JPH05103423A - Unit power supply - Google Patents

Abstract

PURPOSE:To easily cope with the increase in power supply capacity without changing design. CONSTITUTION:A DC power supply is formed in unit form based on the reference rating. A power supply 1 in the form of unit electrically comprises ordinary electric supply circuit. The characteristics of all units are standardized, and have the rated voltage and rated current. In construction, they are placed in the same kinds of cases and unified. Various parts built-in the cases are also standardized, and all the power supply units 1 have the same configuration respectively. Number of parallel units of the power supply units 1 is changed depending on current capacity. By doing this, theoretically the power supply can respond to any capacity. For instance, if the capacity of 30V, 30A is requested to the power supply, one unit of the power supply unit will be sufficient. If 60A is requested with the same voltage, this can be realized by using two units 1 connected in parallel. By merely increasing the number of parallel units, increase in current capacity can be responded in a very wide range.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a unit power supply, and more particularly to a unit power supply capable of obtaining a large capacity power supply by combining standardized power supply units.

[0002]

2. Description of the Related Art The capacity of a system power supply, for example, a DC power supply such as a semiconductor tester (IC tester), tends to increase as the IC becomes highly integrated, has high functionality, and has high power consumption. . Conventionally, whenever a user requests such an increase in capacity, the design of the power supply is changed every time to meet the standard required by the user. The standard is different depending on the user, and the standard requirements for the same model may be different even for the same user, so that the efficiency was very poor.

Normally, the power source is a power transformer 41, a rectifier 42, a capacitor 43, a controller 44, as shown in FIG.
It is composed of components such as the detection unit 45. When the design is changed, it becomes necessary to replace all of these parts and start a new design. In addition, the power supply casing that stores this must be recreated by newly opening the mold. For this reason, a long design period was required, delivery was delayed, work was extremely complicated, and the cost was high.

In order to avoid this, it is not impossible to make a design assuming a large capacity in advance, but this does not allow effective use of resources, and the user is forced to make high shopping. .. It is also possible to increase the power of the output side of the power supply. For example, if the circuit of FIG. 4 is of a series control type, the output capacitance can be increased by connecting the series transistors 46 of the control unit 44 in parallel. However, even if only the output can cope with the increase in capacity, the power transformer 41 and the rectifier 4
Since 2 and the like are left with a small capacity as it is, it is not an essential solution.

[0005]

As described above, in the conventional power source, the design change is forced every time when the capacity is increased, so that the user's needs cannot be appropriately met in terms of time and price. .

It is an object of the present invention to provide a unit power supply which can eliminate the above-mentioned drawbacks of the prior art and easily cope with an increase in capacity by unitizing the power supply.

[0007]

As a unit power supply of the present invention, a power supply unit having a standardized rated capacity is prepared, and the rated current capacity is increased by connecting these power supply units in parallel. Is.

The unit power supply of the present invention is such that a power supply unit having a standardized rated capacity is prepared and the rated voltage capacity is increased by connecting these power supply units in series.

[0009]

The power supply units having standardized rated capacities can be connected in parallel because the output voltage is the same. If the power supply units are connected in parallel, the rated current capacity will increase by the number of connected units. Therefore, by connecting in parallel the units for the required rated current capacity, there is no design change,
We can meet the demand.

Further, the power supply units having standardized rated capacities can be connected in series because the output currents are the same. If the power supply units are connected in series, the rated voltage capacity will increase by the number of connected units. Therefore, if the units corresponding to the required rated voltage capacity are connected in series, the demand can be satisfied without any design change.

[0011]

Embodiments of the present invention will be described below with reference to FIGS.

The DC power supply is unitized by the standard rating. Unitized power supply is power supply unit 1
A power supply configured by combining the power supply units 1 is referred to as a unit power supply. The power supply unit 1 is electrically composed of the general power supply circuit shown in FIG. The control method of the power supply circuit does not matter, and therefore a series power supply or a switching power supply may be used. The power supply characteristics are standardized,
Has rated voltage and rated current. For example, rated voltage 30V,
The rated current is 30A as a reference. Structurally, it is desirable that they are housed in the same type of case and unified so that no unevenness occurs even if they are stacked or arranged side by side. Further, it is desirable that the various parts housed in the case are also standardized. In this way, all power supply units have the same configuration.

FIG. 1 shows a variation of a combination of unit power supplies. If the number of power supply units 1 connected in parallel is changed according to the current capacity, theoretically any capacity can be dealt with. For example, a power supply request within the capacity of 30V30A can be dealt with by preparing one power supply unit 1 (FIG. 1A). When the same voltage and a current capacity of 60 A or less are required, the power supply unit 1 is connected in parallel.
This can be dealt with by connecting the units (Fig. 1 (B)). Similarly, the number of parallel units (# 1 to # 4) is simply increased, such as 3 units for 90A (Fig. 1C) and 4 units for 120A (Fig. 1D). It is possible to deal with the increase in current capacity with just a few steps. In this case, since the capacity is increased step by step in units, it is not possible to meet the detailed requirements, but in reality, a stepwise increase is sufficient. If necessary, it is possible to meet some requirements by setting the rated capacity of the unit as small as possible.

In general, in a certain scale, for example, in an IC test system, an independent space for accommodating a power source is prepared in a housing housing the system. Therefore,
This space is modified so that several power supply units of this embodiment can be installed. Initially, in order to satisfy the capacity demanded by the user, the number of units corresponding to the capacity is provided as standard equipment, and if there is a need for capacity increase, additional capacity will be added as an option. In this case,
If casters are attached to the power supply unit, it will be easy to add more. As shown in FIG. 2, for example, the power supply unit 1
It is also possible to attach so as to stack (Fig. 2 (A)),
They can be mounted side by side (Fig. 2 (B)).

In the above embodiment, the case of increasing the current capacity has been described, but the present invention can be applied to the case of increasing the voltage capacity. FIG. 3 illustrates an embodiment in this case, in which the voltage capacity is increased by connecting the power supply units 1 in series. That is, the current capacity is constant at 30 A and the voltage is changed from 30 V (FIG. 3 (A)) to 60
V (Fig. 3 (B)), 90V (Fig. 3 (C)), 120V
(FIG. 3 (D)) ... and so on, depending on the number of connections.

As described above, according to the present embodiment, the power source is unitized and constituted by power source units having the same standard and the same capacity, and the need for increasing the capacity can be met only by combining the power source units. Therefore, it is no longer necessary to change the design of the power supply each time the capacity increases.
Further, since the structure is standardized, the connection work becomes easy. Therefore, it is possible to cope with the cost in a short time. Moreover, the power supply unit is connected so that it will be used within its rated capacity, and it will not be used in excess of the rated capacity of each unit.・ Performance can be maximized. Furthermore, because it is unitized, maintenance,
It is also advantageous for repairs.

The unit power supply of the present invention is not limited to a DC power supply such as an IC tester and can be applied to a general system power supply. Further, the present invention is not limited to the DC power supply, and can be applied to the AC power supply. In this case, it is necessary to control and synchronize the phase of each unit by, for example, firing the SCR at zero cross.

[0018]

According to the present invention, since the power source is unitized and the capacity can be changed by the combination thereof, it is possible to easily deal with the increase of the capacity.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a variation of current capacity increase of a unit power supply according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an example of stacking power supply units according to the present embodiment.

FIG. 3 is an explanatory diagram showing a variation of the voltage capacity increase of the unit power supply according to the present embodiment.

FIG. 4 is a configuration diagram of a general power supply circuit and a power supply circuit that constitutes the power supply unit of the present embodiment.

[Explanation of symbols]

 1 power supply unit

Claims (2)

[Claims] 1. A unit power supply characterized in that a power supply unit having a standardized rated capacity is prepared, and the rated current capacity is increased by connecting these power supply units in parallel. 2. A unit power supply, characterized in that a power supply unit having a standardized rated capacity is prepared, and the rated voltage capacity is increased by connecting these power supply units in series.