SU1598117A1 - Device for transmitting voltage with galvanic decoupling - Google Patents

Abstract

The invention relates to automation and impulse technology and can be used in automatic control devices with galvanic isolation. The aim of the invention is to simplify the device. The goal is achieved by introducing the shift register 10 and connecting the setup input R of the shift register to the output winding of the pulse transformer 9, the first terminals of the windings of the pulse transformers 9 and 2 are connected via key element 3 containing transistor 4, diode 5 and resistor 6, the second terminals of the pulse windings transformers are combined and connected to the common wire of the key element and the common input bus 8. In this case, the input bus 7 is connected to the control input of the key element, and the generator 1 is connected to the input winding pulse th transformer 2 and the counting input C of the shift register, and the data input D is connected to the power bus. 1 il.

Description

The invention relates to automation and pulse technology and can be used in automatic control devices with galvanic isolation.

The purpose of the invention is the simplification of devices

The drawing shows a functional diagram of the device.

Device for transmission _; voltage ς galvanically isolated contains a pulse generator 1 connected to the primary winding of the pulse transformer 2, between the windings of the pulse transformers 2 and 9, a key 3 is turned on, consisting of a transistor 4, a diode 5 and a resistor 6, and input buses 7 and 8. To the output winding of the pulse the transformer 9 is connected to the zero setting of the shift register 10, the second output of the shift register is the output 11 of the device, the synchronization input of the shift register 10 is connected to the output of the pulse generator 1, and the information input p Register a bus power supply. Input buses 7 and 8, respectively, are connected to the control and general drives of key 3.

The device operates as follows.

If there is a zero or negative potential on the input bus 7 relative to the bus 8, the transistor 4 of the key 3 is open. zero state. Upon receipt of a positive potential on the input bus 7, the key 3 is closed, stopping the passage of voltage pulses from the generator ΐ to the input of the installation in the zero state of the shift register 10. Under the influence of the pulses of the generator 1 arriving at the synchronization input of the shift register 10, a unit begins to be written to the 1.0 register. When a short interference pulse appears on the I input bus 7 in the intervals between synchronization pulses, the shift register 10 does not respond to this interference, since at this moment there is no synchronization pulse at the synchronization input of the shift register 10, which increases the noise immunity of the device.

The use of the proposed potential transfer device with galvanic isolation provides an increase in the number of channels without increasing the number of additional galvanically isolated power sources, pump generators and control circuits from the control equipment, '' increased noise immunity, high input impedance, and also simplified control circuits.

Simplification of the control circuit is achieved by the fact that the four-phase generator is replaced by a single-phase one, four And circuits are excluded, three keys are eliminated, and the design of pulse transformers is simplified.

The presence of a high input resistance of the device allows you to consume low power from the control object along the potential transfer circuits (information signals).

Claims (1)

Claim A device for voltage transmission with galvanic isolation, containing a pulse generator, first and second pulse transformers, a key, a two-wire input bus, an output bus and a power source, characterized in that, in order to simplify the device, a shift register connected to the installation input is entered into it zero state to the first output of the secondary winding of the second pulse transformer, the synchronization input to the first output of the pulse generator, and the information input to the bus of the power source, the output bus connected to the output of the second discharge of the register, the shift, the key is connected between the first terminal of the secondary winding of the first pulse transformer and the first terminal of the primary winding of the second pulse transformer, the second conclusions of which are interconnected and with the common connection point of the first input bus wire and the common key output the control input of which is connected to the second wire of the input bus, the first ⁵ 1598117 ⁶ output of the pulse generator of the co-adapter, the second output of which is connected to the first output of the primary volume with a common bus and the second output of the coil of the first pulse transformer pulse generator.