Fly capacitor new return path step-up / down y-type motor driver
Patent Information
- Application Number
- CN202522154755.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-12
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-10-12
AI Technical Summary
[0004]本实用新型的目的是提供一种飞跨电容新返回路径降压升压y型电机驱动器，以解决传统驱动电压调节范围窄、能量返回路径损耗大及飞跨电容协同性不足的问题
[0011]本实用新型一种飞跨电容新返回路径降压升压y型电机驱动器的优点在于：首先，在逆变驱动核心部分，应用了相较传统逆变驱动不同的飞跨电容组配置，通过多电容串联分压与辅助稳压，构建多级电压平台；其次，在能量传输与调节部分，又增加了新返回路径模块，并与Buck降压模块、Boost升压模块形成协同设计，使得本实用新型所述驱动能够实现低损耗的宽电压范围输出与高效能量回馈。本实用新型一种飞跨电容新返回路径降压升压y型电机驱动器相较于传统单一拓扑的电机驱动器，有着更宽范围的输出电压适配能力，能量转换损耗更低，电机运行时的输出波形纹波更小，同时能量回馈更高效，整体驱动系统更加安全、稳定、实用。
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Figure CN224843589U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of inverter and motor drive technology, specifically to a flyover capacitor new return path buck-boost Y-type motor driver. Background Technology
[0002] In fields such as industrial automation and new energy vehicles, three-phase Y-type motors are widely used due to their high efficiency and reliability. The performance of their drive system is crucial to the overall energy efficiency and stability of the equipment. Traditional motor drive topologies have significant limitations: a single Buck circuit can only achieve step-down, and a single Boost circuit can only achieve step-up, making it difficult to adapt to a wide range of scenarios where voltage fluctuates with charge or load changes when powered by battery. While conventional flying capacitor multilevel inverters can optimize the output waveform through capacitor voltage division, their unreasonable energy return path design easily generates circulating current, leading to increased losses in switching devices. Furthermore, the stability of intermediate voltage nodes is poor, and voltage distortion easily occurs during dynamic motor operation, affecting drive accuracy. Therefore, based on the buck-boost Y-type inverter architecture with a new return path, further optimizing the configuration and coordinated control of flying capacitors to expand the voltage regulation range, improve energy flow characteristics, and enhance drive system stability has become a key direction for solving current technical bottlenecks and promoting the development of high-efficiency motor drives.
[0003] To address the aforementioned issues, this invention proposes a new return path buck-boost Y-type motor driver with a flying capacitor. Summary of the Invention
[0004] The purpose of this invention is to provide a buck-boost Y-type motor driver with a new return path for the flying capacitor, in order to solve the problems of narrow driving voltage adjustment range, large energy return path loss and insufficient synergy of the traditional driving capacitor.
[0005] The technical solution adopted by this utility model is as follows: a flyover capacitor new return path buck-boost Y-type motor driver, characterized in that it includes a DC input module Udc, a flyover capacitor, a Buck module, a new path module, a Boost module, multiple intermediate flyover capacitors, a MOSFET control module, and a three-phase Y-type motor; the output terminal of the DC input module is connected to the input terminal of the flyover capacitor, the output terminal of the flyover capacitor is connected to the input terminal of the three-phase Buck-Boost module, the output of the MOSFET control module is connected to the input terminal of the Buck-Boost module, and the three-phase Y-type motor is connected to the output terminal of the Boost module; the flyover capacitor Buck converter module includes capacitors C1, C2, C3, and C4, crystal switches T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, and T11, and a crystal switch... The diodes are: T12, D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, and D12; the flying capacitor Boost converter module includes crystal switches T13, T14, T15, T16, T17, T18, T19, and T20. Switch T21, crystal switch T22, crystal switch T23, crystal switch T24, diode D13, diode D14, diode D15, diode D16, diode D17, diode D18, diode D19, diode D120, diode D21, diode D22, diode D23, diode D24, capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C9, capacitor C10; the new path includes inductors L1, L2, and L3.
[0006] The aforementioned flyover capacitor new return path buck-boost Y-type motor driver is characterized in that: the positive terminal of the DC input module is connected to the drain of the crystal switch T1 and the positive terminal of the capacitor C1, and the negative terminal of the DC voltage source is connected to the source of the crystal switch T4 and the negative terminal of the capacitor C1.
[0007] The aforementioned flyover capacitor new return path buck-boost Y-type motor driver is characterized in that: the MOSFET control module outputs 24 control signals, with output interfaces for MOSFETs T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, and T24.
[0008] The aforementioned flyover capacitor new return path buck-boost Y-type motor driver is characterized in that: in the flyover capacitor Buck-Boost module, capacitor C1 is connected in parallel with the DC input module and the Buck module; the gate of transistor T1 is connected to the output port of MOSFET control module T1, its drain is connected to the positive terminal of DC input voltage and the cathode of diode D1, and its source is connected to the positive terminal of capacitor C2 and the anode of D1; the gate of transistor T2 is connected to the output port of MOSFET control module T2, its drain is connected to the positive terminal of capacitor C2 and the cathode of diode D2, and its source is connected to the source of transistor T14 and the anode of D2; the gate of transistor T3 is connected to the output port of MOSFET control module T2. The output port of transistor T3 is connected, its drain is connected to the source of transistor T14 and the cathode of diode D3, and its source is connected to the negative terminal of capacitor C2 and the anode of D3. The gate of transistor T4 is connected to the output port of MOSFET control module, its drain is connected to the negative terminal of capacitor C2 and the cathode of diode D4, and its source is connected to the negative terminal of DC input voltage and the anode of D4. The gate of transistor T5 is connected to the output port of MOSFET control module, its drain is connected to the positive terminal of DC input voltage and the cathode of diode D5, and its source is connected to the positive terminal of capacitor C3 and the anode of D5. The gate of transistor T6 is connected to the output port of MOSFET control module, its drain is connected to the positive terminal of capacitor C3 and the anode of diode D5. The cathode of transistor D6 is connected to the cathode, and the source is connected to the source of transistor T18 and the anode of D6. The gate of transistor T7 is connected to the output port of MOSFET control module T7, the drain is connected to the source of transistor T18 and the cathode of diode D7, and the source is connected to the negative terminal of capacitor C3 and the anode of D7. The gate of transistor T8 is connected to the output port of MOSFET control module T8, the drain is connected to the negative terminal of capacitor C3 and the cathode of diode D8, and the source is connected to the negative terminal of DC input voltage and the anode of D8. The gate of transistor T9 is connected to the output port of MOSFET control module T9, the drain is connected to the positive terminal of DC input voltage and the cathode of diode D9, and the source is connected to the positive terminal of capacitor C4 and... The anode of D9 is connected; the gate of transistor T10 is connected to the output port of T10 in the MOSFET control module; its drain is connected to the positive terminal of capacitor C4 and the cathode of diode D10; its source is connected to the source of transistor T22 and the anode of D10; the gate of transistor T11 is connected to the output port of T11 in the MOSFET control module; its drain is connected to the source of transistor T22 and the cathode of diode D11; its source is connected to the negative terminal of capacitor C4 and the anode of D11; the gate of transistor T12 is connected to the output port of T12 in the MOSFET control module; its drain is connected to the negative terminal of capacitor C4 and the cathode of diode D12; its source is connected to the negative terminal of the DC input voltage and the anode of D12.The gate of transistor T13 is connected to the output port of MOSFET control module T13, its drain is connected to the positive terminal of capacitor C6 and the cathode of diode D13, and its source is connected to the positive terminal of capacitor C5 and the anode of diode D13. The gate of transistor T14 is connected to the output port of MOSFET control module T14, its drain is connected to capacitor C5 and the cathode of diode D14, and its source is connected to the anode of diode D14. The gate of transistor T15 is connected to the output port of MOSFET control module T15, its drain is connected to the cathode of diode D15, and its source is connected to the negative terminal of capacitor C5 and the anode of diode D15. The gate of transistor T16 is connected to the output port of MOSFET control module T16, its drain is connected to the anode of capacitor C5 and the cathode of diode D16, and its source is connected to the cathode of capacitor C6 and the anode of diode D16. The gate of transistor T17 is connected to the output port of MOSFET control module T17, its drain is connected to the anode of capacitor C8 and the cathode of diode D17, and its source is connected to the anode of capacitor C7 and the anode of diode D17. The gate of transistor T18 is connected to the output port of MOSFET control module T18, its drain is connected to the cathode of capacitor C7 and the cathode of diode D18, and its source is connected to the anode of diode D18. The gate of transistor T19 is connected to the output port of MOSFET control module T19, its drain is connected to the cathode of diode D19, and its source is connected to the negative terminal of capacitor C7 and the anode of diode D19. The gate of transistor T20 is connected to the output port of MOSFET control module T20, its drain is connected to the anode of capacitor C7 and the cathode of diode D20, and its source is connected to the negative terminal of capacitor C8 and the anode of diode D20. The gate of transistor T21 is connected to the output port of MOSFET control module T21, its drain is connected to the positive terminal of capacitor C10 and the cathode of diode D21, and its source is connected to the positive terminal of capacitor 9 and the anode of diode D21. The gate of transistor T22 is connected to the output port of MOSFET control module T22, its drain is connected to capacitor C9 and the cathode of diode D22, and its source is connected to the anode of diode D22. The gate of transistor T23 is connected to the output port of MOSFET control module T23, its drain is connected to the cathode of diode D23, and its source is connected to the negative terminal of capacitor C9 and the anode of diode D23. The gate of transistor T24 is connected to the output port of MOSFET control module T24, its drain is connected to the anode of capacitor C9 and the cathode of diode D24, and its source is connected to the negative terminal of capacitor C10 and the anode of diode D24.
[0009] The aforementioned flyover capacitor new return path buck-boost Y-type motor driver is characterized in that: in the three-phase Y-type motor module, phases a, b, and c are connected in a star configuration, phase a is connected to the drain of transistor T13, phase b is connected to the drain of transistor T17, and phase c is connected to the drain of transistor T21.
[0010] The aforementioned fly-through capacitor new return path buck-boost Y-type motor driver is characterized in that: in the new path module, one end of inductors L1, L2, and L3 is connected to the source of crystal switches T16, T20, and T24, respectively, and the other end is connected to the negative terminal of the DC input voltage.
[0011] The advantages of this novel fly-through capacitor return path buck-boost Y-type motor driver are as follows: First, in the core inverter drive section, a different fly-through capacitor configuration compared to traditional inverter drives is applied. Through multi-capacitor series voltage division and auxiliary voltage regulation, a multi-stage voltage platform is constructed. Second, in the energy transmission and regulation section, a new return path module is added, forming a collaborative design with the Buck and Boost modules. This enables the driver to achieve low-loss, wide-range voltage output and efficient energy feedback. Compared to traditional single-topology motor drivers, this novel fly-through capacitor return path buck-boost Y-type motor driver offers a wider range of output voltage adaptability, lower energy conversion losses, smaller output waveform ripple during motor operation, and more efficient energy feedback. The overall drive system is safer, more stable, and more practical. Attached Figure Description
[0012] To more clearly illustrate the proposed flyover capacitor new return path buck-boost Y-type motor driver, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments.
[0013] Figure 1 This is a circuit diagram of a buck-boost Y-type motor driver with a new return path for a flying capacitor, according to this utility model.
[0014] Figure 2 Buck-Boost module in phase a
[0015] Figure 3 For single-phase flying capacitor Buck-Boost operating mode Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It should be noted that the embodiments described herein are only some embodiments of the present utility model, and not all implementations of the present utility model. The embodiments are only exemplary.
[0017] Figure 1 This is a circuit diagram of a buck-boost Y-type motor driver with a new return path for a flying capacitor, according to this utility model. Its specific structure is as follows: It includes a DC input module Udc, a flying capacitor, a Buck module, a new path module, a Boost module, multiple intermediate flying capacitors, a MOSFET control module, and a three-phase Y-type motor. The output terminal of the DC input module is connected to the input terminal of the flying capacitor, the output terminal of the flying capacitor is connected to the input terminal of the three-phase Buck-Boost module, the output of the MOSFET control module is connected to the input terminal of the Buck-Boost module, and the three-phase Y-type motor is connected to the output terminal of the Boost module. The flying capacitor Buck converter module includes capacitors C1, C2, C3, and C4; crystal switches T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, and T12; and diodes D1 and D2. Diodes D3, D4, D5, D6, D7, D8, D9, D10, D11, and D12; the flying capacitor Boost converter module includes crystal switches T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, and T24; diodes D13, D14, D15, D16, D17, D18, D19, D120, D21, D22, D23, and D24; capacitors C5, C6, C7, C8, C9, and C10; the new path includes inductors L1, L2, and L3.
[0018] The aforementioned flyover capacitor new return path buck-boost Y-type motor driver is characterized in that: the positive terminal of the DC input module is connected to the drain of the crystal switch T1 and the positive terminal of the capacitor C1, and the negative terminal of the DC voltage source is connected to the source of the crystal switch T4 and the negative terminal of the capacitor C1.
[0019] The aforementioned flyover capacitor new return path buck-boost Y-type motor driver is characterized in that: the MOSFET control module outputs 24 control signals, with output interfaces for MOSFETs T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, and T24.
[0020] The aforementioned flyover capacitor new return path buck-boost Y-type motor driver is characterized in that: in the flyover capacitor Buck-Boost module, capacitor C1 is connected in parallel with the DC input module and the Buck module; the gate of transistor T1 is connected to the output port of MOSFET control module T1, its drain is connected to the positive terminal of DC input voltage and the cathode of diode D1, and its source is connected to the positive terminal of capacitor C2 and the anode of D1; the gate of transistor T2 is connected to the output port of MOSFET control module T2, its drain is connected to the positive terminal of capacitor C2 and the cathode of diode D2, and its source is connected to the source of transistor T14 and the anode of D2; the gate of transistor T3 is connected to the output port of MOSFET control module T2. The output port of transistor T3 is connected, its drain is connected to the source of transistor T14 and the cathode of diode D3, and its source is connected to the negative terminal of capacitor C2 and the anode of D3. The gate of transistor T4 is connected to the output port of MOSFET control module, its drain is connected to the negative terminal of capacitor C2 and the cathode of diode D4, and its source is connected to the negative terminal of DC input voltage and the anode of D4. The gate of transistor T5 is connected to the output port of MOSFET control module, its drain is connected to the positive terminal of DC input voltage and the cathode of diode D5, and its source is connected to the positive terminal of capacitor C3 and the anode of D5. The gate of transistor T6 is connected to the output port of MOSFET control module, its drain is connected to the positive terminal of capacitor C3 and the anode of diode D5. The cathode of transistor D6 is connected to the cathode, and the source is connected to the source of transistor T18 and the anode of D6. The gate of transistor T7 is connected to the output port of MOSFET control module T7, the drain is connected to the source of transistor T18 and the cathode of diode D7, and the source is connected to the negative terminal of capacitor C3 and the anode of D7. The gate of transistor T8 is connected to the output port of MOSFET control module T8, the drain is connected to the negative terminal of capacitor C3 and the cathode of diode D8, and the source is connected to the negative terminal of DC input voltage and the anode of D8. The gate of transistor T9 is connected to the output port of MOSFET control module T9, the drain is connected to the positive terminal of DC input voltage and the cathode of diode D9, and the source is connected to the positive terminal of capacitor C4 and... The anode of D9 is connected; the gate of transistor T10 is connected to the output port of T10 in the MOSFET control module; its drain is connected to the positive terminal of capacitor C4 and the cathode of diode D10; its source is connected to the source of transistor T22 and the anode of D10; the gate of transistor T11 is connected to the output port of T11 in the MOSFET control module; its drain is connected to the source of transistor T22 and the cathode of diode D11; its source is connected to the negative terminal of capacitor C4 and the anode of D11; the gate of transistor T12 is connected to the output port of T12 in the MOSFET control module; its drain is connected to the negative terminal of capacitor C4 and the cathode of diode D12; its source is connected to the negative terminal of the DC input voltage and the anode of D12.The gate of transistor T13 is connected to the output port of MOSFET control module T13, its drain is connected to the positive terminal of capacitor C6 and the cathode of diode D13, and its source is connected to the positive terminal of capacitor C5 and the anode of diode D13. The gate of transistor T14 is connected to the output port of MOSFET control module T14, its drain is connected to capacitor C5 and the cathode of diode D14, and its source is connected to the anode of diode D14. The gate of transistor T15 is connected to the output port of MOSFET control module T15, its drain is connected to the cathode of diode D15, and its source is connected to the negative terminal of capacitor C5 and the anode of diode D15. The gate of transistor T16 is connected to the output port of MOSFET control module T16, its drain is connected to the anode of capacitor C5 and the cathode of diode D16, and its source is connected to the cathode of capacitor C6 and the anode of diode D16. The gate of transistor T17 is connected to the output port of MOSFET control module T17, its drain is connected to the anode of capacitor C8 and the cathode of diode D17, and its source is connected to the anode of capacitor C7 and the anode of diode D17. The gate of transistor T18 is connected to the output port of MOSFET control module T18, its drain is connected to the cathode of capacitor C7 and the cathode of diode D18, and its source is connected to the anode of diode D18. The gate of transistor T19 is connected to the output port of MOSFET control module T19, its drain is connected to the cathode of diode D19, and its source is connected to the negative terminal of capacitor C7 and the anode of diode D19. The gate of transistor T20 is connected to the output port of MOSFET control module T20, its drain is connected to the anode of capacitor C7 and the cathode of diode D20, and its source is connected to the negative terminal of capacitor C8 and the anode of diode D20. The gate of transistor T21 is connected to the output port of MOSFET control module T21, its drain is connected to the positive terminal of capacitor C10 and the cathode of diode D21, and its source is connected to the positive terminal of capacitor 9 and the anode of diode D21. The gate of transistor T22 is connected to the output port of MOSFET control module T22, its drain is connected to capacitor C9 and the cathode of diode D22, and its source is connected to the anode of diode D22. The gate of transistor T23 is connected to the output port of MOSFET control module T23, its drain is connected to the cathode of diode D23, and its source is connected to the negative terminal of capacitor C9 and the anode of diode D23. The gate of transistor T24 is connected to the output port of MOSFET control module T24, its drain is connected to the anode of capacitor C9 and the cathode of diode D24, and its source is connected to the negative terminal of capacitor C10 and the anode of diode D24.
[0021] The aforementioned flyover capacitor new return path buck-boost Y-type motor driver is characterized in that: in the three-phase Y-type motor module, phases a, b, and c are connected in a star configuration, phase a is connected to the drain of transistor T13, phase b is connected to the drain of transistor T17, and phase c is connected to the drain of transistor T21.
[0022] The aforementioned fly-through capacitor new return path buck-boost Y-type motor driver is characterized in that: in the new path module, one end of inductors L1, L2, and L3 is connected to the source of crystal switches T16, T20, and T24, respectively, and the other end is connected to the negative terminal of the DC input voltage.
[0023] Next, please refer to Figure 1 , Figure 2 , Figure 3 The difference between this utility model's new fly-through capacitor return path buck-boost Y-type motor driver and traditional motor drivers lies in the introduction of a multi-capacitor collaborative fly-through capacitor bank and an independent new return path module to achieve wide voltage regulation and low-loss energy feedback. The inverter drive section is a collaborative system composed of a fly-through capacitor bank, a Buck converter module, a Boost converter module, and three-phase inverter arms. Figure 2 To detail the connection between the flying capacitor bank and the new return path module, three inductors correspond to different voltage nodes of the flying capacitor bank, and the control strategy of the Buck-Boost module is deeply integrated with the new path module. This means that the energy regulation and feedback logic is more precise. This structure achieves multi-level energy distribution and low-loss transmission through voltage division by the flying capacitors and energy conduction by the new path inductors.
[0024] refer to Figure 3When the drive is in Buck mode, the MOSFET control module outputs a signal to keep T13 and T16 of the Boost module continuously off, while T1 and T4 alternately conduct according to the PWM pattern, and T2 and T3 cooperate in freewheeling. At this time, the DC power supply, after being stepped down by the Buck module, transfers energy to the flying capacitor bank through the new path inductor. The flying capacitor stabilizes the intermediate voltage through multi-node voltage division, and finally outputs three-phase AC power lower than the input voltage through the three-phase inverter bridge arm. Compared to traditional buck drives, the voltage division effect of the flying capacitor in this mode reduces the voltage stress on the switching transistors, and the new path inductor reduces energy transfer losses. When the drive switches to Boost mode, the control module keeps T1 and T4 continuously off, while T2 and T3 alternately conduct according to the PWM pattern, and T13 and T16 of the Boost module cooperate in energy storage. At this point, the energy stored in the flying capacitor bank is boosted by the Boost module and output as three-phase AC power higher than the input voltage through the three-phase inverter bridge arm. The new path module also serves as an energy feedback channel, guiding the surplus energy during motor braking back to the flying capacitor bank. Similarly, through the synergy of the flying capacitor and the new path, the switching transistors maintain low voltage stress, solving the problem of high energy feedback losses in traditional boost drives. The three bridge arms of the three-phase inverter bridge arm have independent control strategies. The MOSFET control module outputs PWM signals with a 120° phase difference to control the on / off state of the switching transistors in each bridge arm, achieving independent regulation of the three-phase voltage. After being inverted by their respective bridge arms, the three-phase power is directly input to the stator windings of the three-phase Y-type motor, driving the motor to operate stably. Simultaneously, the new path module adapts to the energy flow direction in real time, ensuring operational stability under different operating conditions.
[0025] The above description is only a preferred embodiment of the present utility model, but it is not intended to limit the present utility model. Those skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model should be determined by the claims.
Claims
1. A flyover capacitor new return path buck-boost Y-type motor driver, characterized in that, The system includes a DC input module (Udc), a flying capacitor, a Buck module, a new path module, a Boost module, multiple intermediate flying capacitors, a MOSFET control module, and a three-phase Y-type motor. The output of the DC input module is connected to the input of the flying capacitor, the output of the flying capacitor is connected to the input of the three-phase Buck-Boost module, the output of the MOSFET control module is connected to the input of the Buck-Boost module, and the three-phase Y-type motor is connected to the output of the Boost module. The flying capacitor Buck converter module includes capacitors C1, C2, C3, and C4; crystal switches T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, and T12; and diodes D1, D2, and D3.
3. Diodes D4, D5, D6, D7, D8, D9, D10, D11, and D12; the flying capacitor Boost converter module includes crystal switches T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, and T24; diodes D13, D14, D15, D16, D17, D18, D19, D120, D21, D22, D23, and D24; capacitors C5, C6, C7, C8, C9, and C10; the new path includes inductors L1, L2, and L3.
2. The flyover capacitor new return path buck-boost Y-type motor driver as described in claim 1, characterized in that: The positive terminal of the DC input module is connected to the drain of the crystal switch T1 and the positive terminal of the capacitor C1, and the negative terminal of the DC voltage source is connected to the source of the crystal switch T4 and the negative terminal of the capacitor C1.
3. The flyover capacitor new return path buck-boost Y-type motor driver as described in claim 1, characterized in that: The MOSFET control module outputs 24 control signals, with output interfaces for MOSFETs T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, and T24.
4. The flyover capacitor new return path buck-boost Y-type motor driver as described in claim 1, characterized in that: In the aforementioned flying capacitor Buck-Boost module, capacitor C1 is connected in parallel with the DC input module and the Buck module. The gate of transistor T1 is connected to the output port of MOSFET control module T1, its drain is connected to the positive terminal of the DC input voltage and the cathode of diode D1, and its source is connected to the positive terminal of capacitor C2 and the anode of D1. The gate of transistor T2 is connected to the output port of MOSFET control module T2, its drain is connected to the positive terminal of capacitor C2 and the cathode of diode D2, and its source is connected to the source of transistor T14 and the anode of D2. The gate of transistor T3 is connected to the output port of MOSFET control module T3, its drain is connected to the source of transistor T14 and the cathode of diode D3, and its source is connected to the negative terminal of capacitor C2 and the anode of D3. The gate of transistor T4 is connected to the output port of MOSFET control module T4, its drain is connected to the negative terminal of capacitor C2 and the cathode of diode D4, and its source is connected to the negative terminal of the DC input voltage and the anode of D4. The gate of transistor T5 is connected to the output port of MOSFET control module T5, its drain is connected to the positive terminal of DC input voltage and the cathode of diode D5, and its source is connected to the positive terminal of capacitor C3 and the anode of D5. The gate of transistor T6 is connected to the output port of MOSFET control module T6, its drain is connected to the positive terminal of capacitor C3 and the cathode of diode D6, and its source is connected to the source of transistor T18 and the anode of D6. The gate of transistor T7 is connected to the output port of MOSFET control module T7, its drain is connected to the source of transistor T18 and the cathode of diode D7, and its source is connected to the negative terminal of capacitor C3 and the anode of D7. The gate of transistor T8 is connected to the output port of MOSFET control module T7. The gate of transistor T9 is connected to the output port of MOSFET control module, its drain is connected to the negative terminal of capacitor C3 and the cathode of diode D8, and its source is connected to the negative terminal of DC input voltage and the anode of D8. The gate of transistor T9 is connected to the output port of MOSFET control module, its drain is connected to the positive terminal of DC input voltage and the cathode of diode D9, and its source is connected to the positive terminal of capacitor C4 and the anode of D9. The gate of transistor T10 is connected to the output port of MOSFET control module, its drain is connected to the positive terminal of capacitor C4 and the cathode of diode D10, and its source is connected to the source of transistor T22 and the anode of D10. The gate of transistor T11 is connected to the output port of MOSFET control module, and its drain is connected to the output port of transistor T11. The source of transistor T22 is connected to the cathode of diode D11, and the source is connected to the negative terminal of capacitor C4 and the anode of D11. The gate of transistor T12 is connected to the output port of MOSFET control module T12, the drain is connected to the negative terminal of capacitor C4 and the cathode of diode D12, and the source is connected to the negative terminal of DC input voltage and the anode of D12. The gate of transistor T13 is connected to the output port of MOSFET control module T13, the drain is connected to the positive terminal of capacitor C6 and the cathode of diode D13, and the source is connected to the positive terminal of capacitor C5 and the anode of diode D13. The gate of transistor T14 is connected to the output port of MOSFET control module T14, and the drain is connected to the cathode of capacitor C5 and the cathode of diode D14. The gate and source of transistor T15 are connected to the anode of diode D14. The gate of transistor T15 is connected to the output port of MOSFET control module T15, the drain is connected to the cathode of diode D15, and the source is connected to the negative terminal of capacitor C5 and the anode of diode D15. The gate of transistor T16 is connected to the output port of MOSFET control module T16, the drain is connected to the anode of capacitor C5 and the cathode of diode D16, and the source is connected to the negative terminal of capacitor C6 and the anode of diode D16. The gate of transistor T17 is connected to the output port of MOSFET control module T17, the drain is connected to the positive terminal of capacitor C8 and the cathode of diode D17, and the source is connected to the positive terminal of capacitor C7 and the anode of diode D17.The gate of transistor T18 is connected to the output port of MOSFET control module T18, its drain is connected to capacitor C7 and the cathode of diode D18, and its source is connected to the anode of diode D18. The gate of transistor T19 is connected to the output port of MOSFET control module T19, its drain is connected to the cathode of diode D19, and its source is connected to the negative terminal of capacitor C7 and the anode of diode D19. The gate of transistor T20 is connected to the output port of MOSFET control module T20, its drain is connected to the anode of capacitor C7 and the cathode of diode D20, and its source is connected to the negative terminal of capacitor C8 and the anode of diode D20. The gate of transistor T21 is connected to the output port of MOSFET control module T21, and its drain is connected to capacitor C1... The positive terminal of transistor T0 is connected to the cathode of diode D21, and the source is connected to the positive terminal of capacitor C9 and the anode of diode D21. The gate of transistor T22 is connected to the output port of MOSFET control module T22, the drain is connected to capacitor C9 and the cathode of diode D22, and the source is connected to the anode of diode D22. The gate of transistor T23 is connected to the output port of MOSFET control module T23, the drain is connected to the cathode of diode D23, and the source is connected to the negative terminal of capacitor C9 and the anode of diode D23. The gate of transistor T24 is connected to the output port of MOSFET control module T24, the drain is connected to the anode of capacitor C9 and the cathode of diode D24, and the source is connected to the negative terminal of capacitor C10 and the anode of diode D24.
5. A flyover capacitor new return path buck-boost Y-type motor driver as described in claim 1, characterized in that: In the aforementioned three-phase Y-type motor module, phases a, b, and c are connected in a star configuration. Phase a is connected to the drain of transistor T13, phase b is connected to the drain of transistor T17, and phase c is connected to the drain of transistor T21.
6. A flyover capacitor new return path buck-boost Y-type motor driver as described in claim 1, characterized in that: In the new path module, one end of inductors L1, L2, and L3 is connected to the source of crystal switch T16, crystal switch T20, and crystal switch T24, respectively, and the other end is connected to the negative terminal of the DC input voltage.