SU1543513A1 - Device for pulse-phase control of converter - Google Patents

Abstract

The invention relates to electrical engineering and is intended for use as a phase-impulse control system for thyristor frequency converters for a high-power synchronous electric drive. The purpose of the invention is to increase the stability of the converter operation during load accidents. The device contains a series 1 multiphase voltage sensor 1, three multiphase blocks 2–4 of key elements, three potentiometers 5–7, four channels 8–11 for shaping the control angles of the converter valves, a processing unit for outputting the control channels, a driver 15, and a pulse distributor 16 control, transducer fault condition sensor 17, and element I. 1 Il.

Description

Compiled by S.Luzanov L.Vselovska Editor. Tehred M.Hodanich Proofreader S.Vykmar

Zack

h 406

Circulation 495

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

Production and publishing plant Patent, Uzhgorod, st. Gagarin, 101

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Claims (1)

Formula of the invention _{) z} A device for pulse-phase control of a converter containing a multiphase voltage sensor, the output of which is connected to the inputs of three multiphase key blocks, the outputs of the first and second multiphase key blocks are connected to the fixed contacts of the first potentiometer, and the outputs of the second and third to fixed the contacts of the second potentiometer, the movable contacts of which are connected respectively to the inputs of the channel-formation of the minimum and maximum control angles, the output of the second multi the key block is connected to the synchronizing input of the channel for forming an adjustable control angle, the task input of which is connected to the output of the task source, and the output with the first input of the And element, the second input of which is connected to the output of the channel for forming the maximum control angle, and the output to the first input of the And element , the second input connected to the output of the channel forming the minimum control angle, and the output through the pulse shaper - with the input of the pulse distributor, the output of which is connected to the control input MI, multi-phase blocks of keys and is designed to connect to the control inputs of the converter, a load accident sensor, characterized in that, in order to increase the stability of the converter during load accidents, it is equipped with an additional potentiometer, fixed contacts included between the outputs of the second and third multiphase blocks of key elements , an additional channel for forming the angle of controls in emergency. mode with a response time shorter than that of the channel for forming an adjustable control angle, the AND element, the OR element is equipped with a third input, the movable contact of the additional potentiometer through the channel for forming the control angle in emergency mode is connected to the first input of the And element, the second input of which is connected to the output of the accident sensor load, and the output with the third input of the OR element. Editor L. Veselovskaya Compiled by S. Luzanov Tehred M. Khodanich Corrector S. Shekmar Zak ^ s 406 Circulation 495 Subscription VNIIIPI of the State Committee for Inventions and Discoveries at the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Plant Patent, Uzhgorod, st. Gagarina, 101.