JPH10289799A - Power supply device and accelerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate external adjustments for a power application start signal, a current-setting value or the like by forming a power supply for operation, in matching with a current setting value via a timing setting unit installed within the power supply itself. SOLUTION: A current-setting value Ir is preliminarily sent from a setting device 7 to a current instruction unit 2. When a power supply start signal (s) is sent from a timing generation device 8, a power supply start signal Sn for a power supply is outputted, and a current-setting value Ir is outputted from the current instruction unit 2 to a power supply control part 4. In addition, the power supply control part 4 sends output current Id to a load 9, according to the current-setting value Ir. An output current Id is detected with a current detector 5, and compared with the current setting value Ir in a deviation detector 6 for the calculation of a deviation ε. The deviation ε is fed back to the power supply control part 4, and control is made so that the output current Id approaches close to the current setting value Ir. Also, a deviation εcorresponding to a delay in the load 9 and the power supply control part 4, relative to the current-setting value Ir, is connected to the timing setting unit 3, thereby converting the deviation ε with time for quickly outputting the power supply start signal Sn for the power supply.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a power supply device.

[0002]

2. Description of the Related Art In an elementary particle accelerator, an electromagnet is used to control the orbit of elementary particles. A power supply device for exciting such an electromagnet is characterized in that the output current is rapidly changed in a fixed pattern and the operation is repeated,
In order to obtain stable acceleration of the elementary particles during operation, it is required that the tracking deviation generated in the output between the power sources is small.

As a power supply for exciting such an electromagnet, there is a power supply as described in "Development of a high-speed and high-precision power supply control method" reported in the 1991 National Conference of the Industrial Application Division of the Institute of Electrical Engineers of Japan.

In the prior art, high-speed and high-precision control of the output current is possible. However, in order to further improve the tracking of the output current caused by the difference in the control characteristics between the power supplies, an energization start signal and a current setting signal are set. External adjustment of values and the like was necessary.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a power supply device for exciting an electromagnet used to control the orbit of elementary particles, which eliminates the need for output current tracking adjustment. is there.

It is another object of the present invention to provide a system in which when a plurality of power supply devices are connected, a tracking deviation of an output current generated between the power supplies is small.

[0007]

According to the present invention, in order to solve the above-mentioned problems, the power supply is provided with a function of correcting a delay in the power supply including a load. Adjustment is possible, and this function makes it possible to realize a power supply device that does not require external timing adjustment.

Further, by using a plurality of power supplies having the adjusting function, an accelerator system having a small tracking deviation between the power supplies can be realized.

The present invention has a function of correcting a delay in a power supply including a load in the power supply, and eliminates the need for external adjustment.

Further, by connecting a plurality of power supplies, it is possible to configure an accelerator system having a small tracking deviation occurring in an output current between the power supplies.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the power supply device of the present invention. In FIG. 1, a power supply device 1 includes a current command device 2 (output command device) for commanding an output current value, and a timing set device 3 (time setting device) for providing a current output time at a predetermined timing.
Setter 3 according to the current set value of current commander 2
Power supply control unit 4 that supplies current to load 9 from the output time of
(Power control means), a current detector 5 (detection means) for detecting the current of the load 9, and a deviation detector 6 (deviation detection means) for comparing the deviation between the current detector 5 and the current command device 2. Have been.

The setting device 7 is an external device that gives desired current information to the current commander 2 in advance, and the timing generating device 8 is an external device that gives the energization start time.

In this configuration, the setting device 7 sets the current set value I
r is given to the current command device 2 in advance.

In order to obtain an expected output current Ie (a target waveform of an output current flowing through the load 9), when an energization start signal s is given from the timing generator 8, a power energization start signal sn (here, In the case where there is no function of correcting the delay in the power supply including the load, the timing becomes s = sn), and the current command unit 2 outputs the current set value Ir to the power supply control unit 4 to control the power supply. The part 4 has a current setting value Ir
, The output current Id is output to the load 9.

The output current Id is detected by a current detector 5, compared with a current set value Ir by a deviation detector 6,
Is calculated.

The deviation ε is fed back to the power supply control unit 4 and is controlled so that the output current Id approaches the current set value Ir.

At this time, the power control unit 4 sets the current set value Ir
, A delay in the load 9 and the power supply control unit 4 occurs, and this delay is equivalent to the deviation ε.

This deviation ε is fed back to the power supply control unit 4,
The power supply controller 4 controls the output current Id to approach the current setting value Ir.

Here, the deviation ε is connected to the timing setting device 3, and the time conversion of ε is performed in the timing setting device 3.

In the loop of the current controller 4, the load 9, the current detector 5, and the deviation detector 6, the transfer function G (s) of the output current Id with respect to the current set value Ir generally has a first-order lag,
It is shown by the following equation.

[0021]

(Equation 1)

In the equation (1), τ is the power supply control unit 4 including the load 9.
Indicates a time delay.

As shown in FIG. 2, the current set value Ir has a slope A
From the equation (1), the output current Id with respect to the current set value Ir is delayed by τ, and the time delay τ is

[0024]

Τ = ε / A (Expression 2) Therefore, by specifying A in advance, it is possible to perform time conversion from the deviation ε.

The time delay τ is converted by sampling the deviation ε several times, and after the sampling, the current setting unit 3 corrects the energization start signal s to the current command unit 2 at a timing earlier by the time delay τ. Power supply start signal s
It is possible to provide n.

The function of compensating the delay in the load 9 and the power supply controller 4 in the power supply makes it possible to configure a power supply that does not require external timing adjustment.

When the power supply of the present invention is applied to the excitation power supply of the main electromagnet of the particle accelerator, the current setting value Ir given by the setting device 7, the energization start signal s given by the timing generator 8, The expected output current Ie and the output current Id of the power supply are as shown in FIG.

In FIG. 3, a period Ta is an incident period for causing elementary particles to enter the accelerator, a period Tb is an acceleration period for accelerating the elementary particles in the accelerator, a period Tc is a period for taking out elementary particles, and a period Td is a current. Is a reset period for returning to the value at the time of incidence.

The application of the present invention to such a current set value Ir will be described below.

FIG. 7A shows the energization start signal s, and FIG. 7B shows the waveform before the time delay correction for the deviation ε is performed.

In this case, the current set value Ir is supplied to the power supply in accordance with the energization start signal s. However, as described above, due to the delay in the load 9 and the power supply control unit 4, the output current Id with respect to the current set value Ir is The current flows through the load 9 with a delay of time τ.

Since the expected output current Ie is at the position of the current set value Ir, if the correction is not performed, the output current Ie is shifted from the required position by a time delay τ.

Next, the case where the time delay is corrected for the deviation ε will be described with reference to FIG.

When the correction is performed, before the power supply start signal s is received by the power supply at the same timing as before the correction, the power supply power supply start signal sn is output from the load 9 and the power supply controller 4 by the power supply correction function. The current set value Ir is given to the power supply earlier by τ minutes,
The output current Id is output in accordance with the position of the desired output current Ie, and as a result, the desired output current Ie and the desired output current Id match.

As a correction means, a method of correcting a time delay τ by using a clock signal can be considered.
FIG. 4 illustrates a case where a clock signal is prepared on the power supply side and a method of clocking the energization start signal s itself as an example of correction.
This will be described with reference to FIG.

First, when a clock signal is prepared on the power supply side, the energization start signal s has a constant cycle T as shown in FIG. , (B), the clock scn is multiplied by n times, and the clock position corresponding to the time delay τ is (n−
n _τ ), the power supply start signal sn as shown in FIG.
Can be considered.

According to this method, the power supply start signal sn in which the time delay τ is corrected is provided, and the desired output current Ie
Can be output.

Next, when the energization start signal s itself is clocked, the energization start signal s as shown in FIG.
Is supplied from an external timing generator 8 from the beginning with a clock scx multiplied by n as shown in (1), and the timing setter 3 in the power supply 1 is a clock position corresponding to the time delay τ (n from -n _tau), a method of providing power energization start signal sn as shown in (d). As in the case of (b), the power supply start signal sn in which the time delay τ is corrected is given, and the desired output current ie can be output.

With either method, there is no need to externally adjust the tracking of the output current, and the delay is corrected in the power supply, so that external adjustment is not required. (B) and (c) are combinations of logic circuits or
This can be realized by using software processing via an arithmetic processing unit.

FIG. 5 shows a case where the power supply of the present invention is combined.

The description of the same signals as those in FIG. 1 will be omitted.

In this figure, the power supplies 1-1, 1-2... 1-n have a function of correcting the deviation ε described in FIG. Here, the current setting values Ir1, Ir2,.
rn to each power supply, and load 9-1, 9 according to the current set value.
It is assumed that the output current is output to −2,.

When energization is started at the same time by the energization start signal s, the delay of each power supply becomes difficult due to the load connected to each power supply and the delay in each power supply. .

Here, when each power supply has a correction function as shown in FIG. 3, each power supply responds to an energization start signal s.
Since the correction is automatically performed, it is possible to perform a tracking operation between the power supplies, and it is easy to configure a system that minimizes the tracking deviation occurring in the output current between the power supplies.

[0045]

According to the present invention, the power supply is configured to operate in accordance with the current set value by the timing setter provided therein, so that the power supply start signal and the current set value and the like are externally controlled. No need to adjust.

When a plurality of power supplies according to the present invention are operated in combination, the power supply can automatically perform tracking operation. The configuration becomes simple.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a power supply device of the present invention.

FIG. 2 is an explanatory diagram of a time delay with respect to a ramp pattern input of the power supply device.

FIG. 3 is a waveform chart showing timing of the power supply device of the present invention.

FIG. 4 is a waveform chart showing the timing of the correction means of the power supply device of the present invention.

FIG. 5 is a block diagram showing one embodiment when a plurality of power supply devices of the present invention are operated.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Power supply device, 2 ... Current commander, 3 ... Timing setting device, 4 ... Power supply control unit, 5 ... Current detector, 6 ... Deviation detector, 7 ... Setting device, 8 ... Timing generation device, 9 ... Load.

Claims (2)

[Claims] An output command means for receiving a set value of an output and outputting an output command in accordance with the set value, a time setting means for receiving an output start time of the set value and giving a start time to the output command means. Power supply control means for outputting an output according to the set value from a start time, a detection means for detecting an output of the power supply control means, and a deviation between the output and the set value using the detection means. By the deviation detecting means to detect,
In a power supply device that supplies an output according to a set value to a load, the power supply device has a function of obtaining a desired output by converting a deviation generated in the deviation detection unit into time and giving a correction to the time setting unit. Power supply device characterized. 2. An accelerator for minimizing a tracking deviation occurring in an output between power supplies by combining a plurality of the power supplies according to claim 1.