Power supply circuit, all-in-one motor controller and integrated equipment

Abstract

The utility model discloses a power supply circuit, an all-in-one motor controller and integrated equipment, and belongs to the technical field of power electronics. One embodiment of the utility model provides a power supply circuit. The power supply circuit comprises a power supply main loop, a plurality of power supply branches, a plurality of detection circuits and a control unit. The input end of the power supply main loop is connected with a power supply, the output end is connected with the input ends of the power supply branches, and each power supply branch is provided with a first switch; the input end of the detection circuit is connected with the power supply branch, detects electrical parameters of the power supply branch and outputs a detection signal; the control unit is provided with a plurality of input ends and a plurality of output ends, the input ends of the control unit are correspondingly connected with the output ends of the detection circuits, and the output ends of the control unit are correspondingly connected with the driving ends of the first switches; the control unit is configured to control the first switches to be turned on or turned off, each power supply branch is independently controlled by the main control unit, and it is avoided that faults of a certain power supply branch affect other power supply branches.

Description

Technical Field

[0001] The present application belongs to the field of power electronics technology, and in particular relates to a power supply circuit, an all-in-one motor controller and an integrated device. Background Art

[0002] Integrated equipment usually includes multiple loads. The power supply circuit of the integrated equipment is usually equipped with multiple power supply branches, each of which is connected to the corresponding load, and the load is powered by the power of the power supply. After multiple power supply branches are connected in parallel, they are connected to the master control switch, and the master control switch is connected to the power supply. When the master control switch is turned on, all power supply branches supply power to the corresponding loads at the same time. When a load connected to a power supply branch fails, it will affect the normal operation of the loads connected to other power supply branches. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a power supply circuit, an all-in-one motor controller and an integrated device, each power supply branch is independently controlled by a main control unit to avoid the influence of a power supply branch failure on other power supply branches.

[0004] In a first aspect, the present application provides a power supply circuit, comprising:

[0005] The main power supply circuit, the input end of which is used to access the power supply;

[0006] A plurality of power supply branches, the input end of each power supply branch is electrically connected to the output end of the power supply main circuit, and each power supply branch is provided with a first switch;

[0007] A plurality of detection circuits, wherein the input end of the detection circuit is electrically connected to the power supply branch and is configured to detect electrical parameters of the power supply branch and output a detection signal;

[0008] A control unit, the control unit having a plurality of input terminals and a plurality of output terminals, each input terminal of the control unit being electrically connected to an output terminal of each detection circuit in a one-to-one correspondence, and each output terminal of the control unit being electrically connected to a driving terminal of each first switch in a one-to-one correspondence;

[0009] The control unit is configured to control each first switch to be turned on or off.

[0010] According to the power supply circuit of the present application, each power supply branch is provided with an independent first switch, and each power supply branch is electrically connected to a corresponding current detection circuit. After the power supply circuit is powered on, each detection circuit detects the electrical parameters of the corresponding power supply branch. When a power supply branch fails, the main control unit controls the first switch corresponding to the power supply branch to turn off. Each power supply branch is independently controlled by the main control unit to prevent a failure of a power supply branch from affecting other power supply branches.

[0011] According to one embodiment of the present application, the electrical parameter includes voltage and / or current, and the detection circuit includes:

[0012] a voltage detection circuit, wherein an input end of the voltage detection circuit is electrically connected to the power supply branch and is configured to detect the voltage of the power supply branch and output a voltage detection signal; and / or,

[0013] The current detection circuit has an input end electrically connected to the power supply branch and is configured to detect the current of the power supply branch and output a current detection signal.

[0014] According to one embodiment of the present application, the voltage detection circuit includes:

[0015] a second switch, wherein a first end of the second switch is electrically connected to an output end of the main power supply circuit, and a driving end of the second switch is electrically connected to an output end of the control unit;

[0016] a first resistor, wherein a first end of the first resistor is electrically connected to a second end of the second switch, and a second end of the first resistor is electrically connected to the power supply branch;

[0017] A voltage divider circuit, wherein an input end of the first voltage divider circuit is electrically connected to the second end of the first resistor, and an output end of the first voltage divider circuit is electrically connected to the second input end of the control unit.

[0018] According to one embodiment of the present application, the power supply end of the control unit is electrically connected to the output end of the main power supply circuit.

[0019] According to one embodiment of the present application, the current detection circuit includes:

[0020] A second resistor is arranged in the power supply branch;

[0021] A differential operational amplifier circuit, wherein the positive phase input terminal of the differential operational amplifier circuit is electrically connected to an end of the second resistor close to the main power supply circuit, the negative phase input terminal of the differential operational amplifier circuit is electrically connected to an end of the second resistor away from the main power supply circuit, and the output terminal of the differential operational amplifier circuit is electrically connected to the first input terminal of the control unit.

[0022] According to one embodiment of the present application, the main power supply circuit includes:

[0023] A switch circuit, wherein the first end of the switch circuit is used to access a power supply, the second end of the switch circuit is electrically connected to each power supply branch, and the driving end of the switch circuit is used to access a power-on signal, and the power-on signal is used to drive the switch circuit to conduct.

[0024] According to one embodiment of the present application, the switch circuit includes:

[0025] A third switch, wherein a first end of the third switch is used to receive a trigger signal, a driving end of the third switch is used to receive a power-on signal, and the power-on signal is used to drive the third switch to turn on;

[0026] A fourth switch, wherein the first end of the fourth switch is used to access a power supply, the second end of the fourth switch is electrically connected to each power supply branch, the driving end of the fourth switch is electrically connected to the second end of the third switch, and the fourth switch is configured to be turned on upon receiving a trigger signal.

[0027] According to one embodiment of the present application, the switch circuit further includes:

[0028] An OR gate, wherein the first input terminal of the OR gate is connected to a power-on signal, the second input terminal of the OR gate is used to connect a power-off delay signal when the power-on signal fails, the output terminal of the OR gate is electrically connected to the driving terminal of the third switch, and the power-off delay signal is used to control the third switch to be turned on within the delay time.

[0029] According to one embodiment of the present application, the power supply circuit further includes:

[0030] The connector includes a power supply port, a drive port, a power-off delay port and a bus port, the power supply port is electrically connected to the first end of the fourth switch, the drive port and the power-off delay port are respectively electrically connected to the drive end of the second switch, and the bus port is electrically connected to the control unit through the CAN bus.

[0031] In a second aspect, the present application provides an all-in-one motor controller, which includes: the aforementioned power supply circuit and multiple sub-boards, and the output end of each power supply branch in the power supply circuit is electrically connected to the power supply end of each load.

[0032] In a third aspect, the present application provides an integrated device, which includes: the aforementioned power supply circuit and multiple loads, wherein the output end of each power supply branch in the power supply circuit is electrically connected to the power supply end of each load.

[0033] According to the integrated device of the present application, each power supply branch is provided with an independent first switch, and each power supply branch is electrically connected to a corresponding current detection circuit. After the power supply circuit is powered on, each detection circuit detects the electrical parameters of the corresponding power supply branch. When a power supply branch fails, the main control unit controls the first switch corresponding to the power supply branch to turn off. Each power supply branch is independently controlled by the main control unit to prevent a failure of a power supply branch from affecting other power supply branches.

[0034] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0036] Figure 1 is a schematic diagram of a power supply circuit of the related technology;

[0037] Figure 2 is a structural block diagram of a power supply circuit provided in an embodiment of the present application;

[0038] Figure 3 is a circuit diagram of a power supply circuit provided in an embodiment of the present application;

[0039] Figure 4 Schematic diagram of a current detection circuit and a voltage detection circuit provided in an embodiment of the present application.

[0040] Reference numerals:

[0041] A main power supply circuit 110, a switch circuit 111, a third switch 112, a fourth switch 113, a power supply branch 120, a first switch 121, a detection circuit 130, a current detection circuit 131, a differential operational amplifier circuit 132, a control unit 140, a voltage detection circuit 150, a second switch 151, a voltage divider circuit 152, an electromagnetic compatibility circuit 160, first to eighth resistors R1 to R8, loads RL1 to RLn, and a comparator A1. DETAILED DESCRIPTION

[0042] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0043] In the following description, "circuit" refers to a conductive loop composed of at least one element or subcircuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "coupled to" or "connected to" another element or an element / circuit is said to be "coupled to" or "connected to" two nodes, it can be directly coupled or connected to another element or there can be an intermediate element, and the connection between the elements can be physical, logical, or a combination thereof. On the contrary, when an element is said to be "directly coupled to" or "directly connected to" another element, it means that there is no intermediate element between the two.

[0044] In the description, the terms "first", "second", etc. are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the numerical descriptors used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0045] In addition, descriptions with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0046] Reference Figure 1 In the related art, an integrated device usually includes multiple loads. The power supply circuit of the integrated device is usually provided with multiple power supply branches 120. Each power supply branch 120 is connected to a corresponding load respectively, and uses the power of the power supply to supply power to the load. After multiple power supply branches 120 are connected in parallel, they are connected to a master control switch, and the master control switch is connected to the power supply. When the master control switch is turned on, all power supply branches 120 supply power to the corresponding loads at the same time. When a load connected to a power supply branch 120 fails, it will affect the normal operation of the loads connected to other power supply branches 120.

[0047] The present application proposes a power supply circuit, an all-in-one motor controller and an integrated device, wherein each power supply branch 120 is independently controlled by a main control unit to prevent an overcurrent in a power supply branch 120 from affecting other power supply branches 120 .

[0048] Reference Figure 2, an embodiment of the present application proposes a power supply circuit. The power supply circuit includes: a main power supply circuit 110, a plurality of power supply branches 120, a plurality of detection circuits 130 and a control unit 140. The input end of the main power supply circuit 110 is used to connect to the power supply; the input end of each power supply branch 120 is electrically connected to the output end of the main power supply circuit 110, and each power supply branch 120 is provided with a first switch 121; the input end of the detection circuit 130 is electrically connected to the power supply branch 120, and is configured to detect the electrical parameters of the power supply branch 120 and output a detection signal; the control unit 140 has a plurality of input ends and a plurality of output ends, each input end of the control unit 140 is electrically connected to the output end of each detection circuit 130 in a one-to-one correspondence, and each output end of the control unit 140 is electrically connected to the driving end of each first switch 121 in a one-to-one correspondence; the control unit 140 is configured to control each first switch 121 to be turned on or off.

[0049] The main power supply circuit 110 is mainly used to transmit the power of the power supply to each power supply branch 120. The input end of each power supply branch 120 is electrically connected to the output end of the main power supply circuit 110, and the output end of each power supply branch 120 can be electrically connected to the load.

[0050] Each power supply branch 120 is provided with a first switch 121, and the first switch 121 can be switched between two modes: on and off. When the main power supply circuit 110 is on and the first switch 121 of a power supply branch 120 is on, the electric energy provided by the power supply is transmitted to the load electrically connected to the power supply branch 120 through the main power supply circuit 110 and the power supply branch 120, so as to enable the load to work.

[0051] The first switch 121 can be a MOS (Metal-Oxide-Semiconductor Field-Effect Transistor), an IGBT (Insulate-Gate Bipolar Transistor) relay, etc. The specific type of the first switch 121 is not limited here and can be selected according to the actual application scenario.

[0052] Each power supply branch 120 is connected to an input terminal of the detection circuit 130 in a one-to-one correspondence, and an output terminal of the detection circuit 130 is connected to each first input terminal of the control unit 140 in a one-to-one correspondence. The detection circuit 130 is mainly used to detect the electrical parameters of the corresponding power supply branch 120, and the electrical parameters may be current or voltage, that is, the detection circuit 130 is mainly used to detect the voltage or current of the corresponding power supply branch 120, output a detection signal, and transmit the detection signal to the control unit 140.

[0053] The input end of the control unit 140 is electrically connected to each detection circuit 130, and the output end of the control unit 140 is electrically connected to each first switch 121. The control unit 140 is mainly used to drive the first switch 121 to disconnect when the detection signal output by the detection circuit 130 indicates that the corresponding power supply branch 120 has a fault such as overcurrent or disconnection.

[0054] As an example, the detection signal is a current signal. When the current value represented by the detection signal output by a detection circuit is greater than twice the rated current of the load, it indicates that the power supply branch 120 corresponding to the detection circuit 130 is overcurrent, and the control unit 140 controls the first switch 121 in the power supply branch 120 to be turned off.

[0055] In some embodiments, the detection signal can also be used to determine whether the power supply branch 120 is overloaded. When the current value represented by the detection signal output by a detection circuit is greater than 1.6 times the rated current of the load, it indicates that the power supply branch 120 corresponding to the detection circuit 130 is overloaded.

[0056] According to the power supply circuit of the present application, each power supply branch 120 is provided with an independent first switch 121, and each power supply branch 120 is electrically connected to a corresponding current detection circuit. After the power supply circuit is powered on, each detection circuit detects the electrical parameters of the corresponding power supply branch 120. When a power supply branch 120 fails, the main control unit controls the first switch 121 corresponding to the power supply branch 120 to be turned off. Each power supply branch 120 is independently controlled by the main control unit to prevent the failure of a power supply branch 120 from affecting other power supply branches 120.

[0057] Reference Figure 3 In some embodiments, the electrical parameters include voltage and / or current, and the detection circuit 130 includes: a voltage detection circuit 150 and / or a current detection circuit 131, the input end of the voltage detection circuit 150 is electrically connected to the power supply branch 120, and is configured to detect the voltage of the power supply branch 120 and output a voltage detection signal; the input end of the current detection circuit 131 is electrically connected to the power supply branch 120, and is configured to detect the current of the power supply branch 120 and output a current detection signal.

[0058] The detection circuit 130 includes a voltage detection circuit 150. The input end of each voltage detection circuit 150 is connected one-to-one with each power supply branch 120. The voltage detection circuit 150 is mainly used to detect the voltage of each power supply branch 120, output a voltage detection signal, and transmit the voltage detection signal to the control unit 140. The voltage detection signal can represent the state of each power supply branch 120. When the voltage detection signal represents that the power supply branch 120 is disconnected or overcurrent, the control unit drives the corresponding first switch 121 to turn off.

[0059] The detection circuit 130 includes a current detection circuit 131, the input end of the current detection circuit 131 is electrically connected to the power supply branch 120, and is configured to detect the current of the power supply branch 120, output a current detection signal, and transmit the current detection signal to the control unit 140. The current detection signal can represent the state of each power supply branch 120. When the current detection signal represents that the power supply branch 120 is disconnected or overcurrent occurs, the control unit drives the corresponding first switch 121 to turn off.

[0060] The detection circuit 130 includes a voltage detection circuit 150 and a current detection circuit 131 , and the control unit 140 may have a plurality of first input terminals and a plurality of second input terminals.

[0061] Each first input terminal of the control unit 140 is electrically connected to the output terminal of each current detection circuit 131 in a one-to-one correspondence. The current detection circuit 131 can detect the current of each power supply branch 120 to indicate whether the power supply branch 120 is in an overcurrent state.

[0062] Each second input terminal of the control unit 140 is electrically connected to the output terminal of each voltage detection circuit 150 in a one-to-one correspondence. The voltage detection circuit 150 can detect the voltage of each power supply branch 120 to indicate whether the power supply branch 120 is in a disconnected state.

[0063] Reference Figure 4 In some embodiments, the voltage detection circuit 150 includes: a second switch 151, a first resistor R1, and a voltage divider circuit 152. The first end of the second switch 151 is electrically connected to the output end of the power supply main circuit 110, and the driving end of the second switch 151 is electrically connected to the output end of the control unit 140; the first end of the first resistor R1 is electrically connected to the second end of the second switch 151, and the second end of the first resistor R1 is electrically connected to the power supply branch 120; the input end of the voltage divider circuit 152 is electrically connected to the second end of the first resistor R1, and the output end of the voltage divider circuit 152 is electrically connected to the second input end of the control unit 140.

[0064] The second switch 151 can be a MOS (Metal-Oxide-Semiconductor Field-Effect Transistor), an IGBT (Insulate-Gate Bipolar Transistor) relay, etc. The specific type of the second switch 151 is not limited here and can be selected according to the actual application scenario.

[0065] The second switch 151 can be switched between an on mode and an off mode. When the second switch 151 is on, the voltage detection circuit 150 detects the voltage of the corresponding power supply branch 120 .

[0066] The voltage divider circuit 152 and the first resistor R1 jointly divide the voltage. When the power supply branch 120 is disconnected, the load is disconnected from the power supply branch 120. The impedance of the power supply branch 120 is greater than the impedance of the power supply branch 120 when it is working normally. The voltage divided by the voltage divider circuit 152 increases, and the voltage value represented by the voltage detection signal output by the voltage divider circuit 152 increases.

[0067] In some embodiments, the voltage divider circuit 152 may include a third resistor R3 and a fourth resistor R4. A first end of the third resistor R3 is electrically connected to a second end of the first resistor R1, and a second end of the third resistor R3 is electrically connected to a second input end of the control unit 140; a first end of the fourth resistor R4 is electrically connected to a second end of the third resistor R3, and a second end of the fourth resistor R4 is electrically connected to a ground node.

[0068] As an example, the resistance value of the first resistor R1 is R1, the resistance value of the third resistor R3 is R3, and the resistance value of the fourth resistor R4 is R4. When the power supply branch 120 is disconnected, the load is disconnected from the power supply branch 120, and the voltage V at the output end of the voltage divider circuit 152 is Vcc*R4 / (R2+R3+R4), wherein Vcc is the voltage of the main power supply circuit 110. When the power supply branch 120 is not disconnected, the load is connected in parallel with the voltage divider circuit 152, and the total impedance of the power supply branch 120 is less than the total impedance when the power supply branch 120 is disconnected. The voltage at the output end of the voltage divider circuit 152 is less than the voltage V at the output end of the voltage divider circuit 152 when the power supply branch 120 is disconnected. The voltage value represented by the output voltage detection signal of the voltage divider circuit 152 is greater than the voltage divided by the voltage divider circuit 152 when the power supply branch 120 is not disconnected, indicating that the power supply branch 120 is disconnected.

[0069] In some embodiments, a power supply end of the control unit 140 is electrically connected to an output end of the main power supply loop 110 .

[0070] After the power supply main circuit 110 is powered on, the power supply end of the control unit 140 is powered on preferentially from the power supply main circuit 110. The output end of the control unit 140 is electrically connected to the driving end of the second switch 151. After the control unit 140 is powered on, a conduction signal is applied to the driving end of the second switch 151, so that the voltage detection circuit 150 is powered to detect the state of each power supply branch 120, and transmits the voltage detection signal to the second input end of the control unit 140.

[0071] When the power supply circuit is in the initial state, each first switch 121 is in the off state. The output end of the control unit 140 is electrically connected to the driving end of the first switch 121. If the voltage represented by the voltage detection signal is greater than or equal to the voltage divided by the voltage divider circuit 152 when the power supply branch 120 is not disconnected, the power supply branch 120 is disconnected, and the control unit 140 controls the corresponding first switch 121 to remain in the off state. If the voltage represented by the voltage detection signal is less than the voltage divided by the voltage divider circuit 152 when the power supply branch 120 is not disconnected, the power supply branch 120 is not disconnected, and the control unit 140 controls the corresponding first switch 121 to be turned on.

[0072] When the main power supply circuit 110 is powered on, the control unit 140 turns on the first switch 121 of the corresponding power supply branch 120 after determining that the power supply branch 120 is not disconnected, so as to avoid the power supply of other branches being affected by the disconnection of some power supply branches 120 when the power supply circuit is powered on.

[0073] In some embodiments, the current detection circuit 131 includes: a second resistor R2 and a differential operational amplifier circuit 132. The second resistor R2 is disposed in the power supply branch 120; the positive phase input terminal of the differential operational amplifier circuit 132 is electrically connected to an end of the second resistor R2 close to the power supply main circuit 110, the negative phase input terminal of the differential operational amplifier circuit 132 is electrically connected to an end of the second resistor R2 away from the power supply main circuit 110, and the output terminal of the differential operational amplifier circuit 132 is electrically connected to the first input terminal of the control unit 140.

[0074] The second resistor R2 can provide a sampling voltage for the differential operational amplifier circuit 132. The differential operational circuit collects the differential voltage across the second resistor R2, performs an operation, and outputs a detection signal. In this case, the detection signal is a voltage signal. The quotient of the voltage across the second resistor R2 and the resistance value of the second resistor R2 is the current of the power supply branch 120 where the second resistor R2 is located.

[0075] The differential operational amplifier circuit 132 includes a comparator A1, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8. The positive phase input terminal of the comparator A1 is electrically connected to an end of the second resistor R2 close to the power supply main circuit 110, the negative phase input terminal of the comparator A1 is electrically connected to an end of the second resistor R2 away from the power supply main circuit 110, and the output terminal of the comparator A1 is electrically connected to the first input terminal of the control unit 140; the first end of the fifth resistor R5 is electrically connected to the second end of the second resistor R2, and the second end of the fifth resistor R5 is electrically connected to the positive phase input terminal of the comparator A1; the first end of the sixth resistor R6 is electrically connected to the first end of the second resistor R2, and the second end of the sixth resistor R6 is electrically connected to the negative phase input terminal of the comparator A1; the first end of the seventh resistor R7 is electrically connected to the second end of the fifth resistor R5, and the second end of the seventh resistor R7 is electrically connected to the ground node; the first end of the eighth resistor R8 is electrically connected to the second end of the sixth resistor R6, and the second end of the eighth resistor R8 is electrically connected to the output terminal of the comparator A1.

[0076] The fifth resistor R5 has the same resistance as the sixth resistor R6 , and the seventh resistor R7 has the same resistance as the eighth resistor R8 . The differential voltage across the second resistor R2 can be obtained by using the virtual short and virtual open principles.

[0077] In some embodiments, the main power supply circuit 110 includes: a switching circuit 111, a first end of the switching circuit 111 is used to connect to a power supply, a second end of the switching circuit 111 is electrically connected to each power supply branch 120, and a driving end of the switching circuit 111 is used to connect to a power-on signal, and the power-on signal is used to drive the switching circuit 111 to turn on.

[0078] The power-on signal may be a high level signal or a low level signal. The power-on signal may be provided by a device external to the power supply circuit, and the specific source of the power-on signal is not limited here.

[0079] As an example, when the power supply circuit is used in a whole vehicle system, a power-on signal can be generated by the user turning the car key.

[0080] When the power-on signal drives the switch circuit 111 to turn on, the power of the power supply is transmitted to the input end of each power supply branch 120 through the main power supply circuit 110. Adding the switch circuit 111 can make the on and off states of the main power supply circuit 110 controllable.

[0081] In some embodiments, the switch circuit 111 includes: a third switch 112 and a fourth switch 113. The first end of the third switch 112 is used to access the trigger signal, and the driving end of the third switch 112 is connected to the power-on signal, and the power-on signal is used to drive the third switch 112 to turn on; the first end of the fourth switch 113 is used to access the power supply, the second end of the fourth switch 113 is electrically connected to each power supply branch 120, the driving end of the fourth switch 113 is electrically connected to the second end of the third switch 112, and the fourth switch 113 is configured to turn on when receiving the trigger signal.

[0082] The third switch 112 can be a P-type MOS tube, a PNP-type transistor, a relay, etc., and is mainly used to control the fourth switch 113 to switch between the on and off states. The type of the third switch 112 is not limited here and can be selected according to the actual application scenario.

[0083] The fourth switch 113 can be an N-type MOS tube, an NPN-type transistor, a relay, etc. When the fourth switch 113 is turned on, the power of the power supply is transmitted to the input end of each power supply branch 120 through the main power supply circuit 110. When the fourth switch 113 is turned off, the power of the power supply cannot be transmitted to the input end of each power supply branch 120. The type of the fourth switch 113 is not limited here, and can be selected according to the actual application scenario.

[0084] As an example, the third switch 112 is a P-type MOS tube, the fourth switch 113 is an N-type MOS tube, and the gate of the third switch 112 is connected to the power-on signal, and the power-on signal can be a high-level signal. The drain of the third switch 112 is electrically connected to the gate of the fourth switch 113, and the source of the third switch 112 is electrically connected to the ground node, and the low level provided by the ground node is the trigger signal. The source of the fourth switch 113 is connected to the power supply, and the drain of the fourth switch 113 is electrically connected to the power supply branch 120. When the third switch 112 is turned on, the gate of the fourth switch 113 is turned on after receiving the low-level signal provided by the ground node, and the power energy of the power supply can be transmitted to the input end of each power supply branch 120 through the main power supply circuit 110.

[0085] In some embodiments, the switch circuit 111 also includes an OR gate, wherein the first input terminal of the OR gate is connected to a power-on signal, and the second input terminal of the OR gate is used to connect a power-off delay signal when the power-on signal fails. The output terminal of the OR gate is electrically connected to the driving end of the third switch 112, and the power-off delay signal is used to control the third switch 112 to turn on within the delay time.

[0086] A delay relay may be provided in the power supply circuit. When the control unit detects that the power supply is about to be interrupted or the system is about to be shut down, it may apply a power-off delay signal to drive the delay relay to start timing. During the delay time, the control unit controls the third switch 112 to be turned on during the delay time.

[0087] When the power-on signal fails, the power-off delay signal can control the third switch 112 to turn on within the delay time. The load connected to the power supply branch 120 can store data during operation within the delay time after the power-on signal fails, avoiding data loss due to instantaneous power failure of the power supply circuit.

[0088] In some embodiments, the power supply circuit also includes a connector, which includes a power supply port, a drive port, a power-off delay port and a bus port. The power supply port is electrically connected to the first end of the fourth switch 113, the drive port and the power-off delay port are respectively electrically connected to the drive end of the second switch 151, and the bus port is electrically connected to the control unit 140 via the CAN bus.

[0089] The power supply port is used to realize the connection between the power supply main circuit 110 and the power supply, the drive port is used to access the power-on signal, the power-off delay port is used to access the power-off delay signal, and the bus port is electrically connected to the control unit 140 through the CAN bus. The control unit 140 can upload the operation status of the power supply branch 120 to the external monitoring device through the CAN bus.

[0090] In some embodiments, the power supply circuit further includes an electromagnetic compatibility circuit 160 , an input end of the electromagnetic compatibility circuit 160 is used to access a power source, and an output end of the electromagnetic compatibility circuit 160 is electrically connected to a first end of the fourth switch 113 .

[0091] The electromagnetic compatibility circuit 160 can reduce or eliminate interference caused by electromagnetic radiation and conduction, and reduce crosstalk and coupling on the signal transmission path. The input ends of the multiple power supply branches 120 are electrically connected to the output end of the electromagnetic compatibility circuit 160, saving the hardware cost of the circuit.

[0092] An embodiment of the present application provides an all-in-one motor controller, which includes: the aforementioned power supply circuit and multiple sub-boards, and the output end of each power supply branch in the power supply circuit is electrically connected to the power supply end of each load.

[0093] The output end of each power supply branch 120 in the power supply circuit is connected to the power supply end of each sub-board in a one-to-one correspondence, and the power energy of the power supply is used to supply power to each load.

[0094] The specific structure and working principle of the power supply circuit can refer to the above-mentioned embodiment and will not be described in detail here.

[0095] According to the multi-in-one motor controller of the present application, each power supply branch 120 of its power supply circuit is provided with an independent first switch 121, and each power supply branch 120 is electrically connected to the corresponding detection circuit 130. After the power supply circuit is powered on, if the detection circuit 130 detects that a certain power supply branch 120 is faulty, the main control unit controls the first switch 121 corresponding to the power supply branch 120 to be turned off. Each power supply branch 120 is independently controlled by the main control unit to prevent overcurrent in a certain power supply branch 120 from affecting other power supply branches 120.

[0096] An embodiment of the present application provides an integrated device, which includes: the aforementioned power supply circuit and multiple loads RL1-RLn, wherein the output ends of multiple power supply branches 120 in the power supply circuit are electrically connected to the power supply ends of each load.

[0097] The integrated device can be a vehicle, equipment room or other device that integrates multiple functional modules. Each functional module is equivalent to a load. The output end of each power supply branch 120 in the power supply circuit is connected to the power supply end of each load one by one, and the power supply is used to power each load.

[0098] The specific structure and working principle of the power supply circuit can refer to the above-mentioned embodiment and will not be described in detail here.

[0099] According to the integrated device of the present application, each power supply branch 120 of its power supply circuit is provided with an independent first switch 121, and each power supply branch 120 is electrically connected to the corresponding detection circuit 130. After the power supply circuit is powered on, if the detection circuit 130 detects that a certain power supply branch 120 is faulty, the main control unit controls the first switch 121 corresponding to the power supply branch 120 to be turned off. Each power supply branch 120 is independently controlled by the main control unit to prevent overcurrent of a certain power supply branch 120 from affecting other power supply branches 120.

[0100] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A power supply circuit, characterized in that: include: A main power supply circuit, the input end of which is used to access a power source; A plurality of power supply branches, the input end of each power supply branch is electrically connected to the output end of the power supply main circuit, and each power supply branch is provided with a first switch; A plurality of detection circuits, wherein an input end of the detection circuit is electrically connected to the power supply branch and is configured to detect electrical parameters of the power supply branch and output a detection signal; A control unit, the control unit having a plurality of input terminals and a plurality of output terminals, each of the input terminals of the control unit being electrically connected to an output terminal of each of the detection circuits in a one-to-one correspondence, and each of the output terminals of the control unit being electrically connected to a driving terminal of each of the first switches in a one-to-one correspondence; The control unit is configured to control each of the first switches to be turned on or off.

2. The power supply circuit according to claim 1, characterized in that: The electrical parameter includes voltage and / or current, and the detection circuit includes: a voltage detection circuit, wherein an input end of the voltage detection circuit is electrically connected to the power supply branch and is configured to detect the voltage of the power supply branch and output a voltage detection signal; and / or, A current detection circuit, wherein an input end of the current detection circuit is electrically connected to the power supply branch and is configured to detect the current of the power supply branch and output a current detection signal.

3. The power supply circuit according to claim 2, characterized in that: The voltage detection circuit comprises: a second switch, wherein a first end of the second switch is electrically connected to an output end of the main power supply circuit, and a driving end of the second switch is electrically connected to an output end of the control unit; a first resistor, wherein a first end of the first resistor is electrically connected to a second end of the second switch, and a second end of the first resistor is electrically connected to the power supply branch; A voltage divider circuit, wherein an input end of the voltage divider circuit is electrically connected to the second end of the first resistor, and an output end of the voltage divider circuit is electrically connected to the second input end of the control unit.

4. The power supply circuit according to claim 3, characterized in that: The power supply end of the control unit is electrically connected to the output end of the main power supply circuit.

5. The power supply circuit according to any one of claims 2 to 4, characterized in that: The current detection circuit comprises: A second resistor is arranged in the power supply branch; A differential operational amplifier circuit, wherein a positive phase input terminal of the differential operational amplifier circuit is electrically connected to an end of the second resistor close to the main power supply circuit, a negative phase input terminal of the differential operational amplifier circuit is electrically connected to an end of the second resistor away from the main power supply circuit, and an output terminal of the differential operational amplifier circuit is electrically connected to a first input terminal of the control unit.

6. The power supply circuit according to any one of claims 1 to 4, characterized in that: The main power supply circuit comprises: A switch circuit, wherein the first end of the switch circuit is used to access the power supply, the second end of the switch circuit is electrically connected to each of the power supply branches, and the driving end of the switch circuit is used to access a power-on signal, and the power-on signal is used to drive the switch circuit to conduct.

7. The power supply circuit according to claim 6, characterized in that: The switch circuit comprises: a third switch, wherein a first end of the third switch is used to receive a trigger signal, a driving end of the third switch is used to receive the power-on signal, and the power-on signal is used to drive the third switch to turn on; A fourth switch, wherein a first end of the fourth switch is used to connect to the power supply, a second end of the fourth switch is electrically connected to each of the power supply branches, a driving end of the fourth switch is electrically connected to the second end of the third switch, and the fourth switch is configured to be turned on upon receiving the trigger signal.

8. The power supply circuit according to claim 7, characterized in that: The switch circuit further comprises: An OR gate, wherein the first input end of the OR gate is connected to the power-on signal, the second input end of the OR gate is used to connect the power-off delay signal when the power-on signal fails, the output end of the OR gate is electrically connected to the driving end of the third switch, and the power-off delay signal is used to control the third switch to be turned on within the delay time.

9. The power supply circuit according to claim 8, characterized in that: The power supply circuit further includes: A connector, the connector comprising a power supply port, a drive port, a power-off delay port and a bus port, the power supply port being electrically connected to the first end of the fourth switch, the drive port and the power-off delay port being electrically connected to the drive end of the second switch respectively, and the bus port being electrically connected to the control unit via a CAN bus.

10. An all-in-one motor controller, characterized in that: It comprises a power supply circuit according to any one of claims 1 to 9 and a plurality of sub-boards, wherein the output end of each power supply branch in the power supply circuit is electrically connected to the power supply end of each of the sub-boards.

11. An integrated device, characterized in that: The invention comprises a power supply circuit according to any one of claims 1 to 9 and a plurality of loads, wherein the output end of each power supply branch in the power supply circuit is electrically connected to the power supply end of each of the loads.

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