CN114710042A - Vehicle-mounted motor controller driving power supply - Google Patents
Vehicle-mounted motor controller driving power supply Download PDFInfo
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- CN114710042A CN114710042A CN202210302060.3A CN202210302060A CN114710042A CN 114710042 A CN114710042 A CN 114710042A CN 202210302060 A CN202210302060 A CN 202210302060A CN 114710042 A CN114710042 A CN 114710042A
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- power supply
- transformer
- chip
- management chip
- flyback
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a vehicle-mounted motor controller driving power supply which comprises a flyback power supply management chip, a transformer circuit and a driving chip, wherein the input end of the power supply management chip is connected with an input power supply, the output end of the power supply management chip is connected with the transformer circuit, and the output end of the transformer circuit is connected with the driving chip; the power management chip controls the transformer circuit to realize flyback power supply output to supply power to the driving chip by controlling the conduction of the primary side of the transformer. The invention has the advantages that: the circuit design is simple, the cost is low, and debugging is not needed; the primary sides of the 6 paths of transformers are connected in parallel, and the secondary sides are independently output, so that the problem of positive and negative power supply of the 6 paths of high-voltage side driving chips is solved, the problem of simple layout of the 6 paths of driving chips is solved, and the safety isolation distances of all the paths are better processed.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to a driving power supply of a vehicle-mounted controller.
Background
In recent years, with the vigorous development of the electric automobile industry, vehicle-mounted electronic equipment tends to be miniaturized, integrated and high in power density, and the design of a driving power supply is expected to be considered from cost saving, so that the driving power supply can be output by multiple auxiliary power supplies, is efficient and stable, meets the requirements of simple and safe driving layout of a matched IGBT module, and also needs to save space size and cost. Particularly, a motor Control unit (mcu) is used as an electric energy conversion core component of the whole electric vehicle, and it is urgently required to design a driving circuit in consideration of simplicity and stability of a driving power supply circuit, and the cost is more advantageous. The existing motor controller driving power supply is output in a multi-path parallel mode in a pulse transformer mode, the duty ratio is fixed, the stability of output voltage depends on the stability of power supply of a control loop, but the power supply of the control loop needs to be subjected to voltage stabilization treatment, and therefore the power supply topology and the circuit in the prior art cannot meet the requirements of the vehicle-mounted motor controller driving power supply.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a driving power supply of a vehicle-mounted motor controller, and a flyback switching power supply is provided through a circuit design so as to meet the requirements of the vehicle-mounted motor controller on the stable and reliable driving power supply with low cost
In order to achieve the purpose, the invention adopts the technical scheme that:
a vehicle-mounted motor controller driving power supply comprises a flyback power supply management chip, a transformer circuit and a driving chip, wherein the input end of the power supply management chip is connected with an input power supply, the output end of the power supply management chip is connected with the transformer circuit, and the output end of the transformer circuit is connected with the driving chip; the power management chip controls the transformer circuit to realize flyback power supply output to supply power to the driving chip by controlling the conduction of the primary side of the transformer.
The number of the transformer circuits is 6, each transformer circuit is correspondingly connected with one driving chip, and each driving chip is used for controlling the power supply of the motor IGBT module.
The primary sides of the 6 transformer circuits are connected in parallel and then connected with the flyback power management chip, and the secondary sides of the 6 transformer circuits are respectively and independently output.
The flyback power supply chip is realized by a Linte power management chip LT 1170.
The transformer circuit comprises a transformer T, a primary side power supply pin of the transformer is connected to an input power supply, a primary side grounding pin is grounded after passing through a flyback power supply chip, and the flyback power supply controls whether the primary side grounding pin is grounded or not; the anode pin of the secondary side of the transformer T is connected with the anode of a diode D1, the cathode of a diode D1 is connected with one end of a capacitor C1, and the other end of the capacitor is connected to the ground pin of the secondary side of the transformer T; the negative electrode pin of the secondary side is connected with the negative electrode of the diode D2, the positive electrode of the diode D2 is connected with the ground pin of the secondary side through the capacitor C2, the positive electrode pin of the switching power supply is led out from the negative electrode of the diode D1, and the negative electrode of the switching power supply is led out from the positive electrode of the diode D2.
The power input end VIN of the flyback power management chip is connected with an input power supply, the output end of the flyback power management chip is connected with the base electrode of the switching tube, the switching tube is connected between the grounding end of the transformer and the power ground in series, and the flyback power management chip controls whether the transformer is grounded or not by driving and controlling whether the switching tube is conducted or not so as to control the work of the transformer.
The flyback power management chip adopts a PMW switching power supply modulation technology, and realizes the control of the switching of the transformer energy by driving the internal integrated switching tube to be switched on and off.
The feedback input end FB of the flyback power management chip is connected with the feedback circuit, the feedback power is used for collecting voltage signals of the transformer T under the condition of energy storage, and the flyback power management chip is used for controlling the energy storage of the transformer T according to the voltage signals fed back by the feedback circuit.
The invention has the advantages that: the circuit design is simple, the cost is low, and debugging is not needed; the primary sides of the 6 paths of transformers are connected in parallel, and the secondary sides are independently output, so that the problem of positive and negative power supply of the 6 paths of high-voltage side driving chips is solved, the problem of simple layout of the 6 paths of driving chips is solved, and each path of safe isolation distance is better processed. Meanwhile, the multiple paths of transformers are connected in parallel, the volume and height of each transformer can be greatly reduced, the size and height of the whole driving scheme can be greatly reduced, the whole driving part and the whole control part of the controller can be conveniently integrated on one function board, the processing and wire harness connection transition cost is saved, and the installation and combination process is simpler.
Drawings
The contents of the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a block diagram of the circuit of the present invention;
fig. 2 is a schematic diagram of the power supply of the present invention.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
The scheme provides a novel flyback switching power supply driven by a motor controller, a flyback topology circuit formed by connecting a Linte power management chip (LT1170) and 6 transformers in parallel is adopted, a driving circuit and a switching tube are integrated in the power supply, 5A can be output to the maximum, and the maximum withstand voltage value of the switching tube is 75V; the primary sides of the 6 paths of transformers are connected in parallel, and the secondary sides are independently output, so that the problem of positive and negative power supply of the 6 paths of high-voltage side driving chips is solved, the problem of simple layout of the 6 paths of driving chips is solved, and the safety isolation distances of all the paths are better processed. Meanwhile, the multiple transformers are connected in parallel, the volume and height of each transformer can be greatly reduced, the size and height of the whole driving scheme can be greatly reduced, the whole driving part and the whole control part of the controller can be conveniently integrated on one functional board, the processing and wiring harness connection transition cost is saved, and the installation and combination process is simpler. The specific scheme is as follows:
as shown in fig. 1, which is a schematic diagram of a principle of a driving power supply of the present application, a vehicle-mounted motor controller driving power supply includes a flyback power supply management chip, six transformer circuits, and six driving chips, an input end of the flyback power supply management chip is connected to an input power supply, an output end of the flyback power supply management chip is connected to the transformer circuit, and an output end of the transformer circuit is connected to the driving chip; the power management chip controls the transformer circuit to realize flyback power supply output to supply power to the driving chip by controlling the conduction of the primary side of the transformer. The number of the transformer circuits is 6, each transformer circuit is correspondingly connected with one driving chip, and each driving chip is used for controlling the power supply of the IGBT module of the motor.
Wherein: the primary sides of the 6 transformer circuits are connected in parallel and then connected with the flyback power management chip, and the secondary sides of the 6 transformer circuits are respectively and independently output.
As shown in fig. 2, a power input terminal VIN of the flyback power management chip is connected to a 24V input power, an output terminal of the flyback power management chip is connected to a base of a switching tube, the switching tube is connected in series between a ground terminal of the transformer and a power ground, and the flyback power management chip controls whether the transformer is grounded by controlling whether the switching tube is turned on or not by driving to control the transformer. The flyback power supply chip is realized by a Linte power supply management chip LT 1170. The chip is internally provided with a switch tube which can control the conduction of a Vsw pin and a GND pin, and the conduction of a primary side ground loop of the transformer is controlled by controlling the conduction of the Vsw and the GND through the switch tube, wherein the GND pin of the chip is grounded, and a Vc pin of the chip is connected with a 24V power supply GND.
The flyback power management chip adopts a PMW switching power supply modulation technology, and realizes the control of the switching of the transformer energy by driving the on-off of the internal integrated switching tube. The switch tube is integrated in the chip, the collector of the switch tube is connected with the Vsw pin, and the emitter of the switch tube is connected with the GND pin, so that the primary side of the transformer is controlled to be grounded and conducted in a mode of controlling the switch tube.
The transformer comprises six transformer circuits, the primary sides of the transformers are connected in parallel, the secondary sides of the transformers independently output six control circuits, the six transformer circuits are the same, the transformer T1 is taken as an example for description, the transformer comprises a transformer T1, a primary side power pin of the transformer T1 is connected to a 24V input power supply, a primary side grounding pin is grounded after passing through a flyback power supply chip, namely is connected to a Vsw pin of the chip and is controlled by a switching tube in the chip to be grounded with the conduction of a GND pin, and the flyback power supply management chip controls whether the primary side grounding pin is grounded or not; the anode pin of the secondary side of the transformer T1 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with one end of the capacitor C1, and the other end of the capacitor C1 is connected with the ground pin of the secondary side of the transformer T1; the cathode pin of the secondary side is connected with the cathode of the diode D2, the anode of the diode D2 is connected with the ground pin of the secondary side through the capacitor C2, and the anode pin VCC1 of the switching power supply and the anode of the diode D2 are led out of the cathode of the diode D1 and the cathode VCC1 of the switching power supply. The other five transformer circuits are identical.
The feedback input end FB of the flyback power management chip is connected with the feedback circuit, the feedback power is used for collecting voltage signals of the transformer T under the condition of energy storage, and the flyback power management chip is used for controlling the energy storage of the transformer T according to the voltage signals fed back by the feedback circuit. The feedback circuit is mainly used for collecting the energy storage condition of the coil on the primary side of the transformer under the condition of energy storage. The anodes of the six transformers are connected together and then connected to a 24V anode; the cathode of the primary side of the six transformers is connected to a Vsw pin of the chip, a feedback circuit is arranged on one of the six transformers to realize sub-reaching of energy storage of the primary side coil, so that feedback signals are conveniently provided for energy storage and switching, namely control of a switching tube between the Vsw pin and a GND pin, the feedback circuit comprises a diode D13, a resistor R1 and a resistor R2, one of the six transformers is selected, T3 is taken as an example for illustration, a second coil is arranged on the primary side of the six transformers and used for sensing signals of a first coil on the primary side of the transformer, the anode of the feedback circuit is connected with the anode of a resistor D13, and the cathode of the feedback circuit is connected with a power ground; the negative electrode of the diode D13 is grounded after passing through the resistors R1 and R2 which are connected in series, a terminal is led out of the series connection of the resistors R1 and R2 and is connected to a chip FB pin, and the chip adjusts a PWM signal according to the FB pin signal to control the on-off of the switching tube so as to control the energy storage and switching power supply of the primary side coils of the six transformers. The signals of the induction coils are obtained between the R1 and the R2 in a voltage division mode and then are sent to the FB pin.
The working principle of the application is as follows: when the chip control switch tube is conducted, the secondary side of the transformer T1-T6 is not conducted due to the anti-reverse action of diodes D1, D2 … D12 and the like, the primary side coil stores energy, and the energy stored by the capacitors C1 and C2 … C12 supplies power to the load; when the chip control switch tube is disconnected, the voltage of the secondary side winding is in the opposite direction, at the moment, D1 and D2 … D12 are conducted, and the flyback voltage is transmitted to the secondary side and then supplies power to the load and simultaneously charges capacitors C1 and C2 … C12, so that safe and reliable power supply output is realized.
The integrated flyback switching power supply technology is adopted in the power supply scheme, the PMW switching power supply modulation technology is adopted by the power management chip, switching of transformer energy is achieved by driving the on-off of the internal integrated switching tube, the output voltage is fed back to the management chip, the PMW modulation function inside the chip is achieved, and stable voltage is input on the secondary side of the transformer according to design requirements.
According to the scheme, the cost of the whole driving scheme system is low, the circuit debugging is simple, the management chip is internally integrated with overcurrent, overtemperature, overvoltage and the like, the whole topology is simple and stable, the debugging is easy, and the PCB design layout is more concise. This scheme flyback circuit, input voltage range is wider, and output stability is higher, and this kind of chip belongs to the low noise simultaneously, and EMC problem just is considered to chip internal layout itself, and circuit design's satisfies EMC national standard requirement more easily.
As shown in fig. 2, the power supply has three working loops:
1. primary side flyback loop:
the normal current of the loop is 6-36V, the power is supplied to a storage battery in a wide range, the chip is supplied with power through the IC1, meanwhile, the primary side transformer is provided with pull-up energy, a certain duty ratio is output from the chip, an internal switching tube is driven, and flyback energy storage and switching output of the transformer T1-T6 are achieved.
2. A feedback loop:
under the condition that the primary side T3 voltage stores energy, the feedback loop feeds back a circuit to the IC chip after D13 rectification and filtering, so that voltage stabilization modulation is realized, and stable output is ensured.
3. An output loop:
according to the circuit, under the condition that the primary side energy storage of the flyback circuit is released, the diodes D1-D12 and the capacitors C1-C12 are used for achieving output rectification filtering, one path of +15V and one path of-7V voltage-stabilizing positive and negative power supplies are guaranteed to be input into each transformer, and the positive and negative power supplies of each rear-end driving chip are guaranteed to be stable. The output voltage stability depends on the fixed ratio of the turn ratio of the feedback side and the output turn ratio to determine the final output amplitude of each path.
It is clear that the specific implementation of the invention is not restricted to the above-described modes, and that various insubstantial modifications of the inventive concept and solution are within the scope of protection of the invention.
Claims (8)
1. The utility model provides an on-vehicle motor controller drive power supply which characterized in that: the flyback type power supply comprises a flyback power supply management chip, a transformer circuit and a driving chip, wherein the input end of the power supply management chip is connected with an input power supply, the output end of the power supply management chip is connected with the transformer circuit, and the output end of the transformer circuit is connected with the driving chip; the power management chip controls the transformer circuit to realize flyback power supply output to supply power for the driving chip by controlling the conduction of the side of the primary side of the transformer.
2. The vehicle-mounted motor controller drive power supply according to claim 1, characterized in that: the number of the transformer circuits is 6, each transformer circuit is correspondingly connected with one driving chip, and each driving chip is used for controlling the power supply of the motor IGBT module.
3. A vehicle-mounted motor controller drive power supply according to claim 2, characterized in that: the primary sides of the 6 transformer circuits are connected in parallel and then connected with the flyback power management chip, and the secondary sides of the 6 transformer circuits are respectively and independently output.
4. A vehicle-mounted motor controller drive power supply according to any one of claims 1 to 3, characterized in that: the flyback power supply chip is realized by a Linte power management chip LT 1170.
5. A vehicle-mounted motor controller drive power supply according to any one of claims 1 to 3, characterized in that: the transformer circuit comprises a transformer T, a primary side power pin of the transformer is connected to an input power supply, a primary side grounding pin is grounded after passing through a flyback power supply chip, and the flyback power supply controls whether the primary side grounding pin is grounded or not; the anode pin of the secondary side of the transformer T is connected with the anode of a diode D1, the cathode of a diode D1 is connected with one end of a capacitor C1, and the other end of the capacitor is connected to the ground pin of the secondary side of the transformer T; the negative electrode pin of the secondary side is connected with the negative electrode of the diode D2, the positive electrode of the diode D2 is connected with the ground pin of the secondary side through the capacitor C2, the positive electrode pin of the switching power supply is led out from the negative electrode of the diode D1, and the negative electrode of the switching power supply is led out from the positive electrode of the diode D2.
6. A vehicle-mounted motor controller drive power supply according to any one of claims 1 to 5, characterized in that: the power input end VIN of the flyback power management chip is connected with an input power supply, the output end of the flyback power management chip is connected with the base electrode of the switching tube, the switching tube is connected between the grounding end of the transformer and the power ground in series, and the flyback power management chip controls whether the transformer is grounded or not by driving and controlling whether the switching tube is conducted or not so as to control the work of the transformer.
7. The vehicle-mounted motor controller drive power supply according to claim 6, characterized in that: the flyback power management chip adopts a PMW switching power supply modulation technology, and realizes the control of the switching of the transformer energy by driving the internal integrated switching tube to be switched on and off.
8. A vehicle-mounted motor controller drive power supply according to any one of claims 1 to 6, characterized in that: the feedback input end FB of the flyback power management chip is connected with the feedback circuit, the feedback power is used for collecting voltage signals of the transformer T under the condition of energy storage, and the flyback power management chip is used for controlling the energy storage of the transformer T according to the voltage signals fed back by the feedback circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210302060.3A CN114710042A (en) | 2022-03-24 | 2022-03-24 | Vehicle-mounted motor controller driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210302060.3A CN114710042A (en) | 2022-03-24 | 2022-03-24 | Vehicle-mounted motor controller driving power supply |
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| Publication Number | Publication Date |
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| CN114710042A true CN114710042A (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210302060.3A Pending CN114710042A (en) | 2022-03-24 | 2022-03-24 | Vehicle-mounted motor controller driving power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117833608A (en) * | 2024-01-03 | 2024-04-05 | 广东芯聚能半导体有限公司 | Gate-adjustable driving voltage circuit |
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2022
- 2022-03-24 CN CN202210302060.3A patent/CN114710042A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117833608A (en) * | 2024-01-03 | 2024-04-05 | 广东芯聚能半导体有限公司 | Gate-adjustable driving voltage circuit |
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