CN112711286A - Voltage regulating circuit, voltage regulating control method, voltage regulating device, storage medium and vehicle - Google Patents
Voltage regulating circuit, voltage regulating control method, voltage regulating device, storage medium and vehicle Download PDFInfo
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- CN112711286A CN112711286A CN201911020884.6A CN201911020884A CN112711286A CN 112711286 A CN112711286 A CN 112711286A CN 201911020884 A CN201911020884 A CN 201911020884A CN 112711286 A CN112711286 A CN 112711286A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/561—Voltage to current converters
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Abstract
The invention provides a voltage regulating circuit, a voltage regulating control method, a voltage regulating device, a storage medium and a vehicle, wherein the voltage regulating circuit comprises: a first switching device, a first end and a second end of which are connected with the positive bus; a first end of the second switching device is connected with the third end of the first switching device, and a second end of the second switching device is connected with the negative bus; and a first end of the third switching device is connected with the negative bus, a second end of the third switching device is connected with a first end of the second switching device, and a third end of the third switching device is connected with a second end of the second switching device. If the power supply voltage of the power supply accords with the preset target voltage range, the conduction states of the first switching device and the third switching device can be adjusted, so that the voltage regulating circuit enters a bypass state, the voltage regulating circuit is not connected into the power supply loop any more, and energy waste caused by the voltage regulating circuit is avoided.
Description
Technical Field
The invention relates to the technical field of voltage regulating circuits, in particular to a voltage regulating circuit, a voltage regulating control method, a voltage regulating device, a computer readable storage medium and a vehicle.
Background
In the related art, if the power supply is an energy storage power supply such as a battery, the power supply voltage changes with the state of the power supply, and after the power supply voltage changes, the power supply voltage needs to be adjusted through a voltage regulating circuit. The working state of the traditional voltage regulating circuit is not controlled, and if the power supply voltage is in a stable and proper range, the voltage regulating circuit is still in the working state, and energy loss is caused.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the invention proposes a voltage regulation circuit.
The second aspect of the present invention provides a voltage regulation control method.
A third aspect of the invention provides a voltage regulating device.
A fourth aspect of the present invention is directed to a computer-readable storage medium.
A fifth aspect of the invention proposes a vehicle.
In view of the above, a first aspect of the present invention provides a voltage regulating circuit, including: a first switching device, a first end and a second end of which are connected with the positive bus; a first end of the second switching device is connected with the third end of the first switching device, and a second end of the second switching device is connected with the negative bus; and a first end of the third switching device is connected with the negative bus, a second end of the third switching device is connected with a first end of the second switching device, and a third end of the third switching device is connected with a second end of the second switching device.
In the technical scheme, the voltage regulating circuit comprises a first switching device, a second switching device and a third switching device, wherein the first switching device and the third switching device comprise multiple conduction modes, and the voltage regulating circuit can be effectively controlled by adjusting the conduction states of the first switching device and the third switching device so as to meet the operation requirement of a system.
In addition, the voltage regulating circuit in the above technical solution provided by the present invention may further have the following additional technical features:
in the above technical solution, the voltage regulating circuit further includes: the inductive device is connected in series with the positive bus; and one end of the capacitive element is connected with the positive bus, and the other end of the capacitive element is connected with the negative bus.
In the technical scheme, the inductive device and the capacitive device form an LC loop, so that filtering can be realized and the purity of a power supply signal is improved, and an LC booster circuit is formed to effectively boost when the power supply voltage is lower than a target voltage range, thereby meeting the load requirement.
In any of the above technical solutions, the voltage regulating circuit further includes: the first unidirectional conducting device is connected in series with the positive bus, the input end of the first unidirectional conducting device is connected with the inductive device and the first end of the first switching device, and the second end of the first unidirectional conducting device is connected with the second end of the second switching device; and the input end of the second one-way conduction device is connected with the negative bus, and the output end of the second one-way conduction device is connected with the input end of the inductive device.
In the technical scheme, the first one-way conduction device and the second one-way conduction device are connected with the bus line and the switch device, so that the working state of the voltage regulating circuit can be correspondingly changed when the first switch device and the third switch device are switched to be in the conduction state, and the power supply efficiency can be ensured under the condition that the working requirements of loads are met under different conditions of power supply voltage.
In any of the above solutions, the second switching device includes at least one of: insulated gate bipolar transistors, metal-oxide semiconductor field effect transistors, wide bandgap semiconductors.
In the technical scheme, the second switch device is a high-speed switch device, and specifically may include at least one of an insulated gate bipolar transistor, a metal-oxide semiconductor field effect transistor, and a wide bandgap semiconductor.
In any of the above technical solutions, the first switching device and the third switching device are single-pole double-throw relays.
In the technical scheme, the first switching device and the third switching device are low-speed switching devices, so that the hardware cost is low, the cost can be effectively saved, the switching loss is reduced, and the overall efficiency of the power supply circuit is improved.
In any one of the above technical solutions, the first switching device includes a first relay and a second relay, and the third switching device includes a third relay and a fourth relay, wherein: the first end of the first relay and the first end of the second relay are connected and formed into the first end of the first switching device, the second end of the first relay is formed into the second end of the first switching device, and the second end of the second relay is formed into the third end of the first switching device; the first terminal of the third relay and the first terminal of the fourth relay are connected and formed as the first terminal of the third switching device, the second terminal of the third relay is formed as the second terminal of the third switching device, and the second terminal of the fourth relay is formed as the third terminal of the third switching device.
In the technical scheme, the first switch device and the second switch device can be composed of a plurality of relays, so that the cost is further reduced, the existing voltage regulating circuit is not required to be redesigned, the design cost and the production difficulty are reduced, and the reliability of the voltage regulating circuit is further improved.
A second aspect of the present invention provides a voltage regulation control method for controlling a voltage regulation circuit provided in any one of the above technical solutions, where the voltage regulation control method includes: and collecting power supply voltage, and controlling the conduction mode of the first switching device and the third switching device according to the power supply voltage and a preset target voltage range.
In the technical scheme, in the operation process, the power supply voltage provided by the power supply is collected in real time, whether the power supply voltage meets a preset target voltage range is judged, and the conduction modes of the first switching device and the third switching device are controlled according to the judgment result so as to control the voltage regulating circuit to enter different working modes.
Specifically, if the power supply voltage of the power supply is lower than a preset target voltage range, the voltage regulating circuit is controlled to boost by adjusting the conduction states of the first switching device and the third switching device so as to meet the load requirement. If the power supply voltage of the power supply is higher than the preset target voltage range, the conducting states of the first switching device and the third switching device are adjusted to control the voltage regulating circuit to reduce the voltage so as to ensure the power supply safety. If the power supply voltage of the power supply accords with the preset target voltage range, the conduction states of the first switching device and the third switching device can be adjusted, so that the voltage regulating circuit enters a bypass state, the voltage regulating circuit is not connected to a power supply line any more, and energy waste caused by the voltage regulating circuit is avoided.
In the above technical solution, the step of controlling the conduction modes of the first switching device and the third switching device according to the supply voltage and the target voltage range corresponding to the load specifically includes: controlling the first end and the third end of the first switching device to be conducted and controlling the first end and the third end of the third switching device to be conducted on the basis of the condition that the power supply voltage is smaller than the target voltage range; controlling the first end and the second end of the first switching device to be conducted and controlling the first end and the second end of the third switching device to be conducted on the basis of the condition that the power supply voltage is larger than the target voltage range; and controlling the first terminal and the second terminal of the first switching device to be conducted and controlling the first terminal and the third terminal of the third switching device to be conducted based on the condition that the power supply voltage is in the target voltage range.
In the technical scheme, if the power supply voltage is smaller than the target voltage range, the first end and the third end of the first switching device are controlled to be conducted, the first end and the third end of the third switching device are controlled to be conducted, at the moment, the voltage regulating circuit enters a boosting mode, and the power supply voltage of the power supply is increased to the target voltage range so as to meet the load requirement.
If the power supply voltage is larger than the target voltage range, the first end and the second end of the first switching device are controlled to be conducted, the first end and the second end of the third switching device are controlled to be conducted, at the moment, the voltage regulating circuit enters a voltage reduction mode, the power supply voltage of the power supply is reduced to the target voltage range, and therefore power supply safety is guaranteed.
If the power supply voltage is in the target voltage range, the first end and the second end of the first switching device are controlled to be conducted, the first end and the third end of the third switching device are controlled to be conducted, the voltage regulating circuit enters a bypass state at the moment, the power supply signal of the power supply directly supplies power to the load, the voltage regulating circuit does not access the power supply loop at the moment, and energy waste caused by the voltage regulating circuit is avoided.
A third aspect of the invention provides a pressure regulating device comprising a memory configured to store a computer program; the processor is configured to execute a computer program to implement the voltage regulation control method provided in any of the above technical solutions, and therefore, the voltage regulation device includes all the beneficial effects of the voltage regulation control method provided in any of the above technical solutions, which are not described herein again.
A fourth aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the voltage regulation control method provided in any of the above technical solutions, and therefore, the computer-readable storage medium includes all the beneficial effects of the voltage regulation control method provided in any of the above technical solutions, which are not described herein again.
A fifth aspect of the invention provides a vehicle comprising: a battery pack; a motor; according to the voltage regulating circuit provided by any one of the technical schemes, the input end of the voltage regulating circuit is connected with the battery pack, and the output end of the voltage regulating circuit is connected with the motor; according to the voltage regulating device provided by any one of the technical schemes, the voltage regulating device is connected with the battery pack and the voltage regulating circuit. Therefore, the vehicle includes the voltage regulating circuit provided in any one of the above technical solutions, and all the advantages of the voltage regulating device provided in any one of the above technical solutions, which are not described herein again.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a block diagram of a voltage regulator circuit according to one embodiment of the invention;
FIG. 2 illustrates a supply signal diagram for a voltage regulator circuit operating in a boost mode according to one embodiment of the present invention;
FIG. 3 illustrates a graph of supply signals for a voltage regulator circuit operating in a buck mode according to one embodiment of the present invention;
FIG. 4 shows a block diagram of a voltage regulator circuit according to another embodiment of the invention;
FIG. 5 shows a flow diagram of a voltage regulation control method according to one embodiment of the invention;
FIG. 6 illustrates another flow diagram of a voltage regulation control method according to one embodiment of the present invention;
fig. 7 shows a block diagram of a voltage regulating device according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The voltage regulation circuit, the voltage regulation control method, the voltage regulation device, the computer-readable storage medium, and the vehicle according to some embodiments of the present invention are described below with reference to fig. 1 to 7.
The first embodiment is as follows:
in an embodiment of the first aspect of the present invention, as shown in fig. 1, there is provided a voltage regulating circuit, including:
a first switching device S1, a first terminal and a second terminal of the first switching device S1 being connected to the positive bus; a first end of the second switching device HS is connected with a third end of the first switching device S1, and a second end of the second switching device HS is connected with the negative bus; and a third switching device S2, a first terminal of the third switching device S2 is connected with the negative bus, a second terminal of the third switching device S2 is connected with a first terminal of the second switching device HS, and a third terminal of the third switching device S2 is connected with a second terminal of the second switching device HS.
In some embodiments, the voltage regulation circuit further comprises: the inductive device L is connected in series with the positive bus; and one end of the capacitive element C is connected with the positive bus, and the other end of the capacitive element C is connected with the negative bus.
In some embodiments, the voltage regulation circuit further comprises: the first unidirectional conducting device D1 is connected in series with the positive bus, the input end of the first unidirectional conducting device D1 is connected with the inductive device L and the first end of the first switching device S1, and the second end of the first unidirectional conducting device D1 is connected with the second end of the second switching device HS; and the input end of the second unidirectional conducting device D2 is connected with the negative bus, and the output end of the second unidirectional conducting device D2 is connected with the input end of the inductive device L.
In some embodiments, the second switching device HS comprises at least one of: insulated gate bipolar transistors, metal-oxide semiconductor field effect transistors, wide bandgap semiconductors.
In some embodiments, the first switching device S1 and the third switching device S2 are single pole double throw relays.
In this embodiment, if the power supply voltage is lower than the preset target voltage range, the voltage regulating circuit is controlled to boost by adjusting the conducting states of the first switching device S1 and the third switching device S2 to meet the load requirement. If the power supply voltage of the power supply is higher than the preset target voltage range, the conducting states of the first switching device S1 and the third switching device S2 are adjusted to control the voltage regulating circuit to reduce the voltage so as to ensure the power supply safety. If the power supply voltage of the power supply meets the preset target voltage range, the voltage regulating circuit can enter a bypass state by adjusting the conduction states of the first switching device S1 and the third switching device S2, the voltage regulating circuit is not connected to a power supply loop any more at the moment, and energy waste caused by the voltage regulating circuit is avoided.
When the voltage regulating circuit enters a bypass state, the second switching element is disconnected from the booster circuit, the switching state of the second switching element does not affect the current trend in the voltage regulating circuit, and the voltage regulating circuit does not change the voltage value of the power supply input electric signal. At this time, the voltage regulating circuit in the bypass state is equivalent to a "wire", i.e., the power supply directly supplies power to the load.
The inductive device L and the capacitive device C form an LC loop, so that on one hand, filtering can be realized, and the purity of a power supply signal is improved, and on the other hand, an LC booster circuit is formed, so that boosting is effectively performed when the power supply voltage is lower than a target voltage range, and the load requirement is met.
The first unidirectional conducting device D1 and the second unidirectional conducting device D2 are connected with a bus line and a switching device, so that the working state of the voltage regulating circuit can be correspondingly changed when the first switching device S1 and the third switching device S2 are switched to be in a conducting state, and further the power supply efficiency can be guaranteed under the condition that the working requirements of loads are met under different conditions of power supply voltage.
The second switching device HS is a high-speed switching device, and may specifically include at least one of an insulated gate bipolar transistor, a metal-oxide semiconductor field effect transistor, and a wide bandgap semiconductor.
The first switching device S1 is a low-speed switching device, which can effectively save cost, reduce switching loss, and improve the overall efficiency of the power supply circuit.
Specifically, the operating states of the voltage regulating circuit include a step-up state, a step-down state, and a bypass state, wherein in each operating state, the first switching device S1 and the third switching device S2 are turned on as shown in table 1:
TABLE 1
| Step-up | Reducing blood pressure | Bypass path | |
| First switching device S1 | Terminal 1-terminal 3 | Terminal 1- |
Terminal 1- |
| Third switching device S2 | Terminal 1-terminal 3 | Terminal 1- |
Terminal 1-terminal 3 |
When the voltage regulator circuit operates in the boost mode, the waveforms of the input electrical signal and the output electrical signal of the voltage regulator circuit are as shown in fig. 2.
When the voltage regulator circuit operates in the buck mode, the waveforms of the input electrical signal and the output electrical signal of the voltage regulator circuit are as shown in fig. 3.
By applying the embodiment of the invention, according to different power supply conditions of the power supply, specifically, the relation between the power supply voltage and the preset target voltage range, the first switching device S1 and the third switching device S2 are controlled to be conducted in different ways, so that the voltage regulating circuit changes the operation state according to the power supply state, on one hand, the power supply voltage can be ensured to always meet the load requirement, on the other hand, the power supply safety can be ensured, on the other hand, the energy waste caused by the loss of the voltage regulating circuit and the switch can be avoided when the power supply voltage meets the target voltage range, and the power supply efficiency is improved.
Example two:
as shown in fig. 4, in one embodiment of the present invention, the first switching device S1 includes a first relay S3 and a second relay S4, and the third switching device S2 includes a third relay S5 and a fourth relay S6, wherein: a first terminal of the first relay S3 and a first terminal of the second relay S4 are connected and formed as a first terminal of the first switching device S1, a second terminal of the first relay S3 is formed as a second terminal of the first switching device S1, and a second terminal of the second relay S4 is formed as a third terminal of the first switching device S1; a first end of the third relay S5 and a first end of the fourth relay S6 are connected and formed as a first end of the third switching device S2, a second end of the third relay S5 is formed as a second end of the third switching device S2, and a second end of the fourth relay S6 is formed as a third end of the third switching device S2.
In this embodiment, the first switching device S1 and the second switching device HS may be composed of a plurality of relays, which further reduces the cost, and does not require redesign of the existing voltage regulating circuit, reduces the design cost and the manufacturing difficulty, and further increases the reliability of the voltage regulating circuit.
Specifically, the operating states of the voltage regulating circuit include a step-up state, a step-down state, and a bypass state, wherein in each of the operating states, the conduction mode of each relay in the first switching device S1 and the third switching device S2 is as shown in table 2:
TABLE 2
| Step-up | Reducing blood pressure | Bypass path | |
| |
1 | 0 | X |
| |
1 | 0 | 1 |
| |
0 | 1 | 0 |
| |
0 | 1 | 1 |
In table 2, 1 represents on, 0 represents off, and X represents no change.
Example three:
in one embodiment of the invention, for the case that the application scenario is an electric vehicle, the electric vehicle is powered by a battery, the power supply voltage of the electric vehicle is greatly changed along with the state of the battery, and the electric vehicle is uncontrollable, and the efficiency of the electric equipment is not optimal. In order to increase the efficiency of the consumer, a controlled dc bus voltage is required within a certain range.
Conventional voltage regulating circuits, such as DCDC (direct current-direct current) conversion circuits, require a complicated circuit structure to realize voltage step-up and step-down, and require more than one high-speed switching device, which not only increases the cost, but also increases the loss of the circuit and reduces the overall efficiency.
In addition, in a charging and discharging period, the battery voltage is in a slow change process, and when the battery supply voltage can meet the requirements of electric equipment for a long time, the conventional DCDC conversion circuit is still in a working state, so that the battery energy is wasted without end.
In the embodiment of the invention, as shown in fig. 1, the voltage regulating circuit comprises a high-speed switching device, an inductor, a capacitor, two diodes and four low-speed switching devices, and realizes the operations of voltage boosting, voltage reducing and bypass. The three working modes are realized by controlling the on and off of the low-speed switching device.
Specifically, the voltage regulating circuit comprises a high-speed switching device (HS), an inductor (L), a capacitor (C), two diodes (D1, D2) and two low-speed switching devices (S1, S2), and realizes the boosting, the voltage reduction and the bypass operation. The three operation modes are realized by controlling the on and off of the low-speed switching devices (S1, S2).
When the battery voltage is lower than the required direct current bus voltage, the first switching device S1 and the third switching device S2 are controlled to connect the terminal 1 and the terminal 3, and the circuit works in a boosting state. When the battery voltage is higher than the required direct current bus voltage, the first switching device S1 and the third switching device S2 are controlled to be connected with the terminal 1 and the terminal 2, and the circuit works in a voltage reduction state. When the battery voltage is in the required direct current bus voltage range, the first switching device S1 is controlled to be connected with the terminal 1 and the terminal 2, and the third switching device S2 is controlled to be connected with the terminal 1 and the terminal 3, so that the battery works in a bypass state.
In some embodiments, as shown in fig. 4, the voltage regulating circuit includes: the high-speed switching device, the inductor, the capacitor, the two diodes and the four low-speed switching devices realize the boosting, voltage reduction and bypass operation. The three working modes are realized by controlling the on and off of the low-speed switching device.
Specifically, the high-speed switching device (HS), the inductor (L), the capacitor (C), the two diodes (D1, D2) and the four low-speed switching devices (S1-S4) are included, and the boost, buck and bypass operations are realized. The three operation modes are realized by controlling the on and off of the low-speed switching devices (S1-S4).
When the battery voltage is lower than the required direct current bus voltage, the control switches are turned on by the third relay S5 and the fourth relay S6, and the third relay S5 and the fourth relay S6 are turned off to work in a boosting state. When the battery voltage is higher than the required direct current bus voltage, the control switch third relay S5 and the fourth relay S6 are switched on, the first relay third relay S5 and the second relay fourth relay S6 are switched off, and at the moment, the voltage regulating circuit works in a voltage reduction state.
The boost state and buck state control logic are inverted. When the voltage of the battery is in the required direct-current bus voltage range, the control switch is used for switching on the fourth relay S6 and the fourth relay S6, the third relay S5 is switched off, and the voltage regulating circuit works in a bypass state at the moment, so that power is not consumed, and the efficiency is improved.
Example four:
in one embodiment of the present invention, as shown in fig. 1, there is provided a voltage regulating circuit comprising:
and the bus line comprises a positive bus and a negative bus.
The inductive device L and the first unidirectional conducting device D1 are connected in series with the positive bus, the input end of the inductive device L is formed as the input end of the voltage regulating circuit, the output end of the inductive device L is connected with the input end of the first unidirectional conducting device D1, and the output end of the first unidirectional conducting device D1 is formed as the output end of the voltage regulating circuit.
And a first end of the capacitive device C is connected to the positive bus and is connected with the output end of the first one-way conduction element, and a second end of the capacitive device C is connected to the negative bus.
A first switching device S1, a second switching device HS, and a third switching device S2, wherein the first switching device S1 and the third switching device S2 are single pole double throw relays.
The first end and the second end of the first switch device S1 are connected to the positive bus, and are respectively located at two ends of the first unidirectional conducting device D1, and the third end of the first switch device S1 is connected to the first end of the second switch device HS.
The first terminal of the first switching device S1 is a fixed terminal, and the first terminal of the first switching device S1 can be conductive with the second terminal of the first switching device S1 or the third terminal of the first switching device S1.
The first end of the second switching device HS is connected to the third end of the first switching device S1, and the second end of the second switching device HS is connected to the negative bus. The second switching device HS is a high speed switching device.
A first terminal of the third switching device S2 is connected to the negative bus, a second terminal of the third switching device S2 is connected to a first terminal of the second switching device HS, and a third terminal of the third switching device S2 is connected to a second terminal of the second switching device HS.
The first terminal of the third switching device S2 is a fixed terminal, and the first terminal of the third switching device S2 can be conductive with the second terminal of the third switching device S2 or the third terminal of the third switching device S2.
The input end of the second unidirectional conducting device D2 is connected to the negative bus and connected to the first end of the third switching device S2, and the output end of the second unidirectional conducting device D2 is connected to the positive bus and connected to the input end of the inductive element.
In some embodiments, as shown in fig. 4, the first switching device S1 includes a first relay S3 and a second relay S4, and the third switching device S2 includes a third relay S5 and a fourth relay S6, wherein:
the first relay S3, the second relay S4, the third relay S5, and the fourth relay S6 are single-pole, single-throw switches.
A first terminal of the first relay S3 and a first terminal of the second relay S4 are connected and formed as a first terminal of the first switching device S1, a second terminal of the first relay S3 is formed as a second terminal of the first switching device S1, and a second terminal of the second relay S4 is formed as a third terminal of the first switching device S1;
a first end of the third relay S5 and a first end of the fourth relay S6 are connected and formed as a first end of the third switching device S2, a second end of the third relay S5 is formed as a second end of the third switching device S2, and a second end of the fourth relay S6 is formed as a third end of the third switching device S2.
In practical applications, if the power supply voltage of the power supply is lower than the preset target voltage range, the voltage regulating circuit is controlled to boost by adjusting the conduction states of the first switching device S1 and the third switching device S2, so as to meet the load requirement. If the power supply voltage of the power supply is higher than the preset target voltage range, the conducting states of the first switching device S1 and the third switching device S2 are adjusted to control the voltage regulating circuit to reduce the voltage so as to ensure the power supply safety. If the power supply voltage of the power supply meets the preset target voltage range, the voltage regulating circuit can enter a bypass state by adjusting the conduction states of the first switching device S1 and the third switching device S2, the voltage regulating circuit is not connected to a power supply loop any more at the moment, and energy waste caused by the voltage regulating circuit is avoided.
Example five:
as shown in fig. 5, in an embodiment of the present invention, there is provided a voltage regulation control method for controlling a voltage regulation circuit provided in any one of the above embodiments, the voltage regulation control method including:
s502, collecting power supply voltage;
and S504, controlling the conduction modes of the first switching device and the third switching device according to the power supply voltage and the preset target voltage range.
In some embodiments, as shown in fig. 6, the step of controlling the conduction modes of the first switching device and the third switching device according to the target voltage ranges corresponding to the supply voltage and the load specifically includes:
s602, controlling the first end and the third end of the first switching device to be conducted and controlling the first end and the third end of the third switching device to be conducted on the basis of the condition that the power supply voltage is smaller than the target voltage range;
s604, controlling the first end and the second end of the first switching device to be conducted and controlling the first end and the second end of the third switching device to be conducted on the basis of the condition that the power supply voltage is larger than the target voltage range;
and S606, controlling the first end and the second end of the first switching device to be conducted and controlling the first end and the third end of the third switching device to be conducted based on the condition that the power supply voltage is in the target voltage range.
In the embodiment, in the operation process, the power supply voltage provided by the power supply is collected in real time, whether the power supply voltage meets a preset target voltage range is judged, and the conduction modes of the first switching device and the third switching device are controlled according to the judgment result so as to control the voltage regulating circuit to enter different working modes.
Specifically, if the power supply voltage of the power supply is lower than a preset target voltage range, the voltage regulating circuit is controlled to boost by adjusting the conduction states of the first switching device and the third switching device so as to meet the load requirement. If the power supply voltage of the power supply is higher than the preset target voltage range, the conducting states of the first switching device and the third switching device are adjusted to control the voltage regulating circuit to reduce the voltage so as to ensure the power supply safety. If the power supply voltage of the power supply accords with the preset target voltage range, the conduction states of the first switching device and the third switching device can be adjusted, so that the voltage regulating circuit enters a bypass state, the voltage regulating circuit is not connected to a power supply line any more, and energy waste caused by the voltage regulating circuit is avoided.
If the power supply voltage is smaller than the target voltage range, the first end and the third end of the first switching device are controlled to be conducted, the first end and the third end of the third switching device are controlled to be conducted, the voltage regulating circuit enters a boosting mode at the moment, and the power supply voltage of the power supply is increased to the target voltage range so as to meet the load requirement.
If the power supply voltage is larger than the target voltage range, the first end and the second end of the first switching device are controlled to be conducted, the first end and the second end of the third switching device are controlled to be conducted, at the moment, the voltage regulating circuit enters a voltage reduction mode, the power supply voltage of the power supply is reduced to the target voltage range, and therefore power supply safety is guaranteed.
If the power supply voltage is in the target voltage range, the first end and the second end of the first switching device are controlled to be conducted, the first end and the third end of the third switching device are controlled to be conducted, the voltage regulating circuit enters a bypass state at the moment, the power supply signal of the power supply directly supplies power to the load, the voltage regulating circuit does not access the power supply loop at the moment, and energy waste caused by the voltage regulating circuit is avoided.
In the case where the first switching device and the third switching device are single-pole double-throw relays, as shown in fig. 1, the conduction modes of the first switching device and the third switching device are shown in table 3:
TABLE 3
| Step-up | Reducing blood pressure | Bypass path | |
| First switching device S1 | Terminal 1-terminal 3 | Terminal 1- |
Terminal 1- |
| Third switching device S2 | Terminal 1-terminal 3 | Terminal 1- |
Terminal 1-terminal 3 |
As shown in fig. 4, the first switching device includes a first relay and a second relay, the second switching device includes a third relay and a fourth relay, and the on-state of the relays is as shown in table 4:
TABLE 4
| Step-up | Reducing blood pressure | Bypass path | |
| |
1 | 0 | X |
| |
1 | 0 | 1 |
| |
0 | 1 | 0 |
| |
0 | 1 | 1 |
In table 4, 1 represents on, 0 represents off, and X represents no change.
According to the different power supply conditions of the power supply, specifically the relation between the power supply voltage and the preset target voltage range, the first switching device and the third switching device are controlled to be conducted in different modes, so that the voltage regulating circuit changes the operation state aiming at the power supply state, on one hand, the power supply voltage can be guaranteed to always meet the load requirement, on the other hand, the power supply safety can be guaranteed, on the other hand, the energy waste caused by the voltage regulating circuit and the switching loss can be avoided when the power supply voltage accords with the target voltage range, and the power supply efficiency is improved.
Example six:
as shown in fig. 7, in one embodiment of the present invention, there is provided a voltage regulating device 700 comprising a memory 702 and a processor 704, the memory 702 being configured to store a computer program; the processor 704 is configured to execute a computer program to implement the voltage regulation control method provided in any of the above embodiments, and therefore, the voltage regulation apparatus includes all the advantages of the voltage regulation control method provided in any of the above embodiments, which are not described herein again.
Example seven:
in an embodiment of the present invention, a computer-readable storage medium is provided, on which a computer program is stored, and the computer program, when executed by a processor, implements the voltage regulation control method provided in any of the above embodiments, so that the computer-readable storage medium includes all the beneficial effects of the voltage regulation control method provided in any of the above embodiments, and is not described herein again.
Example eight:
in one embodiment of the present invention, there is provided a vehicle including: a battery pack; a motor; according to the voltage regulating circuit provided by any one of the embodiments, the input end of the voltage regulating circuit is connected with the battery pack, and the output end of the voltage regulating circuit is connected with the motor; as provided in any of the above embodiments, the voltage regulating device is connected to the battery pack and the voltage regulating circuit. Therefore, the vehicle includes the voltage regulating circuit provided in any one of the embodiments as described above, and the whole beneficial effects of the voltage regulating device provided in any one of the embodiments as described above are not described herein again.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically defined, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred apparatus or device must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A voltage regulation circuit, comprising:
a first switching device, a first terminal and a second terminal of which are connected to a positive bus;
a first end of the second switching device is connected with a third end of the first switching device, and a second end of the second switching device is connected with a negative bus;
and a first end of the third switching device is connected with the negative bus, a second end of the third switching device is connected with a first end of the second switching device, and a third end of the third switching device is connected with a second end of the second switching device.
2. The voltage regulation circuit of claim 1, further comprising:
the inductive device is connected in series with the positive bus, and the first end and the second end of the first switching device are positioned on the same side of the inductive device;
and one end of the capacitive element is connected with the positive bus, and the other end of the capacitive element is connected with the negative bus.
3. The voltage regulation circuit of claim 2, further comprising:
the first unidirectional conducting device is connected in series with the positive bus, the input end of the first unidirectional conducting device is connected with the inductive device and the first end of the first switching device, and the second end of the first unidirectional conducting device is connected with the second end of the first switching device;
and the input end of the second one-way conduction device is connected with the negative bus, and the output end of the second one-way conduction device is connected with the input end of the inductive device.
4. The voltage regulation circuit of any one of claims 1 to 3, wherein the second switching device comprises at least one of:
insulated gate bipolar transistors, metal-oxide semiconductor field effect transistors, wide bandgap semiconductors.
5. The voltage regulation circuit of any one of claims 1 to 3, wherein the first switching device and the third switching device are single pole double throw relays.
6. The voltage regulation circuit of any one of claims 1 to 3,
the first switching device includes a first relay and a second relay, and the third switching device includes a third relay and a fourth relay, wherein:
a first terminal of the first relay and a first terminal of the second relay are connected and formed as a first terminal of the first switching device, a second terminal of the first relay is formed as a second terminal of the first switching device, and a second terminal of the second relay is formed as a third terminal of the first switching device;
a first terminal of the third relay and a first terminal of the fourth relay are connected and formed as a first terminal of the third switching device, a second terminal of the third relay is formed as a second terminal of the third switching device, and a second terminal of the fourth relay is formed as a third terminal of the third switching device.
7. A voltage regulation control method for controlling the voltage regulation circuit according to any one of claims 1 to 6, characterized by comprising:
collecting power supply voltage, and controlling the conduction mode of the first switching device and the third switching device according to the power supply voltage and a preset target voltage range.
8. The voltage regulation control method according to claim 7, wherein the step of controlling the conduction modes of the first switching device and the third switching device according to the supply voltage and a target voltage range corresponding to a load specifically comprises:
controlling the first end and the third end of the first switching device to be conducted and controlling the first end and the third end of the third switching device to be conducted on the basis of the condition that the power supply voltage is smaller than the target voltage range;
controlling the first end and the second end of the first switching device to be conducted and controlling the first end and the second end of the third switching device to be conducted on the basis of the condition that the power supply voltage is larger than the target voltage range;
and controlling the first end and the second end of the first switching device to be conducted and controlling the first end and the third end of the third switching device to be conducted on the basis of the condition that the power supply voltage is in the target voltage range.
9. A pressure regulating apparatus, comprising:
a memory configured to store a computer program;
a processor configured to execute the computer program to implement the voltage regulation control method of claim 7 or 8.
10. A computer-readable storage medium, on which a computer program is stored, the computer program, when being executed by a processor, implementing the voltage regulation control method according to claim 7 or 8.
11. A vehicle, characterized by comprising:
a battery pack;
a motor;
the voltage regulating circuit according to any one of claims 1 to 6, wherein an input end of the voltage regulating circuit is connected with the battery pack, and an output end of the voltage regulating circuit is connected with the motor;
the voltage regulation device of claim 9, said voltage regulation device being connected to said battery pack and said voltage regulation circuit.
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| CN113765382A (en) * | 2021-09-14 | 2021-12-07 | 湖南麦格米特电气技术有限公司 | Buck-boost working circuit, control method thereof and switching power supply |
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| CN112711286B (en) | 2022-02-25 |
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