JPS5953085A - Condenser input type rectifier circuit - Google Patents

Abstract

PURPOSE:To reduce the heat loss of a rectifier, to facilitate the heat dissipation and to reduce the cost of the rectifier by combining a rush current preventing circuit and a rectifier. CONSTITUTION:Thyristors T1, T2 are respectively provided at the adjacent sides which form a bridge in a bridge type rectifier, and diodes D3, D4 are respectively provided at the other sides. Series circuits of rush current limiting resistors R1, R2 and diodes D1, D2 are respectively connected in parallel with the thyristors T1, T2. The thyristors T1, T2 are OFF at the power source energizing time, and an input current is flowed through three elements of the resistor R1 and the diodes D2, D4, or three elements of the resistor R2 and the diodes D2, D3, thereby limiting the excess rush current. Thereafter, the thyristors T1, T2 are turned ON, and the input current is flowed mainly through two elements of the thyristor T1 and the diode D4 or two elements of the thyristor T2 and the diode D3.

Description

[Detailed Description of the Invention] Regarding rectifier circuits that cause inrush prevention (which irritates the function), in detail, the inrush prevention part and the rectification part are skillfully combined to achieve low heat loss. This article relates to an input circuit suitable for high-power power supplies that can achieve low power consumption.

When the power switch is turned on for the first time in a condenser type rectifier circuit, the terminal voltage at the 21st and 1st terminals is '-!
G, power supply☆1. HH Ryo is 21 N) J to Enri.

Since both C and C are short-circuited, an excessive inrush current (→ no-ge current) (Ai, re, diode 1'JF, il'
i There is a possibility that I will be killed. Mokog conventional technology C, for example,
The figure shows j, uni, and four-tree diodes I) 1, +>
2゜C3,l:l/l/+mouth growling 71-1-A small resistance is established between the solid and the smooth = Indenri O. In particular, the lifting platform of the Karasu 7h power 1Ii11 device ~ is affected by the inrush current rAE limiting resistor R1, and the power 1 loss (
Heat generation) becomes very small. C1 This resistor [K1 is parallel to R1, Iristor zlR continuation (), Power shin 1 thread is cut ° Iristor 11 is set to A and rushes in with resistor R1 7Iλ
The current is limited to 1 and then 1 to 1, and then 1 to 1 to A to reduce power loss as much as possible.

colls1. '? 'lRi/7. c, tl)1, I
N, r,)3 q) ternary r, or C2, TI
, C4. 11 (When it becomes a switching power supply for W culm tσ, 100V is input) Jj and 20Δ
If this happens, the heat generated by the C die A-to and relay register will become very noticeable.

Normally, the die A-de, which carries beam current, etc., has a capacity of 1 mm and 5 Δ culm; 1,! The 4th Noirista needs something around 30A. Therefore, the shape is 6
Not only does it become more expensive, but the price rises rapidly as the capacity increases, making it expensive. Also, since the light and heat parts are concentrated, heat dissipation measures are quite necessary. There are drawbacks such as yelling at people who are troublesome.

The purpose of the present invention is to solve the above-mentioned problems of the prior art, to skillfully combine an inrush prevention circuit and a rectifier, to reduce heat loss, and to achieve easy processing. ka°
Our objective is to provide a low-cost rectifier circuit.

The present invention will now be explained in more detail.

FIG. 2 is a circuit diagram showing an embodiment of the present invention.

This implementation 191 is a bridge type rectifier circuit, and the adjacent two 72 which form the bridge 114 are connected to
, 12 is set up and tied to the other two B27 [)
3. C4 is installed. The orientation of the relay resistor 1-1゜"1-2 is the same as 1 and 11, and the direction of the diode that goes into the normal rectifier bridge is the same. (L/ (, each relay resistor Ic
: tlD, inrush current to +l+, current limiting resistor and diode in which series 'i( is 1 & connected. 1'<>wa 0
, ゛-r to lister 11]-1 or in parallel to resistor 1 < 1 to dia 1'-1'' −[Reni−
) Resistor 1 < 2 and diode 1] 2 Which n column circuits are connected to each of the 6 columns. Nasu-i 1/Star IN
, l-2 each have a diode [)5. f
) G are connected and their anode sides are commonly tied i! ;
) and a signal from an l-rigger circuit (not shown) is input.

This circuit next creates J: sea urchin ribs. When the power is turned on, the Zyristors TI and II are in the off state. Therefore, the input terminal has three elements: resistor 1<1, gooey A-do DI, C4, or resistor [<2, diode l)2. Passes through the three elements of C3 (flows).

One 31, the resistor R1, r<2 immediately turns on the power.
After a certain period of time has elapsed, a charging current of 1 Jt is supplied to the smooth T1 and the terminal voltage of -C rises, causing an inrush of 7 U.
When the current becomes sufficiently small, the 1-trigger pulse is supplied from the trigger circuit to each iris register rl and T2, and each resetter'I-1, T2 becomes A and 4r.From this point on, the input The terminal mainly flows through the two elements of Iristor 11 and diode I) 4, or through the two elements of Iristor T2 and diode [] 3, and the resistor R2 has almost no current. Not flowing.

Therefore, the diode with a low current capacity, which was required in the conventional circuit, is not needed in the C1 input card A-do Di,l)2. What 21 (now, as mentioned above, when 1 is 1. Dl (or 11, I) 2), current flows through C and jl1, there is a risk of 11. The period until 'I'2 passes through! ,
There is a gap between the number 1 and m5.

Therefore, if you use a sufficiently convex diode with a diode resistance of 11-1, the rated forward current will be small (
As long as you can smell the lassico current)
I don't mind. J, it has less heat loss (゛Special 4j/
There is no need to take measures against fever.

As mentioned above, > f = 'jl'; Once in operation, the input current is 2 element f of Iristor '1 and diode 1]4,
Alternatively, since the flow passes through the 2 element Y of Iristor 12 and diode 1 and 3, the loss is equivalent to one dymate at a steep cycle compared to the conventional circuit (with a switching power supply of 1 kW and 1σ, the loss of more than 10 W or more is lost). 1.) Prevention? 1", the efficiency can be improved accordingly.

The following table shows a comparison of the ratings of each element in a 1 kW SWITZBUNK power supply between the conventional circuit and the circuit of the present invention. .

! 1 Although the present invention increases the number of parts 1j+j, there is a shortage of parts 1ia.
It more than compensates for [3 ■ Dorigure! , there are two editions.

The number of resistors and resistors can be reduced by half, the size can be reduced, the number can be doubled (4l-)-ζ, and the price can be obtained at a rather low price. (This is because noise risks etc. are easy to become intrusive, but 1111 + 18 is steep. The capacity is J-sized, and no heat dissipation measures are required.The rating of the diode D1゜102 is 5A in the present invention λ"8, but these diodes I) 1,
t) 2 only needs to withstand the rash of power immediately after the power is turned on, and in reality, a smaller capacitance will suffice. In the example (
, 1 heat generating parts are gui x-do l) 3.1) 4, relay resistor I'l, '+2, resistor R1, R2, but in the conventional circuit's 1 J, °) No heat is generated, and the heat generated in the DI and D2 parts of the conventional circuit is eliminated.
! ! Since the heating part is reduced by +1, the amount of heat generated decreases by 1 minute, and therefore, the heat dissipation is easily reduced by 14, and the efficiency also decreases by -1.

4, the wooden example is Daiyid D5. I) G has a difference in the Andt pressure of each relay lister 1'1.1-27:
bIi' + 1 question (, 4' 1. /,: It is inserted so that two questions can be turned on, and it is extremely small.

When the present invention 4 is installed in a bridge rectifier circuit, the insertion positions of the Zyristors are adjacent to each other. :stomach.

In the example of the large door above, there are positions C for Dl and D2, but 1) 3
tr,) 40) 4;I i+! '(,I) 1
D41/) position fl, &5 Ir' is also valid at D2 and 1]3 position.

The present invention can also be applied to rectifier circuits other than the L ridge.For example, in the case of a single-phase half-wave rectifier circuit, the third
X tr small+l, J, 3 i, 'l i A-do v7
What adult? Fj flow restriction I11. II's: Relay resistor 1-7 is connected in parallel to the series circuit of R7 at 11°; privately made 11'1
Ba J, Ishi, and 2 wood quiodes 1+1 L! In the case of a Q lj-phase full-wave rectifier circuit, an inrush current limiting resistor is installed in the inner row of each die A-F, and an iris resistor is installed in each of the parallel lJJ. Good.Furthermore,
The present invention can be applied to a double voltage rectifier circuit as shown in FIG. 4. Even in the case of
10 resistor 1゛((, J2 plus the above resistance 1<11
(parallel strain r risk 11 for the series connection of A-do[]9) should be inserted respectively. Since there is a rectifier circuit C with j・1 structure, the inrush prevention function is good and the heat loss is small.
Efficiency C1 However, since the heat generating part is iB', L/, and there is no locally large heat generating part, heat dissipation treatment is easy and small ≧1'? There are many excellent effects that can be achieved, such as ``Q'' and ``1!'' of a low-cost 4T circuit.

[Brief explanation of the drawing]

Figure 1 is a 1J circuit diagram showing +JY, 'Next technology Todo , FIG. 1 shows further 52 (1) of the present invention.
FIG. 1 is a circuit diagram of the 14th embodiment. IJI, l)2, D3, l)4... diode, 11゜12... reister, R1, In...
・Inrush current limiting single generation resistor. Figure 2 Figure 3 418-

Claims (1)

[Scope of Claims] 1. Combination of rectifier die A-de and smooth J'den die etc.
In a rectifier circuit of input type, Thai A is
- Connect an inrush current limiting resistor in series with the ? “4 Noiristas are in A mode only immediately after the i source is turned on.”
, Inrush prevention +l: t; M l+P, is a human-powered rectifier circuit. 2. Is the rectifier circuit a bridge system 1? Rectifier circuit Ca-)'C,
The inrush current limiting resistor is connected in series with the diodes 211 and 1 adjacent to the bridge.
A rectifier circuit according to claim 1.