CN210867513U - Power supply framework of electric control unit - Google Patents
Power supply framework of electric control unit Download PDFInfo
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- CN210867513U CN210867513U CN201921771214.3U CN201921771214U CN210867513U CN 210867513 U CN210867513 U CN 210867513U CN 201921771214 U CN201921771214 U CN 201921771214U CN 210867513 U CN210867513 U CN 210867513U
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Abstract
The utility model provides a power architecture of an electric control unit, which comprises a step-up and step-down circuit, a low-dropout voltage stabilizing circuit, a first multi-path output flyback power supply, a first protection circuit, a second multi-path output flyback power supply, a second protection circuit and an MCU (micro control unit); the input end of the voltage boosting and reducing circuit is connected with a source voltage VIN and outputs a first direct current voltage; the input end of the low-dropout voltage stabilizing circuit is connected with the output end of the boost voltage reducing circuit, and the low-dropout voltage stabilizing circuit outputs a second direct current voltage; the input end of the first multi-path output flyback power supply is connected with a source voltage VIN, and the first multi-path output flyback power supply comprises three voltage output ends which provide driving voltages of an upper bridge arm of a driving unit in the electric control unit; the MCU provides an enabling signal EN _ A of the first multi-path output flyback power supply; the first protection circuit is connected with the first multi-output flyback power supply, and the monitored current monitoring signal I _ A _ ADC and the monitored voltage monitoring signal V _ A _ ADC are fed back to the MCU; the circuit is more simplified and the economical efficiency is higher.
Description
Technical Field
The utility model relates to a power scheme, especially an electrical control unit's power framework.
Background
With the economic development and the continuous recombination of energy structures, people have higher and higher requirements on the environmental protection, safety and economy of vehicle operation.
The power supply framework of the electric control unit realizes power supply in the aspects of the weak power unit and the driving unit in the electric control unit; the prior art generally comprises a basic weak current power supply, other auxiliary power supply circuits and a plurality of independent driving power supplies, and has the defects of complicated power supply structure redundancy and certain defects in economy and safety.
Disclosure of Invention
To exist not enough among the prior art, the utility model provides an electrical unit's power framework, its circuit is more retrencied, and the economic nature is higher, and protect function is perfect. The utility model adopts the technical proposal that:
a power architecture of an electric control unit comprises a step-up and step-down circuit, a low dropout voltage stabilizing circuit, a first multi-output flyback power supply, a first protection circuit, a second multi-output flyback power supply, a second protection circuit and an MCU (microprogrammed control unit);
the input end of the voltage boosting and reducing circuit is connected with a source voltage VIN and outputs a first direct current voltage;
the input end of the low-dropout voltage stabilizing circuit is connected with the output end of the boost voltage reducing circuit, and the low-dropout voltage stabilizing circuit outputs a second direct current voltage;
the input end of the first multi-path output flyback power supply is connected with a source voltage VIN, and the first multi-path output flyback power supply comprises three voltage output ends which provide driving voltages of an upper bridge arm of a driving unit in the electric control unit; the MCU provides an enabling signal EN _ A of the first multi-path output flyback power supply;
the first protection circuit is connected with the first multi-output flyback power supply, and the monitored current monitoring signal I _ A _ ADC and the monitored voltage monitoring signal V _ A _ ADC are fed back to the MCU;
the input end of the second multi-path output flyback power supply is connected with a source voltage VIN, and the second multi-path output flyback power supply comprises three voltage output ends which provide driving voltages of a lower bridge arm of a driving unit in the electric control unit; the MCU provides an enabling signal EN _ B of the second multi-path output flyback power supply;
the second protection circuit is connected with the second multi-output flyback power supply, and the monitored current monitoring signal I _ B _ ADC and the monitored voltage monitoring signal V _ B _ ADC are fed back to the MCU.
Specifically, the circuit structures of the first multi-output flyback power supply and the second multi-output flyback power supply are the same, and the circuit structures include: a power control chip U1, an NMOS power tube Q1, capacitors C1, C2, C3, C4, C5, resistors R1, R2, R3, diodes D1, D2, D3, D4 and a transformer T1;
the enabling end of the power control chip U1 is connected with an enabling signal output by the MCU, and the voltage input end of the U1 is connected with a source voltage VIN, one end of a capacitor C1 and the synonym end of a primary winding L1 of the transformer T1; the other end of C1 is grounded; the control end of the U1 is connected with the grid electrode of a power tube Q1, and the drain electrode of a power tube Q1 is connected with the same-name end of a primary winding L1 of a transformer T1; the source electrode of the power tube Q1 is connected with one end of a resistor R3 and the current feedback end of a power control chip U1; the other end of the resistor R3 is grounded; acquiring a monitoring current signal I _ SEN at one end of a resistor R3;
an auxiliary winding L2 of the transformer T1 is connected with the anode of a diode D1 in a dotted manner, the cathode of the diode D1 is connected with one end of a resistor R1 and one end of a capacitor C2, and voltage VOUT1 is generated and at least used as a monitoring voltage signal VOUT 1; the other end of the resistor R1 is connected with one end of a resistor R2 and a voltage feedback end of U1; the synonym end of the auxiliary winding L2, the other end of the capacitor C2 and the other end of the resistor R2 are grounded;
the like end of a secondary winding L3 of the transformer T1 is connected with the anode of a diode D2, the cathode of the diode D2 is connected with one end of a capacitor C3, and the unlike end of a secondary winding L3 is connected with the other end of the capacitor C3;
the like end of a secondary winding L4 of the transformer T1 is connected with the anode of a diode D3, the cathode of the diode D3 is connected with one end of a capacitor C4, and the unlike end of a secondary winding L4 is connected with the other end of the capacitor C4;
the like end of a secondary winding L5 of the transformer T1 is connected with the anode of a diode D4, the cathode of the diode D4 is connected with one end of a capacitor C5, and the unlike end of a secondary winding L5 is connected with the other end of the capacitor C5;
three output voltages VOUT2 are obtained from cathodes of diodes D2, D3, D4.
Specifically, the first protection circuit and the second protection circuit have the same circuit structure, and include: operational amplifiers U2, U3, resistors R11, R12, R13, R14, R15, R16, capacitors C11 and C12;
the non-inverting input end of the operational amplifier U2 is connected with one end of a resistor R3 in the corresponding multi-output flyback power supply, namely, a monitoring current signal I _ SEN is connected; the inverting input end of the U2 is connected with one end of a resistor R11 and one end of a resistor R12, the other end of the resistor R11 is grounded, the other end of the resistor R12 is connected with the output end of the U2 and one end of a resistor R13, the other end of the resistor R13 is connected with one end of a capacitor C11, and a corresponding current monitoring signal I _ ADC is output; the other end of the capacitor C11 is grounded;
the non-inverting input end of the operational amplifier U3 is connected with one end of a resistor R14 and one end of a resistor R15, and the other end of the resistor R14 is connected with the cathode of a diode D1 in the corresponding multi-output flyback power supply, namely, the monitoring voltage signal VOUT1 is connected; the other end of the resistor R15 is grounded; the inverting input end of the U3 is connected with the output end of the U3 and one end of a resistor R16, the other end of the resistor R16 is connected with one end of a capacitor C12, and a corresponding voltage monitoring signal V _ ADC is output; the other end of the capacitor C12 is grounded.
Further, in the first multi-output flyback power supply and the second multi-output flyback power supply, the voltage VOUT1 is also connected as an auxiliary voltage.
The utility model has the advantages that:
1) the circuit is more simplified, the economy is higher, the auxiliary circuit power supply is directly provided by the flyback power supply, the upper bridge arm driving voltage is realized by using a single flyback power supply, and the lower bridge arm driving voltage is realized by using a single flyback power supply.
2) The safety is higher, and the voltage and the electric current of flyback power supply all pass through protection circuit and deliver to MCU, and the system can real time monitoring power state, in time makes the protection action.
3) The safety is higher, the power supply realizes the separation of the driving voltages of the upper bridge arm and the lower bridge arm, and when the upper bridge arm breaks down, the power supply of the lower bridge arm can still be normally executed, so that the possibility is provided for the active short-circuit protection of the system.
Drawings
Fig. 1 is a schematic diagram of a power supply architecture according to the present invention.
Fig. 2 is the schematic diagram of the multi-output flyback power supply of the present invention.
Fig. 3 is a schematic diagram of the protection circuit of the present invention.
Detailed Description
The invention is further described with reference to the following specific drawings and examples.
As shown in fig. 1, the low-voltage battery 1 provides a source voltage VIN, which may be 12v or 24 v; the low-voltage battery 1 supplies electric energy to the electronic control unit, and can be matched with a 12v or 24v voltage system;
the utility model provides a power framework of automatically controlled unit, including step-up and step-down circuit 2 (BUCK & BOOST circuit), low dropout voltage regulator circuit 3 (LDO circuit), first multiplexed output flyback power supply 4, first protection circuit 5, second multiplexed output flyback power supply 6, second protection circuit 7, MCU 8;
the input terminal of the step-up/step-down circuit 2 is connected to the source voltage VIN and outputs a first dc voltage, for example, 7.5 v; the first direct current voltage is not required to be too high so as to ensure that the LDO circuit at the later stage generates heat and the temperature rise is controllable;
the input end of the low-dropout voltage stabilizing circuit 3 is connected with the output end of the voltage boosting and reducing circuit 2, and the low-dropout voltage stabilizing circuit 3 outputs a second direct current voltage, for example, 5v, which is used for supplying power to an MCU (microprogrammed control unit), a peripheral logic unit and the like;
the input end of the first multi-path output flyback power supply 4 is connected with a source voltage VIN, and the first multi-path output flyback power supply 4 comprises three voltage output ends which provide driving voltages of an upper bridge arm of a driving unit in the electric control unit; the MCU8 provides an enable signal EN _ a of the first multi-output flyback power supply 4;
the first protection circuit 5 is connected with the first multi-output flyback power supply 4, and the monitored current monitoring signal I _ A _ ADC and the monitored voltage monitoring signal V _ A _ ADC are fed back to the MCU 8; the purposes of real-time monitoring and timely protection are achieved;
the input end of the second multi-path output flyback power supply 6 is connected with the source voltage VIN, and the second multi-path output flyback power supply 6 comprises three voltage output ends which provide the driving voltage of the lower bridge arm of the driving unit in the electric control unit; the MCU8 provides an enable signal EN _ B of the second multi-output flyback power supply 6;
the second protection circuit 7 is connected with the second multi-output flyback power supply 6, and the monitored current monitoring signal I _ B _ ADC and the monitored voltage monitoring signal V _ B _ ADC are fed back to the MCU 8; the purposes of real-time monitoring and timely protection are achieved;
a first auxiliary voltage can be connected to the first multi-output flyback power supply 4 and used as a first auxiliary power supply for other devices/components/modules needing direct current power supply in the electric control unit;
a second auxiliary voltage can be connected to the second multi-output flyback power supply 6 and used as a second auxiliary power supply for other devices/components/modules needing direct current power supply in the electric control unit;
the first multi-output flyback power supply 4 and the second multi-output flyback power supply 6 have the same circuit structure, as shown in fig. 2;
the method comprises the following steps: a power control chip U1, an NMOS power tube Q1, capacitors C1, C2, C3, C4, C5, resistors R1, R2, R3, diodes D1, D2, D3, D4 and a transformer T1;
the enable end of the power control chip U1 is connected to an enable signal (collectively denoted by EN in fig. 2) output by the MCU8, and the voltage input end of U1 is connected to the source voltage VIN, one end of the capacitor C1, and the synonym end of the primary winding L1 of the transformer T1; the other end of C1 is grounded; the control end of the U1 is connected with the grid electrode of a power tube Q1, and the drain electrode of a power tube Q1 is connected with the same-name end of a primary winding L1 of a transformer T1; the source electrode of the power tube Q1 is connected with one end of a resistor R3 and the current feedback end of a power control chip U1; the other end of the resistor R3 is grounded; acquiring a monitoring current signal I _ SEN at one end of a resistor R3, and supplying the monitoring current signal I _ SEN to a corresponding protection circuit;
an auxiliary winding L2 of the transformer T1 is connected with the anode of a diode D1 in a dotted line, the cathode of the diode D1 is connected with one end of a resistor R1 and one end of a capacitor C2, and voltage VOUT1 is generated, wherein the voltage VOUT1 is provided for a corresponding protection circuit to serve as a monitoring voltage signal VOUT1 on one hand, and can be used as a first auxiliary voltage for other devices/components/modules which need direct-current power supply in an electric control unit on the other hand; the other end of the resistor R1 is connected with one end of a resistor R2 and a voltage feedback end of U1; the synonym end of the auxiliary winding L2, the other end of the capacitor C2 and the other end of the resistor R2 are grounded;
the like end of a secondary winding L3 of the transformer T1 is connected with the anode of a diode D2, the cathode of the diode D2 is connected with one end of a capacitor C3, and the unlike end of a secondary winding L3 is connected with the other end of the capacitor C3;
the like end of a secondary winding L4 of the transformer T1 is connected with the anode of a diode D3, the cathode of the diode D3 is connected with one end of a capacitor C4, and the unlike end of a secondary winding L4 is connected with the other end of the capacitor C4;
the like end of a secondary winding L5 of the transformer T1 is connected with the anode of a diode D4, the cathode of the diode D4 is connected with one end of a capacitor C5, and the unlike end of a secondary winding L5 is connected with the other end of the capacitor C5;
three output voltages VOUT2 are obtained from cathodes of diodes D2, D3 and D4, and driving voltages of upper bridge arms of driving units in the electric control unit are provided;
in the second multi-output flyback power supply 6, a monitoring voltage signal can be connected at the same position and is used as a second auxiliary voltage;
the circuit structures of the first protection circuit 5 and the second protection circuit 7 are the same, as shown in fig. 3;
the method comprises the following steps: operational amplifiers U2, U3, resistors R11, R12, R13, R14, R15, R16, capacitors C11 and C12;
the non-inverting input end of the operational amplifier U2 is connected with one end of a resistor R3 in the corresponding multi-output flyback power supply, namely, a monitoring current signal I _ SEN is connected; the inverting input end of the U2 is connected with one end of a resistor R11 and one end of a resistor R12, the other end of the resistor R11 is grounded, the other end of the resistor R12 is connected with the output end of the U2 and one end of a resistor R13, the other end of the resistor R13 is connected with one end of a capacitor C11, and a corresponding current monitoring signal I _ ADC is output; the other end of the capacitor C11 is grounded;
the non-inverting input end of the operational amplifier U3 is connected with one end of a resistor R14 and one end of a resistor R15, and the other end of the resistor R14 is connected with the cathode of a diode D1 in the corresponding multi-output flyback power supply, namely, the monitoring voltage signal VOUT1 is connected; the other end of the resistor R15 is grounded; the inverting input end of the U3 is connected with the output end of the U3 and one end of a resistor R16, the other end of the resistor R16 is connected with one end of a capacitor C12, and a corresponding voltage monitoring signal V _ ADC is output; the other end of the capacitor C12 is grounded.
The MCU8 realizes real-time monitoring of voltage and current signals of the multi-output flyback power supplies 4 and 6, and provides necessary protection measures according to monitoring information so as to improve the safety of the system.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.
Claims (4)
1. A power architecture of an electric control unit is characterized by comprising a voltage boosting and reducing circuit (2), a low dropout voltage stabilizing circuit (3), a first multi-output flyback power supply (4), a first protection circuit (5), a second multi-output flyback power supply (6), a second protection circuit (7) and an MCU (8);
the input end of the voltage boosting and reducing circuit (2) is connected with a source voltage VIN and outputs a first direct current voltage;
the input end of the low-dropout voltage stabilizing circuit (3) is connected with the output end of the boost voltage reducing circuit (2), and the low-dropout voltage stabilizing circuit (3) outputs a second direct current voltage;
the input end of the first multi-path output flyback power supply (4) is connected with a source voltage VIN, and the first multi-path output flyback power supply (4) comprises three voltage output ends which provide driving voltage of an upper bridge arm of a driving unit in the electric control unit; the MCU (8) provides an enabling signal EN _ A of the first multi-output flyback power supply (4);
the first protection circuit (5) is connected with the first multi-output flyback power supply (4), and the monitored current monitoring signal I _ A _ ADC and the monitored voltage monitoring signal V _ A _ ADC are fed back to the MCU (8);
the input end of the second multi-path output flyback power supply (6) is connected with a source voltage VIN, and the second multi-path output flyback power supply (6) comprises three voltage output ends which provide driving voltages of a lower bridge arm of a driving unit in the electric control unit; the MCU (8) provides an enable signal EN _ B of the second multi-output flyback power supply (6);
the second protection circuit (7) is connected with the second multi-output flyback power supply (6), and the monitored current monitoring signal I _ B _ ADC and the monitored voltage monitoring signal V _ B _ ADC are fed back to the MCU (8).
2. The power architecture of an electronic control unit according to claim 1,
the circuit structure of the first multi-output flyback power supply (4) and the second multi-output flyback power supply (6) is the same, and the circuit structure comprises the following components: a power control chip U1, an NMOS power tube Q1, capacitors C1, C2, C3, C4, C5, resistors R1, R2, R3, diodes D1, D2, D3, D4 and a transformer T1;
the enabling end of the power control chip U1 is connected with the enabling signal output by the MCU (8), the voltage input end of the U1 is connected with the source voltage VIN, one end of a capacitor C1 and the synonym end of the primary winding L1 of the transformer T1; the other end of C1 is grounded; the control end of the U1 is connected with the grid electrode of a power tube Q1, and the drain electrode of a power tube Q1 is connected with the same-name end of a primary winding L1 of a transformer T1; the source electrode of the power tube Q1 is connected with one end of a resistor R3 and the current feedback end of a power control chip U1; the other end of the resistor R3 is grounded; acquiring a monitoring current signal I _ SEN at one end of a resistor R3;
an auxiliary winding L2 of the transformer T1 is connected with the anode of a diode D1 in a dotted manner, the cathode of the diode D1 is connected with one end of a resistor R1 and one end of a capacitor C2, and voltage VOUT1 is generated and at least used as a monitoring voltage signal VOUT 1; the other end of the resistor R1 is connected with one end of a resistor R2 and a voltage feedback end of U1; the synonym end of the auxiliary winding L2, the other end of the capacitor C2 and the other end of the resistor R2 are grounded;
the like end of a secondary winding L3 of the transformer T1 is connected with the anode of a diode D2, the cathode of the diode D2 is connected with one end of a capacitor C3, and the unlike end of a secondary winding L3 is connected with the other end of the capacitor C3;
the like end of a secondary winding L4 of the transformer T1 is connected with the anode of a diode D3, the cathode of the diode D3 is connected with one end of a capacitor C4, and the unlike end of a secondary winding L4 is connected with the other end of the capacitor C4;
the like end of a secondary winding L5 of the transformer T1 is connected with the anode of a diode D4, the cathode of the diode D4 is connected with one end of a capacitor C5, and the unlike end of a secondary winding L5 is connected with the other end of the capacitor C5;
three output voltages VOUT2 are obtained from cathodes of diodes D2, D3, D4.
3. The power architecture of an electronic control unit according to claim 2,
the first protection circuit (5) and the second protection circuit (7) have the same circuit structure, and include: operational amplifiers U2, U3, resistors R11, R12, R13, R14, R15, R16, capacitors C11 and C12;
the non-inverting input end of the operational amplifier U2 is connected with one end of a resistor R3 in the corresponding multi-output flyback power supply, namely, a monitoring current signal I _ SEN is connected; the inverting input end of the U2 is connected with one end of a resistor R11 and one end of a resistor R12, the other end of the resistor R11 is grounded, the other end of the resistor R12 is connected with the output end of the U2 and one end of a resistor R13, the other end of the resistor R13 is connected with one end of a capacitor C11, and a corresponding current monitoring signal I _ ADC is output; the other end of the capacitor C11 is grounded;
the non-inverting input end of the operational amplifier U3 is connected with one end of a resistor R14 and one end of a resistor R15, and the other end of the resistor R14 is connected with the cathode of a diode D1 in the corresponding multi-output flyback power supply, namely, the monitoring voltage signal VOUT1 is connected; the other end of the resistor R15 is grounded; the inverting input end of the U3 is connected with the output end of the U3 and one end of a resistor R16, the other end of the resistor R16 is connected with one end of a capacitor C12, and a corresponding voltage monitoring signal V _ ADC is output; the other end of the capacitor C12 is grounded.
4. The power architecture of an electronic control unit according to claim 2,
in the first multi-output flyback power supply (4) and the second multi-output flyback power supply (6), the voltage VOUT1 is also connected as an auxiliary voltage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921771214.3U CN210867513U (en) | 2019-10-21 | 2019-10-21 | Power supply framework of electric control unit |
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| CN201921771214.3U CN210867513U (en) | 2019-10-21 | 2019-10-21 | Power supply framework of electric control unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737341A (en) * | 2020-12-25 | 2021-04-30 | 航天科技控股集团股份有限公司 | Auxiliary high-frequency control power supply applied to vehicle-mounted inverter |
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2019
- 2019-10-21 CN CN201921771214.3U patent/CN210867513U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737341A (en) * | 2020-12-25 | 2021-04-30 | 航天科技控股集团股份有限公司 | Auxiliary high-frequency control power supply applied to vehicle-mounted inverter |
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