CN110884450A - Power supply control circuit and electric automobile - Google Patents
Power supply control circuit and electric automobile Download PDFInfo
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- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a power supply control circuit and an electric automobile. Wherein, this power control circuit includes: the vehicle-mounted power supply module is used for inputting a vehicle-mounted low-voltage power supply to the first main control module and the second main control module, wherein the first main control module is a control module of a driving circuit of the main motor, and the second main control module is a control module of a driving circuit of the auxiliary motor; the first main control module is used for distributing a first low-voltage power supply to each power utilization module of the driving circuit of the main motor, wherein the first low-voltage power supply is a power supply input by the vehicle-mounted power supply module; and the second main control module is used for distributing a second low-voltage power supply to each power utilization module of the driving circuit of the auxiliary motor, wherein the second low-voltage power supply is a power supply input by the vehicle-mounted power supply module. The invention solves the technical problem that the reliability of the control mode of most of the electric control units in the related technology is lower in an all-in-one driver control mode.
Description
Technical Field
The invention relates to the technical field of electric vehicle drive controllers, in particular to a power supply control circuit and an electric vehicle.
Background
In a pure electric commercial vehicle, an electric control unit mainly comprises a power motor driver (a main motor driver), a vehicle control unit, an auxiliary driver (comprising an oil pump driver, an air pump driver and a direct current voltage reducer DCDC), a high-voltage power distribution part, a battery management part and the like. Among them, the driving parts such as the main motor driver, the auxiliary driver, etc. are separated from each other on the vehicle, occupying limited space on the vehicle, inconvenient to maintain and high in overall cost. It has become a trend to integrate a main motor driver, an auxiliary driver, a high voltage power distribution portion, even a vehicle controller, etc. together into a driver in which a plurality of drivers are unified. At present, the common all-in-one controller scheme is that all parts are simply stacked in a driver and are separated from each other, a control power supply is connected through a plurality of wire harnesses, and the controller is easily interfered in a strong electromagnetic interference environment on an electric vehicle; or, the control parts are all integrated together, and in order to simplify the power supply and share the control power supply, in the above manner, when a certain driver fails, the whole driver may fail, the reliability is low, different interferences are mutually connected in series, normal operation of each part is influenced mutually, and the whole electromagnetic compatibility effect is poor.
In view of the above-mentioned problem that the reliability of the control mode of the electronic control unit in the related art is mostly a lower one-in-one driver, no effective solution is proposed at present.
Disclosure of Invention
The embodiment of the invention provides a power supply control circuit and an electric automobile, and at least solves the technical problem that the reliability of the control mode of most all-in-one drivers of electric control units in the related technology is low.
According to an aspect of an embodiment of the present invention, there is provided a power supply control circuit including: the vehicle-mounted power supply module is used for inputting a vehicle-mounted low-voltage power supply to the first main control module and the second main control module, wherein the first main control module is a control module of a driving circuit of a main motor, and the second main control module is a control module of a driving circuit of an auxiliary motor; the first main control module is used for distributing a first low-voltage power supply to each power utilization module of the driving circuit of the main motor, wherein the first low-voltage power supply is a power supply input by the vehicle-mounted power supply module; and the second main control module is used for distributing a second low-voltage power supply to each power utilization module of the driving circuit of the auxiliary motor, wherein the second low-voltage power supply is a power supply input by the vehicle-mounted power supply module.
Optionally, the power control circuit further comprises: and the low-pass filter is connected with the vehicle-mounted power supply module and is used for inhibiting the common-mode interference signal of the vehicle-mounted low-voltage power supply before the vehicle-mounted low-voltage power supply is input into the first main control module and the second main control module.
Optionally, the low pass filter comprises: one end of the first capacitor is connected with the vehicle-mounted power supply module, and the other end of the first capacitor is grounded; one end of the first inductor is connected with the first capacitor, and the other end of the first inductor is connected with the second capacitor, wherein the first inductor is a common-mode inductor; and one end of the second capacitor is connected with the first inductor, and the other end of the second capacitor is connected with the third capacitor.
Optionally, the power control circuit further comprises: and the pi-type filter is connected with the vehicle-mounted power supply module and is used for smoothing the harmonic waves in the vehicle-mounted low-voltage power supply provided for the first main control module and the second main control module.
Optionally, the pi-type filter includes: one end of the third capacitor is connected with the second capacitor, and the other end of the third capacitor is connected with the second inductor and the fourth capacitor; one end of the second inductor is connected with the third capacitor, and the other end of the second inductor is connected with the fourth capacitor; one end of the fourth capacitor is connected with the second inductor, and the other end of the fourth capacitor is connected with the first main control module and/or the second main control module.
Optionally, the first main control module and the second main control module respectively include: and the power supply conversion modules are used for converting the power supplies received by the first main control module and the second main control module according to the power consumption requirements of the power consumption modules.
Optionally, the plurality of power conversion modules on the first main control module include: the first power supply conversion module is used for converting the received vehicle-mounted low-voltage power supply into a power supply required by a driving part of the first main control module and providing the converted power supply part for the driving part; and the second power supply conversion module is used for converting the received vehicle-mounted low-voltage power supply into a power supply required by the main drive rotary transformer circuit and providing the converted power supply part for the main drive rotary transformer circuit.
Optionally, the plurality of power conversion modules on the first main control module further includes: the first power conversion module is used for converting the received power converted by the first power conversion module into a power required by level conversion while the first power conversion module provides the converted power to the driving part, and providing the converted power to the level; and the second power conversion module is used for converting the received power converted by the second power conversion module into a power required by a decoding core of a rotary transformer and/or an operational amplifier power supply circuit while providing the converted power for the main drive rotary transformer circuit by the second power conversion module, and providing the converted power for the decoding core of the rotary transformer and/or the operational amplifier power supply circuit.
Optionally, the plurality of power conversion modules on the first main control module further includes: the first multi-channel power conversion module is used for distributing the received vehicle-mounted low-voltage power to a plurality of sub power modules, wherein the plurality of sub power modules perform power conversion based on power requirements of a plurality of power utilization modules corresponding to the first multi-channel power conversion module, and the plurality of sub power modules comprise: the first sub-power module is used for converting the vehicle-mounted low-voltage power supply distributed by the first multi-path power supply conversion module into a power supply required by a current sensor and/or a signal processing circuit, the second sub-power module is used for converting the vehicle-mounted low-voltage power supply distributed by the first multi-path power supply conversion module into a power supply required by a temperature sampling module and/or a bus communication module, and the third sub-power module is used for converting the vehicle-mounted low-voltage power supply distributed by the first multi-path power supply conversion module into a power supply required by a Digital Signal Processor (DSP).
Optionally, the plurality of power conversion modules on the second master control module include: the third power supply conversion module is used for converting the received vehicle-mounted low-voltage power supply into a power supply required by an oil pump driving circuit of the second main control module and providing a converted power supply part for the oil pump driving circuit; and the fourth power supply conversion module is used for converting the received vehicle-mounted low-voltage power supply into a power supply required by the air pump driving circuit and providing the converted power supply part for the air pump driving circuit.
Optionally, the plurality of power conversion modules on the first main control module further includes: the third power conversion module is used for converting the received power converted by the third power conversion module into the power required by the oil pump driving level conversion and/or temperature sampling module while providing the converted power to the oil pump driving circuit, and providing the converted power to the oil pump driving level conversion and/or temperature sampling module; and the fourth power conversion module is used for converting the received power of the rest part converted by the fourth power conversion module into the power required by air pump driving level conversion and/or temperature sampling while providing the converted power to the air pump driving circuit, and providing the converted power to the air pump driving level conversion and/or temperature sampling.
Optionally, the plurality of power conversion modules on the first main control module further includes: a second multi-channel power conversion module, configured to distribute the received vehicle-mounted low-voltage power to a plurality of sub-power modules, where the plurality of sub-power modules perform power conversion based on power consumption requirements of a plurality of power consumption modules corresponding to the second multi-channel power conversion module, and the plurality of sub-power modules include: the system comprises a first multi-channel power supply conversion module, a second multi-channel power supply conversion module, a fourth sub power supply module, a fifth sub power supply module and a sixth sub power supply module, wherein the first sub power supply conversion module is used for converting a vehicle-mounted low-voltage power supply distributed by the second multi-channel power supply conversion module into a power supply required by a current sensor and/or a signal processing circuit, the fifth sub power supply module is used for converting the vehicle-mounted low-voltage power supply distributed by the second multi-channel power supply conversion module into a power supply required by an oil pump and/or air pump temperature sampling module and a bus communication module, and the sixth sub power supply module is used.
According to another aspect of the embodiment of the invention, an electric vehicle is further provided, and the power supply control circuit is used.
In the embodiment of the invention, a vehicle-mounted power supply module is adopted and is used as a first main control module and a second main control module, wherein the first main control module is a control module of a driving circuit of a main motor, and the second main control module is a control module of a driving circuit of an auxiliary motor; the first main control module is used for distributing a first low-voltage power supply to each power utilization module of the driving circuit of the main motor, wherein the first low-voltage power supply is a power supply input by the vehicle-mounted power supply module; the power control circuit in the embodiment of the invention realizes the purpose of independent design of the power circuits of the power utilization modules of the main drive part and the auxiliary drive part on the control panel, achieves the technical effect of improving the anti-interference capability of the driver in the strong electromagnetic interference environment of the electric vehicle, and further solves the technical problem that the reliability of the control mode of the multi-in-one driver is lower in most electric control units in the related technology.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic diagram of a power control circuit according to an embodiment of the invention;
fig. 2 is a schematic diagram of an alternative power control circuit according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
According to an aspect of an embodiment of the present invention, there is provided a power control circuit, and fig. 1 is a schematic diagram of a power control circuit according to an embodiment of the present invention, as shown in fig. 1, the power control circuit includes: the vehicle-mounted power supply module 11, the first main control module 13 and the second main control module 15. The power control circuit will be described in detail below.
And the vehicle-mounted power supply module 11 is used for inputting a vehicle-mounted low-voltage power supply to the first main control module and the second main control module, wherein the first main control module is a control module of a driving circuit of the main motor, and the second main control module is a control module of a driving circuit of the auxiliary motor.
Optionally, the vehicle-mounted power module may be an all-in-one driver, on a control board of the all-in-one driver, circuits with different functions are independently powered, and power supplies of the main drive part and the auxiliary drive part are independently designed.
And the first main control module 13 is used for distributing a first low-voltage power supply to each power utilization module of the driving circuit of the main motor, wherein the first low-voltage power supply is a power supply input by the vehicle-mounted power supply module.
And the second main control module 15 is configured to distribute a second low-voltage power supply to each power utilization module of the driving circuit of the auxiliary motor, where the second low-voltage power supply is a power supply input by the vehicle-mounted power supply module.
As can be seen from the above, in the embodiment of the present invention, the vehicle-mounted power supply module is used for inputting the vehicle-mounted low voltage power supply to the first main control module and the second main control module, where the first main control module is a control module of the driving circuit of the main motor, and the second main control module is a control module of the driving circuit of the auxiliary motor; then, distributing a first low-voltage power supply to each power utilization module of a driving circuit of the main motor by using the first main control module, wherein the first low-voltage power supply is a power supply input by the vehicle-mounted power supply module; and the second low-voltage power supply is distributed to each power utilization module of the driving circuit of the auxiliary motor by utilizing the second main control module, wherein the second low-voltage power supply is the power supply input by the vehicle-mounted power supply module, and the purpose of independent design of power supply circuits of each power utilization module of the main driving part and the auxiliary driving part on the control panel is realized.
It is easy to notice, because the vehicle-mounted power supply module can be with after the on-vehicle low voltage power supply inputs first host system and second host system, utilize and utilize first host system and second host system respectively to first low voltage power supply and second low voltage power supply, distribute respectively to each power module of the drive circuit of main motor and each power module of the drive circuit of auxiliary motor, the purpose of having realized the independent design of power supply circuit of each power module of main drive part and auxiliary drive part on the control panel, the technological effect of the interference killing feature of improvement controller under the strong electromagnetic interference environment of electric motor car has been reached.
Therefore, the power control circuit provided by the embodiment of the invention further solves the technical problem that the reliability of the control mode of most all-in-one drivers of the electric control units in the related art is lower.
Because the driver in the embodiment of the present invention is an all-in-one driver, and the main motor driver, the auxiliary driver, the high voltage power distribution part, and even the vehicle control unit are integrated together to form the driver with a plurality of drivers in one, in order to effectively reduce the influence of strong electromagnetic interference on the control signal, the power control circuit may further include: and the low-pass filter is connected with the vehicle-mounted power supply module and is used for inhibiting the common-mode interference signal of the vehicle-mounted low-voltage power supply before the vehicle-mounted low-voltage power supply is input into the first main control module and the second main control module.
Optionally, the low pass filter comprises: one end of the first capacitor is connected with the vehicle-mounted power supply module, and the other end of the first capacitor is grounded; one end of the first inductor is connected with the first capacitor, and the other end of the first inductor is connected with the second capacitor, wherein the first inductor is a common-mode inductor; and one end of the second capacitor is connected with the first inductor, and the other end of the second capacitor is connected with the third capacitor.
Fig. 2 is a schematic diagram of an alternative power control circuit according to an embodiment of the invention, as shown in fig. 2, the power control circuit comprising: a primary drive power supply system 21 (i.e., the first master control module 13) and a secondary drive power supply system 23 (i.e., the second master control module 15); as shown in fig. 2, the power control circuit further includes: the first capacitor 24, the first inductor 25 and the second capacitor 26 form a low-pass filter, which can suppress common-mode EMI interference signals on the line. Here, the first inductor 25 is a common mode inductor, and has a function of filtering common mode electromagnetic interference signals in a circuit.
According to another aspect of the embodiment of the present invention, the power control circuit may further include: and the pi-type filter is connected with the vehicle-mounted power supply module and is used for smoothing harmonic waves in the vehicle-mounted low-voltage power supply provided for the first main control module and the second main control module.
Wherein, pi type filter includes: one end of the third capacitor is connected with the second capacitor, and the other end of the third capacitor is connected with the second inductor and the fourth capacitor; one end of the second inductor is connected with the third capacitor, and the other end of the second inductor is connected with the fourth capacitor; and one end of the fourth capacitor is connected with the second inductor, and the other end of the fourth capacitor is connected with the first main control module and/or the second main control module.
As shown in fig. 2, the power control circuit further includes: the third capacitor 27, the second inductor 28 and the fourth capacitor 29 form a pi-type filter for extracting multiple harmonics in the power supply to make the power supply smoother.
In the embodiment of the invention, the vehicle power supply module filters a low-voltage power supply (generally 24V, namely, a vehicle low-voltage power supply) from common-mode interference through a capacitor C1 (namely, a first capacitor), a common-mode inductor L1 (namely, a first inductor) and a capacitor C2 (namely, a second capacitor); then, the voltage is filtered by a capacitor C3 (i.e., a third capacitor), an inductor L2 (i.e., a second inductor) and a capacitor C4 (i.e., a fourth capacitor), and the filtered voltage is input to a main drive part (i.e., a main drive power supply system) and an auxiliary drive part (i.e., an auxiliary drive power supply system) on the control board.
According to an aspect of the embodiment of the present invention, the first master control module and the second master control module may respectively include: and the power conversion modules are used for converting the power received by the first main control module and the power received by the second main control module according to the power consumption requirements of the power consumption modules.
In one aspect, the plurality of power conversion modules on the first master control module may include: the first power supply conversion module is used for converting the received vehicle-mounted low-voltage power supply into a power supply required by a driving part of the first main control module and providing the converted power supply part for the driving part; and the second power supply conversion module is used for converting the received vehicle-mounted low-voltage power supply into a power supply required by the main drive rotary transformer circuit and providing the converted power supply part for the main drive rotary transformer circuit.
As shown in fig. 2, in the main drive power supply system, a vehicle-mounted low-voltage power supply (generally, a 24V input power supply) is converted into three power supplies, specifically, one power supply is a 24V-to-power supply 1 (that is, a first power supply conversion module, and the power supply 1 is generally 15V), and is mainly used for supplying power to a drive portion of a main drive; one path is a 24V-to-power supply 2 (namely, a second power supply conversion module, the power supply 2 is generally 15V or 12V) and is used for a rotary transformer decoding circuit, and the rotary transformer is mainly used for motor position measurement; and 24V to multi-channel power (i.e., the first multi-channel power conversion module).
In an optional embodiment, the plurality of power conversion modules on the first main control module further includes: the first power conversion module is used for converting the received power converted by the first power conversion module into a power required by level conversion while the first power conversion module provides the converted power to the driving part, and providing the converted power to a level; and the second power conversion module is used for converting the received power converted by the second power conversion module into the power required by the decoding core of the rotary transformer and/or the operational amplifier power supply circuit while providing the converted power for the main drive rotary transformer circuit by the second power conversion module, and providing the converted power for the decoding core of the rotary transformer and/or the operational amplifier power supply circuit.
In addition, another part of the 24V-to-power supply 1 is supplied with power by a level conversion part of a pulse switch control signal sent by the DSP, by a power supply 5 (i.e., realized by a first power conversion module, which is generally 5V) to which the power supply 1 is converted; the power supply 6 (generally 5V) is converted from the power supply 2 (i.e. the second power conversion module realizes the conversion from the power supply 2 to the power supply 6), and is mainly used for supplying power to the decoding chip and the part of the signal processing circuit.
In an optional embodiment, the plurality of power conversion modules on the first main control module may further include: first multichannel power conversion module for with the on-vehicle low voltage power distribution of received to many sub power module, wherein, a plurality of sub power module carry out power conversion based on the power consumption demand of a plurality of power module that correspond with first multichannel power conversion module, and a plurality of sub power module include: the first sub-power module is used for converting the vehicle-mounted low-voltage power distributed by the first multi-path power conversion module into power required by the current sensor and/or the signal processing circuit, the second sub-power module is used for converting the vehicle-mounted low-voltage power distributed by the first multi-path power conversion module into power required by the temperature sampling module and/or the bus communication module, and the third sub-power module is used for converting the vehicle-mounted low-voltage power distributed by the first multi-path power conversion module into power required by the DSP.
As shown in fig. 2, a 24V-to-multi-channel power supply outputs a multi-channel power supply through a multi-channel power supply chip, a power supply 9 and a power supply 10 (generally 5V) are mainly used for supplying power to circuits such as current sensor sampling, sensor signal processing circuit, temperature sampling, CAN communication and the like, and a power supply 11 (generally 3.3V) and a power supply 12 (generally 1.9V or 1.2V) are used for supplying power to peripheral and cores of a host driver DSP.
It should be noted that, in the embodiment of the present invention, the number of power supplies of the main driving portion may be increased or decreased according to the functional requirements.
In another aspect, the plurality of power conversion modules on the second master control module may include: the third power supply conversion module is used for converting the received vehicle-mounted low-voltage power supply into a power supply required by an oil pump driving circuit of the second main control module and providing the converted power supply part for the oil pump driving circuit; and the fourth power supply conversion module is used for converting the received vehicle-mounted low-voltage power supply into a power supply required by the air pump driving circuit and providing the converted power supply part for the air pump driving circuit.
As shown in fig. 2, in the auxiliary drive power supply system, a vehicle-mounted low-voltage power supply (generally, a 24V input power supply) is converted into three parts of power supplies, specifically, one part is a 24V conversion power supply 3 (that is, a third power supply conversion module, and the power supply 3 is generally 15V), and the auxiliary drive power supply system is mainly used for supplying power to the oil pump drive circuit system; one path is a 24V switching power supply 4 (namely, a fourth power supply conversion module, the power supply 4 is generally 15V), and the four-path power supply is mainly used for supplying power to an air pump driving circuit system; and 24V to multi-channel power (i.e., the second multi-channel power conversion module).
In an optional embodiment, the plurality of power conversion modules on the first main control module may further include: the third power conversion module is used for converting the received power converted by the third power conversion module into the power required by the oil pump driving level conversion and/or temperature sampling module while providing the converted power to the oil pump driving circuit by the third power conversion module, and providing the converted power to the oil pump driving level conversion and/or temperature sampling module; and the fourth power conversion module is used for converting the received power converted by the fourth power conversion module into the power required by air pump driving level conversion and/or temperature sampling while providing the converted power to the air pump driving circuit by the fourth power conversion module, and providing the converted power to the air pump driving level conversion and/or temperature sampling.
In addition, another part of the 24V-conversion power supply 3 is used by the power supply 7 (i.e. realized by a third power conversion module, generally 5V) converted by the power supply 3 to supply power to the level conversion part of the oil pump switching signal; the power supply 8 (generally 5V) is converted from the power supply 4 (i.e., the third power conversion module converts the power supply 4 into the power supply 8), and is mainly used for supplying power to the level conversion part of the air pump switching signal.
In addition, the plurality of power conversion modules on the first main control module further include: second multichannel power conversion module for with the on-vehicle low voltage power distribution of received to many sub power module, wherein, a plurality of sub power module carry out power conversion based on the power consumption demand of a plurality of power module that correspond with second multichannel power conversion module, a plurality of sub power module include: the system comprises a first sub-power module, a second sub-power module and a bus communication module, wherein the first sub-power module is used for converting a vehicle-mounted low-voltage power supply distributed by the first multi-path power conversion module into a power supply required by a current sensor and/or a signal processing circuit, the second sub-power module is used for converting the vehicle-mounted low-voltage power supply distributed by the first multi-path power conversion module into a power supply required by an oil pump and/or air pump temperature sampling module and the bus communication module, and the third sub-power module is used for converting the vehicle-mounted low-voltage power supply distributed by the first multi-path power conversion module into.
As shown in fig. 2, a 24V-to-multi-channel power supply outputs a multi-channel power supply through a multi-channel power supply chip, a power supply 13 and a power supply 14 (generally 5V) are mainly used for supplying power to circuits such as current sensor sampling, sensor signal processing circuit, temperature sampling, CAN communication and the like, and a power supply 15 (generally 3.3V) and a power supply 16 (generally 1.9V or 1.2V) are used for supplying power to peripheral and cores of a host driver DSP.
It should be noted that, similarly, the number of the power supplies of the auxiliary driving part can be increased or decreased according to the functional requirements.
According to the power supply control circuit provided by the embodiment of the invention, the main drive DSP and the auxiliary drive DSP are communicated in a Serial Peripheral Interface (SPI) mode. In the embodiment of the invention, the power supplies of the main drive part and the auxiliary drive part on the driver control board are designed independently and do not influence each other, the drive power supply and the rotary transformer power supply in the main drive part are designed independently and do not influence each other, and the power supplies of the oil pump and the air pump in the auxiliary drive part are designed independently and do not influence each other, so that the mutual crosstalk is reduced well; meanwhile, all parts of power are directly converted from input without being connected through a wire harness, and various filtering is performed at the input power, so that the anti-interference capability of the driver in a strong electromagnetic environment is improved. In addition, circuits with the same function are supplied with power in a centralized mode, and multiple paths of power outputs are used for supplying power to parts such as a DSP, a sampling circuit and communication, so that the power supply is simplified. The power distribution method is relatively simple and improves the electromagnetic compatibility and reliability of the drive as a whole.
In addition, compared with the scheme of the control power supply of the existing all-in-one driver, the scheme has low reliability and is easy to interfere in a strong electromagnetic environment, in the embodiment of the invention, a low-voltage input power supply in the all-in-one controller is filtered and then distributed to a main drive part and an auxiliary drive part on a control board, the power supply of the two parts is independent, the drive power supply of the main drive part is independent of a rotary power supply, and an oil pump and an air pump power supply of the auxiliary drive part are independent respectively; the driver has high reliability of a control power supply system, and the whole electromagnetic compatibility of the driver has good effect and high reliability. And the input power supply filters, the power supply of the main drive part and the power supply of the auxiliary drive part are respectively independent, the driving power supply of the main drive part and the rotary power supply are independent, and the power supply of the oil pump and the air pump of the auxiliary drive part are respectively and independently supplied, so that the reliability of the control power supply system of the driver is high, and the integral electromagnetic compatibility effect of the driver is good.
Example 2
According to another aspect of the embodiment of the invention, an electric vehicle using the power supply control circuit of any one of the above is also provided.
In the power control circuit in the embodiment of the invention, a control power system of the all-in-one driver is mainly divided into a main drive power system and an auxiliary drive power system, and the two power systems are similar. After being input to the all-in-one driver, a vehicle-mounted low-voltage direct-current power supply (24V power supply) is filtered by a capacitor, a common-mode inductor, an inductor and the like and then distributed to the main motor driving main control part and the auxiliary motor driving main control part. The main drive main control part mainly comprises three power supplies, wherein one power supply is supplied to an IGBT (insulated gate bipolar translator) drive circuit of the main drive part, the other power supply is used for supplying power to a decoding part of the rotary transformer, and the third power supply realizes multi-path power output through one-to-multi-path power supply chip and is mainly used for supplying power to parts of a main drive DSP (digital signal processor), current sampling, communication and the like; similarly, the control power supply system of the auxiliary drive part has three paths, one path is used for the oil pump drive system, the other path is used for the air pump drive system, and the third path realizes the multi-path power supply output through one-to-multi-path power supply chip and is used for the power supply of the auxiliary drive DSP, the signal sampling, the communication and other parts. Also, the number of power supplies may be increased or decreased as functional needs dictate. The power supplies of the main drive part and the auxiliary drive part on the driver control board are designed independently and do not influence each other, the driving power supply and the power supply of the rotary transformer in the main drive part are designed independently and do not influence each other, and the power supplies of the oil pump and the air pump in the auxiliary drive part are designed independently and do not influence each other, so that the crosstalk among circuits of all parts is reduced well; meanwhile, all parts of power are directly converted from input without being connected through a wire harness, and various filtering is performed at the input power, so that the anti-interference capability of the driver in a strong electromagnetic environment is improved. In addition, circuits with the same function are supplied with power in a centralized mode, and multiple paths of power outputs are used for supplying power to parts such as a DSP, a sampling circuit and communication, so that the power supply is simplified. The power distribution method is relatively simple and improves the overall electromagnetic compatibility and reliability of the drive.
In addition, on the control panel of the all-in-one driving controller, circuits with different functions are independently powered, and power supplies of the main driving part and the auxiliary driving part are independently designed and do not influence each other; the power supplies of the driving circuit and the rotary transformer circuit in the main driving part are independently designed and do not influence each other, and the power supplies of the oil pump circuit and the air pump circuit in the auxiliary driving part are independently designed and do not influence each other. In addition, circuits with the same function in the main drive part and the auxiliary drive part are used for supplying power in a centralized mode, and the number of power supplies is reduced. The distribution method of the control power supply is relatively simple, the mutual interference is well reduced, the anti-interference capability of the driver in the strong electromagnetic interference environment of the electric vehicle is improved, and the overall electromagnetic compatibility and the reliability of the all-in-one driver are improved.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (13)
1. A power supply control circuit, wherein the power supply control circuit is for an electric vehicle, comprising:
the vehicle-mounted power supply module is used for inputting a vehicle-mounted low-voltage power supply to the first main control module and the second main control module, wherein the first main control module is a control module of a driving circuit of a main motor, and the second main control module is a control module of a driving circuit of an auxiliary motor;
the first main control module is used for distributing a first low-voltage power supply to each power utilization module of the driving circuit of the main motor, wherein the first low-voltage power supply is a power supply input by the vehicle-mounted power supply module;
and the second main control module is used for distributing a second low-voltage power supply to each power utilization module of the driving circuit of the auxiliary motor, wherein the second low-voltage power supply is a power supply input by the vehicle-mounted power supply module.
2. The power control circuit of claim 1, further comprising: and the low-pass filter is connected with the vehicle-mounted power supply module and is used for inhibiting the common-mode interference signal of the vehicle-mounted low-voltage power supply before the vehicle-mounted low-voltage power supply is input into the first main control module and the second main control module.
3. The power control circuit of claim 2, wherein the low pass filter comprises:
one end of the first capacitor is connected with the vehicle-mounted power supply module, and the other end of the first capacitor is grounded;
one end of the first inductor is connected with the first capacitor, and the other end of the first inductor is connected with the second capacitor, wherein the first inductor is a common-mode inductor;
and one end of the second capacitor is connected with the first inductor, and the other end of the second capacitor is connected with the third capacitor.
4. The power control circuit of claim 1, further comprising: and the pi-type filter is connected with the vehicle-mounted power supply module and is used for smoothing the harmonic waves in the vehicle-mounted low-voltage power supply provided for the first main control module and the second main control module.
5. The power control circuit of claim 4, wherein the pi filter comprises:
one end of the third capacitor is connected with the second capacitor, and the other end of the third capacitor is connected with the second inductor and the fourth capacitor;
one end of the second inductor is connected with the third capacitor, and the other end of the second inductor is connected with the fourth capacitor;
one end of the fourth capacitor is connected with the second inductor, and the other end of the fourth capacitor is connected with the first main control module and/or the second main control module.
6. The power control circuit of claim 1, wherein the first master control module and the second master control module each comprise: and the power supply conversion modules are used for converting the power supplies received by the first main control module and the second main control module according to the power consumption requirements of the power consumption modules.
7. The power control circuit of claim 6, wherein the plurality of power conversion modules on the first master control module comprises:
the first power supply conversion module is used for converting the received vehicle-mounted low-voltage power supply into a power supply required by a driving part of the first main control module and providing the converted power supply part for the driving part;
and the second power supply conversion module is used for converting the received vehicle-mounted low-voltage power supply into a power supply required by the main drive rotary transformer circuit and providing the converted power supply part for the main drive rotary transformer circuit.
8. The power control circuit of claim 7, wherein the plurality of power conversion modules on the first master control module further comprises:
the first power conversion module is used for converting the received power converted by the first power conversion module into a power required by level conversion while the first power conversion module provides the converted power to the driving part, and providing the converted power to the level;
and the second power conversion module is used for converting the received power converted by the second power conversion module into a power required by a decoding core of a rotary transformer and/or an operational amplifier power supply circuit while providing the converted power for the main drive rotary transformer circuit by the second power conversion module, and providing the converted power for the decoding core of the rotary transformer and/or the operational amplifier power supply circuit.
9. The power control circuit of claim 7, wherein the plurality of power conversion modules on the first master control module further comprises:
the first multi-channel power conversion module is used for distributing the received vehicle-mounted low-voltage power to a plurality of sub power modules, wherein the plurality of sub power modules perform power conversion based on power requirements of a plurality of power utilization modules corresponding to the first multi-channel power conversion module, and the plurality of sub power modules comprise: the first sub-power module is used for converting the vehicle-mounted low-voltage power supply distributed by the first multi-path power supply conversion module into a power supply required by a current sensor and/or a signal processing circuit, the second sub-power module is used for converting the vehicle-mounted low-voltage power supply distributed by the first multi-path power supply conversion module into a power supply required by a temperature sampling module and/or a bus communication module, and the third sub-power module is used for converting the vehicle-mounted low-voltage power supply distributed by the first multi-path power supply conversion module into a power supply required by a Digital Signal Processor (DSP).
10. The power control circuit of claim 6, wherein the plurality of power conversion modules on the second master control module comprises:
the third power supply conversion module is used for converting the received vehicle-mounted low-voltage power supply into a power supply required by an oil pump driving circuit of the second main control module and providing a converted power supply part for the oil pump driving circuit;
and the fourth power supply conversion module is used for converting the received vehicle-mounted low-voltage power supply into a power supply required by the air pump driving circuit and providing the converted power supply part for the air pump driving circuit.
11. The power control circuit of claim 10, wherein the plurality of power conversion modules on the first master control module further comprises:
the third power conversion module is used for converting the received power converted by the third power conversion module into the power required by the oil pump driving level conversion and/or temperature sampling module while providing the converted power to the oil pump driving circuit, and providing the converted power to the oil pump driving level conversion and/or temperature sampling module;
and the fourth power conversion module is used for converting the received power converted by the fourth power conversion module into the power required by air pump driving level conversion and/or temperature sampling while providing the converted power for the air pump driving circuit, and providing the converted power for the air pump driving level conversion and/or temperature sampling.
12. The power control circuit of claim 10, wherein the plurality of power conversion modules on the first master control module further comprises:
a second multi-channel power conversion module, configured to distribute the received vehicle-mounted low-voltage power to a plurality of sub-power modules, where the plurality of sub-power modules perform power conversion based on power consumption requirements of a plurality of power consumption modules corresponding to the second multi-channel power conversion module, and the plurality of sub-power modules include: the system comprises a first multi-channel power supply conversion module, a second multi-channel power supply conversion module, a fourth sub power supply module, a fifth sub power supply module and a sixth sub power supply module, wherein the first sub power supply conversion module is used for converting a vehicle-mounted low-voltage power supply distributed by the second multi-channel power supply conversion module into a power supply required by a current sensor and/or a signal processing circuit, the fifth sub power supply module is used for converting the vehicle-mounted low-voltage power supply distributed by the second multi-channel power supply conversion module into a power supply required by an oil pump and/or air pump temperature sampling module and a bus communication module, and the sixth sub power supply module is used.
13. An electric vehicle using the power supply control circuit according to any one of claims 1 to 12.
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| CN201911168819.8A CN110884450A (en) | 2019-11-25 | 2019-11-25 | Power supply control circuit and electric automobile |
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| CN201911168819.8A CN110884450A (en) | 2019-11-25 | 2019-11-25 | Power supply control circuit and electric automobile |
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