CN2914485Y - Control signal transmitting device of high voltage soft start machine - Google Patents

Abstract

The utility model relates to power electronic technical field, more particularly a signal transmission device for transmitting signal between a low-voltage controller and a high-voltage power unit of soft starter of high-voltage motor. The utility model is characterized in that a controller (1) outputs, through an optical fiber (5), drive signals (DR1, DR2) and multiway control signals (CTL1, CTL2...CTLn) to a separation and modulation circuit (3), which inputs (+DR, -DR) to a demodulation circuit (4) and a decomposition circuit (6) through the optical fiber (5). The demodulation circuit (4) outputs two polar signals (+DR, -DR) to the decomposition circuit (6) through the optical fiber (5), and the polar signals (+DR, -DR) are reduced by the decomposition circuit (6) to drive signals (DR1, DR2). The utility model adopts the realtime and cost-effective control signal transmission device to transmit the above control signals to the gap of SCR phase-control drive signals, or transmit set and reset pulse signals to the gap of SCR phase-control drive signals to substitute for the transmission of original control commands, or adopt the SCR phase-control drive signals subjected to jump edge treatment to represent a control command. According to the configuration, the above signals are isolated from each other with time, and can be transmitted by the simple modulation/demodulation circuits through an optical fiber.

Description

Control signal conveyer in the high pressure soft starter

Technical field: the utility model relates to electric and electronic technical field, is applied to the transmission of signal between high pressure and low pressure especially.Specifically, be a kind of low pressure controller in the flexibly starting high voltage motor device and device for signalling between the high-voltage power unit of being applied to.

Background technology: numerous control signals are arranged in the high pressure soft start, must adopt optical fiber to transmit between the controller of low pressure and quantity is big, voltage is high power cell, its difficult point be and must transmitting some control command when transmitting the phased drive signal of controllable silicon in real time.In order to transmit these signals, existing soft starter adopts with lower device: a kind of is the configuration multiplexer channel, a part of signal is only transmitted on every road, as Fig. 2, two-way controllable silicon drive signal (DR1, DR2) that controller (1) sends and multi-way control signals (CTL1, CTL2......CTLn) send synthetic circuit (2) and controllable silicon series connection power cell (3) respectively to by optical fiber (arrow line), with the high real-time of retentive control signal, but its cost is higher, and reliability is low.Another kind of as Fig. 3, be to adopt data communication mode, all control signals are concentrated on transmission in the optical fiber (5), contain telecommunication circuit (3,4) respectively in controller (1) and the controllable silicon series connection power cell (2).Because some control signal real-time is had relatively high expectations, contain much information, in order to improve reliability of information transmission, measures such as necessary additional signal passback and verification calculating make the control response of whole system slower simultaneously, complexity increases, cost is also higher, and at present external like product is under the transmission speed of 10Mb it/s, and system reaches 10ms to the response time-delay of control, be difficult to adapt to the requirement of controlling high real-time, as the requirement of vector control.

Summary of the invention: the purpose of this utility model is to provide a kind of simple in structure, with low cost, easy for operation, real-time; Utilization requires far below this characteristic that requires to the phased drive signal of controllable silicon the real-time of control command, adopt a phased drive signal of controllable silicon and a various control command in the optical fiber high real-time ground transferring high voltage soft starter, the control letter conveyer in the high pressure soft starter that the satisfied high real-time that controllable silicon series connection power cell is controlled requires.The purpose of this utility model is achieved in that it comprises controller (1), controllable silicon series connection power cell (2), separation and modulation circuit (3), demodulator circuit (4), optical fiber (5), decomposition circuit (6).Controller (1) through optical fiber (5) output drive signal (DR1, DR2) and multi-way control signals (CTL1, CTL2......CTLn) to separating and modulation circuit (3), separate and modulation circuit (3) through optical fiber (5) will (+DR ,-DR) input to demodulator circuit (4, decomposition circuit (6), demodulator circuit (4) through two polar signals of optical fiber (5) output (+DR ,-DR) to decomposition circuit (6), be reduced to drive signal (DR1, DR2) through decomposition circuit (6).The drive signal that controller (1) goes out (DR1, DR2) is sent to through optical fiber (5) separates and modulation circuit (3), demodulator circuit (4), decomposition circuit (6), controllable silicon series connection power cell (2) are to be connected in series.The utility model has the advantages that: the high real-time that the utility model adopts, control signal conveyer cheaply, above-mentioned control signal is transmitted in the gap of the phased drive signal of controllable silicon, or transmit the transmission that set and reseting pulse signal replace former control command in the gap of the phased driving of controllable silicon, maybe can utilize the hopping edge of the phased drive signal of controllable silicon to handle the existence of a kind of control command of back representative.Make above-mentioned signal disconnected from each other in time by above-mentioned arrangement, can transmit with an optical fiber by simple modulation circuit.This control signal conveyer has reached very high real-time, the transmission delay of the phased drive signal of controllable silicon only is foreseeable fixing 5-10 μ S (only depending on used modulation parameter) when using the highest permission transmission frequency as the fiber transmission device of 5Mb it/s, the raising of several magnitude is arranged, can adapt to the requirement of various high real-times control, and simple, reliable, cost is low.

Description of drawings: Fig. 1 is the utility model circuit connection structure principle schematic; Fig. 2 is a prior art circuits syndeton principle schematic; Fig. 3 is a prior art circuits syndeton principle schematic.

Embodiment: controller (1) through optical fiber (5) output drive signal (DR1, DR2) and multi-way control signals (CTL1, CTL2......CTLn) to separating and modulation circuit (3), separate and modulation circuit (3) through optical fiber (5) will (+DR ,-DR) input to demodulator circuit (4, decomposition circuit (6), demodulator circuit (4) through two polar signals of optical fiber (5) output (+DR ,-DR) to decomposition circuit (6), be reduced to drive signal (DR1, DR2) through decomposition circuit (6).The drive signal that controller (1) goes out (DR1, DR2) is sent to through optical fiber (5) separates and modulation circuit (3), demodulator circuit (4), decomposition circuit (6), controllable silicon series connection power cell (2) are to be connected in series.The utility model operation principle: the utility model is to be connected in connect with controllable silicon signal transmitting apparatus between the power cell of controller, separate and a modulation circuit input phased drive signal of controllable silicon (DR1) and polar signal (PLT), replace two phased drive signals of controllable silicon.Before modulation, the phased drive signal of controlled silicon is divided into two signals disconnected from each other on the time with polar signal, transmit through being superimposed as a letter after the pulse modulation, be demodulated at power series unit place two polar signals (+DR ,-DR), resolve into two phased drive signals of controllable silicon (DR1, DR2) by decomposition circuit again; Separation and modulation circuit are also imported a plurality of control commands (CTL1, CTL2......CTLn), and the control command with the phased drive signal of controllable silicon transmits simultaneously adopts same Optical Fiber Transmission.Can replace the transmission of former control command in the transmission of the gap of the phased drive signal of controllable silicon or in transmission set of the gap of the phased driving of controllable silicon and reseting pulse signal according to the feature employing of control signal, or utilize the hopping edge of the phased drive signal of controllable silicon to handle the mode that a kind of existence of control command is represented in the back.Transmit with an optical fiber, by separating and modulation circuit, that above-mentioned signal is disconnected from each other in time.

Claims (2)

1, control signal conveyer in a kind of high pressure soft starter, it comprises controller (1), controllable silicon series connection power cell (2), separate and modulation circuit (3), demodulator circuit (4), optical fiber (5), decomposition circuit (6), it is characterized in that: controller (1) is through optical fiber (5) output drive signal (DR1, DR2) and multi-way control signals (CTL1, CTL2......CTLn) to separating and modulation circuit (3), separate and modulation circuit (3) through optical fiber (5) with (+DR,-DR) input to demodulator circuit (4), decomposition circuit (6), demodulator circuit (4) is through two polar signal (+DR of optical fiber (5) output,-DR) to decomposition circuit (6), be reduced to drive signal (DR1 through decomposition circuit (6), DR2).

2, the control signal conveyer in a kind of high pressure soft starter according to claim 1 is characterized in that: the drive signal that controller (1) goes out (DR1, DR2) is sent to through optical fiber (5) separates and modulation circuit (3), demodulator circuit (4), decomposition circuit (6), controllable silicon series connection power cell (2) are to be connected in series.

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