CN213185950U - Motor inverter, controller and control system - Google Patents

Abstract

The application provides a motor inverter, a controller and a control system, and relates to the technical field of motor driving. The motor inverter includes: a multiphase inverter bridge connected in parallel; a first output lead of the multiphase inverter bridge is used for connecting a control end of the motor, and a first dial switch is arranged on the first output lead of each phase of the inverter bridge; the first dial switch is used for controlling the connection and disconnection of a connection passage between each phase of the inverter bridge and the motor. The motor inverter can be used universally.

Description

Motor inverter, controller and control system

Technical Field

The application relates to the technical field of motor driving, in particular to a motor inverter, a controller and a control system.

Background

The motor control is mainly performed by a motor controller, and the core of the motor controller is a motor inverter.

At present, a common motor inverter usually only has an inverter circuit with a preset phase number, and the inverter circuits required by different types of motors have different phase numbers, so that the motor inverter with the inverter circuit with the preset phase number can only realize one type of motor control, and cannot realize universal control of various types of motors.

That is to say, the universality of the motor control of the motor inverter in the existing scheme is poor, and the universal control of various types of motors cannot be realized.

SUMMERY OF THE UTILITY MODEL

The present application is directed to provide a motor inverter, a motor controller, and a control system, so as to implement a universal control of one motor inverter for multiple types of motors.

In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:

in a first aspect, an embodiment of the present application provides a motor inverter, including: a multiphase inverter bridge connected in parallel; the first output lead of the multiphase inverter bridge is used for connecting a control end of a motor, and a first dial switch is arranged on the first output lead of each phase of the multiphase inverter bridge;

the first dial switch is used for controlling the connection and disconnection of a connecting passage between each phase of the inverter bridge and the motor.

Optionally, the first dial switch is further connected to an indication device to indicate a state of the first dial switch, where the state of the first dial switch is used to represent on/off of a connection path between the corresponding inverter bridge and the motor.

Optionally, the indicating device is: a display device.

Optionally, if the indication device indicates that the two first dial switches are turned off, the motor is a brushed direct current motor; or, if the indication device indicates that the three first dial switches are turned off, the motor is a brushless direct current motor, or a permanent magnet synchronous motor; or, if the indicating equipment indicates that the four first dial switches are turned off, the motor is a two-phase stepping motor.

Optionally, a second toggle switch is further disposed on a second output lead of an output end of each adjacent inverter bridge in at least two groups of adjacent inverter bridges in the multiphase inverter bridge; the second dial switch is used for controlling the connection and disconnection of the connection path between each group of adjacent inverter bridges and the motor;

the second dial switch is also connected with the indicating equipment so as to indicate the state of the second dial switch, and the state of the second dial switch is used for representing the on-off of a connecting passage between the corresponding adjacent inverter bridge and the motor.

Optionally, if the indication device indicates that the two second dial switches are turned off and the first dial switch is turned on, the motor is a brushed direct current motor.

Optionally, if the indication device indicates that the two second dial switches are turned on but the two first dial switches are turned off, the motor is a brushed direct current motor; or, if the indicating equipment indicates that the two second dial switches are turned on but the three first dial switches are turned off, the motor is a brushless direct current motor or a permanent magnet synchronous motor; or, if the indicating equipment indicates that the two second dial switches are turned on but the four first dial switches are turned off, the motor is a two-phase stepping motor.

Optionally, the multiphase inverter bridge is a four-phase inverter bridge.

In a second aspect, an embodiment of the present application further provides a motor controller, including: in any of the above motor inverters, an output lead of an inverter bridge in the motor inverter is an output terminal of the motor controller.

In a third aspect, an embodiment of the present application further provides a motor control system, including: the motor controller is the motor controller, and the output end of the motor controller is connected with the control end of the motor.

The beneficial effect of this application is:

according to the motor inverter, the controller and the control system provided by the embodiment of the application, the first dial switch is arranged between the output lead of each phase of inverter bridge in the multi-phase inverter bridges connected in parallel and the motor, the on-off of the connecting channel between each phase of inverter bridge and the motor is controlled through the first dial switch, the phase number of the inverter bridge communicated with the motor is controlled through the on-off of the dial switch, the phase number of the inverter bridge actually communicated between the multi-phase inverter bridge and the motor in the motor inverter can be the same as that of the inverter bridge, namely an inverter circuit, required by the type of the motor to be controlled, the flexible matching of the multi-phase inverter bridge and the type of the motor in the motor inverter is realized, the motor inverter can be compatible with various types of motors, and the universal control of the motor inverter on various types of motors is realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a first motor inverter provided in an embodiment of the present application;

fig. 2 is a schematic circuit diagram of a first motor inverter according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a second motor inverter provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of a third motor inverter provided in an embodiment of the present application;

fig. 5 is a schematic circuit diagram of a second motor inverter provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a motor controller according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a motor control system according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, the terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present application, "connected" and/or "connected" should be understood as "electrically connected", "communicatively connected", and the like, if the circuits, modules, units, and the like, which are connected and/or "connected" have electrical signals or data transfer therebetween.

The embodiment of the application provides a motor inverter, a motor controller and a motor control system, and solves the problem that the motor inverter cannot be compatible with different types of motors in the prior art.

The disclosure of the present application will be described in detail with reference to specific examples.

Fig. 1 is a schematic structural diagram of a motor inverter according to an embodiment of the present disclosure; as shown in fig. 1, the motor inverter 100 includes: a multiphase inverter bridge 10 connected in parallel, such as an inverter bridge 11-an inverter bridge 1 n; the first output lead of the multiphase inverter bridge 10 is used for connecting a control end of a motor 30, and a first dial switch 20, such as a first dial switch 21-a first dial switch 2n, is arranged on the first output lead of each phase inverter bridge 10. The first dial switch 20 is used to control the connection path between each phase inverter bridge 10 and the motor 30.

The multiphase inverter bridges 10 are connected in parallel, which means that the power supply terminals of the multiphase inverter bridges 10 are all electrically connected with the same power supply line. The driving end of each phase of the inverter bridge 10 is connected to the output end of the driving circuit to obtain a driving signal from the driving circuit.

For example, each phase inverter bridge 10 may be composed of an upper bridge arm and a lower bridge arm, both of which employ devices that can be turned on and off, such as Metal-Oxide-Semiconductor (MOS) transistors, triodes, and the like. The driving end of each phase inverter bridge 10 includes: the driving ends of the upper bridge arm and the lower bridge arm are connected with the output end of the driving circuit for driving so as to obtain a driving signal from the driving circuit, and the upper bridge arm and the lower bridge arm are controlled to be switched on and off or switched off and switched on under the control of the driving signal, so that the upper bridge arm and the lower bridge arm are alternately switched on.

The driving signal output by the driving circuit may be a PWM (Pulse Width Modulation) signal, and the PWM signal output by the driving circuit to the upper arm and the PWM signal output to the lower arm are complementary signals. The connection point of the upper bridge arm and the lower bridge arm is used as the output end of each phase of the inverter bridge 10 to be connected with a first output lead, and when the upper bridge arm or the lower bridge arm of each phase of the inverter bridge 10 is conducted, an electric signal is output through the first output lead.

The first dial switch 20 is a micro switch which is manually shifted and has an opening state and a closing state, and if the first dial switch 20 is shifted to be opened, a connecting passage between the corresponding inverter bridge 10 and the motor 30 is disconnected; if the first dial switch 20 is toggled to be closed, the corresponding connection path between the inverter bridge 10 and the motor 30 is conducted.

Taking a four-phase inverter bridge as an example, fig. 2 is a schematic circuit diagram of a motor inverter provided in an embodiment of the present application, and as shown in fig. 2, the motor inverter includes: a first inverter bridge 11, a second inverter bridge 12, a third inverter bridge 13 and a fourth inverter bridge 14 connected in parallel. The first inverter bridge 11 is composed of a first MOS transistor T1 and a second MOS transistor T2, and a source electrode of the first MOS transistor T1 is connected to a drain electrode of the second MOS transistor T2; the second inverter bridge 12 is composed of a third MOS transistor T3 and a fourth MOS transistor T4, and a source electrode of the third MOS transistor T3 is connected to a drain electrode of the fourth MOS transistor T4; the third inverter bridge 13 is composed of a fifth MOS transistor T5 and a sixth MOS transistor T6, and the source of the fifth MOS transistor T5 is connected to the drain of the sixth MOS transistor T6; the fourth inversion bridge 14 is composed of a seventh MOS transistor T7 and an eighth MOS transistor T8, and the source of the seventh MOS transistor T7 is connected to the drain of the eighth MOS transistor T8.

The drain of the first MOS transistor T1 is used as the positive power supply terminal of the first inverter bridge 11, and the source of the second MOS transistor T2 is used as the negative power supply terminal of the first inverter bridge 11; the drain of the third MOS transistor T3 is used as the positive power supply terminal of the second inverter bridge 12, and the source of the fourth MOS transistor T4 is used as the negative power supply terminal of the second inverter bridge 12; the drain of the fifth MOS transistor T5 is used as the positive power supply terminal of the third inverter bridge 13, and the source of the sixth MOS transistor T6 is used as the negative power supply terminal of the third inverter bridge 13; the drain of the seventh MOS transistor T7 serves as the positive power supply terminal of the fourth inverter bridge 14, and the source of the eighth MOS transistor T8 serves as the negative power supply terminal of the fourth inverter bridge 14.

The drive end of the first inverter bridge 11 includes: the grid electrode of the first MOS transistor T1 and the grid electrode of the second MOS transistor; the drive end of the second inverter bridge 12 includes: the gate of the third MOS transistor T3 and the gate of the fourth MOS transistor T4; the drive end of the third inverter bridge 13 includes: the grid electrode of the fifth MOS transistor T5 and the grid electrode of the sixth MOS transistor T6; the driving end of the fourth inverter bridge 14 includes: the gate of the seventh MOS transistor T7 and the gate of the eighth MOS transistor T8. The gate of the MOS transistor in each inverter bridge 10 is connected to the output terminal of the driving circuit to obtain the driving signal from the driving circuit.

Positive power supply ends of the first inverter bridge, the second inverter bridge, the third inverter bridge and the fourth inverter bridge are all connected with a positive power supply line, and negative power supply ends of the first inverter bridge, the second inverter bridge, the third inverter bridge and the fourth inverter bridge are all connected with a negative power supply line.

Optionally, the motor inverter further includes: the capacitor circuit is connected between a positive power supply line and a negative power supply, and comprises a first capacitor C1 and a second capacitor C2 which are connected in series as shown in FIG. 2, wherein a first end of the first capacitor C1 is connected with the positive power supply line, a second end of the first capacitor C1 is connected with a first end of the second capacitor C1, and a second end of the second capacitor C2 is connected with the negative power supply line.

The connection point of the two MOS transistors in each inverter bridge 10 serves as the output end of the inverter bridge 10, and is connected to the control end of the motor 30 through a first output lead.

The connection path between the first inverter bridge 11 and the motor 30 is conducted by closing the first dial switch 20 on the first output lead of the first inverter bridge 11, and the connection path between the first inverter bridge 11 and the motor 30 is disconnected by opening the first dial switch 20 on the first output lead of the first inverter bridge 11; the connection path between the second inverter bridge 12 and the motor 30 is conducted by closing the first dial switch 20 on the first output lead of the second inverter bridge 12, and the connection path between the second inverter bridge 12 and the motor 30 is disconnected by opening the first dial switch 20 on the first output lead of the second inverter bridge 12; the connection path between the third inverter bridge 13 and the motor 30 is conducted by closing the first dial switch 20 on the first output lead of the third inverter bridge 13, and the connection path between the third inverter bridge 13 and the motor 30 is disconnected by opening the first dial switch 20 on the first output lead of the third inverter bridge 13; the connection path between the fourth inverter bridge 14 and the motor 30 is turned on by turning off the first dip switch 20 on the first output lead of the fourth inverter bridge 14, and the connection path between the fourth inverter bridge 14 and the motor 30 is turned off by turning on the first dip switch 20 on the first output lead of the fourth inverter bridge 14.

Taking fig. 2 as an example, the working principle of the embodiment of the present application is as follows:

if the first dip switch 20 disposed on the first output lead of any two of the four inverter bridges 10 is turned off, the connection path between the two inverter bridges 10 where the first dip switch 20 is turned off and the motor 30 is turned on, for example, the first dip switch 20 disposed on the first output lead of the first inverter bridge 11 and the second inverter bridge 12 is turned off, the connection paths between the first inverter bridge 11 and the second inverter bridge 12 and the motor 30 are turned on, four driving signals output by the output end of the driving circuit respectively drive the first MOS transistor T1, the second MOS transistor T2, the third MOS transistor T3 and the fourth MOS transistor T4, the first driving signal and the second driving signal are complementary driving signals, the third driving signal and the fourth driving signal are complementary driving signals, the first driving signal and the fourth driving signal are in-phase driving signals, the second driving signal and the third driving signal are in-phase driving signals, namely, the first MOS transistor T1 and the fourth MOS transistor T4 are turned on simultaneously, the second MOS transistor T2 and the third MOS transistor T3 are turned on simultaneously, the first MOS transistor T1 and the second MOS transistor T2 are turned on alternately, and the third MOS transistor T3 and the fourth MOS transistor T4 are turned on alternately. In this case, the motor inverter is supported to supply power to the two-phase motor, and the two-phase motor is driven to rotate.

If the first dial switch 20 disposed on the first output lead of any three of the four inverter bridges 10 is turned off, the connection path between the three inverter bridges 10 where the first dial switch 20 is turned off and the motor 30 is turned on, for example, the first dial switches 20 disposed on the first inverter bridge 11, the second inverter bridge 12, and the third inverter bridge 13 are turned off, the connection paths between the first inverter bridge 11, the second inverter bridge 12, and the third inverter bridge 13 and the motor 30 are turned on, the six paths of driving signals output by the output end of the driving circuit respectively drive the first MOS transistor T1, the second MOS transistor T2, the third MOS transistor T3, the fourth MOS transistor T4, the fifth MOS transistor T5, and the sixth MOS transistor T6, and the conduction modes of the respective bridge arms include: T1T3T6, T1T4T6, T1T4T5, T2T3T6, T2T3T5, and T2T4T5, that is, the MOS transistors of the two upper arms and the MOS transistor of the one lower arm are simultaneously turned on, or the MOS transistor of the one upper arm and the MOS transistors of the two lower arms are turned on. In this case, the motor inverter is supported to supply power to the three-phase motor, and to rotate the three-phase motor.

If the four first dial switches 20 disposed on the first output leads of the four inverter bridges 10 are all turned off, the connection paths between the four inverter bridges 10 and the motor 30, which are turned off by the first dial switches 20, are all turned on, and eight paths of driving signals output by the output end of the driving circuit respectively drive the first MOS transistor T1, the second MOS transistor T2, the third MOS transistor T3, the fourth MOS transistor T4, the fifth MOS transistor T5, the sixth MOS transistor T6, the seventh MOS transistor T7, and the eighth MOS transistor T8, the conduction modes of the MOS transistors of the first inverter bridge 11 and the second inverter bridge 12 are the same as the conduction modes of the MOS transistors when any two first dial switches 20 are turned off, and the conduction modes of the MOS transistors of the third inverter bridge 13 and the fourth inverter bridge 14 are the same as the conduction modes of the MOS transistors when any two first dial switches 20 are turned off, which is not repeated here. In this case, the motor inverter is supported to supply power to the four-phase motor, and the four-phase motor is driven to rotate.

In summary, the embodiment of the present application provides a motor inverter, a first dial switch is disposed between an output lead of each phase inverter bridge in parallel connection and a motor, the on/off of a connection path between each phase inverter bridge and the motor is controlled by the first dial switch, and the number of phases of the inverter bridge together with the motor is controlled by opening or closing the first dial switch, so that the number of phases of the inverter bridge actually conducted between the multiple phase inverter bridge and the motor in the motor inverter can be the same as the number of phases of the inverter bridge, i.e., an inverter circuit, required by the type of the motor to be controlled, and flexible matching between the multiple phase inverter bridge and the type of the motor in the motor inverter is achieved, so that the motor inverter can be compatible with multiple types of motors, and universal control of the motor inverter over multiple types of motors is achieved.

On the basis of the motor inverter shown in fig. 1, an embodiment of the present application further provides a motor inverter, fig. 3 shows a schematic structural diagram of the motor inverter provided in the embodiment of the present application, and as shown in fig. 3, the first dip switch 20 is further connected to an indication device 40 to indicate a state of the first dip switch 20, where the state of the first dip switch 20 is used to represent on/off of a connection path between the corresponding inverter bridge 10 and the motor 30.

Specifically, when the indication device 40 indicates that the first dip switch 20 is turned off, it indicates that the connection path between the inverter bridge 10 corresponding to the first dip switch 20 and the motor 30 is turned on; when the indication device 40 indicates that the first dial switch 20 is opened, it indicates that the connection path between the inverter bridge 10 corresponding to the first dial switch 20 and the motor 30 is disconnected. The indicating device is a device which can indicate two different states of opening and closing.

In an alternative embodiment, the pointing device is: a display device.

Specifically, the display device may be, for example, a digital display screen, the first dial switch 20 adopts a binary coding principle, where 0 denotes that the first dial switch 20 is turned on, and 1 denotes that the first dial switch 20 is turned off. Therefore, if the first dial switch 20 is turned off, a "1" is displayed on the digital display screen, which indicates that the connection path between the inverter bridge 10 corresponding to the first dial switch 20 and the motor 30 is turned on; if the first dial switch 20 is turned on, a "0" is displayed on the digital display screen, which indicates that the connection path between the inverter bridge 10 and the motor 30 corresponding to the first dial switch 20 is disconnected.

According to the embodiment of the application, the state of the first dial switch is indicated through the indicating equipment, so that the on-off condition of the connecting channel between the corresponding inverter bridge and the motor can be visually displayed in the indicating equipment, and a user does not need to confirm the on-off state of the first dial switch.

In an alternative embodiment, if the indication device 40 indicates that both first dip switches 20 are off, the motor 30 is a brushed dc motor.

Specifically, taking the four-phase inverter bridge in fig. 2 as an example, if the indication device 40 indicates that the two first dip switches 20 are turned off, for example, six cases of 0011,0110,1100,1001,1010,0101, the connection path between the two inverter bridges 10 correspondingly connected to the two first dip switches 20 indicating "1" and the motor 30 is turned on, the connection path between the two inverter bridges 10 correspondingly connected to the two first dip switches 20 indicating "0" and the motor 30 is turned off, and the indication device 40 indicates that the motor inverter 100 can be connected to the brushed dc motor currently to supply power to the brushed dc motor.

If the indicating equipment indicates that the three first dial switches are closed, the motor is a brushless direct current motor or a permanent magnet synchronous motor.

Specifically, if the indication device 40 indicates that the three first dip switches 20 are turned off, for example, 1110,1101,1011,0111 can be used as four cases, the connection path between the three inverter bridges 10 correspondingly connected to the three first dip switches 20 indicating "1" and the motor 30 is turned on, the connection path between the one inverter bridge 10 correspondingly connected to the one first dip switch 20 indicating "0" and the motor 30 is turned off, and the indication device 40 indicates that the motor inverter 100 can be connected to the brushless dc motor or the permanent magnet synchronous motor currently by the user to supply power to the brushless dc motor or the permanent magnet synchronous motor.

If the indicating equipment indicates that the four first dial switches are closed, the motor is a two-phase stepping motor.

Specifically, if the indication device 40 indicates that the four first dial switches 20 are turned off, that is, 1111, the connection paths between the four inverter bridges 10 correspondingly connected to the four first dial switches 20 indicating "1" and the motor 30 are turned on, the indication device 40 indicates that the motor inverter 100 can be connected to the two-phase stepping motor currently to supply power to the two-phase stepping motor.

According to the inverter bridge switching-on state indicated by the indicating equipment, a user can directly confirm the state of the first dial switch through the indicating equipment, namely confirm the phase number of the inverter bridge and the motor, and connect the inverter bridge with the motor of the corresponding type according to the communicated phase number, so that the user can visually know the communication condition between the inverter bridge and the motor.

On the basis of the motor inverter shown in fig. 1, the embodiment of the present application further provides a motor inverter. Fig. 4 shows a schematic structural diagram of a motor inverter according to an embodiment of the present application, and as shown in fig. 4, a second dip switch 50, such as second dip switches 51 to 5n, is further disposed on a second output lead of an output end of each adjacent inverter bridge 10 in at least two adjacent groups of inverter bridges 10 in the multiphase inverter bridge 10 of the motor inverter; the second dial switch 50 is used for controlling the connection and disconnection of the connection path between each group of adjacent inverter bridges and the motor 30; the second dial switch 50 is further connected to the indication device 40 to indicate a state of the second dial switch 50, and the state of the second dial switch 50 is used for representing on/off of a connection path between a corresponding adjacent inverter bridge and the motor 30.

Specifically, in the parallel multiphase inverter bridges 10, each group of adjacent inverter bridges includes: in the structure of the motor inverter, the inverter bridges 10 positioned at two sides only have one adjacent inverter bridge 10, the inverter bridge 10 positioned in the middle of the motor inverter has two adjacent inverter bridges 10, each inverter bridge 10 can only form one group of adjacent inverter bridges with one adjacent inverter bridge 10, and if one inverter bridge 10 and the adjacent inverter bridge 10 positioned at the left side form one group of adjacent inverter bridges, the adjacent inverter bridge cannot form one group of adjacent inverter bridges with the adjacent inverter bridge 10 positioned at the right side. The output ends of two inverter bridges 10 in each group of adjacent inverter bridges are connected and connected with the control end of the motor 30 through a second output lead.

Taking four-phase inverter bridges as an example, fig. 5 shows a schematic circuit diagram of a motor inverter according to an embodiment of the present application, as shown in fig. 5, based on the motor inverter shown in fig. 2 according to the embodiment of the present application, the motor inverter according to the embodiment of the present application includes a first set of adjacent inverter bridges formed by a first inverter bridge 11 and a second inverter bridge 12, where an output end of the first inverter bridge 11 is connected to an output end of the second inverter bridge 12, and is connected to a control end of a motor 30 through a second output lead; the third inverter bridge 13 and the fourth inverter bridge 14 form a second group of adjacent inverter bridges, and the output end of the third inverter bridge 13 is connected with the output end of the fourth inverter bridge 14 and is also connected to the control end of the motor 30 through a second output lead. A second dial switch 50 is arranged on a second output lead of the first inverter bridge 11 and the second inverter bridge 12 to control the connection and disconnection of a connecting passage between a first group of adjacent inverter bridges and the motor 30; and a second dial switch 50 is arranged on a second output lead of the third inverter bridge 13 and the fourth inverter bridge 14 to control the connection and disconnection of a connecting passage between the second group of adjacent inverter bridges and the motor 30.

Taking fig. 5 as an example, the working principle of the embodiment of the present application is:

to avoid short circuit failure, the first and second switches 20 and 50 cannot be turned on simultaneously, and when at least one first toggle 20 is turned off, all second toggles 50 must be turned on, and similarly, when at least one second toggle 50 is turned off, all first toggles 20 must be turned on.

Under the condition that the second dial switch 51 is turned off, the first MOS transistor T1 is connected with the third MOS transistor T3 in parallel, and the second MOS transistor T2 is connected with the fourth MOS transistor T4 in parallel to form a new first adjacent inverter bridge; similarly, under the condition that the second toggle switch 52 is turned off, the fifth MOS transistor T5 is connected in parallel with the seventh MOS transistor T7, and the sixth MOS transistor T6 is connected in parallel with the eighth MOS transistor T8, so as to form a new second adjacent inverter bridge. In order to ensure that the motor inverter 100 supplies power to the motor normally, the two second dial switches 50 must be turned off at the same time, the driving circuit outputs four driving signals to drive each bridge arm, the first driving signal is used to drive the first MOS transistor T1 and the third MOS transistor T3, the second driving signal is used to drive the second MOS transistor T2 and the fourth MOS transistor T4, the third driving signal is used to drive the fifth MOS transistor T5 and the sixth MOS transistor T6, the fourth driving signal is used to drive the seventh MOS transistor T7 and the eighth MOS transistor T8, the first driving signal and the second driving signal are complementary driving signals, the third driving signal and the fourth driving signal are complementary driving signals, the first driving signal and the fourth driving signal are in-phase driving signals, the second driving signal and the third driving signal are in-phase driving signals, that is, the first MOS transistor T1, the third MOS transistor T3, the sixth MOS transistor T6 and the eighth MOS transistor T8 are turned on at the same time, and the first MOS transistor T1 is turned on at the same time, The third MOS transistor T3 is alternatively conducted with the second MOS transistor T2 and the fourth MOS transistor T4, and the third MOS transistor T3, the fifth MOS transistor T5 are alternatively conducted with the sixth MOS transistor T6 and the eighth MOS transistor T8. In this case, the motor inverter is supported to supply power to the two-phase motor, and the two-phase motor is driven to rotate.

When the second dial switch 50 is turned on, the on or off condition of the first dial switch 20 and the corresponding operating principle are the same as those of the motor inverter shown in fig. 2, and are not described herein again.

In an alternative embodiment, if the indication device 40 indicates that both second dip switches 50 are closed and the first dip switch 20 is open, the motor 30 is a brushed dc motor.

Specifically, if the indication device 40 indicates that the two second dial switches 50 are turned off and all the first dial switches 20 are turned on, that is, the indication device displays 000011, the first four digits are used for indicating the states of the first dial switches 20, the second two digits are used for indicating the states of the second dial switches 50, the indication device indicates that the connection paths between the two sets of adjacent inverter bridges corresponding to the two second dial switches 50 of "1" and the motor 30 are connected, the indication device 40 indicates that the connection paths between the four inverter bridges 10 corresponding to the four first dial switches 20 of "0" and the motor 30 are disconnected, and the indication device 40 indicates that the motor inverter 100 can be connected to the brushed dc motor currently and supplies power to the brushed dc motor.

In another alternative embodiment, if the indication device 40 indicates that the two second dip switches 50 are on, but the two first dip switches 20 are off, the motor 30 is a brushed dc motor.

Specifically, taking fig. 2 as an example, if the indication device 40 indicates that the two second dial switches 50 are opened and the two first dial switches 20 are closed, for example, six cases of 001100, 011000, 110000, 100100, 101000, and 010100, the connection paths between the two sets of adjacent inverter bridges corresponding to the two second dial switches 50 indicating "0" and the motor 30 are disconnected, the connection paths between the two inverter bridges 10 corresponding to the two first dial switches 20 indicating "1" and the motor 30 are connected, the connection paths between the two inverter bridges 10 corresponding to the two first dial switches 20 indicating "0" and the motor 30 are disconnected, and the indication device 40 indicates that the user can currently connect the motor inverter 100 to the brushed dc motor to supply power to the brushed dc motor.

If the pointing device indicates 40 that two second dip switches 50 are open, but three first dip switches 20 are closed, the motor 30 is a brushless dc motor, or alternatively, a permanent magnet synchronous motor.

Specifically, if the indication device 40 indicates that the two second dial switches 50 are turned on and the three first dial switches 20 are turned off, which may be, for example, 111000,110100,101100,011100, the connection paths between the two groups of adjacent inverter bridges corresponding to the two second dial switches 50 indicating "0" and the motor 30 are disconnected, the connection paths between the three inverter bridges 10 corresponding to the three first dial switches 20 indicating "1" and the motor 30 are connected, the connection path between the one inverter bridge 10 corresponding to the one first dial switch 20 indicating "0" and the motor 30 is disconnected, and the indication device 40 indicates that the motor 100 may be connected to the brushless dc motor or the permanent magnet synchronous motor currently by the user, so as to supply power to the brushless dc motor or the permanent magnet synchronous motor.

If the indication device 40 indicates that the two second dip switches 50 are on but the four first dip switches 20 are off, the motor 30 is a two-phase stepping motor.

Specifically, if the indication device 40 indicates that the two second dial switches 50 are turned on and the four first dial switches 20 are turned off, that is, 111100, the connection paths between the two groups of adjacent inverter bridges corresponding to the two second dial switches 50 indicating "0" and the motor 30 are disconnected, the connection paths between the four inverter bridges 10 corresponding to the four first dial switches 20 indicating "1" and the motor 30 are connected, and the indication device 40 indicates that the motor inverter 100 can be connected to the two-phase stepping motor currently by the user to supply power to the two-phase stepping motor.

According to the embodiment of the application, the output ends of the adjacent inverter bridges are connected, and the second dial switch is arranged on the second output lead between the fast-out section of the adjacent inverter bridges and the motor, so that the number of the inverter bridges is increased in the application process, and the selection mode of the inverter bridges is increased when the motor is powered on.

In an alternative embodiment, the multiphase inverter bridge is a four-phase inverter bridge.

Specifically, the selection of the number of phases of the inverter bridge in the motor inverter is based on the number of phases of the motor inverter which needs to be connected with various different types of motors, so that the purpose of being compatible with different types of motors is achieved, and the universality of the motor inverter is realized.

Fig. 6 shows a schematic structural diagram of the motor controller provided in the embodiment of the present application, and as shown in fig. 6, the motor controller 200 includes the motor inverter 100 in any of the embodiments, and an output lead of an inverter bridge in the motor inverter 100 is an output terminal of the motor controller.

An embodiment of the present application further provides a motor control system, fig. 7 shows a schematic structural diagram of the motor control system provided in the embodiment of the present application, and as shown in fig. 7, the motor control system 300 includes: motor controller 200 and motor 30, wherein, motor controller 200 is motor controller 200 of the above-mentioned embodiment, and the output of motor controller 200 is connected with the control end of motor 30.

The specific implementation process and technical effects of the motor controller and the motor control system are described above, and are not described herein again.

The above is only the embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all shall be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A motor inverter, comprising: a multiphase inverter bridge connected in parallel; the first output lead of the multiphase inverter bridge is used for connecting a control end of a motor, and a first dial switch is arranged on the first output lead of each phase of the multiphase inverter bridge;

the first dial switch is used for controlling the connection and disconnection of a connecting passage between each phase of the inverter bridge and the motor.

2. The motor inverter of claim 1, wherein the first dip switch is further connected to an indication device to indicate a state of the first dip switch, the state of the first dip switch being used to characterize the make and break of a connection path between the corresponding inverter bridge and the motor.

3. The motor inverter of claim 2, wherein the indication device is: a display device.

4. The motor inverter of claim 2, wherein if the indication device indicates that both first dip switches are off, the motor is a brushed dc motor; alternatively, the first and second electrodes may be,

if the indicating equipment indicates that the three first dial switches are closed, the motor is a brushless direct current motor or a permanent magnet synchronous motor; alternatively, the first and second electrodes may be,

and if the indicating equipment indicates that the four first dial switches are closed, the motor is a two-phase stepping motor.

5. The motor inverter of claim 2, wherein a second dip switch is further disposed on a second output lead of the output of each of the at least two adjacent sets of the multiphase inverter bridges; the second dial switch is used for controlling the connection and disconnection of the connection path between each group of adjacent inverter bridges and the motor;

the second dial switch is also connected with the indicating equipment so as to indicate the state of the second dial switch, and the state of the second dial switch is used for representing the on-off of a connecting passage between the corresponding adjacent inverter bridge and the motor.

6. The motor inverter of claim 5, wherein if the indication device indicates that both second dip switches are closed and the first dip switch is open, the motor is a brushed DC motor.

7. The motor inverter of claim 5, wherein if the indication device indicates that two second dip switches are open, but two first dip switches are closed, then the motor is a brushed direct current motor; alternatively, the first and second electrodes may be,

if the indicating equipment indicates that the two second dial switches are turned on but the three first dial switches are turned off, the motor is a brushless direct current motor or a permanent magnet synchronous motor; alternatively, the first and second electrodes may be,

and if the indicating equipment indicates that the two second dial switches are turned on but the four first dial switches are turned off, the motor is a two-phase stepping motor.

8. A motor inverter as claimed in any one of claims 1 to 7, wherein the multiphase inverter bridge is a four-phase inverter bridge.

9. A motor controller, comprising: a motor inverter as claimed in any one of claims 1 to 8, wherein the output leads of the inverter bridge of the motor inverter are the output terminals of the motor controller.

10. A motor control system, comprising: a motor controller and a motor, wherein the motor controller is the motor controller of claim 9, and the output end of the motor controller is connected with the control end of the motor.

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