JP2001015300A - Resonance power supply for rapid cycle synchrotron - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resonance power supply for rapid cycle synchrotron capable of assuring a requisite voltage accuracy even if the load mesh number has increased. SOLUTION: A resonance power supply for a rapid cycle synchrotron is composed of a rectifier circuit 4 to rectify the AC voltage, a high-frequency inverter 5 connected with the rectifier circuit 4, a high-frequency transformer 6 connected with the inverter 5, a rectifier circuit 7 to rectify the output of the high-frequency transformer, and a smoother circuit 8 to smoothen the output of the rectifier circuit 7, wherein the output of the smoother circuit is supplied to a resonance capacitor through a choke transformer. The high-frequency inverter uses a voltage-driven switching element of self-arc extinction type.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rapid cycle
The present invention relates to a resonance power supply for a synchrotron, and more particularly to a resonance power supply for a rapid cycle synchrotron, which is reduced in size and improved in output accuracy.

[0002]

2. Description of the Related Art A rapid cycle synchrotron is considered as a booster ring for injecting electrons or positrons into all bunches of a main ring in a short time. When a rapid cycle synchrotron is used for the booster ring, an electromagnet is arranged on the circumference of the booster ring, and a capacitor is arranged in series with the electromagnet. The circuit is configured so that the resonance circuit including the electromagnet and the capacitor resonates at a required frequency, for example, 50 Hz.

FIG. 2 is a diagram showing a conventional resonance power supply for a rapid cycle synchrotron. In the figure, reference numeral 7 denotes a rectifier for rectifying an AC power supply voltage. The rectifier 7 forms a rectifier circuit with a control rectifier such as a thyristor to control a DC output voltage. 8 is a smoothing circuit for smoothing the output of the rectifier 7, 9 is a semiconductor switch for supplying an exciting current to the electromagnet 13, 10 is a charging reactor, 11 is a choke transformer, 12 is a resonance capacitor, and 13 is a rapid cycle circuit.
An electromagnet arranged on the circumference of the synchrotron.

The resonance capacitor 12 and the electromagnet 13
Is divided into a plurality of groups (mesh) having a symmetric configuration to form a distributed resonance network. By configuring this distributed resonance network, the circuit voltage can be reduced to a manageable level.

Further, a secondary circuit of a choke transformer is connected in parallel with a capacitor to supply a DC bias current to the electromagnet. The rectifier 7, the smoothing filter 8,
A power supply circuit including the semiconductor switch 9 and the charging reactor 10 supplies power consumed by the electromagnet 13, the choke transformer 11 and the capacitor 12 as a pulse current via the primary winding of the choke transformer.

When the supplied power and the AC power loss are balanced, the amplitude of the AC current flowing through the electromagnet 13 is determined. The resonance frequency is determined from the combined inductance and capacitance of the electromagnet and the choke transformer secondary winding per mesh. Adjustment of the frequency can be performed in combination with a minute capacitor.

[0007]

The conventional resonance power supply for rapid cycle synchrotron has a small power supply capacity and the output voltage is not sufficiently stable. However, when the number of load meshes composed of the electromagnet and the capacitor is small, no particular problem occurs. However, the large-sized rapid cycle synchrotron, which is being considered as the next system, has a large number of load meshes. Therefore, a power supply with high voltage accuracy for a large rapid cycle synchrotron is desired. However, if the required capacity and voltage accuracy are to be obtained with the conventional configuration, the power supply device must be enlarged.

The present invention has been made in view of the above problems, and provides a resonance power source for a rapid cycle synchrotron capable of obtaining necessary capacity and voltage accuracy even when the number of load meshes increases.

[0009]

The present invention employs the following means in order to solve the above-mentioned problems.

[0010] A rectifier circuit for rectifying an AC voltage, a high-frequency inverter connected to the rectifier circuit, a high-frequency transformer connected to the high-frequency inverter, a rectifier circuit for rectifying the output of the high-frequency transformer, and smoothing the output of the rectifier circuit. A resonant circuit for a rapid cycle synchrotron that supplies a smoothing circuit output to a resonant capacitor via a choke transformer, wherein the high-frequency inverter uses a voltage-driven self-extinguishing type switching element. I do.

A rectifier circuit for rectifying an AC voltage, a high-frequency inverter connected to the rectifier circuit, a high-frequency transformer connected to the high-frequency inverter, a rectifier circuit for rectifying the output of the high-frequency transformer, and In a resonance power supply for a rapid cycle synchrotron, which comprises a smoothing circuit for smoothing and supplies a resonance power through a choke transformer to a plurality of resonance circuits including a plurality of electromagnets and a resonance capacitor arranged on the circumference of the synchrotron,
The high-frequency inverter uses a voltage-driven self-extinguishing type switching element.

Further, in the rapid cycle synchrotron resonance power supply, the high frequency transformer comprises an iron-based amorphous magnetic alloy core, an iron-based ultra-microcrystalline magnetic core, an ultra-thin silicon copper iron plate core, and a ferrite core. The chosen one
Characterized by a core of

In the rapid cycle synchrotron resonance power supply, the high frequency inverter is a multi-phase inverter whose output phases are mutually shifted.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a diagram showing a resonance power supply for a rapid cycle synchrotron according to an embodiment of the present invention. In the figure, 1 is a disconnector for turning on and off the power, 2 is a circuit breaker for turning on and off the power, 3 is a step-down transformer for transforming the received voltage to a voltage suitable for the rectifier 4, and 4 is received power. A rectifier that rectifies an AC voltage to obtain a DC voltage. The rectifier 4 can stabilize the final DC output voltage by forming a rectifier circuit with a control rectifier such as a thyristor and controlling the DC output voltage. 5
Is an inverter for converting the DC output voltage of the rectifier 4 into a high-frequency AC. Inverter 4 is IGBT, power MO
It can be composed of a voltage-driven self-extinguishing element such as an SFET. The inverter is constituted by a plurality of single-phase inverters having mutually shifted phases, a three-phase inverter, or a multi-phase inverter such as a three-phase inverter having mutually shifted phases. Reference numeral 6 denotes a high-frequency transformer, wherein the core of the high-frequency transformer is one core selected from an iron-based amorphous magnetic alloy core, an iron-based ultra-microcrystalline magnetic core, an ultra-thin silicon copper iron plate core, and a ferrite core. Is used. In the figure, the same portions as those shown in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.

The power received from the AC power supply through the disconnector 1, the circuit breaker 2, and the step-down transformer 3 is rectified by the rectifier 4, and the rectified DC voltage is converted into a high-frequency AC by a high-frequency inverter. Is transformed by the high frequency transformer 6. The high-frequency alternating current transformed by the high-frequency transformer 6 is rectified by the rectifier 7. The rectifier 7 can form a rectifier circuit with, for example, a control rectifier to control the DC output voltage at high speed and with high accuracy. After the output of the rectifier 7 is smoothed by the smoothing circuit 8, the output is supplied to the electromagnet 13 via the thyristor switch 9, the charging reactor 10, and the choke transformer 11, which are driven at a cycle that resonates with the load mesh.

The resonant power supply for the rapid cycle synchrotron according to the present embodiment is constituted by a high-frequency multiphase inverter 4 using a voltage-driven self-extinguishing element such as an IGBT or a power MOSFET. Since the capacity of the smoothing circuit decreases in proportion to the product of the frequency and the number of phases, the resonance power supply according to the present embodiment can reduce the capacity of the smoothing circuit. In addition, since the core of the transformer uses an iron-based amorphous magnetic alloy core, an iron-based ultra-microcrystalline magnetic core, an ultra-thin silicon copper iron plate core, or a ferrite core, high-frequency operation becomes possible, and Loss such as eddy current loss can be reduced. As a result, the core size can be significantly reduced, and the high-frequency transformer itself can be reduced in size. Therefore, it is possible to reduce the size of the building in which the apparatus is installed, to reduce the wiring length, and to reduce the cost.

Further, since the DC power supply is constituted by using a rectifier circuit using a high-frequency inverter and a control rectifier, the output voltage can be stabilized at high speed and with high accuracy. , The required voltage accuracy can be obtained.

[0018]

As described above, according to the present invention, the entire apparatus can be significantly reduced in size. Further, even if the number of load meshes increases, required voltage accuracy can be obtained at high speed.

[Brief description of the drawings]

FIG. 1 shows a rapid cycle according to an embodiment of the present invention.
It is a figure which shows the resonance power supply for synchrotrons.

FIG. 2 is a diagram showing a conventional resonance power supply for a rapid cycle synchrotron.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disconnector 2 Circuit breaker 3 Step-down transformer 4 Rectifier 5 Inverter 6 High-frequency transformer 7 Rectifier 8 Smoothing circuit 9 Semiconductor switch 10 Charging reactor 11 Choke transformer 12 Resonant capacitor 13 Electromagnet

Claims (4)

[Claims] A rectifier circuit for rectifying an AC voltage; a high-frequency inverter connected to the rectifier circuit; a high-frequency transformer connected to the high-frequency inverter; a rectifier circuit for rectifying an output of the high-frequency transformer; A rapid cycle / synchrotron resonance power supply comprising a smoothing circuit for smoothing and supplying the smoothing circuit output to a resonance capacitor via a choke transformer, wherein the high frequency inverter uses a voltage-driven self-extinguishing type switching element. Characteristic resonance power supply for rapid cycle synchrotron. 2. A rectifier circuit for rectifying an AC voltage, a high-frequency inverter connected to the rectifier circuit, a high-frequency transformer connected to the high-frequency inverter, a rectifier circuit for rectifying the output of the high-frequency transformer, and an output of the rectifier circuit. A rapid cycle synchrotron resonance power supply comprising a smoothing circuit for smoothing, and supplying a resonance power through a choke transformer to a plurality of resonance circuits including a plurality of electromagnets and a resonance capacitor arranged on the circumference of the synchrotron; The high-frequency inverter uses a voltage-driven self-extinguishing type switching element, and is a resonance power supply for rapid cycle synchrotrons. 3. The high-frequency transformer according to claim 1, wherein the high-frequency transformer is an iron-based amorphous magnetic alloy core, an iron-based ultra-microcrystalline magnetic core, an ultra-thin silicon copper iron plate core, And a ferrite core for a rapid cycle synchrotron. 4. The resonant power supply for a rapid cycle synchrotron according to claim 1, wherein the high-frequency inverters are multi-phase inverters whose output phases are shifted from each other. .