CN211151781U - Inner stator excitation wide speed regulation range synchronous motor - Google Patents
Inner stator excitation wide speed regulation range synchronous motor Download PDFInfo
- Publication number
- CN211151781U CN211151781U CN201920173495.6U CN201920173495U CN211151781U CN 211151781 U CN211151781 U CN 211151781U CN 201920173495 U CN201920173495 U CN 201920173495U CN 211151781 U CN211151781 U CN 211151781U
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- rotor
- stator
- winding
- inner stator
- inverter circuit
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- 230000005284 excitation Effects 0.000 title claims abstract description 41
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 24
- 238000004804 winding Methods 0.000 claims abstract description 60
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 230000010349 pulsation Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a wide speed regulation range synchronous motor excited by an inner stator, which comprises an inner stator, an outer stator and a rotor radially arranged between the inner stator and the outer stator; the inner stator comprises an inner stator iron core, and a distributed multi-phase rotor excitation winding is embedded in the inner stator iron core; the outer stator comprises an outer stator iron core, and a distributed multi-phase stator winding is embedded in the outer stator iron core; the rotor includes a rotor core with neither permanent magnets nor windings thereon. The inner stator excitation wide speed regulation range synchronous motor of the utility model adopts electric excitation to the rotor, so that the magnetic field of the rotor can be adjusted, and the speed regulation range of the motor is enlarged; the rotor excitation winding is arranged on the inner stator, so that a carbon brush slip ring is omitted, and the system reliability is improved; the stator winding and the rotor winding are distributed multi-phase windings, and the magnetic field of the stator and the rotor is closer to a circle in the operation of the motor, so that the electromagnetic torque pulsation is smaller.
Description
Technical Field
The invention relates to the technical field of synchronous motors and control thereof, in particular to an inner stator excited synchronous motor with a wide speed regulation range and a control system thereof.
Background
To widen the speed control range of the synchronous motor, the rotor excitation magnetic field needs to be adjusted. The existing synchronous motor mostly adopts rotor excitation, and the rotor excitation is divided into rotor electric excitation and rotor permanent magnet. The rotor electric excitation is to lead direct current into a rotor excitation winding to generate a rotor excitation magnetic field. Because the excitation winding is arranged on the rotating rotor, the carbon brush and the slip ring are needed to be used for introducing external direct current into the rotor excitation winding, and therefore the system has the advantages of complex structure, high cost, large maintenance workload and low reliability. The rotor permanent magnet is obtained by embedding or attaching a permanent magnet on the rotor. The permanent magnetic field of the rotor in the form is not adjustable, the magnetic field of the motor is difficult to adjust, and the risk of demagnetization of the permanent magnetic field exists. In addition, the firmness of the permanent magnet rotor, especially the permanent magnet surface-mounted permanent magnet rotor, is reduced, which affects the reliability of the permanent magnet rotor in high-speed operation.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the inner stator excitation wide speed regulation range synchronous motor which has the advantages of simple structure, convenient maintenance and convenient rotor excitation regulation and can reliably run in a wide speed range, and the control system thereof.
The invention is practiced by the following technical scheme:
a wide speed regulation range synchronous motor excited by an inner stator comprises the inner stator, an outer stator and a rotor radially arranged between the inner stator and the outer stator; the inner stator comprises an inner stator iron core, and a distributed multi-phase rotor excitation winding is embedded in the inner stator iron core; the outer stator comprises an outer stator iron core, and a distributed multi-phase stator winding is embedded in the outer stator iron core; the rotor includes a rotor core with neither permanent magnets nor windings thereon.
According to the inner stator excited synchronous motor with the wide speed regulation range, the rotor adopts electric excitation, so that the magnetic field of the rotor is adjustable, and the speed regulation range of the motor is expanded; the rotor excitation winding is arranged on the inner stator, so that a carbon brush slip ring is omitted, and the system reliability is improved; the stator winding and the rotor winding are distributed multi-phase windings, and the magnetic field of the stator and the rotor is closer to a circle in the operation of the motor, so that the electromagnetic torque pulsation is smaller.
Preferably, the rotor excitation winding and the stator winding are respectively supplied with power through a rotor power electronic inverter circuit and a stator power electronic inverter circuit.
Preferably, the motor further comprises a rotor position detection device for detecting the current position of the rotor, and the rotor position detection device controls the on-off of the switch tubes in the stator and rotor power electronic inverter circuits according to the current position of the rotor so as to control the operation of the motor.
A control system of a wide speed regulation range synchronous motor excited by an inner stator is characterized in that: and according to the current position of the rotor, the on-off of a switch tube in the power electronic inverter circuit of the stator and the rotor is controlled by adopting a voltage space vector modulation control technology to generate a magnetic field of the rotor and the stator so as to control the operation of the motor.
The invention has the beneficial effects that: the invention is different from the common rotor excitation synchronous motor in the operation principle that the concentrated excitation winding on the rotor of the common rotor excitation synchronous motor is replaced by the distributed multi-phase winding on the inner stator, and the rotor excitation magnetic field rotating synchronously with the rotor is generated by the voltage space vector control technology, and is equivalent to the rotor magnetic field generated by the excitation winding on the rotor of the common rotor excitation synchronous motor.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic structural diagram of a wide speed regulation range synchronous motor excited by an inner stator according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the stator power electronic inverter circuit and the rotor power electronic inverter circuit and the connection mode of the winding speed of the stator and the rotor of the motor shown in FIG. 1;
fig. 3 is a structural block diagram of a wide speed regulation range synchronous motor control system excited by an inner stator.
In fig. 1, 1-1 is an outer stator, 2-1 is a rotor, 3-1 is an inner stator, 1-2 is a stator equivalent a-phase winding head a +, 1-3 is a stator equivalent B-phase winding head B +, 1-4 is a stator equivalent C-phase winding head C +, 1-5 is a stator equivalent a-phase winding tail a +, 1-6 is a stator equivalent B-phase winding tail B-, 1-7 is a stator equivalent C-phase winding tail C-, 3-2 is a rotor equivalent a-phase winding head a +, 3-3 is a rotor equivalent B-phase winding head B +, 3-4 is a rotor equivalent C-phase winding head C +, 3-5 is a rotor equivalent a-phase winding tail a-, 3-6 is a rotor equivalent B-phase winding tail B-, and 3-7 is a rotor equivalent C-phase winding tail C-;
in fig. 2, Ud is the supply voltage of the stator winding and the rotor excitation winding, U, V, W is divided into output ends of the stator power electronic inverter circuit, and u, v, and w are the output ends of the rotor power electronic inverter circuit, respectively.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Referring to fig. 1, the inner stator excited synchronous motor with a wide speed regulation range of the present invention includes an inner stator 3-1 and an outer stator 1-1, and a rotor 2-1 radially disposed between the inner stator 3-1 and the outer stator 1-1; the inner stator 3-1 comprises an inner stator iron core, and a plurality of groups of distributed multi-phase rotor excitation windings are embedded in the inner stator iron core; the outer stator 1-1 comprises an outer stator iron core, and a plurality of groups of distributed multi-phase stator windings are embedded in the outer stator iron core; the rotor 2-1 comprises a rotor core with neither permanent magnets nor windings.
In this embodiment, the rotor excitation winding and the stator winding are respectively supplied with power through a rotor power electronic inverter circuit and a stator power electronic inverter circuit, and the motor further includes a rotor position detection device for detecting a current position of the rotor, where the rotor position detection device controls on/off of switching tubes in the stator and the rotor power electronic inverter circuits according to the current position of the rotor, so as to control operation of the motor.
With reference to fig. 2, the control system of the internal stator excited synchronous motor with a wide speed regulation range of the present invention controls the on-off of the switch tubes in the stator and rotor power electronic inverter circuits by adopting a voltage space vector modulation control technology according to the current position of the rotor, so as to generate the rotor and stator magnetic fields, and further control the operation of the motor.
Referring to fig. 3, the stator winding and the rotor winding of the motor are all star-connected. The stator winding of the motor is powered by the stator power electronic inverter circuit, and the rotor excitation winding of the motor is powered by the rotor power electronic inverter circuit. The stator power electronic inverter circuit and the rotor power electronic inverter circuit are powered by a common direct current power supply. The control and drive circuit includes processing the collected signals in the motor operation, combining the rotation speed to set the voltage Space Vector (SVPWM) control algorithm to realize the rotor magnetic field and the stator magnetic field, generating the control signal of the electronic power electronic inverter circuit and the power electronic switch tube of the rotor power electronic inverter circuit, and controlling the motor operation
The invention is different from the common rotor excitation synchronous motor in the operation principle that the concentrated excitation winding on the rotor of the common rotor excitation synchronous motor is replaced by the distributed multi-phase winding on the inner stator, and the rotor excitation magnetic field rotating synchronously with the rotor is generated by the voltage space vector control technology, and is equivalent to the rotor magnetic field generated by the excitation winding on the rotor of the common rotor excitation synchronous motor.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (2)
1. The utility model provides a wide speed control range synchronous motor of internal stator excitation which characterized in that: comprises an inner stator (3-1) and an outer stator (1-1), and a rotor (2-1) arranged radially between the inner stator (3-1) and the outer stator (1-1); the inner stator (3-1) comprises an inner stator iron core, and a distributed multi-phase rotor excitation winding is embedded in the inner stator iron core; the outer stator (1-1) comprises an outer stator iron core, and a distributed multi-phase stator winding is embedded in the outer stator iron core; the rotor (2-1) comprises a rotor core, and the rotor core is provided with neither permanent magnet nor winding; the motor comprises a stator winding and a rotor winding, wherein the stator winding and the rotor winding are all star-connected, the stator winding is powered by a stator power electronic inverter circuit, a motor rotor excitation winding is powered by a rotor power electronic inverter circuit, the stator power electronic inverter circuit and the rotor power electronic inverter circuit are powered by a common direct-current power supply, the motor further comprises a rotor position detection device for detecting the current position of the rotor, and the rotor position detection device controls the on-off of a switch tube in the stator power electronic inverter circuit and the rotor power electronic inverter circuit according to the current position of the rotor so as to control the operation of the motor.
2. The internal stator excited wide speed range synchronous motor of claim 1, wherein: and the rotor excitation winding and the stator winding are respectively supplied with power through a rotor power electronic inverter circuit and a stator power electronic inverter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920173495.6U CN211151781U (en) | 2019-01-31 | 2019-01-31 | Inner stator excitation wide speed regulation range synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920173495.6U CN211151781U (en) | 2019-01-31 | 2019-01-31 | Inner stator excitation wide speed regulation range synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211151781U true CN211151781U (en) | 2020-07-31 |
Family
ID=71759339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920173495.6U Expired - Fee Related CN211151781U (en) | 2019-01-31 | 2019-01-31 | Inner stator excitation wide speed regulation range synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211151781U (en) |
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2019
- 2019-01-31 CN CN201920173495.6U patent/CN211151781U/en not_active Expired - Fee Related
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| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: BINZHOU University Document name: Notice of deemed failure to entrust agency |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200731 |