Control circuit for double permanent magnet synchronous motors

Abstract

The utility model discloses a control circuit for double permanent magnet synchronous motors. The control circuit comprises a main starting motor, a PI regulator, an auxiliary starting motor, an auxiliary power supply controller, a first permanent magnet synchronous motor and a second permanent magnet synchronous motor, the main starting motor is connected with the PI regulator, the PI regulator is connected with the auxiliary starting motor, and the auxiliary starting motor is connected with the auxiliary power supply controller, the first permanent magnet synchronous motor and the second permanent magnet synchronous motor. According to the utility model, fine feedback adjustment of the double permanent magnet motors is realized through the auxiliary starting motor, since the main starting motor has a starting delay error, after the permanent magnet motors feed back a rotating speed error to the auxiliary starting motor, the auxiliary power supply controller controls the auxiliary starting motor to adjust the rotating speed so as to realize synchronization; in addition, the auxiliary power supply controller is not restricted by the main starting motor, and a control algorithm can be set for simulation, so that the universality of the circuit is improved.

Description

Technical Field

[0001] The utility model belongs to the field of synchronous motors, and in particular relates to a dual permanent magnet synchronous motor control circuit. Background Art

[0002] The control of dual motors is used in almost all fields of industrial automation production, such as paper machines, wheel hub cars, vehicle-mounted guns, etc. High-precision control is one of the main concerns in the field of motor control. The power of a single motor is no longer sufficient in some industrial occasions. Dual motors and multiple motors are adopted by people. As long as high-precision synchronization performance is achieved, they can replace the low-efficiency single motor drive [18-20]. However, there are more factors to consider in dual motor control than in single motor control, such as speed synchronization, torque synchronization, speed accuracy, etc. If dual motors drive a load together, it is necessary to ensure that the synchronization performance between the two motors is optimal. For dual motor synchronous control systems, improving the synchronous control structure and synchronous control algorithm to improve system performance has become one of the research hotspots.

[0003] In order to achieve synchronous and coordinated operation between two motors in a control system, there are usually two processing methods: mechanical synchronization and electrical synchronization. For electrical synchronization, the current synchronous motor mainly studies the improvement of control algorithms and reduces errors through synchronization algorithms. However, due to differences in hardware circuits, the algorithms adapted to each circuit are different, making the algorithm less universal. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model provides a dual permanent magnet synchronous motor control circuit. The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0005] A dual permanent magnet synchronous motor control circuit, comprising:

[0006] A main starting motor, a PI regulator, an auxiliary starting motor, an auxiliary power supply controller, a first permanent magnet synchronous motor, and a second permanent magnet synchronous motor;

[0007] The main starting motor is connected to the PI regulator, the PI regulator is connected to the auxiliary starting motor, and the auxiliary starting motor is connected to the auxiliary power supply controller, the first permanent magnet synchronous motor and the second permanent magnet synchronous motor.

[0008] In a specific embodiment, the first permanent magnet synchronous motor and the second permanent magnet synchronous motor both include:

[0009] A first feedback device, a speed regulator, a second feedback device, a first current PI controller, a third feedback device, a second current PI controller, a Park inverse converter, an SVPWM module, an IPM three-phase inverter bridge module, a Clark conversion module, a Park conversion module, an encoder, and a permanent magnet synchronous motor;

[0010] The first feedback device is connected to the auxiliary starting motor and the speed regulator, the speed regulator is connected to the second feedback device, the second feedback device is connected to the first current PI controller, the third feedback device is connected to the second current PI controller, the first current PI controller and the second current PI controller are both connected to the Park inverter, the Park inverter is connected to the SVPWM module, the SVPWM module is connected to the IPM three-phase inverter bridge module, the IPM three-phase inverter bridge module is connected to the Clark transformation module and the permanent magnet synchronous motor, the Clark transformation module is connected to the Park transformation module, the Park transformation module is connected to the second feedback device and the third feedback device, the permanent magnet synchronous motor is connected to the encoder, and the encoder is connected to the Park inverter, the Park transformation module and the first feedback device.

[0011] In a specific embodiment, the secondary power controller includes:

[0012] 220V voltage source, rectification and filtering module, voltage stabilizing module, single-chip computer module, voltage output module; the 220V voltage source input end is connected to the rectification and filtering module, the rectification and filtering module is connected to the voltage stabilizing module, the voltage stabilizing module is connected to the single-chip computer module, and the single-chip computer module is connected to the voltage output module.

[0013] In a specific implementation, the voltage output module includes a 30V output terminal, a 12V output terminal and a 5V output terminal.

[0014] In a specific implementation, the single chip microcomputer module is a STM32F103 core board.

[0015] Beneficial effects of the utility model:

[0016] The dual permanent magnet synchronous motor control circuit of the utility model realizes fine feedback regulation of the dual permanent magnet motors through the auxiliary starting motor. Since the main starting motor has a starting delay error, the permanent magnet motor feeds back the speed error to the auxiliary starting motor, and then controls the auxiliary starting motor to adjust the speed through the auxiliary power supply controller to achieve synchronization. In addition, since the auxiliary power supply controller is not restricted by the main starting motor, the control algorithm can also be set for simulation, thereby improving the versatility of the circuit.

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a dual permanent magnet synchronous motor control circuit module provided by an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of a permanent magnet synchronous motor module provided by an embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of a secondary power supply controller provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with specific embodiments, but the implementation methods of the present invention are not limited thereto. Example

[0022] See also Figure 1 , Figure 1 This is a schematic diagram of a dual permanent magnet synchronous motor control circuit module provided by an embodiment of the utility model, including:

[0023] A main starting motor 1, a PI regulator 2, an auxiliary starting motor 3, an auxiliary power supply controller 4, a first permanent magnet synchronous motor 5, and a second permanent magnet synchronous motor 6;

[0024] The main starting motor 1 is connected to the PI regulator 2 , the PI regulator is connected to the auxiliary starting motor 3 , and the auxiliary starting motor 3 is connected to the auxiliary power supply controller 4 , the first permanent magnet synchronous motor 5 and the second permanent magnet synchronous motor 6 .

[0025] In a specific implementation, please continue to see Figure 2 , the first permanent magnet synchronous motor 5 and the second permanent magnet synchronous motor 6 both include:

[0026] A first feedback device 51, a speed regulator 52, a second feedback device 53, a first current PI controller 54, a third feedback device 55, a second current PI controller 56, a Park inverse converter 57, a SVPWM module 58, an IPM three-phase inverter bridge module 59, a Clark conversion module 60, a Park conversion module 61, an encoder 62, and a permanent magnet synchronous motor 63;

[0027] The first feedback device 51 is connected to the auxiliary starting motor 3 and the speed regulator 52, the speed regulator 52 is connected to the second feedback device 53, the second feedback device 53 is connected to the first current PI controller 54, the third feedback device 55 is connected to the second current PI controller 56, the first current PI controller 54 and the second current PI controller 56 are both connected to the Park inverter 57, the Park inverter 57 is connected to the SVPWM module 58, the SVPWM module 58 is connected to the IPM three-phase inverter bridge module 59, the IPM three-phase inverter bridge module 59 is connected to the Clark transformation module 60 and the permanent magnet synchronous motor 63, the Clark transformation module 60 is connected to the Park transformation module 61, the Park transformation module 61 is connected to the second feedback device 53 and the third feedback device 55, the permanent magnet synchronous motor 63 is connected to the encoder 62, and the encoder 62 is connected to the Park inverter 57, the Park transformation module 61 and the first feedback device 51.

[0028] This embodiment combines a parallel structure and a master-slave structure. The first permanent magnet synchronous motor 5 and the second permanent magnet synchronous motor 6 can be regarded as a slave structure, and at the same time a parallel structure. By adding an auxiliary starting motor 3 between the main starting motor 1 and the first permanent magnet synchronous motor 5 and the second permanent magnet synchronous motor 6, mutual compensation is formed to form a coupling relationship, and the auxiliary starting motor 3 can freely select compensation parameters to correct the synchronization error. If one of the first permanent magnet synchronous motor 5 and the second permanent magnet synchronous motor 6 changes due to load changes, etc., the signal fed back to the first feedback device 51 can be synchronously received and corrected by the other permanent magnet synchronous motor and the auxiliary starting motor 3 at the same time.

[0029] The dual permanent magnet synchronous motor control circuit of this embodiment realizes fine feedback regulation of the dual permanent magnet motors through the auxiliary starting motor. Since the main starting motor has a starting delay error, the permanent magnet motor feeds back the speed error to the auxiliary starting motor, and then controls the auxiliary starting motor to adjust the speed through the auxiliary power controller to achieve synchronization. In addition, since the auxiliary power controller is not restricted by the main starting motor, the control algorithm can also be set for simulation, thereby improving the versatility of the circuit.

[0030] In a specific implementation, please continue to see Figure 3 , the secondary power controller 4 includes:

[0031] 220V voltage source 41, rectification and filtering module 42, voltage stabilizing module 43, single-chip computer module 44, voltage output module 45; the input end of the 220V voltage source 41 is connected to the rectification and filtering module 42, the rectification and filtering module 42 is connected to the voltage stabilizing module 43, the voltage stabilizing module 43 is connected to the single-chip computer module 44, and the single-chip computer module 44 is connected to the voltage output module 45.

[0032] Specifically, the input of the 220V voltage source adopts the mains power input through the industrial frequency transformer, the rectifier bridge of the rectifier and filter module 42 is the KBP206 rectifier bridge, and the voltage regulator of the voltage regulator module 43 is the three-terminal voltage regulator LM7805 and LM7812.

[0033] In a specific implementation, the voltage output module includes a 30V output terminal, a 12V output terminal and a 5V output terminal.

[0034] In a specific implementation, the single chip microcomputer module is a STM32F103 core board.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0038] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in a claim. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0039] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A dual permanent magnet synchronous motor control circuit, characterized in that: include: A main starting motor, a PI regulator, an auxiliary starting motor, an auxiliary power supply controller, a first permanent magnet synchronous motor, and a second permanent magnet synchronous motor; The main starting motor is connected to the PI regulator, the PI regulator is connected to the auxiliary starting motor, and the auxiliary starting motor is connected to the auxiliary power supply controller, the first permanent magnet synchronous motor and the second permanent magnet synchronous motor.

2. The dual permanent magnet synchronous motor control circuit according to claim 1, characterized in that: The first permanent magnet synchronous motor and the second permanent magnet synchronous motor both include: A first feedback device, a speed regulator, a second feedback device, a first current PI controller, a third feedback device, a second current PI controller, a Park inverse converter, an SVPWM module, an IPM three-phase inverter bridge module, a Clark conversion module, a Park conversion module, an encoder, and a permanent magnet synchronous motor; The first feedback device is connected to the auxiliary starting motor and the speed regulator, the speed regulator is connected to the second feedback device, the second feedback device is connected to the first current PI controller, the third feedback device is connected to the second current PI controller, the first current PI controller and the second current PI controller are both connected to the Park inverter, the Park inverter is connected to the SVPWM module, the SVPWM module is connected to the IPM three-phase inverter bridge module, the IPM three-phase inverter bridge module is connected to the Clark transformation module and the permanent magnet synchronous motor, the Clark transformation module is connected to the Park transformation module, the Park transformation module is connected to the second feedback device and the third feedback device, the permanent magnet synchronous motor is connected to the encoder, and the encoder is connected to the Park inverter, the Park transformation module and the first feedback device.

3. The dual permanent magnet synchronous motor control circuit according to claim 1, characterized in that: The secondary power controller comprises: 220V voltage source, rectification and filtering module, voltage stabilizing module, single-chip computer module, voltage output module; the 220V voltage source input end is connected to the rectification and filtering module, the rectification and filtering module is connected to the voltage stabilizing module, the voltage stabilizing module is connected to the single-chip computer module, and the single-chip computer module is connected to the voltage output module.

4. The dual permanent magnet synchronous motor control circuit according to claim 3, characterized in that: The voltage output module includes a 30V output terminal, a 12V output terminal and a 5V output terminal.

5. The dual permanent magnet synchronous motor control circuit according to claim 3, characterized in that: The single chip microcomputer module is an STM32F103 core board.

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