CN109600093B - Control system and control method - Google Patents
Control system and control method Download PDFInfo
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- CN109600093B CN109600093B CN201710912754.8A CN201710912754A CN109600093B CN 109600093 B CN109600093 B CN 109600093B CN 201710912754 A CN201710912754 A CN 201710912754A CN 109600093 B CN109600093 B CN 109600093B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
- H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
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Abstract
The invention relates to a control system and a control method, which can control a motor to operate in two working modes. The control system comprises a control circuit, wherein the control circuit comprises a processor, a driving circuit, an inverter circuit and a switch circuit; the motor comprises a stator assembly, wherein the stator assembly comprises windings, and the windings comprise a first winding and a second winding; in a first working mode, the first winding works, and the second winding does not work; in a second working mode, the first winding and the second winding are connected in parallel and work simultaneously; therefore, the use of electronic components can be reduced, and the cost is reduced.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of control, in particular to a control system and a control method for controlling a motor.
[ background of the invention ]
Generally, in order to meet the requirements of high and low speeds of a motor, two sets of windings, namely a high-speed winding and a low-speed winding, are designed for the motor, wherein the two sets of windings are independent of each other and work independently, and only one set of winding can work at the same time. Meanwhile, each set of winding needs to be provided with a set of driving circuit and a set of inverter circuit, which causes higher hardware cost.
[ summary of the invention ]
The invention provides a control system which is beneficial to reducing the hardware cost of a control circuit.
A control system capable of controlling the action of an electric machine, the electric machine comprising a stator assembly comprising windings, the windings comprising first windings and second windings; the working modes of the motor comprise a first working mode and a second working mode, the working speed of the motor is relatively divided into a low-speed area and a high-speed area, the low-speed area corresponds to the first working mode, and the high-speed area corresponds to the second working mode; the control system comprises a control circuit, wherein the control circuit comprises a processor, a driving circuit, an inverter circuit and a switch circuit; the inverter circuit is respectively connected with the first winding and the second winding, the switch circuit is arranged between the first winding and the second winding or arranged on a circuit where the second winding is located, and the switch circuit is used for realizing the parallel connection of the first winding and the second winding; in the first working mode, the first winding works, and the second winding does not work; in the second working mode, the first winding and the second winding are connected in parallel and work simultaneously; the processor controls the action of the switch circuit; the driving circuit drives the inverter circuit to act.
A control method that can be used to control a motor that can be used with an electric pump; the motor includes a stator assembly including windings including a first winding and a second winding; the control method is realized through a control system, and the control system comprises the control system; the control method comprises the following steps:
step S1, the processor controls the motor to enter the first mode or the second mode according to a control instruction or a feedback signal of the upper computer; if the motor is controlled to enter the first working mode, the step S12 and the step S13 are carried out; if the motor is controlled to enter the second working mode, the step S22 and the step S23 are carried out;
step S12, outputting control signals by three IO ports of a processor at the same time, and controlling the first change-over switch, the second change-over switch and the third change-over switch to be in off states;
step S13, the processor outputs a PWM signal to control the motor to act, the first winding works, the second winding does not work, and the motor works in a low-speed area;
step S22, outputting control signals by three IO ports of a processor at the same time, and controlling the first change-over switch, the second change-over switch and the third change-over switch to be in a conducting state;
and step S23, the processor outputs a PWM signal to control the motor to act, the first winding and the second winding are connected in parallel and work simultaneously, and the motor works in a high-speed area.
The control system can drive the motor to operate in two working modes. In a first working mode, the processor sends out a control signal, the first change-over switch, the second change-over switch and the third change-over switch are all in a disconnected state, the first winding works, the second winding does not work, and the motor works in a low-speed area; and in a second working mode, the processor sends out a control signal, the first change-over switch, the second change-over switch and the third change-over switch are all arranged in a conducting state, the first winding and the second winding are connected in parallel and work simultaneously, and the motor works in a high-speed area. The control system provided by the invention only needs one set of driving circuit, one set of inverter circuit and one set of switch circuit, thereby being beneficial to saving hardware cost.
Drawings
FIG. 1 is a schematic diagram of a connection of the control system provided by the present invention;
FIG. 2 is a schematic diagram of a first winding equivalent model of a first stator winding embodiment provided by the present invention;
FIG. 3 is a schematic diagram of a second winding equivalent model of a first stator winding embodiment provided by the present invention;
FIG. 4 is a schematic diagram of an equivalent model of a first stator winding embodiment in which a first winding and a second winding are connected in parallel;
FIG. 5 is a schematic diagram of an equivalent model of a first stator winding embodiment according to the present invention when the first winding and the second winding are operated in parallel;
FIG. 6 is a schematic diagram of a first winding equivalent model of a second stator winding embodiment provided by the present invention;
FIG. 7 is a schematic diagram of a second winding equivalent model of a second stator winding embodiment provided by the present invention;
FIG. 8 is a schematic diagram of an equivalent model of a second stator winding embodiment of the present invention with the first winding and the second winding connected in parallel;
fig. 9 is a schematic diagram of an equivalent model of a second stator winding provided by the invention when a first winding and a second winding are operated in parallel;
FIG. 10 is a schematic view of a first stator assembly provided by the present invention;
FIG. 11 is a schematic view of a second stator assembly provided by the present invention;
FIG. 12 is a schematic illustration of a control method provided by the present invention;
fig. 13 is a schematic diagram of an embodiment of the control method provided by the present invention.
Detailed Description
Technical features and advantages of embodiments of the present invention are described in detail below with reference to the accompanying drawings.
The invention provides a control system which comprises an upper computer 1, a control circuit 2 and a motor 3, wherein the control circuit 2 can be used for controlling the motor 3, the motor 3 comprises a stator component, the stator component comprises a winding, and the winding comprises a first winding 31 and a second winding 32. The operation mode of the motor includes a first operation mode in which the first winding 31 is operated and the second winding 32 is not operated; in the second operation mode, the first winding 31 and the second winding 32 are connected in parallel and operated simultaneously. Therefore, the working efficiency of the motor can be improved, and the application field of the motor can be widened.
Referring to fig. 1, in the present embodiment, the control circuit 2 includes a processor 21, a driving circuit 22, an inverter circuit 23, and a switching circuit 24; the driving circuit 22 is disposed between the processor 21 and the inverter circuit 23, the inverter circuit 23 is connected to the first winding 31 and the second winding 32, the switch circuit 24 is disposed between the first winding 31 and the second winding 32, or the switch circuit 24 is disposed on a circuit where the second winding 32 is located, and the switch circuit 24 can connect or disconnect the first winding 31 and the second winding 32. The working speed of the motor 3 is relatively divided into a low-speed area and a high-speed area, the working modes of the motor comprise a first working mode and a second working mode, the first working mode corresponds to the low-speed area of the working speed of the motor 3, and the second working mode corresponds to the high-speed area of the working speed of the motor 3. In a first working mode, the first winding 31 works, the second winding 32 does not work, the processor 21 is connected with the driving circuit 22, the inverter circuit 23 is connected with the driving circuit 22 and the first winding 31, the processor 21 controls the electrifying time sequence of the first winding 31, and at the moment, the motor 3 works in a low-speed area; in the second working mode, the first winding 31 and the second winding 32 are connected in parallel and work simultaneously, the switching circuit 24 realizes the parallel connection of the first winding 31 and the second winding 32 of the motor, the switching circuit 24 is controlled by the processor 21, the processor 21 is connected with the driving circuit 22, the inverter circuit 23 is connected with the driving circuit 22 and the first winding 31 and the second winding 32, the processor 21 controls the electrifying time sequence of the first winding 31 and the second winding 32, and the motor 3 works in a high-speed area; therefore, the control circuit only needs one set of driving circuit, one set of inverter circuit and one set of switch circuit to drive the first winding and the second winding so as to realize the control of the motors with different rotating speeds, thereby being beneficial to saving the hardware cost, and simultaneously, the corresponding working modes of the motors are applied under different rotating speeds so as to be beneficial to improving the working efficiency of the motors.
Referring to fig. 1 to 8, in this embodiment, the upper computer 1 communicates with the processor 21 through a LIN/CAN bus, the upper computer 1 is integrated with a vehicle control unit, the processor 21 receives a control instruction sent by the upper computer 1, the processor 21 outputs a PWM signal to the driving circuit 22 according to the received control instruction of the upper computer 1, and the driving circuit 22 drives the inverter circuit 23. Of course, the processor 21 may output the PWM signal to the driving circuit 22 according to its own requirement, so that the connection with the upper computer 1 is not required.
Referring to fig. 1 to 8, in the present embodiment, the electric machine 3 includes a stator assembly including windings including a first winding 31 and a second winding 32; the motor is a three-phase motor. The first winding 31 includes a first group of a-phase coils, a first group of B-phase coils, and a first group of C-phase coils, and the second winding 32 includes a second group of a-phase coils, a second group of B-phase coils, and a second group of C-phase coils.
Referring to fig. 1 to 8, in the present embodiment, the switching circuit 24 includes: a first change-over switch K1, a second change-over switch K2, and a third change-over switch K3. In the first working mode, the processor 21 sends out a control signal, the first switch K1, the second switch K2 and the third switch K3 are all simultaneously switched off, the first winding 31 works, the second winding 32 does not work, and the motor works in a low-speed area; in the second working mode, the processor 21 sends out a control signal, the first switch K1, the second switch K2 and the third switch K3 are all simultaneously placed in a conducting state, the first winding 31 and the second winding 32 are connected in parallel and work simultaneously, and the motor works in a high-speed area.
Referring to fig. 1 to 8, in the present embodiment, the first switch K1, the second switch K2, and the third switch K3 are MOSFETs (Metal-Oxide-Semiconductor Field Effect transistors). One end of a first winding 31 of the stator assembly is connected with the inverter circuit 23, the other end of the first winding 31 is connected with a common terminal 4, and the common terminal 4 is arranged between the first winding 31 and the switch circuit 24; the first group of phase-a coils of the first winding 31, the first group of phase-B coils of the first winding 31 and the first group of phase-C coils of the first winding 31 are all connected with a common terminal; the drain electrode of the first switch K1, the drain electrode of the second switch K2 and the drain electrode of the third switch K3 are all connected with the common terminal 4; the source of the first switch K1 is connected to the second group a-phase coil of the second winding 32, the source of the second switch K2 is connected to the second group B-phase coil of the second winding 32, and the source of the third switch K3 is connected to the second group C-phase coil of the second winding 32. The gates of the first switch K1, the second switch K2, and the third switch K3 are connected to three IO ports of the processor 21: the IO port IO _1 of the processor 21 is connected to the gate of the first switch K1, the IO port IO _2 of the processor 21 is connected to the gate of the second switch K2, and the IO port IO _3 of the processor 21 is connected to the gate of the third switch K3. The IO port IO _1 of the processor 21 outputs a high level to the gate of the first switch K1, the drain and the source of the first switch K1 are turned on, and the first switch K1 is turned on; the IO port IO _1 of the processor 21 outputs a low level to the gate of the first switch K1, the drain and the source of the first switch K1 are cut off, and the first switch K1 is turned off; similarly, the IO port IO _2 of the processor 21 outputs a high level to the gate of the second switch K2, the drain and the source of the second switch K1 are turned on, and the second switch K2 is turned on; the IO port IO _2 of the processor 21 outputs a low level to the gate of the second switch K2, the drain and the source of the second switch K2 are cut off, and the second switch K2 is turned off; similarly, the IO port IO _3 of the processor 21 outputs a high level to the gate of the third switch K3, the drain and the source of the third switch K3 are turned on, and the third switch K3 is turned on; the IO port IO _3 of the processor 21 outputs a low level to the gate of the third switch K3, the drain and the source of the third switch K3 are cut off, and the third switch K3 is turned off. Three IO ports of the processor 21 simultaneously output high levels, and the first switch K1, the second switch K2 and the third switch K3 are all simultaneously placed in a conducting state, so that the first winding and the second winding are connected in parallel and work simultaneously; similarly, the three IO ports of the processor 21 output low levels at the same time, the first switch K1, the second switch K2, and the third switch K3 are all placed in the off state at the same time, the first winding works, and the second winding does not work. The drains and sources of the first, second, and third switches K1, K2, and K3 may be interchanged.
Referring to fig. 1 to 8, in the present embodiment, each of the first switch K1, the second switch K2, and the third switch K3 includes other suitable semiconductor switching devices, including a triode, an IGBT (Insulated Gate Bipolar Transistor).
Referring to fig. 1 to 8, in the present embodiment, the inverter circuit 23 includes: a first power switch tube Q1, a second power switch tube Q2, a third power switch tube Q3, a fourth power switch tube Q4, a fifth power switch tube Q5 and a sixth power switch tube Q6; the 6 signal lines in the driving circuit 22 are respectively connected with the gates of the first power switch tube Q1, the second power switch tube Q2, the third power switch tube Q3, the fourth power switch tube Q4, the fifth power switch tube Q5 and the sixth power switch tube Q6; the drains of the first power switch tube Q1, the third power switch tube Q3 and the fifth power switch tube Q5 are respectively connected with the positive electrode of the direct-current power supply; the sources of the second power switch Q2, the fourth power switch Q4 and the sixth power switch Q6 are respectively connected to the negative electrode of the dc power supply. The source electrode of the first power switch tube Q1 is connected with the drain electrode of the second power switch tube Q2, and wires are led out between the source electrode of the first power switch tube Q1 and the drain electrode of the second power switch tube Q2 and are respectively connected to the first group of A-phase coils of the first winding 31 and the second group of A-phase coils of the second winding 32; the source electrode of the third power switch tube Q3 is connected with the drain electrode of the fourth power switch tube Q4, and wires are led out between the source electrode of the third power switch tube Q3 and the drain electrode of the fourth power switch tube Q4 and are respectively connected to the first group of B-phase coils of the first winding 31 and the second group of B-phase coils of the second winding 32; the source electrode of the fifth power switch tube Q5 is connected with the drain electrode of the sixth power switch tube Q6, and wires are led out between the source electrode of the fifth power switch tube Q5 and the drain electrode of the sixth power switch tube Q6 and are respectively connected to the first group of C-phase coils of the first winding 31 and the second group of C-phase coils of the second winding 32. The 6 paths of PWM signals output by the processor 21 are driven by the driving circuit 22, and then the output 6 paths of PWM signals are respectively transmitted to the gates of the first power switch Q1, the second power switch Q2, the third power switch Q3, the fourth power switch Q4, the fifth power switch Q5, and the sixth power switch Q6, and the PWM signals output by the processor 21 control the six power switches of the inverter circuit 23 to be turned on or off according to a certain timing sequence, for example, in the first mode, when the signals output by the processor 21 make the first power switch Q1 and the fourth power switch Q4 be turned on simultaneously and the other power switches are turned off, then the first group of phase-a coils and the first group of phase-B coils of the first winding 31 are applied with voltage. Similarly, the six power switching tubes of the inverter circuit 23 can be turned on or off at other timings.
In this embodiment, the first power switch Q1, the second power switch Q2, the third power switch Q3, the fourth power switch Q4, the fifth power switch Q5, and the sixth power switch Q6 each include other suitable semiconductor switching devices, such as a triode and an IGBT (Insulated Gate Bipolar Transistor).
Referring to fig. 1 to 8, in the present embodiment, the electric machine 3 includes a stator assembly including windings including a first winding 31 and a second winding 32; the motor 3 includes a three-phase motor. The first winding 31 includes a first group of a-phase coils, a first group of B-phase coils, and a first group of C-phase coils, and the second winding 32 includes a second group of a-phase coils, a second group of B-phase coils, and a second group of C-phase coils. In the first working mode, the processor 21 sends out a control signal, the first change-over switch K1, the second change-over switch K2 and the third change-over switch K3 are all simultaneously in an off state, and the first group of phase-a coils, the first group of phase-B coils and the first group of phase-C coils work; the second group of phase-A coils, the second group of phase-B coils and the second group of phase-C coils do not work, and the motor 3 works in a low-speed area; in the second working mode, the processor 21 sends out a control signal, the first switch K1, the second switch K2 and the third switch K3 are all simultaneously put in a conducting state, the first group of phase-a coils and the second group of phase-a coils are connected in parallel, the first group of phase-B coils and the second group of phase-B coils are connected in parallel, the first group of phase-C coils and the second group of phase-C coils are connected in parallel, and the motor 3 works in a high-speed area.
Referring to fig. 1 to 8, in the present embodiment, the first group of phase-a coils includes one coil or at least two identical coils connected in series; the first group of B-phase coils comprises one coil or at least two same coils which are connected in series; the first group of C-phase coils comprises one coil or at least two same coils which are connected in series; the second group of A-phase coils comprises one coil or at least two same coils connected in series; the second group of B-phase coils comprises one coil or at least two same coils connected in series; the second group of C-phase coils comprises one coil or at least two same coils connected in series; the first group of phase-A coils, the first group of phase-B coils, the first group of phase-C coils, the second group of phase-A coils, the second group of phase-B coils and the second group of phase-C coils are the same; therefore, the winding is convenient, and the first group of phase-A coils, the first group of phase-B coils, the first group of phase-C coils, the second group of phase-A coils, the second group of phase-B coils and the second group of phase-C coils can be selected according to the requirement of working performance, and the coil winding method is within the protection scope of the invention.
Fig. 2 to 5 show a first embodiment of a stator winding. Referring to fig. 2, fig. 2 is a schematic diagram of an equivalent model of the first winding of the stator winding provided in the present embodiment. In this embodiment, the first group of phase-a coils of the first winding includes coil 3111; the first set of B-phase coils of the first winding includes coil 3121; the first group of C-phase coils of the first winding includes a coil 3131; in the first operation mode, the processor 21 sends out a control signal, the first switch K1, the second switch K2 and the third switch K3 are all turned off at the same time, the first winding 31 operates, and the second winding 32 does not operate.
Referring to fig. 3, fig. 3 is a schematic diagram of an equivalent model of the second winding of the first embodiment of the stator winding provided in this embodiment. In this embodiment, the second group of phase-a coils of the second winding includes a coil 3211, the second group of phase-B coils of the second winding includes a coil 3221, and the second group of phase-C coils of the second winding includes a coil 3231.
Referring to fig. 4 and 5, fig. 4 is an equivalent model schematic diagram of the first winding and the second winding of the first embodiment of the stator winding provided in the present embodiment connected in parallel; coils 3111 in the first group of phase-a coils of the first winding and coils 3211 in the second group of phase-a coils of the second winding are connected in parallel by a first changeover switch K1; the coil 3121 in the first group of B-phase coils of the first winding and the coil 3221 in the second group of B-phase coils of the second winding are connected in parallel through a second changeover switch K2; the coil 3131 of the first group of C-phase coils of the first winding and the coil 3231 of the second group of C-phase coils of the second winding are connected in parallel through the third change-over switch K3. In the second operation mode, the processor 21 sends out a control signal, the first switch K1, the second switch K2 and the third switch K3 are all turned on at the same time, the first winding 31 and the second winding 32 are connected in parallel and operate at the same time, and fig. 5 is an equivalent model schematic diagram of the first winding and the second winding connected in parallel and operating at the same time.
Referring to fig. 2-5 and 10, fig. 10 is a schematic view of a first stator assembly provided in accordance with the present invention, corresponding to a first embodiment of the stator windings. The stator assembly includes a first stator tooth 301, a second stator tooth 302, a third stator tooth 303, a fourth stator tooth 304, a fifth stator tooth 305, and a sixth stator tooth 306. In this embodiment, the coils 3111 in the first group of phase-a coils of the first winding are wound on the first stator tooth 301; coils 3121 of the first group of B-phase coils of the first winding are wound on the third stator tooth 303; a coil 3131 of the first group C-phase coil of the first winding is wound on the fifth stator tooth 305; coils 3211 of a second group of phase-a coils of the second winding are wound on the second stator tooth 302; coils 3221 of the second group of B-phase coils of the first winding are wound on the fourth stator tooth portion 304; a coil 3231 of the second group C-phase coil of the first winding is wound on the sixth stator tooth 306.
Fig. 6 to 9 show a second embodiment of a stator winding. Referring to fig. 6, fig. 6 is a schematic diagram of an equivalent model of the first winding of the stator winding provided in the present embodiment. In this embodiment, the first group of phase-a coils of the first winding includes two identical coils, coil 3111 and coil 3112 being connected in series; the first group of B-phase coils of the first winding comprises two identical coils, namely a coil 3121 and a coil 3122, wherein the coil 3121 and the coil 3122 are connected in series; the first group of C-phase coils of the first winding includes two identical coils, the coil 3131 and the coil 3132 being connected in series; in the first operation mode, the processor 21 sends out a control signal, the first switch K1, the second switch K2 and the third switch K3 are all turned off at the same time, the first winding 31 operates, and the second winding 32 does not operate.
Referring to fig. 7, fig. 7 is a schematic diagram of an equivalent model of a second winding of a second embodiment of the stator winding provided in this embodiment. In this embodiment, the second group of phase a coils of the second winding includes two identical coils, i.e., a coil 3211 and a coil 3212, and a coil 3221 and a coil 3212 are connected in series; the second group of B-phase coils of the second winding comprises two identical coils, namely a coil 3221 and a coil 3222, wherein the coil 3221 and the coil 3222 are connected in series; the second set of C-phase coils of the second winding includes two identical coils, coil 3231 and coil 3232, with coil 3231 and coil 3232 connected in series.
Referring to fig. 8 and 9, fig. 8 is a schematic diagram of an equivalent model in which a first winding and a second winding of a second embodiment of a stator winding are connected in parallel according to the present embodiment; two coils connected in series in a first group of phase-A coils of the first winding, a coil 3111 and a coil 3112, and two coils connected in series in a second group of phase-A coils of the second winding, a coil 3211 and a coil 3212, are connected in parallel through a first switch K1; two coils in series connection in the first group of B-phase coils of the first winding, the coil 3121 and the coil 3122, and two coils in series connection in the second group of B-phase coils of the second winding, the coil 3221 and the coil 3222, are connected in parallel through a second switch K2; two coils connected in series in the first group of C-phase coils of the first winding, the coil 3131 and the coil 3132, and two coils connected in series in the second group of C-phase coils of the second winding, the coil 3231 and the coil 3232, are connected in parallel by a third switch K3. In the second operation mode, the processor 21 sends out a control signal, the first switch K1, the second switch K2 and the third switch K3 are all turned on at the same time, the first winding 31 and the second winding 32 are connected in parallel and operate at the same time, and fig. 9 is an equivalent model schematic diagram of the first winding and the second winding connected in parallel and operating at the same time.
Referring to fig. 6-9 and 11, fig. 11 is a schematic view of a second stator assembly provided by the present invention, corresponding to a second embodiment of the stator windings. The stator assembly includes a first stator tooth 301, a second stator tooth 302, a third stator tooth 303, a fourth stator tooth 304, a fifth stator tooth 305, and a sixth stator tooth 306. The first stator teeth 301 include a first region 3011 and a second region 3012; the second stator tooth 302 includes a first region 3021 and a second region 3022; the third stator tooth 303 includes a first region 3031 and a second region 3032; fourth stator tooth 304 includes a first region 3041 and a second region 3042; the fifth stator tooth 305 includes a first region 3051 and a second region 3052; sixth stator tooth 306 includes a first region 3061 and a second region 3062.
Referring to fig. 6 to 9 and 11, in the present embodiment, coils 3111 of a first group of phase-a coils of the first winding are wound on the first region 3011 of the first stator tooth 301, and coils 3211 of a second group of phase-a coils of the second winding are wound on the second region 3012 of the first stator tooth 301; a coil 3112 of the first group of phase-a coils of the first winding is wound on the first region 3041 of the fourth stator tooth 304, and a coil 3212 of the second group of phase-a coils of the second winding is wound on the second region 3042 of the fourth stator tooth 304; coils 3121 of a first group of B-phase coils of the first winding are wound on the first region 3021 of the second stator tooth 302, and coils 3221 of a second group of B-phase coils of the second winding are wound on the second region 3022 of the second stator tooth 302; a coil 3122 of the first group of B-phase coils of the first winding is wound on the first region 3051 of the fifth stator tooth 305, and a coil 3222 of the second group of B-phase coils of the second winding is wound on the second region 3052 of the fifth stator tooth 305; a coil 3131 of the first group of C-phase coils of the first winding is wound on the first region 3031 of the third stator tooth 303, and a coil 3231 of the second group of C-phase coils of the second winding is wound on the second region 3032 of the third stator tooth 303; a coil 3132 of the first group of C-phase coils of the first winding is wound on the first region 3061 of the sixth stator tooth 306, and a coil 3232 of the second group of C-phase coils of the second winding is wound on the second region 3062 of the sixth stator tooth 306.
The invention also provides a control method, which can be used for controlling the motor, and the motor can be used for the electric pump; referring to fig. 1, the electric machine 3 comprises a stator assembly comprising windings comprising a first winding 31 and a second winding 32; the control method is realized by a control system, wherein the control system comprises an upper computer 1 and a control circuit 2, and the control circuit comprises a processor 21, a drive circuit 22, an inverter circuit 23 and a switch circuit 24; the working modes of the motor 3 include a first working mode and a second working mode, and the working speed of the motor 3 is relatively divided into a low-speed area and a high-speed area, wherein the low-speed area corresponds to the first working mode, and the high-speed area corresponds to the second working mode. The control system comprises a control circuit 2, wherein the control circuit 2 comprises a processor 21, a driving circuit 22, an inverter circuit 23 and a switching circuit 24; the inverter circuit is respectively connected with the first winding 31 and the second winding 32, the switch circuit 24 is arranged between the first winding 31 and the second winding 32, and the switch circuit 24 is used for realizing the parallel connection of the first winding 31 and the second winding 32; in the first operation mode, the first winding 31 is operated, and the second winding 32 is not operated; in the second operation mode, the first winding 31 and the second winding 32 are connected in parallel and operate simultaneously; the processor 21 controls the operation of the switching circuit 24; the driving circuit 22 drives the inverter circuit 23 to operate. Referring to fig. 1 and 12, the control method includes the steps of:
step S1, the processor 21 controls the motor 3 to enter a first working mode or a second working mode according to a control instruction or a feedback signal of the upper computer 1; if the motor is controlled to enter the first working mode, the step S12 and the step S13 are carried out; if the motor is controlled to enter the second working mode, the step S22 and the step S23 are carried out;
step S12, the three IO ports of the processor 21, i.e., IO port IO _1, IO port IO _2, and IO port IO _3, output control signals at the same time, and control the first switch K1, the second switch K2, and the third switch K3 to be turned off;
step S13, the processor 21 outputs a PWM signal to control the motor 3 to act, the first winding 31 works, the second winding 32 does not work, and the motor 3 works in a low-speed area;
step S22, the three IO ports of the processor 21, i.e., IO port IO _1, IO port IO _2, and IO port IO _3, output control signals at the same time, and control the first switch K1, the second switch K2, and the third switch K3 to be in a conducting state;
step S23, the processor 21 outputs a PWM signal to control the motor 3 to operate, the first winding 31 and the second winding 32 are connected in parallel and operate simultaneously, and the motor 3 operates in a high-speed region.
In step S1, the upper computer 1 sends a control instruction to the processor 21 according to a system signal, where the system signal includes a temperature of the automobile engine, a rotation speed of the electric pump, and a medium temperature of the electric pump; in step S1, the feedback signal includes the rotation speed of the motor and the current of the inverter circuit.
Referring to fig. 1 and 13, fig. 13 is a schematic diagram of an embodiment of a control method provided by the present invention, where the embodiment includes the following steps:
step a1, the upper computer 1 determines that the initial state of the motor 3 works in the first working mode or the second working mode according to the engine temperature, and then sends a control instruction to the processor 21, and the processor 21 controls the initial state of the motor 3 to work in the first working mode or the second working mode.
Step a2, the processor 21 determines that the motor 3 is currently operating in the first operating mode or the second operating mode. If the motor 3 is currently operated in the first operation mode, entering step A11; if the motor 3 is currently operating in the second operating mode, step a21 is entered. Step A11 and step A21 are in a parallel relationship, and step A2 proceeds to step A11 or step A21.
Step a11, the motor 3 is currently operating in the first operating mode.
Step a12, the processor 21 controls the motor 3 to enter the same working mode as the current working mode of the motor 3 according to the received control instruction of the upper computer 1: if yes, go to step A121; if the determination is negative, the process proceeds to step A122. Step a121 and step a122 belong to a parallel relationship, and step a12 proceeds to step a121 or step a 122.
And step A121, the processor 21 controls the motor 3 to enter a first working mode according to a control instruction of the upper computer 1.
Step A122, the processor 21 controls the motor 3 to enter a second working mode according to the control instruction of the upper computer 1
Step a21, the motor 3 is currently operating in the second operating mode.
Step a22, the processor 21 controls the motor 3 to enter the same working mode as the current working mode of the motor 3 according to the received control instruction of the upper computer 1: if yes, go to step A221; if the determination is negative, the process proceeds to step A222. Step a221 and step a222 belong to a parallel relationship, and step a22 proceeds to step a221 or step a 222.
And step A221, the processor 21 controls the motor 3 to enter a second working mode according to a control instruction of the upper computer 1.
Step A222, the processor 21 controls the motor 3 to enter a first working mode according to a control instruction of the upper computer 1.
It should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted, and all technical solutions and modifications which do not depart from the spirit and scope of the present invention are intended to be covered by the claims of the present invention.
Claims (10)
1. A control system capable of controlling the action of an electric machine, the electric machine comprising a stator assembly comprising windings, the windings comprising first windings and second windings; the working modes of the motor comprise a first working mode and a second working mode, the working speed of the motor is relatively divided into a low-speed area and a high-speed area, the low-speed area corresponds to the first working mode, and the high-speed area corresponds to the second working mode; the inverter circuit is respectively connected with the first winding and the second winding; the switch circuit is arranged between the first winding and the second winding or on a circuit where the second winding is located, and the switch circuit is used for realizing the parallel connection of the first winding and the second winding; in the first working mode, the first winding works, and the second winding does not work; in the second working mode, the first winding and the second winding are connected in parallel and work simultaneously; the processor controls the action of the switch circuit; the driving circuit drives the inverter circuit to act; the motor is a three-phase motor, the first winding comprises a first group of A-phase coils, a first group of B-phase coils and a first group of C-phase coils, and the second winding comprises a second group of A-phase coils, a second group of B-phase coils and a second group of C-phase coils; the switching circuit includes: a first change-over switch, a second change-over switch and a third change-over switch; in the first working mode, the processor sends out a control signal, the first change-over switch, the second change-over switch and the third change-over switch are all in an off state, the first group of A-phase coils, the first group of B-phase coils and the first group of C-phase coils work, the second group of A-phase coils, the second group of B-phase coils and the second group of C-phase coils do not work, and the motor works in a low-speed area; in the second working mode, the processor sends out a control signal, the first change-over switch, the second change-over switch and the third change-over switch are all in a conducting state, the first group of phase-A coils is connected with the second group of phase-A coils in parallel, the first group of phase-B coils is connected with the second group of phase-B coils in parallel, the first group of phase-C coils is connected with the second group of phase-C coils in parallel, and the motor works in a high-speed area.
2. The control system of claim 1, wherein: the control system further comprises an upper computer, the upper computer is integrated in the vehicle control unit and is communicated with the processor through a LIN/CAN bus, and the processor receives a control instruction sent by the upper computer; and the processor outputs a PWM signal to the driving circuit according to the control instruction.
3. The control system of claim 1 or 2, wherein the first set of phase a coils comprises one coil or at least two identical coils connected in series, the first set of phase B coils comprises one coil or at least two identical coils connected in series, and the first set of phase C coils comprises one coil or at least two identical coils connected in series; the second group of A-phase coils comprises one coil or at least two identical coils connected in series, the second group of B-phase coils comprises one coil or at least two identical coils connected in series, the second group of C-phase coils comprises one coil or at least two identical coils connected in series, and the first group of A-phase coils, the first group of B-phase coils, the first group of C-phase coils and the second group of A-phase coils, the second group of B-phase coils and the second group of C-phase coils are identical.
4. The control system according to claim 3, wherein one end of the first winding is connected to the inverter circuit, and the other end of the first winding is connected to a common terminal provided between the first winding and the switch circuit; the first group of A-phase coils, the first group of B-phase coils and the first group of C-phase coils are all connected with the common end, and the first change-over switch, the second change-over switch and the third change-over switch are all connected with the common end.
5. The control system according to claim 3, wherein the first switch, the second switch and the third switch are MOSFETs, and gates of the first switch, the second switch and the third switch are respectively connected to three IO ports of a processor; the inverter circuit includes: the power supply comprises a first power switch tube, a second power switch tube, a third power switch tube, a fourth power switch tube, a fifth power switch tube and a sixth power switch tube; the first power switch tube, the second power switch tube, the third power switch tube, the fourth power switch tube, the fifth power switch tube and the sixth power switch tube are all MOSFETs, and the grids of the first power switch tube, the second power switch tube, the third power switch tube, the fourth power switch tube, the fifth power switch tube and the sixth power switch tube are respectively connected with the driving circuit.
6. The control system according to claim 4, wherein the first switch, the second switch and the third switch are MOSFETs, and gates of the first switch, the second switch and the third switch are respectively connected to three IO ports of a processor; the inverter circuit includes: the power supply comprises a first power switch tube, a second power switch tube, a third power switch tube, a fourth power switch tube, a fifth power switch tube and a sixth power switch tube; the first power switch tube, the second power switch tube, the third power switch tube, the fourth power switch tube, the fifth power switch tube and the sixth power switch tube are all MOSFETs, and the grids of the first power switch tube, the second power switch tube, the third power switch tube, the fourth power switch tube, the fifth power switch tube and the sixth power switch tube are respectively connected with the driving circuit.
7. The control system of claim 5 or 6, wherein the first switch, the second switch, and the third switch comprise semiconductor switching devices, and the first power switch tube, the second power switch tube, the third power switch tube, the fourth power switch tube, the fifth power switch tube, and the sixth power switch tube comprise semiconductor switching devices; the semiconductor switching device comprises a triode and an IGBT.
8. A control method that can be used to control a motor that can be used with an electric pump; the motor includes a stator assembly including windings including a first winding and a second winding; the control method is implemented by a control system comprising the control system of claim 1 or 5 or 6; the control method comprises the following steps:
step S1, the processor controls the motor to enter the first mode or the second mode according to a control instruction or a feedback signal of the upper computer; if the motor is controlled to enter the first working mode, the step S12 and the step S13 are carried out; if the motor is controlled to enter the second working mode, the step S22 and the step S23 are carried out;
step S12, outputting control signals by three IO ports of a processor at the same time, and controlling the first change-over switch, the second change-over switch and the third change-over switch to be in off states;
step S13, the processor outputs a PWM signal to control the motor to act, the first winding works, the second winding does not work, and the motor works in a low-speed area;
step S22, outputting control signals by three IO ports of a processor at the same time, and controlling the first change-over switch, the second change-over switch and the third change-over switch to be in a conducting state;
and step S23, the processor outputs a PWM signal to control the motor to act, the first winding and the second winding are connected in parallel and work simultaneously, and the motor works in a high-speed area.
9. The control method according to claim 8, wherein in step S1, the upper computer sends a control command to the processor according to a system signal, and the system signal includes a temperature of an automobile engine, a rotation speed of the electric pump, and a medium temperature of the electric pump.
10. The control method according to claim 9, wherein in the step S1, the feedback signal includes a rotation speed of the motor and a current of an inverter circuit.
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| CN201710912754.8A CN109600093B (en) | 2017-09-30 | 2017-09-30 | Control system and control method |
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| CN101982924A (en) * | 2010-10-27 | 2011-03-02 | 徐志瑶 | Design method for variable-frequency driven double-rated frequency three-phase motor |
| CN102412780A (en) * | 2010-09-20 | 2012-04-11 | 雷米技术有限公司 | Electric machine system including an electric machine having switched stator windings |
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| JP2013219891A (en) * | 2012-04-06 | 2013-10-24 | Ihi Infrastructure Systems Co Ltd | Motor control device |
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| CN102412780A (en) * | 2010-09-20 | 2012-04-11 | 雷米技术有限公司 | Electric machine system including an electric machine having switched stator windings |
| CN101982924A (en) * | 2010-10-27 | 2011-03-02 | 徐志瑶 | Design method for variable-frequency driven double-rated frequency three-phase motor |
| CN102611268A (en) * | 2011-01-20 | 2012-07-25 | 付强 | Double-speed brushless automobile motor |
| JP2013219891A (en) * | 2012-04-06 | 2013-10-24 | Ihi Infrastructure Systems Co Ltd | Motor control device |
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