CN216929871U - Control device and electric automobile - Google Patents

Abstract

The application relates to an electric automobile of a control device, wherein the control device comprises a driving module, a filtering module, a first magnetic ring and a second magnetic ring. The input end of the filtering module is used for being connected with a bus of a power supply, the output end of the filtering module is connected with the input end of the driving module, the bus is sleeved with the first magnetic ring, and the second magnetic ring is connected with the driving module. The first magnetic ring is used for inhibiting high-frequency interference in the first signal when the power supply inputs the first signal to the filtering module; the driving module is used for driving a motor connected with the control device; the filtering module is used for filtering the first signal and filtering interference in the operation process of the driving module; the second magnetic ring is used for inhibiting high-frequency interference generated in the running process of the motor. The control device can realize the treatment of the interference in the signals transmitted from the power supply bus and the interference generated inside the control device.

Description

Control device and electric automobile

Technical Field

The application relates to the technical field of control, in particular to a control device and an electric automobile.

Background

With the rapid development of social economy, new energy automobiles are more and more widely used. The new energy automobile comprises a battery, a control device and a motor, wherein the control device converts direct current provided by the battery into alternating current to supply power to the motor, so that the motor rotates, and the new energy automobile works. The control device can be interfered by the input of the power bus in the working process, and the electromagnetic interference generated by the control device in the working process can influence the working of the control device, so that the working of the new energy automobile can be influenced.

The conventional technology lacks a scheme for dealing with the interference suffered by the control device.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a control device and an electric vehicle in order to solve the above-described problems.

In one aspect, an embodiment of the present application provides a control device, including a driving module, a filtering module, a first magnetic ring, and a second magnetic ring; the input end of the filtering module is used for being connected with a bus of a power supply, the output end of the filtering module is connected with the input end of the driving module, the first magnetic ring is sleeved on the bus, and the second magnetic ring is connected with the driving module;

the first magnetic ring is used for inhibiting the high-frequency interference of a first signal when the power supply inputs the first signal to the filtering module;

the driving module is used for driving a motor connected with the control device;

the filtering module is used for filtering the first signal and filtering interference generated in the operation process of the driving module;

and the second magnetic ring is used for inhibiting high-frequency interference generated in the running process of the motor.

In one embodiment, the filtering module comprises:

the input end of the first filter circuit is connected with the bus and used for filtering low-frequency interference;

the input end of the second filter circuit is connected with the output end of the first filter circuit and is used for filtering the intermediate frequency interference;

and the input end of the third filter circuit is connected with the output end of the second filter circuit, the output end of the third filter circuit is connected with the driving module, and the third filter circuit is used for filtering high-frequency interference generated in the operation process of the driving module.

In one embodiment, the first filter circuit includes:

at least two capacitors C1 connected in parallel between the positive and negative poles of the bus;

a first end of the capacitor C2 is connected with a negative electrode of the bus, and a second end of the capacitor C2 is grounded;

and a first end of the capacitor C3 and a first end of the capacitor C3 are connected with the positive electrode of the bus, and a second end of the capacitor C3 is grounded.

In one embodiment, the second filter circuit includes:

the input end of the first filtering unit is connected with the output end of the first filtering circuit;

and the third magnetic ring is arranged between the output end of the first filtering unit and the input end of the third filtering circuit.

In one embodiment, the first filtering unit includes:

a capacitor C4 connected with the output end of the first filter circuit;

a capacitor C5, wherein a first end of the capacitor C5 is connected with a first end of the capacitor C4, and a second end of the capacitor C5 is grounded;

the first end of the capacitor C6 and the first end of the capacitor C6 are connected with the second end of the capacitor C4, and the second end of the capacitor C6 is grounded.

In one embodiment, the third filter circuit includes:

the input end of the second filtering unit is connected with the output end of the second filtering circuit;

the capacitor C7 is connected with the input end of the third filter circuit;

and the fourth magnetic ring is arranged between the output end of the second filtering unit and the capacitor C7.

In one embodiment, the second filtering unit includes:

a first end of the capacitor C8, a first end of the capacitor C8 is connected with an output end of the second filter circuit, and a second end of the capacitor C8 is grounded;

and a first end of the capacitor C9 and a first end of the capacitor C9 are connected with the output end of the second filter circuit, and a second end of the capacitor C9 is grounded.

In one embodiment, the method further comprises the following steps:

and the discharge circuit is connected between the third filter circuit and the driving module and used for releasing the voltage in the third filter circuit.

In one embodiment thereof, the discharge circuit includes:

and the first resistor is connected with the output end of the third filter circuit and used for voltage division.

The first end of the second resistor is connected with the first end of the first resistor and used for voltage division;

and a first end of the switch is connected with the second end of the second resistor, and a second end of the switch is connected with the second end of the first resistor.

In another aspect, an embodiment of the present application provides an electric vehicle, including a power supply, a motor, and the control device as provided in the above embodiment; the control device is arranged between the power supply and the motor.

The embodiment of the application provides a controlling means and electric automobile includes drive module, filtering module, first magnetic ring and second magnetic ring. The input end of the filtering module is used for being connected with a bus of a power supply, the output end of the filtering module is connected with the input end of the driving module, the bus is sleeved with the first magnetic ring, and the second magnetic ring is connected with the driving module. The control device provided by the embodiment of the application can suppress high-frequency interference in a first signal output to the control device by a power supply through the first magnetic ring; the filtering module can filter other interference except the high-frequency interference in the first signal, and can also filter the high-frequency interference generated by the driving module; the high-frequency interference of the motor coupled to the control device can be inhibited through the second magnetic ring, and the interference on the control device and the interference generated by the control device can be processed, so that the anti-interference capability (electromagnetic compatibility) of the control device can be improved, and further, the electric automobile can be prevented from being stopped or anchored and other faults caused by the electromagnetic compatibility problem of the control device in the driving process.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the description of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an electric vehicle according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a control device according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a control device according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a filtering module according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a filtering module according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a control device according to an embodiment of the present application.

Description of reference numerals:

10. an electric vehicle; 11. a power source; 12. a motor; 20. a control device; 100. a driving module; 200. a filtering module; 210. a first filter circuit; 220. a second filter circuit; 221. a first filtering unit; 222. a third magnetic ring; 230. a third filter circuit; 231. a second filtering unit; 232. a fourth magnetic ring; 300. a first magnetic ring; 400. a second magnetic ring; 500. a control module; 600. a shielding module; 700. a discharge circuit; 710. a first resistor; 720. a second resistor; 730. and (4) switching.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

With the rapid development of social economy, new energy automobiles are more and more widely used, and electric automobiles are one of the new energy automobiles. The structure of the electric vehicle is as shown in fig. 1, the electric vehicle 10 includes a power supply 11, a control device 20 and a motor 12, the control device 20 converts direct current provided by the power supply 11 into alternating current to supply power to the motor 12, and controls the motor 12 to rotate, so that the electric vehicle 10 operates. The electric vehicle 10 further includes a vehicle-mounted charger, a dc/dc converter, a battery controller, and the like. The control device 20 may be interfered by the input of the power source 11 during operation, and the electromagnetic interference generated by the control device 20 during operation may affect the operation of the control device 20, and thus the operation of the electric vehicle 10. In response to these problems, the present application provides a control device 20.

The following describes the technical solution of the present application and how to solve the technical problem in detail by using specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.

Referring to fig. 2, an embodiment of the present application provides a control device 20 including a driving module 100, a filtering module 200, a first magnetic ring 300, and a second magnetic ring 400. The filter module 200 includes an input terminal and an output terminal, and the driving module 100 also includes an input terminal and an output terminal.

The first magnetic ring 300 is sleeved on the bus, and the first magnetic ring 300 is used for suppressing the high-frequency interference of the first signal when the power supply 11 inputs the first signal to the filtering module 200. The first magnetic ring 300 is a ring-shaped magnetic conductor. The power supply 11 inputs a first signal to the filtering module 200, and the first magnetic ring 300 is used for suppressing high frequency interference of the first signal. The power supply 11 refers to a power supply that can supply direct current. The first signal is an electrical signal, a high-frequency interference signal may exist in the first signal transmitted to the filtering module 200 by the power supply 11, and the arrangement of the first magnetic ring 300 may suppress the high-frequency interference signal in the first signal, so as to avoid the high-frequency interference in the signal entering the filtering module 200. High frequency interference refers to high frequency electromagnetic interference. Electromagnetic interference includes conducted interference and radiated interference. Conducted interference refers to interference of signals on one electrical network to another electrical network through a conductive medium; radiated interference refers to the interference source coupling (interfering) its signal to another electrical network by control. The high frequency interference in the first signal is conducted interference. The present embodiment does not set any limitation to the kind, material, and the like of the first magnetic ring 300 as long as the function thereof can be achieved. The frequency of the high-frequency interference is 3MHz-30 MHz.

The input end of the filter module 200 is used for being connected with a bus of the power supply 11, and the output end of the filter module 200 is connected with the input end of the driving module 100. The filtering module 200 is used for filtering the first signal to filter interference. The first signal inputted from the power source 11 to the filtering module 200 will pass through the first magnetic ring 300 before entering the filtering module 200 to suppress the high frequency electromagnetic interference. After the first signal enters the filter module 200, the filter module 200 will filter other signals except the high frequency interference in the first signal. And the filter module 200 can also filter out high-frequency interference generated during the operation of the driving module 100. The interference generated by the driving module 100 during operation is radiation interference. The specific structure of the filtering module 200 is not limited in this embodiment, as long as the function thereof can be achieved.

The second magnetic ring 400 is connected to a driving module 100, and the driving module 100 is used for driving the motor 12 connected to the control device 20, so as to operate or stop the motor 12. The second magnetic ring 400 is used for suppressing high frequency interference generated during the operation of the motor 12.

The second magnetic ring 400 and the first magnetic ring 300 may be made of the same kind and material, and the description of the second magnetic ring 400 may refer to the above detailed description of the first magnetic ring 300 and will not be repeated herein. The second magnetic ring 400 can inhibit the high-frequency interference generated during the operation of the motor 12 from being transmitted to the control device 20, so as to avoid the influence of the high-frequency interference on the normal operation of the control device 20.

In an alternative embodiment, the control device 20 includes a housing, the housing is provided with a receiving cavity, and the driving module 100, the filtering module 200, the first magnetic ring 300 and the second magnetic ring 400 are all disposed in the receiving cavity. The casing can shield the influence of the external environment on each device in the accommodating cavity, and meanwhile, the influence of the interference generated by the accommodating cavity driving module 100 in the operation process on the devices (the vehicle-mounted charger, the direct current/direct current converter and the battery controller) connected with the control device 20 can be avoided, so that the practicability and the reliability of the control device 20 can be improved.

In an alternative embodiment, the control apparatus 20 further includes a control module 500 and a shielding module 600, as shown in fig. 3, the control module 500 is connected to the driving module 100 for controlling the driving module 100 to drive the motor 12 to operate or stop operating. The shielding module 600 is disposed between the control module 500 and the driving module 100, and is used for shielding a high-frequency interference signal generated during the operation of the driving module 100, so as to avoid affecting the operation of the control module 500, and thus, the reliability of the control device 20 can be improved. The shielding module 600 is made of an iron-aluminum alloy.

The operating principle of the control device 20 provided by the embodiment of the present application is as follows:

when the control device 20 starts to operate, the power supply 11 provides a first signal to the filter module 200 of the control device 20. High frequency interference in the first signal can be suppressed by the first magnetic loop 300; after the first signal enters the filtering module 200, the filtering module 200 can filter out low frequency interference and medium frequency interference in the first signal except for high frequency interference. Meanwhile, the filter module 200 can also filter out high-frequency interference generated during the operation of the driving module 100. The driving module 100 drives the motor 12 to operate according to the signal, and the second magnetic ring 400 can suppress high-frequency interference generated during the operation of the motor 12.

The control device 20 provided by the embodiment of the application includes a driving module 100, a filtering module 200, a first magnetic ring 300, and a second magnetic ring 400. The input end of the filter module 200 is used for being connected with a bus of the power supply 11, the output end of the filter module 200 is connected with the input end of the driving module 100, the first magnetic ring 300 is sleeved on the bus, and the second magnetic ring 400 is connected with the driving module 100. The control device 20 provided in the embodiment of the present application can suppress the high frequency interference in the first signal output from the power supply 11 to the control device 20 through the first magnetic ring 300; the filtering module 200 can filter other interference except the high-frequency interference in the first signal, and can also filter the high-frequency interference generated by the driving module 100; the second magnetic ring 400 can suppress the high-frequency interference of the motor 12 coupled to the control device 20, so that the interference on the control device 20 and the interference generated by the control device 20 can be processed, the anti-interference capability (electromagnetic compatibility) of the control device 20 can be improved, and further, the electric vehicle 10 is prevented from being stopped or anchored due to the electromagnetic compatibility problem of the control device 20 in the driving process.

Referring to fig. 4, in one embodiment, the filter module 200 includes a first filter circuit 210, a second filter circuit 220, and a third filter circuit 230. The first filter circuit 210 includes an input terminal and an output terminal, the second filter circuit 220 includes an input terminal and an output terminal, and the third filter circuit 230 includes an input terminal and an output terminal.

The input of the first filter circuit 210 is connected to the bus for filtering low frequency interference. The input terminal of the first filter circuit 210 is used as the input terminal of the filter module 200, and is connected to the bus of the power supply 11. When the first signal enters the filter module 200, it first passes through the first filter circuit 210. The first filter circuit 210 may filter out low frequency interference in the first signal. Low frequency interference refers to low frequency electromagnetic interference. The present embodiment does not set any limitation to the structure of the first filter circuit 210 as long as the function thereof can be achieved. The frequency of the low-frequency interference is 30KHz-30 KHz.

An input terminal of the second filter circuit 220 is connected to an output terminal of the first filter circuit 210, and is used for filtering the if interference. The input end of the second filter circuit 220 is connected to the output end of the first filter circuit 210, and is capable of receiving the first signal after filtering the low-frequency interference, and the second filter circuit 220 is capable of filtering the intermediate-frequency interference in the first signal. The present embodiment does not set any limitation to the structure of the second filter circuit 220 as long as the function thereof can be achieved. The frequency of the medium frequency interference is 300KHz-3000 KHz.

The input end of the third filter circuit 230 is connected to the output end of the second filter circuit 220, and the output end of the third filter circuit 230 is connected to the driving module 100. The third filter circuit 230 receives the first signal filtered by the second filter circuit 220 to remove the if interference, and inputs the first signal to the driving module 100. The driving module 100 receives the first signal, that is, the driving module 100 receives the dc power provided by the power source 11. The driving module 100 generates high frequency interference during operation, and the third filter circuit 230 can filter the high frequency interference. The high frequency interference refers to high frequency electromagnetic interference coupled to the third filter circuit 230 during the operation of the driving module 100. The present embodiment does not set any limitation to the structure of the third filter circuit 230 as long as the function thereof can be achieved.

In the present embodiment, the first filter circuit 210, the second filter circuit 220, and the third filter circuit 230 are respectively disposed to filter low-frequency interference and medium-frequency interference in the first signal, and high-frequency interference generated by the driving module 100. Therefore, the interference of each frequency band in the first signal entering the driving module 100 can be almost filtered, the working stability of the driving module 100 can be provided, and meanwhile, the influence of the high-frequency interference generated in the working process of the driving module 100 on other devices in the control device 20 can be eliminated, so that the practicability and the reliability of the control device 20 can be improved.

Referring to fig. 5, in one embodiment, the first filter circuit 210 includes at least two capacitors C1, C2 and C3.

At least two capacitors C1 are connected in parallel between the positive pole and the negative pole of the bus, namely, the first end of the capacitor C1 is connected with the positive pole of the bus, the second end of the capacitor C1 is connected with the negative pole of the bus, and the capacitors C1 are connected in parallel. Both ends of the capacitor C1 are connected to the bus as the input end of the first filter circuit 210. Each capacitor C1 is a differential mode capacitor, which refers to a capacitor connected between the phase and neutral lines, i.e., between the positive and negative poles of the bus. The capacitance value of each capacitor C1 is in the uF level. The number of the capacitors C1 and the capacitance value of the capacitor C1 are not limited in this embodiment, and the user can select the frequency to be filtered according to the actual requirement.

A first terminal of the capacitor C2 is connected to the negative terminal of the bus bar, and a second terminal of the capacitor C2 is connected to ground. A first terminal of the capacitor C3 is connected to the positive terminal of the bus bar, and a second terminal of the capacitor C3 is grounded. The capacitor C2 and the capacitor C3 are both common mode capacitors, and the common mode capacitors are connected between the phase line or the neutral line and the ground, that is, between the anode of the bus and the ground, or between the cathode of the bus and the ground. The capacitance values of the capacitor C2 and the capacitor C3 are all nF-level. The capacitance values of the capacitor C2 and the capacitor C3 are not limited in this embodiment, and the user can select the capacitance values according to the actual application environment.

The first filter circuit 210 provided in this embodiment can filter low-frequency interference only by using a plurality of capacitors, and has a simple structure and a small size.

With continued reference to fig. 5, in one embodiment, the second filter circuit 220 includes a first filter unit 221 and a third magnetic loop 222.

The first filtering unit 221 includes an input terminal and an output terminal. The input of the first filtering unit 221 is connected to the output of the first filtering circuit 210, that is, the input of the first filtering unit 221 is connected to the output of the first filtering circuit 210 as the input of the second filtering circuit 220.

In one embodiment, the first filtering unit 221 includes a capacitor C4, a capacitor C5, and a capacitor C6.

A capacitor C4 and the output terminal of the first filter circuit 210. The output of the first filter circuit 210 includes a positive pole and a negative pole (also the positive and negative poles of the bus), the capacitor C4 includes a first terminal and a second terminal, the first terminal of the capacitor C4 is connected to the negative pole of the first filter circuit 210, and the second terminal of the capacitor C4 is connected to the positive pole of the first filter circuit 210. The capacitance C4 is a differential mode capacitance, and the capacitance value of the capacitance C4 is nF level. The capacitance value of the capacitor C4 is not limited in this embodiment, and the user can select the capacitance value according to the actual application environment.

A first terminal of the capacitor C5 is connected to a first terminal of the capacitor C4, i.e., a first terminal of the capacitor C5 is connected to the negative terminal of the first filter circuit 210, and a second terminal of the capacitor C5 is grounded. A first terminal of the capacitor C6 is connected to the second terminal of the capacitor C4, i.e., a first terminal of the capacitor C6 is connected to the positive terminal of the first filter circuit 210, and a second terminal of the capacitor C6 is grounded. The capacitor C5 and the capacitor C6 are common-mode capacitors, and the capacitance values of the capacitor C5 and the capacitor C6 are all nF-level capacitors. The capacitance values of the capacitor C5 and the capacitor C6 are not limited in this embodiment, and the user can select the capacitance values according to the actual application environment.

The third magnetic loop 222 is disposed between the output terminal of the first filtering unit 221 and the input terminal of the third filtering circuit 230. The output end of the first filter unit 221 is connected to the third filter circuit 230 as the output end of the second filter circuit 220, the output end of the first filter unit 221 is connected to the input end of the third filter circuit 230 through a wire, and the third magnetic ring 222 is disposed on the wire in a penetrating manner. For the description of the third magnetic ring 222, reference may be made to the description of the first magnetic ring 300, and further description is omitted here. In a specific embodiment, the third magnetic ring 222 is a common mode magnetic ring made of manganese zinc.

The second filter circuit 220 provided in this embodiment has a simple structure and is easy to implement.

With continued reference to fig. 5, in one embodiment, the third filter circuit 230 includes a second filter unit 231, a capacitor C7, and a fourth magnetic loop 232.

The second filtering unit 231 includes an input terminal and an output terminal, and the input terminal of the second filtering unit 231 is connected to the output terminal of the second filtering circuit 220 as the input terminal of the third filtering circuit 230.

In one embodiment, the second filtering unit 231 includes a capacitor C8 and a capacitor C9. The first terminal of the capacitor C8 is connected to the output terminal of the second filter circuit 220, and the second terminal of the capacitor C8 is grounded. The first terminal of the capacitor C9 is connected to the output terminal of the second filter circuit 220, and the second terminal of the capacitor C9 is grounded. The output end of the second filter circuit 220 includes a positive electrode and a negative electrode, the first end of the capacitor C8 is connected to the negative electrode of the output end of the second filter circuit 220, and the first end of the capacitor C9 is connected to the positive electrode of the output end of the second filter circuit 220. The capacitor C8 and the capacitor C9 are common mode capacitors. The capacitance values of the capacitor C8 and the capacitor C9 are both in pF level. The capacitance values of the capacitor C8 and the capacitor C9 are not limited in this embodiment, and the user can select the capacitance values according to the actual application environment.

The capacitor C7 is connected to the input of the third filter circuit 230. The input terminal of the third filter circuit 230 includes a positive terminal and a negative terminal, a first terminal of the capacitor C7 is connected to the positive terminal of the input terminal of the third filter circuit 230, and a second terminal of the capacitor C7 is connected to the negative terminal of the input terminal of the third filter circuit 230. The capacitance C7 is a differential mode capacitance, and the capacitance value of the capacitance C7 is nF level. The capacitance value of the capacitor C7 is not limited in this embodiment, and the user can select the capacitance value according to the actual application environment.

The fourth magnetic loop 232 is disposed between the output end of the second filtering unit 231 and the capacitor C7. The output terminal of the second filtering unit 231 includes a positive electrode and a negative electrode, a first terminal of the capacitor C7 is connected to the positive electrode of the output terminal of the second filtering unit 231, and a second terminal of the capacitor C7 is connected to the negative electrode of the output terminal of the second filtering unit 231. The output end of the second filtering unit 231 is connected to the capacitor C7 through a bus, and the fourth magnetic ring 232 is disposed on the bus. For the description of the fourth magnetic ring 232, reference may be made to the description of the first magnetic ring 300 in the above embodiments, and details are not repeated herein. In a specific embodiment, the fourth magnetic ring 232 is a common mode magnetic ring made of nickel-zinc material.

The third filter circuit 230 provided in this embodiment has a simple structure and is easy to implement.

Referring to fig. 6, in one embodiment, the control device 20 further includes a discharge circuit 700. The discharging circuit 700 is connected between the third filter circuit 230 and the driving module 100, and is used for discharging the voltage of the third filter circuit 230. The third filter circuit 230 includes a capacitor C7, and when the third filter circuit 230 works, the capacitor C7 is charged, and the voltage in the capacitor C7 is released through the discharging circuit 700 in this embodiment, so as to avoid affecting the operation of the driving module 100. The present embodiment does not set any limitation to the specific structure of the discharge circuit 700 as long as the function thereof can be achieved.

With continued reference to fig. 6, in one embodiment, the discharge circuit 700 includes a first resistor 710, a second resistor 720, and a switch 730.

The first resistor 710 is connected to the output terminal of the third filter circuit 230, and is used for dividing the voltage, i.e. releasing the voltage across the capacitor C7 in the third filter circuit 230. The first resistor 710 includes a first terminal and a second terminal, the first terminal of the first resistor 710 is connected to the positive terminal of the output terminal of the third filter circuit 230, and the second terminal of the first resistor 710 is connected to the negative terminal of the output terminal of the third filter circuit 230. The resistance of the first resistor 710 is not limited in this embodiment, as long as the function thereof can be achieved.

A first terminal of the second resistor 720 is connected to a first terminal of the first resistor 710 for voltage division. A first terminal of the switch 730 is connected to a second terminal of the second resistor 720, and a second terminal of the switch 730 is connected to a second terminal of the first resistor 710. That is, the second resistor 720 and the switch 730 are connected in series and in parallel to both ends of the first resistor 710. When the voltage across the capacitor C7 is large and the first resistor 710 cannot completely release the voltage across the capacitor C7, the control module 500 controls the switch 730 to close, so that the second resistor 720 and the first resistor 710 release the voltage across the capacitor C7 at the same time. This may improve the practicality and reliability of the discharge circuit 700. The present embodiment does not limit the resistance of the second resistor 720 and the type of the switch 730 as long as the functions thereof can be achieved.

The discharge circuit 700 provided by the embodiment has a simple structure, is easy to implement, and has a small volume.

With continued reference to fig. 1, an embodiment of the present application provides an electric vehicle 10, where the electric vehicle 10 includes a power source 11, a motor 12, and a control device 20 as provided in the previous embodiments. The control device 20 is provided between the power source 11 and the motor 12. The power source 11 is a power source for supplying dc power, and the motor 12 is an ac motor. The control module 500 in the control device 20 controls the driving module 100 to convert the received dc power into ac power, to supply power to the motor 12, and to drive the motor 12 to operate. In one particular embodiment, the electric machine 12 is a permanent magnet synchronous machine.

The electric vehicle 10 provided in the present embodiment includes the control device 20, and therefore the electric vehicle 10 has all the structures and advantages of the control device 20, which are not described herein again.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A control device is characterized by comprising a driving module, a filtering module, a first magnetic ring and a second magnetic ring; the input end of the filtering module is used for being connected with a bus of a power supply, the output end of the filtering module is connected with the input end of the driving module, the first magnetic ring is sleeved on the bus, and the second magnetic ring is connected with the driving module;

the first magnetic ring is used for inhibiting high-frequency interference of a first signal when the power supply inputs the first signal to the filtering module;

the driving module is used for driving a motor connected with the control device;

the filtering module is used for filtering the first signal and filtering interference generated by the driving module in the operation process;

and the second magnetic ring is used for inhibiting high-frequency interference generated in the running process of the motor.

2. The control device of claim 1, wherein the filtering module comprises:

the input end of the first filter circuit is connected with the bus and used for filtering low-frequency interference;

the input end of the second filter circuit is connected with the output end of the first filter circuit and is used for filtering intermediate frequency interference;

and the input end of the third filter circuit is connected with the output end of the second filter circuit, the output end of the third filter circuit is connected with the driving module, and the third filter circuit is used for filtering high-frequency interference generated in the operation process of the driving module.

3. The control device according to claim 2, wherein the first filter circuit includes:

at least two capacitors C1 connected in parallel between the positive and negative poles of the bus;

a capacitor C2, wherein a first end of the capacitor C2 is connected with the negative pole of the bus bar, and a second end of the capacitor C2 is grounded;

a capacitor C3, wherein a first end of the capacitor C3 is connected with the positive pole of the bus bar, and a second end of the capacitor C3 is grounded.

4. The control device according to claim 2, wherein the second filter circuit includes:

the input end of the first filtering unit is connected with the output end of the first filtering circuit;

and the third magnetic ring is arranged between the output end of the first filtering unit and the input end of the third filtering circuit.

5. The control device according to claim 4, wherein the first filtering unit includes:

the capacitor C4 is connected with the output end of the first filter circuit;

a capacitor C5, a first terminal of the capacitor C5 being connected to a first terminal of the capacitor C4, a second terminal of the capacitor C5 being connected to ground;

a capacitor C6, wherein a first terminal of the capacitor C6 is connected to a second terminal of the capacitor C4, and a second terminal of the capacitor C6 is grounded.

6. The control device according to claim 2, wherein the third filter circuit includes:

the input end of the second filtering unit is connected with the output end of the second filtering circuit;

a capacitor C7 connected with the input end of the third filter circuit;

and the fourth magnetic ring is arranged between the output end of the second filtering unit and the capacitor C7.

7. The control device according to claim 6, wherein the second filtering unit includes:

a capacitor C8, wherein a first terminal of the capacitor C8 is connected with the output terminal of the second filter circuit, and a second terminal of the capacitor C8 is grounded;

a capacitor C9, wherein a first terminal of the capacitor C9 is connected to the output terminal of the second filter circuit, and a second terminal of the capacitor C9 is grounded.

8. The control device according to claim 2, characterized by further comprising:

and the discharging circuit is connected between the third filter circuit and the driving module and used for releasing the voltage in the third filter circuit.

9. The control device of claim 6, wherein the discharge circuit comprises:

the first resistor is connected with the output end of the third filter circuit and used for voltage division;

the first end of the second resistor is connected with the first end of the first resistor and used for voltage division;

and a first end of the switch is connected with the second end of the second resistor, and a second end of the switch is connected with the second end of the first resistor.

10. An electric vehicle characterized by comprising a power source, a motor, and the control device according to any one of claims 1 to 9; the control device is disposed between the power source and the motor.

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