SU792231A2 - A.c. voltage regulator - Google Patents

Description

(54) VOLTAGE STRESS STABILIZER

I

The invention relates to the field of electrical engineering, in particular, to systems for controlling electrical quantities using semiconductor devices. It can be used primarily to stabilize the anode current of high-power microwave generators in pulsed transmitting devices and devices for accelerating charged particles.

ten

Known stabilizer AC

voltage, according to the main author. St. No. 546863, for example, for powering a generator lamp, containing a regulating element, the control circuit of which j is connected to a phase matrix unit connected to an amplifier / converter connected to the output of a stabilizer, a transformer, a constant voltage source, an aransistor and a time parallel parallel RC-ueno4Ky, moreover, the transistor is connected between the output of the source and the input of the amplifier-converter, its base is shunted by the R C-chain

which is connected via a diode and a transformer to the stabilizer input.

However, in the known stabilizer, protection is not ensured in the event of an arising. effect of multiple overloads caused by tfobo (short circuits by locking) in the load, for example, by its short-term disconnection from the power source.

The purpose of the invention is to provide protection during repeated overloads of the nyrsvi of the stabilizer with automatic restarting.

The goal is achieved by the fact that a current sensor, an integrating circuit, a threshold unit and a BAN logic element, the output of which is connected to the control input of the regulating element, and the current sensor input are connected to the load, are introduced into the AC voltage regulator. The drawing shows an electrical circuit diagram of a variable voltage stabilizer. The stabilizer contains a T1-fistor regulating element t with a pulse-phase control, a load 2, a phase control block, a converter 4i connected to the output of the stabilizer, a transformer 5, a constant voltage source 6, a transistor 7 with resistor 8 in the emitter circuit and the time setting is parallel 1. A C-chain from a resistor 9 and a capacitor 10 in the base circuit, and this chain through diode II and transformer 5 is connected through the contacts of the switching device 12 (such as a relay or a contactor) to an AC power supply network. Transistor 7 with a resistor 8 is connected between the output of the source b and the input of the amplifier-converter 4. The load 2 may, in particular, be a pulse module 13, to which the magnetron 1.4 and the resistive sensor 15 of the average anode current of the magnetron are connected, with the input of the amplifier a-converter 4. The stabilizer also contains an overload current sensor 1, an integrating circuit 17 with accumulation, a threshold node 18, and a BANE logic element 19. The overload current date4iiKa 16 can be connected, for example, with the output of the power supply mode torus 13. The output of the sensor is connected in series with the intrinsic cutting circuit 17 with accumulation and the threshold node 18 is connected to the input (for example, to an inverting) of the logical element BANE 19. The other command is given the enable command, for example, rep, in the form of a +273 voltage On The output of element 19 is connected to element 1 via a switching device 12. Device 12 is essentially a control circuit of regulating element I. Therefore, the connection of the output of element 19 to the input of element 12 can be considered a connection with the control input of the regulating element enta. The stabilizer works as follows. In the initial state, when the BAN 19 logical element has not been given the command to turn on the + 27V Cch. he locks up; control element I and load 2 are de-energized. When a short-term overload occurs (for example, a single breakdown in the modulator 13 or magnetron 14, a short-term pulse appears at the output of the sensor 16, which is fed to the integrating circuit 17 with accumulation. A voltage is generated at its output, which is insufficient to unlock the threshold node 18 and therefore locking the element 19. The device 12 remains in the on state. The accumulation integrating circuit 17 can be implemented on the basis of known circuit solutions, for example, based on a peak detector. For example, a Schmidt trigger can be used as a threshold node. In the event of multiple or prolonged overloads (for example, caused by repeated breakdowns in the modulator 13 or magnetron 14) multiple impulses appear at the output of sensor 16. After integrating them and accumulating at the output circuit 17, a voltage appears that exceeds the trigger threshold of node 18. The latter unlocks and causes the voltage of the logical unit to the inverting input of element 19, which consequently goes into a locked state s I element and obestochivayuts load 2, the voltage at the output 16 accesses the sensor is zero, so the device 12 vozvraschae1h: in initial state: the contact pair -zamykaets left and right is opened. The capacitor 10 is quickly charged through the transformer 5 and the diode 11, the transistor 7 is opened. The voltage at the output of the circuit 17 after some time decreases to a value less than the threshold-response of the node 18, and it returns to its original state. A logical input zero is applied to the wiring input of the element 19 and the element goes into the open state, the device 12 is activated, the regulating element I and the load 2 automatically turn on the mains voltage, and the primary winding of the transformer 5 is opened. Condenser Yu begins to gradually discharge and the load current begins to gradually increase. (A second and other implementation of the connection of the output of the element 19 with the control input of the element 1: for example, the output voltage of the element 19 can be powered by the phase control unit 3, as shown by a bold dashed line. Then when the element 19 is locked to the control electrodes of the thyristors element

Claims (1)

Claim AC voltage stabilizer St. No. 546863, characterized in that, in order to provide protection during repeated overloads by turning off the stabilizer and then automatically reconnecting, a current sensor connected in series, an integrating circuit, a threshold node and a logic element is PROHIBITED, the output of which is connected to the control input of the control element , and the input of the current sensor is connected to the load. ВНИИПИ Order 9432/47 Circulation 9 56 Subscribed Branch of PPP 'Patent', Uzhhorod, st. Project, 4