Multi-resonant electrosurgical generator

Abstract

A multi-resonant therapy converter is disclosed that includes N+1 branches coupled to a voltage source and ground, each branch including two transistors. The two transistors of each branch include a high-side transistor coupled to the voltage source and a low-side transistor coupled to the high-side transistor and ground. The multi-resonant therapy converter includes N resonant tanks, each resonant tank coupled to a respective one of the N+1 branches and a coil. The coil is also coupled to one of the N+1 branches. A first resonant tank is associated with a first operation and a second resonant tank is associated with a second operation. The coil is selectively powered with the first resonant tank and the second resonant tank based on states of the transistors of the N+1 branches.

Description

Technical Field

[0001] This disclosure relates generally to power generation during surgical procedures, and more specifically to an electrosurgical generator for powering surgical instruments and comprising multiple resonant circuits. Background Technology

[0002] Electrical generators are used to power surgical instruments during surgical procedures. These generators are designed to work with specific instruments and meet medical standards to ensure safety, reliability, and accuracy. For example, a monopolar generator, used with monopolar surgical instruments for cutting and coagulating tissue, requires a grounding pad to complete the circuit. A bipolar generator, on the other hand, does not require a grounding pad because the current can pass through the surgical instrument, reducing the risk of electrical burns. These generators allow for precise control of the power output to surgical instruments, which can be adjusted based on the type of tissue and the desired effect.

[0003] Electrosurgical generators are designed to operate at specific frequencies to cut, coagulate, dry, or electrocauterize tissue. A malfunctioning generator or an inappropriate frequency can lead to excessive heat generation, which can cause burns to the patient. Therefore, electrosurgical generators should be calibrated to operate at specific frequencies to prevent situations that could compromise the safety and effectiveness of the device receiving power from the electrosurgical generator. Attached Figure Description

[0004] Figure 1 This is a block diagram of an example surgical system including surgical instruments and a conversion unit, which includes a multi-resonance therapy transducer.

[0005] Figure 2 It is based on at least one aspect of this disclosure Figure 1 The multi-resonant circuit of the multi-resonant therapy converter.

[0006] Figure 3A It is based on at least one aspect of this disclosure Figure 1 The clutch circuit of the multi-resonance therapy converter.

[0007] Figure 3B It is based on at least one aspect of this disclosure. Figure 3A The composite waveform generated by the clutch circuit.

[0008] Figure 4 It is based on at least one aspect of this disclosure Figure 1 The N-channel circuit of the multi-resonant therapy converter.

[0009] Figure 5 It is for use Figure 1 Multi-resonance therapy converter to control delivery to Figure 1 A schematic flowchart illustrating an example method for powering surgical instruments. Detailed Implementation

[0010] Embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. For consistency, similar elements in multiple figures may be indicated by similar reference numerals. Furthermore, numerous specific details are set forth in the following detailed description of embodiments of this disclosure to provide a more thorough understanding of the claimed subject matter. However, it will be apparent to those skilled in the art that the embodiments disclosed herein can be practiced without these specific details. In other instances, well-known features have not been described in detail to avoid unnecessarily complicating the description. Additionally, it will be apparent to those skilled in the art that the scale of the elements presented in the drawings may be altered without departing from the scope of this disclosure.

[0011] The embodiments of this disclosure relate generally to power generation during surgical procedures, and more specifically to an electrosurgical generator for powering surgical instruments and comprising multiple resonant circuits. As described herein, a resonant circuit can be a circuit including reactive components such as inductors and capacitors. The resonant circuit can operate as a bandpass filter, allowing signals within a specific frequency range to pass through the resonant circuit while attenuating signals outside that range. For operation as a bandpass filter, the resonant circuit may include reactive components arranged in series. Furthermore, a series resonant circuit exhibits low impedance at its resonant frequency, resulting in a low voltage drop across the resonant circuit relative to the impedance. Conversely, if the resonant circuit does not operate at the resonant frequency of the received signal, the resonant circuit has relatively high impedance. Therefore, higher impedance results in a higher voltage drop across the resonant circuit relative to the frequency away from the resonant frequency.

[0012] In electrosurgical applications, variations in voltage and frequency can affect the safety and effectiveness of surgical procedures performed by coupled surgical instruments that act as loads for the electrosurgical circuit. For example, turning a surgical instrument on or off can affect the frequency response of the electrosurgical circuit, causing components such as resonant circuits to receive different frequencies. Consequently, the circuit's frequency may deviate from the resonant frequency of the resonant circuit, causing a change in the circuit's impedance and resulting in a voltage drop across the resonant circuit. Because surgical instruments are configured to operate at specific voltages, this voltage drop caused by frequency variations can reduce the safety and effectiveness of the associated surgical procedures. Therefore, electrosurgical circuits can be operated to switch between two or more resonant circuits to limit the voltage drop caused by frequency variations.

[0013] Figure 1A schematic diagram of an example surgical system 100 is illustrated, which may include surgical instruments 104 operable to perform surgical procedures. Surgical instruments 104 may be electrosurgical units for performing at least cutting and cauterizing tissue procedures. Surgical instruments 104 can perform various procedures, such as therapeutic delivery procedures and pediatric delivery procedures. Therapeutic delivery procedures can be performed to cut or otherwise manipulate adult human tissue, while pediatric delivery procedures can be performed to manipulate pediatric tissue or other fragile tissue. To perform these different procedures, surgical instruments 104 may require different power levels. For example, therapeutic delivery procedures may require power between 100 watts (W) and 400 W, while pediatric delivery procedures may require power equal to or less than 50 W.

[0014] The surgical system 100 may also include a power source 108 that supplies power to the surgical instruments 104. The power source 108 may be a primary power source, such as utility or grid power. The voltage supplied by the power source 108 may range from 90 volts alternating current (Vac) to 240 Vac, which is common in small businesses and residential buildings in North America. Alternatively, the power source 108 may provide 208 / 120 Vac or 480 / 277 Vac.

[0015] Regardless of the phase, the supplied alternating current (AC) power can be regulated to safely and efficiently operate the surgical instruments 104 coupled to the power source 108. Therefore, the surgical system 100 may include a conversion unit 112 that receives power from the power source 108 and provides output power usable by the surgical instruments 104. The conversion unit 112 may include various devices, components, or subcircuits to convert the power supplied by the power source 108. For example, the conversion unit 112 may include an AC / DC power supply 116 that can convert AC to DC via rectification, filtering, and regulation. Thus, the AC / DC power supply 116 can convert AC power to DC power. The DC power generated by the AC / DC power supply 116 can be provided to a converter 120, which may be a DC-DC converter capable of increasing or decreasing the DC voltage supplied by the AC / DC power supply 116. The voltage converted by converter 120 can be provided to multiresonant therapy converter 124, which includes a set of resonant circuits, which will be described in more detail below, and can be used to generate waveforms (e.g., AC) with desired characteristics, such as a specific frequency. For voltage conversion, multiresonant therapy converter 124 may include additional components, such as switching elements, as discussed further herein.

[0016] The multi-resonance therapy transducer 124 can provide a waveform to a first coil 128, which can be inductively coupled to a second coil 130 of the isolation transformer 132. For example... Figure 1As shown, the first coil 128 can be the output of the conversion unit 112, which supplies power to the surgical instrument 104 via the isolation transformer 132. That is, the conversion unit 112 can receive voltage from the power source 108 and supply voltage to the surgical instrument 104 via the first coil 128. The second coil 130 can be inductively coupled to the first coil 128, so that the second coil 130 can receive power from the conversion unit 112. The first coil 128 and the second coil 130 can isolate the surgical instrument 104 from the conversion unit 112, thereby protecting sensitive devices including the surgical instrument 104 from power surges.

[0017] Surgical instrument 104 may be coupled to a second coil 130 via relay 134. Relay 134 may be a double-blade double-throw (DPDT) relay capable of switching between two different loads. For example, surgical instrument 104 may be the first load, and model 138 coupled to relay 134 may be the second load. Model 138 may be a circuit configured to have an impedance matched or at least substantially matched to the impedance of the tissue during surgical procedures. Relay 134 may be switched between inputs including a plurality of switching units 112.

[0018] The surgical system 100 may also include a controller 142 for controlling the means of the conversion unit 112 to control power delivery to the surgical instrument 104. The controller 142 may be a microprocessor, or a microprocessor paired with a field-programmable gate array (FPGA), to provide control logic to the conversion unit 112. The AC / DC power supply 116, the converter 120, and the multi-therapeutic resonant converter 124 may each include switches that control how voltages are converted at these respective means. The controller 142 may provide control signals (e.g., pulse-width modulation signals) that can open and close the switches of the respective means of the conversion unit 112, thereby controlling how voltages are converted by the conversion unit 122.

[0019] Surgical system 100 may include ammeters 146 and voltmeters 148 at various locations within surgical system 100 to measure current and voltage, such as Figure 1 The positions shown are indicated. The current and voltage measured by these ammeters 146 and voltmeters 148 can be provided as feedback to controller 142, which can control the operation of one or more devices within the surgical system 100 based on the received current and voltage measurements. The voltage and current can have desired or anticipated levels corresponding to the desired waveform to be supplied to the surgical instrument 104. Therefore, controller 142 can adjust the operation of conversion unit 112 to adjust the corresponding voltage and current to achieve the desired / anticipated levels.

[0020] The controller 142 can adjust the operation of the AC / DC power supply 116, converter 120, or multiresonant therapy converter 124, or combinations thereof, based on the measured voltage failing to meet the desired voltage. As an example, based on the voltage measured between the multiresonant therapy converter 124 and converter 120 not meeting the desired voltage, the controller 142 can adjust the operation of the AC / DC power supply 116 and / or converter 120 to adjust the measured voltage to the desired voltage. In another example, the voltage measured between the multiresonant therapy converter 124 and converter 120 meets the desired voltage at that location, but the voltage measured between the multiresonant therapy converter 124 and the first coil 128 may not be the desired voltage at that location within the surgical system 100. Therefore, the controller 142 can adjust the multiresonant therapy converter 124 to adjust the voltage (e.g., waveform, frequency, voltage, current, etc.) between the multiresonant therapy converter 124 and the first coil 124. Thus, the controller 142 can control the waveform supplied to the surgical instrument 104 and maintain the desired characteristics of the waveform.

[0021] Controller 142 can receive feedback signals from first sensing controller 152 and second sensing controller 154. Specifically, sensing controllers 152 and 154 can receive different voltage and current measurements from ammeter 146 and voltmeter 148 positioned between second coil 130 and surgical instrument 104. The measurements received by sensing controllers 152 and 154 can be provided to controller 142 as feedback.

[0022] Furthermore, the sense controllers 152 and 154 can each provide control signals to the relay 134 coupled to the surgical device 104. The first sense controller 152 and the second sense controller 154 can be redundant. Therefore, the control signals of the two sense controllers 152 and 154 can be provided to the logic device 158, which combines the redundant signals to ensure proper operation of the relay 134 and the surgical device 104. The control signals of the sense controllers 152 and 154 can be controlled by the controller 142.

[0023] Figure 2 Examples of at least one aspect of this disclosure are illustrated. Figure 1 The multi-resonance circuit 200 of the multi-resonance therapy converter 124. For the purpose of simplification and explanation, the multi-resonance circuit 200 of the multi-resonance therapy converter 124 may include... Figure 1The surgical system 100 has a first coil 128. However, other embodiments are contemplated in which the multiresonant circuit 200 of the multiresonant therapy converter 124 does not include the first coil 128. The multiresonant circuit 200 of the multiresonant therapy converter 124 may receive a source voltage (Vs) 204 from the corresponding converter 120 of the conversion unit 112. Furthermore, the multiresonant circuit 200 of the multiresonant therapy converter 124 may be coupled to or otherwise include ground 208. The first coil 128 may include a positive terminal 210 and a negative terminal 212.

[0024] The multiresonant circuit 200 also includes multiple parallel branches 216 between Vs 204 and ground 208. Each parallel branch 216 may include a pair of transistors. Each transistor may be a field-effect transistor (FET), or more specifically a metal-oxide-semiconductor FET (MOSFET). Each transistor may have a drain, a source, and a gate. Each transistor is depicted as having a body diode, which is a structure formed between the drain and the source.

[0025] like Figure 2 As shown, each parallel branch 216 may have a high-side transistor 220 positioned adjacent to Vs 204, wherein a given high-side transistor 220 has a drain 222, a source 224, and a gate 226. The drain 222 may be coupled to Vs 204 and the source 224, while the gate 226 may be coupled to the controller 142. Figure 1 The drain 222 may be coupled to the source 224 via a body diode 228. Similarly, each parallel branch 216 may have a low-side transistor 230 having a drain 232, a source 234, a gate 236, and a body diode 238. The drain 232 of the low-side transistor 230 may be coupled to the source 224 of the high-side transistor 220, while the source 234 of the low-side transistor 230 may be coupled to ground 208. The high-side transistor 220 and the low-side transistor 230 may form a given parallel branch 216 or otherwise be part of a given parallel branch.

[0026] As described above, the multiresonant circuit 200 may have multiple parallel branches 216. Specifically, Figure 2The multiresonant circuit 200 provided includes three parallel branches 216, each represented by an integer. For the purpose of simplification, the parallel branch 216 furthest from the first coil 128 may be referred to as the first parallel branch 216(1), the parallel branch 216 closest to the first coil 128 may be referred to as the third parallel branch 216(3), and the parallel branch 216 between the first parallel branch 216(1) and the third parallel branch 216(3) may be referred to as the second parallel branch 216(2). Similarly, components along the corresponding parallel branches 216 may be referred to by the corresponding numbers of the parallel branches 216. For example, the high-side transistor 220 of the first parallel branch 216(1) may be referred to as the first high-side transistor 220(1).

[0027] The transistors in the parallel branches (e.g., high-side transistor 220 and low-side transistor 230) can be controlled by a controller (e.g., Figure 1 The controller 142 is selectively activated to provide an alternating current (AC) voltage to the load (e.g., the first coil 128). Therefore, the voltage supplied to the load by the multiresonant circuit 200 can be a sinusoid with frequency and amplitude. The frequency can be controlled by the controller applying to the switching frequency of the transistor, and the amplitude can be controlled by the controller applying to the duty cycle of the transistor. Therefore, the voltage supplied to the load by the multiresonant circuit 200 can have alternating polarity. Therefore, the surgical instrument 104 ( Figure 1 The device can be bipolar and uses an AC voltage provided by the multiresonant therapy converter 124 to perform the surgical procedure. In other examples, the voltage provided by the multiresonant circuit 200 can be a square wave or a modified sine wave, each square wave or modified sine wave having a voltage for a given surgical instrument (such as surgical instrument 104). Figure 1 The frequency and amplitude of the vibration.

[0028] Furthermore, the multiresonant circuit 200 may have multiple resonant loops 240. A given resonant loop 240 may include reactive components such that the given resonant loop 240 has a resonant frequency. These reactive components may be arranged to select or filter specific frequencies provided by the multiresonant circuit 200. Additionally, a given resonant loop 240 may have an inductor 244 having a first terminal 246 and a second terminal 248. The first terminal 246 of the inductor 244 may be coupled to a parallel branch 216 between its high-side transistor 220 and its low-side transistor 230. More specifically, the first terminal 246 of the inductor 244 may be coupled to a parallel branch 216 between the drain 232 of the low-side transistor 230 and the source 224 of the high-side transistor 220.

[0029] Furthermore, a given resonant circuit 240 may include a capacitor 250 connected in series with the inductor 240. Specifically, the capacitor 250 may have a first terminal 252 that can be coupled to the second terminal 248 of the inductor 240 and a second terminal 254 that can be coupled to the positive terminal 210 of the first coil 128. Therefore, the resonant circuit 240 may be coupled between the parallel branch 216 and the first coil 128. Furthermore, the resonant frequency of the given resonant circuit 240 can be calculated according to the following expression (1): , Among them, "f" r “L” is the resonant frequency of the given resonant circuit 240, “C” is the inductance of the inductor 244, and “C” is the capacitance of the capacitor 250. Therefore, the resonant frequency of the given resonant circuit 240 can be selected based on the inductance and capacitance of the respective inductor 240 and capacitor 250.

[0030] To ensure efficient and stable power conversion, the resonant frequency of the resonant circuit 240 should be matched with the switching frequency of the transistor applied to the multi-resonance therapy converter 124. For example, if the transistor switches at a frequency of 60 Hz, the resonant circuit 240 should be tuned to have a resonant frequency of 60 Hz. Therefore, when the resonant frequency of the resonant circuit 240 is more closely matched with the frequency switching of the multi-resonance therapy converter 124, the impedance of the resonant circuit 240 can be reduced.

[0031] The resonant circuit 240 can be designated by a number corresponding to the corresponding parallel branch 216. For example, the first resonant circuit 240(1) can be coupled to the first parallel branch 216(1). Similarly, the second resonant circuit 240(2) can be coupled to the second parallel branch 216(2). The third parallel branch 216(3) can be coupled to the negative terminal 212 of the first coil 128. More specifically, the negative terminal 212 of the first coil 128 can be coupled to the parallel branch 216(3) between the drain 232(3) of the third low-side transistor 230(3) and the source 224(3) of the third high-side transistor 220(3).

[0032] The first resonant circuit 240(1) may have a resonant frequency of 60 Hz to match the 60 Hz switching frequency supplied to the multi-resonant therapy converter 124. However, the second resonant circuit 240(2) may have a resonant frequency of 50 Hz, such that the second resonant circuit 240(2) has a different (higher) impedance when the multi-resonant therapy converter 124 is operating at a switching frequency of 60 Hz. Therefore, the higher impedance of the second resonant circuit 240(2) compared to the first resonant circuit 240(1) can reduce the output voltage supplied by the multi-resonant therapy converter 124 due to its relatively higher impedance. High power or therapeutic delivery may require voltages of 300 kHz to 480 kHz and pediatric delivery of 400 kHz to 800 kHz, allowing the resonant circuit 240 to be tuned and selected for the desired operation.

[0033] Based on the arrangement of resonant circuit 240 and parallel branch 216, controller 142 ( Figure 1 The resonant circuit 240 can be selected to provide a voltage (e.g., Vs) to the first coil 128. For example, the controller 142 can select the first resonant circuit 240(1) using a first parallel branch 216(1) and a third parallel branch 216(3). As an example of selecting the first resonant circuit 240(1) using the first parallel branch 216(1) and the third parallel branch 216(3), the controller 142 can turn on (activate) the high-side transistor 220(1) of the first parallel branch 216(1) and the low-side transistor 230(3) of the third parallel branch 216(3), while the remaining transistors can be turned off (deactivated). The activation and deactivation of each of these corresponding transistors can be collectively referred to as the first state. In this first state, during half a cycle of the switching frequency of the multi-resonant therapy circuit 124, current can flow from Vs 204 through the high-side transistor 220 (1), the first resonant circuit 240 (1), the first coil 128 and the low-side transistor 230 (3) to ground 208, as will be described in more detail below.

[0034] As another example of using a first parallel branch 216(1) and a third parallel branch 216(3) to select the first resonant circuit 240(1), the controller 142 can turn on (activate) the high-side transistor 220(3) of the third parallel branch 216(3) and the low-side transistor 230(1) of the first parallel branch 216(3), while the remaining transistors can be turned off (deactivated). In this example, the activation and deactivation of each transistor in the transistors can be referred to as the second state. Therefore, during half a cycle of the switching frequency, current can flow from Vs 204 through the high-side transistor 220(3), the first resonant circuit 240(1), the first coil 128, and the low-side transistor 230(1) to ground 208, as will be described in more detail below. The polarity of the voltage (e.g., the output voltage) across the first coil 128 during the first state can be reversed compared to the polarity during the second state. For the purpose of simplifying the explanation, the transients of these transistors between the first state and the second state used to select the first resonant circuit 240(1) can also be collectively referred to as states.

[0035] like Figure 2 As illustrated, the multi-resonant circuit 200 is configured to switch between resonant circuits 240 arranged in parallel. Thus, each resonant circuit 240 can be tuned for an individual resonant frequency, which can be adjusted by a specific selection of inductors 244 and capacitors 250.

[0036] Furthermore, FPGAs and microcontrollers, which may have six or more PWM timer circuits, can be used to control the individual transistors. Therefore, the controller 142 and the multi-resonant therapeutic converter 124 can be used to select among multiple resonant circuits 240 to adjust for various levels of desired output power.

[0037] Furthermore, PWM can use duty cycle to control the output voltage. Duty cycle is a portion of a cycle during which a signal, system, or component (such as a transistor) is active. The duty cycle D can represent a fraction or percentage of the cycle, and it can be the switching frequency of the multi-channel resonant converter 124. A duty cycle of one allows the output voltage to equal the input voltage (e.g., Vs204), while a duty cycle less than one (e.g., 0.5) can cause the output voltage to decrease. A duty cycle between zero and one can introduce harmonic frequencies into the switching frequency (e.g., the fundamental frequency). These harmonic frequencies can be filtered by the resonant circuit 240, which allows the voltage to pass at the switching frequency.

[0038] The first resonant circuit 240(1) may have a resonant frequency associated with a relatively high or “first” power (such as about 100W to 400W), for example, which may be usable by the controller 142 during a therapeutic delivery operation. The second resonant circuit 240(2) may have a resonant frequency associated with a relatively low or “second” power (e.g., about 50W or less) less than the first power, which may be usable by the controller 142 during a pediatric delivery operation. The controller 142 may employ a first parallel branch 216(2) and a third parallel branch 216(3) to select the second resonant circuit 240(2).

[0039] Considering that therapeutic and pediatric delivery procedures may operate on different tissues with different impedances requiring different power levels, the switching frequency may be affected and reduce the effectiveness of a given resonant circuit 240. By using the multiresonant circuit 200 for the multiresonant therapy converter 124, the multiresonant therapy converter 124 can allow associated surgical systems (e.g., surgical system 100) to be integrated with the multiresonant therapy converter 124. Figure 1 Multiple operations can be performed using different resonant circuits 240 to ensure safe and efficient operation. For example, a lower or "first" switching frequency at a higher or "first" resistance can reduce switching losses and improve efficiency, while a higher or "second" switching frequency at a relatively lower or "second" resistance less than the first resistance may benefit a more dynamic response and reduced harmonic distortion.

[0040] Figure 3A A clutch circuit 300 of a multi-resonance therapy converter 124 according to at least one aspect of the present disclosure is illustrated. The clutch circuit 300 may be similar in some respects to Figure 2 The multi-resonant circuit 200, and therefore can be best understood by referring to it, where similar figures will correspond to similar components which will not be described in detail again.

[0041] The clutch circuit 300 may include a clutch resistor 304 positioned in parallel with the first coil 128. The clutch resistor 304 may have a first terminal 306 coupled to the positive terminal 210 of the first coil 128 and a second terminal 308 coupled to the negative terminal 212 of the first coil 128. The clutch resistor 304 can help stabilize the voltage on the first coil 128 by reducing voltage fluctuations on the first coil 128, thereby providing a stable supply to the surgical instrument 104. Figure 1 The voltage of the first coil 128 is reduced. Furthermore, the clutch resistor 304 can share current with the first coil 128, thereby reducing the total current flowing through the first coil 128 and extending the voltage between the first coil 128 and the surgical instrument 104. Figure 1The clutch resistor 304 can suppress oscillations and reduce resonance effects in AC circuits such as clutch circuit 300, which can improve the overall stability and performance of clutch circuit 300.

[0042] The clutch circuit 300 may also include a reactive clutch component. For example, such as Figure 3A As illustrated, the clutch circuit 300 may include a clutch capacitor 312 coupled in parallel to the first coil 128. The clutch capacitor 312 may have a first terminal 314 coupled to the positive terminal 208 of the first coil 128 and a second terminal 316 coupled to the negative terminal 210 of the first coil 128. The clutch capacitor 312 can filter out high-frequency noise and smooth voltage fluctuations. The clutch capacitor 312 can also store and release energy to maintain a stable (uniform) voltage across the first coil 128, which can smooth ripple voltage. The clutch capacitor 312 can also reduce the total reactive power in the clutch circuit 300 by compensating for inductive loads, thereby improving the efficiency of the clutch circuit 300.

[0043] The clutch circuit 300 may include a clutch inductor 320 coupled in parallel to the first coil 128. The clutch inductor 320 may have a first terminal 322 coupled to the positive terminal 208 of the first coil 128 and a second terminal 324 coupled to the negative terminal 210 of the first coil 128. The clutch inductor 320 may reduce low-frequency interference and stabilize the current through the first coil 128. The clutch inductor 320 may also be used to select or reject specific frequencies to tune the reactance of the first coil 128. The clutch inductor 320 may also temporarily store energy to protect the first coil 128 from sudden voltage changes. The clutch inductor 320 may also reduce the reactance of the first coil 128 to facilitate the interaction between the first coil 128 and a load (e.g., surgical instrument 104). Figure 1 Impedance matching between ()).

[0044] The clutch components of the clutch circuit 300 can be used to enhance the overall performance of the multi-treatment resonant converter 124 by providing stabilization, filtering, impedance matching, and protection. These clutch components can optimize the load (e.g., surgical instrument 104) by minimizing reflections from the load. Figure 1 Power transfer is achieved through impedance matching.

[0045] The impedance of the load can change in response to a particular surgical instrument 104 and the operation performed by the surgical instrument 104 represented by the load. Therefore, each clutch component in the clutch assembly can be coupled in series with a solid-state relay (SSR) 330, which can be a three-terminal bidirectional thyristor switching element or another similar controllable electrical component.

[0046] like Figure 3AAs illustrated, the second terminal 308 of the clutch resistor 304 can be coupled to the first terminal 332 of the first SSR 330, and the second terminal 334 of the first SSR 330 can be coupled to the negative terminal 210 of the first coil 128. The clutch capacitor 312 and the clutch inductor 320 can be similarly coupled to their respective second and third SSRs 300. The SSR 330 can be controlled by the controller 142 (… Figure 1 The clutch mechanism is "disconnected" and "connected" to control the impedance of the clutch component and the first coil 128 to match the impedance of the load, which can be changed during operation.

[0047] Figure 3B A composite waveform 350, measurable across the clutch inductor 320 of the clutch circuit 300, is illustrated. Waveform 350 includes a first holding current 354 and a second holding current 358 that are constant or at least substantially constant. The first holding current 354 is of a first polarity (e.g., positive), and the second holding current 358 is of a second polarity opposite to the first polarity (e.g., negative). These holding currents 354 and 358 can allow three-terminal bidirectional thyristor switching elements (such as those in the clutch circuit 300) to... Figure 3A The SSR 330 is turned on (activated) and turned off (deactivated), and remains in an on state after being turned on. The composite waveform 350 may also include a power supply waveform 362 characterizing the voltage provided by the parallel branch 216 of the multi-resonance therapy converter 124. The composite waveform 350 may also include an output voltage 366 measured across the clutch inductor 320. The output voltage 366 and the power supply waveform 362 may be sinusoidal signals with two full-wave cycles 370, wherein each full-wave cycle 370 includes a first half-wave cycle 374 and a second half-wave cycle 378.

[0048] As previously mentioned, the half-wave cycle of the switching frequency can have an associated duty cycle, which defines the amount of time the corresponding transistor is active to control the voltage. Similarly, the SSR 330 can be controlled by the controller 142 ( Figure 1 This is activated to perform phase control of the voltage supplied to the first coil 128. For example, refer to... Figure 3ASSR 330 can be activated after a first time period T1, which begins at the start of the first half-wave cycle 374. At the end of the first time period T1, SSR 330 can be activated and can provide voltage (e.g., supply waveform 362) until it drops below the first holding current 354. At the beginning of the second half-wave cycle 378, the second time period T2 can pass. SSR 330 can not be reactivated until the end of the second time period T2. At the end of the second time period T2, SSR 330 can be activated until the supply waveform 362 drops below the second holding current 358. When SSR 330 is activated, inductor 320 and SSR 330 conduct current to reduce the isolation transformer 132 ( Figure 1 ) magnetized inductance.

[0049] Figure 4 It is the N-channel circuit 400 of the multi-resonance therapy converter 124 according to at least one aspect of this disclosure. The N-channel circuit 400 may be similar in some aspects to Figure 2 Multiresonant circuit 200 and Figure 3A The clutch circuit 300, and therefore can be best understood by referring to it, where similar numbers will correspond to similar components that will not be described in detail again.

[0050] The N-channel circuit 400 can have N+1 parallel channels 216, where N corresponds to the number of resonant circuits 240 within the N-channel circuit 400, while a parallel branch 216 (e.g., N+1 parallel branches) may not have a corresponding resonant circuit. N can be any suitable integer, such as two, three, four, five, or six. As an example, an N-channel circuit 400 where "N" equals two can be compared with... Figure 2 The multi-resonant circuit provided in the paper is the same as or substantially the same as the one in the 200.

[0051] Similar to multi-resonant circuit 200 ( Figure 2 The resonant circuit 240 of the N-channel circuit 400 can be coupled to the parallel branch 216. For example, with the multi-resonant circuit 200 ( Figure 2 Different, such as Figure 4 As illustrated, the third resonant circuit 240(3) can be coupled to the third parallel branch 216(3) between the drain 232(3) of the third low-side transistor 230(3) and the source 224(3) of the third high-side transistor 220(3).

[0052] In the N-channel circuit 400 and the multi-resonant circuit 200 ( Figure 2In the first coil 128, the last parallel branch 216 (e.g., the parallel branch 216 closest to the first coil 128) may be coupled to the negative terminal 210 of the first coil 128. However, other embodiments are contemplated in which any of the parallel branches 216 may be coupled to the negative terminal 210 of the first coil 128 instead of the parallel branch 216 closest to the first coil 128 (such as the first parallel branch 216(1)).

[0053] As previously mentioned Figure 2 The multi-resonant circuit 200 discussed here can be considered as an N-channel circuit in which “N” equals two, employing a first resonant circuit 240(1) during therapeutic delivery operations and a second resonant circuit 240(2) during pediatric delivery operations. That is, “N” can correspond to the circuit that can be delivered by a surgical instrument (e.g., surgical instrument 104 ( Figure 1 The number of different operations performed. Therefore, the N-channel circuit 400 can provide N resonant circuits 240(1) to 240(N), which can be connected to the surgical instrument 104 ( Figure 1 The N different operations performed are related.

[0054] The switching frequency of circuit 400 can respond to the surgical instrument 104 ( Figure 1 The switching frequency of circuit 400 may change due to the operations performed. For example, the switching frequency of circuit 400 may need to be changed (regulated) by controller 142 based on changes in the load on circuit 400, such as changes in the impedance of the tissue operated by surgical instrument 104. During a treatment delivery operation, surgical instrument 104 may be used to cut one or more types of tissue (e.g., muscle, fat, connective tissue), each of which may have different impedances. Furthermore, the surface area of ​​the tissue in contact with surgical instrument 104 may change during the operation, which can also change the impedance of the tissue. Movement of surgical instrument 104, operational settings (e.g., cutting, coagulation, blending, etc.), electrode conditions, and patient factors (such as body composition and hydration level) can also cause changes in impedance. Changes in impedance (e.g., resistance, inductance, capacitance) may require different switching frequencies of circuit 400 to ensure that circuit 400 can handle the varying power demands of surgical instrument 104. Tissue impedance can cause current hysteresis, thus requiring adjustment of the switching frequency to maintain efficiency and performance.

[0055] Although the resistance of the tissue may change during the procedure, it may be desirable to maintain, or at least substantially maintain, the resistance applied to the surgical instrument 104. Figure 1 The desired power. For example, it might be desirable to deliver 200W to a surgical instrument during a therapeutic delivery operation. When using an N-channel circuit 400 ( Figure 2When the treatment delivery operation is performed, a first resonant circuit 240(1) may be used, which may have a resonant frequency associated with Vs at a relatively high voltage (e.g., 100W to 400W) associated with the treatment delivery operation.

[0056] During the treatment delivery operation, the impedance of the tissue can change, as discussed above. Therefore, the first resonant circuit 240(1) may no longer resonate with the switching frequency of the N-channel circuit 400. Thus, for the example above, due to the change in switching frequency, the power applied to the surgical instrument 104 can decrease to below the desired 200W level. The frequency change can be controlled by one or more sensing controllers 152, 154 (…). Figure 1 ) measurement. In some implementations, the ammeter 146 ( Figure 1 ) and / or voltmeter 148 ( Figure 1 The device can be a digital multimeter (DMM) or a device capable of measuring multiple electrical parameters, including frequency. The measured frequency can be provided as a feedback signal to the controller 142. Additionally, voltage and current can be provided as feedback signals to the controller 142, which may be influenced by the frequency of the N-channel circuit 400 and the resonant frequency of the resonant circuit 240.

[0057] Based on the variation in tissue impedance, in the example above, the output power can drop to 100W, which is lower than the expected output power (200W) supplied to the surgical instrument 104 in this example. Based on this variation, the controller 142 can employ a different resonant circuit 240, such as a third resonant circuit 216(3), which can have a resonant frequency closer to the frequency of the N-channel circuit 400 compared to the first resonant circuit 216(1), thereby allowing the power delivered to the surgical instrument 104 to return to the expected power. Therefore, the N-channel circuit 400 can be used to operate the surgical instrument 104 effectively and safely during operation.

[0058] Multiple resonant circuits 240 of the N-channel circuit 400 can be selected and simultaneously actuated to provide the desired power to the surgical instrument 140. That is, the multi-resonant therapeutic converter 124 can employ two or more resonant circuits 240 to generate an output signal that is a combination of signals output from two or more resonant circuits 240. As an example, the first resonant circuit 240(1) can resonate at a switching frequency, thereby providing minimal impedance to the current (e.g., a signal) passing through the first resonant circuit 240(1). The second resonant circuit 240(2) can be tuned to a frequency different from the resonant and switching frequency of the first resonant circuit 240(1), such that the second resonant circuit 240(2) can provide impedance to the signal. Although the second resonant circuit 240(2) may not resonate as strongly as the first resonant circuit 240(1), the second resonant circuit 240(2) can still affect the overall signal experienced by the first coil 128. For example, the second resonant circuit 240(2) can provide distortion or modulation to the output signal experienced by the first coil 128, although the signal provided by the first resonant circuit 240(1) will contribute more than the signal provided by the second resonant circuit 240(2). However, the second resonant circuit 240(2) can provide a damping effect on the transient output signal to obtain the signal required for a particular surgical instrument 104 and its operation. In another example, the combined signal can be generated by two or more multi-resonant therapy converters 124, such as a combination of multi-resonant circuit 200 and N-channel circuit 400. In other examples, the multi-therapy converter 124 can be a multi-level inverter that uses two or more resonant circuits 240 to generate the combined signal.

[0059] In view of the above structural and functional characteristics, refer to Figures 1 to 4 This will help you better understand the example method. Although, for the purpose of simplifying the explanation, Figure 5 The example methods are shown and described as being executed sequentially; however, it should be understood and appreciated that this example is not limited to the illustrated order, as in other examples, some actions may occur in a different order, multiple times, and / or concurrently than those shown and described herein. Furthermore, it is not necessary to execute all described actions to implement a method, and conversely, some actions omitted from the description may be performed.

[0060] Figure 5 This is a schematic flowchart of an example method 500 for controlling the power delivered to a surgical instrument using a multi-resonance therapy transducer, according to at least one aspect of this disclosure. Method 500 can be controlled by a controller 142 (…). Figure 1 ) to achieve. Therefore, in addition to Figure 5 In addition, you can refer to Figures 1 to 4 .

[0061] Method 500 may include determining the operation to be performed using the surgical instrument, as at step 502. For example, at step 502, controller 142 may receive input from a user indicating a desired operation (such as a therapeutic delivery operation or a pediatric delivery operation) to be performed using the surgical instrument 104.

[0062] Method 500 may also include applying a voltage, as at step 504. For example, at step 504, controller 142 may allow voltage to be supplied to conversion unit 112 via power source 108. More specifically, controller 142 may operate means of conversion unit 112 (e.g., AC / DC power supply 116, converter 120, and multi-therapeutic resonant converter 124) to supply power to surgical instrument 104, as described elsewhere herein.

[0063] Method 500 may also include selecting a resonant circuit, as at step 506. For example, at step 506, controller 112 may select resonant circuit 240 of the multiple therapy converter 124 to provide power to surgical instrument 104 corresponding to the operation determined at step 502. For example, the controller may select the first resonant circuit 240(1) by supplying power to the “on” and “off” transistors of the first parallel branch 216(1) associated with the first resonant circuit 240(1) and the transistor associated with the last parallel branch 216(N+1), as described elsewhere herein. The operation selected at step 502 may be associated with a specific resonant circuit. For example, the first resonant circuit 240(1) may be associated with a treatment operation. Furthermore, the selection of resonant circuit 240 at step 506 may be performed simultaneously by controller 142 and by controlling the power supply of converter unit 112 at step 504.

[0064] Method 500 may also include receiving feedback at the conversion unit, as at step 508. For example, at step 508, controller 142 may receive feedback from conversion unit 112. More specifically, controller 142 may receive feedback (e.g., voltage and / or current measurements) from ammeter 146 and voltmeter 148, such as those located between at least multi-resonance therapeutic converter 124 and converter 120.

[0065] Method 500 may further include determining whether the measured voltage is a desired voltage, as at step 510. For example, at step 510, controller 142 may determine whether the voltage measured at step 508 is at a desired voltage level corresponding to the operation determined at 502. The desired voltage level for the corresponding operation may be stored in the memory of controller 142 and may be retrieved by controller 142, such as at, during, or before step 510. Controller 142 may compare the measured voltage with the desired voltage to determine whether the measured voltage is at the desired voltage or within an acceptable threshold of the desired voltage.

[0066] Based on the controller 142 determining at step 510 that the desired voltage level was not measured, method 500 may proceed along the "No" branch to step 512, where the controller 142 may adjust the conversion unit 112 to meet the desired voltage level. Therefore, steps 508 to 512 may be repeated until the desired voltage level is met at step 508. It should be noted that the voltage measured at step 508 may characterize the voltage before reaching the multi-therapy resonant converter 124. Therefore, the controller 142 may adjust the AC / DC power supply 116 and the converter 120 at step 512 to regulate the voltage. This voltage level may correspond to Vs 204 of the multi-therapy converter 124.

[0067] Based on the controller 142 determining that the desired voltage level was measured at step 510, method 500 may proceed along the "yes" branch to step 514, where the controller 142 may receive feedback from measured voltage and current (e.g., power) from ammeter 146 and voltmeter 148 positioned between at least the multi-resonant therapeutic transducer 124 and the surgical instrument 104. Furthermore, the feedback received at step 514 may also come from one or more of the sensing controllers 152, 154.

[0068] Method 500 may also include determining whether the measured voltage is a desired voltage, as at step 516. For example, at step 516, controller 142 may determine whether the measured voltage is at a desired voltage level by comparing the voltage (e.g., power) delivered to surgical instrument 104 with a desired voltage level.

[0069] Based on the controller 142's determination that the desired voltage level was not measured at step 516, method 500 may proceed along the "No" branch to step 518, where the controller 142 may select another resonant circuit 240. For example, the surgical instrument 104 may not operate at a frequency or impedance that results in the resonant frequency of the first resonant circuit 240 (1), which may have been selected at step 506. Therefore, at step 518, the controller 142 may select another resonant circuit 240, such as a third resonant circuit 240 (3), having a resonant frequency that allows power to be delivered at the desired level.

[0070] Based on the controller 142's determination that the voltage measured at step 514 is the same as or substantially similar to the expected voltage at step 516, method 500 may proceed along the "yes" branch to step 520, where the controller 142 may deliver the determined operation, as determined at step 502.

[0071] Method 500 may further include determining whether the determined operation has been completed, as at step 522. For example, controller 104 may determine whether the determined operation has been completed by receiving a signal characterizing the termination of the operation from the surgical instrument. Alternatively, controller 142 may determine the completion of the determined operation based on received voltage and / or current measurements.

[0072] Based on the controller 142's determination at step 522 that the operation is not yet complete, the operator or user may continue operating the surgical instrument 104. Furthermore, method 500 may return along the "No" branch to step 514 to measure the voltage supplied to the surgical instrument 104, and subsequently determine at step 516 whether the voltage supplied to the surgical instrument 104 continues at the desired level. For example, during step 520, the impedance of the tissue may change in response to the delivery operation. Therefore, the frequency of the circuit 400 of the multi-resonant therapeutic converter 124 may be different from that of the third resonant converter 240 (3), which may have been selected at step 518 in a previous iteration of method 500. The voltage measured at step 514 may also be determined to be different from the desired voltage level at step 516 in the current iteration. Therefore, the controller 142 may select another available resonant circuit 240 at step 518, such as the first resonant circuit 240 (1) or the fourth resonant circuit 240 (4), as an example.

[0073] Based on the controller 142's determination at step 522 that the operation has been completed, the controller 142 may proceed along the "yes" branch to step 524 to determine if another operation is required. For example, the controller 142 may receive feedback characterizing user input indicating the selection of another operation, similar to what was done at step 502. Based on the received user input, method 500 may return to step 502 and determine the operation to be performed using the multi-resonance therapy transducer 124 and surgical instrument 104. For example, the user may decide to use surgical instrument 104 to cut softer tissue relative to the tissue cut during the therapy delivery operation. Thus, the user may utilize pediatric delivery or soft tissue manipulation with surgical instrument 104, which requires a lower voltage compared to therapy delivery operations, as discussed elsewhere herein. Therefore, the user may provide input to the controller 142 at steps 524, 502, instructing pediatric delivery or soft tissue manipulation with surgical instrument 104. Based on this input, method 500 can be performed again using the same controller 142, multi-resonance therapy transducer 124, and surgical instrument 104, as described above.

[0074] Based on receiving input from the user at step 524, failing to receive input after a predetermined time amount at step 524, or determining that power source 108 has been turned off (power off), method 500 may proceed along the "No" branch to step 526, at which step controller 142 may terminate method 500.

[0075] Therefore, the aforementioned system can be used to provide a stable and effective voltage to surgical instruments. The aforementioned system (e.g., a circuit) is controllable to select the resonant circuit according to the needs of the surgical instruments required during various operations. The circuit may have different frequencies based on the switching frequency and duty cycle used to provide specific voltages for different operations, which results in a voltage drop in existing systems. This voltage drop is prevented by selecting another resonant circuit that resonates at the frequency corresponding to the operation of the surgical instruments.

[0076] The implementation plan disclosed in this article includes:

[0077] A. A multi-resonance therapy converter, comprising: N+1 branches coupled to a voltage source and ground, each branch including two transistors; and N resonant circuits, each resonant circuit coupled to a corresponding branch and a coil in the N+1 branches, wherein the coil is further coupled to one of the branches in the N+1 branches.

[0078] B. A surgical system comprising: a surgical instrument operable to perform a first operation and a second operation; a multi-resonance therapy transducer including a first resonant circuit associated with the first operation and a second resonant circuit associated with the second operation; and a controller operable to selectively power the surgical instrument using the first resonant circuit and the second resonant circuit.

[0079] C. A method comprising: determining, by a controller, an operation to be performed with a surgical instrument; applying current to the surgical instrument via a first resonant circuit based on the determined operation; receiving, by the controller, an input indicating a voltage to be applied to the surgical instrument; and applying current to the surgical instrument via a second resonant circuit based on the received input.

[0080] Each of embodiments A through C may have any combination of one or more of the following additional elements: Element 1: wherein the two transistors comprise: a high-side transistor coupled to the voltage source; and a low-side transistor coupled to the high-side transistor and ground. Element 2: wherein at least one of the N resonant circuits comprises: an inductor coupled to at least one of the source of the high-side transistor and the drain of the low-side transistor; and a capacitor coupled to the inductor and the coil. Element 3: wherein at least one of the high-side transistor or the low-side transistor includes a gate operable to receive a control signal. Element 4: wherein the N resonant circuits include a first resonant circuit and a second resonant circuit, wherein the first resonant circuit conducts current based on the high-side transistor and the low-side transistor being in a first state.

[0081] Element 5: The second resonant circuit avoids conducting current based on the high-side transistor and the low-side transistor being in the first state. Element 6: The second resonant circuit conducts current based on the high-side transistor and the low-side transistor being in the second state; and the first resonant circuit avoids conducting current. Element 7: The N resonant circuits further include a third resonant circuit, which conducts current based on the high-side transistor and the low-side transistor being in the third state. Element 8: The first resonant circuit and the second resonant circuit avoid conducting current based on the high-side transistor and the low-side transistor being in the third state. Element 9: It also includes a clutch component coupled in parallel to the coil. Element 10: The clutch component includes a clutch inductor.

[0082] Element 11: Further includes a clutch capacitor coupled in parallel to the coil and the clutch inductor. Element 12: Further includes a clutch resistor coupled in parallel to the coil, the clutch inductor, and the clutch capacitor. Element 13: Further includes a solid-state relay (SSR) coupled in series with the clutch component. Element 14: The controller is operable to receive an input indicating the voltage applied to the multi-resonance therapy converter. Element 15: The controller is operable to receive an input indicating the voltage applied to the surgical instrument. Element 16: The multi-resonance therapy converter further includes a third resonant circuit, and the controller is operable to: detect a frequency change in the voltage applied to the surgical instrument during the execution of the first operation; and power the surgical instrument using the third resonant circuit based on the change. Element 17: Further includes: the controller detecting a frequency change in the voltage applied to the surgical instrument during the execution of the operation; and applying current through the third resonant circuit based on the change.

[0083] As a non-limiting example, exemplary combinations applicable to A through C include: element 1 and element 2; element 2 and element 3; element 1 and element 4; element 4 and element 5; element 4 and element 6; element 4 and element 7; element 7 and element 8; element 3 and element 9; element 9 and element 10; element 10 and element 11; element 11 and element 12; element 9 and element 13; and element 15 and element 16.

[0084] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein, for example, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the / described” include plural references. It should also be understood that the terms “containing,” “comprising,” and / or “including,” and variations thereof, when used in this specification, specify the presence of the stated feature, integer, step, operation, element, and / or component, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0085] The directional terms used herein are for convention and reference purposes only and should not be construed as restrictive. However, it should be recognized that these terms may be used by operators or users. Therefore, no implied or inferred limitations are made. Furthermore, ordinal numbers (e.g., first, second, third, etc.) are used for distinction rather than counting. For example, the use of “third” does not imply the existence of a corresponding “first” or “second”. Additionally, if used herein, the terms “coupled” or “coupled to” or “connected” or “attached” or “attached to” may indicate the establishment of a direct or indirect connection, and are not limited to either, unless expressly so cited.

[0086] While several exemplary embodiments have been described in this disclosure, those skilled in the art will understand that various changes can be made and elements can be substituted with equivalents without departing from the spirit and scope of the invention. Furthermore, those skilled in the art will understand that many modifications will be made to adapt particular apparatus, situations, or materials to embodiments of this disclosure without departing from its essential scope. Therefore, the invention is not limited to the specific embodiments disclosed, or the best mode contemplated for carrying out the invention, but rather will include all embodiments falling within the scope of the appended claims. Moreover, references in the appended claims to a means or system adapted to be, arranged to be, capable of, configured to be, enabled to, operable to, or operated to perform a particular function cover that means, system, or component, regardless of whether it is so adapted, arranged, capable of, configured, enabled, operable, or operated.

Claims

1. A multi-resonance therapy transducer, comprising: There are N+1 branches, each of which is coupled to a voltage source and ground, and each branch includes two transistors. and There are N resonant circuits, each resonant circuit being coupled to a corresponding branch and a coil in the N+1 branches, wherein the coil is further coupled to one of the branches in the N+1 branches.

2. The multi-resonance therapy converter according to claim 1, wherein, The two transistors include: High-side transistor, the high-side transistor being coupled to the voltage source; and A low-side transistor, which is coupled to the high-side transistor and ground.

3. The multi-resonance therapy converter according to claim 2, wherein, At least one of the N resonant circuits includes: An inductor, the inductor being coupled to at least one of the source of the high-side transistor and the drain of the low-side transistor; and A capacitor, which is coupled to the inductor and the coil.

4. The multi-resonance therapy converter according to claim 3, wherein, At least one of the high-side transistor or the low-side transistor includes a gate operable to receive a control signal.

5. The multi-resonance therapy converter according to claim 2, wherein, The N resonant circuits include a first resonant circuit and a second resonant circuit, wherein the first resonant circuit conducts current based on the high-side transistor and the low-side transistor being in a first state.

6. The multi-resonance therapy converter according to claim 5, wherein, The second resonant circuit avoids conduction current based on the high-side transistor and the low-side transistor being in the first state.

7. The multi-resonance therapy converter according to claim 5, wherein, Based on the fact that the high-side transistor and the low-side transistor are in the second state: The second resonant circuit conducts current; and The first resonant circuit avoids conduction current.

8. The multi-resonance therapy converter according to claim 5, wherein, The N resonant circuits also include a third resonant circuit, which conducts current based on the high-side transistor and the low-side transistor being in a third state.

9. The multi-resonance therapy converter according to claim 8, wherein, The first resonant circuit and the second resonant circuit avoid conduction current based on the high-side transistor and the low-side transistor being in the third state.

10. The multi-resonance therapy converter according to claim 4, further comprising a clutch component coupled in parallel to the coil.

11. The multi-resonance therapy transducer according to claim 10, wherein, The clutch component includes a clutch inductor.

12. The multi-resonance therapy converter according to claim 11, further comprising a clutch capacitor coupled in parallel to the coil and the clutch inductor.

13. The multi-resonance therapy converter according to claim 12, further comprising a clutch resistor coupled in parallel to the coil, the clutch inductor and the clutch capacitor.

14. The multi-resonance therapy converter of claim 10, further comprising a solid-state relay (SSR) coupled in series with the clutch component.

15. A surgical system comprising: Surgical instruments, said surgical instruments being operable to perform a first operation and a second operation; A multi-resonance therapy converter, the multi-resonance therapy converter including a first resonant circuit associated with the first operation and a second resonant circuit associated with the second operation; and A controller capable of operating to selectively power the surgical instrument using the first resonant circuit and the second resonant circuit.

16. The surgical system of claim 15, wherein, The controller is operable to receive an input indicating the voltage to be applied to the multi-resonance therapy converter.

17. The surgical system of claim 15, wherein, The controller is operable to receive an input indicating the voltage to be applied to the surgical instrument.

18. The surgical system of claim 17, wherein, The multi-resonance therapy transducer further includes a third resonant circuit, and wherein the controller is operable to: Detecting the frequency change of the voltage applied to the surgical instrument during the execution of the first operation; and Based on the aforementioned changes, the surgical instrument is powered using the third resonant circuit.

19. A method comprising: The controller determines the procedure to be performed using surgical instruments; Based on the determined operation, current is applied to the surgical instrument through the first resonant circuit; The controller receives an input indicating the voltage to be applied to the surgical instrument; as well as Based on the received input, current is applied to the surgical instrument through a second resonant circuit.

20. The method of claim 19, further comprising: The controller detects the frequency change of the voltage applied to the surgical instrument during the execution of the operation; as well as Based on the aforementioned change, a current is applied through the third resonant circuit.

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