JPH03500600A - Devices for controlling energy transfer in power supplies, especially devices for reducing switching transients - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Devices that control energy transfer in power supplies, especially reducing switching transients. device for reducing The invention relates to an arrangement for obtaining controlled energy transfer in a power supply. In particular, switching transient conditions (switching tra nsients).

One of the most important parts of the electrical components operated from the main body is the supply unit (supply unit). There is a ply unit).

The role of this unit is diverse and includes a shock-resistant structure (electrical isolation from the main body) vanic disconnection)), the different supplies required for each circuit. Generates supply voltage, balances and stabilizes changes in main unit voltage, protects circuits, etc. .

Achieve stabilization function even if the input power is from a device with 50 to 200W. If so, a big problem will arise.

Changes in mains voltage may exceed ±10%, or in special cases. Changes of -15% or even +10% may be required.

Conventional structures (e.g. body transformer-rectifier-filter condenser) er condensator) - stabilization circuit) power supply unit , even at the minimum value of the main body voltage, a voltage higher than the output voltage will be applied to the filtering computer. must be guaranteed on the computer.

This ensures stability with the normal mains voltage and especially with the maximum mains voltage. This causes a non-negligible loss on the bypass unit of the conversion circuit.

This condition means that power consumption is limited to low supply voltage circuits (5V digital circuits) in most of the equipment. This is further exacerbated by the fact that the

The main result is that the degree of efficiency of 30 to 40 percent achieved is It can be estimated that it is good.

When the device has large dimensions, it becomes heavy and very hot.

With the proliferation of computers, the issue of switching power supply units becomes a focus It is becoming. These units rectify the main voltage and then transfer the energy. and voltage conversion is performed by switching the main body voltage using an intermediate frequency. ing.

These power supply units have small dimensions and low weight. It has good efficiency.

However, the major problem with this unit is the The required radiating disturbance should be reduced. is difficult to implement, and the unit requires high-quality modern circuitry and is therefore more expensive. Moreover, the number of electrical elements used is very high, which reduces reliability. There is a point.

Analog power supply unit efficiency using precontrol Several attempts have been made to improve it.

Thyristors are used as switching elements due to their relatively high current strengths It can be done. These are, of course, only electrically switched on in the case of direct current. (switched in) but switched off (switched out) ).

Such control is only possible in the feedback interval of the main body voltage.

This means that the so-called preliminary control circuit (preregulation control circuit) circuit), which is complex and has unstable operation.

Another issue is the selection of filtering capacitors.

In the filter circuit to obtain good filter characteristics, , the required high-capacity computer can handle high current in an energy-free state. It generates a high current impulse that destroys the rectifier. This will result in loss or damage to the fuse. For filtering condenser However, the maximum voltage is very high.

A switch that completely prevents voltage changes from the main unit from being applied to downstream devices (consumers). Switches are also used and they are used as pre-stabilizing means. Key points of pre-stabilization is a controlled rectifier between the transformer and the input of the stabilizing circuit, which is connected to the charging voltage and mains. The voltage difference between the input and output of the stabilizing circuit during body voltage changes is required. It is used to limit the value to the minimum value.

This method can be limited to minimize loss of stabilization circuitry.

As a publicly known example, there is a special description regarding control on the primary side. , they do not have the advantages of the present invention.

U.S. Patent No. 4,524,413 uses a control switch that is simply a secondary side structure. have been shown to be useful, but do not have the advantages of the present invention.

The experimental results closest to the solution according to the invention show that such a connection This seems to be an obstacle to solving the problems caused by directly valving the terminals.

In this solution, experiments are carried out using known switching elements (thyristors, tri This was done using a control system (AC), which caused conventional control problems. This could not be realized due to the

It is therefore an object of the invention to provide controlled energy transfer for power supply. Arrangement for executing rgy transfer In particular, AC voltage power supply is a power consumption element (consumers). Switching transient phenomenon (switching tr This provides a means to reduce the number of chemicals.

According to the invention, the above object is achieved by a monitoring circuit between the alternating voltage current and the power consuming element. a first input of a switching circuit connected to a first output of the switching circuit; The other input of the switching circuit is connected to the other output of the monitoring circuit via the control circuit. This is achieved by configuring the

A preferred embodiment of the invention further includes a A transducer is placed therein.

In an embodiment of the above preferred arrangement of the invention, the voltage is applied to If the voltage supply source connected to the power consuming element rises above the value For this purpose, the control circuit has a separate input. and its input is further connected to a power consuming element via a control circuit.

Another preferred embodiment of the invention is that the transducer is a transformer; and the primary winding of that transformer is connected in series with the above switching circuit? Alternatively, the primary winding of the transformer is composed of two parts, and the two windings are A switching circuit is placed in series between the wire sections, or a switching circuit is placed between the wire sections. It is formed by a controlled semiconductor switch, whose gate is connected to the output of the above control circuit. It is something that is connected.

Secondary monitoring to ensure reliable measurement of energy supply at power consumption elements a circuit is arranged to measure one of the parameters in the power consuming element; is preferred. This monitoring circuit constitutes an error signal generator, and the coupling element is An optical coupler (opt.

coupler).

The output of this coupling element forms the output of the above-mentioned monitoring circuit and furthermore the transducer A rectifier is connected to the secondary winding of this transformer, and the output of the rectifier is A ballast is connected to the ballast and a monitoring circuit measures the voltage between the ballast input and output. It is set up for the purpose of

In the present invention, the power dissipation elements are controlled more than in a given circuit. If we can create a power consumption element with a distance, the energy flow will be within the given limit. It consumes high power, especially due to the dimensions of the main body. When considering the cross-sectional shape, cable overheating, etc., this is a great advantage. It is based on becoming.

The basic idea of the invention is that on the energy transfer line, e.g. monitor one of the parameters and if the parameter exceeds a predetermined value. For example, switching off a power consuming element. .

Of course, it is possible to monitor multiple parameters at the same time, and control them as well. It can also be done based on the parameters of

For example, in the case of a power supply unit, the energy flow on the output transistor or For example, it may be a voltage or an output short circuit.

Preferred embodiments of the present invention will be described with reference to the drawings.

1 to 4 are block diagrams showing preferred specific examples of the arrangement according to the present invention. It is Iadalam.

FIGS. 5 to 7 are diagrams showing specific examples of transducers.

FIG. 8 is a diagram showing another arrangement according to the present invention.

1 to 4 are block diagrams showing preferred specific examples of the arrangement according to the present invention. in which the voltage source U0 is an AC power supply connected to the power consumption element S. It is possible. - The power consumption element S is connected via the monitoring circuit F1 and the switching circuit ■6. is connected to the voltage power source Uo, thereby controlling the monitoring circuit F or the control circuit V. has another output connected to the other input of the switching circuit Vk via .

In the specific example of FIG. 2, between the switching circuit Vk and the power consumption element S, Transducer A is connected, while in the example of FIG. A visual circuit F2 is provided, the input of which is connected to the power consumption element Sa and its monitoring circuit F2. The output of the visual circuit F2 is connected to another input of the control circuit V.

The specific example in Figure 4 shows an example that includes all the aspects described above. , that is, two monitoring circuits F, , F2, transducer A, control circuit A and switch It has a switching circuit vk.

Figures 5 to 7 show specific examples of transducer A and switching circuit Vk. and the transducer is a transformer, and the transformer is For example, a controlled semiconductor switch The primary winding connected in series with the switch circuit vk such as 5w1tch) have.

In the specific example shown in Figure 5, the primary winding of the transformer TV is divided into two parts; A switch circuit Vk is provided between them.

FIG. 8 shows in more detail a specific example of the arrangement according to the present invention. U0 is an alternating current voltage generator, and its output has a voltage of 3. series circuit (D, .

D2; D3+D4; and Ds) are connected. voltage source Two resistors RA and R are connected in series to Uo.

Resistors RA and RB and diodes D In D 21 D s, D 4 and D s and D- form a monitoring circuit F1.

The control circuit V is connected on one side to the monitoring circuit F, and on the other side to the switching circuit Vk. It is connected to , and consists of two comparators, 1 and 2.

The output of 2 to the comparator is connected to the reference input of the comparator, while the other output of 1 to the same comparator is The measurement input is connected to the die through a voltage divider circuit formed by two resistors R1 and R2. A common connection between odes Ds and Ds is connected.

The reference input to the comparator also has some interference ) is connected to the output of a second monitoring circuit F2 that can correct the so the two signals are essentially superponed. . Also, the output of 1 to the comparator is the switching circuit Vk, for example, a transformer divided into two. T, at the control input of the control semiconductor switch inserted in series between the primary windings. It is connected.

According to the illustrated embodiment, transducer A also includes a rectifier G, and Specifically, the power consumption element S1 is supplied with direct current, and the rectifier G is supplied with a stabilizer S. and is connected to the power consumption element S.

Thus, in this case, the monitoring circuit F2 monitors the voltage of the stabilizer S. However, it is also possible to measure the temperature or current of the power transistor of the stabilizer St. It is possible.

In the example of the arrangement shown in the drawing, the comparator has a body corrected with an error signal. Compare the voltage value with the predetermined value given by resistors R1 and R2, and if recorded If the detected signal difference exceeds a predetermined limit value, the comparator Interrupt the series connection between the primary windings.

2 to the comparator predefined the energy flowing through the primary winding of transformer T1. If the measured value exceeds the predefined value, the switching cycle is The road Vk is cut off.

Energy monitoring is carried out by resistors RA and R, which determine the polarity of the voltage to be measured. is selected with the help of diodes Dr, D2.

Fig, 3 Fig, 4 international search report

Claims (8)

[Claims] 1. An alternating voltage power source (Uo) is connected to the power consuming element (S) (Sa) and An AC voltage power source (Uo) and a power consumption element (Sa) are provided, and the switch The switching circuit (Vk) is connected to the switching circuit (Vk) via the monitoring circuit (F1). The other input of is connected to the other output of the monitoring circuit (F1) via the control circuit. A device for controlling energy transfer for power supply, characterized in that: 2. A transformer is further provided between the switching circuit (Vk) and the power consumption element (Sa). 2. Device according to claim 1, characterized in that a deducer (A) is provided. 3. The control circuit (V) is provided with another input, which is connected to another monitoring circuit (F). 2) is connected to the power consumption element (Sa) via or the device described in 2. 4. The transducer (A) is a transformer (TR); The primary winding is connected in series to the switching circuit (Vk). 4. The apparatus according to claim 1, wherein the apparatus comprises: 5. The transducer is a transformer (TR) and the secondary winding of the transformer (TR) The wire consists of two parts and a switching circuit is arranged between the two winding parts. 4. Device according to claim 1, characterized in that the channels (Vk) are arranged in series. . 6. Is the switching circuit (Vk) formed by a controlled semiconductor switch? The control electrode of the switch is connected to the output of the control circuit (V). The apparatus according to claim 4 or 5. 7. The second monitoring circuit (F2) measures one of the parameters of the power consumption element (Sa) The monitoring circuit (F2) is connected to the error signal generator (Hk). For example, an optical connection is connected to the output of the error signal generator (Hk) without dynamic connection. It consists of a coupling element such as a combiner, and the output of the coupling element is sent to a monitoring circuit (F 7. Device according to claim 1, characterized in that it forms the output of 2). 8. The transducer (A) is a transformer, and the secondary winding of the transformer has a rectifier. A stabilizer (G) is connected to the output of the rectifier (G), and a stabilizer (St) is further connected to the output of the rectifier (G). A monitoring circuit for measuring the voltage is connected between the input and output of the stabilizer (St). 8. Device according to claim 1, characterized in that a channel (F2) is provided.