Power supply circuit of motor controller and vehicle

Abstract

The invention provides a power supply circuit of a motor controller and a vehicle, and belongs to the technical field of electric vehicles. The power supply circuit of the motor controller comprises a power supply; the first power supply branch comprises a control switch, the control switch is connected in series between the power supply and the high-voltage side power supply end of the motor controller, and when the control switch is closed, the power supply supplies power to the high-voltage side power supply end of the motor controller; and the second power supply branch comprises an isolation device, the isolation device is connected in series between the control switch and the low-voltage side power supply end of the motor controller, and when the control switch and the isolation device are closed at the same time, the power supply supplies power to the low-voltage side power supply end of the motor controller. According to the power supply circuit of the motor controller and the vehicle, the power supply framework of the whole vehicle can be optimized, and the safety performance of the vehicle is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electric vehicles, and in particular relates to a power supply circuit of a motor controller and a vehicle. Background Art

[0002] With the rapid popularization and promotion of new energy vehicles, power electronics technology and semiconductor technology are increasingly used in automotive electronics, and the circuit structure of new energy electric drive products is becoming more and more complex. In order to meet different functional requirements, there are more and more auxiliary power supplies in vehicles, and the architecture is becoming more and more complex, especially when it comes to functional safety requirements and needs to reach ASIL C / D, the requirements for the power supply architecture of the electric drive system are getting higher and higher.

[0003] like Figure 1 As shown, the power supply of the motor controller generally includes a normal power supply KL30 and a high-voltage backup power supply, and the normal power supply KL30 and the high-voltage backup power supply are connected through a DC / DC circuit ( Figure 1 The DC / DC4 in the motor controller is used to power the motor controller. However, when the DC / DC circuit is over-voltage, there is a risk that the power supply of the upper bridge and the lower bridge in the motor controller will be broken down at the same time, making it impossible for the electric drive system to enter a safe state, which poses a hidden danger to the control of the vehicle. Summary of the invention

[0004] The purpose of the present invention is to provide a power supply circuit and vehicle for a motor controller, which can solve the risk of overvoltage in the power supply circuit of the motor controller, causing the power supplies of the upper bridge and the lower bridge in the motor controller to break down at the same time, making the electric drive system unable to enter a safe state.

[0005] To achieve the above object, the present invention provides a power supply circuit of a motor controller and a vehicle, wherein the power supply circuit of the motor controller at least includes:

[0006] Power supply;

[0007] A first power supply branch includes a control switch, wherein the control switch is connected in series between the power supply and a high-voltage power supply terminal of the motor controller, and when the control switch is closed, the power supply supplies power to the high-voltage power supply terminal of the motor controller; and

[0008] The second power supply branch includes an isolation device, which is connected in series between the control switch and the low-voltage side power supply end of the motor controller. When the control switch and the isolation device are closed at the same time, the power supply supplies power to the low-voltage side power supply end of the motor controller.

[0009] In one embodiment of the present invention, the power supply circuit supplies power to at least one of the motor controllers.

[0010] In one embodiment of the present invention, at least one DC-to-DC circuit is provided at the front end of the high-voltage side power supply end or the low-voltage side power supply end of each of the motor controllers, and one DC-to-DC circuit supplies power to the front end of a group of high-voltage side power supply ends or a group of low-voltage side power supply ends, or one DC-to-DC circuit supplies power to one of the three-phase power supply terminals in the front end power supply of a group of high-voltage side power supply ends or a group of low-voltage side power supply ends.

[0011] In one embodiment of the present invention, the power supply includes a normal power supply, and the control switch includes a first control switch, which is connected in series between the normal power supply and a high-voltage side power supply terminal of the motor controller.

[0012] In one embodiment of the present invention, the power supply circuit includes a top control switch, which is arranged between the first control switch and the isolation device, and the top control switch is arranged in the opposite direction to the first control switch.

[0013] In one embodiment of the present invention, the power supply includes a high-voltage backup power supply, and the control switch includes a second control switch, which is connected in series between the high-voltage backup power supply and a high-voltage side power supply terminal of the motor controller.

[0014] In one embodiment of the present invention, the power supply circuit includes a diode, the anode of the diode is electrically connected to the second control switch, and the cathode of the diode is electrically connected to one end of the isolation device connected to the first control switch.

[0015] In one embodiment of the present invention, the high-voltage backup power supply includes a DC-to-DC circuit, which has a first voltage output terminal and a second voltage output terminal. The DC-to-DC circuit inputs the voltage output by the vehicle battery, the first voltage output terminal is electrically connected to the second control switch, and the second voltage output terminal is electrically connected to the low-voltage side power supply terminal of the motor controller.

[0016] In one embodiment of the present invention, a diode is connected in series between the isolation device and the low-voltage side power supply terminal of each motor controller, the positive pole of the diode is electrically connected to the output terminal of the isolation device, and the negative pole of the diode is electrically connected to the low-voltage side power supply terminal of the motor controller.

[0017] In one embodiment of the present invention, a diode is connected in series between the second voltage output terminal and the low-voltage side power supply terminal of each motor controller, the positive pole of the diode is electrically connected to the second voltage output terminal, and the negative pole of the diode is electrically connected to the low-voltage side power supply terminal of the motor controller.

[0018] In one embodiment of the present invention, the isolation device is a DC-to-DC power supply circuit.

[0019] In an embodiment of the present invention, the output terminal of the isolation device is electrically connected to the voltage input terminal of the rotary transformer.

[0020] In one embodiment of the present invention, the power supply circuit includes an electronic induction braking system, and the electronic induction braking system is electrically connected to the output ends of the normal power supply and the high-voltage backup power supply.

[0021] In an embodiment of the present invention, the isolation device is a third control switch.

[0022] In an embodiment of the present invention, the third control switch is a triode or a PMOS tube.

[0023] In one embodiment of the present invention, the power supply circuit includes an electronic induction braking system, which is electrically connected to the output ends of the normal power supply and the high-voltage backup power supply, and the output end of the electronic induction braking system is electrically connected to a rotary transformer.

[0024] In an embodiment of the present invention, the power supply circuit includes a circuit protection device, and the circuit protection device is connected in series to the control switch.

[0025] The present invention also provides an electric vehicle, comprising a power supply circuit of the motor controller as described in any one of the above items.

[0026] In summary, the present invention provides a power supply circuit and vehicle for a motor controller, which supplies power to the high-voltage side power supply end of the motor controller through a first power supply branch, supplies power to the low-voltage side power supply end of the motor controller through a second power supply branch, and uses an isolation device to isolate the first power supply branch from the second power supply branch, thereby preventing the upper bridge and lower bridge power supplies of the motor controller from being broken down at the same time, thereby ensuring that the vehicle can enter a safe state and meet the requirements of ASIL C / D. At the same time, a DC-to-DC circuit is set in the high-voltage backup power supply, which can greatly reduce the cost of the backup power supply and reduce the size of the power supply. Using a control switch as an isolation device can further simplify the power supply architecture and optimize costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0028] Figure 1 The topological structure diagram of the power supply circuit in which the normal power supply and the high-voltage backup power supply supply power the motor controller through a DC / DC circuit.

[0029] Figure 2 It is a topological structure diagram of the power supply circuit of the motor controller when the isolation device is a DC-to-DC circuit and only one motor controller is provided in an embodiment of the present application.

[0030] Figure 3 yes Figure 2 The power supply circuit of the motor controller is in the topological structure diagram when it is powered only by the normal power supply.

[0031] Figure 4 yes Figure 2 The topological structure diagram of the power supply circuit of the motor controller is when the normal power supply is powered on first and then the high-voltage backup power supply is powered on.

[0032] Figure 5 yes Figure 2 The power supply circuit of the motor controller is powered on by the normal power supply first, and then the high-voltage backup power supply, and then the topological structure diagram when the normal power supply is lost.

[0033] Figure 6 This is a topological diagram of the power supply circuit of the motor controller when the isolation device is a DC-to-DC circuit and two motor controllers are provided in another embodiment of the present application.

[0034] Figure 7 yes Figure 6 The power supply circuit of the motor controller is in the topological structure diagram when it is powered only by the normal power supply.

[0035] Figure 8 yes Figure 6 The topological structure diagram of the power supply circuit of the motor controller is when the normal power supply is powered on first and then the high-voltage backup power supply is powered on.

[0036] Fig. 9 yes Figure 6 The power supply circuit of the motor controller is powered on by the normal power supply first, and then the high-voltage backup power supply, and then the topological structure diagram when the normal power supply is lost.

[0037] Fig.10 This is a topological diagram of the power supply circuit of the motor controller when the isolation device is a DC-to-DC circuit and two motor controllers are provided in another embodiment of the present application.

[0038] Fig.11 yes Fig.10 The power supply circuit of the motor controller is in the topological structure diagram when it is powered only by the normal power supply.

[0039] Fig.12 yes Fig.10 The topological structure diagram of the power supply circuit of the motor controller is when the normal power supply is powered on first and then the high-voltage backup power supply is powered on.

[0040] Fig.13 yes Fig.10 The power supply circuit of the motor controller is powered on by the normal power supply first, and then the high-voltage backup power supply, and then the topological structure diagram when the normal power supply is lost.

[0041] Fig.14 It is a structural block diagram of an electronic device in one embodiment of the present application. DETAILED DESCRIPTION

[0042] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0044] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The degrees indicated by "high" and "low" are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have high and low, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] With the rapid popularization and promotion of new energy vehicles, power electronics technology and semiconductor technology are increasingly used in automotive electronics, and the circuit structure of new energy electric drive products is becoming more and more complex. In order to meet different functional requirements, there are more and more auxiliary power supplies in vehicles, and the architecture is becoming more and more complex. Especially when it comes to functional safety requirements and needs to reach ASIL C / D, the requirements for the power supply architecture of the electric drive system are getting higher and higher. It is necessary to simplify our power supply architecture as much as possible and reduce system costs while meeting system requirements (including functional safety requirements).

[0046] In an electric vehicle, the power supply of the motor controller includes a normal power supply KL30 and a high-voltage backup power supply, and both the normal power supply KL30 and the high-voltage backup power supply can supply power to the motor controller. Among them, the motor can be an electric motor or a generator. The motor controller is equivalent to an inverter, which is provided with a high-voltage power supply end and a low-voltage power supply end, wherein the high-voltage power supply end controls the upper bridge of the inverter, and the low-voltage power supply end controls the lower bridge of the inverter. The present application provides a power supply circuit for a motor controller, which can ensure that the power supplies of the upper bridge and the lower bridge of the inverter will not be damaged by breakdown at the same time, thereby ensuring that the motor controller can enter a safe state.

[0047] The power supply circuit of the motor controller provided in the present application includes a power supply, a first power supply branch and a second power supply branch, wherein the first power supply branch includes a control switch, and the control switch is connected in series between the power supply and the high-voltage power supply end of the motor controller, and when the control switch is closed, the power supply supplies power to the high-voltage power supply end of the motor controller. The second power supply branch includes an isolation device, and the isolation device is connected in series between the control switch and the low-voltage power supply end of the motor controller, and when the control switch and the isolation device are closed at the same time, the power supply supplies power to the low-voltage power supply end of the motor controller.

[0048] See also Figures 2 to 13 As shown, in the present application, a motor controller may be provided in the vehicle, or two or more motor controllers may be provided. The power supply includes a normal power supply KL30 and a high-voltage backup power supply, and at least two control switches may be provided, wherein one control switch is provided between the normal power supply KL30 and the high-voltage power supply terminal of the motor controller, and the other control switch is provided between a voltage output terminal of the high-voltage backup power supply and the high-voltage power supply terminal of the motor controller. The isolation device may be a common control switch such as a transistor, or may be a DC-DC circuit that can play an isolation role.

[0049] Example 1

[0050] See also Figure 2 As shown, in one embodiment of the present invention, a motor controller is provided in the vehicle, and the motor controller can be a motor controller of a generator or a motor controller of an electric motor. The high-voltage power supply end of the motor controller includes high-voltage three-phase power supply terminals HU1, HV1 and HW1, and the low-voltage power supply end of the motor controller includes low-voltage three-phase power supply terminals LU1, LV1 and LW1. In the power supply circuit of the motor controller provided in the present application, the first power supply branch is powered by the high-voltage three-phase power supply terminals HU1, HV1 and HW1, and the second power supply branch is powered by the low-voltage three-phase power supply terminals LU1, LV1 and LW1. The isolation device is, for example, a DC-to-DC circuit.

[0051] See also Figure 2As shown, in one embodiment of the present invention, in order to ensure the voltage stability of each power supply terminal, in the power supply circuit of the motor controller provided in the present application, a DC-to-DC circuit is provided at the front end of the high-voltage three-phase power supply terminals HU1, HV1 and HW1 and the low-voltage three-phase power supply terminals LU1, LV1 and LW1. And at least one DC-to-DC circuit is provided at the high-voltage three-phase power supply terminals HU1, HV1 and HW1, and at least one DC-to-DC circuit is provided at the front end of the low-voltage three-phase power supply terminals LU1, LV1 and LW1. In this embodiment, a first DC-to-DC circuit DC / DC1 is provided at the front end of the high-voltage three-phase power supply terminals HU1, HV1 and HW1, that is, the output end of the first DC-to-DC circuit DC / DC1 is electrically connected to the high-voltage three-phase power supply terminals HU1, HV1 and HW1. A second DC-to-DC circuit DC / DC2 is provided at the front end of the low-voltage three-phase power supply terminals LU1, LV1 and LW1, that is, the output end of the second DC-to-DC circuit DC / DC2 is electrically connected to the low-voltage three-phase power supply terminals LU1, LV1 and LW1. In other embodiments, three first DC-to-DC circuits DC / DC1 are provided at the front end of the high-voltage three-phase power supply terminals HU1, HV1 and HW1, and the output end of each first DC-to-DC circuit DC / DC1 is electrically connected to one of the high-voltage three-phase power supply terminals HU1, HV1 and HW1. Three second DC-to-DC circuits DC / DC2 are provided at the front end of the low-voltage three-phase power supply terminals LU1, LV1 and LW1, and the output end of each second DC-to-DC circuit DC / DC2 is electrically connected to one of the low-voltage three-phase power supply terminals LU1, LV1 and LW1.

[0052] See also Figure 2 As shown, in one embodiment of the present invention, in the power supply circuit of the motor controller, the power supply includes a normal power supply KL30 and a high-voltage backup power supply, and correspondingly, the control switch includes a first control switch S1 and a second control switch S2. The first control switch S1 is arranged between the normal power supply KL30 and the high-voltage power supply terminal of the motor controller, and the second control switch S2 is arranged between the voltage output terminal of the high-voltage backup power supply and the high-voltage power supply terminal of the motor controller.

[0053] See also Figure 2As shown, in one embodiment of the present invention, the normal power supply KL30 is directly connected to the positive pole of the vehicle battery to provide a stable power supply for the electronic control unit. And the normal power supply KL30 is not affected by the key switch, and is always powered to provide power for electronic equipment that requires continuous power supply. The high-voltage backup power supply includes a DC-to-DC circuit, namely the third DC-to-DC circuit DC / DC3. The third DC-to-DC circuit DC / DC3 converts the voltage BUS+ output by the vehicle battery into a first voltage required by the high-voltage power supply end of the motor controller, and a second voltage required by the low-voltage power supply end of the motor controller. The corresponding third DC-to-DC circuit DC / DC3 has a first voltage output terminal Vo1 and a second voltage output terminal Vo2, the first voltage output terminal Vo1 outputs a first voltage, and the second voltage output terminal Vo2 outputs a second voltage.

[0054] See also Figure 2 As shown, in one embodiment of the present invention, one end of the first control switch S1 is electrically connected to the normal power supply KL30, and the other end is electrically connected to the input end of the first DC-DC circuit DC / DC1. When the first control switch S1 is closed, the normal power supply KL30 supplies power to the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-DC circuit DC / DC1. One end of the second control switch S2 is electrically connected to the first voltage output terminal Vo1 of the high-voltage backup power supply, and the other end is electrically connected to the input end of the first DC-DC circuit DC / DC1. When the second control switch S2 is closed, the high-voltage backup power supply supplies power to the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the second DC-DC circuit DC / DC2. In the power supply circuit, a first diode D1 is also provided. The positive pole of the first diode D1 is electrically connected to the other end of the second control switch S2, and the negative pole is electrically connected to the end where the isolation device and the first control switch S1 are connected, that is, the input end of the first DC-DC circuit DC / DC1, to avoid current backflow.

[0055] See also Figure 2 As shown, in one embodiment of the present invention, a top control switch S4 is further provided between the first control switch S1 and the isolation device, and the top control switch S4 is provided in the opposite direction to the first control switch S1. That is, when both the first control switch S1 and the top control switch S4 are PMOS, the source of the first control switch S1 is connected to the source of the top control switch S4, the drain of the first control switch S1 is electrically connected to the constant power supply KL30, and the drain of the top control switch S4 is electrically connected to the isolation device. When the system is not awakened, the top control switch S4 can be provided to disconnect the circuit at the rear end of the first control switch S1 to reduce the static current.

[0056] See also Figure 2As shown, in one embodiment of the present invention, the isolation device is a DC-to-DC circuit, and is a fourth DC-to-DC circuit DC / DC4. The fourth DC-to-DC circuit DC / DC4 is connected in series between the control switch and the low-voltage power supply end of the motor controller, that is, the voltage input end of the fourth DC-to-DC circuit DC / DC4 is electrically connected to the common end of the first control switch S1 and the first diode D1. When the first control switch S1 is closed and the isolation device (the fourth DC-to-DC circuit DC / DC4) is turned on, the normal power supply KL30 supplies power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the isolation device (the fourth DC-to-DC circuit DC / DC4) and the second DC-to-DC circuit DC / DC2. When the second control switch S2 is closed and the isolation device (the fourth DC-to-DC circuit DC / DC4) is turned on, the first voltage output end Vo1 of the high-voltage backup power supply supplies power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the isolation device (the fourth DC-to-DC circuit DC / DC4) and the second DC-to-DC circuit DC / DC2.

[0057] See also Figure 2 As shown, in one embodiment of the present invention, the second voltage output terminal Vo2 of the high-voltage backup power supply is electrically connected to the input terminal of the second DC-to-DC circuit DC / DC2, and the low-voltage three-phase power supply terminals LU1, LV1 and LW1 are powered by the second DC-to-DC circuit DC / DC2. At the same time, a second diode D2 is provided between the isolation device (the fourth DC-to-DC circuit DC / DC4) and the second DC-to-DC circuit DC / DC2, and a third diode D3 is provided between the second voltage output terminal Vo2 of the high-voltage backup power supply and the second DC-to-DC circuit DC / DC2. Specifically, the positive pole of the second diode D2 is electrically connected to the output terminal of the isolation device (the fourth DC-to-DC circuit DC / DC4), and the negative pole is electrically connected to the input terminal of the second DC-to-DC circuit DC / DC2. The positive pole of the third diode D3 is electrically connected to the second voltage output terminal Vo2 of the high-voltage backup power supply, and the negative pole is electrically connected to the input terminal of the second DC-to-DC circuit DC / DC2. The second diode D2 can prevent the current from flowing back from the second voltage output terminal Vo2 of the high-voltage backup power supply, and the third diode D3 can prevent the current from flowing back from the permanent power supply KL30 or the first voltage output terminal Vo1 of the high-voltage backup power supply.

[0058] See also Figure 2 As shown, in one embodiment of the present invention, when the isolation device is the fourth DC-to-DC circuit DC / DC4, a rotary transformer Resolver is also provided at the output end of the isolation device, and the fourth DC-to-DC circuit DC / DC4 is used to power the rotary transformer Resolver.

[0059] See also Figure 2As shown, in one embodiment of the present invention, in the power supply circuit of the motor controller provided in the present application, an electronic induction brake system (Sensotronic Brake Control, SBC) is also included. The electronic induction brake system SBC is electrically connected to the voltage output end of the normal power supply KL30 and the high-voltage backup power supply. Specifically, the voltage input end of the electronic induction brake system SBC is electrically connected to the normal power supply KL30, and the common end of the second control switch S2 and the first diode D1 at the rear end of the first voltage output end Vo1 of the high-voltage backup power supply. Therefore, both the normal power supply KL30 and the high-voltage backup power supply can supply power to the electronic induction brake system SBC.

[0060] See also Figure 2 As shown, in one embodiment of the present invention, a fourth diode D4 is connected in series between the electronic induction braking system SBC and the normal power supply KL30, and a fifth diode D5 is connected in series between the electronic induction braking system SBC and the high-voltage backup power supply. Specifically, the positive pole of the fourth diode D4 is electrically connected to the normal power supply KL30, and the negative pole is electrically connected to the voltage input terminal of the electronic induction braking system SBC. The positive pole of the fifth diode D5 is electrically connected to the common terminal of the second control switch S2 and the first diode D1, and the negative pole is electrically connected to the voltage input terminal of the electronic induction braking system SBC. The setting of the fourth diode D4 and the fifth diode D5 can prevent the normal power supply KL30 and the high-voltage backup power supply from backflowing at the voltage input terminal of the electronic induction braking system SBC.

[0061] See also Figure 2 As shown, in one embodiment of the present invention, a microcontroller unit (MCU) and a CAN bus or other device are also provided at the voltage output end of the electronic induction brake system SBC, and the electronic induction brake system SBC is used to power the microcontroller unit MCU, the CAN bus or other devices.

[0062] See also Figure 3 As shown, in one embodiment of the present invention, when only the normal power supply KL30 is powered, the normal power supply KL30 directly powers the electronic induction brake system SBC, and the normal power supply KL30 directly powers the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-to-DC circuit DC / DC1. At the same time, the normal power supply KL30 powers the rotary transformer Resolver through the isolation device (the fourth DC-to-DC circuit DC / DC4), and the normal power supply KL30 powers the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the isolation device (the fourth DC-to-DC circuit DC / DC4) and the second DC-to-DC circuit DC / DC2.

[0063] See also Figure 4As shown, in one embodiment of the present invention, when the normal power supply KL30 is powered on first and then the high-voltage backup power supply is powered on, the power supply circuit works as follows. Specifically, when the normal power supply KL30 is powered on first, the normal power supply KL30 directly supplies power to the electronic induction brake system SBC, and the normal power supply KL30 directly supplies power to the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-to-DC circuit DC / DC1. At the same time, the normal power supply KL30 supplies power to the rotary transformer Resolver through the isolation device (the fourth DC-to-DC circuit DC / DC4), and the normal power supply KL30 supplies power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the isolation device (the fourth DC-to-DC circuit DC / DC4) and the second DC-to-DC circuit DC / DC2. When the high-voltage backup power supply is powered on, the voltage output by the second voltage output terminal Vo2 of the high-voltage backup power supply is greater than the output voltage of the isolation device (the fourth DC-to-DC circuit DC / DC4). At this time, the normal power supply KL30 still directly supplies power to the electronic induction brake system SBC, and the normal power supply KL30 directly supplies power to the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-to-DC circuit DC / DC1. The normal power supply KL30 supplies power to the rotary transformer Resolver through the isolation device (the fourth DC-to-DC circuit DC / DC4). The second diode D2 set between the isolation device (the fourth DC-to-DC circuit DC / DC4) and the second DC-to-DC circuit DC / DC2 is reversely cut off, and the normal power supply KL30 cannot supply power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1, but the second voltage output terminal Vo2 of the high-voltage backup power supply is used to supply power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1.

[0064] See also Figure 5As shown, in one embodiment of the present invention, when the normal power supply KL30 is powered on first and then the high-voltage backup power supply is powered on, when the normal power supply KL30 is lost, the power supply circuit works as follows. Specifically, when the normal power supply KL30 is powered on first, the normal power supply KL30 directly supplies power to the electronic induction brake system SBC, and the normal power supply KL30 directly supplies power to the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-to-DC circuit DC / DC1. At the same time, the normal power supply KL30 supplies power to the rotary transformer Resolver through the isolation device (the fourth DC-to-DC circuit DC / DC4), and the normal power supply KL30 supplies power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the isolation device (the fourth DC-to-DC circuit DC / DC4) and the second DC-to-DC circuit DC / DC2. When the high-voltage backup power supply is powered on, the voltage output by the second voltage output terminal Vo2 of the high-voltage backup power supply is greater than the output voltage of the isolation device (the fourth DC-to-DC circuit DC / DC4). At this time, the normal power supply KL30 still directly supplies power to the electronic induction brake system SBC, and the normal power supply KL30 directly supplies power to the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-to-DC circuit DC / DC1. The normal power supply KL30 supplies power to the rotary transformer Resolver through the isolation device (the fourth DC-to-DC circuit DC / DC4). The second diode D2 set between the isolation device (the fourth DC-to-DC circuit DC / DC4) and the second DC-to-DC circuit DC / DC2 is reversely cut off, and the normal power supply KL30 cannot supply power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1, but the second voltage output terminal Vo2 of the high-voltage backup power supply is used to supply power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1. When the normal power supply KL30 is lost, the first control switch S1 is first disconnected, and then the second control switch S2 is closed to prevent the high-voltage backup power supply from backflowing current to the normal power supply KL30. Afterwards, the first voltage output terminal Vo1 of the high-voltage backup power supply outputs the first voltage, and supplies power to the electronic induction braking system SBC through the second control switch S2 and the fifth diode D5, and supplies power to the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the second control switch S2, the first diode D1 and the first DC-to-DC circuit DC / DC1. At the same time, the first voltage output terminal Vo1 of the high-voltage backup power supply supplies power to the rotary transformer Resolver through the second control switch S2, the first diode D1 and the isolation device (the fourth DC-to-DC circuit DC / DC4). The second voltage output terminal Vo2 of the high-voltage backup power supply supplies power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the third diode D3.

[0065] See also Figure 2As shown, in one embodiment of the present invention, when the rear stage of the second control switch S2 is short-circuited, for example, the electronic induction brake system SBC is short-circuited to the ground or the rear stage of the first control switch S1 is short-circuited to the ground. First, the second control switch S2 is controlled to be closed, and the first voltage output terminal Vo1 of the high-voltage backup power supply is pulled low. At this time, the second control switch S2 is controlled to be disconnected to prevent the second voltage output terminal Vo2 of the high-voltage backup power supply from being pulled low, so that the second DC-to-DC circuit DC / DC2 cannot work, and then the emergency state of the inverter lower bridge cannot be entered. After a period of time, if the port of the normal power supply KL30 is still undervoltage, the second control switch S2 is closed again, and the second control switch S2 is disconnected again after the first voltage output terminal Vo1 of the high-voltage backup power supply is pulled low. After that, the second control switch S2 is executed in a periodic operation of first closing and then disconnecting.

[0066] Example 2

[0067] See also Figure 6 As shown, in another embodiment of the present invention, two motor controllers are provided in the vehicle, one of which is a motor controller for a generator, and the other is a motor controller for a motor. The high-voltage power supply end of the motor controller of the motor includes high-voltage three-phase power supply terminals HU1, HV1 and HW1, and the low-voltage power supply end of the motor controller of the motor includes low-voltage three-phase power supply terminals LU1, LV1 and LW1. The high-voltage power supply end of the motor controller of the generator includes high-voltage three-phase power supply terminals HU2, HV2 and HW2, and the low-voltage power supply end of the motor controller of the generator includes low-voltage three-phase power supply terminals LU2, LV2 and LW2. In the power supply circuit of the motor controller provided in the present application, the first power supply branch is the high-voltage three-phase power supply terminals HU1, HV1 and HW1, and the high-voltage three-phase power supply terminals HU2, HV2 and HW2 are powered, and the second power supply branch is the low-voltage three-phase power supply terminals LU1, LV1 and LW1, the low-voltage three-phase power supply terminals LU2, LV2 and LW2 and power supply. The isolation device is, for example, a DC-to-DC circuit.

[0068] See also Figure 6As shown, in another embodiment of the present invention, in order to ensure the voltage stability of each power supply terminal, in the power supply circuit of the motor controller provided in the present application, a DC-to-DC circuit is provided at the front end of the high-voltage three-phase power supply terminals HU1, HV1 and HW1, the low-voltage three-phase power supply terminals LU1, LV1 and LW1, the high-voltage three-phase power supply terminals HU2, HV2 and HW2, and the low-voltage three-phase power supply terminals LU2, LV2 and LW2. And at least one DC-to-DC circuit is provided at the front end of the high-voltage three-phase power supply terminals HU1, HV1 and HW1, and the high-voltage three-phase power supply terminals HU2, HV2 and HW2, and at least one DC-to-DC circuit is provided at the front end of the low-voltage three-phase power supply terminals LU1, LV1 and LW1, and the low-voltage three-phase power supply terminals LU2, LV2 and LW2. In this embodiment, a first DC-to-DC circuit DC / DC1 is provided at the front end of the high-voltage three-phase power supply terminals HU1, HV1 and HW1, that is, the output end of the first DC-to-DC circuit DC / DC1 is electrically connected to the high-voltage three-phase power supply terminals HU1, HV1 and HW1. A second DC-to-DC circuit DC / DC2 is provided at the front end of the low-voltage three-phase power supply terminals LU1, LV1 and LW1, that is, the output end of the second DC-to-DC circuit DC / DC2 is electrically connected to the low-voltage three-phase power supply terminals LU1, LV1 and LW1. A fifth DC-to-DC circuit DC / DC5 is provided at the front end of the high-voltage three-phase power supply terminals HU2, HV2 and HW2, that is, the output end of the fifth DC-to-DC circuit DC / DC5 is electrically connected to the high-voltage three-phase power supply terminals HU2, HV2 and HW2. A sixth DC-to-DC circuit DC / DC6 is provided at the front end of the low-voltage three-phase power supply terminals LU2, LV2 and LW2, that is, the output end of the sixth DC-to-DC circuit DC / DC6 is electrically connected to the low-voltage three-phase power supply terminals LU2, LV2 and LW2. In other embodiments, three first DC-to-DC circuits DC / DC1 are provided at the front end of the high-voltage three-phase power supply terminals HU1, HV1 and HW1, and the output end of each first DC-to-DC circuit DC / DC1 is electrically connected to one of the high-voltage three-phase power supply terminals HU1, HV1 and HW1. Three second DC-to-DC circuits DC / DC2 are provided at the front end of the low-voltage three-phase power supply terminals LU1, LV1 and LW1, and the output end of each second DC-to-DC circuit DC / DC2 is electrically connected to one of the low-voltage three-phase power supply terminals LU1, LV1 and LW1. Three fifth DC-to-DC circuits DC / DC5 are arranged at the front end of the high-voltage three-phase power supply terminals HU2, HV2 and HW2, and the output end of each fifth DC-to-DC circuit DC / DC5 is electrically connected to one of the high-voltage three-phase power supply terminals HU2, HV2 and HW2.Three sixth DC-to-DC circuits DC / DC6 are arranged at the front end of the low-voltage three-phase power supply terminals LU2, LV2 and LW2, and the output end of each sixth DC-to-DC circuit DC / DC6 is electrically connected to one of the low-voltage three-phase power supply terminals LU2, LV2 and LW2.

[0069] See also Figure 6 As shown, in another embodiment of the present invention, in the power supply circuit of the motor controller, the power supply includes a normal power supply KL30 and a high-voltage backup power supply, and correspondingly, the control switch includes a first control switch S1 and a second control switch S2. The first control switch S1 is arranged between the normal power supply KL30 and the high-voltage power supply terminal of the motor controller, and the second control switch S2 is arranged between the voltage output terminal of the high-voltage backup power supply and the high-voltage power supply terminal of the motor controller.

[0070] See also Figure 6 As shown, in another embodiment of the present invention, the permanent power supply KL30 is directly connected to the positive pole of the vehicle battery to provide a stable power supply for the electronic control unit. And the permanent power supply KL30 is not affected by the key switch, and is always powered to supply power to electronic equipment that requires continuous power supply. The high-voltage backup power supply includes a DC-to-DC circuit, namely the third DC-to-DC circuit DC / DC3. The third DC-to-DC circuit DC / DC3 converts the voltage BUS+ output by the vehicle battery into a first voltage required by the high-voltage power supply end of the motor controller, and a second voltage required by the low-voltage power supply end of the motor controller. The corresponding third DC-to-DC circuit DC / DC3 has a first voltage output terminal Vo1 and a second voltage output terminal Vo2, the first voltage output terminal Vo1 outputs a first voltage, and the second voltage output terminal Vo2 outputs a second voltage.

[0071] See also Figure 6As shown, in another embodiment of the present invention, one end of the first control switch S1 is electrically connected to the normal power supply KL30, and the other end is electrically connected to the input end of the first DC-to-DC circuit DC / DC1 and the input end of the fifth DC-to-DC circuit DC / DC5. When the first control switch S1 is closed, the normal power supply KL30 supplies power to the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-to-DC circuit DC / DC1, and supplies power to the high-voltage three-phase power supply terminals HU2, HV2 and HW2 through the fifth DC-to-DC circuit DC / DC5. One end of the second control switch S2 is electrically connected to the first voltage output terminal Vo1 of the high-voltage backup power supply, and the other end is electrically connected to the input end of the first DC-to-DC circuit DC / DC1 and the input end of the fifth DC-to-DC circuit DC / DC5. When the second control switch S2 is closed, the high-voltage backup power supply supplies power to the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the second DC-to-DC circuit DC / DC2, and supplies power to the high-voltage three-phase power supply terminals HU2, HV2 and HW2 through the fifth DC-to-DC circuit DC / DC5. A first diode D1 is also provided in the power supply circuit. The positive pole of the first diode D1 is electrically connected to the other end of the second control switch S2, and the negative pole is electrically connected to the end where the isolation device and the first control switch S1 are connected, i.e., the input end of the first DC-to-DC circuit DC / DC1, to avoid current backflow.

[0072] See also Figure 6 As shown, in another embodiment of the present invention, a top control switch S4 is further provided between the first control switch S1 and the isolation device, and the top control switch S4 is provided in the opposite direction to the first control switch S1. That is, when both the first control switch S1 and the top control switch S4 are PMOS, the source of the first control switch S1 is connected to the source of the top control switch S4, the drain of the first control switch S1 is electrically connected to the constant power supply KL30, and the drain of the top control switch S4 is electrically connected to the isolation device. When the system is not awakened, the top control switch S4 can be provided to disconnect the circuit at the rear end of the first control switch S1 to reduce the static current.

[0073] See also Figure 6As shown, in another embodiment of the present invention, the isolation device is a DC-to-DC circuit, and is a fourth DC-to-DC circuit DC / DC4. The fourth DC-to-DC circuit DC / DC4 is connected in series between the control switch and the low-voltage power supply end of the motor controller, that is, the voltage input end of the fourth DC-to-DC circuit DC / DC4 is electrically connected to the common end of the first control switch S1 and the first diode D1. When the first control switch S1 is closed and the isolation device (the fourth DC-to-DC circuit DC / DC4) is turned on, the normal power supply KL30 supplies power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the isolation device (the fourth DC-to-DC circuit DC / DC4) and the second DC-to-DC circuit DC / DC2, and supplies power to the low-voltage three-phase power supply terminals LU2, LV2 and LW2 through the isolation device (the fourth DC-to-DC circuit DC / DC4) and the sixth DC-to-DC circuit DC / DC6. When the second control switch S2 is closed and the isolation device (the fourth DC-to-DC circuit DC / DC4) is turned on, the first voltage output terminal Vo1 of the high-voltage backup power supply supplies power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the isolation device (the fourth DC-to-DC circuit DC / DC4) and the second DC-to-DC circuit DC / DC2, and supplies power to the low-voltage three-phase power supply terminals LU2, LV2 and LW2 through the isolation device (the fourth DC-to-DC circuit DC / DC4) and the sixth DC-to-DC circuit DC / DC6.

[0074] See also Figure 6As shown, in another embodiment of the present invention, the second voltage output terminal Vo2 of the high-voltage backup power supply is electrically connected to the input terminals of the second DC-to-DC circuit DC / DC2 and the sixth DC-to-DC circuit DC / DC6, and the low-voltage three-phase power supply terminals LU1, LV1 and LW1 are powered by the second DC-to-DC circuit DC / DC2, and the low-voltage three-phase power supply terminals LU2, LV2 and LW2 are powered by the sixth DC-to-DC circuit DC / DC6. At the same time, a second diode D2 is provided between the isolation device (the fourth DC-to-DC circuit DC / DC4) and the second DC-to-DC circuit DC / DC2, and a third diode D3 is provided between the second voltage output terminal Vo2 of the high-voltage backup power supply and the second DC-to-DC circuit DC / DC2. A sixth diode D6 is provided between the isolation device (the fourth DC-to-DC circuit DC / DC4) and the sixth DC-to-DC circuit DC / DC6, and a seventh diode D7 is provided between the second voltage output terminal Vo2 of the high-voltage backup power supply and the sixth DC-to-DC circuit DC / DC6. Specifically, the positive pole of the second diode D2 is electrically connected to the output end of the isolation device (the fourth DC-to-DC circuit DC / DC4), and the negative pole is electrically connected to the input end of the second DC-to-DC circuit DC / DC2. The positive pole of the third diode D3 is electrically connected to the second voltage output end Vo2 of the high-voltage backup power supply, and the negative pole is electrically connected to the input end of the second DC-to-DC circuit DC / DC2. The positive pole of the sixth diode D6 is electrically connected to the output end of the isolation device (the fourth DC-to-DC circuit DC / DC4), and the negative pole is electrically connected to the input end of the sixth DC-to-DC circuit DC / DC6. The positive pole of the seventh diode D7 is electrically connected to the second voltage output end Vo2 of the high-voltage backup power supply, and the negative pole is electrically connected to the input end of the sixth DC-to-DC circuit DC / DC6. The second diode D2 and the sixth diode D6 can prevent the current from flowing back to the second voltage output end Vo2 of the high-voltage backup power supply, and the third diode D3 and the seventh diode D7 can prevent the current from flowing back to the first voltage output end Vo1 of the normal power supply KL30 or the high-voltage backup power supply.

[0075] See also Figure 6 As shown, in another embodiment of the present invention, when the isolation device is a fourth DC-to-DC circuit DC / DC4, a rotary transformer Resolver is further provided at the output end of the isolation device, and the fourth DC-to-DC circuit DC / DC4 is used to power the rotary transformer Resolver.

[0076] See also Figure 6As shown, in another embodiment of the present invention, the power supply circuit of the motor controller provided in the present application also includes an electronic induction brake system (Sensotronic Brake Control, SBC). The electronic induction brake system SBC is electrically connected to the voltage output end of the normal power supply KL30 and the high-voltage backup power supply. Specifically, the voltage input end of the electronic induction brake system SBC is electrically connected to the normal power supply KL30, and the common end of the second control switch S2 and the first diode D1 at the rear end of the first voltage output end Vo1 of the high-voltage backup power supply. Therefore, both the normal power supply KL30 and the high-voltage backup power supply can supply power to the electronic induction brake system SBC.

[0077] See also Figure 6 As shown, in another embodiment of the present invention, a fourth diode D4 is connected in series between the electronic induction braking system SBC and the normal power supply KL30, and a fifth diode D5 is connected in series between the electronic induction braking system SBC and the high-voltage backup power supply. Specifically, the positive pole of the fourth diode D4 is electrically connected to the normal power supply KL30, and the negative pole is electrically connected to the voltage input terminal of the electronic induction braking system SBC. The positive pole of the fifth diode D5 is electrically connected to the common terminal of the second control switch S2 and the first diode D1, and the negative pole is electrically connected to the voltage input terminal of the electronic induction braking system SBC. The setting of the fourth diode D4 and the fifth diode D5 can prevent the normal power supply KL30 and the high-voltage backup power supply from backflowing at the voltage input terminal of the electronic induction braking system SBC.

[0078] See also Figure 6 As shown, in another embodiment of the present invention, a microcontroller unit (MCU) and a CAN bus or other device are also provided at the voltage output end of the electronic induction brake system SBC, and the electronic induction brake system SBC is used to power the microcontroller unit MCU, the CAN bus or other devices.

[0079] See also Figure 7As shown, in another embodiment of the present invention, when only the normal power supply KL30 is powered, the normal power supply KL30 directly powers the electronic induction brake system SBC, and the normal power supply KL30 directly powers the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-to-DC circuit DC / DC1, and directly powers the high-voltage three-phase power supply terminals HU2, HV2 and HW2 through the fifth DC-to-DC circuit DC / DC5. At the same time, the normal power supply KL30 powers the rotary transformer Resolver through the isolation device (the fourth DC-to-DC circuit DC / DC4), and the normal power supply KL30 powers the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the isolation device (the fourth DC-to-DC circuit DC / DC4) and the second DC-to-DC circuit DC / DC2, and powers the low-voltage three-phase power supply terminals LU2, LV2 and LW2 through the isolation device (the fourth DC-to-DC circuit DC / DC4) and the sixth DC-to-DC circuit DC / DC6.

[0080] See also Figure 8As shown, in another embodiment of the present invention, when the normal power supply KL30 is powered on first and then the high-voltage backup power supply is powered on, the power supply circuit works as follows. Specifically, when the normal power supply KL30 is powered on first, the normal power supply KL30 directly supplies power to the electronic induction brake system SBC, and the normal power supply KL30 directly supplies power to the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-to-DC circuit DC / DC1, and directly supplies power to the high-voltage three-phase power supply terminals HU2, HV2 and HW2 through the fifth DC-to-DC circuit DC / DC5. At the same time, the normal power supply KL30 supplies power to the rotating transformer Resolver through the isolation device (the fourth DC-to-DC circuit DC / DC4), and the normal power supply KL30 supplies power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the isolation device (the fourth DC-to-DC circuit DC / DC4) and the second DC-to-DC circuit DC / DC2, and supplies power to the low-voltage three-phase power supply terminals LU2, LV2 and LW2 through the isolation device (the fourth DC-to-DC circuit DC / DC4) and the sixth DC-to-DC circuit DC / DC6. When the high-voltage backup power supply is powered on, the voltage outputted by the second voltage output terminal Vo2 of the high-voltage backup power supply is greater than the output voltage of the isolation device (the fourth DC-to-DC circuit DC / DC4). At this time, the normal power supply KL30 still directly supplies power to the electronic induction brake system SBC, and the normal power supply KL30 directly supplies power to the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-to-DC circuit DC / DC1, and directly supplies power to the high-voltage three-phase power supply terminals HU2, HV2 and HW2 through the fifth DC-to-DC circuit DC / DC5. The normal power supply KL30 supplies power to the rotary transformer Resolver through the isolation device (the fourth DC-to-DC circuit DC / DC4). The second diode D2 set between the isolation device (the fourth DC-to-DC circuit DC / DC4) and the second DC-to-DC circuit DC / DC2 is reversely cut off, and the normal power supply KL30 cannot supply power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1, but the second voltage output terminal Vo2 of the high-voltage backup power supply is used to supply power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1. The sixth diode D6 arranged between the isolation device (the fourth DC-to-DC circuit DC / DC4) and the sixth DC-to-DC circuit DC / DC6 is reverse cutoff, and the normal power supply KL30 cannot supply power to the low-voltage three-phase power supply terminals LU2, LV2 and LW2. Instead, the second voltage output terminal Vo2 of the high-voltage backup power supply supplies power to the low-voltage three-phase power supply terminals LU2, LV2 and LW2.

[0081] See also Fig. 9As shown, in another embodiment of the present invention, when the constant power supply KL30 is powered first, the constant power supply KL30 directly powers the electronic induction brake system SBC, and the constant power supply KL30 directly powers the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-to-DC circuit DC / DC1, and directly powers the high-voltage three-phase power supply terminals HU2, HV2 and HW2 through the fifth DC-to-DC circuit DC / DC5. At the same time, the constant power supply KL30 powers the rotary transformer Resolver through the isolation device (the fourth DC-to-DC circuit DC / DC4), and the constant power supply KL30 powers the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the isolation device (the fourth DC-to-DC circuit DC / DC4) and the second DC-to-DC circuit DC / DC2, and powers the low-voltage three-phase power supply terminals LU2, LV2 and LW2 through the isolation device (the fourth DC-to-DC circuit DC / DC4) and the sixth DC-to-DC circuit DC / DC6. When the high-voltage backup power supply is powered on, the voltage outputted by the second voltage output terminal Vo2 of the high-voltage backup power supply is greater than the output voltage of the isolation device (the fourth DC-to-DC circuit DC / DC4). At this time, the normal power supply KL30 still directly supplies power to the electronic induction brake system SBC, and the normal power supply KL30 directly supplies power to the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-to-DC circuit DC / DC1, and directly supplies power to the high-voltage three-phase power supply terminals HU2, HV2 and HW2 through the fifth DC-to-DC circuit DC / DC5. The normal power supply KL30 supplies power to the rotary transformer Resolver through the isolation device (the fourth DC-to-DC circuit DC / DC4). The second diode D2 set between the isolation device (the fourth DC-to-DC circuit DC / DC4) and the second DC-to-DC circuit DC / DC2 is reversely cut off, and the normal power supply KL30 cannot supply power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1, but the second voltage output terminal Vo2 of the high-voltage backup power supply is used to supply power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1. The sixth diode D6 disposed between the isolation device (the fourth DC-to-DC circuit DC / DC4) and the sixth DC-to-DC circuit DC / DC6 is reversely cut off, and the normal power supply KL30 cannot supply power to the low-voltage three-phase power supply terminals LU2, LV2, and LW2, but the second voltage output terminal Vo2 of the high-voltage backup power supply supplies power to the low-voltage three-phase power supply terminals LU2, LV2, and LW2. When the normal power supply KL30 is lost, the first control switch S1 is first disconnected, and then the second control switch S2 is closed to prevent the high-voltage backup power supply from backflowing current to the normal power supply KL30.Afterwards, the first voltage output terminal Vo1 of the high-voltage backup power supply outputs the first voltage, and supplies power to the electronic induction brake system SBC through the second control switch S2 and the fifth diode D5, supplies power to the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the second control switch S2, the first diode D1 and the first DC-DC circuit DC / DC1, and supplies power to the high-voltage three-phase power supply terminals HU2, HV2 and HW2 through the second control switch S2, the first diode D1 and the fifth DC-DC circuit DC / DC5. At the same time, the first voltage output terminal Vo1 of the high-voltage backup power supply supplies power to the rotary transformer Resolver through the second control switch S2, the first diode D1 and the isolation device (the fourth DC-DC circuit DC / DC4). The second voltage output terminal Vo2 of the high-voltage backup power supply supplies power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the third diode D3, and the second voltage output terminal Vo2 of the high-voltage backup power supply supplies power to the low-voltage three-phase power supply terminals LU2, LV2 and LW2 through the seventh diode D3.

[0082] See also Figure 6 As shown, in another embodiment of the present invention, when the rear stage of the second control switch S2 is short-circuited, for example, the electronic induction brake system SBC is short-circuited to the ground or the rear stage of the first control switch S1 is short-circuited to the ground. First, the second control switch S2 is controlled to be closed, and the first voltage output terminal Vo1 of the high-voltage backup power supply is pulled low. At this time, the second control switch S2 is controlled to be disconnected to prevent the second voltage output terminal Vo2 of the high-voltage backup power supply from being pulled low, so that the second DC-to-DC circuit DC / DC2 and the sixth DC-to-DC circuit DC / DC6 cannot work, thereby causing the two motor controllers to be unable to enter the emergency state of the inverter lower bridge. After a period of time, if the port of the normal power supply KL30 is still undervoltage, the second control switch S2 is closed again, and the second control switch S2 is disconnected again after the first voltage output terminal Vo1 of the high-voltage backup power supply is pulled low. After that, the second control switch S2 is executed in a periodic operation of first closing and then disconnecting.

[0083] Example 3

[0084] See also Fig.10As shown, in another embodiment of the present invention, two motor controllers are provided in the vehicle, one of which is a motor controller of a generator, and the other is a motor controller of a motor. The high-voltage power supply end of the motor controller of the motor includes high-voltage three-phase power supply terminals HU1, HV1 and HW1, and the low-voltage power supply end of the motor controller of the motor includes low-voltage three-phase power supply terminals LU1, LV1 and LW1. The high-voltage power supply end of the motor controller of the generator includes high-voltage three-phase power supply terminals HU2, HV2 and HW2, and the low-voltage power supply end of the motor controller of the generator includes low-voltage three-phase power supply terminals LU2, LV2 and LW2. In the power supply circuit of the motor controller provided in the present application, the first power supply branch is the high-voltage three-phase power supply terminals HU1, HV1 and HW1, and the high-voltage three-phase power supply terminals HU2, HV2 and HW2 are powered, and the second power supply branch is the low-voltage three-phase power supply terminals LU1, LV1 and LW1, the low-voltage three-phase power supply terminals LU2, LV2 and LW2 and power supply. The isolation device is, for example, a control switch.

[0085] See also Fig.10As shown, in another embodiment of the present invention, in order to ensure the voltage stability of each power supply terminal, in the power supply circuit of the motor controller provided in the present application, a DC-to-DC circuit is provided at the front end of the high-voltage three-phase power supply terminals HU1, HV1 and HW1, the low-voltage three-phase power supply terminals LU1, LV1 and LW1, the high-voltage three-phase power supply terminals HU2, HV2 and HW2, and the low-voltage three-phase power supply terminals LU2, LV2 and LW2. And at least one DC-to-DC circuit is provided at the front end of the high-voltage three-phase power supply terminals HU1, HV1 and HW1, and the high-voltage three-phase power supply terminals HU2, HV2 and HW2, and at least one DC-to-DC circuit is provided at the front end of the low-voltage three-phase power supply terminals LU1, LV1 and LW1, and the low-voltage three-phase power supply terminals LU2, LV2 and LW2. In this embodiment, a first DC-to-DC circuit DC / DC1 is provided at the front end of the high-voltage three-phase power supply terminals HU1, HV1 and HW1, that is, the output end of the first DC-to-DC circuit DC / DC1 is electrically connected to the high-voltage three-phase power supply terminals HU1, HV1 and HW1. A second DC-to-DC circuit DC / DC2 is provided at the front end of the low-voltage three-phase power supply terminals LU1, LV1 and LW1, that is, the output end of the second DC-to-DC circuit DC / DC2 is electrically connected to the low-voltage three-phase power supply terminals LU1, LV1 and LW1. A fifth DC-to-DC circuit DC / DC5 is provided at the front end of the high-voltage three-phase power supply terminals HU2, HV2 and HW2, that is, the output end of the fifth DC-to-DC circuit DC / DC5 is electrically connected to the high-voltage three-phase power supply terminals HU2, HV2 and HW2. A sixth DC-to-DC circuit DC / DC6 is provided at the front end of the low-voltage three-phase power supply terminals LU2, LV2 and LW2, that is, the output end of the sixth DC-to-DC circuit DC / DC6 is electrically connected to the low-voltage three-phase power supply terminals LU2, LV2 and LW2. In other embodiments, three first DC-to-DC circuits DC / DC1 are provided at the front end of the high-voltage three-phase power supply terminals HU1, HV1 and HW1, and the output end of each first DC-to-DC circuit DC / DC1 is electrically connected to one of the high-voltage three-phase power supply terminals HU1, HV1 and HW1. Three second DC-to-DC circuits DC / DC2 are provided at the front end of the low-voltage three-phase power supply terminals LU1, LV1 and LW1, and the output end of each second DC-to-DC circuit DC / DC2 is electrically connected to one of the low-voltage three-phase power supply terminals LU1, LV1 and LW1. Three fifth DC-to-DC circuits DC / DC5 are arranged at the front end of the high-voltage three-phase power supply terminals HU2, HV2 and HW2, and the output end of each fifth DC-to-DC circuit DC / DC5 is electrically connected to one of the high-voltage three-phase power supply terminals HU2, HV2 and HW2.Three sixth DC-to-DC circuits DC / DC6 are arranged at the front end of the low-voltage three-phase power supply terminals LU2, LV2 and LW2, and the output end of each sixth DC-to-DC circuit DC / DC6 is electrically connected to one of the low-voltage three-phase power supply terminals LU2, LV2 and LW2.

[0086] See also Fig.10 As shown, in another embodiment of the present invention, in the power supply circuit of the motor controller, the power supply includes a normal power supply KL30 and a high-voltage backup power supply, and correspondingly, the control switch includes a first control switch S1 and a second control switch S2. The first control switch S1 is arranged between the normal power supply KL30 and the high-voltage power supply terminal of the motor controller, and the second control switch S2 is arranged between the voltage output terminal of the high-voltage backup power supply and the high-voltage power supply terminal of the motor controller.

[0087] See also Fig.10 As shown, in another embodiment of the present invention, the permanent power supply KL30 is directly connected to the positive pole of the vehicle battery to provide a stable power supply for the electronic control unit. And the permanent power supply KL30 is not affected by the key switch, and is always powered to supply power to electronic equipment that requires continuous power supply. The high-voltage backup power supply includes a DC-to-DC circuit, namely the third DC-to-DC circuit DC / DC3. The third DC-to-DC circuit DC / DC3 converts the voltage BUS+ output by the vehicle battery into a first voltage required by the high-voltage power supply end of the motor controller, and a second voltage required by the low-voltage power supply end of the motor controller. The corresponding third DC-to-DC circuit DC / DC3 has a first voltage output terminal Vo1 and a second voltage output terminal Vo2, the first voltage output terminal Vo1 outputs a first voltage, and the second voltage output terminal Vo2 outputs a second voltage.

[0088] See also Fig.10As shown, in another embodiment of the present invention, one end of the first control switch S1 is electrically connected to the normal power supply KL30, and the other end is electrically connected to the input end of the first DC-to-DC circuit DC / DC1 and the input end of the fifth DC-to-DC circuit DC / DC5. When the first control switch S1 is closed, the normal power supply KL30 supplies power to the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-to-DC circuit DC / DC1, and supplies power to the high-voltage three-phase power supply terminals HU2, HV2 and HW2 through the fifth DC-to-DC circuit DC / DC5. One end of the second control switch S2 is electrically connected to the first voltage output terminal Vo1 of the high-voltage backup power supply, and the other end is electrically connected to the input end of the first DC-to-DC circuit DC / DC1 and the input end of the fifth DC-to-DC circuit DC / DC5. When the second control switch S2 is closed, the high-voltage backup power supply supplies power to the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the second DC-to-DC circuit DC / DC2, and supplies power to the high-voltage three-phase power supply terminals HU2, HV2 and HW2 through the fifth DC-to-DC circuit DC / DC5. A first diode D1 is also provided in the power supply circuit. The positive pole of the first diode D1 is electrically connected to the other end of the second control switch S2, and the negative pole is electrically connected to the end where the isolation device and the first control switch S1 are connected, i.e., the input end of the first DC-to-DC circuit DC / DC1, to avoid current backflow.

[0089] See also Fig.10 As shown, in another embodiment of the present invention, a top control switch S4 is further provided between the first control switch S1 and the isolation device, and the top control switch S4 is provided in the opposite direction to the first control switch S1. That is, when both the first control switch S1 and the top control switch S4 are PMOS, the source of the first control switch S1 is connected to the source of the top control switch S4, the drain of the first control switch S1 is electrically connected to the constant power supply KL30, and the drain of the top control switch S4 is electrically connected to the isolation device. When the system is not awakened, the top control switch S4 can be provided to disconnect the circuit at the rear end of the first control switch S1 to reduce the static current.

[0090] See also Fig.10As shown, in another embodiment of the present invention, the isolation device is a control switch, and is a third control switch S3. The third control switch S3 is connected in series between the control switch and the low-voltage power supply end of the motor controller, that is, the voltage input end of the third control switch S3 is electrically connected to the common end of the first control switch S1 and the first diode D1. When the first control switch S1 is closed and the isolation device (the third control switch S3) is turned on, the normal power supply KL30 supplies power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the isolation device (the third control switch S3) and the second DC-to-DC circuit DC / DC2, and supplies power to the low-voltage three-phase power supply terminals LU2, LV2 and LW2 through the isolation device (the third control switch S3) and the sixth DC-to-DC circuit DC / DC6. When the second control switch S2 is closed and the isolation device (third control switch S3) is turned on, the first voltage output terminal Vo1 of the high-voltage backup power supply supplies power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the isolation device (third control switch S3) and the second DC-to-DC circuit DC / DC2, and supplies power to the low-voltage three-phase power supply terminals LU2, LV2 and LW2 through the isolation device (third control switch S3) and the sixth DC-to-DC circuit DC / DC6.

[0091] See also Fig.10 As shown, in another embodiment of the present invention, when the isolation device is the third control switch S3, the rotary transformer Resolver is arranged at the rear end of any circuit with stable voltage in the power supply circuit, for example, it can be arranged at the voltage output end of the subsequent electronic induction braking system, or the voltage output end of the first DC-to-DC circuit DC / DC1, the second DC-to-DC circuit DC / DC2, the third DC-to-DC circuit DC / DC3, the fifth DC-to-DC circuit DC / DC5 or the sixth DC-to-DC circuit DC / DC6.

[0092] See also Fig.10 As shown, in another embodiment of the present invention, the isolation device (third control switch S3) can be any control switch such as a triode or a PMOS tube. When controlling the control end of the isolation device (third control switch S3), if the speed of the motor is greater than a low speed, for example, 100rpm / h, the isolation device (third control switch S3) is disconnected, which can ensure that when the input ends of the second DC-to-DC circuit DC / DC2 and the sixth DC-to-DC circuit DC / DC6 are short-circuited, the input voltages of the first DC-to-DC circuit DC / DC1 and the fifth DC-to-DC circuit DC / DC5 will not be pulled down. Therefore, the third control switch S3 can be used instead of the DC-to-DC circuit as an isolation device, and the power supply architecture of the power supply circuit can be further simplified and the cost can be reduced under the premise of meeting the system design requirements.

[0093] See also Fig.10As shown, in another embodiment of the present invention, a circuit protection device (not shown in the figure) is connected in series at one end of the third control switch S3, and the circuit protection device can be a fuse or an overcurrent protection circuit. The circuit protection device can be connected in series at one end of the third control switch S3 close to the power supply, or it can be set at one end close to the motor controller, and it is ensured that the circuit protection device is connected in series with the third control switch S3. At this time, when the input ends of the second DC-to-DC circuit DC / DC2 and the sixth DC-to-DC circuit DC / DC6 are short-circuited, the circuit protection device is disconnected, and the input voltage of the first DC-to-DC circuit DC / DC1 and the fifth DC-to-DC circuit DC / DC5 will not be pulled down. At this time, there is no need to couple the third control switch S3 with the motor speed control.

[0094] See also Fig.10 As shown, in another embodiment of the present invention, the second voltage output terminal Vo2 of the high-voltage backup power supply is electrically connected to the input terminals of the second DC-to-DC circuit DC / DC2 and the sixth DC-to-DC circuit DC / DC6, and the low-voltage three-phase power supply terminals LU1, LV1 and LW1 are powered by the second DC-to-DC circuit DC / DC2, and the low-voltage three-phase power supply terminals LU2, LV2 and LW2 are powered by the sixth DC-to-DC circuit DC / DC6. At the same time, a second diode D2 is provided between the isolation device (third control switch S3) and the second DC-to-DC circuit DC / DC2, and a third diode D3 is provided between the second voltage output terminal Vo2 of the high-voltage backup power supply and the second DC-to-DC circuit DC / DC2. A sixth diode D6 is provided between the isolation device (third control switch S3) and the sixth DC-to-DC circuit DC / DC6, and a seventh diode D7 is provided between the second voltage output terminal Vo2 of the high-voltage backup power supply and the sixth DC-to-DC circuit DC / DC6. Specifically, the positive electrode of the second diode D2 is electrically connected to the output end of the isolation device (third control switch S3), and the negative electrode is electrically connected to the input end of the second DC-to-DC circuit DC / DC2. The positive electrode of the third diode D3 is electrically connected to the second voltage output end Vo2 of the high-voltage backup power supply, and the negative electrode is electrically connected to the input end of the second DC-to-DC circuit DC / DC2. The positive electrode of the sixth diode D6 is electrically connected to the output end of the isolation device (third control switch S3), and the negative electrode is electrically connected to the input end of the sixth DC-to-DC circuit DC / DC6. The positive electrode of the seventh diode D7 is electrically connected to the second voltage output end Vo2 of the high-voltage backup power supply, and the negative electrode is electrically connected to the input end of the sixth DC-to-DC circuit DC / DC6. The second diode D2 and the sixth diode D6 can prevent the current from flowing back to the second voltage output end Vo2 of the high-voltage backup power supply, and the third diode D3 and the seventh diode D7 can prevent the current from flowing back to the first voltage output end Vo1 of the normal power supply KL30 or the high-voltage backup power supply.

[0095] See also Fig.10 As shown, in another embodiment of the present invention, the power supply circuit of the motor controller provided in the present application also includes an electronic induction brake system (Sensotronic Brake Control, SBC). The electronic induction brake system SBC is electrically connected to the voltage output end of the normal power supply KL30 and the high-voltage backup power supply. Specifically, the voltage input end of the electronic induction brake system SBC is electrically connected to the normal power supply KL30, and the common end of the second control switch S2 and the first diode D1 at the rear end of the first voltage output end Vo1 of the high-voltage backup power supply. Therefore, both the normal power supply KL30 and the high-voltage backup power supply can supply power to the electronic induction brake system SBC.

[0096] See also Fig.10 As shown, in another embodiment of the present invention, a fourth diode D4 is connected in series between the electronic induction braking system SBC and the normal power supply KL30, and a fifth diode D5 is connected in series between the electronic induction braking system SBC and the high-voltage backup power supply. Specifically, the positive pole of the fourth diode D4 is electrically connected to the normal power supply KL30, and the negative pole is electrically connected to the voltage input terminal of the electronic induction braking system SBC. The positive pole of the fifth diode D5 is electrically connected to the common end of the second control switch S2 and the first diode D1, and the negative pole is electrically connected to the voltage input terminal of the electronic induction braking system SBC. The setting of the fourth diode D4 and the fifth diode D5 can prevent the normal power supply KL30 and the high-voltage backup power supply from backflowing at the voltage input terminal of the electronic induction braking system SBC.

[0097] See also Fig.10 As shown, in another embodiment of the present invention, a microcontroller unit (MCU) and a CAN bus or other device are also provided at the voltage output end of the electronic induction brake system SBC, and the electronic induction brake system SBC is used to power the microcontroller unit MCU, the CAN bus or other devices.

[0098] See also Fig.11As shown, in another embodiment of the present invention, when only the normal power supply KL30 is powered, the normal power supply KL30 directly powers the electronic induction brake system SBC, and the normal power supply KL30 directly powers the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-to-DC circuit DC / DC1, and directly powers the high-voltage three-phase power supply terminals HU2, HV2 and HW2 through the fifth DC-to-DC circuit DC / DC5. At the same time, the normal power supply KL30 powers the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the isolation device (third control switch S3) and the second DC-to-DC circuit DC / DC2, and powers the low-voltage three-phase power supply terminals LU2, LV2 and LW2 through the isolation device (third control switch S3) and the sixth DC-to-DC circuit DC / DC6.

[0099] See also Fig.12As shown, in another embodiment of the present invention, when the normal power supply KL30 is powered on first and then the high-voltage backup power supply is powered on, the power supply circuit works as follows. Specifically, when the normal power supply KL30 is powered on first, the normal power supply KL30 directly powers the electronic induction brake system SBC, and the normal power supply KL30 directly powers the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-to-DC circuit DC / DC1, and directly powers the high-voltage three-phase power supply terminals HU2, HV2 and HW2 through the fifth DC-to-DC circuit DC / DC5. At the same time, the normal power supply KL30 powers the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the isolation device (third control switch S3) and the second DC-to-DC circuit DC / DC2, and powers the low-voltage three-phase power supply terminals LU2, LV2 and LW2 through the isolation device (third control switch S3) and the sixth DC-to-DC circuit DC / DC6. When the high-voltage backup power supply is powered on, the voltage outputted by the second voltage output terminal Vo2 of the high-voltage backup power supply is greater than the output voltage of the isolation device (third control switch S3). At this time, the normal power supply KL30 still directly supplies power to the electronic induction brake system SBC, and the normal power supply KL30 directly supplies power to the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-to-DC circuit DC / DC1, and directly supplies power to the high-voltage three-phase power supply terminals HU2, HV2 and HW2 through the fifth DC-to-DC circuit DC / DC5. The second diode D2 set between the isolation device (third control switch S3) and the second DC-to-DC circuit DC / DC2 is reversely cut off, and the normal power supply KL30 cannot supply power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1, but supplies power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the second voltage output terminal Vo2 of the high-voltage backup power supply. The sixth diode D6 arranged between the isolation device (the third control switch S3) and the sixth DC-to-DC circuit DC / DC6 is reverse cut off, and the normal power supply KL30 cannot supply power to the low-voltage three-phase power supply terminals LU2, LV2 and LW2. Instead, the second voltage output terminal Vo2 of the high-voltage backup power supply supplies power to the low-voltage three-phase power supply terminals LU2, LV2 and LW2.

[0100] See also Fig.13As shown, in another embodiment of the present invention, when the permanent power supply KL30 is powered first, the permanent power supply KL30 directly powers the electronic induction brake system SBC, and the permanent power supply KL30 directly powers the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-to-DC circuit DC / DC1, and directly powers the high-voltage three-phase power supply terminals HU2, HV2 and HW2 through the fifth DC-to-DC circuit DC / DC5. At the same time, the permanent power supply KL30 powers the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the isolation device (third control switch S3) and the second DC-to-DC circuit DC / DC2, and powers the low-voltage three-phase power supply terminals LU2, LV2 and LW2 through the isolation device (third control switch S3) and the sixth DC-to-DC circuit DC / DC6. When the high-voltage backup power supply is powered on, the voltage outputted by the second voltage output terminal Vo2 of the high-voltage backup power supply is greater than the output voltage of the isolation device (third control switch S3). At this time, the normal power supply KL30 still directly supplies power to the electronic induction brake system SBC, and the normal power supply KL30 directly supplies power to the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the first DC-to-DC circuit DC / DC1, and directly supplies power to the high-voltage three-phase power supply terminals HU2, HV2 and HW2 through the fifth DC-to-DC circuit DC / DC5. The second diode D2 set between the isolation device (third control switch S3) and the second DC-to-DC circuit DC / DC2 is reversely cut off, and the normal power supply KL30 cannot supply power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1, but supplies power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the second voltage output terminal Vo2 of the high-voltage backup power supply. The sixth diode D6 set between the isolation device (third control switch S3) and the sixth DC-DC circuit DC / DC6 is reversely cut off, and the normal power supply KL30 cannot supply power to the low-voltage three-phase power supply terminals LU2, LV2 and LW2, but the second voltage output terminal Vo2 of the high-voltage backup power supply supplies power to the low-voltage three-phase power supply terminals LU2, LV2 and LW2. When the normal power supply KL30 is lost, the first control switch S1 is first disconnected, and then the second control switch S2 is closed to prevent the high-voltage backup power supply from backflowing current to the normal power supply KL30. Afterwards, the first voltage output terminal Vo1 of the high-voltage backup power supply outputs the first voltage, and powers the electronic induction braking system SBC through the second control switch S2 and the fifth diode D5, and powers the high-voltage three-phase power supply terminals HU1, HV1 and HW1 through the second control switch S2, the first diode D1 and the first DC-to-DC circuit DC / DC1, and powers the high-voltage three-phase power supply terminals HU2, HV2 and HW2 through the second control switch S2, the first diode D1 and the fifth DC-to-DC circuit DC / DC5.The second voltage output terminal Vo2 of the high-voltage backup power supply is input to supply power to the low-voltage three-phase power supply terminals LU1, LV1 and LW1 through the third diode D3, and the second voltage output terminal Vo2 of the high-voltage backup power supply is input to supply power to the low-voltage three-phase power supply terminals LU2, LV2 and LW2 through the seventh diode D3.

[0101] See also Fig.10 As shown, in another embodiment of the present invention, when the rear stage of the second control switch S2 is short-circuited, for example, the electronic induction brake system SBC is short-circuited to the ground or the rear stage of the first control switch S1 is short-circuited to the ground. First, the second control switch S2 is controlled to be closed, and the first voltage output terminal Vo1 of the high-voltage backup power supply is pulled low. At this time, the second control switch S2 is controlled to be disconnected to prevent the second voltage output terminal Vo2 of the high-voltage backup power supply from being pulled low, so that the second DC-to-DC circuit DC / DC2 and the sixth DC-to-DC circuit DC / DC6 cannot work, thereby causing the two motor controllers to be unable to enter the emergency state of the inverter lower bridge. After a period of time, if the port of the normal power supply KL30 is still undervoltage, the second control switch S2 is closed again, and the second control switch S2 is disconnected again after the first voltage output terminal Vo1 of the high-voltage backup power supply is pulled low. After that, the second control switch S2 is executed in a periodic operation of first closing and then disconnecting.

[0102] See also Fig.14 As shown, an embodiment of the present application further provides an electronic device 10, comprising a memory 11, a processor 12, and a program stored in the memory and executable on the processor, wherein the processor implements the steps of any of the above methods when executing the program.

[0103] Among them, the memory includes at least one type of readable storage medium, and the readable storage medium includes flash memory, mobile hard disk, multimedia card, card-type memory (for example: SD or DX memory, etc.), magnetic memory, disk, optical disk, etc. The memory can be an internal storage unit of an electronic device in some embodiments, such as a mobile hard disk of the electronic device. The memory can also be an external storage device of an electronic device in other embodiments, such as a plug-in mobile hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the electronic device. Further, the memory can also include both an internal storage unit of the electronic device and an external storage device. The memory can be used not only to store application software and various types of data installed in the electronic device, but also to temporarily store data that has been output or is to be output.

[0104] In some embodiments, the processor may be composed of an integrated circuit, for example, a single packaged integrated circuit, or a plurality of packaged integrated circuits with the same or different functions, including one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and a combination of various control chips. The processor is the control core (Control Unit) of the electronic device, and uses various interfaces and lines to connect the various components of the entire electronic device, and executes various functions of the electronic device and processes data by running or executing programs or modules stored in the memory, and calling data stored in the memory.

[0105] The processor executes the operating system of the electronic device and various installed application programs. The processor executes the application programs to implement the steps in the above method embodiment.

[0106] Exemplarily, the program may be divided into one or more modules, which are stored in the memory and executed by the processor to complete the present invention. The one or more modules may be a series of program instruction segments capable of completing specific functions, which are used to describe the execution process of the program in the electronic device.

[0107] The above-mentioned integrated unit implemented in the form of a software function module can be stored in a computer-readable storage medium. The above-mentioned software function module is stored in a storage medium, and includes a number of instructions for enabling a computer device (which can be a personal computer, a computer device, or a network device, etc.) or a processor to perform part of the functions of the lithium battery cold solder joint detection method of each embodiment of the present invention.

[0108] In summary, the present invention provides a power supply circuit and vehicle for a motor controller, including a power supply, a first power supply branch and a second power supply branch. The first power supply branch includes a control switch, which is connected in series between the power supply and the high-voltage side power supply end of the motor controller. When the control switch is closed, the power supply supplies power to the high-voltage side power supply end of the motor controller. The second power supply branch includes an isolation device, which is connected in series between the control switch and the low-voltage side power supply end of the motor controller. When the control switch and the isolation device are closed at the same time, the power supply supplies power to the low-voltage side power supply end of the motor controller. The power supply circuit and vehicle for the motor controller provided in the present application can ensure that the vehicle enters a safe state and meets the requirements of ASIL C / D. At the same time, the cost of the backup power supply is greatly reduced, the volume of the power supply is reduced, and the power supply architecture is further simplified to optimize the cost.

[0109] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A power supply circuit for a motor controller, characterized in that: At least: Power supply; A first power supply branch includes a control switch, wherein the control switch is connected in series between the power supply and the high-voltage side power supply terminal of the motor controller, and when the control switch is closed, the power supply supplies power to the high-voltage side power supply terminal of the motor controller; as well as The second power supply branch includes an isolation device, which is connected in series between the control switch and the low-voltage side power supply end of the motor controller. When the control switch and the isolation device are closed at the same time, the power supply supplies power to the low-voltage side power supply end of the motor controller.

2. A power supply circuit for a motor controller according to claim 1, characterized in that: The power supply circuit supplies power to at least one of the motor controllers.

3. A power supply circuit for a motor controller according to claim 1, characterized in that: At the front end of the high-voltage side power supply end or the low-voltage side power supply end of each of the motor controllers, at least one DC-to-DC circuit is provided, and one DC-to-DC circuit supplies power to the front end of a group of high-voltage side power supply ends or a group of low-voltage side power supply ends, or one DC-to-DC circuit supplies power to one of the three-phase power supply terminals in the front end power supply of a group of high-voltage side power supply ends or a group of low-voltage side power supply ends.

4. A power supply circuit for a motor controller according to claim 1, characterized in that: The power supply includes a normal power supply, and the control switch includes a first control switch, which is connected in series between the normal power supply and a high-voltage side power supply terminal of the motor controller.

5. A power supply circuit for a motor controller according to claim 4, characterized in that: The power supply circuit includes a top control switch, which is arranged between the first control switch and the isolation device, and the top control switch is arranged in the opposite direction to the first control switch.

6. A power supply circuit for a motor controller according to claim 4, characterized in that: The power supply includes a high-voltage backup power supply, and the control switch includes a second control switch, which is connected in series between the high-voltage backup power supply and a high-voltage side power supply terminal of the motor controller.

7. A power supply circuit for a motor controller according to claim 6, characterized in that: The power supply circuit includes a diode, an anode of the diode is electrically connected to the second control switch, and a cathode of the diode is electrically connected to one end of the isolation device connected to the first control switch.

8. The power supply circuit of a motor controller according to claim 6, characterized in that: The high-voltage backup power supply includes a DC-to-DC circuit, which has a first voltage output terminal and a second voltage output terminal. The DC-to-DC circuit inputs the voltage output by the vehicle battery, the first voltage output terminal is electrically connected to the second control switch, and the second voltage output terminal is electrically connected to the low-voltage side power supply terminal of the motor controller.

9. A power supply circuit for a motor controller according to claim 8, characterized in that: A diode is connected in series between the isolation device and the low-voltage power supply terminal of each motor controller, the positive pole of the diode is electrically connected to the output terminal of the isolation device, and the negative pole of the diode is electrically connected to the low-voltage power supply terminal of the motor controller.

10. The power supply circuit of a motor controller according to claim 8, characterized in that: A diode is connected in series between the second voltage output terminal and the low-voltage side power supply terminal of each motor controller, the positive pole of the diode is electrically connected to the second voltage output terminal, and the negative pole of the diode is electrically connected to the low-voltage side power supply terminal of the motor controller.

11. A power supply circuit for a motor controller according to claim 6, characterized in that: The isolation device is a DC-to-DC power supply circuit.

12. A power supply circuit for a motor controller according to claim 11, characterized in that: The output end of the isolation device is electrically connected to the voltage input end of the rotary transformer.

13. A power supply circuit for a motor controller according to claim 12, characterized in that: The power supply circuit includes an electronic induction braking system, and the electronic induction braking system is electrically connected to the output ends of the normal power supply and the high-voltage backup power supply.

14. The power supply circuit of a motor controller according to claim 6, characterized in that: The isolation device is a third control switch.

15. A power supply circuit for a motor controller according to claim 14, characterized in that: The third control switch is a triode or a PMOS tube.

16. A power supply circuit for a motor controller according to claim 14, characterized in that: The power supply circuit includes an electronic induction braking system, which is electrically connected to the output ends of the normal power supply and the high-voltage backup power supply, and the output end of the electronic induction braking system is electrically connected to a rotary transformer.

17. A power supply circuit for a motor controller according to claim 14, characterized in that: The power supply circuit includes a circuit protection device, and the circuit protection device is connected in series to the control switch.

18. An electric vehicle, characterized in that: A power supply circuit comprising a motor controller as claimed in any one of claims 1 to 17.

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