SCANNING, SELECTION AND SELF-ADJUSTMENT SYSTEM OF RESONANCES FOR RESONANT VARIABLE FREQUENCY INVERTERS USED IN MAGNETIC THERMOTHERAPY

The present disclosure is related to a scanning, selecting and self-adjusting system of resonances for resonant variable frequency inverters used in magnetic thermotherapy that allows automatically find the resonance frequencies of hybrid resonant inverters. This scanning uses a set of interconnecte...

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Hauptverfasser: Mario Eduardo CANO GONZÁLEZ, Alfonso HERNÁNDEZ SÁMANO, Ernesto Edgar MAZÓN VALDEZ
Format: Patent
Sprache:eng ; spa
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Zusammenfassung:The present disclosure is related to a scanning, selecting and self-adjusting system of resonances for resonant variable frequency inverters used in magnetic thermotherapy that allows automatically find the resonance frequencies of hybrid resonant inverters. This scanning uses a set of interconnected electronic modules, such as the linear voltage ramp generator module (10) connected to a multi-range phase anchor module (20) consisting of multiple PLL-type circuits (201) in parallel. This is controlled from a frequency band selector module (30) using a direct current sensor (60) connected to a microcontroller (301) that records the current peaks supplied to a resonant inverter (40) from a DC source (50). Once the system or the user selects from a touch screen (301) a resonant frequency through the selector module, the multi-range phase anchor module (20) compares the phases of a signal from one terminal in an inverter (71) and another in the resonator (71'). The anchor module dynamically establishes and compensates the resonance frequency in operation of the resonant inverter in the event of possible variations in the resonant load. The signals are previously electronically conditioned using two signal detector and conditioner modules (70) and (70'), formed by transformers (701), trimming diodes (703), voltage comparators (705), half wave rectifiers (707) and logic gates (709), (709'). Sistema de escaneo, selección y autoajuste de resonancias para inversores resonantes de frecuencia variable utilizados en termoterapia magnética descrito, permite encontrar automáticamente las frecuencias de resonancia de los inversores resonantes híbridos; este escaneo usa un conjunto de módulos electrónicos interconectados, como el módulo generador de rampa lineal de voltaje (10) conectado a un módulo anclador de fase multi-rango (20) conformado de múltiples circuitos tipo PLL (201) en paralelo, controlados desde un módulo selector de bandas de frecuencias (30) usando un sensor de corriente directa (60) conectado a un microcontrolador (301) que registra los picos de corriente suministrados a un inversor resonante (40) desde una fuente de DC (50); una vez que el sistema o el usuario seleccionan desde una pantalla táctil (301) una frecuencia de resonancia, a través del módulo selector, el módulo anclador de fase de multi-rango (20) comprara las fases de una señal provenientes de una terminal en un inversor (71) y otra en el resonador (71'), así dicho módulo anclador establece