CN113765461A - Motor control device and method and electronic equipment - Google Patents

Abstract

The invention discloses a motor control device, method and electronic equipment. The motor control device includes: a control unit, a first signal switching component, and N power components; n of the N power components are connected to the motor; N is greater than or equal to 2; n is greater than or equal to 1, and n is less than N; the control unit is configured to output a first control signal to the first signal switching unit when detecting that there is a faulty power unit in the n power units; the first signal switching unit is configured to respond The first control signal disconnects the faulty power component from the motor, and selects a new power component from the N-n remaining power components to connect with the motor. In this way, when some power components in the motor control device fail, normal power components can be used to replace the faulty power components to ensure the normal operation of the motor control device, thereby ensuring the stability of the motor control system.

Description

Motor control device, method and electronic device

technical field

The present invention relates to the technical field of motors, and in particular, to a motor control device, method and electronic device.

Background technique

With the rapid development of modern information, motors can be seen everywhere in today's life and production, from children's electric toys, electric fans, air conditioners, etc., to the automobile industry, aerospace industry, etc., people's lives are indispensable for motors. The motor plays a very important role, and the importance of its stable operation can be imagined.

However, in the related art, the motor control device for controlling the motor still needs to be optimized.

SUMMARY OF THE INVENTION

In order to solve the related technical problems, embodiments of the present invention provide a motor control apparatus, method, and electronic device.

The technical solution of the embodiment of the present invention is realized as follows:

An embodiment of the present invention provides a motor control device, including: a control unit, a first signal switching component, and N power components; n of the N power components are connected to a motor; N is greater than or equal to 2; n is greater than or equal to 1, and n is less than N; where,

the control unit, configured to output a first control signal to the first signal switching part when detecting that a faulty power part exists in the n power parts;

The first signal switching part is used for disconnecting the faulty power part and the motor in response to the first control signal, and selecting a new power part and the motor from the N-n remaining power parts to connect.

In the above solution, the number of the control units is N; each control unit in the N control units is connected to one power component in the N power components; wherein,

When the control unit detects that the power component connected to itself is a faulty power component, it outputs a first control signal to the first signal switching component;

In response to the received at least one first control signal, the first signal switching component disconnects the faulty power component corresponding to each first control signal in the at least one first control signal and the motor, and switches from N-n At least one of the remaining power components is selected as a new power component to be connected to the electric machine.

In the above solution, when the control unit detects that there are m faulty power components among the n power components, it outputs a first control signal to the first signal switching component; m is greater than or equal to 1;

The first signal switching part disconnects the m faulty power parts from the motor in response to the first control signal, and selects m new power parts from the N-n remaining power parts to be connected to the motor. Connect the motor.

In the above solution, the device further includes a second signal switching component; wherein,

The control unit is further configured to: output a second control signal to the second signal switching component when detecting that there are m faulty power components in the n power components;

The second signal switching unit is configured to disconnect the m faulty power units from the control unit in response to the second control signal, and select m new power units from the N-n remaining power units components are connected to the control unit; wherein,

The m new power components selected by the second signal switching component are the same as the m new power components selected by the first signal switching component.

In the above solution, the first signal switching component includes a plurality of power electron tubes or DC contactors; wherein,

The power electronic tube or the DC contactor is used for conducting or disconnecting the connection between the corresponding power component and the motor.

In the above solution, the second signal switching component includes a plurality of power electron tubes or DC contactors; wherein,

The power electronic tube or the DC contactor is used for making or breaking the connection between the corresponding power component and the control unit.

An embodiment of the present invention also provides a motor control method, which is used in a control unit of a motor control device; including:

The control unit detects that a faulty power part exists in the n power parts in the motor control device;

The control unit outputs a first control signal to the first signal switching part of the motor control device, so as to control the first signal switching part to disconnect the faulty power part from the motor, and use the N-n remaining power A new power component is selected from the components to be connected with the motor; wherein,

The motor control device includes N power components; n of the N power components are connected to the motor; N is greater than or equal to 2; n is greater than or equal to 1, and n is less than N.

In the above solution, the number of the control units is N; each control unit in the N control units is connected to one power component of the N power components; the method further includes:

At least one of the N control units detects that the power component connected to itself is a faulty power component;

At least one control unit of the N control units outputs a first control signal to the first signal switching part, so as to control the first signal switching part to disconnect each first control signal of the at least one first control signal received Control the connection of the faulty power component corresponding to the signal with the motor, and select at least one of the N-n remaining power components as a new power component to connect with the motor.

In the above scheme, the method also includes:

The control unit detects that there are m faulty power components in the n power components;

The control unit outputs a first control signal to the first signal switching part, so as to control the first signal switching part to disconnect the m faulty power parts from the motor, and switch the power from the N-n remaining power parts Select m new power components from the components to connect with the motor; wherein,

m is greater than or equal to 1.

An embodiment of the present invention also provides an electronic device, including: a motor and the motor control device according to any one of the above solutions; wherein,

The motor control device controls the operation of the motor.

In the motor control device, method, and electronic device provided by the embodiments of the present invention, the motor control device includes: a control unit, a first signal switching component, and N power components; n power components among the N power components and a motor connection; N is greater than or equal to 2; n is greater than or equal to 1, and n is less than N; wherein, the control unit is configured to send the first signal to the first signal when detecting that there is a faulty power unit in the n power units The switching component outputs a first control signal; the first signal switching component is used to disconnect the faulty power component from the motor in response to the first control signal, and select from N-n remaining power components New power components are connected to the electric machine. In the solution of the embodiment of the present invention, the faulty power component is detected by the control unit, and when the faulty power component is detected, a first control signal is output to the first signal switching component, so as to control the first signal switching component to disconnect the faulty power component from the motor In this way, when some power components in the motor control device fail, the normal power components can be used to replace the faulty power components to ensure the normal operation of the motor control device. So as to ensure the stability of the motor control system.

Description of drawings

1 is a schematic structural diagram of a motor control system according to an embodiment of the present invention;

2 is a schematic structural diagram of a motor control device according to an embodiment of the present invention;

3 is a schematic structural diagram 1 of a motor control system of a three-phase permanent magnet synchronous motor according to an embodiment of the present invention;

4 is a second structural schematic diagram of a motor control system of a three-phase permanent magnet synchronous motor according to an embodiment of the present invention;

5 is a schematic flowchart of a motor control method according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed ways

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments of the description.

In the related art, a motor control system usually includes a motor control device (also called a motor controller) and a motor; in order to ensure the stability of the operation of the motor control system, there are various multiple redundant schemes for motors; The principle of the redundancy scheme is that a motor can have multiple windings at the same time. When one winding is abnormal, the redundant windings can still work normally, so as to ensure the normal operation of the motor and improve the stability of the motor control system. However, in practical application, there is a situation in which the motor control device is faulty or damaged. At this time, the faulty or damaged motor control device cannot control the motor normally, that is, the motor control system cannot operate normally.

Based on this, in various embodiments of the present invention, a multi-redundancy solution for the motor control device is proposed; as shown in FIG. 1 , the working principle of the multi-redundancy solution for the motor control device in the embodiment of the present invention is: the motor The control system includes a motor control device 101 and a motor 102; the motor control device 101 is used to drive the motor 102 to run; the motor control device 101 is provided with a redundant component system composed of N sub-redundant components, where N is an integer greater than or equal to 1; Each sub-redundant component in the N sub-redundant components has the same function, and each sub-redundant component is mutually backup; in practical application, the components that need redundancy determined according to user requirements may be collectively referred to as sub-redundant components. redundant components; the sub-redundant components include at least power components, and when the motor control device 101 works normally, any sub-redundant component in the N sub-redundant components can operate independently, thereby enabling the motor control system to operate normally; Of course, when the rated power of the motor 102 controlled by the motor control device 101 needs to be increased, the motor control device 101 can also run multiple sub-redundant components (equivalent to multiple sets of power bridges) at the same time. In this way, when some sub-redundant components are faulty or damaged, the motor control device 101 can detect the faulty or damaged sub-redundant components, and switch the faulty or damaged sub-redundant components to other normal sub-redundant components components to ensure the normal operation of the motor control device 101, thereby ensuring the stability of the motor control system.

An embodiment of the present invention provides a motor control device. As shown in FIG. 2 , the motor control device includes: a control unit 21 , a first signal switching component 22 and N power components 23 ; among the N power components 23 The n power components 23 of are connected to the motor; N is greater than or equal to 2; n is greater than or equal to 1, and n is less than N; wherein,

the control unit 21, configured to output a first control signal to the first signal switching part 22 when detecting that a faulty power part exists in the n power parts 23;

The first signal switching part 22 is used to disconnect the faulty power part from the motor in response to the first control signal, and select a new power part from the N-n remaining power parts 23 to be connected to the motor. Connect the motor described above.

Here, it should be noted that, in various embodiments of the present invention, the meaning of connecting one component (referred to as a first component in the subsequent description) with another component (referred to as a second component in the subsequent description) Yes: turn on the physical line connected between the first part and the second part, that is, after the power is turned on, the physical line connected between the first part and the second part has current flowing; of course, disconnect the first part and the second part. The meaning of the connection of the components is to make the physical line connected between the first component and the second component no longer have current flow after power-on.

In addition, the motor control system composed of the motor control device provided in the embodiment of the present invention can be applied to any electronic device that needs to drive a motor; for example, the electronic device can be a two-wheeled vehicle or a multi-wheeled vehicle (such as a tricycle or Four-wheeled vehicles) and other means of transport; for another example, the electronic device may also be a children's electric toy, an electric fan, an air conditioner, and the like.

In practical application, the power component 23 is used to convert direct current into alternating current.

In practical application, the first signal switching component 22 may include multiple power electronic tubes or DC contactors; the power electronic tubes or DC contactors may be used to conduct or disconnect the connection between the corresponding power component and the motor. Of course, the R&D personnel can also use other controllable switching devices to build the first signal switching component 22 according to design requirements.

In practical application, in order to more accurately detect whether each power component 23 fails, N control units 21 can be set in the motor control device, and each control unit 21 in the N control units 21 is connected to the One power part 23 among the N power parts 23; in this way, the accuracy of detecting a faulty power part can be improved.

Based on this, in an embodiment, the motor control apparatus may include N control units 21 ; each control unit 21 of the N control units 21 is connected to one power component 23 of the N power components 23 ;in,

When the control unit 21 detects that the power unit 23 connected to itself is a faulty power unit, it outputs a first control signal to the first signal switching unit 22;

In response to the received at least one first control signal, the first signal switching unit 22 disconnects the faulty power unit corresponding to each first control signal in the at least one first control signal and the motor, and switches from N-n At least one of the remaining power components 23 is selected as a new power component to be connected to the electric machine.

Specifically, take the motor control system of a three-phase permanent magnet synchronous motor as an example (there are many forms and types of motor control systems in daily life, and they will not be listed here. The working principle of the motor control system of the motor is the same), as shown in FIG. 3 , the motor control system of the three-phase permanent magnet synchronous motor includes a motor control device 301 and a motor 302, and the motor 302 is a three-phase permanent magnet synchronous motor; the motor control device 301 A redundant component system is provided in the system, and the redundant component system includes N control units 21, N power components 23 and a first signal switching component 22; The function of part 23 and part of the power tubes or DC contactors in the first signal switching part 22 to which the corresponding power part 23 is connected is equivalent to the function of a sub-redundant part shown in FIG. 1; that is, each control unit 21 The motor 302 can be driven to work normally through a power component 23 connected to itself, and the outputs U, V, and W of all the power components 23 are connected in parallel. In practical application, only one control unit 21 may drive the motor 302 to run through a power component 23 connected to itself; in the case of needing to increase the rated power of the motor control device 301, etc., each control unit 21 in the multiple control units 21 may be set. Each unit 21 drives a motor 302 to operate through a power component 23 connected to itself. In the process that the motor control device 301 drives the motor 302 to run, in the case where only one control unit 21 drives the motor 302 to run through a power part 23 connected to itself, when the control unit 21 detects that the power part 23 connected to itself is a faulty power part At the time of outputting a first control signal to the first signal switching part 22 to control the first signal switching part 22 to disconnect the corresponding power part 23 from the motor 302 and connect the power part 23 not connected to the motor 302 One of the power components 23 is randomly selected as a new power component to be connected to the motor 302; in the case where each control unit 21 in at least two control units 21 drives the motor 302 to run through a power component 23 connected to itself, when When at least one of the at least two control units 21 detects that the power unit 23 connected to itself is a faulty power unit, it outputs a first control signal to the first signal switching unit 22 to control the first signal switching unit 22. The signal switching part 22 disconnects at least one corresponding power part 23 from the motor 302, and randomly selects at least one power part 23 among the power parts 23 not connected to the motor 302 to be connected to the motor 302 as a new power part; here, the fault The number of power components and the number of new power components selected by the first signal switching component 22 may be the same or different, and may be specifically set by the research and development personnel according to design requirements.

In practical application, when the motor control device includes N control units 21, there may be a situation in which the control unit 21 is faulty, and the faulty control unit 21 may not be able to output a signal to other components to notify its own status. Therefore, a detection unit can be set in the first signal switching component 22 to detect whether the n control units 21 corresponding to the n power components 23 connected to the motor are faulty, and when at least one faulty control unit is detected 21, disconnect the power components 23 connected to each control unit 21 in the at least one faulty control unit 21 from the motor, and select at least one of the N-n remaining power components 23 as a new power component Connect to the motor.

In practical application, compared with the control unit 21, the power component 23 is a more easily worn component; therefore, in order to save cost, only one control unit 21 may be provided in the motor control device.

Based on this, in an embodiment, the control unit 21 outputs a first control signal to the first signal switching unit 22 when detecting that there are m faulty power units in the n power units 23; m is greater than or is equal to 1;

The first signal switching unit 22 disconnects the m faulty power units from the motor in response to the first control signal, and selects m new power units from the N-n remaining power units 23 to be connected to the motor. The motor is connected.

In practical application, in order to reduce the component loss and power loss caused by the connection between the control unit 21 and each of the N power components 23, a signal switching component can also be set between the control unit 21 and the power components 23 (subsequent It is denoted as the second signal switching component in the description of At the same time, a second control signal may also be output to the second signal switching unit, so as to control the second signal switching unit to disconnect the m faulty power units from the control unit, and to switch from N-n remaining power units Select m new power components to connect with the control unit; here, the m new power components selected by the second signal switching component are the same as the m new power components selected by the first signal switching component ; in this way, power losses and component losses in the motor control device can be reduced.

Based on this, in an embodiment, the motor control device may further include a second signal switching component; wherein,

The control unit 21 may also be configured to: output a second control signal to the second signal switching component when detecting that there are m faulty power components in the n power components 23;

The second signal switching unit can be used to disconnect the m faulty power units from the control unit 21 in response to the second control signal, and select m from the N-n remaining power units 23 A new power component is connected to the control unit 21; wherein,

The m new power components selected by the second signal switching component are the same as the m new power components selected by the first signal switching component.

In practical application, the second signal switching component may include a plurality of power electronic tubes or DC contactors; the power electronic tubes or DC contactors are used to connect or disconnect the corresponding power components 23 and the control unit 21 . Of course, the R&D personnel can also use other controllable switching devices to build the second signal switching component according to the design requirements.

Specifically, also taking the motor control system of the three-phase permanent magnet synchronous motor as an example, as shown in FIG. 4 , the motor control system of the three-phase permanent magnet synchronous motor includes a motor control device 401 and a motor 402, and the motor 402 is a three-phase permanent magnet Synchronous motor; the motor control device 401 is provided with a control unit 21 and a redundant component system, and the redundant component system includes a first signal switching component 22, N power components 23 and a second signal switching component 403; at this time, a The functions of the power components 23, part of the power tubes or DC contactors in the first signal switching component 22 connected to the corresponding power components 23, and part of the power tubes or DC contactors in the second signal switching component 403 connected to the corresponding power components 23 are equivalent The function of a sub-redundant component shown in FIG. 1; the signal input ports of the N power components 23 are connected in parallel with the signal output ports of the control unit 21, and are connected in the middle through the second signal switching component 403, so that the control unit 21 can The corresponding power section(s) 23 are controllably enabled, and the outputs U, V, W of all power sections 23 are connected in parallel. In practical application, the control unit 21 can drive the motor 402 to run through one power component 23; of course, in the case of needing to increase the rated power of the control motor control device 401, etc., the control unit 21 can also be set to drive the motor 402 through multiple power components 23. run. In the process that the motor control device 401 drives the motor 402 to run, in the case that the control unit 21 drives the motor 402 to run through a power component 23, when the control unit 21 detects that the power component 23 is a faulty power component, it will send a message to the first power component 23. The signal switching part 22 outputs a first control signal to control the first signal switching part 22 to disconnect the corresponding power part 23 from the motor 402 , and randomly select a power part 23 among the power parts 23 not connected to the motor 402 As a new power component is connected to the motor 402, and at the same time, a second control signal is output to the second signal switching component 403 to control the second signal switching component 403 to disconnect the corresponding power component 23 from the control unit 21. connected, and randomly select a power part 23 among the power parts 23 not connected to the motor 402 as a new power part to connect with the control unit 21, the first signal switching part 22 is in the power part not connected to the motor 402 A power part 23 randomly selected from the 23 is the same as a power part 23 randomly selected by the second signal switching part 403 among the power parts 23 not connected to the motor 402; the control unit 21 drives the motor through a plurality of power parts 23 When 402 is running, when the control unit 21 detects that there is at least one faulty power unit in the plurality of power units 23, it outputs a first control signal to the first signal switching unit 22 to control the first signal The switching part 22 disconnects the at least one faulty power part from the motor 402, and randomly selects at least one power part 23 from the power parts 23 not connected to the motor 402 as a new power part to be connected to the motor 402, and at the same time, to the motor 402. The second signal switching component 403 outputs a second control signal, so as to control the second signal switching component 403 to disconnect the at least one faulty power component from the control unit 21 , and to switch off the connection with the motor 402 when the at least one faulty power component is not connected to the motor 402 . At least one power part 23 is randomly selected among the power parts 23 to be connected to the control unit 21 as a new power part, and the first signal switching part 22 is at least one power part randomly selected among the power parts 23 not connected to the motor 402 23 is the same as at least one power part 23 randomly selected by the second signal switching part 403 among the power parts 23 not connected to the motor 402; The number of power components can be the same or different, which can be set by the R&D personnel according to the design requirements. The motor control device provided by the embodiment of the present invention includes: a control unit 21, a first signal switching part 22, and N power parts 23; n power parts 23 of the N power parts 23 are connected to the motor; N is greater than or is equal to 2; n is greater than or equal to 1, and n is less than N; wherein, the control unit 21 is configured to switch the unit 22 to the first signal when detecting that there is a faulty power unit in the n power units 23 outputting a first control signal; the first signal switching part is used for responding to the first control signal, disconnecting the faulty power part and the motor, and selecting a new one from the N-n remaining power parts 23 The power components are connected to the motor; in this way, when some power components in the motor control device fail, the normal power components can be used to replace the faulty power components to work to ensure the normal operation of the motor control device, thereby ensuring the motor control system stability.

Based on the above embodiments of the motor control device, an embodiment of the present invention further provides a motor control method, which is applied to the control unit of the motor control device according to any of the above motor control device embodiments. As shown in FIG. 5 , the method includes: The following steps:

Step 501: the control unit detects that there is a faulty power component in the n power components in the motor control device;

Step 502 : the control unit outputs a first control signal to the first signal switching part of the motor control device, so as to control the first signal switching part to disconnect the faulty power part from the motor, and switch from N-n Select a new power component from the remaining power components to connect with the motor;

Here, the motor control device includes N power components; n of the N power components are connected to the motor; N is greater than or equal to 2; n is greater than or equal to 1, and n is less than N.

In an embodiment, the number of control units is N; each control unit in the N control units is connected to one power component in the N power components; the method may further include:

At least one of the N control units detects that the power component connected to itself is a faulty power component;

At least one control unit of the N control units outputs a first control signal to the first signal switching part, so as to control the first signal switching part to disconnect each first control signal of the at least one first control signal received Control the connection of the faulty power component corresponding to the signal with the motor, and select at least one of the N-n remaining power components as a new power component to connect with the motor.

In one embodiment, the method may further include:

The control unit detects that there are m faulty power components in the n power components;

The control unit outputs a first control signal to the first signal switching part, so as to control the first signal switching part to disconnect the m faulty power parts from the motor, and switch the power from the N-n remaining power parts Select m new power components from the components to connect with the motor; wherein,

m is greater than or equal to 1.

Correspondingly, when the control unit detects that there are m faulty power components among the n power components, the method may further include:

The control unit outputs a second control signal to the second signal switching part of the motor control device, so as to control the second signal switching part to disconnect the m faulty power parts from the control unit, and from Select m new power components from the N-n remaining power components to connect with the control unit; wherein,

The m new power components selected by the second signal switching component are the same as the m new power components selected by the first signal switching component.

It should be noted that the motor control method provided by the embodiment of the present invention belongs to the same concept as the above-mentioned motor control device embodiment, and the specific implementation process thereof is detailed in the above-mentioned motor control device embodiment, which will not be repeated here.

Based on the foregoing motor control device embodiments, and in order to implement the motor control method of the present invention, an embodiment of the present invention further provides an electronic device. As shown in FIG. 6 , the electronic device 600 includes: a motor control device 601 and a motor 602 ;in,

The motor control device 601 is the motor control device described in any one of the above motor control device embodiments; the motor control device 601 controls the operation of the motor 602 .

The motor control device, method, and electronic device provided by the embodiments of the present invention have the following advantages:

When some power components in the motor control device fail, normal power components can be used to replace the faulty power components to ensure that the motor control device drives the motor normally, thereby ensuring the stability of the motor control system.

It should be noted that "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence.

In addition, the technical solutions described in the embodiments of the present invention may be combined arbitrarily if there is no conflict.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (10)

1. A motor control device, comprising: a control unit, a first signal switching component and N power components; n power components in the N power components are connected to a motor; N is greater than or equal to 2; n is greater than or equal to 1, and n is less than N; where, the control unit, configured to output a first control signal to the first signal switching part when detecting that a faulty power part exists in the n power parts; The first signal switching part is used for disconnecting the faulty power part and the motor in response to the first control signal, and selecting a new power part and the motor from the N-n remaining power parts to connect. 2 . The device according to claim 1 , wherein the number of the control units is N; each control unit in the N control units is connected to one power component in the N power components; wherein, When the control unit detects that the power component connected to itself is a faulty power component, it outputs a first control signal to the first signal switching component; In response to the received at least one first control signal, the first signal switching component disconnects the faulty power component corresponding to each first control signal in the at least one first control signal and the motor, and switches from N-n At least one of the remaining power components is selected as a new power component to be connected to the electric machine. 3. The apparatus according to claim 1, wherein the control unit outputs a first control signal to the first signal switching component when detecting that there are m faulty power components in the n power components; m is greater than or equal to 1; The first signal switching part disconnects the m faulty power parts from the motor in response to the first control signal, and selects m new power parts from the N-n remaining power parts to be connected to the motor. Connect the motor. 4. The device according to claim 3, characterized in that, the device further comprises a second signal switching component; wherein, The control unit is further configured to: output a second control signal to the second signal switching component when detecting that there are m faulty power components in the n power components; The second signal switching unit is configured to disconnect the m faulty power units from the control unit in response to the second control signal, and select m new power units from the N-n remaining power units components are connected to the control unit; wherein, The m new power components selected by the second signal switching component are the same as the m new power components selected by the first signal switching component. 5. The device according to any one of claims 1 to 4, wherein the first signal switching component comprises a plurality of power electron tubes or DC contactors; wherein, The power electronic tube or the DC contactor is used for conducting or disconnecting the connection between the corresponding power component and the motor. 6. The device according to claim 4, wherein the second signal switching component comprises a plurality of power electron tubes or DC contactors; wherein, The power electronic tube or the DC contactor is used for making or breaking the connection between the corresponding power component and the control unit. 7. A motor control method for a control unit of a motor control device; characterized in that, comprising: The control unit detects that a faulty power part exists in the n power parts in the motor control device; The control unit outputs a first control signal to the first signal switching part of the motor control device, so as to control the first signal switching part to disconnect the faulty power part from the motor, and use the N-n remaining power A new power component is selected from the components to be connected with the motor; wherein, The motor control device includes N power components; n of the N power components are connected to the motor; N is greater than or equal to 2; n is greater than or equal to 1, and n is less than N. 8 . The method according to claim 7 , wherein the number of the control units is N; each control unit in the N control units is connected to one power component in the N power components; the Methods also include: At least one of the N control units detects that the power component connected to itself is a faulty power component; At least one control unit of the N control units outputs a first control signal to the first signal switching part, so as to control the first signal switching part to disconnect each first control signal of the at least one first control signal received Control the connection of the faulty power component corresponding to the signal with the motor, and select at least one of the N-n remaining power components as a new power component to connect with the motor. 9. The method according to claim 7, wherein the method further comprises: The control unit detects that there are m faulty power components in the n power components; The control unit outputs a first control signal to the first signal switching part, so as to control the first signal switching part to disconnect the m faulty power parts from the motor, and switch the power from the N-n remaining power parts Select m new power components from the components to connect with the motor; wherein, m is greater than or equal to 1. 10. An electronic device, comprising: a motor and the motor control device according to any one of claims 1 to 6; wherein, The motor control device controls the operation of the motor.

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