A multi-channel variable capacitance capacitor device and its operating method
By using a multi-channel variable capacitance capacitor device and connecting it with contactors to form different capacitance adjustment zones, the problems of high noise and wear in traditional variable capacitors are solved, and flexible adjustment and high-precision control of capacitance value are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HARBIN UNIV OF SCI & TECH
- Filing Date
- 2022-11-10
- Publication Date
- 2026-06-30
AI Technical Summary
Traditional variable capacitors suffer from problems such as high noise, mechanical wear and tear, and short service life, making it difficult to meet the different adjustment ranges and accuracy requirements of capacitance values.
A multi-channel variable capacitance capacitor device is adopted, and different capacitance adjustment zones are formed by the combination of contactors. The host computer controls the on and off of the contactors to realize the automatic adjustment of the capacitance value, including XY, YZ and XZ adjustment zones. The capacitance adjustment circuit is established by the combination of contactors S1r, S2s and S3t respectively.
It enables flexible adjustment of capacitance value, improves the adjustment accuracy and range, simplifies operation, enhances control flexibility and maintenance convenience, and has overcapacitance protection function.
Smart Images
Figure CN115621054B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of variable capacitor devices. More specifically, it discloses a method for operating a multi-channel variable capacitance capacitor device. Background Technology
[0002] Capacitors can be classified into two types based on their capacitance range. The first type is the variable capacitor, also known as the adjustable capacitor. The capacitance of this type of capacitor can be changed at any time, and its dielectric is usually in the form of air or film. The second type is the semi-variable capacitor, also known as the trimmer capacitor. The capacitance of this type of capacitor is fixed and does not change at any time. Its dielectric is usually in the form of air, ceramic, or film.
[0003] Variable capacitors can be classified into two types based on their dielectric material: air-dielectric variable capacitors and solid-dielectric variable capacitors. Air-dielectric variable capacitors consist of a set of moving plates and a set of fixed plates. The moving plates are the rotatable set of electrodes, while the fixed plates are the stationary set. Air serves as the dielectric material between the moving and fixed plates. Solid-dielectric variable capacitors also have a set of moving plates and a set of fixed plates, but a plastic film or mica sheet is added between the two sets of metal plates as the dielectric. Their outer casing is made of transparent plastic.
[0004] The above describes a traditional variable capacitor. This type of variable capacitor uses a mechanical structure, which has the advantages of being small in size and light in weight, making it suitable for use in microelectronic instruments. However, it also has many disadvantages, such as high noise during operation and the fact that the metal plates are prone to wear due to the mechanical structure, which affects the service life of the variable capacitor. Summary of the Invention
[0005] To address the aforementioned problems, this invention provides a method for operating a multi-channel variable capacitance capacitor device, satisfying the requirements for different capacitance adjustment ranges and different adjustment accuracies.
[0006] The first aspect of the present invention provides a multi-channel variable capacitance capacitor device, comprising a capacitor device and a control system. The capacitor device includes an access point X, an access point Y, an access point Z, a first capacitor unit, a second capacitor unit, a third capacitor unit, and a fourth capacitor unit. The first capacitor unit includes n capacitors C connected in parallel. Ai The second capacitor unit consists of n capacitors C connected in series, i = 1, 2, ..., n. Bj j = 1, 2, ..., n; the third capacitor unit consists of n capacitors C connected in series. Ck k = 1, 2, ..., n; the fourth capacitor unit consists of n capacitors C connected in parallel. Dl l = 1, 2, ..., n;
[0007] Access point X, access point Y, and the second capacitor unit form a loop, and capacitor C B1 To capacitor C B(n-1) Capacitor C is connected to both ends. A1 To C An Establish connection with access point X, capacitor C Ai Contactors S are respectively installed between the access point X and the access point X. 1r r = 1, 2, ..., n; connection point Y, connection point Z, and the third capacitor unit form a circuit, capacitor C C1 To capacitor C C(n-1) Capacitor C is connected to both ends. D1 To C Dn Establish connection with access point Z, capacitor C Dl With the corresponding capacitor C Ck Contactors S are respectively installed between them. 2s s = 1, 2, ..., n; capacitor C B1 To capacitor C B(n-1) Both ends are connected to contactor S 3t Connect capacitor C respectively C1 To capacitor C C(n-1) Two ends, where t = 1, 2, ..., n.
[0008] Furthermore, the capacitor C Ai and capacitor C Bn The capacitance values are all C m / 2, where i = 1, 2, ..., n;
[0009] The capacitor C Bj Capacitor C Ck and capacitor C Dl The capacitance values are all C m , where j = 1, 2, ..., n-1, k = 1, 2, ..., n, l = 1, 2, ..., n.
[0010] Furthermore, the control system includes a host computer, a CAN analyzer, and a capacitor control device.
[0011] A second aspect of the present invention provides a method for operating a multi-channel variable capacitance capacitor device, implemented based on the aforementioned multi-channel variable capacitance capacitor device, comprising:
[0012] Select the capacitance adjustment zone according to the required capacitance value range. The capacitance adjustment zone includes the XY adjustment zone, the YZ adjustment zone, and the XZ adjustment zone.
[0013] In the XY adjustment region, with connection points X and Y as DC input terminals, the capacitor C in the first capacitor unit... AiCapacitor C in the second capacitor unit Bj Let be the capacitor in the XY adjustment region, where i = 1, 2, ..., n; j = 1, 2, ..., n;
[0014] In the YZ adjustment zone, with connection points Y and Z as DC input terminals, the capacitor C in the second capacitor unit... Bj Capacitor C in the third capacitor unit Ck And capacitor C in the fourth capacitor unit Dl For the capacitor in the YZ adjustment zone, contactor S 3t All remain in the ON state, where j = 1, 2, ..., n-1, k = 1, 2, ..., n; l = 1, 2, ..., n; t = 1, 2, ..., n;
[0015] In the XZ adjustment zone, with connection points Y and Z as DC input terminals, the capacitor C in the first capacitor unit... Ai The capacitor C in the second capacitor unit Bj Capacitor C in the third capacitor unit Ck And capacitor C in the fourth capacitor unit Dl Let be the capacitor in the XZ adjustment region, where i = 1, 2, ..., n; j = 1, 2, ..., n; k = 1, 2, ..., n; l = 1, 2, ..., n.
[0016] Furthermore, the method for adjusting the capacitance value of the XY adjustment zone is as follows: Adjust contactor S 1r The connection and disconnection of each contactor S 1r The connection and disconnection combinations establish the corresponding capacitor regulation circuit.
[0017] Furthermore, in the XY adjustment zone, when contactor S... 1r When all are connected, the maximum capacitance value C is reached. max1 When contactor S 1r When both are disconnected, the minimum capacitance value C is reached. min1 .
[0018] Furthermore, the method for adjusting the capacitance value of the YZ adjustment zone is as follows: Adjust contactor S 2s The connection and disconnection of each contactor S 2s The connection and disconnection combinations establish the corresponding capacitor regulation circuit.
[0019] Furthermore, in the YZ adjustment zone, when contactor S... 2s When all are connected, the maximum capacitance value C is reached. max2 When contactor S 2s When both are disconnected, the minimum capacitance value C is reached. min2 .
[0020] Furthermore, the method for adjusting the capacitance value of the XZ adjustment zone includes...
[0021] Contactor S 31 Connect, S 32 To S 3n Disconnect and adjust contactor S 1r and contactor S 2s The connection and disconnection of each contactor S 1r and contactor S 2s The connection and disconnection combinations establish corresponding capacitor regulation circuits;
[0022] Contactor S 3n Connect, S 31 To S 3(n-1) Disconnect and adjust contactor S 1r and contactor S 2s The connection and disconnection of each contactor S 1r and contactor S 2s The connection and disconnection combinations establish the corresponding capacitor regulation circuit.
[0023] Furthermore, in the XZ adjustment zone, contactor S 31 Connect, S 32 To S 3n When the contactor S is open, 1r and contactor S 2s When all are connected, the maximum capacitance value C is reached. max3 When contactor S 1r and contactor S 2s When all are turned off, the minimum capacitance value C is reached. min3 ;
[0024] Contactor S 3n Connect, S 31 To S 3(n-1) When the contactor S is open, 1r and contactor S 2s When all are connected, the maximum capacitance value C is reached. max4 When contactor S 1r and contactor S 2s When all are turned off, the minimum capacitance value C is reached. min4 .
[0025] Compared with the prior art, the present invention has the following technical advantages:
[0026] 1. The present invention provides a multi-channel variable capacitance capacitor device comprising different capacitance adjustment zones. Different adjustment zones can be selected according to the capacitance value adjustment range and accuracy, and the capacitance value can be increased or decreased using a contactor. Each adjustment zone employs multiple series and parallel connection methods, and the varying number of capacitors and connection methods can further expand the capacitance value adjustment range and accuracy.
[0027] 2. The capacitor of the present invention automatically adjusts the capacitance value through a host computer. Compared with the traditional control method, it is simple to operate, flexible to control, convenient to maintain, and the obtained capacitance value has high accuracy and a wide control range.
[0028] 3. During the operation of the capacitor device of the present invention, a capacitance adjustment circuit is obtained by adjusting different contactors to output the required capacitance value, making the operation process simpler and more flexible.
[0029] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the control system structure according to a specific embodiment of the present invention;
[0031] Figure 2 This is a circuit diagram of a capacitor device according to a specific embodiment of the present invention;
[0032] Figure 3 This is a control principle diagram of a capacitor device according to a specific embodiment of the present invention;
[0033] Figure 4 This is a circuit diagram of a capacitor device for selecting the XY adjustment region according to a specific embodiment of the present invention;
[0034] Figure 5 This is a circuit diagram of a capacitor device selecting the YZ adjustment region according to a specific embodiment of the present invention;
[0035] Figure 6 This is a circuit diagram of a capacitor device selecting the XZ adjustment region according to a specific embodiment of the present invention;
[0036] Figure 7 In a specific embodiment of the present invention, contactor S 31 Connect, S 32 To S 38 When disconnected, the circuit diagram of the capacitor device selecting the XZ adjustment zone;
[0037] Figure 8 In a specific embodiment of the present invention, contactor S 31 To S 37Disconnect, S 38 The circuit diagram for selecting the XZ adjustment zone of the capacitor device when it is turned on. Detailed Implementation
[0038] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.
[0039] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0040] Some exemplary embodiments of the invention have been described for illustrative purposes. It should be understood that the invention may be implemented in other ways not specifically shown in the accompanying drawings.
[0041] like Figure 1 As shown, a multi-channel variable capacitance capacitor device includes a capacitor device, a host computer, a CAN analyzer, and a capacitor control device. The host computer, CAN analyzer, and capacitor control device constitute a control system. The capacitor control device mainly consists of a power supply, a microcontroller control system, relays, and an alarm. The capacitor includes multiple capacitors and contactors. The host computer controls the on / off state of the contactors to change the capacitance value. CAN communication is used to control the on / off state of the contactors via the host computer, thereby changing the capacitance value. The CAN analyzer interface is connected to the host computer interface to receive commands from the host computer. These commands are then converted into CAN communication commands and sent to the capacitor control device. After receiving the CAN communication commands, the microcontroller control system in the device controls the corresponding relays. The relays use a small current loop to control a large current loop; therefore, the relays can control the contactors in the capacitor device. By controlling the on / off state of each contactor through commands from the host computer, the capacitance value is adjusted.
[0042] The capacitor device has three DC terminals: X, Y, and Z. Therefore, when providing capacitance to external devices, there are three ways to connect DC power: XY, XZ, and YZ. Depending on the wiring method, the selected adjustment range will also differ, resulting in different variable capacitance value ranges and accuracies.
[0043] like Figure 2 As shown, in one specific embodiment, the capacitor device includes a first capacitor unit, a second capacitor unit, a third capacitor unit, and a fourth capacitor unit. The first capacitor unit includes eight capacitors C connected in parallel. A1 C A2 C A3 C A4 C A5 C A6 C A7 C A8 The second capacitor unit includes eight capacitors C connected in series. B1 C B2 C B3 C B4 C B5 C B6 C B7 C B8 The third capacitor unit includes eight capacitors C connected in series. C1 C C2 C C3 C C4 C C5 C C6 C C7 C C8 The fourth capacitor unit consists of eight capacitors C connected in parallel. Dl C D2 C D3 C D4 C D5 C D6 C D7 C D8 ;
[0044] Access point X, access point Y, and the second capacitor unit form a loop, and capacitor C B1 To capacitor C B7 Capacitor C is connected to both ends of the capacitor. A1 -C A8 Establish connection with access point X, capacitor C A1 C A2 C A3 C A4 C A5 C A6 C A7 C A8 Contactors S are respectively installed between the access point X and the access point X. 11 S 12 S 13 S 14 S 15 S 16 S 17 S18 Connection point Y, connection point Z, and the third capacitor unit form a circuit, and capacitor C C1 -C C7 Capacitor C is connected to both ends. D1 -C D8 Establish connection with access point Z, capacitor C Dl -C D8 With the corresponding capacitor C C1 -C C8 Contactors S are respectively installed between them. 21 -S 28 Capacitor C B1 -C B7 Both ends are connected to contactor S 31- S 38 Connect capacitor C respectively C1 To capacitor C C8 Both ends.
[0045] In this embodiment, the capacitor C A1 -C A8 and capacitor C B8 The capacitance values are all C m / 2; the capacitor C B1 -C B7 Capacitor C C1 -C C8 and capacitor C D1 -C D8 The capacitance values are all C m .
[0046] The number of capacitors in each capacitor unit can be set as needed. To further improve the adjustment accuracy of the variable capacitor device, capacitors and contactors can be connected in series and parallel in the same way on the basis of the existing structure. When multiple sets of capacitors and contactors are connected in series and parallel, the adjustment accuracy can be increased by 2 times. Conversely, when the adjustment accuracy is not high, the number of capacitors connected in series and parallel can be reduced in the same way.
[0047] Based on the above-mentioned multi-channel variable capacitance capacitor device, its control method is as follows: Figure 2 As shown, it includes:
[0048] First, select from three connection methods—XY, YZ, and XZ—based on the required capacitance range. These three connection methods represent the XY adjustment zone, YZ adjustment zone, and XZ adjustment zone, respectively. The connection method is set through the host computer.
[0049] The required capacitance value is set as needed. The required capacitance value is obtained through the selected XY adjustment area, YZ adjustment area and XZ adjustment area. When the set capacitance value exceeds the variable range under this connection method, the circuit breaker mode is activated to cut off the power to the capacitor device to protect the capacitor device. At the same time, the alarm sounds.
[0050] like Figure 4 As shown, in the XY adjustment zone, contactor S 31 Always in the ON state, with connection points X and Y as DC input terminals, capacitor C in the first capacitor unit A1 -C A8 Capacitor C in the second capacitor unit B1 -C B8 For the capacitors in the XY adjustment region, the capacitance value is adjusted by using various series and parallel connection methods.
[0051] The adjustment method for this adjustment zone includes: adjusting contactor S 11 -S 18 The contactor S connects and disconnects. 11 -S 18 Different combinations of switching on and off of contactors are used to establish corresponding capacitor regulation circuits.
[0052] Contactor S 11 -S 18 The switch state is represented by "0" and "1", where "0" represents the contactor is open and "1" represents the contactor is closed. That is, any set of binary numbers from 00000000 to 11111111 can represent S. 11 -S 18 From the switching state of the contactor S, we can know that... 11 -S 18 There are a total of 2 different states 8 There are 256 combinations, each corresponding to a different capacitance value.
[0053] 1) When contactor S 11 -S 18 When all contacts are connected, contactor S... 11 -S 18 The state is recorded as 11111111, reaching the maximum capacitance value C. max1 The capacitance value in this state can be calculated starting from the right side of the circuit diagram; at this point, the capacitor C... A8 With capacitor C B8 The formula for calculating the parallel capacitance value is shown in equation (1):
[0054]
[0055] The capacitor C connected in parallelA8 C B8 Then with C B7 When connected in series, the capacitance is 0.5C. m Then with C A7 The capacitance after parallel connection is C. m And so on, the final total capacitance value across X and Y is C. m That is, the maximum capacitance C at both ends of X and Y at this time. max1 C m .
[0056] 2) When contactor S 11 -S 18 When all contacts are disconnected, contactor S... 11 -S 18 The state is recorded as 00000000, and the capacitance value in this state is related to C. A1 -C A8 Irrelevant, meaning the circuit becomes C B1 -C B8 Connect them in series to achieve the minimum capacitance value C across X and Y. min1 The formula for calculating the total capacitance is shown in equation (2):
[0057]
[0058] Calculations show that the total capacitance across the X and Y terminals in this state is 0.11Cm, which is the minimum capacitance value C. min1 0.11C m .
[0059] 3) When contactor S 11 -S 18 When a switch is simultaneously in an on / off state, for example, when contactor S... 11 -S 18 When the state is 11000000, the capacitance value can be calculated starting from the rightmost side of the circuit, i.e., C in this circuit. B2 -C B8 Connected in series, and then with C A2 Parallel connection, then with C B1 Series, with C A1 When connected in parallel, the total capacitance across the X and Y terminals in this state is 0.88C. m When contactor S 11 -S 18 When the states are in other combinations, the capacitance values under different state combinations are obtained using a similar calculation method.
[0060] like Figure 5 As shown, in the YZ adjustment region, with connection points Y and Z as DC input terminals, the capacitor C in the second capacitor unit...B1 -C B7 Capacitor C in the third capacitor unit C1 -C C8 And capacitor C in the fourth capacitor unit Dl -C D8 The capacitors in the YZ adjustment zone are connected in various series and parallel configurations to adjust their capacitance values. The contactor S... 11 -S 18 All remain in the open state, contactor S 31 -S 38 All remain connected;
[0061] The method for adjusting the capacitance value of the YZ adjustment zone is as follows: Adjust contactor S... 21 -S 28 The connection and disconnection of each contactor S 2s The connection and disconnection combinations establish the corresponding capacitor regulation circuit.
[0062] Similar to the above embodiments, "0" and "1" are used to indicate contactor S. 21 -S 28 The state can be represented by any set of numbers from 00000000 to 11111111 in binary. 21 -S 28 From the switching state of the contactor S, we can know that... 21 -S 28 There are a total of 2 8 There are 256 combinations, each corresponding to a different capacitance value.
[0063] 1) Capacitor C C1 -C C7 With C B1 -C B7 These correspond to parallel connections, i.e., C C1 With C B1 Parallel, C C2 With C B2 Connect in parallel, and so on, until the capacitance value of each parallel connection is 2C. m When contactor S 21 -S 28 The switching state is 11111111, reaching the maximum capacitance value C. max2 At this point, the capacitance value can be calculated starting from the rightmost side of the circuit, i.e., capacitor C. C8 With C D8 The capacitance value is calculated using the formula (3) for parallel connection:
[0064] C = C C8 +C D8 =C m +C m =2Cm (3)
[0065] Then C C7 and C B7 After being connected in parallel, it is connected in series. The capacitance after series connection is C. m Then with C D7 The capacitor is connected in parallel, and the capacitance value after parallel connection is 2C. m And so on, the final total capacitance across Y and Z is 2C. m That is, the maximum capacitance C across the Y and Z terminals. max2 For 2C m .
[0066] 2) When contactor S 21 -S 28 If the switch state is 00000000, then the total capacitance across Y and Z is related to C. Dl -C D8 It doesn't matter; at this point, the minimum capacitance value C is reached. min2 In this state, the circuit becomes C. C1 -C C7 and C B1 -C B7 After corresponding parallel connection, then with C B8 The capacitance values at the Y and Z ends in series are calculated using the formula (4):
[0067]
[0068] The final total capacitance across the Y and Z terminals is 0.22C. m That is, the minimum capacitance value C at the Y and Z terminals. min2 0.22C m .
[0069] 3) When contactor S 21 -S 28 When a switch is simultaneously in an on / off state, for example, when contactor S... 21 -S 28 When the state is 11000000, the capacitance value can be calculated starting from the rightmost side of the circuit, i.e., C in this circuit. C2 -C C7 and C B2 -C B7 After corresponding parallel connection, then with C C8 Connected in series, and then with C D2 Parallel connection, then series connection C C1 With C B1 Parallel connection, and then with C D1 When connected in parallel, the total capacitance across the Y and Z terminals is 1.77C. m When contactor S 21 -S28 When the states are in other combinations, the capacitance values under different state combinations are obtained using a similar calculation method.
[0070] like Figure 6 As shown, in the XZ adjustment zone, with connection points Y and Z as DC input terminals, the capacitor C in the first capacitor unit... A1 -C A8 The capacitor C in the second capacitor unit B1 -C B8 Capacitor C in the third capacitor unit C1 -C C8 And capacitor C in the fourth capacitor unit D1 -C D8 The capacitors in the XZ adjustment zone are used to adjust their capacitance values through various series and parallel connection methods.
[0071] The XZ control zone is a combination of the XY and YZ control zones, utilizing all capacitors and contactors. Contactor S... 21 -S 28 and S 11 -S 18 The switch state is defined as "0" and "1", where "0" represents the contactor is open and "1" represents the contactor is closed. That is, any set of binary numbers from 00000000 to 11111111 can represent S. 21 -S 28 and S 11 -S 18 The switching state of contactor S 31 -S 38 Used to connect two functional areas in series. Depending on the selected on / off state of the contactor, it can be divided into the following two methods:
[0072] Mode 1: such as Figure 7 As shown, in this mode, contactor S 31 Connect, S 32 To S 38 Disconnect and adjust contactor S 11 -S 18 and contactor S 21 -S 28 The connection and disconnection of each contactor S 11 -S 18 and contactor S 21 -S 28 The switching on and off combinations establish corresponding capacitor regulation circuits; contactor S 11 -S 18 and contactor S 21 -S 28 There are 2 each 8A combination, through S 31 When connected in series, its capacitance can reach 2. 16 kind.
[0073] 1) When contactor S 11 -S 18 and contactor S 21 -S 28 When both switch states are 11111111, the upper part of the circuit is the same as the first case in the XY adjustment area. Therefore, the capacitance value can be calculated starting from the rightmost side of the circuit, i.e., capacitor C. B8 and C A8 The capacitance value is calculated as shown in equation (1) when connected in parallel, and then combined with C. B7 When connected in series, the capacitance is 0.5C. m Then with C A7 The capacitance after parallel connection is C. m Following this logic, the total capacitance of the upper part is C. m Similarly, the total capacitance of the lower half is calculated to be 1.62C. m The upper and lower capacitors are connected in series, resulting in a total capacitance of 0.62C at the two endpoints of XZ in this mode. m .
[0074] 2) When contactor S 11 -S 18 and contactor S 21 -S 28 When both the switch states are 00000000, the total capacitance value at the XZ terminal is equal to that at C. D1 -C D8 and C 25 -C 32 Irrelevant, meaning the circuit becomes C C1 -C C8 With C B1 -C B8 Series connection. Its contactor S 31 The upper part of the circuit is the same as the third case in the first functional area, that is, the capacitance value calculation formula is as shown in equation (2), and the contactor S is obtained. 31 The total capacitance of the upper part is 0.11C. m Similarly, the total capacitance of the lower half is calculated to be 0.13C. m The two capacitors are connected in series, and their total capacitance is 0.06C. m .
[0075] As can be seen from the above, in mode 1, when contactor S 11 -S 18 and contactor S 21 -S 28 When all contacts are connected, the maximum capacitance value C is reached. max30.62C m When contactor S 11 -S 18 and contactor S 21 -S 28 When all are turned off, the minimum capacitance value C is reached. min3 , is 0.06C m When contactor S 11 -S 18 and contactor S 21 -S 28 When the switching states are used in other combinations, the required capacitance value can be obtained.
[0076] Mode 2, such as Figure 8 As shown, contactor S 38 Connect, S 31 To S 37 Disconnect and adjust contactor S 11 -S 18 and contactor S 21 -S 28 The connection and disconnection of each contactor S 11 -S 18 and contactor S 21 -S 28 The switching on and off of contactor S establishes a corresponding capacitor regulation circuit. 11 -S 18 and contactor S 21 -S 28 There are 2 each 8 This combination, when connected in series with S8, can achieve a capacitance value of 2. 16 kind.
[0077] 1) When contactor S 11 -S 18 and contactor S 21 -S 28 When both switches are in state 11111111, in this case, the right side of the upper circuit contains capacitor C. B8 and C A8 The capacitance value is calculated using the formula shown in equation (1) for parallel connection, yielding a capacitance value of C. m On the left is C first. B1 and C A1 The capacitance of the series connection is C. m / 3, then with C A2 By connecting them in parallel and so on, the total capacitance of the upper part is 1.50 C. m Similarly, the total capacitance of the lower half can be calculated to be 2.62C. m The two capacitors are connected in series, and their total capacitance is 0.95C. m .
[0078] 2) When contactor S 11 -S 18 and contactor S 21 -S 28 If the switch states are all 00000000, then the total capacitance value is related to C. A1 -C A8 C B1 -C B7 C C1 -C C7 and C D1 -C D8 Irrelevant, meaning the circuit becomes C C8 With C B8 For series connection, the total capacitance is calculated using the formula shown in equation (5):
[0079]
[0080] Therefore, the total capacitance value is C. m / 3, which is 0.33C m .
[0081] As can be seen from the above, in mode 2, contactor S 11 -S 18 and contactor S 21 -S 28 When all terminals are connected, the maximum capacitance value C across XZ is obtained. max4 0.95C m Contactor S 11 -S 18 and contactor S 21 -S 28 When all terminals are disconnected, the minimum capacitance value C across XZ is obtained. min4 0.33C m When contactor S 11 -S 18 and contactor S 21 -S 28 Using other combinations of states, we obtain a value at 0.33C. m and 0.95C m The remaining capacitance values between.
[0082] In the three adjustment regions described in the above embodiments, the XY adjustment region has 256 capacitance values, with the minimum value being 0.11C. m The maximum value is C m That is, the capacitance value range is 0.11C. m and C m Since there are only 256 capacitance values within this range, this functional area is defined as the low-precision area. The YZ adjustment area has 256 capacitance values, with a minimum value of 0.22C. mThe maximum value is 2C m That is, the capacitance value range is 0.22C. m and 2C m Between. Compared to the XY adjustment region, the YZ adjustment region has a range twice that of the first functional region. Since this region contains only 256 capacitance values, it is defined as a low-precision region. Both operating modes of the XZ adjustment region have 2... 16 The capacitance values are 0.06C. m -0.62C m 0.33C m -0.95C m Therefore, this functional area is defined as a high-precision area.
[0083] This device connects multiple capacitors to contactors via series and parallel connections, and uses a host computer to control the contactors' on / off states to change the capacitance value. It is divided into multiple adjustment zones, each with a different adjustable capacitance range, and further divided into high-precision and low-precision zones to meet different capacitance value requirements. This variable capacitor device has overcapacitance protection; when the preset value exceeds its adjustable range, it will automatically stop operating to protect the device and issue an alarm. All operations of this device are completed by the host computer. Compared with traditional variable capacitors, it adopts an automatic control method, which is simple to operate, flexible in control, convenient in maintenance, and provides high accuracy and a wide control range for the obtained capacitance value.
[0084] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.
Claims
1. A multi-channel variable capacitance capacitor device, characterized in that, The system includes a capacitor bank and a control system. The capacitor bank includes access points X, Y, and Z, a first capacitor unit, a second capacitor unit, a third capacitor unit, and a fourth capacitor unit. The first capacitor unit includes n capacitors C connected in parallel. Ai , i = 1, 2, ..., n; The second capacitor unit includes n capacitors C connected in series. Bj j = 1, 2, ..., n; The third capacitor unit includes n capacitors C connected in series. Ck k = 1, 2, ..., n; The fourth capacitor unit consists of n capacitors C connected in parallel. Dl l=1,2,…,n; Access point X, access point Y, and the second capacitor unit form a loop, and capacitor C B1 To capacitor C B（n-1） Both ends are connected to capacitor C A1 To C An Establish connection with access point X, capacitor C Ai Contactors S are respectively installed between the access point X and the access point X. 1r r=1,2,…,n; connection point Y, connection point Z, and the third capacitor unit form a circuit, capacitor C C1 To capacitor C C（n-1） Both ends are connected to capacitor C D1 To C Dn Establish connection with access point Z, capacitor C Dl With the corresponding capacitor C Ck Contactors S are respectively installed between them. 2s s = 1, 2, ..., n; capacitor C B1 To capacitor C B（n-1） Both ends are connected to contactor S 3t Connect capacitor C respectively C1 To capacitor C C（n-1） Two ends, where t = 1, 2, ..., n.
2. The multi-channel variable capacitance capacitor device according to claim 1, characterized in that, Capacitor C Ai and capacitor C Bn The capacitance values are all C m / 2, where i=1,2,…,n; Capacitor C Bj Capacitor C Ck and capacitor C Dl The capacitance values are all C m , where j=1,2,…,n-1, k=1,2,…,n, l=1,2,…,n.
3. The multi-channel variable capacitance capacitor device according to claim 1, characterized in that, The control system includes a host computer, a CAN analyzer, and a capacitor control device.
4. A method for operating a multi-channel variable capacitance capacitor device, characterized in that, Based on any one of claims 1-3, a multi-channel variable capacitance capacitor device is implemented, comprising: Select the capacitance adjustment zone according to the required capacitance value range. The capacitance adjustment zone includes the XY adjustment zone, the YZ adjustment zone, and the XZ adjustment zone. In the XY adjustment zone, contactor S 31 Always in the ON state, with connection points X and Y as DC input terminals, capacitor C in the first capacitor unit Ai Capacitor C in the second capacitor unit Bj Let be the capacitor in the XY adjustment region, where i = 1, 2, ..., n; j = 1, 2, ..., n; In the YZ adjustment zone, contactor S 11 -S 18 Both remain in the off state, with connection points Y and Z as DC input terminals, and capacitor C in the second capacitor unit. Bj Capacitor C in the third capacitor unit Ck And capacitor C in the fourth capacitor unit Dl For the capacitor in the YZ adjustment zone, contactor S 3t All remain in the ON state, where j=1,2,…,n-1, k=1,2,…,n; l=1,2,…,n; t=1,2,…,n; In the XZ adjustment zone, with connection points X and Z as DC input terminals, the capacitor C in the first capacitor unit... Ai The capacitor C in the second capacitor unit Bj Capacitor C in the third capacitor unit Ck And capacitor C in the fourth capacitor unit Dl Let be the capacitor in the XZ adjustment region, where i = 1, 2, ..., n; j = 1, 2, ..., n; k = 1, 2, ..., n; l = 1, 2, ..., n.
5. The operating method of the multi-channel variable capacitance capacitor device according to claim 4, characterized in that, The method for adjusting the capacitance value of the XY adjustment zone is as follows: Adjust contactor S... 1r The connection and disconnection of each contactor S 1r The connection and disconnection combinations establish the corresponding capacitor regulation circuit.
6. The operating method of the multi-channel variable capacitance capacitor device according to claim 5, characterized in that, In the XY adjustment zone, when contactor S 1r When all are connected, the maximum capacitance value C is reached. max1 When contactor S 1r When both are disconnected, the minimum capacitance value C is reached. min1 .
7. The operating method of the multi-channel variable capacitance capacitor device according to claim 4, characterized in that, The method for adjusting the capacitance value of the YZ adjustment zone is as follows: Adjust contactor S... 2s The connection and disconnection of each contactor S 2s The connection and disconnection combinations establish the corresponding capacitor regulation circuit.
8. The operating method of the multi-channel variable capacitance capacitor device according to claim 7, characterized in that, In the YZ adjustment zone, when contactor S 2s When all are connected, the maximum capacitance value C is reached. max2 When contactor S 2s When both are disconnected, the minimum capacitance value C is reached. min2 .
9. The operating method of the multi-channel variable capacitance capacitor device according to claim 4, characterized in that, The capacitance adjustment method for the XZ adjustment zone includes... Contactor S 31 Connect, S 32 To S 3n Disconnect and adjust contactor S 1r and contactor S 2s The connection and disconnection of each contactor S 1r and contactor S 2s The connection and disconnection combinations establish corresponding capacitor regulation circuits; Contactor S 3n Connect, S 31 To S 3（n-1） Disconnect and adjust contactor S 1r and contactor S 2s The connection and disconnection of each contactor S 1r and contactor S 2s The connection and disconnection combinations establish the corresponding capacitor regulation circuit.
10. The operating method of the multi-channel variable capacitance capacitor device according to claim 9, characterized in that, In the XZ adjustment zone, contactor S 31 Connect, S 32 To S 3n When the contactor S is open, 1r and contactor S 2s When all are connected, the maximum capacitance value C is reached. max3 When contactor S 1r and contactor S 2s When all are turned off, the minimum capacitance value C is reached. min3 ; Contactor S 3n Connect, S 31 To S 3（n-1） When the contactor S is open, 1r and contactor S 2s When all are connected, the maximum capacitance value C is reached. max4 When contactor S 1r and contactor S 2s When all are turned off, the minimum capacitance value C is reached. min4 .