CN113517842B - Phase current reconstruction method for hybrid excitation doubly salient motor - Google Patents
Phase current reconstruction method for hybrid excitation doubly salient motor Download PDFInfo
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- CN113517842B CN113517842B CN202110791844.2A CN202110791844A CN113517842B CN 113517842 B CN113517842 B CN 113517842B CN 202110791844 A CN202110791844 A CN 202110791844A CN 113517842 B CN113517842 B CN 113517842B
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000004804 winding Methods 0.000 claims description 12
- 238000005070 sampling Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
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- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
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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
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
-
- 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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/14—Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
-
- 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
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/022—Synchronous motors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses a phase current reconstruction method of a hybrid excitation doubly salient motor, and relates to the fields of power electronics and power transmission. The invention designs a phase current reconstruction method of a hybrid excitation doubly salient motor, which cancels three current sensors for respectively measuring three-phase currents in the prior art, only uses one current sensor for measuring the three-phase currents, and reduces the number of the current sensors, the cost, the volume and the weight of a control system and the overall power density of the motor control system under the condition of not reducing the sampling precision by matching with the current reconstruction algorithm designed by the invention.
Description
Technical Field
The invention relates to the field of power electronics and power transmission, in particular to a phase current reconstruction method of a hybrid excitation doubly salient motor.
Background
The hybrid excitation doubly salient motor has the advantages of simple structure, high reliability, no winding and permanent magnet of the stator, suitability for running at high speed, long-time running under severe conditions and low cost, and is very suitable for high-speed and high-performance application occasions such as aero-generators, electric traffic carrying equipment and the like.
In the control of a hybrid excitation doubly salient motor, the sampling of phase current directly affects the performance of current control and the implementation of fault protection strategies, and is a vital link in a motor control system. In a hybrid excitation doubly salient motor system, one current sensor is typically required for each phase winding to sample the phase current, to provide individual control of each phase current. The use of these current sensors not only increases the cost and bulk of the motor system, but also reduces the reliability of the system. To solve this problem, patent CN201811321801.2, "a method for reconstructing phase current of a switched reluctance motor", discloses a method for reconstructing current by using two current sensors, which installs the current sensors at the middle point of an upper bus and the middle point of a lower bus, and reconstructs the stator current by judging the rotor angle interval, wherein the number of the current sensors is reduced, but the number of the sensors can be still further reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to solve the problems of high cost, large volume, heavy weight and low reliability caused by the large number of current sensors in the mixed excitation doubly salient motor driving system. The invention provides a phase current reconstruction method of a hybrid excitation doubly salient motor.
The invention adopts the following technical scheme for solving the technical problems:
the invention provides a phase current reconstruction method of a hybrid excitation doubly salient motor, which comprises the following modules: the motor controller comprises a motor controller main circuit (1), a current sensor (2), a current reconstruction algorithm (3), a rotary transformer and a decoding circuit (4). The motor controller main circuit (1) consists of MOS tubes or IGBT tubes Q1-Q6.
Preferably, a source electrode (emitter electrode) of a MOS tube or an IGBT tube Q1 of the motor controller main circuit (1) and a drain electrode (collector electrode) of a MOS tube or an IGBT tube Q4 of the motor controller main circuit (1) are connected together and led out to be connected to a stator winding of the hybrid excitation doubly salient motor; the MOS tube or the source electrode (emitter) of the IGBT tube Q3 of the motor controller main circuit (1), the MOS tube or the drain electrode (collector) of the IGBT tube Q6 of the motor controller main circuit (1) are connected together and led out to be connected to the stator winding of the hybrid excitation doubly salient motor; the MOS tube or the IGBT tube Q5 of the motor controller main circuit (1) and the drain electrode (collector) of the MOS tube or the IGBT tube Q2 of the motor controller main circuit (1) are connected together and led out through the current sensor (2) to be connected to the stator winding of the hybrid excitation doubly salient motor.
Preferably, the power supply U in The positive electrode of the transistor is connected with the drain electrode (collector electrode) of the MOS tube or the IGBT tube Q1 and passes through the current sensor (2) to be connected with the drain electrodes (collector electrodes) of the MOS tube or the IGBT tubes Q3 and Q5 together, and the power supply U in The negative electrode of the transistor is connected with the source electrode (collector electrode) of the MOS tube or the IGBT tube Q4 and penetrates through the current sensor (2) to be connected with the source electrodes (collector electrodes) of the MOS tubes or the IGBT tubes Q2 and Q6.
Preferably, the direction of the three wires passing through the current sensor (2) is determined according to the following criteria: assuming that only current flows out of three wires passing through the current sensor (2) from the positive electrode of the power supply Uin or the drain electrode (collector) of the MOS tube or the IGBT tube Q1, and flows into the drain electrodes (collectors) of the MOS tube or the IGBT tubes Q3 and Q5, the current sensor (2) outputs a positive signal; assuming that only current flows out of three wires passing through the current sensor (2) from the negative electrode of the power supply Uin or the source (collector) of the MOS tube or the IGBT tube Q4, and flows into the sources (collectors) of the MOS tube or the IGBT tubes Q6 and Q2, the current sensor (2) outputs a positive signal; it is assumed that only current flows out from the drain (collector) of the MOS transistor or the IGBT transistor Q2 or the drain (collector) of the MOS transistor or the IGBT transistor Q5 among three wires passing through the current sensor (2) to flow into the stator winding of the hybrid excitation doubly salient motor, and at this time, the current sensor (2) outputs a positive signal.
Preferably, the current sensor (2) outputs the sum i of the currents passing through three wires of the current sensor (2) s 。
Preferably, the input of the current reconstruction algorithm (3) is the sum i of the currents output by the current sensor (2) and passing through three wires of the current sensor (2) s The three-phase current i is obtained through the operation of a current reconstruction algorithm (3) A ，i B ，i C 。
Preferably, in the rotary transformer and the decoding circuit (4), the rotary transformer is mounted on the hybrid excitation doubly salient motor, and the motor electrical angle theta is obtained by the decoding circuit e 。
Preferably, the current reconstruction algorithm (3) is performed as follows:
electrical angle θ of motor of 360 degrees e The range of (2) is equally divided into three sections of 0-120 DEG, 120-240 DEG, 240-360 DEG, and the motor electrical angle theta is obtained from the rotary transformer and the decoding circuit (4) e Judging the section of the electric angle of the motor, and judging the electric angle theta of the motor e I is in the interval of 0-120 DEG A ＝-i s /2，i B ＝0，i C ＝i s 2; at an electrical angle theta of the motor e I is in the interval of 120-240 degrees A ＝-i s ，i B ＝i s ，i C =0, at electromechanical angle θ e I is in the interval of 240-360 degrees A ＝0，i B ＝-i s ，i C ＝i s 。
Compared with the prior art, the technical scheme provided by the invention has the following technical effects:
1. according to the invention, three-phase current can be measured by using only one current sensor, so that the number of the current sensors is reduced, the cost is reduced, the volume and the weight of a control system are reduced, and the overall power density of the motor control system is improved;
2. according to the current reconstruction algorithm designed by the invention, through interval judgment, the actual current value acquired by the current sensor is quite simply calculated to obtain the three-phase current actual value, so that the calculated amount is small, and the sampling precision is not reduced.
Drawings
FIG. 1 is a schematic diagram of a hardware control system connection of the present invention.
Fig. 2 is a schematic diagram of the current reconstruction algorithm of the present invention.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the accompanying drawings:
a phase current reconstruction method of a hybrid excitation doubly salient motor comprises the following modules: the motor controller comprises a motor controller main circuit (1), a current sensor (2), a current reconstruction algorithm (3), a rotary transformer and a decoding circuit (4). The motor controller main circuit (1) consists of MOS tubes or IGBT tubes Q1-Q6.
Preferably, a source electrode (emitter electrode) of a MOS tube or an IGBT tube Q1 of the motor controller main circuit (1) and a drain electrode (collector electrode) of a MOS tube or an IGBT tube Q4 of the motor controller main circuit (1) are connected together and led out to be connected to a stator winding of the hybrid excitation doubly salient motor; the MOS tube or the source electrode (emitter) of the IGBT tube Q3 of the motor controller main circuit (1), the MOS tube or the drain electrode (collector) of the IGBT tube Q6 of the motor controller main circuit (1) are connected together and led out to be connected to the stator winding of the hybrid excitation doubly salient motor; the MOS tube or the IGBT tube Q5 of the motor controller main circuit (1) and the drain electrode (collector) of the MOS tube or the IGBT tube Q2 of the motor controller main circuit (1) are connected together and led out through the current sensor (2) to be connected to the stator winding of the hybrid excitation doubly salient motor.
Preferably, the power supply U in The positive electrode of the transistor is connected with the drain electrode (collector electrode) of the MOS tube or the IGBT tube Q1 and passes through the current sensor (2) to be connected with the drain electrodes (collector electrodes) of the MOS tube or the IGBT tubes Q3 and Q5 together, and the power supply U in The negative electrode of the transistor is connected with the source electrode (collector electrode) of the MOS tube or the IGBT tube Q4 and penetrates through the current sensor (2) to be connected with the source electrodes (collector electrodes) of the MOS tubes or the IGBT tubes Q2 and Q6.
Preferably, the direction of the three wires passing through the current sensor (2) is determined according to the following criteria: assuming that only current flows out of three wires passing through the current sensor (2) from the positive electrode of the power supply Uin or the drain electrode (collector) of the MOS tube or the IGBT tube Q1, and flows into the drain electrodes (collectors) of the MOS tube or the IGBT tubes Q3 and Q5, the current sensor (2) outputs a positive signal; assuming that only current flows out of three wires passing through the current sensor (2) from the negative electrode of the power supply Uin or the source (collector) of the MOS tube or the IGBT tube Q4, and flows into the sources (collectors) of the MOS tube or the IGBT tubes Q6 and Q2, the current sensor (2) outputs a positive signal; it is assumed that only current flows out from the drain (collector) of the MOS transistor or the IGBT transistor Q2 or the drain (collector) of the MOS transistor or the IGBT transistor Q5 among three wires passing through the current sensor (2) to flow into the stator winding of the hybrid excitation doubly salient motor, and at this time, the current sensor (2) outputs a positive signal.
Preferably, the current sensor (2) outputs the sum i of the currents passing through three wires of the current sensor (2) s 。
Preferably, the input of the current reconstruction algorithm (3) is the sum i of the currents output by the current sensor (2) and passing through three wires of the current sensor (2) s The three-phase current i is obtained through the operation of a current reconstruction algorithm (3) A ，i B ，i C 。
Preferably, in the rotary transformer and the decoding circuit (4), the rotary transformer is mounted on the hybrid excitation doubly salient motor, and the motor electrical angle theta is obtained by the decoding circuit e 。
Preferably, the current reconstruction algorithm (3) is performed as follows:
electrical angle θ of motor of 360 degrees e The range of (2) is equally divided into three sections of 0-120 DEG, 120-240 DEG, 240-360 DEG, and the motor electrical angle theta is obtained from the rotary transformer and the decoding circuit (4) e Judging the section of the electric angle of the motor, and judging the electric angle theta of the motor e I is in the interval of 0-120 DEG A ＝-i s /2，i B ＝0，i C ＝i s 2; at an electrical angle theta of the motor e I is in the interval of 120-240 degrees A ＝-i s ，i B ＝i s ，i C =0, at electromechanical angle θ e I is in the interval of 240-360 degrees A ＝0，i B ＝-i s ，i C ＝i s 。
Claims (1)
1. A phase current reconstruction method of a hybrid excitation doubly salient motor is characterized by comprising the following steps of: three current sensors of a three-phase winding in a traditional motor system are reduced to one current sensor (2), and feedback and closed-loop control of three-phase current can be realized only by one current sensor; three wires penetrate through the current sensor (2) and are respectively a connecting wire from the drain electrode of the MOS tube Q1 to the drain electrode of the MOS tube Q3, a connecting wire from the source electrode of the MOS tube Q4 to the source electrode of the MOS tube Q6 and a connecting wire from the source electrode of the MOS tube Q5 to the motor;
the direction of the three wires passing through the current sensor (2) is determined according to the following standard: assuming that only current flows out of three wires passing through the current sensor (2) from the positive electrode of the power supply Uin or the drain electrode of the MOS tube or the IGBT tube Q1 and flows into the drain electrodes of the MOS tube or the IGBT tubes Q3 and Q5, the current sensor (2) outputs a positive signal; assuming that only current flows out of three wires passing through the current sensor (2) from the negative electrode of the power supply Uin or the source electrode of the MOS tube or the IGBT tube Q4, and flows into the source electrodes of the MOS tube or the IGBT tubes Q6 and Q2, the current sensor (2) outputs a positive signal; assuming that only current flows out of three wires passing through the current sensor (2) from the drain electrode of the MOS tube or the IGBT tube Q2 or the drain electrode of the MOS tube or the IGBT tube Q5, and flows into the stator winding of the hybrid excitation doubly salient motor, at the moment, the current sensor (2) outputs a positive signal; the input of the current reconstruction algorithm (3) is the output of the current sensor, namely the sum i of the currents of the three wires s Through the proposed current reconstruction algorithm (3), a three-phase current i can be obtained A ，i B ，i C ；
The specific principle of the current reconstruction algorithm (3) is as follows:
one electrical cycle is according to the electrical angle theta of the motor e The range of (2) is divided into three sections of 0 DEG-120 DEG, 120 DEG-240 DEG, 240 DEG-360 DEG, and the motor electric angle theta obtained from the rotary transformer and the decoding circuit (4) is used for the motor electric angle theta e Judging the section where the electric angle of the motor is located:
1) At an electrical angle theta of the motor e I is in the interval of 0-120 DEG A ＝-i s /2，i B ＝0，i C ＝i s /2；
2) At an electrical angle theta of the motor e I is in the interval of 120-240 degrees A ＝-i s ，i B ＝i s ，i C ＝0；
3) At an electrical angle theta of the motor e I is in the interval of 240-360 degrees A ＝0，i B ＝-i s ，i C ＝i s 。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110791844.2A CN113517842B (en) | 2021-07-13 | 2021-07-13 | Phase current reconstruction method for hybrid excitation doubly salient motor |
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| CN202110791844.2A CN113517842B (en) | 2021-07-13 | 2021-07-13 | Phase current reconstruction method for hybrid excitation doubly salient motor |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108039841A (en) * | 2018-01-02 | 2018-05-15 | 南京航空航天大学 | The degree of advance self-adaptation control method and system of double salient-pole electric machine drive system |
| CN109120201A (en) * | 2018-11-08 | 2019-01-01 | 中国矿业大学 | A kind of switched reluctance machines method for reconstructing phase current |
| CN110138306A (en) * | 2019-04-11 | 2019-08-16 | 南京航空航天大学 | A kind of electric excitation biconvex electrode electric machine power inverter and its method |
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- 2021-07-13 CN CN202110791844.2A patent/CN113517842B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108039841A (en) * | 2018-01-02 | 2018-05-15 | 南京航空航天大学 | The degree of advance self-adaptation control method and system of double salient-pole electric machine drive system |
| CN109120201A (en) * | 2018-11-08 | 2019-01-01 | 中国矿业大学 | A kind of switched reluctance machines method for reconstructing phase current |
| CN110138306A (en) * | 2019-04-11 | 2019-08-16 | 南京航空航天大学 | A kind of electric excitation biconvex electrode electric machine power inverter and its method |
Non-Patent Citations (1)
| Title |
|---|
| 基于反电势电流的电励磁双凸极电机驱动电路单管开路故障诊断研究;夏一文 等;电工技术学报;第第35卷卷(第第23期期);第4888-4895页 * |
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