A power constant-speed system based on stepless speed change and series-parallel conversion circuit

Abstract

The application discloses a power steady system based on stepless speed change and series-parallel conversion circuit, and belongs to the technical field of power steady speed, wherein the series-parallel conversion circuit comprises a driving module, a first terminal group and a second terminal group; a multi-grade switch connected with the first terminal group; a brake module in communication or disconnection with the multi-grade switch; n series-parallel conversion single modules, wherein n is an integer greater than or equal to 2; the n series-parallel conversion single modules are in series connection and / or parallel connection; the series-parallel conversion single modules in series connection and / or parallel connection are connected with the multi-grade switch and the second terminal group. The connection state of the driving module is changed, so that the speed of the driving module is quickly adjusted.

Description

Technical Field

[0001] This invention relates to the field of power speed stabilization technology, and in particular to a power speed stabilization system based on continuously variable transmission and series-parallel conversion circuits. Background Technology

[0002] With the rapid development of new energy technologies, electric control speed regulation and stabilization technologies are becoming increasingly mature. Using a DC motor in parallel with a rotating mechanism can suppress overspeed of the rotating mechanism and assist in insufficient power, thereby stabilizing the speed of the rotating mechanism, uniformly distributing power, and achieving high-quality and stable operation. However, at present, hybrid speed regulation mechanisms all use a single battery structure, and the batteries can only be connected in parallel or series. The response to energy recovery and release is slow. This design can utilize the voltage generated by the continuously variable transmission and the series-parallel conversion circuit to adapt and realize the flexible adjustment of the series-parallel power control circuit under different speed conditions. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0005] Therefore, one object of the present invention is to provide a series-parallel conversion circuit, the technical problem to be solved by using a fast series-parallel conversion circuit to quickly adjust the voltage and current of battery charging and discharging, which can achieve efficient power braking or gain and can be applied to the speed stability of rotating devices including new energy sources.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a series-parallel conversion circuit, comprising: a driving module including a first terminal group and a second terminal group; a multi-position switch connected to the first terminal group; a braking module connected or disconnected from the multi-position switch; and n series-parallel conversion unit modules, where n is an integer ≥ 2; the n series-parallel conversion unit modules are connected in series and / or in parallel; the n series-parallel conversion unit modules connected in series and / or in parallel are connected to the multi-position switch and the second terminal group.

[0007] In a preferred embodiment of the series-parallel conversion circuit of the present invention, the first terminal group includes a first braking terminal and a first acceleration terminal; the multi-position switch is a two-position switch, with the same side of the two-position switch connected to the first braking terminal and the first acceleration terminal respectively, and the other side of the two-position switch adapted to be connected to the braking module.

[0008] In a preferred embodiment of the series-parallel conversion circuit of the present invention, the braking module includes a fifth MOSFET, a fifth driver, and a fifth impedance; the drain (D) of the fifth MOSFET is connected to the two-position switch via a sixteenth switch, and the gate (G) of the fifth MOSFET is connected to the fifth driver; the fifth impedance includes a fifth secondary capacitor and a fifth inductor connected in parallel, one end of the fifth secondary capacitor and the fifth inductor is connected to the source (S) of the fifth MOSFET, and the other end of the fifth secondary capacitor and the fifth inductor is connected to ground after being connected to a first resistor; the fifth driver has a fifth pin.

[0009] In a preferred embodiment of the series-parallel conversion circuit of the present invention, the series-parallel conversion unit module includes a capacitor battery; one corresponding end of the capacitor battery of two adjacent series-parallel conversion unit modules is connected through a first switch and a second switch, and the other corresponding end of the capacitor battery of two adjacent series-parallel conversion unit modules is connected through a third switch; a fourth switch is also connected between the second switch and the third switch; the series or parallel connection state between two adjacent capacitor battery modules is adjusted by controlling the on / off state of the first switch, the second switch, the third switch and the fourth switch.

[0010] In a preferred embodiment of the series-parallel conversion circuit of the present invention, the capacitor battery device includes a battery section and a main capacitor section connected in parallel; the positive terminal of the battery section and one end of the main capacitor section are both connected to the first switch, and the negative terminal of the battery section and the other end of the main capacitor section are both connected to the third switch.

[0011] As a preferred embodiment of the series-parallel conversion circuit of the present invention, the series-parallel conversion unit module includes an impedance section, a main MOSFET section, and a main driver. One end of the impedance section is connected to the source (S) terminal of the main MOSFET section, and the other end of the impedance section is connected to the parallel battery section and the main capacitor section. The drain (D) terminal of the main MOSFET section is connected to the second switching device, and the gate (G) terminal of the main MOSFET section is connected to the main driver. The main driver is provided with a pin section.

[0012] In a preferred embodiment of the series-parallel conversion circuit of the present invention, the second terminal group includes a second braking terminal and a second acceleration terminal; the negative terminal of the battery section a is also connected to the second acceleration terminal, and the negative terminal of the battery section is also connected to the second braking terminal through the third switch.

[0013] As a preferred embodiment of the present invention based on a series-parallel conversion circuit, wherein: a sixth MOS transistor and a sixth inductor are provided in the path between the multi-position switch K and the first acceleration terminal, the gate of the sixth MOS transistor is connected to a sixth driver, and the sixth driver is provided with a sixth pin; a first diode, multiple auxiliary capacitors, multiple second resistors connected in series, and an operational amplifier chip are connected across the path between the multi-position switch and the first acceleration terminal, and the path between the negative terminal of the battery and the second acceleration terminal; the operational amplifier chip is provided with operational amplifier chip pins, and the second resistors are connected to the operational amplifier chip.

[0014] The second objective of this invention is to provide an electric speed stabilization system, which addresses the technical problem of how to quickly adjust the speed of a motor.

[0015] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an electric speed stabilization system, including the above-mentioned series-parallel conversion circuit; and a continuously variable transmission (CVT) driven shaft, a CVT drive shaft, a belt, and a hydraulic mechanism, wherein the drive module is drively connected to the drive shaft; a control unit, including a first data transmission interface connected to the pins of the operational amplifier chip; a second data transmission interface connected to the first, second, third, and fourth switches of the capacitor battery; a third data transmission interface connected to the multi-speed switch and the sixteenth switch; and a fourth data transmission interface connected to the pins on the main driver, the fifth pin on the fifth driver, and the sixth pin on the sixth driver.

[0016] In a preferred embodiment of the power speed stabilization system of the present invention, the fifth driver, the main driver, and the sixth driver have the same structure, the main driver includes a driver chip; the HIN interface and LIN interface of the driver chip are connected to the pin section; the COM interface of the driver chip is grounded; and the VCC interface of the driver chip is connected to VCC.

[0017] The beneficial effects of this invention are as follows: by connecting n series-parallel conversion modules in series and / or parallel, the connection state of the drive module is changed, which can adapt to different voltage conditions. By using stepless speed change, the speed of the DC motor can be quickly changed to adapt to various voltage levels, thereby realizing rapid adjustment of the speed of the drive module. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0019] Figure 1 This is a circuit diagram of a single module for series-parallel conversion circuit.

[0020] Figure 2 This is a circuit diagram for series-parallel conversion.

[0021] Figure 3 This is a diagram of the continuously variable transmission mechanism for an electric speed stabilization system.

[0022] Figure 4 This is a wiring diagram for an electric speed stabilization system.

[0023] Figure 5 The circuit diagram shows the four-battery parallel configuration for the braking mode of the series-parallel conversion circuit.

[0024] Figure 6 This is a circuit diagram of the parallel mode of the braking mode of the series-parallel conversion circuit with a missing battery.

[0025] Figure 7 The circuit diagram shows the dual-battery series mode of the braking mode for the series-parallel conversion circuit.

[0026] Figure 8 The circuit diagram shows a four-cell series configuration for the power boosting mode of the series-parallel conversion circuit.

[0027] Figure 9 The circuit diagram shows the three-cell series configuration for the power boosting mode of the series-parallel conversion circuit.

[0028] Figure 10 The circuit diagram shows the dual-cell series mode of the power-boosting circuit for the series-parallel conversion circuit.

[0029] Figure 11 The circuit diagram shows the power-boosting mode of the series-parallel conversion circuit, which is a battery parallel connection followed by a series connection mode.

[0030] Figure 12 This is a circuit diagram of a battery uniform charging mode for a series-parallel conversion circuit. Detailed Implementation

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the present invention will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure will be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0034] Furthermore, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0035] Example 1

[0036] Reference Figures 1-4 This is the first embodiment of the present invention. This embodiment provides a series-parallel conversion circuit, which includes a drive module 100, a multi-position switch K6, and a braking module 200; the drive module 100.

[0037] Specifically, the drive module 100 includes a first terminal group 101 and a second terminal group 102; the multi-position switch K6 is connected to the first terminal group 101; the braking module 200 is connected or disconnected from the multi-position switch K6; four series-parallel conversion unit modules 300 are provided, and the four series-parallel conversion unit modules 300 are connected in series and / or in parallel; the four series-parallel conversion unit modules 300 connected in series and / or in parallel are connected to the multi-position switch K6 and the second terminal group 102.

[0038] Preferably, the first terminal group 101 includes a first braking terminal 101a and a first acceleration terminal 101b; the multi-position switch K6 in this embodiment is a two-position switch, with the same side of the two-position switch connected to the first braking terminal 101a and the first acceleration terminal 101b respectively, and the other side of the two-position switch connected to the braking module 200; the braking module 200 and the two-position switch can be connected or disconnected.

[0039] Preferably, the braking module 200 includes a fifth MOSFET 201, a fifth driver 202, and a fifth impedance XL0; the drain (D) of the fifth MOSFET 201 is connected to a two-position switch via a sixteenth switch K5, and the gate (G) of the fifth MOSFET 201 is connected to the fifth driver 202; the fifth impedance XL0 includes a fifth secondary capacitor 203 and a fifth inductor 204 connected in parallel, one end of the fifth secondary capacitor 203 and the fifth inductor 204 is connected to the source (S) of the fifth MOSFET 201, and the other end of the fifth secondary capacitor 203 and the fifth inductor 204 is connected to a first resistor R1 and then grounded; the fifth driver 202 is provided with a fifth pin PA5.

[0040] Preferably, each of the series-parallel conversion unit modules 300 includes a capacitor battery 301; one corresponding end of the capacitor battery 301 of two adjacent series-parallel conversion unit modules 300 is connected through a first switch 302 and a second switch 303, and the other corresponding end of the capacitor battery 301 of two adjacent series-parallel conversion unit modules 300 is connected through a third switch 304, and a fourth switch 305 is connected between the second switch 303 and the third switch 304; by controlling the first switch 302, the second switch 303, the third switch 304 and the fourth switch... The on / off state of 305 adjusts the series or parallel connection state between two adjacent capacitor battery components 301; wherein the first switch component 302 includes the first switch K12, the second switch K22, the third switch K32, and the fourth switch K42; the second switch component 303 includes the fifth switch K15, the sixth switch K25, the seventh switch K35, and the eighth switch K45; the third switch component 304 includes the ninth switch K11, the tenth switch K21, the eleventh switch K31, and the twelfth switch K41; and the fourth switch component 305 includes the thirteenth switch K14, the fourteenth switch K24, and the fifteenth switch K34.

[0041] Preferably, the capacitor battery assembly 301 includes a battery section 301a and a main capacitor section 301b connected in parallel; the positive terminal of the battery section 301a and one end of the main capacitor section 301b are both connected to the first switch 302, and the negative terminal of the battery section 301a and the other end of the main capacitor section 301b are both connected to the third switch 304; the battery section 301a includes a first battery E1, a second battery E2, a third battery E3 and a fourth battery E4; the main capacitor section 301b includes a first main capacitor C1, a second main capacitor C2, a third main capacitor C3 and a fourth main capacitor C4.

[0042] Furthermore, the series-parallel conversion unit module 300 includes an impedance section 306, a main MOSFET section 307, and a main driver 308. One end of the impedance section 306 is connected to the source (S) terminal of the main MOSFET section 307, and the other end of the impedance section 306 is connected to the parallel battery section 301a and the main capacitor section 301b. The drain (D) terminal of the main MOSFET section 307 is connected to the second switching element 303, and the gate (G) terminal of the main MOSFET section 307 is connected to the main driver 308. The main driver 308 has a pin section 309. The impedance section 306 includes a first... The main MOSFET section 307 includes a first MOSFET 307a, a second MOSFET 307b, a third MOSFET 307c, and a fourth MOSFET 307d; the main driver 308 includes a first driver 308a, a second driver 308b, a third driver 308c, and a fourth driver 308d; and the pin section 309 includes a first pin PA1, a second pin PA2, a third pin PA3, and a fourth pin PA4.

[0043] Furthermore, the second terminal group 102 includes a second braking terminal 102a and a second acceleration terminal 102b; the negative terminal of the battery section 301a is also connected to the second acceleration terminal 102b, and the negative terminal of the battery section 301a is also connected to the second braking terminal 102a through a third switch member 304.

[0044] Furthermore, a sixth MOSFET 401 and a sixth inductor 402 are provided in the path between the multi-position switch K6 and the first acceleration terminal 101b. The gate of the sixth MOSFET 401 is connected to the sixth driver 403, and the sixth driver 403 is provided with a sixth pin PA6. A first diode D1, multiple auxiliary capacitors 405, multiple second resistors R2 connected in series, and an operational amplifier chip A are connected across the path between the multi-position switch K6 and the first acceleration terminal 101b, and the path between the negative terminal of the battery section 301a and the second acceleration terminal 102b. The operational amplifier chip A is provided with an operational amplifier chip pin PC4, and the second resistors R2 are connected to the operational amplifier chip A.

[0045] If the impedance section 306 and the first MOS transistor 307a of the first driver 308a are connected in series, the charging impedance to the first battery E1 can be changed by generating a variable frequency current, thereby changing the charging power. The first main capacitor C1 connected in parallel with the first battery E1 can perform filtering and voltage regulation. The ninth switch K11, the first switch K12, the thirteenth switch K14, and the fifth switch K15 can realize the series-parallel interchange of the first battery E1, as well as the charging and discharging conversion, the protection and deactivation of the first battery E1, and the uniform charging function within the first battery E1.

[0046] The parallel connection of two series-parallel conversion unit modules 300 can realize the interchange of the series-parallel structure of the capacitor battery 301, thereby improving the responsiveness of charging and discharging power as well as the responsiveness of the drive module 100 control. For example, when the sixth switch K25, the seventh switch K35, the tenth switch K21, and the eleventh switch K31 are closed, and the second switch K22, the fourteenth switch K24, the third switch K32, and the fifteenth switch K34 are open, the second pin PA2 and the third pin PA3 control the trigger pulse, thereby effectively controlling the impedance of the corresponding impedance section 306, and the first battery E1 and the second battery E2 are in parallel mode.

[0047] When the seventh switch K35, the sixth switch K25, the eleventh switch K31, the tenth switch K21, the second switch K22, the fourteenth switch K24, the third switch K32, and the fifteenth switch K34 are open, the system is in a stop working mode, which is a transitional state between series and parallel operation. When the seventh switch K35, the third switch K32, the fourteenth switch K24, and the second switch K22 are closed, the remaining switches and the corresponding first MOSFET 307a and second MOSFET 307b are open, the system is in a series operation state.

[0048] Example 2

[0049] Reference Figures 1-4 This is the second embodiment of the present invention, based on the previous embodiment. This embodiment provides an electric speed stabilization system, including a drive shaft 500 and a control unit 600.

[0050] Specifically, the drive module 100 is connected to the drive shaft 500 for transmission; the control unit 600 in this embodiment is an STM32F105 chip, which is existing technology and will not be described in detail here; the control unit 600 includes a first data transmission interface 601, which is connected to the operational amplifier chip pin PC4; the second data transmission interface 602 is connected to the first switch 302, the second switch 303, the third switch 304 and the fourth switch 305 of the capacitor battery 301; the third data transmission interface 603 is connected to the multi-position switch K6 and the sixteenth switch K5; the fourth data transmission interface 604 is connected to the pin portion 309 on the main driver 308, the fifth pin PA5 on the fifth driver 202 and the sixth pin PA6 on the sixth driver 403.

[0051] Preferably, the fifth driver 202, the main driver 308, and the sixth driver 403 have the same structure, and the main driver 308 includes a driver chip 308a. In this embodiment, the driver chip 308a of the first driver 308a, the second driver 308b, the third driver 308c, the fourth driver 308d, the fifth driver 202, and the sixth driver 403 is preferably IR2013. IR2013 is prior art and will not be described in detail here. The HIN interface and LIN interface of the driver chip 308a are connected to the pin portion 309. The COM interface of the driver chip 308a is grounded. The VCC interface of the driver chip 308a is connected to VCC.

[0052] The STM32F105 chip's PC0 interface connects to the external controlled mechanism's speed setting input signal; its PC1 interface connects to the speed calibration signal, determining whether the controlled mechanism is overspeeding or underspeeding, thereby controlling the system's braking and power boost; its PC2 interface connects to the ternary lithium battery over-temperature alarm module, receiving the battery over-temperature alarm signal; its PC3 interface connects to the protection information acquisition module, receiving overvoltage and overcurrent signals from the load side; its PC4 interface connects to the OPO7 overvoltage feedback signal output circuit, receiving the overvoltage signal from the DC-DC converter; and its PC5 interface connects to the battery voltage alarm module, transmitting the battery overvoltage signal to the CPU. PB1-P Interface B15 connects to the system's first switch K12, second switch K22, third switch K32, fourth switch K42, fifth switch K15, sixth switch K25, seventh switch K35, eighth switch K45, ninth switch K11, tenth switch K21, eleventh switch K31, twelfth switch K41, thirteenth switch K14, fourteenth switch K24, and fifteenth switch K34, respectively; interfaces PD1-PD2 control the torque of the driven wheel of the continuously variable transmission mechanism, thereby controlling the speed ratio between the driving wheel and the driven wheel; interfaces PD3-PD4 connect to the sixteenth switch K5 and the multi-speed switch K6, respectively.

[0053] The drive module 100 in this embodiment is a DC motor. In use, it can control the first battery E1, the second battery E2, the third battery E3, and the fourth battery E4 to charge and discharge evenly. The connection form between the first battery E1, the second battery E2, the third battery E3, and the fourth battery E4 is determined according to the rotational speed and braking efficiency. The impedance part 306 is used to provide strong resistance torque when the controlled drive shaft 500 is severely overspeeded and unbalanced. It can also control the output voltage and power of the DC motor and the rotational speed of the drive shaft 500.

[0054] The output shaft of the DC motor is equipped with a drive wheel, which is mounted on the drive shaft 500 and connected to a driven wheel via a chain. A continuously variable transmission (CVT) mechanism is used to transmit power between the drive and driven wheels. The speed ratio between the driven and drive wheels is changed by altering the hydraulic pressure of the driven wheel (the torque of the drive wheel is adjusted by a spring), adapting to the conversion between series and parallel voltage levels. This is existing technology and will not be elaborated upon here.

[0055] The relationship between the speed of the driving wheel and the voltage of the DC motor is as follows: E represents the output voltage of the DC motor; K is a constant. ω represents the magnetic flux; A represents the rotational speed of the DC motor (in rpm); Z represents the number of poles of the DC motor; ω1 represents the rotational speed of the driven wheel (in rpm); k represents the speed ratio of the driving wheel to the driven wheel; the relationship between the DC motor voltage and the driven wheel speed is... Increase the k coefficient using a hydraulic system to improve U Z and I Z This will improve P Z Power, conversely, can reduce the k-coefficient to reduce braking power.

[0056] When the braking mode changes from a dual-battery series connection to a four-battery parallel connection, the voltage U... Z To accommodate the reduced braking force, the coefficient of k should be significantly reduced. This decreases the torque of the driven wheel and increases the torque of the other driven wheel, which is mechanically very beneficial for braking performance. Simultaneously, the four-battery parallel connection increases the braking current, further enhancing the braking effect. When switching from a two-battery series connection to a four-battery parallel connection, the voltage decreases, the braking current increases, and the braking effect is improved.

[0057] When in boost mode, the relationship between the driven wheel speed and the DC motor voltage is as follows: At this point, the hydraulic system is used to reduce the coefficient k and decrease U. s and improve I Z This will improve P s Power, conversely, can be increased by increasing the k coefficient to reduce the boost power.

[0058] When the dual-cell series mode of the booster mode is converted to the three-cell series mode, the voltage U s To accommodate the reduced matching, the coefficient of k should be significantly increased. This increases the torque of the driven wheel and decreases the torque of the driven wheel, which is very beneficial to the gain effect from a mechanical perspective. Simultaneously, the three-cell series configuration increases the gain current, further improving the gain effect. When switching from a two-cell series configuration to a three-cell series configuration, the voltage decreases, the gain current increases, and the gain effect is improved.

[0059] By adjusting the k-coefficient through a hydraulic system, power and braking performance can be optimized in different modes. Switching between braking and boosting modes is achieved by adjusting the series and parallel configuration of the batteries and the corresponding changes in the k-coefficient. In other words, a hydraulic continuously variable transmission (CVT) mechanism is used to adjust the power transmission relationship between the motor and the load to adapt to different voltage levels and operating modes, thereby optimizing system performance.

[0060] Example 3

[0061] Reference Figure 5 This is the third embodiment of the present invention, which is based on the previous embodiment. This embodiment is a four-battery parallel configuration in braking mode.

[0062] Specifically, the fifth switch K15, the sixth switch K25, the seventh switch K35, the eighth switch K45, the ninth switch K11, the tenth switch K21, the eleventh switch K31, and the twelfth switch K41 are closed; the first switch K12, the second switch K22, the third switch K32, the fourth switch K42, the thirteenth switch K14, the fourteenth switch K24, and the fifteenth switch K34 are open; and the first braking terminal 101a is connected to the multi-position switch K6.

[0063] Preferably, the first pin PA1, the second pin PA2, the third pin PA3, and the fourth pin PA4 control the trigger frequency or the trigger duty cycle to change the impedances of the first impedance XL1, the second impedance XL2, the third impedance XL3, and the fourth impedance XL4 respectively. Based on the conditions of the first battery E1, the second battery E2, the third battery E3, and the fourth battery E4, the impedances of the first impedance XL1, the second impedance XL2, the third impedance XL3, and the fourth impedance XL4 are changed to achieve uniform charging.

[0064] At this time, the braking current is:

[0065]

[0066] Braking power is

[0067]

[0068] Where Uz is the DC motor voltage in braking mode.

[0069] Example 4

[0070] Reference Figure 6 This is the fourth embodiment of the present invention, which is based on the previous embodiment. This embodiment is a parallel mode with a low battery in braking mode.

[0071] The system stops operating when any of the first battery E1, second battery E2, third battery E3, and fourth battery E4 is over-voltaged or fully charged, or when the rotation speed is adjusted. This embodiment takes the third battery E3 as an example of stopping operation.

[0072] Specifically, the fifth switch K15, the sixth switch K25, the seventh switch K35, the eighth switch K45, the ninth switch K11, the tenth switch K21, the eleventh switch K31, and the twelfth switch K41 are closed; the first switch K12, the second switch K22, the third switch K32, the fourth switch K42, the thirteenth switch K14, the fourteenth switch K24, and the fifteenth switch K34 are open; and the first braking terminal 101a is connected to the multi-position switch K6.

[0073] Preferably, at this time, the third pin PA3 stops triggering the open circuit.

[0074] At this time, the braking current is:

[0075]

[0076] Braking power is:

[0077]

[0078] Where Uz is the DC motor voltage in braking mode.

[0079] Example 5

[0080] Reference Figure 7 This is the fifth embodiment of the present invention, which is based on the previous embodiment. This embodiment is a dual-battery series configuration for braking mode.

[0081] In this embodiment, the first braking terminal 101a is connected to the multi-position switch K6, and only the first switch K12, the thirteenth switch K14, the sixth switch K25, the seventh switch K35, and the eighth switch K45 are closed. The second pin PA2 is given a frequency trigger pulse, while the first pin PA1, the third pin PA3, and the fourth pin PA4 are disconnected or no pulse signal is given.

[0082] At this time, the braking current is:

[0083]

[0084] Braking power is:

[0085]

[0086] Where Uz is the DC motor voltage in braking mode.

[0087] Example 6

[0088] This is the sixth embodiment of the present invention, based on the previous embodiment. This embodiment is a forced braking mode of the braking mode. At this time, the sixteenth switch K5 is closed and the fifth pin PA5 controls the duty cycle and trigger frequency to enhance braking.

[0089] At this time, the braking current is:

[0090]

[0091] Braking power is:

[0092]

[0093] Where Uz is the DC motor voltage in braking mode.

[0094] Example 7

[0095] Reference Figure 8 This is the seventh embodiment of the present invention, which is based on the previous embodiment. This embodiment is a four-cell series connection mode for power enhancement.

[0096] In this embodiment, the first acceleration terminal 101b is connected to the multi-position switch K6; the eighth switch K45, the first switch K12, the thirteenth switch K14, the fourteenth switch K24, the third switch K32, the fifteenth switch K34, and the fourth switch K42 are closed. The second pin PA2 is given a frequency trigger pulse, while the first pin PA1, the third pin PA3, and the fourth pin PA4 are disconnected or not given a pulse signal.

[0097] The boosting current at this time is:

[0098]

[0099] The boosting power is:

[0100]

[0101] Where Uz is the DC motor voltage in braking mode.

[0102] Example 8

[0103] Reference Figure 9 This is the eighth embodiment of the present invention, which is based on the previous embodiment. This embodiment is a three-cell series connection mode for power enhancement.

[0104] In this embodiment, the first acceleration terminal 101b is connected to the multi-position switch K6; the first switch K12, the thirteenth switch K14, the sixth switch K25, the fifteenth switch K34, the fourth switch K42, and the eighth switch K45 are closed. The second pin PA2 is given a frequency trigger pulse, while the first pin PA1, the third pin PA3, and the fourth pin PA4 are disconnected or not given a pulse signal.

[0105] The boosting current at this time is:

[0106]

[0107] The boosting power is:

[0108]

[0109] Where Us is the DC motor voltage in boost mode.

[0110] Example 9

[0111] Reference Figure 10 This is the ninth embodiment of the present invention, which is based on the previous embodiment. This embodiment is a dual-battery series configuration for power enhancement.

[0112] In this embodiment, the first acceleration terminal 101b is connected to the multi-position switch K6; the first switch K12, the thirteenth switch K14, the sixth switch K25, the seventh switch K35, and the eighth switch K45 are closed. The second pin PA2 is given a frequency trigger pulse, while the first pin PA1, the third pin PA3, and the fourth pin PA4 are either disconnected or not given a pulse signal.

[0113] The boosting current at this time is:

[0114]

[0115] The boosting power is:

[0116]

[0117] Where Us is the DC motor voltage in boost mode.

[0118] Example 10

[0119] Reference Figure 11 This is the tenth embodiment of the present invention, which is based on the previous embodiment. This embodiment is a power-boosting mode of parallel battery connection + series connection of parallel batteries.

[0120] In this embodiment, the first acceleration terminal 101b is connected to the multi-position switch K6; the ninth switch K11, the fifth switch K15, the fourteenth switch K24, the eleventh switch K31, the seventh switch K35, and the eighth switch K45 are closed. The first pin PA1, the second pin PA2, the third pin PA3, and the fourth pin PA4 are given a trigger pulse at a given frequency.

[0121] Example 11

[0122] Reference Figure 12This is the eleventh embodiment of the present invention, which is based on the previous embodiment. This embodiment is a uniform battery charging mode.

[0123] The ninth switch K11, the fifth switch K15, and the second switch K22 are closed. The first pin PA1 is given a trigger pulse at a specified frequency.

[0124] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0125] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0126] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0127] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A series-parallel conversion circuit, characterized in that: include, The drive module (100) includes a first terminal group (101) and a second terminal group (102), wherein the first terminal group (101) includes a first braking terminal (101a) and a first acceleration terminal (101b). A multi-position switch (K6) is connected to the first terminal group (101). One side of the multi-position switch (K6) is connected to the first braking terminal (101a) and the first acceleration terminal (101b) respectively. The other side of the multi-position switch (K6) is adapted to be connected to the braking module (200). The braking module (200) is connected to or disconnected from the multi-position switch (K6); The series-parallel conversion unit module (300) is provided in n, where n is an integer ≥ 2; the n series-parallel conversion unit modules (300) are connected in series and / or in parallel; the n series-parallel conversion unit modules (300) connected in series and / or in parallel are connected to the multi-position switch (K6) and the second terminal group (102); The series-parallel conversion unit module (300) includes a capacitor battery (301); one end of the corresponding capacitor battery (301) of two adjacent series-parallel conversion unit modules (300) is connected through a first switch (302) and a second switch (303), and the other end of the corresponding capacitor battery (301) of two adjacent series-parallel conversion unit modules (300) is connected through a third switch (304), and a fourth switch (305) is also connected between the second switch (303) and the third switch (304); by controlling the first switch (302), the second switch (303), the third switch (304) and the fourth switch (305) In the on / off state, the series or parallel connection state between two adjacent capacitor battery devices (301) is adjusted. The series-parallel conversion single-unit module (300) also includes an impedance section (306), a main MOS transistor section (307) and a main driver (308). One end of the impedance section (306) is connected to the source (S) terminal of the main MOS transistor section (307), and the other end of the impedance section (306) is connected to the connection point of the capacitor battery device (301) and the first switch device (302). The gate (G) terminal of the main MOS transistor section (307) is connected to the main driver (308), and the drain (D) terminal of the main MOS transistor section (307) is connected to the MOS point of the second switch device (303) and the first switch device (302).

2. The series-parallel conversion circuit as described in claim 1, characterized in that: The multi-position switch (K6) is a two-position switch.

3. The series-parallel conversion circuit as described in claim 2, characterized in that: The braking module (200) includes a fifth MOSFET (201), a fifth driver (202), and a fifth impedance (XL0). The drain (D) of the fifth MOSFET (201) is connected to the two-position switch via the sixteenth switch (K5), and the gate (G) of the fifth MOSFET (201) is connected to the fifth driver (202). The fifth impedance (XL0) includes a fifth secondary capacitor (203) and a fifth inductor (204) connected in parallel. One end of the fifth secondary capacitor (203) and the fifth inductor (204) is connected to the source (S) of the fifth MOSFET (201), and the other end of the fifth secondary capacitor (203) and the fifth inductor (204) is connected to the ground via a first resistor (R1). The fifth driver (202) has a fifth pin (PA5).

4. The series-parallel conversion circuit as described in claim 1, characterized in that: The capacitor battery unit (301) includes a battery section (301a) and a main capacitor section (301b) connected in parallel; the positive terminal of the battery section (301a) and one end of the main capacitor section (301b) are both connected to the first switch (302), and the negative terminal of the battery section (301a) and the other end of the main capacitor section (301b) are both connected to the third switch (304).

5. The series-parallel conversion circuit as described in claim 1, characterized in that: The other end of the impedance section (306) is connected to the parallel battery section (301a) and the main capacitor section (301b); the drain of the main MOS transistor section (307) is connected to the second switch (303), and the main driver (308) is provided with a pin section (309).

6. The series-parallel conversion circuit as described in claim 5, characterized in that: The second terminal group (102) includes a second braking terminal (102a) and a second acceleration terminal (102b); the negative terminal of the battery unit (301a) is also connected to the second acceleration terminal (102b), and the negative terminal of the battery unit (301a) is also connected to the second braking terminal (102a) through the third switch (304).

7. The series-parallel conversion circuit as described in claim 6, characterized in that: A sixth MOSFET (401) and a sixth inductor (402) are provided in the path between the multi-position switch (K6) and the first acceleration terminal (101b). The gate of the sixth MOSFET (401) is connected to the sixth driver (403), and the sixth driver (403) is provided with a sixth pin (PA6). A first diode (D1), a plurality of auxiliary capacitors (405), a plurality of second resistors (R2) connected in series, and an operational amplifier chip (A) are connected across the path between the multi-position switch (K6) and the first acceleration terminal (101b) and the path between the negative terminal of the battery section (301a) and the second acceleration terminal (102b). The operational amplifier chip (A) is provided with an operational amplifier chip pin (PC4), and the second resistor (R2) is connected to the operational amplifier chip (A).

8. A power speed stabilization system, characterized in that: Including the series-parallel conversion circuit as described in claim 7; and, The drive shaft (500) is connected to the drive module (100) in a transmission manner; The control unit (600) includes a first data transmission interface (601) which is connected to the pins of the operational amplifier chip (PC4); The second data transmission interface (602) is connected to the first switch (302), the second switch (303), the third switch (304) and the fourth switch (305) of the capacitor battery (301); The third data transmission interface (603) is connected to the multi-position switch (K6) and the sixteenth switch (K5); The fourth data transmission interface (604) is connected to the pin section (309) on the main driver (308), the fifth pin (PA5) on the fifth driver (202), and the sixth pin (PA6) on the sixth driver (403).

9. The power speed stabilization system as described in claim 8, characterized in that: The fifth driver (202), the main driver (308), and the sixth driver (403) have the same structure. The main driver (308) includes a driver chip (308a). The HIN and LIN interfaces of the driver chip (308a) are connected to the pin section (309). The COM interface of the driver chip (308a) is grounded. The VCC interface of the driver chip (308a) is connected to VCC.

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