Search

CN-122008886-A - Electric vehicle composite power system integrating photovoltaic vehicle body and flywheel energy storage

CN122008886ACN 122008886 ACN122008886 ACN 122008886ACN-122008886-A

Abstract

The invention discloses an electric vehicle composite power system integrating a photovoltaic vehicle body and flywheel energy storage, which comprises a photovoltaic array unit, a self-adaptive cascade rotary transformer assembly, an active universal joint support frame and a double-winding magnetic coupling flywheel assembly, wherein a primary winding and the photovoltaic array unit are connected in series to form a closed direct current excitation loop, a precession rotating shaft of the active universal joint support frame drives a secondary rotor to generate precession angular velocity, the secondary winding passively overlaps photovoltaic excitation and precession induction potential in a physical loop, outputs composite alternating current voltage to a low-voltage photovoltaic winding, the low-voltage photovoltaic winding and a high-voltage bus winding in a motor stator are provided with mutual pole pairs to block direct electromagnetic coupling, and the high-rotational inertia flywheel rotor absorbs power fluctuation of the composite alternating current voltage to carry out mechanical filtering, induces an alternating magnetic chain in the high-voltage bus winding and finally outputs high-voltage alternating current electromotive force. The invention realizes the bottom fusion of photoelectric and mechanical energy, high-low voltage physical isolation and smooth energy transmission.

Inventors

  • GAO ZIBIN
  • WANG YIJIE
  • CHEN JIANQIANG
  • LIU LEI
  • ZHU BINGQI
  • HOU JUAN
  • YAN GAOFEI

Assignees

  • 河北央达新能源科技有限公司

Dates

Publication Date
20260512
Application Date
20260401

Claims (10)

  1. 1. An electric vehicle composite power system integrating a photovoltaic vehicle body and flywheel energy storage, which is characterized by comprising: The photovoltaic array unit (10) is fixed outside the vehicle body, the photovoltaic array unit (10) internally comprises a plurality of photovoltaic cell panels, and the photovoltaic cell panels are connected with each other through wires to form a series-parallel circuit network; The self-adaptive cascade rotary transformer assembly (20) is arranged on a chassis of a vehicle body, the self-adaptive cascade rotary transformer assembly (20) comprises a primary stator (21) and a secondary rotor (22), the primary stator (21) comprises a primary winding (211), and the primary winding (211) and the photovoltaic array unit (10) form physical and electrical connection and form a closed direct current excitation loop; the driving universal joint support frame (30) is arranged on a chassis of the vehicle body, the driving universal joint support frame (30) comprises a multi-degree-of-freedom movable frame (32) and a precession rotating shaft (33), and the secondary rotor (22) is coaxially sleeved at the extending end part of the precession rotating shaft (33) and rigidly fixed with the precession rotating shaft (33); The double-winding magnetic coupling flywheel assembly (40) is fixedly arranged inside the multi-degree-of-freedom movable frame (32), the double-winding magnetic coupling flywheel assembly (40) comprises a motor stator (41), a low-voltage photovoltaic winding (411), a high-voltage bus winding (412) and a high-moment-of-inertia flywheel rotor (42), the secondary rotor (22) comprises a secondary winding (222), the wiring end of the secondary winding (222) is electrically connected to the low-voltage photovoltaic winding (411), the high-voltage bus winding (412) and the high-moment-of-inertia flywheel rotor (42) form a magnetic circuit cross-link across a radial electromagnetic air gap, and the high-voltage bus winding (412) is provided with a three-phase output end for outputting electric energy to the outside.
  2. 2. The electric vehicle composite power system integrating photovoltaic vehicle body and flywheel energy storage according to claim 1, wherein the system further comprises a direct current bus bar (12) and a direct current connection port terminal (11), the photovoltaic array unit (10), the direct current bus bar (12), the direct current connection port terminal (11) and the primary winding (211) are sequentially connected in series to form the closed direct current excitation loop together, and the closed direct current excitation loop does not comprise a direct current boost converter and a high-frequency switch chopper device.
  3. 3. The electric vehicle composite power system integrating photovoltaic vehicle body and flywheel energy storage according to claim 1, wherein the primary stator (21) comprises a primary stator core (212), the secondary rotor (22) comprises a secondary rotor core (221), the end face of the primary stator core (212) and the end face of the secondary rotor core (221) are arranged in parallel and form an axial physical air gap, the end face of the primary stator core (212) and the end face of the secondary rotor core (221) are distributed by adopting salient pole structures, and the salient pole structures enable the spatial magnetic resistance of the axial physical air gap to be periodically changed along the circumferential direction.
  4. 4. The electric vehicle hybrid power system integrating photovoltaic vehicle body and flywheel energy storage as claimed in claim 3, wherein the output end of the secondary winding (222) outputs a composite alternating voltage The composite alternating voltage Passive superposition in the physical conductor loop of the secondary winding (222), the composite AC voltage The formula is satisfied: ; In the formula (i), For a direct excitation current flowing through the inside of the primary winding (211), For mutual inductance between the primary winding (211) and the secondary winding (222), For the mechanical deflection angle of the secondary rotor core (221) with respect to the primary stator (21), -A precession angular velocity for driving the rotation of the secondary rotor (22) for the precession axis (33).
  5. 5. The integrated photovoltaic car body and flywheel energy storage electric car composite power system according to claim 1, characterized in that the pole pair number of the low voltage photovoltaic winding (411) is configured as The pole pair number of the high-voltage bus winding (412) is configured as The polar logarithm of To the pair of polar numbers Mutually prime numbers, satisfying the constraint condition: ; The low-voltage photovoltaic winding (411) and the high-voltage bus winding (412) form orthogonal decoupling distribution in a magnetic circuit space of a stator core (413) of the motor stator (41), and direct electromagnetic coupling loops between the low-voltage photovoltaic winding (411) and the high-voltage bus winding (412) are blocked.
  6. 6. The integrated photovoltaic vehicle body and flywheel energy storage electric vehicle composite power system according to claim 5, characterized in that the high moment of inertia flywheel rotor (42) adopts a solid magnetic steel rotor structure or a squirrel cage asynchronous rotor structure, the high moment of inertia flywheel rotor (42) induces rotor current matched with externally applied magnetic field pole pair numbers in a radial electromagnetic air gap inside the motor stator (41), and the high moment of inertia flywheel rotor (42) is used as an energy transfer entity to realize energy transfer between the low voltage photovoltaic winding (411) and the high voltage bus winding (412).
  7. 7. The electric vehicle composite power system integrating photovoltaic vehicle body and flywheel energy storage according to claim 1, wherein the active universal joint support frame (30) comprises a fixed base (31) and a damping spring assembly (34), the damping spring assembly (34) is connected between the fixed base (31) and the multi-freedom-degree movable frame (32), and when the multi-freedom-degree movable frame (32) drives the precession rotating shaft (33) to generate angular deflection, the damping spring assembly (34) provides mechanical reset torque for the multi-freedom-degree movable frame (32), and the angular deflection of the multi-freedom-degree movable frame (32) is transmitted to the secondary rotor (22) through the precession rotating shaft (33) without relative sliding.
  8. 8. The integrated photovoltaic vehicle body and flywheel energy storage electric vehicle composite power system according to claim 1, further comprising a high-voltage side electromagnetic extraction and feed network, wherein the high-voltage side electromagnetic extraction and feed network comprises a three-phase rectifying module (51) and a whole vehicle high-voltage direct current bus (52), a three-phase output end of the high-voltage bus winding (412) is in physical and electrical connection with an alternating current input end of the three-phase rectifying module (51), and a direct current output end of the three-phase rectifying module (51) is connected with the whole vehicle high-voltage direct current bus (52).
  9. 9. The integrated photovoltaic vehicle body and flywheel energy storage electric vehicle hybrid powertrain of claim 8 wherein the high moment of inertia flywheel rotor (42) generates induced eddy currents or conducting bar currents during rotation and alternating flux linkages in the high voltage bus winding (412) The alternating flux linkage Inducing a high voltage ac electromotive force inside the high voltage bus winding (412) The high voltage alternating current electromotive force The formula is satisfied: ; In the formula (i), For the effective number of turns of the high voltage bus winding (412), For the alternating flux linkage Rate of change over time.
  10. 10. The integrated photovoltaic car body and flywheel energy storage electric car hybrid power system according to claim 5, characterized in that the number of phases of the secondary winding (222) of the adaptive cascade rotary transformer assembly (20) is the same as the number of phases of the low voltage photovoltaic winding (411), and the salient pole logarithm of the variable reluctance salient pole structure of the secondary rotor (22) is set to be The salient pole logarithm To the pair of polar numbers Satisfy the numerical matching relation And the fundamental frequency of the composite alternating current power output by the self-adaptive cascade rotary transformer assembly (20) is consistent with the synchronous rotating speed frequency of the low-voltage photovoltaic winding (411).

Description

Electric vehicle composite power system integrating photovoltaic vehicle body and flywheel energy storage Technical Field The invention relates to the technical field of energy recovery and power driving of electric vehicles, in particular to an electric vehicle composite power system integrating a photovoltaic vehicle body and flywheel energy storage. Background In the existing new energy electric automobile design, in order to prolong the endurance mileage, a photovoltaic panel is generally integrated on the surface of an automobile body, solar energy is converted into direct current electric energy to charge a vehicle-mounted energy storage system, meanwhile, mechanical vibration and space attitude deflection are inevitably generated on a chassis of the automobile in the running process, a part of technical schemes try to introduce a mechanical energy recovery device to capture the part of kinetic energy, under the conventional system architecture, a photovoltaic power generation unit and a mechanical energy recovery unit are used as independent energy sources, a special high-frequency power electronic converter is generally required to be respectively configured, electric energy output by a photovoltaic array is required to be processed through a boost chopper circuit, and electric energy output by the mechanical energy recovery unit is required to be regulated through a complex rectifying and inverting circuit, so that the photovoltaic power generation unit and the mechanical energy recovery unit are finally summarized and connected at the electrical level at the direct current bus end of the automobile. The existing multi-source energy converging scheme is characterized in that a large number of independent external high-frequency power electronic converters are excessively relied on, fusion of photovoltaic electric energy and mechanical kinetic energy cannot be directly realized in a bottom physical loop, photovoltaic input electric energy and vehicle mechanical vibration kinetic energy belong to energy sources with different physical properties, the prior art carries out rear-stage electric cascading through a multi-stage converter device, hardware complexity and energy loss links of an electric system are greatly increased, when photovoltaic power transient fluctuation and vehicle chassis random deflection are faced, real-time synchronization of bottom physical states cannot be realized by the independent converters, and the photovoltaic input electric energy and the vehicle mechanical vibration kinetic energy cannot be directly fused into unified composite alternating current electric energy output in a passive physical hardware level, so that coupling efficiency of multi-source energy of a whole vehicle composite power system and reliability of an integral hardware structure are limited. Disclosure of Invention The invention aims to solve the technical problems that high-frequency fluctuation of photovoltaic output power is transmitted to an electric vehicle power grid, and mechanical driving energy of a vehicle is difficult to effectively decouple and fuse with an electrical system. The invention provides an electric vehicle composite power system integrating photovoltaic vehicle body and flywheel energy storage, which comprises a photovoltaic array unit, a self-adaptive cascade rotary transformer assembly, an active universal joint support and a double-winding magnetic coupling flywheel assembly, wherein the photovoltaic array unit is fixed outside the vehicle body, the photovoltaic array unit internally comprises a plurality of photovoltaic cell panels which are connected with each other, the self-adaptive cascade rotary transformer assembly is arranged on a chassis of the vehicle body, the self-adaptive cascade rotary transformer assembly comprises a primary stator and a secondary rotor, the primary stator internally comprises a primary winding, the primary winding and the photovoltaic array unit form a closed direct current excitation loop in a physical electric connection mode, the active universal joint support comprises a multi-degree-of-freedom movable frame and a precession rotary shaft, the secondary rotor is coaxially sleeved on the extending end part of the precession rotary shaft and rigidly fixed with the precession rotary shaft, the double-winding magnetic coupling flywheel assembly is fixedly arranged inside the multi-degree-of-freedom movable frame, the double-winding magnetic coupling flywheel assembly comprises a motor stator, a low-voltage photovoltaic winding, a high-voltage bus winding and a high-moment inertia rotor, the secondary rotor internally comprises a secondary winding, the secondary winding is connected to the low-voltage winding and a high-voltage magnetic circuit output electromagnetic circuit, and the high-voltage magnetic circuit of the flywheel has a three-phase magnetic circuit, and the high-voltage magnetic circuit output magnetic circuit is arranged outsid