal of the filtering unit is also connected to the power supply terminal of the driving circuit of the device after passing through the current limiting unit.

[0062] Figure 3 In the figure, VCCin is the power supply, R1, R2, and R3 are resistors, RL is the load resistor, C1 is the filtering capacitor, ESD (Electro-Static discharge) is the electrostatic discharge tube, Z1 and Z2 are voltage stabilizing diodes, and L1 is an inductor (a magnetic bead can be used).

[0063] Among them, the VCCin interface is grounded through the electrostatic discharge tube ESD; the VCCin interface is also connected to the cathode of the voltage stabilizing diode Z1, and the anode of the voltage stabilizing diode Z1 is grounded; the VCCin interface is also connected to the first connection end of the inductor L1; the second connection end of the inductor L1 is grounded after passing through the parallel-connected resistor R1 and capacitor C1. The second connection end of the inductor L1 is also connected to the cathode of the voltage stabilizing diode Z2; the anode of the voltage stabilizing diode Z2 is grounded. The second connection end of the inductor L1 is also connected to the output terminal VO after passing through the parallel-connected resistor R2 and resistor R3; the output terminal VO is grounded through the load electronic RL. The output terminal VO supplies power to the subsequent circuit. The subsequent circuit is, for example, an Intelligent Power Module (IPM) module and other chips in a motor drive circuit.

[0064] Figure 3 The specific working principle of the shown filtering and voltage stabilizing circuit is described as follows:

[0065] First, consider the functions of each device when the circuit is abnormal: When VCCin is connected to the circuit, there will be static electricity. The static electricity can be connected to the ground through the electrostatic discharge tube ESD to avoid damage to the devices. At the same time, when the VCCin power supply is subjected to a short-term surge voltage impact or voltage fluctuation, after the reverse voltage exceeds the voltage of the voltage stabilizing diode Z1, the voltage stabilizing diode Z1 starts to act in reverse to discharge the voltage to the ground, so that the subsequent circuit obtains a relatively stable power supply relative to VCCin.

[0066] The power supply flows into the driving display circuit U1 and the voltage stabilizing circuit composed of the voltage stabilizing diode Z2, resistor R2, and resistor R3 after passing through the filtering circuit composed of the inductor L1, resistor R1, and capacitor C1, and outputs a stable power supply VO. The resistors R2 and R3 play a current limiting role in the circuit to prevent the voltage stabilizing diode Z2 from being burned out due to excessive current and output a stable power supply VO.

[0067] The voltage-stabilizing diode Z2 can be selected with appropriate power and current according to the actual power supply VO. When the output voltage requirement is 15V, the voltage-stabilizing value of the voltage-stabilizing diode Z2 can be selected to be around 15V. Resistors R2 and R3 are current-limiting resistors to protect the voltage-stabilizing diode Z2, and their resistance values can be adjusted appropriately according to actual conditions. RL is a pseudo load resistor that simulates the current required by the subsequent circuit.

[0068] Among them, when the voltage of the VCCin circuit is stable, the voltage regulator diode Z1 does not work in the circuit, and the power is directly input to the subsequent circuit through the filter circuit composed of the inductor L1, the resistor R1 and the capacitor C1. When the input voltage exceeds the voltage of the voltage regulator diode Z2, the voltage regulator diode Z2 stabilizes the voltage to within the voltage regulation value of the voltage regulator diode Z2.

[0069] Inductor L1, capacitor C1 and resistor R1 form a filter circuit, and a more stable and smooth voltage is obtained after passing through the filter circuit; resistor R2 and resistor R3 are current limiting resistors, which protect the voltage regulator diode Z2 from breakdown and failure due to reverse voltage.

[0070] Figure 5 It is a structural schematic diagram of an embodiment of a motor interface circuit. Figure 5 In, 5 interfaces are used to receive different signals. Generally, a DC motor will have five ports: VDC port (i.e. DC voltage port), GND port (i.e. ground wire or common port), VCC port (i.e. working voltage port), VSP port (i.e. speed control port) and FG port (i.e. feedback output port). Among them, the VDC port is used to provide power to the DC motor IPM, and the VCC port is generally used to provide logic power to the IPM and voltage conversion in the circuit; the VSP port is the speed regulation voltage range, and the motor receives this interface voltage signal to increase or decrease the speed; the FG port is the real-time feedback of the motor speed after the motor receives the VSP command voltage. The VCC port is the VCCin in the present invention, and the other ports are not related to VCCin.

[0071] The scheme of the present invention optimizes the VCCin voltage stabilization circuit of the DC motor, performs passive filtering through inductance and capacitance, and supplies the stabilized voltage to the output port after filtering noise through the filter circuit and current limiting resistor protection circuit, thereby increasing the load current regulation range, and playing a filtering role while ensuring the voltage stabilization effect. On the one hand, it solves the problem of unstable power output in motor control, and on the other hand, it can protect the circuit and play a voltage stabilization effect. The filter voltage stabilization circuit of the VCCin power supply of the motor drive circuit proposed in the scheme of the present invention has high reliability, good voltage stabilization effect, and more convenient and simple later maintenance.

[0072] Adopting the technical solution of the present invention, for a DC power supply used to supply power to a drive circuit (such as a motor drive circuit), a primary protection unit (such as an electrostatic discharge tube ESD or a transient voltage suppression diode TVS), a first voltage stabilization unit (such as a voltage stabilizing diode Z1), and a filtering unit (such as a filtering circuit composed of an inductor L1, a resistor R1, and a capacitor C1) are provided at the input port of the DC power supply. The primary protection unit is used to perform primary protection processing on the DC voltage input from the input port of the DC power supply; the first voltage stabilization unit is used to perform the first voltage stabilization processing on the DC voltage after the primary protection processing; the filtering unit is used to perform filtering processing on the DC voltage after the first voltage stabilization processing and then output it. Thus, by performing primary protection processing, the first voltage stabilization processing, and filtering processing on the DC voltage input from the input port of the DC power supply, the stability of the output voltage is improved.

[0073] Furthermore, by providing a second voltage stabilization unit and a current limiting unit behind the first voltage stabilization unit, the second voltage stabilization unit is used to perform the second voltage stabilization processing on the output voltage of the filtering unit; the current limiting unit is used to perform current limiting processing on the DC voltage after the second voltage stabilization unit processes it, so as to better adjust the DC voltage input from the input port of the DC power supply to the voltage range required by the drive circuit. Thus, by performing the second voltage stabilization processing and current limiting processing on the output voltage of the filtering unit, the stability of the output voltage can be further improved.

[0074] According to an embodiment of the present invention, a motor drive circuit corresponding to the processing device of the DC drive power supply is also provided. The motor drive circuit may include: the processing device of the DC drive power supply described above.

[0075] Specifically, as Figure 1 shown, the processing device of the DC drive power supply includes: a primary protection unit, a first voltage stabilization unit, and a filtering unit. The primary protection unit is such as an electrostatic discharge tube ESD or a transient voltage suppression diode TVS, the first voltage stabilization unit is such as a voltage stabilizing diode Z1, and the filtering unit is such as a filtering circuit composed of an inductor L1, a resistor R1, and a capacitor C1.

[0076] Among them, the primary protection unit is used to perform primary protection processing on the DC voltage provided by the DC power supply and then output it.

[0077] The first voltage stabilization unit is used to perform the first voltage stabilization processing on the DC voltage provided by the DC power supply and then output it.

[0078] The filtering unit is used to perform filtering processing on the DC voltage provided by the DC power supply and then output it.

[0079] In the solution of the present invention, for the DC voltage input at the input port of the self-DC power supply, the primary protection unit is used for primary protection processing, the first voltage stabilization unit is used for the first voltage stabilization processing, and the filtering unit is used for filtering processing to achieve effective protection and improve the stability of the output voltage.

[0080] In some embodiments, the first voltage stabilization unit is located behind the primary protection unit; the filtering unit is located behind the first voltage stabilization unit.

[0081] In the solution of the present invention, for the DC voltage input at the input port of the self-DC power supply, the primary protection unit, the first voltage stabilization unit, and the filtering unit are used in sequence for primary protection processing, the first voltage stabilization processing, and filtering processing to achieve effective protection and improve the stability of the output voltage.

[0082] In some embodiments, the primary protection unit includes: an electrostatic discharge tube or a transient voltage suppression diode.

[0083] In Figure 3 In the example shown, an electrostatic discharge tube ESD is designed at the input port of the VCCin power supply (i.e., the DC power supply), which can effectively prevent the subsequent-stage devices from being damaged due to static electricity when the motor is connected, and improve the safety and stability of the product. The electrostatic discharge tube ESD can be replaced by a transient voltage suppressor (TVS tube).

[0084] In some embodiments, the first voltage stabilization unit includes: a first voltage stabilization diode, such as voltage stabilization diode Z1.

[0085] In Figure 3 In the example shown, the voltage stabilization diode Z1 is placed at the VCCin interface to discharge the voltage, prevent the VO voltage at the output end from being abnormal due to the voltage fluctuation of VCCin, and damage the subsequent-stage circuit devices.

[0086] In the solution of the present invention, even in special cases, if the motor voltage exceeds the limit value of the voltage stabilization diode Z1, the voltage stabilization diode Z1 is broken down and will not burn out the subsequent-stage circuit, playing a protective role. Thus, the solution of the present invention can protect the subsequent-stage circuit even when the voltage stabilization diode Z1 is broken down in special cases, playing the role of a fuse.

[0087] In some embodiments, the filtering unit includes an LRC filter. The power supply of the motor is usually provided by the main control circuit. The power supply provided by the main control circuit, such as the VCCin power supply (i.e., the DC power supply), can be a switching power supply or an isolated power supply. After the main control circuit outputs the power supply, it is usually affected by various noises, and a stable power supply VO is provided through a voltage stabilizing circuit. In the solution of the present invention, through the design of the peripheral circuit, various components can be changed according to the actual noise frequency band. In Figure 3 In the shown example, when external noise enters, the high-frequency signals and interference can be filtered out through the filtering circuit composed of the inductor L1, resistor R1, and capacitor C1, and an effective stable power supply VO can be provided.

[0088] In some embodiments, the LRC filter includes an inductor module, a first resistor module, and a first capacitor module. The inductor module is, for example, the inductor L1, the first resistor module is, for example, the resistor R1, and the first capacitor module is, for example, the capacitor C1.

[0089] Among them, the input port of the DC power supply is grounded through the electrostatic discharge tube or the transient voltage suppression diode; the input port of the DC power supply is also connected to the cathode of the first voltage stabilizing diode; the anode of the first voltage stabilizing diode is grounded; the input port of the DC power supply is also grounded through the inductor module and the first resistor module, and the capacitor module is connected in parallel with the first resistor module; the common end of the inductor module and the first resistor module serves as the output end of the filtering unit.

[0090] In Figure 3 In the shown example, after the input port of the VCCin power supply (i.e., the DC power supply), a filtering circuit composed of the inductor L1, resistor R1, and capacitor C1 is designed to filter out the high-frequency signals and interference of the VCCin power supply (i.e., the DC power supply).

[0091] In the solution of the present invention, through the filtering circuit composed of the electrostatic discharge tube ESD or the transient voltage suppression diode TVS, the voltage stabilizing diode Z1, and the inductor L1, resistor R1, and capacitor C1, effective protection is achieved, and the flexibility of product development is improved.

[0092] In some embodiments, as Figure 2 shown, the processing device of the DC drive power supply according to the solution of the present invention further includes at least one of a display unit, a current limiting unit, and a second voltage stabilizing unit. The display unit is, for example, the drive display circuit U1, the second voltage stabilizing unit is, for example, the second voltage stabilizing diode, and the current limiting unit is, for example, the current limiting resistors R2 and R3. Figure 2 FIG. [ID] is a schematic structural diagram of another embodiment of the processing device of the DC drive power supply of the present invention.

[0093] Among them, the display unit is configured to detect the DC voltage output from at least one of the primary protection unit, the first voltage stabilizing unit, and the filtering unit, and initiate a prompt message when the detected voltage exceeds the set voltage range. In Figure 3 In the example shown, the driving display circuit U1 is configured to detect whether a stable power supply voltage will be output after the abnormal voltage of VCCin passes through the electrostatic discharge tube ESD and the voltage stabilizing diode Z1. This circuit is a module circuit.

[0094] The second voltage stabilizing unit is configured to perform a second voltage stabilizing process on the DC voltage output from at least one of the primary protection unit, the first voltage stabilizing unit, and the filtering unit and then output it.

[0095] The current limiting unit is configured to perform a current limiting process on the DC voltage output from at least one of the primary protection unit, the first voltage stabilizing unit, and the filtering unit and then output it.

[0096] In the solution of the present invention, through the display unit, the DC voltage output from at least one of the primary protection unit, the first voltage stabilizing unit, and the filtering unit is detected and displayed, facilitating the user to understand the power supply situation of the DC power supply at any time. Through the second voltage stabilizing unit for the second voltage stabilizing process and the current limiting unit for the current limiting process, the stability and safety of the output voltage can be further improved.

[0097] In some embodiments, the display unit is located at the output end of the filtering unit; the second voltage stabilizing unit is located at the output end of the filtering unit; the current limiting unit is located behind the second voltage stabilizing unit.

[0098] In the solution of the present invention, through the second voltage stabilizing unit and the current limiting unit to perform the second voltage stabilizing process and the current limiting process in sequence, the stability and safety of the output voltage can be further improved.

[0099] In some embodiments, the second voltage stabilizing unit includes: a second voltage stabilizing diode, such as the voltage stabilizing diode Z2.

[0100] In the solution of the present invention, compared with the single voltage stabilizing diode voltage stabilizing circuit, the use of two voltage stabilizing diodes, namely the voltage stabilizing diode Z1 and the voltage stabilizing diode Z2, improves the adjustment range of the load current.

[0101] In some embodiments, the current limiting unit includes: a first current limiting module and a second current limiting module. The first current limiting module is such as the resistor R2, and the second current limiting module is such as the resistor R3; the first current limiting module and the second current limiting module are arranged in parallel.

[0102] In Figure 3In the shown example, by designing the voltage stabilizing diode Z2, as well as the resistors R2 and R3, a stable voltage is output at the output terminal VO and provided to the subsequent stage circuit.

[0103] In the solution of the present invention, when the voltage exceeds the regulated value, the voltage stabilizing diode Z2 is replaced to adjust the regulated value of the voltage stabilizing diode Z2, so that the circuit where the voltage stabilizing diode Z2 is located can regulate the output voltage, keep the motor voltage stable, improve the stability during the use of the motor, and can increase the adjustment range of the load current.

[0104] In some embodiments, the output terminal of the filtering unit is connected to the cathode of the second voltage stabilizing diode; the anode of the second voltage stabilizing diode is grounded; the output terminal of the filtering unit is also connected to the power supply terminal of the driving circuit of the device after passing through the current limiting unit.

[0105] In Figure 3 In the shown example, the VCCin interface is grounded through the electrostatic discharge tube ESD; the VCCin interface is also connected to the cathode of the voltage stabilizing diode Z1, and the anode of the voltage stabilizing diode Z1 is grounded; the VCCin interface is also connected to the first connection end of the inductor L1; the second connection end of the inductor L1 is grounded after passing through the parallel-connected resistor R1 and capacitor C1. The second connection end of the inductor L1 is also connected to the cathode of the voltage stabilizing diode Z2; the anode of the voltage stabilizing diode Z2 is grounded. The second connection end of the inductor L1 is also connected to the output terminal VO after passing through the parallel-connected resistors R2 and R3; the output terminal VO is grounded through the load resistor RL. The output terminal VO supplies power to the subsequent stage circuit. The subsequent stage circuit is, for example, the Intelligent Power Module (IPM) module and other chips in the motor drive circuit.

[0106] Figure 3The specific working principle of the filter voltage regulator circuit shown is described as follows: First, consider the role of each device when the circuit is abnormal: When VCCin is connected to the circuit, static electricity will exist. Static electricity can be connected to the ground through the electrostatic discharge tube ESD to avoid static electricity damage to the device. At the same time, when the VCCin power supply is subjected to a short-term surge voltage impact or voltage fluctuation, after the reverse voltage exceeds the voltage of the voltage regulator diode Z1, the voltage regulator diode Z1 starts to reversely act to discharge the voltage to the ground, so that the subsequent circuit can obtain a relatively stable power supply relative to VCCin. After passing through the filter circuit composed of inductor L1, resistor R1 and capacitor C1, the power supply flows into the drive display circuit U1 and the voltage regulator circuit composed of voltage regulator diode Z2, resistor R2 and resistor R3, and outputs a stable power supply VO. Resistors R2 and R3 play a current limiting role in the circuit, preventing the voltage regulator diode Z2 from being burned due to excessive current, and outputting a stable power supply VO. The voltage regulator diode Z2 can select a tube with appropriate power and current according to the actual needs of the power supply VO. When the output voltage requirement is 15V, the voltage regulator diode Z2 can be selected to have a voltage regulator value of about 15V. Resistors R2 and R3 are current limiting resistors to protect the voltage regulator diode Z2, and their resistance values can be adjusted appropriately according to actual conditions. RL is a pseudo load resistor to simulate the current required by the subsequent circuit.

[0107] Among them, when the voltage of the VCCin circuit is stable, the voltage zener diode Z1 does not work in the circuit, and the power is directly input to the subsequent circuit through the filter circuit composed of the inductor L1, the resistor R1 and the capacitor C1. When the input voltage exceeds the voltage of the voltage zener diode Z2, the voltage zener diode Z2 stabilizes the voltage to within the voltage stabilization value of the voltage zener diode Z2. The inductor L1, the capacitor C1 and the resistor R1 are the filter circuit, and a more stable and smooth voltage is obtained after the filter circuit; the resistor R2 and the resistor R3 are current limiting resistors, which protect the voltage zener diode Z2 from breakdown and failure due to reverse voltage.

[0108] The scheme of the present invention optimizes the VCCin voltage stabilization circuit of the DC motor, performs passive filtering through inductors and capacitors, and supplies the stabilized voltage to the output port for use after the noise is filtered out by the filter circuit and the current limiting resistor protection circuit, thereby increasing the adjustment range of the load current and playing a filtering role while ensuring the voltage stabilization effect. On the one hand, it solves the problem of unstable power output in motor control, and on the other hand, it can protect the circuit and play a voltage stabilization effect.

[0109] Since the processing and functions implemented by the motor drive circuit of this embodiment basically correspond to the embodiments, principles and examples of the device, for the details not described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0110] According to an embodiment of the present invention, there is also provided a motor corresponding to a processing device of a DC drive power supply. The motor drive circuit and the motor may include: the processing device of the DC drive power supply described above, or the motor drive circuit described above.

[0111] Specifically, as Figure 1 shown, the processing device of the DC drive power supply includes: a primary protection unit, a first voltage stabilization unit, and a filtering unit. The primary protection unit is composed of an electrostatic discharge tube ESD or a transient voltage suppression diode TVS, the first voltage stabilization unit is a voltage stabilization diode Z1, and the filtering unit is a filtering circuit composed of an inductor L1, a resistor R1, and a capacitor C1.

[0112] Among them, the primary protection unit is used to perform primary protection processing on the DC voltage provided by the DC power supply and then output it.

[0113] The first voltage stabilization unit is used to perform the first voltage stabilization processing on the DC voltage provided by the DC power supply and then output it.

[0114] The filtering unit is used to perform filtering processing on the DC voltage provided by the DC power supply and then output it.

[0115] In the solution of the present invention, by using the primary protection unit to perform primary protection processing, the first voltage stabilization unit to perform the first voltage stabilization processing, and the filtering unit to perform filtering processing on the DC voltage input from the input port of the DC power supply, effective protection is achieved, and the stability of the output voltage is improved.

[0116] In some embodiments, the first voltage stabilization unit is located behind the primary protection unit; the filtering unit is located behind the first voltage stabilization unit.

[0117] In the solution of the present invention, by using the primary protection unit, the first voltage stabilization unit, and the filtering unit to perform primary protection processing, the first voltage stabilization processing, and filtering processing on the DC voltage input from the input port of the DC power supply in sequence, effective protection is achieved, and the stability of the output voltage is improved.

[0118] In some embodiments, the primary protection unit includes: an electrostatic discharge tube or a transient voltage suppression diode.

[0119] In Figure 3In the example shown, an electrostatic discharge tube (ESD) is designed at the input port of the VCCin power supply (i.e., the DC power supply), which can effectively prevent the subsequent-stage devices from being damaged due to static electricity when the motor is connected, improving the safety and stability of the product. The electrostatic discharge tube (ESD) can be replaced by a transient voltage suppressor (TVS tube).

[0120] In some embodiments, the first voltage regulation unit includes: a first voltage regulation diode, such as voltage regulation diode Z1.

[0121] In Figure 3 In the example shown, the voltage regulation diode Z1 is placed at the VCCin interface to discharge the voltage, preventing the abnormal voltage of VO at the output end caused by the voltage fluctuation of VCCin and damaging the subsequent-stage circuit devices.

[0122] In the solution of the present invention, even in special cases, when the motor voltage exceeds the limit value of the voltage regulation diode Z1, the voltage regulation diode Z1 is broken down and will not burn out the subsequent-stage circuit, playing a protective role. Thus, the solution of the present invention can protect the subsequent-stage circuit even when the voltage regulation diode Z1 is broken down in special cases, acting as a fuse.

[0123] In some embodiments, the filtering unit includes: an LRC filter. The power supply of the motor is usually provided by the main control circuit. The power supply provided by the main control circuit, such as the VCCin power supply (i.e., the DC power supply), can be a switching power supply or an isolated power supply. After the main control circuit outputs the power supply, it is usually affected by various noises, and a stable power supply VO is provided through the voltage regulation circuit. In the solution of the present invention, through the design of the peripheral circuit, the components can be changed according to the actual noise frequency band. In Figure 3 In the example shown, when external noises enter, the high-frequency signals and interferences can be filtered out through the filtering circuit composed of the inductor L1, the resistor R1, and the capacitor C1, and an effective stable power supply VO can be provided.

[0124] In some embodiments, the LRC filter includes: an inductor module, a first resistor module, and a first capacitor module. The inductor module is such as the inductor L1, the first resistor module is such as the resistor R1, and the first capacitor module is such as the capacitor C1.

[0125] Among them, the input port of the DC power supply is grounded via the electrostatic discharge tube or the transient voltage suppression diode; the input port of the DC power supply is also connected to the cathode of the first voltage regulator diode; the anode of the first voltage regulator diode is grounded; the input port of the DC power supply is also grounded via the inductor module and the first resistor module, and the capacitor module is connected in parallel with the first resistor module; the common terminal of the inductor module and the first resistor module serves as the output terminal of the filtering unit.

[0126] In Figure 3 In the example shown, after the input port of the VCCin power supply (i.e., the DC power supply), a filtering circuit composed of an inductor L1, a resistor R1, and a capacitor C1 is designed to filter out high-frequency signals and interference of the VCCin power supply (i.e., the DC power supply).

[0127] In the solution of the present invention, through the filtering circuit composed of the electrostatic discharge tube ESD or the transient voltage suppression diode TVS, the voltage regulator diode Z1, and the inductor L1, the resistor R1, and the capacitor C1, effective protection is achieved, and the flexibility of product development is improved.

[0128] In some embodiments, such as Figure 2 shown, the processing device of the DC drive power supply according to the solution of the present invention further includes at least one of a display unit, a current limiting unit, and a second voltage regulating unit. The display unit is, for example, a drive display circuit U1, the second voltage regulating unit is, for example, a second voltage regulator diode, and the current limiting unit is, for example, current limiting resistors R2 and R3. Figure 2 It is a schematic structural diagram of another embodiment of the processing device of the DC drive power supply of the present invention.

[0129] Among them, the display unit is used to detect the DC voltage output from at least one of the primary protection unit, the first voltage regulating unit, and the filtering unit, and initiate a prompt message when the detected voltage exceeds the set voltage range. In Figure 3 In the example shown, the drive display circuit U1 is used to detect whether a stable power supply voltage will be output after the abnormal voltage of VCCin passes through the electrostatic discharge tube ESD and the voltage regulator diode Z1. This circuit is a module circuit.

[0130] The second voltage regulating unit is used to perform a second voltage regulation process on the DC voltage output from at least one of the primary protection unit, the first voltage regulating unit, and the filtering unit and then output it.

[0131] The current limiting unit is used to perform a current limiting process on the DC voltage output from at least one of the primary protection unit, the first voltage regulating unit, and the filtering unit and then output it.

[0132] In the solution of the present invention, through the display unit, the DC voltage output from at least one of the primary protection unit, the first voltage stabilizing unit, and the filtering unit is detected and displayed, facilitating the user to understand the power supply situation of the DC power supply at any time. Through the second voltage stabilizing unit for secondary voltage stabilizing processing and the current limiting unit for current limiting processing, the stability and safety of the output voltage can be further improved.

[0133] In some embodiments, the display unit is located at the output end of the filtering unit; the second voltage stabilizing unit is located at the output end of the filtering unit; the current limiting unit is located behind the second voltage stabilizing unit.

[0134] In the solution of the present invention, through the second voltage stabilizing unit and the current limiting unit for secondary voltage stabilizing processing and current limiting processing in sequence, the stability and safety of the output voltage can be further improved.

[0135] In some embodiments, the second voltage stabilizing unit includes: a second voltage stabilizing diode, such as voltage stabilizing diode Z2.

[0136] In the solution of the present invention, compared with a single voltage stabilizing diode voltage stabilizing circuit, using a double voltage stabilizing diode, namely voltage stabilizing diode Z1 and voltage stabilizing diode Z2, improves the adjustment range of the load current.

[0137] In some embodiments, the current limiting unit includes: a first current limiting module and a second current limiting module. The first current limiting module is such as resistor R2, and the second current limiting module is such as resistor R3; the first current limiting module and the second current limiting module are arranged in parallel.

[0138] In Figure 3 In the example shown, by designing voltage stabilizing diode Z2, and resistors R2 and R3, a stable voltage is output at VO at the output end to provide to the subsequent circuit.

[0139] In the solution of the present invention, when the voltage exceeds the voltage stabilizing value, by replacing voltage stabilizing diode Z2 to adjust the voltage stabilizing value of voltage stabilizing diode Z2, the circuit where voltage stabilizing diode Z2 is located can adjust the output voltage, keeping the motor voltage stable, improving the stability during the use of the motor, and being able to improve the adjustment range of the load current.

[0140] In some embodiments, the output end of the filtering unit is connected to the cathode of the second voltage stabilizing diode; the anode of the second voltage stabilizing diode is grounded; the output end of the filtering unit is also connected to the power supply end of the driving circuit of the device after passing through the current limiting unit.

[0141] In Figure 3In the example shown, the VCCin interface is grounded after passing through the electrostatic discharge tube ESD; the VCCin interface is also connected to the cathode of the voltage-stabilizing diode Z1, and the anode of the voltage-stabilizing diode Z1 is grounded; the VCCin interface is also connected to the first connection end of the inductor L1; the second connection end of the inductor L1 is grounded after passing through the parallel resistor R1 and the capacitor C1. The second connection end of the inductor L1 is also connected to the cathode of the voltage-stabilizing diode Z2; the anode of the voltage-stabilizing diode Z2 is grounded. The second connection end of the inductor L1 is also connected to the output terminal VO after passing through the parallel resistor R2 and the resistor R3; the output terminal VO is grounded after passing through the load electronic RL. The output terminal VO supplies power to the subsequent circuit. The subsequent circuit is such as the intelligent power module (IPM) module and other chips in the motor drive circuit.

[0142] Figure 3 The specific working principle of the filter voltage regulator circuit shown is described as follows: First, consider the role of each device when the circuit is abnormal: When VCCin is connected to the circuit, static electricity will exist. Static electricity can be connected to the ground through the electrostatic discharge tube ESD to avoid static electricity damage to the device. At the same time, when the VCCin power supply is subjected to a short-term surge voltage impact or voltage fluctuation, after the reverse voltage exceeds the voltage of the voltage regulator diode Z1, the voltage regulator diode Z1 starts to reversely act to discharge the voltage to the ground, so that the subsequent circuit can obtain a relatively stable power supply relative to VCCin. After passing through the filter circuit composed of inductor L1, resistor R1 and capacitor C1, the power supply flows into the drive display circuit U1 and the voltage regulator circuit composed of voltage regulator diode Z2, resistor R2 and resistor R3, and outputs a stable power supply VO. Resistors R2 and R3 play a current limiting role in the circuit, preventing the voltage regulator diode Z2 from being burned due to excessive current, and outputting a stable power supply VO. The voltage regulator diode Z2 can select a tube with appropriate power and current according to the actual needs of the power supply VO. When the output voltage requirement is 15V, the voltage regulator diode Z2 can be selected to have a voltage regulator value of about 15V. Resistors R2 and R3 are current limiting resistors to protect the voltage regulator diode Z2, and their resistance values can be adjusted appropriately according to actual conditions. RL is a pseudo load resistor to simulate the current required by the subsequent circuit.

[0143] Among them, when the voltage of the VCCin circuit is stable, the voltage zener diode Z1 does not work in the circuit, and the power is directly input to the subsequent circuit through the filter circuit composed of the inductor L1, the resistor R1 and the capacitor C1. When the input voltage exceeds the voltage of the voltage zener diode Z2, the voltage zener diode Z2 stabilizes the voltage to within the voltage stabilization value of the voltage zener diode Z2. The inductor L1, the capacitor C1 and the resistor R1 are the filter circuit, and a more stable and smooth voltage is obtained after the filter circuit; the resistor R2 and the resistor R3 are current limiting resistors, which protect the voltage zener diode Z2 from breakdown and failure due to reverse voltage.

[0144] The solution of the present invention optimizes the VCCin voltage stabilization circuit of a DC motor. Through passive filtering with an inductor and a capacitor, the stabilized voltage is filtered by a filter circuit to remove noise and then supplied to the output port through a current-limiting resistor protection circuit, improving the adjustment range of the load current. While ensuring the voltage stabilization effect, it can also play a filtering role. On the one hand, it solves the problem of unstable power supply output in motor control, and on the other hand, it can protect the circuit and achieve the voltage stabilization effect.

[0145] Since the processing and functions implemented by the motor in this embodiment are basically corresponding to the embodiments, principles, and examples of the device, for the details not described in the description of this embodiment, reference can be made to the relevant descriptions in the foregoing embodiments and will not be elaborated here.

[0146] In summary, it is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned advantageous ways can be freely combined and superimposed.

[0147] The above are only the embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A processing device for a DC drive power supply, characterized in that, After processing the DC power supply for the driving circuit of the device, it supplies power to the driving circuit of the device; The processing device for the DC driving power supply includes: a primary protection unit, a first voltage stabilizing unit, and a filtering unit; wherein, The primary protection unit is configured to perform primary protection processing on the DC voltage provided by the DC power supply and then output it; The first voltage stabilizing unit is configured to perform first voltage stabilizing processing on the DC voltage provided by the DC power supply and then output it; The filtering unit is configured to perform filtering processing on the DC voltage provided by the DC power supply and then output it.

2. The processing device of the DC drive power supply according to claim 1, characterized in that The first voltage stabilizing unit is located behind the primary protection unit; the filtering unit is located behind the first voltage stabilizing unit.

3. The processing device of the DC drive power supply according to claim 1, characterized in that Wherein, The primary protection unit includes: an electrostatic discharge tube or a transient voltage suppression diode; And / or, The first voltage stabilizing unit includes: a first voltage stabilizing diode; And / or, The filtering unit includes: an LRC filter.

4. The processing device of the DC drive power supply according to claim 3, characterized in that, The LRC filter includes: an inductor module, a first resistor module, and a first capacitor module; wherein, The input port of the DC power supply is grounded through the electrostatic discharge tube or the transient voltage suppression diode; The input port of the DC power supply is also connected to the cathode of the first voltage stabilizing diode; the anode of the first voltage stabilizing diode is grounded; The input port of the DC power supply is also grounded through the inductor module and the first resistor module, and the capacitor module is connected in parallel with the first resistor module; the common end of the inductor module and the first resistor module serves as the output end of the filtering unit.

5. The processing device of the DC drive power supply according to any one of claims 1 to 4, characterized in that, It further includes: At least one of a display unit, a current limiting unit, and a second voltage stabilizing unit; wherein, The display unit is configured to detect the DC voltage output from at least one of the primary protection unit, the first voltage stabilizing unit, and the filtering unit, and initiate a prompt message when the detected voltage exceeds the set voltage range; The second voltage stabilizing unit is configured to perform second voltage stabilizing processing on the DC voltage output from at least one of the primary protection unit, the first voltage stabilizing unit, and the filtering unit and then output it; The current limiting unit is configured to perform current limiting processing on the DC voltage output from at least one of the primary protection unit, the first voltage stabilizing unit, and the filtering unit and then output it.

6. The processing device of the DC drive power supply according to claim 5, wherein, The display unit is located at the output end of the filtering unit; the second voltage stabilizing unit is located at the output end of the filtering unit; the current limiting unit is located behind the second voltage stabilizing unit.

7. The processing device of the DC drive power supply according to claim 5, characterized in that, Wherein, The second voltage stabilizing unit includes: a second voltage stabilizing diode; And / or, The current limiting unit includes: a first current limiting module and a second current limiting module; the first current limiting module and the second current limiting module are arranged in parallel.

8. The processing device of the DC drive power supply according to claim 7, characterized in that, The output end of the filtering unit is connected to the cathode of the second voltage stabilizing diode; the anode of the second voltage stabilizing diode is grounded; the output end of the filtering unit is also connected to the power supply end of the driving circuit of the device after passing through the current limiting unit.

9. A motor drive circuit, characterized in that, It includes: The processing device for the DC driving power supply according to any one of claims 1 to 8.

10. A motor, characterized in that, It includes: The processing device of the DC drive power supply according to any one of claims 1 to 8, or the motor drive circuit according to claim 9.

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