RU-2861393-C1 - CONTROL SYSTEM FOR INDUCTION HEATER

RU2861393C1RU 2861393 C1RU2861393 C1RU 2861393C1RU-2861393-C1

Abstract

FIELD: electric power industry; electrical engineering. SUBSTANCE: invention relates to a control system for an induction heater. The technical result is achieved due to the fact that the control system for an induction heater comprises a thyristor regulator for the operation of thyristor modules for controlling the induction load, connected to the induction heater and to a voltage filter; interface relays for monitoring the heater status 'operating' or 'fault', interface relays for monitoring the heater status 'operating' or 'emergency', interface relays for remote switching on and off of the heater in case of fire, interface relays for remote switching on and off of the circulation pump and the heater, a circuit breaker for the heater, an emergency shutdown button for the heater, connected to the induction heater; a circuit breaker for the heater cooling fan and an intermediate relay for switching on and off the heater cooling fan, connected to the heater cooling fan; a cabinet cooling fan with a cabinet cooling thermostat connected to it for switching on the fan; a circuit breaker for the circulation pump; a circuit breaker for the induction heater control devices; a circuit breaker for the induction heater control circuits; a switch for switching on the pump and the heater; a local/remote control mode switch. The thyristor regulator for the operation of the thyristor modules includes a synchronisation and calculation unit connected to a power setpoint, connected to a controller for monitoring temperature and regulating the heater power, controlling the thyristor and a feedback unit. The circuit breaker for the circulation pump is connected via a contactor for switching the operation of the circulation pump to the pump, connected to an intermediate relay for switching on and off the contactor of the circulation pump. EFFECT: increasing the reliability of operation of the induction heater. 4 cl, 3 dwg

Inventors

Ermochenko Aleksandr Vladimirovich
BARDOKIN VLADISLAV ALEKSANDROVICH
BRAGIN ALEKSANDR NIKOLAEVICH

Dates

Publication Date: 20260505
Application Date: 20251006

Claims (4)

1. An induction heater control system comprising a thyristor controller for the operation of thyristor modules for regulating the induction load connected to the induction heater and to a voltage filter, including a synchronization and calculation unit connected to a power setter connected to a controller for monitoring the temperature and regulating the heater power, a control thyristor and a feedback unit; an interface relay connected to the induction heater for monitoring the heater states "operation" or "malfunction", an interface relay for monitoring the heater states "operation" or "emergency", an interface relay for remotely turning on and off the heater in the event of a fire, an interface relay for remotely turning on and off the circulation pump and heater, an automatic heater switch, an emergency switch for the heater; an automatic switch for the heater cooling fan and an intermediate relay for turning on and off the heater cooling fan, connected to the heater cooling fan; a system cooling fan with a system cooling thermostat connected to it with the ability to turn on the fan; Automatic circuit breaker of the circulation pump, connected through the contactor for switching the operation of the circulation pump to the pump, connected to the intermediate relay for switching on and off the contactor of the circulation pump; automatic circuit breaker of the control devices of the induction heater, automatic circuit breaker of the control circuits of the induction heater, switch for switching on the pump and heater, switch of local and remote control modes.
2. A control system for an induction heater according to paragraph 1, characterized in that the thyristor controller for the operation of the thyristor modules for regulating the induction load is connected to the heater operation indicator with the ability to turn it on and regulate it.
3. A control system for an induction heater according to paragraph 1, characterized in that the automatic switch of the heater includes an independent release for emergency shutdown of the heater, connected to an interface relay for monitoring the states of the heater “operation” or “emergency” and an interface relay for remotely turning on and off the heater in the event of a fire.
4. The control system for an induction heater according to claim 1, characterized in that the controller for monitoring the temperature and regulating the power of the heater is connected to a PID controller and automatic adjustment of the controller for setting optimal coefficients for precise operation of the PID controller.

Description

The invention relates to the field of electric power engineering and electrical engineering, in particular, to a control system for an induction heater. A closed-loop cooling system is known in the art, including a heat-dissipating component within the housing and coexisting with multiple electronic components within the housing. The electronic components, including first and second inverter modules, are arranged parallel to each other to further reduce the heat generated within the housing. The housing also houses a bipolar transistor module, a linear reactor power filtering device, and a closed-loop cooling system. US Patent No. 10743376, published August 11, 2020. A cabinet equipped with a thyristor controller controlling an electric heating contactor, which can regulate the heater's power, is known. The cabinet is equipped with a control switch group for electrical connection to motors, heaters, supply and exhaust fan contactors electrically connected to the control switch group, a thyristor controller for controlling the electric heating contactor, a temperature control module, and a remote network control unit. Chinese Patent No. 102401807, published October 3, 2023. The objective of the claimed invention is to create a control system for an induction heater that ensures the safety and reliability of the heater. The technical result of the claimed invention consists in increasing the reliability of the induction heater, increasing its safety, and energy saving. The claimed technical result is achieved due to the fact that the induction heater control system contains a thyristor controller for the operation of thyristor modules for regulating the induction load connected to the induction heater and to the voltage filter, including a synchronization and calculation unit connected to a power setter connected to a controller for monitoring the temperature and regulating the heater power, a control thyristor and a feedback unit; connected to the induction heater: an interface relay for monitoring the heater states "operation" or "malfunction", an interface relay for monitoring the heater states "operation" or "emergency", an interface relay for remotely turning on and off the heater in case of fire, an interface relay for remotely turning on and off the circulation pump and the heater, an automatic heater switch, an emergency switch of the heater; an automatic switch of the heater cooling fan and an intermediate relay for turning on and off the heater cooling fan, connected to the heater cooling fan; a system cooling fan with a system cooling thermostat connected to it with the ability to turn on the fan; Automatic circuit breaker of the circulation pump, connected through the contactor for switching the operation of the circulation pump to the pump, connected to the intermediate relay for switching on and off the contactor of the circulation pump; automatic circuit breaker of the control devices of the induction heater, automatic circuit breaker of the control circuits of the induction heater, switch for switching on the pump and heater, switch of local and remote control modes. The claimed invention is further explained with the help of Fig. 1, which schematically shows the control system of the induction heater from inside the housing, Fig. 2, which shows the front panel of the control system, Fig. 3, which shows a graph of the voltage increase during linear regulation, Fig. 4, which shows an electrical circuit for connecting the components of the system. The numbers on the figures indicate: - thyristor regulator (1) for operation of thyristor modules (30); - voltage filter (2); - block (3) of synchronization and calculation; - power setter (4); - controller (5) for monitoring temperature and adjusting the power of the induction heater (8); - control thyristor (6); - feedback block (7); - relay (9) interface for monitoring the states of the heater (8) “operation” or “malfunction”; - relay (10) interface for monitoring the states of the heater (8) “operation” or “emergency”; - relay (11) interface for remote switching on and off of the heater (8) in case of fire; - relay (12) interface for remote switching on and off of the circulation pump (37) and heater (8); - automatic switch (13) of the heater (8); - button (14) for emergency shutdown of the heater (8); - automatic switch (15) of the heater cooling fan (8); - intermediate relay (16) for switching on and off the heater cooling fan (8); - fan (17) for cooling the system; - thermostat (19) for cooling the system; - automatic switch (20) of the circulation pump (37); - contactor (21) for switching the operation of the circulation pump (37); - intermediate relay (22) for switching on and off the contactor (21) of the circulation pump (37); - automatic switch (23) of the induction heater control devices (8); - automatic switch (24) of the induction heater control circuits (8); - switch (25) for turning on the pump (37) and heater (8); - switch (26) for lo