CN117767840A - Device system based on double closed-loop regulation and control five-phase induction motor - Google Patents
Device system based on double closed-loop regulation and control five-phase induction motor Download PDFInfo
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- CN117767840A CN117767840A CN202311716022.3A CN202311716022A CN117767840A CN 117767840 A CN117767840 A CN 117767840A CN 202311716022 A CN202311716022 A CN 202311716022A CN 117767840 A CN117767840 A CN 117767840A
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Abstract
The invention provides a device system based on a double closed-loop regulation and control five-phase induction motor, and relates to the technical field of fault-tolerant regulation and control of five-phase motors. The invention comprises a double closed-loop regulation and control system and a double closed-loop regulation and control device, which consists of a PID voltage stabilization and current stabilizing module, a current sensor, a voltage sensor, a signal acquisition circuit, a processor, a controller, a five-phase frequency converter, a control unit, a main circuit and an early warning display device, wherein the current sensor and the voltage sensor are arranged on end windings of a five-phase motor, the output ends of the two sensors are connected with the signal acquisition circuit, the signal acquisition circuit is connected with the processor, the processor is respectively connected with the five-phase frequency converter, the controller and the early warning display device, the input end of the five-phase frequency converter is connected with a 380V power grid and a 200V power supply, the output end of the five-phase frequency converter is connected with a PID module 1, the PID module 1 is connected with the input end of the controller, the output end of the controller is respectively connected with a PID module 2 and the control unit, the output ends of the PID module 2 and the control unit are connected with the main circuit, the main circuit is connected with stator windings of the five-phase motor, and the output ends of the five-phase motor windings are connected with a PID module 3; the invention can realize three winding loops of star connection, angle connection and five-pointed star connection, and can realize intelligent regulation and control under abnormal faults so as to ensure the stable operation of the five-phase motor.
Description
Technical field:
the invention relates to the technical field of motor regulation and control, in particular to a device system based on a double closed-loop regulation and control five-phase induction motor.
The background technology is as follows:
the five-phase motor is one of common motors in the market, has the advantages of small torque fluctuation, high efficiency, good fault tolerance performance and the like, and can be widely applied in various fields, so that the five-phase motor is valued by people. The five-phase motor not only increases the number of motor phases on the basis of the traditional three-phase motor, but also has a driving system more complicated than that of the traditional three-phase motor, so that the practical application of the five-phase motor to the electric automobile has a plurality of problems to be solved, and the five-phase motor is also a future development trend of the five-phase motor technology. At present, aiming at the main research of a five-phase motor, fault-tolerant control occupies an important position, and main technical requirements of the fault-tolerant control comprise performances of larger electromagnetic torque output, smaller torque pulsation and the like, and in order to improve the reliability of a five-phase motor driving system in practical application, the fault-tolerant strategy of the five-phase motor driving system during phase failure must be solved so as to ensure that the motor driving system has stronger disturbance rejection capability.
The current driving regulation and control system of the five-phase motor generally comprises a power supply part, a PID module, a frequency converter and other structures, the open-loop driving system can cause overlarge starting current, and the voltages and the currents of the phases corresponding to the connection of different windings are different; once the five-phase motor fails, the energy loss and the phase current are too large, so that a user cannot perceive the energy loss and the phase current at the first time, and the stable adjustment on the five-phase motor during working is lacking, and the system and the device for regulating and controlling the five-phase motor based on the double closed loops are influenced.
The invention comprises the following steps:
the invention aims at: in order to overcome the problems in the prior art, a five-phase motor based dual closed-loop regulation and control system and device are provided.
The technical scheme adopted by the invention for solving the problems is as follows: a five-phase motor based on double closed-loop regulation and control system and device consists of a PID voltage stabilization and current stabilization module, a current sensor, a voltage sensor, a signal acquisition circuit, a processor, a controller, a five-phase frequency converter, a control unit, a main circuit and an early warning display device;
the PID voltage and current stabilizing module consists of a PID module 1, a PID module 2 and a PID module 3;
the PID module 1 consists of a follower circuit, a primary amplifying circuit, a primary filtering circuit, a secondary amplifying circuit, a secondary filtering circuit, a PID circuit and the follower circuit, wherein the input end of the PID module is connected with five output branches of the five-phase frequency converter, and the output end of the PID module is connected with the controller;
the input end of the five-phase frequency converter is connected with a 380V power grid and a 200V power supply;
the signal input end of the controller is further connected with the processor, the judging signal of whether the winding is faulty or not transmitted by the processor is received, and the signal output end of the controller is connected with the control unit and the PID module 2;
the control unit performs execution of the output specification of the controller, and the output end is connected with the main circuit;
the PID module 2 consists of a follower circuit, an automatic gain adjusting circuit, a band-pass filter, a PID circuit and the follower circuit, and is used for carrying out accurate transmission of an output instruction of the controller, and an output end of the PID module is connected with the main circuit;
the main circuit consists of a single-winding change-over switch, the output end of the main circuit is connected with five branches of a five-phase motor stator winding, and the winding change-over switch realizes the switching of three winding loops of star connection, angle connection and five-pointed star;
the PID module 3 is composed of a following circuit, an automatic gain adjusting circuit, a full wave detection circuit, a band-pass filter circuit, a PID circuit and a following circuit, wherein the signal input end of the PID module is connected with five branches of a five-phase motor stator winding, and the output end of the PID module is respectively connected with a current sensor and a voltage sensor;
the current sensor and the voltage sensor are arranged on the end winding of the five-phase motor, and the signal output end is connected with the signal acquisition circuit;
the signal acquisition circuit is connected with the processor; further, the processor consists of a micro processor STM32, wherein an electric signal transmission, AD conversion and information analysis processing chip is integrated on the micro processor STM32, and a signal output end is respectively connected with the controller and the early warning display device;
the early warning display device comprises a display screen and a buzzer.
The beneficial effects of the invention are as follows: the electric signal in the stator winding in the running process of the five-phase asynchronous motor can be detected, whether the five-phase asynchronous motor fails or not is judged, early warning and displaying are carried out, and meanwhile, the double closed-loop regulation and control system is adopted for regulation, so that the five-phase motor works under the optimal condition.
Description of the drawings:
FIG. 1 is a block diagram of a dual closed loop regulation system and apparatus;
FIG. 2 is a diagram showing the construction of the PID module 1;
FIG. 3 is a circuit diagram of the PID module 1;
FIG. 4 is a diagram showing the construction of the PID module 2;
FIG. 5 is a circuit diagram of the PID module 2;
FIG. 6 is a diagram showing the construction of the PID module 3;
FIG. 7 is a circuit diagram of the PID module 3;
FIG. 8 is a circuit diagram of a single winding switcher of a five-phase motor;
FIG. 9 is a circuit diagram of a control loop;
FIG. 10 is a pentagonal winding of a five-phase motor;
FIG. 11 is a five-phase motor five-star winding;
fig. 12 is a flow chart of fault tolerant switching of a five phase motor.
Explanation of the drawings: r: a resistor; c: a capacitor; VD: a diode; v: a voltage signal input terminal; QS: a five-phase air switch; FU1: a five-phase thermal fuse; FU2: a two-phase thermal fuse; FR1, FR2: five-phase thermal relay; KM1, KM2, KM3, KM4: five-phase alternating current contactor coil, main contacts, and auxiliary contacts (specifically five-open-close, five-open-close, and labeled in fig. 2); KT: a time relay coil, a main contact; SB1 (stop button), SB2 (start button), SB3: a push button switch.
The specific embodiment is as follows:
in order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, fig. 9, fig. 10, fig. 11 and fig. 12, the five-phase motor provided by the invention is based on a double closed loop regulation and control system and device, and consists of a PID voltage stabilizing and stabilizing module, a current sensor, a voltage sensor, a signal acquisition circuit, a processor, a controller, a five-phase frequency converter, a control unit, a main loop and an alarm device, wherein the current sensor and the voltage sensor are arranged at the end winding of the five-phase motor, when the five-phase asynchronous motor operates, an electric signal in a stator winding is converted into a small signal through the PID module 3 and is acquired by the current sensor and the voltage sensor, and is transmitted to a processor through a signal detection circuit to judge whether the motor fails, and if the motor fails, the processor outputs a regulation and control instruction to the five-phase frequency converter, the controller and the early warning display device, the five-phase frequency converter is respectively connected with a 220V power supply, a 380V power grid and a PID module 1, the PID module 1 is connected with a controller, the output end of the controller is respectively connected with a PID module 2 and a control unit, after the controller obtains a regulation and control instruction, the main circuit is regulated and controlled by the control unit, the main circuit is connected with a single-winding switch circuit, the single-winding switch circuit is connected with three winding loops of a star connection, a corner connection and a five-star connection, different windings are switched through the turn-off of a winding switch, and meanwhile, electric signals in stator windings of the five-phase asynchronous motor are collected in real time, and then fed back to the five-phase frequency converter to regulate the input current and the voltage of the five-phase motor, and the early warning display device is connected with a display screen and a buzzer to realize real-time display and sound early warning of the electric signals.
As shown in fig. 1, the signal acquisition circuit acquires the electric signal in the stator winding of the five-phase asynchronous motor, transmits the electric signal to the processor to perform fault real-time discrimination, one branch is designated by the output of the controller, the winding change-over switch in the main circuit is turned off to realize winding change-over, and the other branch is changed to realize double closed loop regulation and control by changing the output electric signal of the five-phase frequency converter.
In addition, the power supply of the five-phase frequency converter is completed by a 220V alternating current power supply through a voltage regulator, and the excitation source required by the five-phase motor is completed by a 380V power grid through the voltage regulator.
As shown in fig. 2 and 3, the voltage signals output by five branches of the frequency converter of the five-phase motor enter the follower circuit to perform primary voltage stabilizing transmission, the voltage signals are amplified by the primary inverting amplifier, and the voltage signals are filtered by the primary filterNoise reduction, secondary amplification of the voltage signal is carried out through a secondary inverting amplifier, secondary filtering is carried out through a secondary filter, higher harmonics in the output voltage signal of the frequency converter can be filtered, finally voltage signal waveform adjustment is carried out through a PID circuit and a follower circuit, the voltage signal is accurately transmitted to the controller, and the influence on instruction transmission of the controller due to the higher harmonics existing in the output waveform of the frequency converter is avoided. Wherein the following circuit is defined by R 1 At the normal phase input end R 2 、R 3 At the inverting input and operational amplifier N 1 Composition; first-stage amplifying circuit route R 4 And R is 5 At the inverting input terminal, R 6 At the non-inverting input and operational amplifier N 1 Composition; primary filter circuit route C 1 、C 2 、R 7 And R is 8 At the positive input end, R 9 And R is 10 At the inverting input and operational amplifier N 1 Composition; two-stage amplifying circuit route R 11 And R is 13 At the inverting input terminal, R 12 At the non-inverting input and operational amplifier N 1 Composition; second-stage filter circuit route C 3 、C 4 、R 14 And R is 15 At the positive input end, R 16 And R is 17 At the inverting input and operational amplifier N 1 Composition; PID circuitry is defined by R 18 And R is 25 At the inverting input terminal, R 19 At the positive input end, R 27 Slide rheostat R 28 、R 29 At the output end and operational amplifier N 1 And from R 20 And C 5 At the inverting input terminal, R 21 At the positive input end, R 30 At the output end and operational amplifier N 2 And from R 22 And R is 26 At the inverting input terminal, R 23 And R is 24 At the positive input end, R 31 、R 32 At the output end and operational amplifier N 3 C 6 At the inverting input and operational amplifier N 4 Four parts; follower circuit route R 33 At the normal phase input end R 34 At the inverting input and operational amplifier N 1 Composition is prepared.
As shown in fig. 4 and 5, the voltage signals in five branches output by the controller are subjected to primary voltage stabilizing transmission through the follower circuit, amplified and adjusted through the automatic gain adjusting circuit, removed by the band-pass filter circuit, subjected to high-order and low-order harmonic signals, subjected to voltage signal waveform adjustment through the PID circuit, and finally transferred to the main circuit through the voltage stabilizing process of the follower circuit. Wherein the following circuit is defined by R 35 At the normal phase input end R 35 、R 36 At the inverting input and operational amplifier N 1 Composition; automatic gain adjustment circuit route R 38 、R 39 、R 41 、R 42 、R 43 And diode VD 1 Control signal input source V 1 At the inverting input terminal, R 40 At the non-inverting input and operational amplifier N 1 Composition; the band-pass filter is composed of C 7 、C 8 、C 9 、R 44 、R 45 And R 46 At the positive input end, R 47 And R is 48 At the inverting input and operational amplifier N 1 Composition; PID circuitry is defined by R 49 And R is 50 At the inverting input terminal, R 51 At the positive input end, R 58 Slide rheostat R 59 、R 60 At the output end and operational amplifier N 1 And from R 52 And C 10 At the inverting input terminal, R 53 At the positive input end, R 61 At the output end and operational amplifier N 2 And from R 54 And R is 57 At the inverting input terminal, R 55 And R is 56 At the positive input end, R 62 、R 63 At the output end and operational amplifier N 3 C 11 At the inverting input and operational amplifier N 4 Four parts; follower circuit route R 66 At the normal phase input end R 67 And R is 68 At the inverting input and operational amplifier N 1 Composition is prepared.
As shown in fig. 6 and 7, the stator winding of the five-phase motor outputs voltage and current signals of five branches, and the signals are subjected to primary voltage stabilization and current stabilization transmission by a follower circuit and automatic gain adjustmentThe circuit performs voltage waveform signal amplification adjustment, performs waveform selection and detection through a full-wave detection circuit, removes high-order and low-order harmonic signals through a band-pass filter circuit, performs voltage signal waveform adjustment through a PID circuit, and finally transmits the voltage signal waveform adjustment to a current and voltage sensor through a following circuit voltage stabilizing process. Wherein the following circuit is defined by R 69 At the normal phase input end R 70 、R 71 At the inverting input and operational amplifier N 1 Composition; automatic gain adjustment circuit route R 72 、R 74 、R 75 、R 76 、R 77 And diode VD 2 Control signal input source V 2 At the inverting input terminal, R 73 At the non-inverting input and operational amplifier N 1 Composition; full wave detection circuit R 78 、R 79 And VD 3 At the inverting input terminal, R 80 Is positioned at the normal phase input end and VD 4 At the output end and operational amplifier N 1 R is R 81 、VD 3 At the inverting input terminal, R 82 Is positioned at the normal phase input end and VD 6 At the output end and operational amplifier N 2 Composition is prepared. The band-pass filter is composed of C 12 、C 13 、C 14 、R 83 、R 84 And R 85 At the positive input end, R 86 And R is 87 At the inverting input and operational amplifier N 1 Composition; PID circuitry is defined by R 88 And R is 89 At the inverting input terminal, R 91 At the positive input end, R 90 Slide rheostat R 97 、R 98 At the output end and operational amplifier N 1 And from R 92 And C 15 At the inverting input terminal, R 93 At the positive input end, R 99 At the output end and operational amplifier N 2 And from R 94 And R is 100 At the inverting input terminal, R 95 And R is 96 At the positive input end, R 101 、R 102 At the output end and operational amplifier N 3 C 11 At the inverting input and operational amplifier N 4 Four parts; follower circuit route R 105 At the normal phase input end R 106 And R is 107 At the inverting input and operational amplifier N 1 Composition is prepared.
As shown in fig. 8 and 9, the single-winding switching circuit of the five-phase motor is composed of an air switch and a five-phase alternating-current contactor, the air switch is connected with a time relay, the five-phase alternating-current contactor realizes a step-down starting process by controlling a main loop, when the five-phase motor fails, an air switch QS is closed, a starting button SB2 is started, a coil of a time relay KT is electrified, the KT contactor is attracted, a set delay time is 10 seconds, a coil KM3 is electrified, a main contact of KM3 is attracted, an auxiliary contact of KM3 is normally closed and normally closed, a coil KM1 is electrified at the moment, the main contact of KM1 is attracted, the auxiliary contact is attracted, the coil is kept continuously electrified, and the process is maintained within a set 10S of the time relay, so that star-shaped winding connection of the five-phase motor is realized; after 10S, the KT is disconnected, the KM3 coil is disconnected, the KM3 main contact is disconnected, the auxiliary contact is recovered to be normally open and normally closed, the KM2 coil is electrified, the KM2 main contact is attracted, the auxiliary contact is disconnected, and the pentagonal winding connection of the five-phase motor is realized; and a starting button SB3, a coil KM4 is electrified, a main contact of KM4 is closed, an auxiliary contact is opened, a voltage-reducing starting circuit is opened, and five-phase motor five-pointed star winding connection is formed. When the five-phase motor fails, the pentagonal winding has more excellent performance, and therefore, the fault tolerance mechanism described in the patent is that when the fault occurs, the star connection or the five-pointed star connection of the winding of the five-phase motor is switched to the pentagonal winding.
The design adopts a signal acquisition circuit, uses a voltage transformer to perform voltage conversion work, and acquires converted signal voltage through a certain circuit; the current transformer is used for current conversion, and converted current signals are collected through a certain circuit.
As shown in fig. 10, 11 and 12, which are flowcharts of fault-tolerant switching of pentagonal windings, five-pointed star windings and windings, the current directions in the windings are shown in the figures, the head ends of the windings are a1, b1, c1, d1 and e1, and the tail ends of the windings are a2, b2, c2, d2 and e2.
Claims (6)
1. Device system based on five looks induction motor of two closed-loop regulation and control, its characterized in that includes: the system comprises a PID voltage stabilization and current stabilization module, a current sensor, a voltage sensor, a signal acquisition circuit, a processor, a controller, a five-phase frequency converter, a control unit, a main circuit and an early warning display device; the current sensor and the voltage sensor are arranged on end windings of the five-phase motor, the output ends of the two sensors are connected with a signal acquisition circuit, the signal detection circuit is connected with a processor, the processor is respectively connected with a five-phase frequency converter, a controller and a display device, the input end of the five-phase frequency converter is connected with a 380V power grid and a 200V power supply, the output end of the five-phase frequency converter is connected with a PID module 1, the PID module 1 is connected with the output end of the controller, the output end of the controller is respectively connected with a PID module 2 and a control unit, the output ends of the PID module 2 and the control unit are both connected with a main circuit, the main circuit is connected with a five-phase motor stator winding, and the output end of the five-phase motor winding is connected with a PID module 3.
2. The five-phase motor based double closed-loop regulation and control system and device according to claim 1, wherein a processor is designed in the double closed-loop regulation and control system and device, and is connected with an early warning display device for receiving and analyzing electric signals in a stator winding of the five-phase motor in real time.
3. The device system based on the double closed-loop regulation five-phase induction motor according to claim 1, wherein the PID module 1 is composed of a follower circuit, a primary amplification, a primary filtering, a secondary amplification, a secondary filtering, a PID circuit and the follower circuit, and performs a noise reduction process of an electric signal output by the frequency converter.
4. The device system based on the double closed-loop regulation five-phase induction motor according to claim 1, wherein the PID module 2 is composed of a follower circuit, an automatic gain adjustment circuit, a band-pass filter, a PID circuit and the follower circuit, and the real-time accurate transmission of the electric signals between the controller and the main circuit is realized.
5. The device system based on the double closed-loop regulation and control five-phase induction motor according to claim 1, wherein the PID module 3 consists of a follower circuit, an automatic gain adjustment circuit, a full-wave detection circuit, a band-pass filter, a PID circuit and the follower circuit, and is used for filtering and detecting electric signals between a stator winding and a current and voltage sensor, and transmitting waveform changes of the electric signals in a real-time winding in real time.
6. The device system based on the double closed-loop regulation and control five-phase induction motor according to claim 2, wherein the signal output end of the processor is characterized in that one branch is designated by the output of the controller, the winding change-over switch in the main circuit is turned off to realize winding change-over, and the other branch is changed to realize double closed-loop regulation and control by changing the output electric signal of the five-phase frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311716022.3A CN117767840A (en) | 2023-12-13 | 2023-12-13 | Device system based on double closed-loop regulation and control five-phase induction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311716022.3A CN117767840A (en) | 2023-12-13 | 2023-12-13 | Device system based on double closed-loop regulation and control five-phase induction motor |
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| CN117767840A true CN117767840A (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311716022.3A Pending CN117767840A (en) | 2023-12-13 | 2023-12-13 | Device system based on double closed-loop regulation and control five-phase induction motor |
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| CN (1) | CN117767840A (en) |
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- 2023-12-13 CN CN202311716022.3A patent/CN117767840A/en active Pending
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