Power-assisted remote control system for rotary frequency converter

Abstract

A power-assisted remote control system for a rotary frequency shifter belongs to the technical field of motor control, aims to solve the problems of slow response, complex structure and high cost of control systems for angles, strokes, displacements and the like of industrial remote machinery, and comprises the rotary frequency shifter, a high-frequency execution motor and a control circuit, the stator input end is provided with a split-phase capacitor, the rotation frequency converter is further provided with an output end, the high-frequency execution motor is provided with an execution motor stator input end, the execution motor stator input end is provided with a split-phase capacitor, and the execution motor stator input end, the split-phase capacitor and the control circuit are electrically connected. The high-frequency execution motor is further provided with an execution motor excitation end, the execution motor excitation end, the output end and the control circuit are electrically connected, the high-frequency execution motor at the far end is controlled through the rotary frequency shifter, the high-frequency synchronous control system has the advantages of being low in delay, high in precision, small in size and low in cost, and rapid synchronous control can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor control, specifically a rotary frequency converter assisted remote control system. Background Art

[0002] The rotary frequency converter assisted remote control system has a wide range of application scenarios and is suitable for machinery that requires remote control. It has excellent characteristics such as simple structure, high reliability, large output torque, high precision, and rapid response. The rotary frequency converter assisted remote control system is an automated precision control adjustment system and is widely used in automotive direction control, ship steering gear control, and valve control in chemical plants, pharmaceutical factories, and power plants.

[0003] In current control systems for the angle, stroke, displacement, etc. of industrial remote machinery, hydraulic and electric control systems are more commonly used. Among them, electric control generally reacts more slowly. It not only has a complex structure, large volume, high failure rate, but also has low precision. While the hydraulic control system has higher precision and greater torque, the system is more complex, accompanied by high maintenance costs, short service life, serious environmental pollution, slow reaction speed, and larger volume. And the electric servo control system, although it has higher precision, has a relatively complex structure. Usually, the reaction speed is also difficult to meet the requirements of high-demand usage scenarios, and the usage and maintenance costs are also relatively high.

[0004] In view of the above problems, a rotary frequency converter assisted remote control system is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a rotary frequency converter assisted remote control system. By using this system to work, it solves the problems of slow reaction, complex structure, and high cost in the control systems for the angle, stroke, displacement, etc. of industrial remote machinery in the above background.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A rotary frequency converter assisted remote control system includes a rotary frequency converter, a high-frequency execution motor, and a control circuit. A stator input terminal is provided on the rotary frequency converter. A split-phase capacitor is provided on the stator input terminal, and electrical connections are made among the stator input terminal, the split-phase capacitor, and the control circuit. An output terminal is also provided on the rotary frequency converter. An execution motor stator input terminal is provided on the high-frequency execution motor. A split-phase capacitor is provided on the execution motor stator input terminal, and electrical connections are made among the execution motor stator input terminal, the split-phase capacitor, and the control circuit. An execution motor excitation terminal is also provided on the high-frequency execution motor, and electrical connections are made among the execution motor excitation terminal, the output terminal, and the control circuit. The control circuit includes a high-frequency power supply, and the execution motor stator input terminal and the stator input terminal are connected to the same high-frequency power supply.

[0007] Furthermore, the stator input end includes input port 1 and input port 2, split-phase capacitors are respectively arranged on input port 1 and input port 2, and input port 1 and input port 2 are respectively electrically connected to the high-frequency power supply.

[0008] Furthermore, the output end includes a first output port and a second output port, and the first output port and the second output port are respectively electrically connected to the excitation end of the actuator motor.

[0009] Furthermore, the rotation frequency shifter includes a housing, a pair of bearings are symmetrically and fixedly installed on the housing, a stator is fixedly installed on the inner wall of the housing, and a rotor is rotatably arranged inside the housing.

[0010] Furthermore, the stator includes a stator core, and a coil 1 is sleeved on the stator core.

[0011] Furthermore, the rotor includes a rotor core, a coil 2 is wound on the rotor core, a main transmission shaft is fixedly installed through the middle of the rotor core, and the main transmission shaft is arranged through the bearings.

[0012] Furthermore, when the rotation frequency shifter is stationary, the input and output current frequencies and phases remain unchanged. The rotating magnetic field formed by the stator on the rotation frequency shifter serves as the initial frequency, and the output end superimposes corresponding frequencies according to the rotation speed of the rotor.

[0013] Furthermore, the stator core corresponding to input port 1 and the stator core corresponding to the first output port are arranged side by side on the same axis, and the stator core corresponding to input port 2 and the stator core corresponding to the second output port are also arranged side by side on the same axis. The length of the rotor core that controls the forward rotation of the rotor is the same as the length of the stator core corresponding to input port 1 and input port 2, and the length of the rotor core that controls the reverse rotation of the rotor is the same as the length of the stator core corresponding to input port 2 and the second output port.

[0014] Furthermore, each component can adopt multi-stage series and parallel connections according to the required power and frequency.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention controls the high-frequency actuator motor at a remote end through a rotation frequency shifter, and has the advantages of low delay, high precision, small volume and low cost, and can achieve fast synchronous control.

[0016] Since the excitation power generally only needs to be less than 0.5% of the rated power, the output power required by the rotation frequency shifter is small.

[0017] Since the rotation frequency shifter and the high-frequency actuator motor share the same high-frequency power supply, and since the power supply has strong anti-interference ability, therefore, the use of the rotation frequency shifter makes the control system more stable. Description of the Drawings

[0018] Figure 1 This is a circuit schematic diagram between the rotary frequency shifter, high-frequency actuator motor and control circuit of the present invention; Figure 2 This is an internal circuit schematic diagram of the rotary frequency shifter of the present invention.

[0019] In the figure: 1. Rotary frequency shifter; 11. Housing; 12. Bearing; 13. Stator; 131. Stator core; 132. Coil 1; 14. Rotor; 141. Rotor core; 142. Coil 2; 143. Main transmission shaft; 2. High-frequency actuator motor; 3. Control circuit; 4. Stator input terminal; 41. Input port 1; 42. Input port 2; 5. Split-phase capacitor; 6. Output terminal; 61. First output port; 62. Second output port; 7. Actuator motor excitation terminal; 8. Actuator motor stator input terminal. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] In order to solve the technical problems of slow response, complex structure and high cost in the control systems of the angle, stroke, displacement, etc. of industrial remote machinery, as Figure 1 - Figure 2 shown, the following preferred technical solutions are provided: The rotary frequency shifter assists the remote control system, including a rotary frequency shifter 1, a high-frequency actuator motor 2 and a control circuit 3. A stator input terminal 4 is provided on the rotary frequency shifter 1, a split-phase capacitor 5 is provided on the stator input terminal 4, and electrical connections are made among the stator input terminal 4, the split-phase capacitor 5 and the control circuit 3. An output terminal 6 is also provided on the rotary frequency shifter 1. An actuator motor stator input terminal 8 is provided on the high-frequency actuator motor 2, a split-phase capacitor 5 is provided on the actuator motor stator input terminal 8, and electrical connections are made among the actuator motor stator input terminal 8, the split-phase capacitor 5 and the control circuit 3. An actuator motor excitation terminal 7 is also provided on the high-frequency actuator motor 2, and electrical connections are made among the actuator motor excitation terminal 7, the output terminal 6 and the control circuit 3.

[0022] The control circuit 3 includes a high-frequency power supply, and the actuator motor stator input terminal 8 and the stator input terminal 4 are connected to the same high-frequency power supply.

[0023] The stator input terminal 4 includes an input port 1 41 and an input port 2 42. Split-phase capacitors 5 are respectively provided on the input port 1 41 and the input port 2 42, and the input port 1 41 and the input port 2 42 are respectively electrically connected to the high-frequency power supply.

[0024] The output terminal 6 includes a first output port 61 and a second output port 62, and the first output port 61 and the second output port 62 are electrically connected to the excitation terminal 7 of the actuator motor respectively.

[0025] The rotation frequency converter 1 includes a housing 11, a pair of bearings 12 are symmetrically and fixedly installed on the housing 11, a stator 13 is fixedly installed on the inner wall of the housing 11, and a rotor 14 is rotatably arranged inside the housing 11.

[0026] The stator 13 includes a stator core 131, a coil one 132 is sleeved on the stator core 131, the rotor 14 includes a rotor core 141, a coil two 142 is wound on the rotor core 141, and a main transmission shaft 143 is fixedly installed through the middle of the rotor core 141, and the main transmission shaft 143 is arranged through the bearings 12.

[0027] The high-frequency power supply delivers current to the coil one 132 through the input port one 41, the input port two 42 and the split-phase capacitor 5. When the current flows through the coil one 132, a magnetic flux will be generated on the stator core 131 and a rotating magnetic field will be formed. Under the action of the rotating magnetic field, the rotor core 141 and the coil two 142 drive the main transmission shaft 143 to start rotating, that is, the rotation frequency converter 1 starts to operate. Through the setting of the bearings 12, the wear of the main transmission shaft 143 can be reduced.

[0028] When the rotation frequency converter 1 is stationary, the input and output current frequencies and phases remain unchanged. The rotating magnetic field formed by the stator 13 on the rotation frequency converter 1 serves as the initial frequency, and the output terminal 6 superimposes the corresponding frequency with the rotation speed of the rotor 14.

[0029] The stator core 131 corresponding to the input port one 41 and the stator core 131 corresponding to the first output port 61 are arranged side by side on the same coaxial line, and the stator core 131 corresponding to the input port two 42 and the stator core 131 corresponding to the second output port 62 are also arranged side by side on the same coaxial line. The length of the rotor core 141 that controls the forward rotation of the rotor 14 is the same as the length of the stator core 131 corresponding to the input port one 41 and the input port two 42, and the length of the rotor core 141 that controls the reverse rotation of the rotor 14 is the same as the length of the stator core 131 corresponding to the input port two 42 and the second output port 62.

[0030] All four stator cores 131 are wound with an appropriate number of turns of coil one 132 to match the current to be input and output. The rotor core 141 is wound with coil two 142 or replaced by a squirrel cage. The rotating magnetic field directions of the two cores are opposite. Such a design is to make the torques generated by the eddy current magnetic fields cancel each other out to avoid additional torque interference with the torque controlling the rotor 14.

[0031] The rotary frequency shifter-assisted remote control system can adopt multi-stage series and parallel connections according to the required power and frequency, has connection diversity, and is relatively flexible to use.

[0032] Refer to Figure 1 As shown, the dotted line in the figure is the wiring method when driving a high-power motor, and at the same time, the split-phase capacitor 5 should be cancelled; 0 of the high-frequency power supply is the common line, + is the phase line leading by 90 degrees, and - is the phase line lagging by 90 degrees.

[0033] The specific working principle is as follows: The rotary frequency shifter 1 at the control end and the high-frequency actuator motor 2 at the controlled end share a set of high-frequency power supplies (usually single-phase, two-phase for extra-large power). When the rotor 14 of the rotary frequency shifter 1 at the control end rotates a certain angle or number of revolutions, the high-frequency actuator motor 2 at the controlled end will also rotate the corresponding angle or number of revolutions, achieving precise control and avoiding the phenomenon of slow response; in addition, the high-frequency actuator motor 2 at the controlled end can be used as a linear motor, and personnel can control the remote end to perform translation operations through the cooperation of the rotary frequency shifter 1 at the control end and the high-frequency actuator motor 2 at the controlled end.

[0034] The rotary frequency shifter 1 essentially belongs to an induction type high-frequency motor. The operating frequency of the motor is usually above kilohertz. Therefore, it has the characteristics of small volume, light weight, and large power. The two groups of coils 132 on the stator input end 4 are connected into a split-phase motor to form a rotating magnetic field in the stator 13, one rotating forward and one rotating backward (to balance the torque caused by the eddy current to rotate the rotor 14). The coil 142 can also be arranged in a squirrel-cage type according to needs. The length of the rotor core 141 is the same as the length of the stator core 131. The stator core 131 is arranged in parallel with the stator input end 4. When the rotor 14 is stationary, the high-frequency power supply is input to the stator input end 4, and a corresponding high-frequency electric potential will be induced at the output end 6, and the phase difference is equal to that of the stator input end 4 of the rotary frequency shifter 1. When the rotor 14 rotates an angle or number of revolutions, a changing phase angle electric potential or frequency will be output at the output end 6 of the rotary frequency shifter 1, which is used to control the actuator excitation end 7 of the high-frequency actuator motor 2 at the remote end.

[0035] The high-frequency actuator motor 2 at the remote end of the rotary frequency shifter-assisted remote control system is a synchronous high-frequency motor. The high-frequency power supply connected to the actuator stator input end 8 of the high-frequency actuator motor 2 is the same as that of the rotary frequency shifter 1, and the actuator excitation end 7 of the high-frequency actuator motor 2 is connected to the output end 6 of the rotary frequency shifter 1. When the rotor 14 in the rotary frequency shifter 1 is stationary, the high-frequency actuator motor 2 remains stationary. When the rotor 14 in the rotary frequency shifter 1 rotates a specific angle or number of revolutions, the high-frequency actuator motor 2 also rotates the corresponding angle or number of revolutions, with high precision and low delay, and can achieve fast synchronous control. Since the excitation power usually only needs to be less than 0.5% of the rated power, the output power required by the rotary frequency shifter 1 is also very small.

[0036] In principle, a frequency generator can also be used to simulate the rotary frequency converter 1 and the power supply with angular variation to control the high-frequency actuator motor 2. However, in practical applications, the frequency offset of the frequency generator may cause unexpected actions in the control system and unnecessary accidents. The interference pulses of electrical operations may also interfere with the precise operation of the system. Since the rotary frequency converter 1 and the high-frequency actuator motor 2 share the same high-frequency power supply and the power supply has strong anti-interference ability, therefore, the use of the rotary frequency converter 1 usually provides much stronger stability for the control system than the simulated power supply.

[0037] From the above description, it can be seen that the rotary frequency converter-assisted remote control system adopts the high-frequency power phase angle control technology, and has excellent characteristics such as small volume, low cost, low failure rate, large torque, and fast response, and is suitable for the usage scenarios that require remote instant control.

[0038] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0039] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Rotary frequency shifter power-assisted remote control system, characterized in that: The invention comprises a rotary frequency shifter (1), a high-frequency actuator motor (2) and a control circuit (3); the rotary frequency shifter (1) is provided with a stator input terminal (4); the stator input terminal (4) is provided with a split phase capacitor (5); the stator input terminal (4), the split phase capacitor (5) and the control circuit (3) are electrically connected; the rotary frequency shifter (1) is also provided with an output terminal (6); the high-frequency actuator motor (2) is provided with an actuator motor stator input terminal (8); the actuator motor stator input terminal (8) is provided with a split phase capacitor (5); the actuator motor stator input terminal (8), the split phase capacitor (5) and the control circuit (3) are electrically connected; the high-frequency actuator motor (2) is also provided with an actuator motor excitation terminal (7); the actuator motor excitation terminal (7), the output terminal (6) and the control circuit (3) are electrically connected; The control circuit (3) includes a high-frequency power supply, and the stator input terminal (8) and the stator input terminal (4) of the execution motor are connected to the same high-frequency power supply.

2. The rotary frequency shifter power-assisted remote control system according to claim 1, characterized in that: The stator input end (4) comprises an input port 1 (41) and an input port 2 (42), and the input port 1 (41) and the input port 2 (42) are respectively provided with a phase-splitting capacitor (5), and the input port 1 (41) and the input port 2 (42) are respectively electrically connected to the high-frequency power supply.

3. The rotary frequency shifter power-assisted remote control system according to claim 2, characterized in that: The output end (6) comprises a first output port (61) and a second output port (62), and the first output port (61) and the second output port (62) are electrically connected to the excitation end (7) of the execution motor respectively.

4. The rotary frequency shifter power-assisted remote control system according to claim 3, characterized in that: The rotary frequency shifter (1) comprises a housing (11), a pair of bearings (12) are symmetrically fixedly mounted on the housing (11), a stator (13) is fixedly mounted on the inner wall of the housing (11), and a rotor (14) is rotatably arranged inside the housing (11).

5. The rotary frequency shifter power-assisted remote control system according to claim 4, characterized in that: The stator (13) comprises a stator iron core (131), and a coil 1 (132) is sleeved on the stator iron core (131).

6. The rotary frequency shifter power-assisted remote control system according to claim 5, characterized in that: The rotor (14) comprises a rotor core (141), a second coil (142) is wound around the rotor core (141), a main transmission shaft (143) is fixedly installed through the middle of the rotor core (141), and the main transmission shaft (143) is installed through the bearing (12).

7. The rotary frequency shifter power-assisted remote control system according to claim 6, characterized in that: The input and output current frequencies and phases of the rotating frequency shifter (1) remain unchanged when the rotating frequency shifter (1) is stationary. The rotating magnetic field formed by the stator (13) on the rotating frequency shifter (1) serves as the initial frequency, and the output end (6) is superimposed with the corresponding frequency according to the rotation speed of the rotor (14).

8. The rotary frequency shifter power-assisted remote control system according to claim 7, characterized in that: The stator core (131) corresponding to the first input port (41) and the stator core (131) corresponding to the first output port (61) are arranged in parallel on a coaxial line, and the stator core (131) corresponding to the second input port (42) and the stator core (131) corresponding to the second output port (62) are also arranged in parallel on a coaxial line. The length of the rotor core (141) for controlling the forward rotation of the rotor (14) is consistent with the length of the stator core (131) corresponding to the first input port (41) and the second input port (42), and the length of the rotor core (141) for controlling the reverse rotation of the rotor (14) is consistent with the length of the stator core (131) corresponding to the second input port (42) and the second output port (62).

9. The rotary frequency shifter power-assisted remote control system according to claim 8, characterized in that: The components can be connected in series or in parallel in multiple stages according to the required power and frequency.

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