CN216118451U - Accelerator power supply voltage selection circuit - Google Patents
Accelerator power supply voltage selection circuit Download PDFInfo
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- CN216118451U CN216118451U CN202122485154.2U CN202122485154U CN216118451U CN 216118451 U CN216118451 U CN 216118451U CN 202122485154 U CN202122485154 U CN 202122485154U CN 216118451 U CN216118451 U CN 216118451U
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Abstract
The utility model relates to a power supply voltage selection circuit of an accelerator, which comprises a first input power supply selection circuit, a second input power supply selection circuit and a third input power supply. Signals of the first power supply control unit and the second power supply control unit are all derived from the MCU, the diodes D1, D2 and D3 play a role in voltage selection at the same time, when two or three input power supplies are all output to the output power supply, only the input power supply with the highest voltage is output to the output power supply, and the accelerator power supply voltage selection is completed by the cooperation of the triode, the resistor, the diode and the MCU. The circuit is composed of conventional elements, has a simple structure and low cost, can save power supply interfaces compared with the conventional accelerator power supply scheme, and can avoid damage of the accelerator due to power supply overvoltage caused by wiring errors.
Description
Technical Field
The utility model belongs to the technical field of electric vehicle application, and particularly relates to an accelerator power supply voltage selection circuit.
Background
In practical applications, such as the application of electric vehicles, the accelerator is mainly used for controlling the speed of the vehicle, and the power supply of the accelerator is generally provided by a motor controller. At present, the power supply voltage of an accelerator in practical application generally has multiple specifications, commonly used are 5V, 12V and battery voltage, and in order to have better applicability, a motor controller generally provides two or three accelerator power supply interfaces for a user to select wiring at the same time. The application provides an accelerator power supply voltage selection circuit, adopts conventional component to constitute, simple structure, and the cost is lower, only needs to provide an accelerator power supply interface. Compared with the conventional accelerator power supply scheme, the accelerator power supply method can save power supply interfaces and can avoid damage to the accelerator due to power overvoltage caused by wiring errors.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems and provides an accelerator power supply voltage selection circuit which uses a triode, a resistor, a diode and an MCU (microprogrammed control Unit) to complete accelerator power supply voltage selection, and has the advantages of simple structure and lower cost.
In order to achieve the purpose, the utility model provides the following technical scheme: an accelerator power supply voltage selection circuit comprises an input power supply one selection circuit, an input power supply two selection circuit and an input power supply three, wherein the input power supply one selection circuit comprises a triode Q1, a triode Q2, a diode D1, resistors R1, R2, R3 and R4, the input power supply one is connected with an emitter of a triode Q1, a collector of the triode Q1 is connected with an anode of a diode D1, a cathode of the diode D1 is connected with an output power supply, a resistor R1 is connected with an emitter and a base of a triode Q1, a resistor R2 is connected with a base of a triode Q1 and a collector of the triode Q2, an emitter of the triode Q2 is grounded, one end of a resistor R3 is connected with a power supply control one, the other end of the resistor R2 is connected with a base of the triode Q2, one end of a resistor R4 is connected with a base of a triode Q2, and the other end of the resistor Q2 is connected with the ground; the input power supply two-selection circuit comprises a triode Q3, a triode Q4, a diode D2, resistors R5, R6, R7 and R8, the input power supply two is connected with an emitter of the triode Q3, a collector of the triode Q3 is connected with an anode of the diode D2, a cathode of the diode D2 is connected with an output power supply, a resistor R5 is connected with an emitter and a base of the triode Q3, the resistor R6 is connected with a base of the triode Q3 and a collector of the triode Q4, an emitter of the triode Q4 is grounded, one end of a resistor R7 is connected with a power supply control two, the other end of the resistor R8 is connected with a base of the Q4, and the other end of the resistor R8 is connected with an emitter of the Q4 and grounded; the input power supply is connected with the anode of the diode D3, and the cathode of the diode D3 is connected with the output power supply.
Further: signals of the power supply control I and the power supply control II are both from the MCU;
further: the transistor Q1 and the transistor Q3 both use PNP type transistors, and the transistor Q2 and the transistor Q4 both use NPN type transistors;
further: the diodes D1, D2 and D3 simultaneously play a role in voltage selection, and only output the input power supply with the highest voltage to the output power supply when two or three input power supplies are all output to the output power supply.
Compared with the prior art, the utility model has the beneficial effects that:
a power supply voltage selection circuit of an accelerator comprises a first input power supply selection circuit, a second input power supply selection circuit and a third input power supply. Signals of the first power supply control unit and the second power supply control unit are all derived from the MCU, the diodes D1, D2 and D3 play a role in voltage selection at the same time, when two or three input power supplies are all output to the output power supply, only the input power supply with the highest voltage is output to the output power supply, and the accelerator power supply voltage selection is completed by the cooperation of the triode, the resistor, the diode and the MCU. The circuit is composed of conventional elements, has a simple structure and low cost, can save power supply interfaces compared with the conventional accelerator power supply scheme, and can avoid damage of the accelerator due to power supply overvoltage caused by wiring errors.
Drawings
In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings needed to be used in the description of the embodiment will be briefly introduced below, it is obvious that the drawings in the following description are only for more clearly illustrating the embodiment of the present invention or the technical solution in the prior art, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an overall circuit diagram of the present invention;
fig. 2 is a circuit diagram of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood and implemented by those skilled in the art, the present invention is further described with reference to the following specific examples, which are provided for illustration only and are not intended to limit the present invention.
The accelerator power supply voltage selection circuit shown in fig. 1 comprises an input power supply one-selection circuit, an input power supply two-selection circuit and an input power supply three, wherein the input power supply one-selection circuit comprises a triode Q1, a triode Q2, a diode D1, resistors R1, R2, R3 and R4, the input power supply one-selection circuit is connected with an emitter of a triode Q1, a collector of the triode Q1 is connected with an anode of a diode D1, a cathode of the diode D1 is connected with an output power supply, a resistor R1 is connected with an emitter and a base of a triode Q1, a resistor R2 is connected with a base of a triode Q1 and a collector of the triode Q2, an emitter of the triode Q2 is grounded, one end of a resistor R3 is connected with a power supply control one, the other end of the resistor R2 is connected with a base of the triode Q2, one end of a resistor R4 is connected with a base of a triode Q2, and the other end of the resistor Q2 is connected with the ground; the input power supply two-selection circuit comprises a triode Q3, a triode Q4, a diode D2, resistors R5, R6, R7 and R8, the input power supply two is connected with an emitter of the triode Q3, a collector of the triode Q3 is connected with an anode of the diode D2, a cathode of the diode D2 is connected with an output power supply, a resistor R5 is connected with an emitter and a base of the triode Q3, the resistor R6 is connected with a base of the triode Q3 and a collector of the triode Q4, an emitter of the triode Q4 is grounded, one end of a resistor R7 is connected with a power supply control two, the other end of the resistor R8 is connected with a base of the Q4, and the other end of the resistor R8 is connected with an emitter of the Q4 and grounded; the input power supply is connected with the anode of the diode D3, and the cathode of the diode D3 is connected with the output power supply.
And the signals of the first power supply control and the second power supply control are both from the MCU.
The transistors Q1 and Q3 are PNP transistors, and the transistors Q2 and Q4 are NPN transistors.
The diodes D1, D2 and D3 simultaneously play a role in voltage selection, and only output the input power supply with the highest voltage to the output power supply when two or three input power supplies are all output to the output power supply.
Working principle/process:
when the output power supply needs to select one input power supply, the MCU sets a power supply control level to be a high level, the base electrode of the triode Q2 is conducted, the triode Q2 provides current for the base electrode of the triode Q1 through a resistor R2, the triode Q1 is conducted, and the first input power supply is output to the output power supply through a triode Q1 and a diode D1; when the output power supply needs to select the input power supply II, the MCU sets the power supply control level II to be a high level, the base electrode of the triode Q4 is conducted, the triode Q4 provides current for the base electrode of the triode Q3 through a resistor R6, the triode Q3 is conducted, and the input power supply II is output to the output power supply through a triode Q3 and a diode D2; when the first input power supply and the second input power supply are not selected, the third input power supply is output to the output power supply through the diode D3. The diodes D1, D2, D3 simultaneously function as voltage selection, and when two or three input power supplies are all output to the output power supply, only the input power supply with the highest voltage is output to the output power supply.
As shown in fig. 2, the application circuit diagram of the present invention, specifically, the accelerator power supply voltage selection application circuit on an electric vehicle, the accelerator power supply has three sources, namely, battery voltages of 48V, 12V and 5V, NPN transistors Q2 and Q4 of MMBT5551, and PNP transistors Q1 and Q3 of MMBT5401, and only one accelerator power interface is provided for a user, and the accelerator power output of 48V, 12V or 5V can be selected by an MCU. When the accelerator power supply needs to select 48V, the MCU sets the signal level of 48V _ MCU to high level, the base of a triode Q2 is conducted, a resistor R2 is used for providing current for the base of a triode Q1 by Q2, Q1 is conducted, and 48V is output to the accelerator power supply through a Q1 and a diode D1; when the accelerator power supply needs to select 12V, the MCU sets the level of 12V _ MCU to high level, the base of a triode Q4 is conducted, a resistor R6 is used for providing current for the base of a triode Q3 by Q4, Q3 is conducted, and 12V is output to the accelerator power supply through Q3 and a diode D2; when neither 48V nor 12V is selected, 5V is output to the accelerator power supply via diode D3.
In the application, the selection of the power supply voltage of the accelerator is completed by matching the triode, the diode, the resistor and the MCU.
The details of the present invention not described in detail are prior art.
The foregoing is only a preferred embodiment of the present invention and is not limited to the description and implementation. All equivalent changes or modifications of the structure, features and principles described in the claims of the present invention should be included in the scope of the present invention.
Claims (4)
1. A kind of accelerator supply voltage selective circuit, including input power one selective circuit, input power two selective circuits and input power three, characterized by that: the input power supply one-selection circuit comprises a triode Q1, a triode Q2, a diode D1, resistors R1, R2, R3 and R4, wherein the input power supply one end is connected with an emitter of the triode Q1, a collector of the triode Q1 is connected with an anode of the diode D1, a cathode of the diode D1 is connected with an output power supply, a resistor R1 is connected with an emitter and a base of the triode Q1, the resistor R2 is connected with a base of the triode Q1 and a collector of the triode Q2, an emitter of the triode Q2 is grounded, one end of the resistor R3 is connected with a power supply control one end, the other end of the resistor R4 is connected with a base of the triode Q2, and the other end of the resistor R4 is connected with an emitter of the triode Q2 and grounded; the input power supply two-selection circuit comprises a triode Q3, a triode Q4, a diode D2, resistors R5, R6, R7 and R8, the input power supply two is connected with an emitter of the triode Q3, a collector of the triode Q3 is connected with an anode of the diode D2, a cathode of the diode D2 is connected with an output power supply, a resistor R5 is connected with an emitter and a base of the triode Q3, the resistor R6 is connected with a base of the triode Q3 and a collector of the triode Q4, an emitter of the triode Q4 is grounded, one end of a resistor R7 is connected with a power supply control two, the other end of the resistor R8 is connected with a base of the Q4, and the other end of the resistor R8 is connected with an emitter of the Q4 and grounded; the input power supply is connected with the anode of the diode D3, and the cathode of the diode D3 is connected with the output power supply.
2. The accelerator supply voltage selection circuit of claim 1, wherein: and the signals of the first power supply control and the second power supply control are both from the MCU.
3. The accelerator supply voltage selection circuit of claim 1, wherein: the transistors Q1 and Q3 are PNP transistors, and the transistors Q2 and Q4 are NPN transistors.
4. The accelerator supply voltage selection circuit of claim 1, wherein: the diodes D1, D2 and D3 simultaneously play a role in voltage selection, and only output the input power supply with the highest voltage to the output power supply when two or three input power supplies are all output to the output power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122485154.2U CN216118451U (en) | 2021-10-15 | 2021-10-15 | Accelerator power supply voltage selection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122485154.2U CN216118451U (en) | 2021-10-15 | 2021-10-15 | Accelerator power supply voltage selection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN216118451U true CN216118451U (en) | 2022-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122485154.2U Active CN216118451U (en) | 2021-10-15 | 2021-10-15 | Accelerator power supply voltage selection circuit |
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|---|---|
| CN (1) | CN216118451U (en) |
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2021
- 2021-10-15 CN CN202122485154.2U patent/CN216118451U/en active Active
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