CN220210278U - Electric motorcycle and motor controller thereof - Google Patents
Electric motorcycle and motor controller thereof Download PDFInfo
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- CN220210278U CN220210278U CN202320866485.7U CN202320866485U CN220210278U CN 220210278 U CN220210278 U CN 220210278U CN 202320866485 U CN202320866485 U CN 202320866485U CN 220210278 U CN220210278 U CN 220210278U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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Abstract
The application discloses electric motorcycle and motor controller thereof, motor controller include motor control circuit and cross undervoltage detection circuitry, cross undervoltage detection circuitry in the undervoltage detection circuitry and judge whether the voltage of target node is less than the undervoltage threshold value through first switching tube, when the target node undervoltage, first switching tube output undervoltage signal. The overvoltage detection circuit judges whether the voltage of the target node is higher than an overvoltage threshold value through the second switching tube, and when the target node is overvoltage, the overvoltage detection circuit outputs an overvoltage signal. Based on the design, the overvoltage and undervoltage detection circuit does not need to use a voltage comparator to judge whether the voltage of the target node is overvoltage or undervoltage, so that the structure of the overvoltage and undervoltage detection circuit can be effectively simplified, and the hardware cost of the overvoltage and undervoltage detection circuit is reduced. In addition, by arranging the first switching tube and the second switching tube, the voltage range which can be detected by the overvoltage and undervoltage detection circuit can be enlarged.
Description
Technical Field
The application relates to the technical field of vehicles, in particular to an electric motorcycle and a motor controller thereof.
Background
The motor controller of the electric motorcycle has overvoltage detection and undervoltage detection functions, and in order to realize overvoltage detection and undervoltage detection, the current motor controller generally adopts two comparators to respectively compare and judge the voltage of the same node, and a plurality of nodes in the motor controller need to be subjected to overvoltage and undervoltage detection, and a large number of comparators need to be used, so that the hardware cost of the motor controller is increased. In addition, since the comparator has parameter limitation of common mode voltage, the voltage threshold that can be set can not exceed 3.5V generally, and for the node with voltage exceeding 3.5V in the motor controller, the comparator can not directly detect whether the node is over-voltage, and a voltage dividing circuit and a voltage follower circuit are required to be additionally arranged, so that the hardware cost is further increased.
Disclosure of Invention
In view of this, the present application provides an electric motorcycle and motor controller thereof, which can reduce the hardware cost of overvoltage and undervoltage detection.
The technical scheme of the application is as follows:
in a first aspect, the application provides an electric motorcycle, including automobile body and driving system, driving system sets up on the automobile body, and driving system includes motor controller and motor, and motor controller includes motor control circuit and crosses undervoltage detection circuitry, is equipped with the target node in the motor control circuit, crosses undervoltage detection circuitry and is connected with the target node for detect whether the voltage of target node is excessive pressure or undervoltage, cross undervoltage detection circuitry and include undervoltage detection circuitry and overvoltage detection circuitry. The under-voltage detection circuit comprises a first diode and a first switching tube, one end of the first diode is connected with the target node, the other end of the first diode is connected with the first switching tube, and when the voltage of the target node is lower than an under-voltage threshold value, the first switching tube outputs an under-voltage signal. The overvoltage detection circuit comprises a second diode and a second switching tube, one end of the second diode is connected with the target node, the other end of the second diode is connected with the second switching tube, and when the voltage of the target node is higher than an overvoltage threshold value, the second switching tube outputs an overvoltage signal.
In one possible implementation manner, the motor control circuit comprises more than one target node, the undervoltage detection circuit comprises more than one first diode, one end of each first diode is correspondingly connected with one target node, the other end of each first diode is connected with a first switching tube, and when one of the target nodes is undervoltage, the first switching tube outputs an undervoltage signal; the overvoltage detection circuit comprises more than one second diode, one end of each second diode is correspondingly connected with a target node, the other end of each second diode is connected with a second switching tube, and when one of the target nodes is overvoltage, the second switching tube outputs an overvoltage signal.
In one possible implementation manner, the undervoltage detection circuit further comprises a first resistor and a first capacitor, one ends of the first resistor and the first capacitor are connected with the control end of the first switching tube, and the other ends of the first resistor and the first capacitor are connected with the first end of the first switching tube; the overvoltage detection circuit further comprises a second resistor and a second capacitor, one end of the second resistor and one end of the second capacitor are connected with the first end of the second switching tube, and the other end of the second resistor and the other end of the second capacitor are connected with the control end of the second switching tube.
In one possible implementation, the undervoltage detection circuit further includes a first current limiting resistor connected between the control terminal of the first switching tube and the other terminal of the first diode unit.
In one possible embodiment, the overvoltage detection circuit further comprises a second current limiting resistor, which is connected between the control terminal of the second switching tube and the receiving node of the overvoltage threshold value.
In one possible implementation manner, the overvoltage/undervoltage detection circuit further comprises a fault indication circuit, wherein an input end of the fault indication circuit is connected with the second end of the first switching tube and the second end of the second switching tube, and an output end of the fault indication circuit is used for outputting a fault indication signal according to the undervoltage signal or the overvoltage signal.
In one possible implementation manner, the fault indication circuit comprises a third switching tube and a pull-up resistor, a control end of the third switching tube is connected with a second end of the first switching tube and a second end of the second switching tube, a first end of the third switching tube is connected with a power supply end through the pull-up resistor, and a second end of the third switching tube is grounded; the third switching tube is turned on or turned off according to the undervoltage signal or the overvoltage signal so as to output a fault indication signal.
In one possible embodiment, the motor control circuit includes a control unit connected to an output of the fault indication circuit to receive the fault indication signal, and the control unit controls the motor control circuit to stop operating when the fault indication signal indicates that the target node is over-voltage or under-voltage.
In a second aspect, the application further provides a motor controller, the motor controller comprises a motor control circuit and an overvoltage/undervoltage detection circuit, at least one target node is arranged in the motor control circuit, and the overvoltage/undervoltage detection circuit is connected with the target node and used for detecting whether the voltage of the target node is overvoltage or undervoltage. The overvoltage and undervoltage detection circuit comprises an undervoltage detection circuit and an overvoltage detection circuit. The under-voltage detection circuit comprises a first diode and a first switching tube, one end of the first diode is connected with the target node, the other end of the first diode is connected with the first switching tube, and when the voltage of the target node is lower than an under-voltage threshold value, the first switching tube outputs an under-voltage signal. The overvoltage detection circuit comprises a second diode and a second switching tube, one end of the second diode is connected with the target node, the other end of the second diode is connected with the second switching tube, and when the voltage of the target node is higher than an overvoltage threshold value, the second switching tube outputs an overvoltage signal.
In one possible implementation manner, the over-voltage and under-voltage detection circuit further comprises a fault indication circuit, the fault indication circuit comprises a third switching tube and a pull-up resistor, a control end of the third switching tube is connected with a second end of the first switching tube and a second end of the second switching tube, a first end of the third switching tube is connected with a power supply end through the pull-up resistor, and a second end of the third switching tube is grounded; the third switching tube is turned on or turned off according to the undervoltage signal or the overvoltage signal so as to output a fault indication signal; the motor control circuit comprises a control unit, wherein the control unit is connected with the output end of the fault indication circuit to receive a fault indication signal; when the fault indication signal represents overvoltage or undervoltage of the target node, the control unit controls the motor control circuit to stop working.
The beneficial effects that this application provided technical scheme brought include at least:
the undervoltage detection circuit in the undervoltage detection circuit judges whether the voltage of the target node is lower than an undervoltage threshold value or not through the first diode and the first switching tube, and when the target node is undervoltage, the first switching tube outputs an undervoltage signal. The overvoltage detection circuit judges whether the voltage of the target node is higher than an overvoltage threshold value through the second diode and the second switching tube, and when the target node is overvoltage, the overvoltage detection circuit outputs an overvoltage signal. Based on the design, the overvoltage and undervoltage detection circuit does not need to use a voltage comparator to judge whether the voltage of the target node is overvoltage or undervoltage, so that the structure of the overvoltage and undervoltage detection circuit can be effectively simplified, the hardware cost of the overvoltage and undervoltage detection circuit is reduced, and the voltage range which can be detected by the overvoltage and undervoltage detection circuit can be enlarged.
Drawings
Fig. 1 is a schematic view of an electric motorcycle provided in an embodiment of the present application;
FIG. 2 is a block schematic diagram of a powertrain provided by an embodiment of the present application;
FIG. 3 is a schematic block diagram of a motor controller according to an embodiment of the present disclosure;
fig. 4 is a schematic circuit diagram of an over-voltage and under-voltage detection circuit according to an embodiment of the present application;
fig. 5 is a schematic diagram of another circuit principle of the overvoltage/undervoltage detection circuit according to the embodiment of the present application.
Description of the main reference signs
100-electric motor car; 11-a vehicle body; 12-a power system; 121-a motor controller; m1-a motor; 1210-a motor control circuit; v (V) 1 、V 2 、V 3 -a target node; 1210 a-a control unit; 1211-an over-voltage and under-voltage detection circuit; 1211 a-undervoltage detection circuitry; d (D) 1 -a first diode; q (Q) 1 -a first switching tube; r is R 1 -a first resistance; c (C) 1 -a first capacitance; r is R 2 -a first current limiting resistor; 1211 b-an overvoltage detection circuit; d (D) 2 -a second diode; q (Q) 2 A second switching tube; v (V) 4 -connecting nodes; r is R 3 -a second resistance; c (C) 2 -a second capacitance; r is R 4 -a second current limiting resistor; r is R 5 -a third current limiting resistor; r is R 6 -a fourth current limiting resistor; 1211 c-fault indication circuitry; q (Q) 3 -a third switching tube; r is R 7 -a pull-up resistor; r is R 8 -a third resistance; c (C) 3 -a third capacitance.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or connected in a wireless way or indirectly connected through an intermediate medium, and can be communicated inside the two components. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1 and 2, fig. 1 schematically illustrates an electric motorcycle 100 provided in an embodiment of the present application, where the electric motorcycle 100 includes a vehicle body 11 and a power system 12, the power system 12 is disposed on the vehicle body 11, the power system 12 includes a motor controller 121 and a motor M1, and the motor controller 121 is configured to control the motor M1 to rotate.
Referring to fig. 3, fig. 3 illustrates a motor controller 121 provided in an embodiment of the present application, where the motor controller 121 includes a motor control circuit 1210 and an overvoltage/undervoltage detection circuit 1211, a target node is disposed in the motor control circuit 1210, the overvoltage/undervoltage detection circuit 1211 is used for detecting whether the voltage of the target node is overvoltage or undervoltage, and the overvoltage/undervoltage detection circuit 1211 includes an undervoltage detection circuit 1211a and an overvoltage detection circuit 1211b.
It should be understood that the motor control circuit 1210 refers to a circuit of the motor controller 121, which is mainly used for driving the connected motor M1 to rotate, and may be any circuit capable of implementing a corresponding function, which is not limited in this application. The target node refers to a node in the motor control circuit 1210 that needs to perform over-voltage and under-voltage detection, and the target node may include more than one node (shown as V in fig. 5 1 、V 2 、V 3 )。
As shown in fig. 4 and 5, a specific circuit schematic diagram of the undervoltage detection circuit 1211 according to the embodiment of the present application is shown, where the undervoltage detection circuit 1211a includes a first diode D 1 And a first switching tube Q 1 First diode D 1 Is connected to the target node, a first diode D 1 The other end of (B) is connected with a first switch tube Q 1 And (5) connection. When the voltage of the target node is lower than the undervoltage threshold value, the first switching tube Q 1 And outputting an undervoltage signal.
The overvoltage detection circuit 1211b includes a second diode D 2 And a second switchClosing tube Q 2 Second diode D 2 Is connected to the target node, a second diode D 2 And the other end of the second switch tube Q 2 And (5) connection. When the voltage of the target node is higher than the overvoltage threshold value, the second switching tube Q 2 And outputting an overvoltage signal.
It will be appreciated that the first switching tube Q 1 And when the voltage of the target node is lower than the undervoltage threshold, the voltage control circuit is turned on or turned off, so that a level signal which is different from that when the voltage of the target node is higher than the undervoltage threshold is output as an undervoltage signal. Second switch tube Q 2 And when the voltage of the target node is higher than the overvoltage threshold value, the voltage control circuit is turned on or off, so that a level signal which is different from that when the voltage of the target node is lower than the overvoltage threshold value is output as an overvoltage signal.
In the motor controller 121 of the present application, the undervoltage detection circuit 1211a of the undervoltage detection circuit 1211 passes through the first diode D 1 And a first switching tube Q 1 Judging whether the voltage of the target node is lower than an undervoltage threshold value, and when the target node is undervoltage, a first switching tube Q 1 And outputting an undervoltage signal. The overvoltage detection circuit 1211b passes through the second diode D 2 And a second switching tube Q 2 Whether the voltage of the target node is higher than the overvoltage threshold value is determined, and when the target node is overvoltage, the overvoltage detection circuit 1211b outputs an overvoltage signal. Based on such a design, the over-voltage and under-voltage detection circuit 1211 can effectively simplify the structure of the over-voltage and under-voltage detection circuit 1211 without using a voltage comparator to determine whether the voltage of the target node is over-voltage or under-voltage. Since the cost of the diode and the switching tube is far lower than that of the voltage comparator, the hardware cost of the over-voltage and under-voltage detection circuit 1211 can also be reduced. And through the first switching tube Q 1 Judging whether the voltage of the target node is lower than an undervoltage threshold and a second switching tube Q 2 Whether the voltage of the target node is lower than the overvoltage threshold value or not is judged, and the undervoltage threshold value and the overvoltage threshold value are not limited to be within 3.5V, so that the voltage range which can be detected by the overvoltage/undervoltage detection circuit 1211 can be enlarged.
In some embodiments, as shown in FIGS. 4 and 5, a first switching tube Q 1 For receiving an under-voltage threshold (VDD as shown in fig. 4 and 5), a first switching tube Q 1 The control end of (1) is connected with the first diode D 1 When the voltage of the target node is lower than the undervoltage threshold value, the first switching tube Q 1 On or off to make the first switch tube Q 1 Generates an under-voltage signal at the second terminal of (a).
Second switch tube Q 2 The control terminal of (a) receives an overvoltage threshold (VDC as shown in figures 4 and 5), a second switching tube Q 2 Is connected with the second diode D 2 When the voltage of the target node is higher than the overvoltage threshold value, the second switching tube Q 2 On or off to make the second switch tube Q 2 Generates an overpressure signal at the second end of the circuit.
That is, in the first switching tube Q 1 When being turned on or off, the first switch tube Q 1 Generates a corresponding level signal at the second end of the circuit; in the second switching tube Q 2 When being turned on or off, the second switch tube Q 2 A corresponding level signal is also generated at the second end of the first switch tube Q 1 And a second switching tube Q 2 The level signal at the second terminal of (a) can be used to determine whether the voltage at the target node is over-voltage or under-voltage. For example, when the first switching tube Q 1 The second end generates the first level signal; first switch tube Q 1 When the switch is turned off, the second end generates a second level signal, and the first switch tube Q 1 The on-off is associated with whether the target node is under-voltage. Thus can be according to the first switching tube Q 1 And the level signal of the second end of the target node is used for judging whether the target node is under voltage or not. When the second switch tube Q 2 When the switch is turned on, the second end of the switch generates a third level signal; second switch tube Q 2 When turned off, the second terminal generates a fourth level signal, so that the second switching tube Q can be used for 2 And the level signal at the second end of the (c) is used for judging whether the target node is overvoltage or not.
In the embodiment of the application, the first switch tube Q 1 And a second switching tube Q 2 May be provided as a transistor or triode.
Specifically, referring to fig. 4 and 5, when the first switching transistor Q 1 And a second switching tube Q 2 When the first diode D is a PNP triode or a PMOS tube 1 Is connected with the target node, the firstA diode D 1 Is connected with the first switch tube Q 1 A control terminal of a second diode D 2 An anode of the second diode D is connected to the target node 2 Is connected with a second switch tube Q 2 Is provided.
At this time, if the voltage of the target node is smaller than the undervoltage threshold, the first diode D 1 In an on state, a first switch tube Q 1 Is pulled low, the first switch tube Q 1 The voltage of the control terminal of (a) is smaller than that of the first terminal of (b), the first switch tube Q 1 On, first switch tube Q 1 A high signal is output from the second terminal of (a).
If the voltage of the target node is greater than the undervoltage threshold and less than the overvoltage threshold, a first diode D 1 And a second diode D 2 All are in the cut-off state, the first switch tube Q 1 The voltage of the control terminal of (a) is equal to the voltage of the first terminal of (b), the first switch tube Q 1 Turn off, the second switch tube Q 2 The voltage of the control terminal of (a) is greater than or equal to the voltage of the first terminal of (b), the second switch tube Q 2 Turn off, i.e. the first switching tube Q 1 And a second switching tube Q 2 The second end of the node is not provided with a level signal, which indicates that the target node is not under-voltage or over-voltage and is in a normal state. Of course, the first switching tube Q can also be arranged 1 And a second switching tube Q 2 A second end of the first switch tube Q is connected with a pull-down resistor 1 And a second switching tube Q 2 When turned off, the second ends of the two signals are low level signals.
If the voltage of the target node is greater than the overvoltage threshold value, the second diode D 2 In an on state, a second switch tube Q 2 The voltage of the control terminal of (a) is smaller than that of the first terminal of (b), the second switch tube Q 2 On, thus the second switching tube Q 2 A high signal is generated at the second terminal of (a) to indicate that the target node is over-voltage.
Thus, when the first switching tube Q 1 And a second switching tube Q 2 When the transistor is a PNP triode or a PMOS tube, the first switch tube Q 1 Conduction description target node undervoltage, second switch tube Q 2 Conduction description target nodeOvervoltage, a first switch tube Q 1 And a second switching tube Q 2 The second ends of the two are caused to generate level change, so that the first switch tube Q can be used for 1 And a second switching tube Q 2 The level change at the second end of (2) determines whether the target node is in an under-voltage and an over-voltage condition.
In the embodiment of the application, for the first switching tube Q 1 The type of components specifically employed is not limited, e.g. first switch Q 1 And a second switching tube Q 2 Can also be arranged as NPN triode or NMOS tube, of course, the first switch tube Q 1 And a second switching tube Q 2 Or different types of switching tubes, and the first switching tube Q can be arranged according to actual requirements 1 And a first diode D 1 Second switching tube Q 2 And a second diode D 2 The type and connection between them, e.g. also a first diode D 1 Is a first diode D of 1 Is connected with the target node, the first diode D 1 Is connected with the first switch tube Q 1 A control terminal of a second diode D 2 A cathode of (a) is connected with the target node, a second diode D 2 Is connected with a second switch tube Q 2 Is provided.
Due to the fact that the embodiment of the application passes through the first switch tube Q 1 Is directly connected with the first end of the second switch tube Q 2 The first end of the voltage detection circuit directly receives the overvoltage threshold value, the upper limit of the overvoltage threshold value and the upper limit of the overvoltage threshold value can be increased to about 20V, and the voltage range which can be detected by the voltage detection circuit can be enlarged.
In some specific examples, as shown in fig. 5, when the motor control circuit 1210 includes more than one target node, the brown-out detection circuit 1211a includes more than one first diode D 1 Each first diode D 1 One end of each first diode D is correspondingly connected with a target node 1 The other end of the target node is connected with a first switching tube Q, when one of the target nodes is undervoltage, the first switching tube Q 1 And outputting an undervoltage signal. The overvoltage detection circuit 1211b includes one or more second diodes D 2 Each firstTwo diodes D 2 One end of each second diode D is correspondingly connected with a target node 2 The other end of (B) is connected with a second switch tube Q 2 When one of the target nodes is over-voltage, the second switching tube Q 2 And outputting an overvoltage signal. First diode D 1 And a second diode D 2 The number of the first switching tube Q can be set according to the number of the nodes needing to perform overvoltage and undervoltage detection in the motor control circuit 1210, when a plurality of target nodes are provided, if one of the target nodes is overvoltage or undervoltage, the first switching tube Q can be caused 1 Or a second switching tube Q 2 And outputting a corresponding signal. Based on this, in this example, the over-voltage and under-voltage detection circuit 1211 can not only realize the over-voltage and under-voltage detection of the target node, but also simultaneously perform the over-voltage and under-voltage detection on a plurality of nodes, thereby further reducing the hardware cost of the over-voltage and under-voltage detection circuit 1211 in the motor controller 121.
With continued reference to fig. 4 and 5, the brown-out detection circuit 1211a further includes a first resistor R 1 And a first capacitor C 1 First resistor R 1 And a first capacitor C 1 One end of (a) is connected with a first switch tube Q 1 A first resistor R 1 And a first capacitor C 1 The other end of (a) is connected with a first switch tube Q 1 Is provided. Through a first resistor R 1 And a first capacitor C 1 Is arranged at the first switch tube Q 1 Between the control end and the first end of the first switch tube Q 1 Is used for preventing the first switch tube Q from being interfered 1 When the target node is in a normal state, the first switching tube Q is caused to malfunction 1 And the second end of the target node generates level change, so that the judgment of the undervoltage state of the target node is wrong.
Likewise, the overvoltage detection circuit 1211b may also include a second resistor R 3 And a second capacitor C 2 A second resistor R 3 And a second capacitor C 2 One end of (a) is connected with a second switch tube Q 2 A first end of a second resistor R 3 And a second capacitor C 2 The other end of (B) is connected with a second switch tube Q 2 The control end of the second switch tube Q can be increased 2 Is used for preventing the second switch from being interferedTube Q 2 When the target node is in a normal state, the misoperation leads to a second switching tube Q 2 And a second terminal of the target node generates a level change, and the judgment of the overvoltage state of the target node is wrong.
In some specific examples, the brown-out detection circuit 1211a may further include a first current limiting resistor R 2 A first current limiting resistor R 2 Is connected to the first switch tube Q 1 And a first diode D 1 Between to limit the first switch tube Q 1 Thereby preventing the first switching tube Q from 1 Damage.
The overvoltage detection circuit 1211b may further include a second current limiting resistor R 4 A second current limiting resistor R 4 Is connected to the second switch tube Q 2 Between the control terminal of (C) and the receiving node of the overvoltage threshold value to limit the second switching tube Q 2 Thereby preventing the second switching tube Q from 2 Damage.
It will be appreciated that, as shown in FIG. 4, to further prevent the first switching tube Q 1 And a second switching tube Q 2 The current flowing during conduction is overlarge, and a third current limiting resistor R can be respectively arranged 5 And a fourth current limiting resistor R 6 Third current limiting resistor R 5 Is connected to the first switch tube Q 1 A fourth current limiting resistor R 6 One end of (a) is connected with a second switch tube Q 2 Is provided.
With continued reference to fig. 4 and 5, in some specific examples, to better know whether the motor control circuit 1210 is under-voltage or over-voltage, the over-voltage/under-voltage detection circuit 1211 may further include a fault indication circuit 1211c, where an input terminal of the fault indication circuit 1211c and the first switching tube Q 1 And a second switching tube Q 2 The output end of the fault indication circuit 1211c is configured to output a fault indication signal according to the undervoltage signal or the overvoltage signal, where the fault indication signal is used to characterize whether the target node is overvoltage or undervoltage, so as to determine whether the target node is overvoltage or undervoltage according to the fault indication signal.
Wherein, the first switch tube Q 1 And a second switchTube Q 2 Can be connected, the connection node V of the second ends of the two can be connected 4 Is connected to the input of the fault indication circuit 1211c, so that the fault indication circuit does not need to provide two paths to connect the first switching tube Q 1 And a second switching tube Q 2 Is provided. In this case, the undervoltage signal and the overvoltage signal need to be the same signal in level.
Specifically, the fault indication circuit 1211c includes a third switching tube Q 3 And pull-up resistor R 7 Third switch tube Q 3 Control terminal and connection node V of (c) 4 Is connected with a third switch tube Q 3 Through a pull-up resistor R 7 A third switching tube Q connected with the power supply terminal (VCC shown in figures 4 and 5) 3 Is grounded, a third switch tube Q 3 Based on undervoltage or overvoltage signals (i.e. connection node V 4 Level signal of (2) is turned on or off to thereby turn on the third switching transistor Q 3 The first end of the third switch tube Q generates level change and outputs fault indication signal 3 Is provided for the voltage signal at the first terminal of the battery.
Taking fig. 5 as an example, when any target node is under-voltage, a first diode D is connected with the target node 1 Conducting to make the first switch tube Q 1 On, first switch tube Q 1 And a second switching tube Q 2 Connection node V of the second end of (a) 4 Output high level to third switch tube Q 3 A control end of a third switch tube Q 3 Turn on to thereby turn on the third switching tube Q 3 Is pulled low. A second diode D connected to any target node when the target node is over-voltage 2 Conducting to make the second switch tube Q 2 On, first switch tube Q 1 And a second switching tube Q 2 Connection node V of the second end of (a) 4 Output high level to third switch tube Q 3 A control end of a third switch tube Q 3 Turn on to thereby turn on the third switching tube Q 3 Is pulled low. When all the target nodes are in a normal state, a first switch tube Q 1 And a second switching tube Q 2 All turn off, connect node V 4 No level output to the third switch tube Q 3 A control end of a third switch tube Q 3 Turn-off, third switch tube Q 3 Is pulled up by a resistor R 7 Pull high to high. That is, when the fault indication signal is a low level signal, the overvoltage or undervoltage of the target node is represented, and when the fault indication signal is a high level signal, the target node is represented as normal.
In order to perform over-voltage and under-voltage protection on the motor controller 121, the motor control circuit 1210 may include a control unit 1210a, where the control unit 1210a is connected to an output terminal of the fault indication circuit 1211c to receive the fault indication signal. When the fault indication signal indicates that the target node is in an overvoltage or undervoltage state, the control unit 1210a controls the motor control circuit 1210 to stop working, so that the motor controller 121 stops working, and when the node in the motor control circuit 1210 is in an overvoltage or undervoltage state, the motor controller 121 continues to work and is damaged, and overvoltage and undervoltage protection can be performed on the motor controller 121.
Specifically, the control unit 1210a may be connected to the third switching tube Q 3 When the target node is in a normal state, the fault indication signal is a high level signal, and the control unit 1210a controls the motor control circuit 1210 to operate normally, and the motor controller 121 operates normally. And when the target node is under-voltage or over-voltage, the fault indication signal is a low level signal, and the control unit 1210a controls the motor control circuit 1210 to stop operating according to the low level signal, so that the motor controller 121 stops operating.
Further, the fault indication circuit 1211c further includes a third resistor R 8 And a third capacitor C 3 Third resistor R 8 And a third capacitor C 3 One end of (a) is connected with a third switch tube Q 3 A control terminal of a third resistor R 8 And a third capacitor C 3 The other end of (B) is connected with a third switch tube Q 3 Can increase the third switching tube Q 3 Is used for preventing the third switching tube Q 3 Malfunction. In addition, by providing a third resistor R 8 Is connected to a third switch tube Q 3 And a third switching tube Q 3 Can also be a connection joint between the second ends of (a)Point V 4 Providing a pull-down effect. When the first switch tube Q 1 And a second switching tube Q 2 When all are turned off, the third resistor R 8 The connection node V can be 4 Pull down to low level to thereby make the third switch tube Q 3 The control terminal of (2) is also pulled low to prevent the third switching tube Q from 3 Conducting.
It will be appreciated that each resistor and each capacitor mentioned in the embodiments of the present application may include more than one resistor and capacitor, respectively.
By adopting the motor controller 121 in the foregoing embodiment, the electric motorcycle 100 according to the embodiment of the present application can be manufactured in a reduced cost because the over-voltage and under-voltage detection circuit 1211 in the motor controller 121 can simplify the circuit structure and reduce the circuit cost.
The above embodiments are described in terms of preferred embodiments of the present application, and are not intended to limit the scope of the present application, but various modifications and improvements made by those skilled in the art to the technical solutions of the present application should fall within the protection scope defined by the claims of the present application without departing from the design spirit of the present application.
Claims (10)
1. The utility model provides an electric motorcycle car, includes automobile body and driving system, driving system sets up on the automobile body, driving system includes motor controller and motor, motor controller includes motor control circuit and crosses undervoltage detection circuitry, be equipped with the target node in the motor control circuit, cross undervoltage detection circuitry with the target node is connected for detect whether the voltage of target node is excessive pressure or undervoltage, its characterized in that, cross undervoltage detection circuitry and include:
the undervoltage detection circuit comprises a first diode and a first switching tube, wherein one end of the first diode is connected with the target node, the other end of the first diode is connected with the first switching tube, and when the voltage of the target node is lower than an undervoltage threshold value, the first switching tube outputs an undervoltage signal;
and the overvoltage detection circuit comprises a second diode and a second switching tube, one end of the second diode is connected with the target node, the other end of the second diode is connected with the second switching tube, and when the voltage of the target node is higher than an overvoltage threshold value, the second switching tube outputs an overvoltage signal.
2. The electric motorcycle of claim 1, wherein the motor control circuit includes more than one of the target nodes, the under-voltage detection circuit includes more than one of the first diodes, one end of each of the first diodes is correspondingly connected with one of the target nodes, the other end of each of the first diodes is connected with the first switching tube, and when one of the target nodes is under-voltage, the first switching tube outputs the under-voltage signal; the overvoltage detection circuit comprises more than one second diode, one end of each second diode is correspondingly connected with one target node, the other end of each second diode is connected with the second switching tube, and when one of the target nodes is overvoltage, the second switching tube outputs the overvoltage signal.
3. The electric motorcycle of claim 2, wherein the under-voltage detection circuit further comprises a first resistor and a first capacitor, one ends of the first resistor and the first capacitor are connected with the control end of the first switching tube, and the other ends of the first resistor and the first capacitor are connected with the first end of the first switching tube;
the overvoltage detection circuit further comprises a second resistor and a second capacitor, one end of the second resistor and one end of the second capacitor are connected with the first end of the second switching tube, and the other end of the second resistor and the other end of the second capacitor are connected with the control end of the second switching tube.
4. The electric motorcycle of claim 2, wherein the under-voltage detection circuit further includes a first current limiting resistor connected between the control terminal of the first switching tube and the first diode.
5. The electric motorcycle of claim 2, wherein the overvoltage detection circuit further comprises a second current limiting resistor connected between a control terminal of the second switching tube and a receiving node of the overvoltage threshold value.
6. The electric motorcycle of claim 2, wherein the over-voltage and under-voltage detection circuit further comprises a fault indication circuit, an input end of the fault indication circuit is connected with the second end of the first switching tube and the second end of the second switching tube, and an output end of the fault indication circuit is used for outputting a fault indication signal according to the under-voltage signal or the over-voltage signal.
7. The electric motorcycle of claim 6, wherein the fault indication circuit comprises a third switching tube and a pull-up resistor, a control end of the third switching tube is connected with a second end of the first switching tube and a second end of the second switching tube, a first end of the third switching tube is connected with a power supply end through the pull-up resistor, and a second end of the third switching tube is grounded; and the third switching tube is switched on or off according to the undervoltage signal or the overvoltage signal so as to output the fault indication signal.
8. The electric motorcycle of claim 7, wherein the motor control circuit includes a control unit connected to an output of the fault indication circuit to receive the fault indication signal; and when the fault indication signal represents overvoltage or undervoltage of the target node, the control unit controls the motor control circuit to stop working.
9. A motor controller, the motor controller includes motor control circuit and crosses undervoltage detection circuit, be equipped with at least one target node in the motor control circuit, cross undervoltage detection circuit with target node is connected for detect whether the voltage of target node is excessive pressure or undervoltage, its characterized in that, cross undervoltage detection circuit and include:
the undervoltage detection circuit comprises a first diode and a first switching tube, wherein one end of the first diode is connected with the target node, the other end of the first diode is connected with the first switching tube, and when the voltage of the target node is lower than an undervoltage threshold value, the first switching tube outputs an undervoltage signal;
and the overvoltage detection circuit comprises a second diode and a second switching tube, one end of the second diode is connected with the target node, the other end of the second diode is connected with the second switching tube, and when the voltage of the target node is higher than an overvoltage threshold value, the second switching tube outputs an overvoltage signal.
10. The motor controller of claim 9 wherein the over-voltage and under-voltage detection circuit further comprises a fault indication circuit, the fault indication circuit comprises a third switching tube and a pull-up resistor, a control end of the third switching tube is connected with a second end of the first switching tube and a second end of the second switching tube, a first end of the third switching tube is connected with a power supply end through the pull-up resistor, and a second end of the third switching tube is grounded; the third switching tube is turned on or turned off according to the undervoltage signal or the overvoltage signal so as to output the fault indication signal;
the motor control circuit comprises a control unit, wherein the control unit is connected with the output end of the fault indication circuit to receive the fault indication signal; and when the fault indication signal represents overvoltage or undervoltage of the target node, the control unit controls the motor control circuit to stop working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320866485.7U CN220210278U (en) | 2023-04-10 | 2023-04-10 | Electric motorcycle and motor controller thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320866485.7U CN220210278U (en) | 2023-04-10 | 2023-04-10 | Electric motorcycle and motor controller thereof |
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| Publication Number | Publication Date |
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| CN220210278U true CN220210278U (en) | 2023-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320866485.7U Active CN220210278U (en) | 2023-04-10 | 2023-04-10 | Electric motorcycle and motor controller thereof |
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| Country | Link |
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| CN (1) | CN220210278U (en) |
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