Motor controller power supply framework and new energy vehicle

Abstract

The utility model discloses a motor controller power supply framework and a new energy vehicle, and relates to the field of new energy vehicles, and the motor controller power supply framework comprises a plurality of power supply modules, a protection module, an upper bridge power supply circuit and a lower bridge power supply circuit. A plurality of redundant power supply modules are arranged, the upper bridge and the lower bridge of the driving circuit for driving the power modules are separated, and independent power supply of the upper bridge driving circuit and the lower bridge driving circuit is realized through the upper bridge power supply circuit and the lower bridge power supply circuit; the motor control module can still control the drive circuit to enter a safe state when a single-point failure condition exists in a power supply framework, so that the problem of overvoltage damage of a power module and a bus capacitor caused by power loss of a system is avoided, and the operation safety is improved.

Description

Technical Field

[0001] The present application relates to the field of new energy vehicles, and in particular to a motor controller power supply architecture and a new energy vehicle. Background Art

[0002] In new energy vehicles, the inverter, as one of the core components of the electrical powertrain, is usually powered by a low-voltage battery. If the low-voltage battery and the motor controller are abnormally connected or there is an open circuit / short circuit in the low-voltage line, resulting in the loss of low-voltage battery voltage and system power failure, the motor controller cannot control the motor drive circuit to enter a safe state. At the same time, the vehicle disconnects the relay between the power supply and the drive motor. Since permanent magnet synchronous motors are used as drive motors in new energy vehicles, when the relay is disconnected, the reverse electromotive force generated by the rotation of the permanent magnet synchronous motor charges the bus capacitor, causing the voltage of the bus capacitor to continue to rise, resulting in overvoltage damage to the bus capacitor and the power module.

[0003] Therefore, how to provide a solution to the above technical problems is a problem that those skilled in the art need to solve at present. Utility Model Content

[0004] The purpose of this application is to provide a motor controller power supply architecture and a new energy vehicle. When there is a single point failure in the power supply architecture, the motor control module can still control the drive circuit to enter a safe state, thereby avoiding the problem of overvoltage damage to the power module and bus capacitor caused by system power failure, and improving operational safety.

[0005] In order to solve the above technical problems, the present application provides a motor controller power supply architecture, including:

[0006] A plurality of power supply modules, wherein the output end of each power supply module outputs a low voltage power supply voltage;

[0007] An upper bridge power supply circuit, wherein an output end of the upper bridge power supply circuit is connected to the upper bridge drive circuit;

[0008] A lower bridge power supply circuit, wherein an output end of the lower bridge power supply circuit is connected to the lower bridge drive circuit;

[0009] A protection module, wherein the multiple input terminals of the protection module are connected one-to-one with the output terminals of the multiple power supply modules, the upper bridge output terminal of the protection module is connected with the input terminal of the upper bridge power supply circuit and the first input terminal of the motor control module, the lower bridge output terminal of the protection module is connected with the input terminal of the lower bridge power supply circuit and the second input terminal of the motor control module, and at least one of the upper bridge output terminal and the lower bridge output terminal outputs the low-voltage power supply voltage so that the motor control module controls the operation of the upper bridge drive circuit and / or the lower bridge drive circuit based on the actual voltages of the first input terminal and the second input terminal.

[0010] In an exemplary embodiment, each of the power supply modules includes a power supply device and an anti-reverse circuit, the first end of the anti-reverse circuit is connected to the power supply device, and the second end of the anti-reverse circuit serves as the output end of the power supply module. When the power supply device is reversely connected, the anti-reverse circuit connected to the power supply device is disconnected.

[0011] In an exemplary embodiment, the power supply device is a high voltage battery or a low voltage battery.

[0012] In an exemplary embodiment, the anti-reverse circuit includes a diode, an anode of the diode serves as a first end of the anti-reverse circuit, and a cathode of the diode serves as a second end of the anti-reverse circuit.

[0013] In an exemplary embodiment, the anti-reverse circuit includes a MOS tube and a voltage comparator, the first end of the MOS tube serves as the first end of the anti-reverse circuit, the second end of the MOS tube serves as the second end of the anti-reverse circuit, the output end of the voltage comparator is connected to the control end of the MOS tube, the first end of the voltage comparator is connected to the first end of the MOS tube, and the second end of the voltage comparator is connected to the second end of other anti-reverse circuits.

[0014] In an exemplary embodiment, the upper bridge power supply circuit includes:

[0015] An upper bridge auxiliary power supply, wherein the first end of the upper bridge auxiliary power supply is connected to the low voltage power supply voltage as the input end of the upper bridge power supply circuit, the upper bridge auxiliary power supply is used to convert the low voltage power supply voltage into an intermediate stable voltage, and the second end of the upper bridge auxiliary power supply outputs the intermediate stable voltage;

[0016] An upper bridge driving power supply, wherein the first end of the upper bridge driving power supply is connected to the second end of the upper bridge auxiliary power supply, the upper bridge driving power supply is used to convert the intermediate stable voltage into an isolated power supply voltage, and the second end of the upper bridge driving power supply serves as the output end of the upper bridge power supply circuit to output the isolated power supply voltage.

[0017] In an exemplary embodiment, the lower bridge power supply circuit includes:

[0018] A lower bridge auxiliary power supply, wherein the first end of the lower bridge auxiliary power supply is connected to the low voltage power supply voltage as the input end of the lower bridge power supply circuit, the lower bridge auxiliary power supply is used to convert the low voltage power supply voltage into an intermediate stable voltage, and the second end of the lower bridge auxiliary power supply outputs the intermediate stable voltage;

[0019] A lower bridge driving power supply, wherein the first end of the lower bridge driving power supply is connected to the second end of the lower bridge auxiliary power supply, the lower bridge driving power supply is used to convert the intermediate stable voltage into an isolated power supply voltage, and the second end of the lower bridge driving power supply serves as the output end of the lower bridge power supply circuit to output the isolated power supply voltage.

[0020] In an exemplary embodiment, the motor control module includes a controller, a system power supply, an upper bridge safety logic circuit and a lower bridge safety logic circuit, wherein:

[0021] The two input ends of the system power supply serve as the first input end and the second input end of the motor control module respectively, the output end of the system power supply is connected to the power supply end of the controller, the controlled end of the upper bridge safety logic circuit is connected to the upper bridge control end of the system power supply and the upper bridge control end of the controller, the controlled end of the lower bridge safety logic circuit is connected to the lower bridge control end of the system power supply and the lower bridge control end of the controller, the control end of the upper bridge safety logic circuit is connected to the upper bridge drive circuit, the control end of the lower bridge safety logic circuit is connected to the lower bridge drive circuit, the power supply end of the upper bridge safety logic circuit is connected to the upper bridge power supply circuit or the upper bridge output end, and the power supply end of the lower bridge safety logic circuit is connected to the lower bridge power supply circuit or the lower bridge output end;

[0022] The upper bridge safety logic circuit performs an upper bridge safety operation in response to a control signal output by the motor control module, and the lower bridge safety logic circuit performs a lower bridge safety operation in response to a control signal output by the motor control module.

[0023] In an exemplary embodiment, the protection module includes a plurality of upper bridge short-circuit protection circuits and a plurality of lower bridge short-circuit protection circuits, the first ends of the plurality of upper bridge short-circuit protection circuits are connected one-to-one with the output ends of the plurality of power supply modules, the common end after the second ends of the plurality of upper bridge short-circuit protection circuits are connected serves as the upper bridge output end of the protection module, the first ends of the plurality of lower bridge short-circuit protection circuits are connected one-to-one with the first ends of the plurality of upper bridge short-circuit protection circuits, and the common end after the second ends of the plurality of lower bridge short-circuit protection circuits are connected serves as the lower bridge output end of the protection module;

[0024] In response to an abnormality of its own second terminal or an abnormality of the first terminal of other upper bridge short-circuit protection circuits, the upper bridge short-circuit protection circuit performs a short-circuit current limiting action;

[0025] In response to an abnormality in the second terminal of the lower bridge or an abnormality in the first terminal of the upper bridge short-circuit protection circuit not connected to the lower bridge, the lower bridge short-circuit protection circuit performs a short-circuit current limiting action;

[0026] The anomaly includes an open circuit or a short circuit to ground.

[0027] In order to solve the above technical problems, the present application also provides a new energy vehicle, including a vehicle body and a permanent magnet synchronous motor arranged in the vehicle body and a motor controller power supply architecture as described in any one of the above.

[0028] The present application provides a motor controller power supply architecture, which sets up multiple redundant power supply modules, and separates the upper and lower bridges of the driving circuit for driving the power module, and realizes independent power supply of the upper bridge driving circuit and the lower bridge driving circuit through the upper bridge power supply circuit and the lower bridge power supply circuit, and at least one of the lower bridge output terminal and the upper bridge output terminal of the protection module can output a low-voltage power supply voltage, so that at least one of the upper bridge driving circuit and the lower bridge driving circuit can work normally under the support of the power supply circuit, and responds to the control signal output by the motor control module, so that the motor control module can still control the driving circuit to enter a safe state when there is a single point failure in the power supply architecture, thereby avoiding the problem of overvoltage damage to the power module and bus capacitor caused by system power failure, and improving operation safety. The present application also provides a new energy vehicle, which has the same beneficial effects as the above-mentioned motor controller power supply architecture. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic diagram of the structure of the first motor controller power supply architecture provided in this application;

[0031] Figure 2 A schematic diagram of the division of a driving circuit provided in this application;

[0032] Figure 3 A schematic diagram of the structure of the first power supply module provided in this application;

[0033] Figure 4 A schematic diagram of the structure of the second power supply module provided in this application;

[0034] Figure 5 A schematic diagram of the structure of the second motor controller power supply architecture provided in this application;

[0035] Figure 6 A schematic diagram of the structure of the third motor controller power supply architecture provided in this application;

[0036] Figure 7 This is a schematic diagram of the structure of the fourth motor controller power supply architecture provided in this application. DETAILED DESCRIPTION

[0037] The core of this application is to provide a motor controller power supply architecture and a new energy vehicle. When there is a single point failure in the power supply architecture, the motor control module can still control the drive circuit to enter a safe state, thereby avoiding the problem of overvoltage damage to the power module and bus capacitor caused by system power failure, and improving operational safety.

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] In a first aspect, the present application provides a motor controller power supply architecture, referring to Figure 1 As shown, the motor controller power architecture includes:

[0040] A plurality of power supply modules 1, wherein the output end of the power supply module 1 outputs a low voltage power supply voltage;

[0041] An upper bridge power supply circuit 2, wherein an output end of the upper bridge power supply circuit 2 is connected to the upper bridge driving circuit;

[0042] A lower bridge power supply circuit 3, wherein the output end of the lower bridge power supply circuit 3 is connected to the lower bridge driving circuit;

[0043] A protection module 4, wherein multiple input terminals of the protection module 4 are connected one-to-one with the output terminals of the multiple power supply modules 1, an upper bridge output terminal of the protection module 4 is connected with the input terminal of the upper bridge power supply circuit 2 and the first input terminal of the motor control module, a lower bridge output terminal of the protection module 4 is connected with the input terminal of the lower bridge power supply circuit 3 and the second input terminal of the motor control module, and at least one of the upper bridge output terminal and the lower bridge output terminal outputs a low-voltage power supply voltage, so that the motor control module controls the upper bridge drive circuit and / or the lower bridge drive circuit to operate based on the actual voltage of the first input terminal and the second input terminal.

[0044] In order to ensure that the driving circuit for driving the power module can still be controlled to perform safe actions when a single point failure exists in the power supply architecture, this embodiment separates the upper bridge and the lower bridge of the driving circuit, which are recorded as the upper bridge driving circuit and the lower bridge driving circuit. Figure 2As shown, the upper bridge drive circuit includes switch tubes Q1, Q2, and Q3, and the lower bridge drive circuit includes switch tubes Q4, Q5, and Q6. In this embodiment, an upper bridge power supply circuit 2 is provided to supply power to the upper bridge drive circuit alone, and a lower bridge power supply circuit 3 is provided to supply power to the lower bridge drive circuit alone. The upper bridge power supply circuit 2 and the lower bridge power supply circuit 3 are independent of each other and serve as backup for each other.

[0045] In this embodiment, a plurality of power supply modules 1 are provided, and the plurality of power supply modules 1 are mutually redundant. Each power supply module 1 is used to output a low-voltage power supply voltage. The protection module 4 includes a plurality of input terminals, and the plurality of input terminals of the protection module 4 are connected one-to-one with the output terminals of the plurality of power supply modules 1 to access the low-voltage power supply voltage. The protection module 4 includes an upper bridge output terminal and a lower bridge output terminal. The upper bridge output terminal of the protection module 4 is connected to the input terminal of the upper bridge power supply circuit 2, so that the upper bridge power supply circuit 2 is powered by the low-voltage power supply voltage output by the upper bridge output terminal, and the upper bridge power supply circuit 2 converts the low-voltage power supply voltage into an isolated power supply voltage to power the upper bridge drive circuit. The lower bridge output terminal of the protection module 4 is connected to the input terminal of the lower bridge power supply circuit 3, so that the lower bridge power supply circuit 3 is powered by the low-voltage power supply voltage output by the lower bridge output terminal, and the lower bridge power supply circuit 3 is used to convert the low-voltage power supply voltage into an isolated power supply voltage to power the lower bridge drive circuit. In this embodiment, at least one of the upper bridge output terminal and the lower bridge output terminal of the protection module 4 can output a low-voltage power supply voltage, so that at least one of the upper bridge power supply circuit 2 and the lower bridge power supply circuit 3 can normally supply power to the drive circuit connected to itself, that is, at least one of the upper bridge drive circuit or the lower bridge drive circuit can work normally. The first input terminal and the second input terminal of the motor control module are respectively connected to the upper bridge output terminal and the lower bridge output terminal. Since at least one of the upper bridge output terminal and the lower bridge output terminal of the protection module 4 can output a low-voltage power supply voltage, even if there is a single point failure in the power supply architecture, the motor control module can normally control the upper bridge drive circuit and the lower bridge drive circuit.

[0046] Of course, the motor control module can be pre-set to be powered by the low-voltage power supply voltage output from the upper bridge output end alone or by the low-voltage power supply voltage output from the lower bridge output end alone. If the motor control module is pre-set to be powered by the low-voltage power supply voltage output from the upper bridge output end, the power supply path between the lower bridge output end and the second input end of the motor control module can be disconnected. If the motor control module is pre-set to be powered by the low-voltage power supply voltage output from the lower bridge output end, the power supply path between the upper bridge output end and the first input end of the motor control module can be disconnected. Among them, the protection module 4 can be implemented by circuits, chips, components or a combination thereof, as long as the above functions can be realized, and this embodiment is not specifically limited here.

[0047] It can be seen that in this embodiment, multiple redundant power supply modules 1 are set, and the upper and lower bridges of the driving circuit for driving the power module are separated, and independent power supply of the upper bridge driving circuit and the lower bridge driving circuit is realized through the upper bridge power supply circuit 2 and the lower bridge power supply circuit 3. At least one of the lower bridge output end and the upper bridge output end of the protection module 4 can output a low-voltage power supply voltage, so that at least one of the upper bridge driving circuit and the lower bridge driving circuit can work normally under the support of the power supply circuit, and respond to the control signal output by the motor control module so that the motor control module can still control the driving circuit to enter a safe state when there is a single point failure in the power supply architecture, thereby avoiding the problem of overvoltage damage to the power module and the bus capacitor due to system power failure, thereby improving operation safety.

[0048] Based on the above embodiments:

[0049] In an exemplary embodiment, referring to Figure 3 and Figure 4 As shown, each power supply module 1 includes a power supply device and an anti-reverse circuit. The first end of the anti-reverse circuit is connected to the power supply device, and the second end of the anti-reverse circuit serves as the output end of the power supply module 1. When the power supply device is reversely connected, the anti-reverse circuit connected to the power supply device is disconnected.

[0050] In this embodiment, considering that the power supply architecture includes multiple power supply modules 1, each power supply module 1 includes a power supply device. In order to avoid damage to electrical components caused by reverse connection of the power supply device, each power supply module 1 also includes an anti-reverse circuit. The first end of the anti-reverse circuit is connected to the power supply device, and the second end of the anti-reverse circuit is connected to an input end of the protection module 4. If the power supply device is reversely connected to the power supply architecture, the anti-reverse circuit is disconnected to cut off the power supply path between the power supply device and the protection module 4, thereby not affecting the electrical components connected to the upper bridge output end or the lower bridge output end of the protection module 4.

[0051] In an exemplary embodiment, the power supply device is a high voltage battery or a low voltage battery.

[0052] When the power supply device in the power supply module 1 is a low-voltage battery, the power supply device can directly output a low-voltage power supply voltage. When the power supply device in the power supply module 1 is a high-voltage battery, the high-voltage battery outputs a high-voltage power supply voltage. Accordingly, the power supply module 1 also includes a high-voltage backup power supply. The first end of the high-voltage backup power supply is connected to the high-voltage battery, and the second end of the high-voltage backup power supply is connected to the anti-reverse circuit. The high-voltage backup power supply draws power from the high-voltage battery to convert the high-voltage power supply voltage into a low-voltage power supply voltage.

[0053] In an exemplary embodiment, the anti-reverse circuit includes a diode, an anode of the diode serves as a first end of the anti-reverse circuit, and a cathode of the diode serves as a second end of the anti-reverse circuit.

[0054] Reference Figure 3As shown, the anti-reverse circuit can be constructed by using a diode, and the anti-reverse connection protection is achieved through the unidirectional conduction characteristics of the diode. This connection method is simple, reliable and low-cost.

[0055] In an exemplary embodiment, the anti-reverse circuit includes a MOS tube and a voltage comparator, the first end of the MOS tube serves as the first end of the anti-reverse circuit, the second end of the MOS tube serves as the second end of the anti-reverse circuit, the output end of the voltage comparator is connected to the control end of the MOS tube, the first end of the voltage comparator is connected to the first end of the MOS tube, and the second end of the voltage comparator is connected to the second end of other anti-reverse circuits.

[0056] Reference Figure 4 As shown, the anti-reverse circuit can also be constructed by combining a MOS tube and a voltage comparator. The first end of the voltage comparator is connected to the output voltage of the local power supply device, and the second end of the voltage comparator is connected to the output voltage of other power supply modules 1 and the two are compared. A switching signal is obtained according to the comparison result, and the switching signal is output to the control end of the MOS tube through the output end to control the conduction or disconnection of the MOS tube, thereby realizing anti-reverse connection protection.

[0057] The MOS tube may be an NMOS tube or a PMOS tube, which may be selected according to actual engineering needs, and is not limited in this embodiment.

[0058] In an exemplary embodiment, referring to Figure 5 As shown, the upper bridge power supply circuit 2 includes:

[0059] An upper bridge auxiliary power supply 21, wherein a first end of the upper bridge auxiliary power supply 21 is connected to the low voltage power supply voltage as an input end of the upper bridge power supply circuit 2, and the upper bridge auxiliary power supply 21 is used to convert the low voltage power supply voltage into an intermediate stable voltage, and a second end of the upper bridge auxiliary power supply 21 outputs the intermediate stable voltage;

[0060] The upper bridge driving power supply 22, the first end of the upper bridge driving power supply 22 is connected to the second end of the upper bridge auxiliary power supply 21, the upper bridge driving power supply 22 is used to convert the intermediate stable voltage into an isolated power supply voltage, and the second end of the upper bridge driving power supply 22 serves as the output end of the upper bridge power supply circuit 2 to output the isolated power supply voltage.

[0061] In an exemplary embodiment, referring to Figure 5 As shown, the lower bridge power supply circuit 3 includes:

[0062] A lower bridge auxiliary power supply 31, wherein the first end of the lower bridge auxiliary power supply 31 is connected to the low voltage power supply voltage as the input end of the lower bridge power supply circuit 3, the lower bridge auxiliary power supply 31 is used to convert the low voltage power supply voltage into an intermediate stable voltage, and the second end of the lower bridge auxiliary power supply 31 outputs the intermediate stable voltage;

[0063] The lower bridge driving power supply 32 has a first end connected to the second end of the lower bridge auxiliary power supply 31, and the lower bridge driving power supply 32 is used to convert the intermediate stable voltage into an isolated power supply voltage. The second end of the lower bridge driving power supply 32 serves as the output end of the lower bridge power supply circuit 3 to output the isolated power supply voltage.

[0064] In this embodiment, the upper bridge power supply circuit 2 and the lower bridge power supply circuit 3 both include an auxiliary power supply and a driving power supply, wherein the auxiliary power supply is used to convert the low voltage power supply voltage output by the protection module 4 into a stable intermediate stable voltage, and then input the intermediate stable voltage to the driving power supply, and the driving power supply converts the intermediate stable voltage into an isolated power supply voltage to power the driving circuit. Of course, if the upper bridge driving power supply 22 selects a power supply with a wide range input, the upper bridge auxiliary power supply 21 may not be set in the upper bridge power supply circuit 2, and if the lower bridge driving power supply 32 selects a power supply with a wide range input, the lower bridge auxiliary power supply 31 may not be set in the lower bridge power supply circuit 3.

[0065] In an exemplary embodiment, referring to Figure 6 As shown, the motor control module includes a controller 5, a system power supply 6, an upper bridge safety logic circuit 7 and a lower bridge safety logic circuit 8, wherein:

[0066] The two input ends of the system power supply 6 serve as the first input end and the second input end of the motor control module respectively, the output end of the system power supply 6 is connected to the power supply end of the controller 5, the controlled end of the upper bridge safety logic circuit 7 is connected to the upper bridge control end of the system power supply 6 and the upper bridge control end of the controller 5, the controlled end of the lower bridge safety logic circuit 8 is connected to the lower bridge control end of the system power supply 6 and the lower bridge control end of the controller 5, the control end of the upper bridge safety logic circuit 7 is connected to the upper bridge drive circuit, the control end of the lower bridge safety logic circuit 8 is connected to the lower bridge drive circuit, the power supply end of the upper bridge safety logic circuit 7 is connected to the upper bridge power supply circuit 2 or the upper bridge output end, and the power supply end of the lower bridge safety logic circuit 8 is connected to the lower bridge power supply circuit 3 or the lower bridge output end;

[0067] The upper bridge safety logic circuit 7 performs an upper bridge safety operation in response to a control signal output by the motor control module, and the lower bridge safety logic circuit 8 performs a lower bridge safety operation in response to a control signal output by the motor control module.

[0068] In this embodiment, the upper bridge safety logic circuit 7 and the lower bridge safety logic circuit 8 can be powered directly from the upper bridge output end and the lower bridge output end respectively, that is, the power receiving end of the upper bridge safety logic circuit 7 is connected to the upper bridge output end, and the power receiving end of the lower bridge safety logic circuit 8 is connected to the lower bridge output end. If the upper bridge power supply circuit 2 is provided with an upper bridge auxiliary power supply 21, the upper bridge safety logic circuit 7 can be powered from the upper bridge auxiliary power supply 21, that is, the power receiving end of the upper bridge power supply circuit 2 is connected to the output end of the upper bridge auxiliary power supply 21. If the lower bridge power supply circuit 3 is provided with a lower bridge auxiliary power supply 31, the lower bridge safety logic circuit 8 can be powered from the lower bridge auxiliary power supply 31, that is, the power receiving end of the lower bridge safety logic circuit 8 is connected to the output end of the lower bridge auxiliary circuit. The controlled end of the upper bridge safety logic circuit 7 is connected to the control end of the system power supply 6 and the control end of the controller 5. When the controller 5 can work normally, the controller 5 outputs a control signal to control the upper bridge safety logic circuit 7. The upper bridge safety logic circuit 7 is connected to the upper bridge drive circuit, and responds to the received control signal to control the upper bridge drive circuit to limp or actively short-circuit. When the controller 5 is abnormal, the system power supply 6 outputs a control signal to control the upper bridge safety logic circuit 7. The upper bridge safety logic circuit 7 is connected to the upper bridge drive circuit, and responds to the received control signal to control the upper bridge drive circuit to limp or actively short-circuit. When both the system power supply 6 and the controller 5 are abnormal, if the system power supply 6 is set to be powered by the upper bridge power supply, at this time, the lower bridge can be directly controlled to be actively short-circuited. If the system power supply 6 is set to be powered by the lower bridge power supply, at this time, the upper bridge can be directly controlled to be actively short-circuited. The above-mentioned control logic for controlling the active short circuit or limp of the drive circuit is not the protection focus of this application. It is sufficient to select the existing control logic for controlling the drive circuit to enter a safe state.

[0069] In an exemplary embodiment, the protection module 4 includes a plurality of upper bridge short-circuit protection circuits and a plurality of lower bridge short-circuit protection circuits, the first ends of the plurality of upper bridge short-circuit protection circuits are connected one-to-one with the output ends of the plurality of power supply modules 1, the common end after the second ends of the plurality of upper bridge short-circuit protection circuits are connected serves as the upper bridge output end of the protection module 4, the first ends of the plurality of lower bridge short-circuit protection circuits are connected one-to-one with the first ends of the plurality of upper bridge short-circuit protection circuits, and the common end after the second ends of the plurality of lower bridge short-circuit protection circuits are connected serves as the lower bridge output end of the protection module 4;

[0070] In response to an abnormality of its own second terminal or an abnormality of the first terminal of other upper bridge short-circuit protection circuits, the upper bridge short-circuit protection circuit performs a short-circuit current limiting action;

[0071] In response to an abnormality in its second terminal or an abnormality in the first terminal of an upper bridge short-circuit protection circuit not connected to itself, the lower bridge short-circuit protection circuit performs a short-circuit current limiting action;

[0072] Anomalies include an open circuit or a short circuit to ground.

[0073] In this embodiment, the protection module 4 may include multiple upper bridge short-circuit protection circuits and multiple lower bridge short-circuit protection circuits, and the current in the upper bridge short-circuit protection circuit and the lower bridge short-circuit protection circuit can flow in both directions, wherein the common end of the multiple upper bridge short-circuit protection circuits serves as the upper bridge output end, and the common end of the multiple lower bridge short-circuit protection circuits serves as the lower bridge output end. Under the current power supply architecture, there are multiple fault points where faults may occur. The fault points may be on the common connection ends of the multiple short-circuit protection circuits and on the output ends of the power supply equipment. In order to avoid power loss to the system when a fault point fails, the upper bridge short-circuit protection circuit and the lower bridge short-circuit protection circuit corresponding to the fault point where the fault occurs perform short-circuit current limiting action, thereby preventing the voltages of the upper bridge output end and the lower bridge output end from being pulled down.

[0074] For ease of understanding of the solution of this application, refer to Figure 7 , taking two power supply modules 1 as an example for explanation, one power supply module 1 includes a low-voltage battery and an anti-reverse circuit constructed by a first diode or MOS tube and a voltage comparator, the other power supply module 1 includes a high-voltage battery, a high-voltage backup power supply and an anti-reverse circuit constructed by a second diode, and the protection module 4 includes a first short-circuit protection circuit, a second short-circuit protection circuit, a third short-circuit protection circuit and a fourth short-circuit protection circuit, wherein the first short-circuit protection circuit and the third short-circuit protection circuit are upper bridge short-circuit protection circuits, and the second short-circuit protection circuit and the fourth short-circuit protection circuit are lower bridge short-circuit protection circuits, Figure 7 A, B, C, D, and E are all possible fault points.

[0075] Reference Figure 7 The scheme of this application is described as follows:

[0076] After the low-voltage battery outputs a 12V or 24V low-voltage power supply voltage, it is divided into two paths after passing through the first diode, one path is the upper bridge power supply voltage, and the other path is the lower bridge power supply voltage. The upper bridge power supply voltage passes through the first short-circuit protection circuit and is given to the upper bridge auxiliary power supply 21. The upper bridge auxiliary power supply 21 converts the input upper bridge power supply voltage into a stable intermediate stable voltage and supplies it to the upper bridge drive power supply 22. If the upper bridge drive isolation power supply is a power supply with a wide input range, the upper bridge auxiliary power supply 21 can be omitted. The upper bridge power supply voltage output through the first short-circuit protection circuit can be directly given to the upper bridge drive power supply 22. The upper bridge drive power supply 22 converts the input The input power supply voltage is converted into an isolated power supply voltage and output to power the upper bridge drive circuit. The lower bridge power supply voltage is supplied to the lower bridge auxiliary power supply 31 after passing through the second short-circuit protection circuit. The lower bridge auxiliary power supply 31 converts the input lower bridge power supply voltage into a stable intermediate stable voltage and supplies it to the lower bridge drive power supply 32. If the lower bridge drive power supply 32 is a power supply with a wide input range, the lower bridge auxiliary power supply 31 can be omitted. The lower bridge power supply voltage outputted through the second short-circuit protection circuit can be directly supplied to the lower bridge drive power supply 32. The lower bridge drive power supply 32 converts the input power supply voltage into an isolated power supply voltage and outputs it to power the lower bridge drive circuit.

[0077] The high-voltage backup power supply draws power from the high-voltage battery and converts the high-voltage power supply voltage into a low-voltage power supply voltage. The low-voltage power supply voltage output by the high-voltage backup power supply is divided into two paths after passing through the second diode, one for the upper bridge power supply voltage and the other for the lower bridge power supply voltage. The upper bridge power supply voltage is connected to the output of the first short-circuit protection circuit after passing through the output of the third short-circuit protection circuit to supply power to the upper bridge; the lower bridge power supply voltage is connected to the output of the second short-circuit protection circuit after passing through the output of the fourth short-circuit protection circuit to supply power to the lower bridge. The currents of the first short-circuit protection circuit, the second short-circuit protection circuit, the third short-circuit protection circuit, and the fourth short-circuit protection circuit can flow in both directions;

[0078] The system power supply 6 can be powered by the upper bridge or the lower bridge. The system power supply 6 converts the low-voltage power supply voltage of 12V or 24V into 5V or 3.3V to supply power to the controller 5;

[0079] When point A is short-circuited to the ground, if the anti-reverse circuit connected to the low-voltage battery is constructed by selecting the first diode, there is no voltage at point B, and the voltages at points C and D come from the high-voltage backup power supply, and both the upper and lower bridges are powered, so it is possible to limp or perform an active short circuit; if the anti-reverse circuit connected to the low-voltage battery is constructed by selecting a MOS tube and a voltage comparator, the voltage comparator compares the voltage at point A with the voltage at point E. When the voltage at point A is lower than the voltage at point E, the voltage comparison circuit controls the MOS tube to turn off. At this time, the voltages at points C and D come from the high-voltage backup power supply, and the MOS tube is cut off, so that the currents at points C and D cannot flow back to point A, and both the upper and lower bridges are powered, so it is possible to limp or perform an active short circuit; when point A is open, the voltages at points C and D come from the high-voltage backup power supply, and both the upper and lower bridges are powered, so it is possible to limp or perform an active short circuit;

[0080] When point B is short-circuited to the ground, the voltages of points C and D come from the high-voltage backup power supply. At this time, the third short-circuit protection circuit and the fourth short-circuit protection circuit limit the short-circuit current to ensure that the voltages of points C and D are not pulled down, and both the upper and lower bridges have power, which can be limp or perform an active short circuit; when point B is open-circuited, the voltages of points C and D come from the high-voltage backup power supply, and both the upper and lower bridges have power, which can be limp or perform an active short circuit;

[0081] When point C is short-circuited to the ground, the voltage at point C is 0V, and the first short-circuit protection circuit and the third short-circuit protection circuit limit the short-circuit current to prevent the voltages at points B and E from being pulled to 0V. At this time, the voltage at point D is equal to the higher voltage between points B and E. At this time, there is power at point D, and the system performs an active short circuit of the lower bridge; when point C is open-circuited, the upper bridge has no power, and the voltage at point D is equal to the higher voltage between points B and E, and the system performs an active short circuit of the lower bridge;

[0082] When point D is short-circuited to the ground, the voltage at point D is 0V, and the lower bridge has no power. The second short-circuit protection circuit and the fourth short-circuit protection circuit limit the short-circuit current to ensure that the voltages at points B and D are not pulled down. The voltage at point C is equal to the higher value of the voltage between points B and E, and the system executes an active short circuit of the upper bridge; when point D is open-circuited, the lower bridge has no power, and the voltage at point C is equal to the higher value of the voltage between points B and E, the system executes an active short circuit of the upper bridge;

[0083] When point E is short-circuited to the ground, the voltage at point E is 0V, and the first short-circuit protection circuit and the second short-circuit protection circuit limit the short-circuit current to ensure that the voltage at point B is not pulled down. At this time, the voltages at points C and D are equal to the voltage at point B, and both the upper and lower bridges are powered. The system can limp or actively short-circuit; when point E is open-circuited, the voltages at points C and D are equal to the voltage at point B, and both the upper and lower bridges are powered. The system can limp or actively short-circuit;

[0084] When the upper bridge power supply fails, the lower bridge safety logic circuit 8 controls the lower bridge of the system to actively short-circuit;

[0085] When the lower bridge power supply fails, the upper bridge safety logic circuit 7 controls the upper bridge of the system to actively short-circuit;

[0086] When the system power supply 6 and the controller 5 are not faulty, the controller 5 controls the upper bridge safety logic circuit 7 and the lower bridge safety logic circuit 8 to perform an active short circuit. The specific type of active short circuit can be determined by the controller 5 judging the type of system fault. The existing fault judgment logic can be selected, which is not the focus of protection of this application;

[0087] When the system power supply 6 or the controller 5 fails, the system is actively short-circuited by the system power supply 6. If the system power supply 6 and the processor are powered by the upper bridge power supply voltage, an active short circuit of the lower bridge can be executed. If the system power supply 6 is powered by the lower bridge power supply voltage, an active short circuit of the upper bridge can be executed.

[0088] In summary, in new energy vehicles, the power supply architecture provided by this application is adopted, the upper and lower bridge power supplies are independent of each other and back up each other, and multiple short-circuit protection circuits ensure that Figure 7 When points A, B, C, D, and E are short-circuited or open-circuited, the system still has power to execute active short-circuit or limp home. For vehicle main drive inverters with functional safety requirements, it can prevent single-point failures in the power architecture from causing system power loss and inability to enter a safe state.

[0089] In a second aspect, the present application also provides a new energy vehicle, including a vehicle body, a permanent magnet synchronous motor arranged in the vehicle body, and a motor controller power supply architecture as described in any one of the above embodiments.

[0090] For an introduction to a new energy vehicle provided in this application, please refer to the above-mentioned embodiment, and this application will not go into details here.

[0091] The new energy vehicle provided in the present application has the same beneficial effects as the above-mentioned motor controller power supply architecture.

[0092] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0093] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A motor controller power supply architecture, characterized in that: include: A plurality of power supply modules, wherein the output end of each power supply module outputs a low voltage power supply voltage; An upper bridge power supply circuit, wherein an output end of the upper bridge power supply circuit is connected to the upper bridge drive circuit; A lower bridge power supply circuit, wherein an output end of the lower bridge power supply circuit is connected to the lower bridge drive circuit; A protection module, wherein the multiple input terminals of the protection module are connected one-to-one with the output terminals of the multiple power supply modules, the upper bridge output terminal of the protection module is connected with the input terminal of the upper bridge power supply circuit and the first input terminal of the motor control module, the lower bridge output terminal of the protection module is connected with the input terminal of the lower bridge power supply circuit and the second input terminal of the motor control module, and at least one of the upper bridge output terminal and the lower bridge output terminal outputs the low-voltage power supply voltage so that the motor control module controls the operation of the upper bridge drive circuit and / or the lower bridge drive circuit based on the actual voltages of the first input terminal and the second input terminal.

2. The motor controller power supply architecture according to claim 1, characterized in that: Each of the power supply modules includes a power supply device and an anti-reverse circuit, wherein the first end of the anti-reverse circuit is connected to the power supply device, and the second end of the anti-reverse circuit serves as the output end of the power supply module. When the power supply device is reversely connected, the anti-reverse circuit connected to the power supply device is disconnected.

3. The motor controller power supply architecture according to claim 2, characterized in that: The power supply device is a high voltage battery or a low voltage battery.

4. The motor controller power supply architecture according to claim 2, characterized in that: The anti-reverse circuit includes a diode, an anode of the diode serves as a first end of the anti-reverse circuit, and a cathode of the diode serves as a second end of the anti-reverse circuit.

5. The motor controller power supply architecture according to claim 2, characterized in that: The anti-reverse circuit includes a MOS tube and a voltage comparator, the first end of the MOS tube serves as the first end of the anti-reverse circuit, the second end of the MOS tube serves as the second end of the anti-reverse circuit, the output end of the voltage comparator is connected to the control end of the MOS tube, the first end of the voltage comparator is connected to the first end of the MOS tube, and the second end of the voltage comparator is connected to the second end of other anti-reverse circuits.

6. The motor controller power supply architecture according to claim 1, characterized in that: The upper bridge power supply circuit comprises: An upper bridge auxiliary power supply, wherein the first end of the upper bridge auxiliary power supply is connected to the low voltage power supply voltage as the input end of the upper bridge power supply circuit, the upper bridge auxiliary power supply is used to convert the low voltage power supply voltage into an intermediate stable voltage, and the second end of the upper bridge auxiliary power supply outputs the intermediate stable voltage; An upper bridge driving power supply, wherein the first end of the upper bridge driving power supply is connected to the second end of the upper bridge auxiliary power supply, the upper bridge driving power supply is used to convert the intermediate stable voltage into an isolated power supply voltage, and the second end of the upper bridge driving power supply serves as the output end of the upper bridge power supply circuit to output the isolated power supply voltage.

7. The motor controller power supply architecture according to claim 1, characterized in that: The lower bridge power supply circuit comprises: A lower bridge auxiliary power supply, wherein the first end of the lower bridge auxiliary power supply is connected to the low voltage power supply voltage as the input end of the lower bridge power supply circuit, the lower bridge auxiliary power supply is used to convert the low voltage power supply voltage into an intermediate stable voltage, and the second end of the lower bridge auxiliary power supply outputs the intermediate stable voltage; A lower bridge driving power supply, wherein the first end of the lower bridge driving power supply is connected to the second end of the lower bridge auxiliary power supply, the lower bridge driving power supply is used to convert the intermediate stable voltage into an isolated power supply voltage, and the second end of the lower bridge driving power supply serves as the output end of the lower bridge power supply circuit to output the isolated power supply voltage.

8. The motor controller power supply architecture according to claim 1, characterized in that: The motor control module includes a controller, a system power supply, an upper bridge safety logic circuit and a lower bridge safety logic circuit, wherein: The two input ends of the system power supply serve as the first input end and the second input end of the motor control module respectively, the output end of the system power supply is connected to the power supply end of the controller, the controlled end of the upper bridge safety logic circuit is connected to the upper bridge control end of the system power supply and the upper bridge control end of the controller, the controlled end of the lower bridge safety logic circuit is connected to the lower bridge control end of the system power supply and the lower bridge control end of the controller, the control end of the upper bridge safety logic circuit is connected to the upper bridge drive circuit, the control end of the lower bridge safety logic circuit is connected to the lower bridge drive circuit, the power supply end of the upper bridge safety logic circuit is connected to the upper bridge power supply circuit or the upper bridge output end, and the power supply end of the lower bridge safety logic circuit is connected to the lower bridge power supply circuit or the lower bridge output end; The upper bridge safety logic circuit performs an upper bridge safety operation in response to a control signal output by the motor control module, and the lower bridge safety logic circuit performs a lower bridge safety operation in response to a control signal output by the motor control module.

9. The motor controller power supply architecture according to any one of claims 1 to 8, characterized in that: The protection module comprises a plurality of upper bridge short-circuit protection circuits and a plurality of lower bridge short-circuit protection circuits, the first ends of the plurality of upper bridge short-circuit protection circuits are connected one-to-one with the output ends of the plurality of power supply modules, the common end after the second ends of the plurality of upper bridge short-circuit protection circuits are connected serves as the upper bridge output end of the protection module, the first ends of the plurality of lower bridge short-circuit protection circuits are connected one-to-one with the first ends of the plurality of upper bridge short-circuit protection circuits, and the common end after the second ends of the plurality of lower bridge short-circuit protection circuits are connected serves as the lower bridge output end of the protection module; In response to an abnormality of its own second terminal or an abnormality of the first terminal of other upper bridge short-circuit protection circuits, the upper bridge short-circuit protection circuit performs a short-circuit current limiting action; In response to an abnormality in the second terminal of the lower bridge or an abnormality in the first terminal of the upper bridge short-circuit protection circuit not connected to the lower bridge, the lower bridge short-circuit protection circuit performs a short-circuit current limiting action; The anomaly includes an open circuit or a short circuit to ground.

10. A new energy vehicle, characterized in that: It includes a vehicle body, a permanent magnet synchronous motor arranged in the vehicle body, and a motor controller power supply architecture as described in any one of claims 1-9.

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