Patent RU-2659806-C1 (RU)
Inventor: KLADIEV SERGEJ NIKOLAEVICH
IPC: F16K31/04
Filed: 2017-03-20
Granted: 2018-07-04
Abstract: FIELD: electrical engineering. 
     SUBSTANCE: invention relates to the field of electrical engineering and can be used in electric drives for shut-off, control valves, pipelines for the transportation of oil, oil products in chemical and petrochemical industries. Device comprises position sensor (7) of the output link of electric drive (1), first microprocessor-based unit (8) connected by an input to position sensor (7) and designed to process the data received from it. Device includes first power supply unit (9) connected to first microprocessor-based unit (8) and configured to connect to an electrical power source, first network interface unit (10) connected to said first microprocessor-based unit (8). Device comprises an intelligent control module including housing (11), second microprocessor-based unit (12) for data processing and diagnostics. Second power supply unit (13), second network interface unit (14), third network interface unit (15), analog output unit (17), digital input unit (18), digital output unit (19) are connected to second microprocessor-based unit (12). Second microprocessor-based unit (12) is configured to be connected to interface module (4) of switch (3). Second power unit (13) is configured to be connected to the electrical power source. Second network interface unit (14) is configured to be connected to first network interface unit (10). Third network interface unit (15), analog output unit (17), digital input unit (18) and digital output unit (19) are configured to be connected to automated process control system (16). In this device, it is possible to remove intelligent control module (11) from electric drive (1) for a considerable distance (up to 1,200 m), which excludes the effect on the intelligent vibration module from the side of electric drive (1), temperature changes and other extreme environmental conditions in the pipeline area. In order that the control unit, even if the connection between units (10) and (14) is broken, can determine the current torque, second microprocessor-based unit (12) is adapted to receive a current stator current signal of said motor (2) and a signal about the current voltage in each phase of the electric circuit feeding said motor (2), and with the possibility of calculating the torque of electric drive (1) taking into account the said signals. In a specific embodiment, intelligent control module comprises a portion of electrical circuit (20), terminals (21), (22) of which are configured to be sequentially connected to the electric circuit feeding motor (2). In each phase of said electrical circuit portion (20), current sensor (23) and voltage sensor (24) connected to transmit said signals respectively about the current current and the current voltage to said second microprocessor-based unit (12) are installed. Second power unit (13) is connected to said electrical circuit portion (20). Probability of failure-free operation and speed of the claimed device in case of excess of the specified torque increases. Device is easy to maintain, as it does not require manual calibration of the sensors. 
     EFFECT: technical result is to increase the speed of response of the microprocessor-based unit to exceed the specified torque limit, at which motor (2) shall be disconnected from power supply source. 
     3 cl, 1 dwg