SU1059651A1 - Inverter with control unit - Google Patents

Abstract

1. INVERTER WITH A CONTROL UNIT, containing a series-connected master oscillator, and a pulse suppressor, two suction elements, a bridge voltage inverter with control of eight keys in each rack and a DC source with an average output, and in each rack Two controllable switches are connected in series between the poles of the DC source, which are shunted by the first return diode, and a third control key is installed between the middle output of the DC source and the common connection point. The first two keys, the output of the inverter, to which the second return diode is connected by one of the electrodes, control input of the second switch are connected through G to the corresponding element of the corresponding pulse distributor output, that is, with a circuit for improving the overall weight indicators, improving reliability and manufacturability, another sensor of registration of a reactive sensor is connected to another electrical module of the second returnable diode, which is an additional IAC of each rack of the bridge inverter load current connected to the poles of the DC source, the control input of the third, controllable key is connected to the output of the dividing element through the matching element, the first input of which is connected to the corresponding output of the pulse distributor, and the second input to the output of the 1 registration sensor the reactive load current of the subsequent stand of the bridge voltage inverter, the corresponding outputs of these elements are connected to the corresponding singing inputs of the coincidence elements, the first with the output, the second and t rety - with installed at the input of the second and third controlled keys of the subsequent stand of the bridge voltage inverter, respectively, the third input of the coincidence element installed at the input | the third controllable keys, is connected (L with the previous output of the distribution of individual pulses connected to the input of the division element installed at its input. 2. The inverter according to claim 1, in which the sensor registers - the radioactive load current radios contain: an input current sensor connected to the corresponding pole of the direct current source, a key transducer whose input is connected to the output of the current sensor and through a resistor - O5 to the other pole of the direct current source, and also a voltage level converter, the output of which 3. An inverter according to claim 1, characterized in that the division element of the control pulses contains two R-S triggers, two ZI-dE elements, three 2I-NOT elements, two 2IL elements -NOT three inverters NOT and a reset element, the pier the first input of the control pulse division element is directly connected to the inputs of the first two ZI-NE elements and R is the input of the second trigger

Description

pa, a through the first inverter - with the first input of the first element 2IL — NOT, the output of which is connected to the R-input of the first trigger; The second input of the division element is directly connected to the second input of the second element 2ILI — NOT, the output of which is connected to the second input of the first element 2 OR — and through the second inverter to the first inputs of the first two Elements and the second input of the first element 2I — NO, whose first input connected to the output of the first element, and the output to the first input of the second element 2I-NOT, the second inlet of which is connected to the direct output of the first trigger, and the output to the c5 input of the second trigger, the inverse output of which is connected to the right input of the second element 2ILE-NOT and the third input to them of the EiToporo element ZI-NOT, the output of which is connected to the S input of the first trigger, the inverse output of the first trigger being the first output of the division element and connected to the first input of the third element 2I-NO, the second input of which is connected to direct output of the second trigger, and the output is directly connected to the third input via the third inverter with the second output of this division element, the third input of the first ZI-NE element is connected to the output of the reset element.

one

The invention relates to electrical engineering and can be used in secondary power supply sources of alternating current for loads with an inductively active nature, with virtually any power factor.

Devices are known in which a stepwise voltage output converter method is used to increase the utilization rate of switching transistors.

In this case, in one case, a series of output transformers is used, the output windings of which switch the load through a controlled key according to a given algorithm, go one transformer with an intermediate output} on its primary winding, which is controlled by means of controlled keys on the DC source iJHpJ ;.

The disadvantage of such converters is low overall weight and technological parameters.

Closest to the offer, the 4u is a device that uses a single DC power source with an intermediate pin and a bridge inverter with three controllers with keys in each rack. Moreover, two keys are connected in series between the poles of the DC source, and the third between the middle pin; the house of this source and the common point of the first two keys are made on two counter-connected transistors, with diodes connected in series with them.

The disadvantage of the device is its limited capacity for loads with low values.

The purpose of the invention is to increase reliability, improve overall weight indicators and the manufacturability of the device.

The goal is achieved by the fact that in an inverter with a control unit containing a series-connected master oscillator and pulse distributor, two coincidence elements, a bridge voltage inverter with three control keys in each of its racks and a DC source with an average output, in each rack, two controllable keys are connected in series between the poles of the DC source, one of which is shunted by the first return plate / and the third control key is installed between the middle pin DC source and common connection point of the first two keys, which is the output of the inverter to which one second return electrode is connected, abrasively the second key input is connected through a corresponding element of the match with the corresponding output of the pulse distributor, to the other electrode of the second return diode, It will complement (with the horizontal output of each rack of the bridge inverter, the sensor of registration of the reactive load current connected to the poles of the DC source, controlling the The third controllable key is connected via the coincidence element to the output of the division element, the first input of which is connected to the corresponding output of the pulse distributor, and the second input to the output of the reactive current sensor to load the next stand of the bridge voltage inverter, the corresponding outputs of these elements to the corresponding inputs elements of the match, the first one — with the output installed at its output, the second and the third — with the second and third installed at the input: the controlled keys follow bridge inverter and voltage, respectively, be the third input of the coincidence element mounted on the third inlet actuated keys, is coupled to predBschuschim output pulse distributor connected to the inlet,

set at its input division element.

The sensor for detecting reactive current contains an input current sensor, associated with the corresponding pole of a DC source, a key transistor whose input is connected to the input of a current sensor and through a resistor to another pole of a DC source, as well as a voltage level converter, the output of which is connected to a common pole using. DC point.

The control pulse division element contains two RPZ-triggers, two ZI-NOT elements, three 2I-NOT elements, two 2IL-NOT elements, three NOT inverters, and a reset element, the first of which the control pulse dividing element is directly connected to the second inputs of the first two elements ZI-NOT and the R-input of the second trigger, and through the first inverter with the first input of the first element 2ILYE, the output of which is connected to the R-input of the first trigger, the second input of the division element is directly connected to the second of the second element 2IL-NOT the output of which is connected to the second input of the first element 2ILI-NOT and through the second inverter with the first inputs of the first two elements ZI-NOT and the second input of the first element 2I-NOT, the first input of which is connected to the output of the first element ZI-NOT, and the output from the first the input of the second element 2I-NOT, the second input of which is connected to the direct output of the first trigger, and the output with the 3rd input of the second trigger, the inverse output of which is connected to the first input of the second element 2IL-NOT and the third input of the second element ZI-NOT, the output of which is connected with s steam inlet the trigger, the inverse output of the first trigger is the first output of the division element and is connected to the first input of the third element 2INE, whose second input is connected to the forward output of the second trigger, and the output is directly connected to the third output and through the third inverter to the second output of this the dividing element, the third input of the first eloiente ZI-NO is connected to the output of the reset element.

The master oscillator is made with a frequency divider.

FIG. 1 shows an inverter circuit with a control unit; in fig. 2 - version of the bridge rack with a sensor for registering reactive load current; in fig. 3 is a variant of the elemental division according to the duration of the control pulse with an element coincidence; in fig. 4 and 5 are output voltages.

The device contains master inverter 1, frequency divider 2, intermediate output 3 frequency divider, pulse distributor 4, first, second and third controlled keys 57, respectively, racks 8.1-8.2 bridge Inverters, elements 9.1-9.2, 10.1-10.2, inputs 11 -12 elements 10.1 coincidence, elements 13.1-13.2 division by control pulse duration, inputs and outputs 14-17 elements 13.1 division, outputs 18.1-18.2 racks of a bridge inverter, switching transistor 19, diode 20, return diodes 21 and 22, sensors 23.1,23.2 registration of reactive load current, key transistor 24, resistor 25, voltage level converter 26, gok sensor 27, RS-flip-flop 28 and 29 elements ZI-NE 30-31, inverters 32-35, elements 2ILINE 36 and 37, 2H-riE 38-40, element 41 reset,

The master oscillator 1 consists of the oscillator and frequency divider 2 installed at its output and having a higher-frequency intermediate output, and 3. The main output of frequency divider 2 is connected to the input of the distributor 4 pulses, which is made according to the ring counter circuit. Moreover, the number of discharges of the ring counter depends on the ratio of the duration of the output voltage steps and the number of phases of the converter. FIG. Figure 1 shows a six-output pulse distributor for a two-phase converter. In this case, each first (and fourth) output of the distributor 4 is simultaneously connected to the control input of the first switch 5 corresponding to the first 8.1 (and subsequent 8.2) stand of the bridge inverter and the first input of the coincidence element 9.2 (9.1) installed at the input of the second controlled switch 6 subsequent rack 8.2 (8.1) bridge inverter. Every second (and fifth) output of the distributor 4 is connected simultaneously with input 11 of element 10.1 (10.2), coincidence, the output is connected to the control switch 7, respectively, of the first and subsequent rack 8.1 (8.2) of the bridge inverter and the second input of the element

9.2G9.1) coincidence, the third (sixth) output of the distributor 4 is connected to the input 14 of the corresponding division element 13.1 (13.2) installed at the input of the element 10.1 (10.2) coincidence) the output 15 of the division element 13.1 (13.2) is connected to the input 12 the element 10.1 (10.2) coincidence, the output 16 with the third input of the element 9.1 (9.2) coincidence, the STSLKA 8,1 (8.2) bridge inverter contains x controlled by the key 5 7, the outputs of which are combined and connected to the output 18.1 (18.2) of the bridge inverter, the second switching electrode of controlled keys, respectively, is connected in 5 - to one pole of the source chnika DC, used in the other, in 7 - with a mean terminal,

The control key 6 is shunted by a return diode 22, another return key, and a 21 is connected between the common point of the keys 5 and b and the additional output of the bridge inverter rack, connected to the sensor input 23 .. 1 (23.2 registering the reactive current of the load). A diode 20 is installed in series with a switching transistor 19 as the L / R keys of the transistors.

A serial diode 21 is fitted with a 27current sensor, which is included in the registration sensor 23.1 (23.2), and is installed at the input of the key transistor 24, the emitter of which, together with the second electrode of the sensor 27, is connected to the pole of the DC source, and the base is an additional output, stand of the bridge inverter and through a resistor 25 to the common pole of the t-eye source, the input of the transistor 24 is connected to the input of a voltage level converter 26, the output of which is the output of the element 23.1 (23.2) c. the input 17 of the element 13.2 (13.1) dividing the control pulse installed in the control circuit of the control switch 7 of the previous rack of the bridge inverter.

The control pulse dividing element 13.1 consists of two-CZ-triggers 28 and 29.

The first input 14 of the element 13, the division is connected to the second inputs of the ZI-xCHE 30 and 31 elements and the input of the trigger 29 and through the inverter 32 to the first input of the element 2IL-riE 36, the output of which is connected to c, R-input 1 of the trigger 28.

The second input 17 of element 13.1 is connected to the second input of element 2ILILEE 37, the output of which is connected to the second input of element 36, and through the 33% inverter to the first inputs of elements 30 and 31, as well as the second input

This 2I-YE 38, the output of which is connected to the first input of element 2I-NOT 39. The second input of element 39 is connected to the forward output of trigger 28, and the output eio is connected to the S input of trigger 29. The inverse output of trigger 28 is connected to the first input of element 10.1 match and second input element 2I-YaE 40, the first input of which is connected to the direct output of the trigger 29, and the output - to the output 15 of the element 13.1 and through an inverter. 34 with the release of 16 of the same element 13.1. The inverse output of the trigger 29 is connected to the third input of the element 31 and the first input.c and element 34. The output of the element 30 is connected to the first input of the element 38, and the third - to the output of the return element 41, which is designed as a delay element, which serves as an additional output 3 divider 2 frequency set at the output of the generator 1 frequency.

The inverter works as follows.

The master oscillator 1 through a frequency divider 2 controls the operation of the distributor 4 pulses, the output signals from each bit of which in accordance with the diagram (figure 4) establish the state of the controlled keys in the racks of the bridge inverter. the presence of a control pulse in the first discharge of the distributor 4p, then at the beginning the key 5 will be opened in one and 6 in the other rack of the bridge inverter. Thanks to the load, a current will flow through the entire DC source feeding the bridge inverter.

By an impulse in the second discharge of distributor 4, key 5 is locked and key 7 is opened in the same rack 8.1 of the bridge inverter. At the same time, the current in the load continues to flow, but from half of the source of direct current. If there is a pulse in the third order of the distributor 4, flip-flop 28 is moved, as a result of which the key 7 remains in the on position and the key b of the other rack 8.2 of the inverter bridge is turned off. If there is a reactive current in the load, in this case it flows through the open key 7 and the return diode 21 of the second pillar 8.2 of the bridge inverter to the second half of the direct current created by the bias on the current sensor 27 blocks the key transistor 24 which in turn causes the transistor to close in the converter 26 of the sensor 23.2 level of detection of reactive load current.

The received state at the input 17 of the division element 13.1 through elements 38 and 40 cocks the trigger 29, the signals from which turn off the element 13 and solve the switching on of elements 37 and 40. In the absence of reactive current in the load, the trigger 29 is activated by the signal of the delay element 41, or intermediate output 3 of the frequency divider (2. At the end of the reactive load current, the transistor 24 is opened by the gift of the biasing in its base through the resistor 25. This leads to the unlocking of the transistor by the element 23.1 level converter 26. Due to the presence of zero The potential at input 17 of element 13.1 trigger 2.8 returns from the initial position through elements 37. As a result, the element 10.1 matches and the control key 6 is turned off. At the same time, the signal from trigger 28 through element 40 and the inerter 34 unlocks the key 7 in the second 8.2 and 6 in the 8.1 racks of the bridge inverter, due to which the reverse polarity of the first half of the dc source will flow in the load, until the third discharge of the distributor 4 is assigned to the output of the third bit. .ovat control pulse. The transition of the controller to the fourth bit of the distributor 4 will turn off the key 7 and turn on the key 5 of the same rack of the AUGUTERN of the inverter, which will lead to the repetition of the described process for the inverse polarity of the output current. In the event that the reactive current of the load did not cease by the moment the control pulse entered the fourth discharge of the distributor 4, then regardless of this, the trigger 29 returns to the initial state, which leads to unlocking of the same keys 5 and 6 and the reactive current will continue flow through the return diodes 21 and 22 to the entire DC source.

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Claims (3)

1. INVERTER WITH A CONTROL UNIT, containing a serially connected master oscillator, and a pulse distributor, two coincidence elements, a bridge voltage inverter with three controlled keys in each of its racks, and a DC source with an average output, two in each rack. controlled keys are connected in series between the poles of the DC source, one of which is shunted by the first return diode, and the third controlled key is installed between the middle terminal of the DC source and the common connection point of the first two keys, which is the output of the inverter, to which one of the electrodes is connected the second return the diode, the control input of the second key is connected through I the corresponding element of coincidence with the corresponding output of the pulse distributor, characterized in that, in order to improve measuring the overall weight and weight, improving reliability and manufacturability, a load reactive registration sensor is connected to another electrode of the second return diode, which is an additional output of each rack of the bridge inverter, connected to the poles of a direct current source, the control input of a third, controlled key through a matching element connection is connected to the output of the division element, the first input of which is connected to the corresponding output of the pulse distributor, and the second input is connected to the output! ” a sensor for detecting reactive load current of a subsequent rack of a bridge voltage inverter, the corresponding outputs of these elements are connected to the corresponding inputs of the matching elements, the first with installed on its output, the second and third with installed at the input of the second and third controlled keys of the subsequent rack of the bridge voltage inverter, respectively , the third input of the coincidence element installed at the input <of the third managed keys is connected to the previous output of the distributor. pulses connected to the input of the division element installed at its input. 2. Inverter by π. 1, with the fact that the sensor for detecting the reactive current of the load contains a current sensor at the input connected to the corresponding pole of the DC source, a key transistor whose input is connected to the output of the current sensor and through the resistor - 7 to another pole of a direct current source, as well as a voltage level converter, the output of which is connected to a large pole of a direct current source. · 3. Inverter pop. 1, characterized in that the element of division. control pulses contains two R-S-flip-flops, two elements ZI-NOT, three elements 2I — YA, two elements 2IL-YA.E three inverters YE and a reset element, and the first • input of the control pulse division element is directly connected to the second inputs of the first two elements ЗИ — ЯЕ and the R input of the second trigger pa, and through the first inverter, with the feather input of the first element 2 OR — NOT, the output of which is connected to the R input of the first trigger; the second input the element of division is directly connected to the second input of the second element 2 OR — NOT, the output of which is connected to the second input of the first element 2 OR —. NOT and through the second inverter - with the first inputs of the first two ZI-NOT Elements and the second input of the first 2I-NOT element, the first input of which is connected to the output of the first ZI-NOT element, and the output - with the first input of the second 2I-NOT element, the second input which is connected to a direct exit! ” the first trigger, and the output is the c5 input of the second trigger, the inverse output of which is connected to the first input of the second element 2OR — NOT and the third input of the second element 3— NOT, the output of which is connected to the S-input of the first trigger, the inverse output of the first trigger being the first the output of the division element and is connected to the first input of the third element 2I-NOT, the second input of which is connected to the direct output of the second trigger, and the output is directly connected to the third input through the third inverter with the second output of this division element, the third the input of the first ZI element is NOT connected to the output of the reset element.