JPS59154517A - Multistage chopper control circuit for high-speed avr - Google Patents

Abstract

PURPOSE:To perform constant voltage control efficiently by using a high-speed multistage chopper control circuit for an acceleration power source circuit consisting of only semiconductor elements. CONSTITUTION:An error amplifier 20 consists of a measured voltage feeder 21 from a voltage divider, a feeder 22 for setting an output voltage, and an operational amplifier which peforms the impedance conversion of signals from both feeders, error amplification, etc. The output of the error amplification part is inputted to a clock circuit 31 which controls the on-off time of a switching element and the A/D conversion part 30 consisting of an A/D converter 32 to generate a digital signal corresponding to the difference between a set voltage and a measured voltage. This signal is sent to the gate circuit of the switching element through a latch circuit 40 and an amplifying circuit 41 in order to obtain proper waveform and timing as the gate circuit trigger circuit of the switching element. Consequently, voltage variation in a short time is controllable by supplying an on-off signal to the switching element 12.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an accelerated low source for a loaf made by particle injection, and sometimes to I) a small output DC generator for L pressure fluctuation compensation. on·
Off 1b1] VC control circuit, ≧, multi-stage transmission for AVR] control circuit.

[Prior art]

An example of an acceleration signal for a conventional neutral particle injection device:
Shown in Figure 1.

The thyristor switch 1 controls the alternating current (receives power from the source and controls fluctuations in iC pressure), and generates an i+55i DC turtle pressure including υ pulsating current from the DC generator Li:2.t1 load. For the ion 7, there is a series rectangle;
] Connect the DC generator 2 via the regulator 6. At both ends of the DC generated wave 2, the DC filter 3 and the series regulator 6 broke down. When connected, the crowbar switch 4 is connected to the ion source.

In this way, in the past, fixed bow pressure control and high-speed switching were performed using the parallel regulator RI-6, so the multi-stage chopper control circuit for high-speed A and VR was unstable.

However, in the acceleration device shown in Fig. 1, it is expected that the neutral particle injection device 7' will be at a higher pressure in the future. AL version 1
It is difficult to develop high-voltage, large-current clothing and air-conditioning ICs that can meet the demands of AIC.

In addition, it is expected that the temperature will be extremely high, and that such a vacuum tube will have a sheet resistance (more than 106 Ωcm) of Otani amount of pure water manufactured by 11f# and a core for cooling.
There is a lot of coarseness.

[Purpose of the invention]

An object of the present invention is to perform constant pressure control by using a circuit consisting only of semiconductor elements having only a switching function to perform the switching and constant pressure control functions of a vacuum tube.
There are 11 circuits of flj.

[Embodiments of the invention]

FIG. 2 shows an acceleration 'a source circuit composed only of semiconductor elements.

The thyristor switch 1 is supplied with power from an AC power source, and adjusts the voltage of a high-voltage DC voltage including pulsations generated by a DC generator 2 using a first voltage divider 8 and an automatic phase adjuster (A).
PPS) 9.

The ion source 7, which is a load, is connected to a DC generator 2 and a DC filter 3 to both ends of the DC generator 20 via a DC switch 10 composed of a semiconductor element with on/off (7) functions. Ru. In addition, in series with the output side of the DC generator 2, a unit in which a small output DC generator 11 is connected in series with a switching element 12 in order to compensate for voltage fluctuations that occur when the current rises rapidly, etc. Connecting.

A multi-stage chopper control circuit 14 for high-speed AYR is provided to provide all control signals to the switching element 12 based on the difference between the second voltage divider 1:3 and the set room pressure.

FIG. 3 shows a multi-stage chock 1 for high-speed AVR of the present invention.
jl) An example of the @circuit is shown.

The error amplification unit 20 includes a measurement voltage feeder 21 and an output % pressure setting feeder 22 from the second voltage divider 13, and a conversion shifter for performing impedance conversion, error amplification, gain adjustment, etc. of the signals from both feeders. Consists of an amplifier.

The output of the error amplification section is input to an A/D conversion section 30 consisting of a taroch circuit 31 for controlling the on/off time of the switching element 12 and an A/D converter 32, and is input to the A/D conversion section 30, which is configured to set the
1, the difference between the pressure and the measured voltage is converted into a digital signal. This digitized signal is waveform-shaped through a launch circuit 40 and an amplifier circuit 41 in order to obtain an appropriate waveform and timing as a gate circuit trigger signal of the switching element, and then sent to the gate circuit of the switching element 12. .

With the above configuration, long-term 'n BE' R8 (several ITIS or more) can be controlled by the thyristor switch, and short-term voltage fluctuations can be controlled by the small output from the multi-stage chopper ttilJ control circuit 14 for high-speed AVR of the present invention. DC generator 1
By applying an on/off signal to one switching element 12, each can be adjusted. -Not yet, A
By changing the frequency of the tarock circuit 31 of the /D converter 30, the response speed of automatic voltage control can be changed. Furthermore, in order to improve the accuracy of automatic IB pressure control, even if the number of small output DC generators 11 is increased, the A/D
This can be easily achieved by simply increasing the number of bits of the converter 30 and latch circuit 400.

〔Effect of the invention〕

By using the multi-stage chopper liJ@circuit for 1% speed AVR of the present invention, it becomes possible to control the fixed hair ball ft1lJ only with a semiconductor element that only has an on/off function.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of a conventional acceleration power supply using a series regulator using a vacuum tube, Fig. 2 is a circuit diagram of a semiconductor type acceleration power source, and Fig. 3 is a circuit diagram of a semiconductor type acceleration power supply for a high-speed AVR according to an embodiment of the present invention. It is a multi-stage Chotu'tViI control circuit diagram.

Claims (1)

[Claims] (3) In the device in which the DC generator is installed horizontally from the main DC generator and the DC generator for compensating eye pressure fluctuations, the surface of the DC generator for compensating for pill fluctuations is within the allowable range of pressure fluctuations. A high-speed AVR characterized by switching with a semiconductor device capable of controlling the output to the extent that the output can be set within (by connecting 1 α series of DC generators that subdivide the output hairball, and controlling the output).
Multi-stage chopper pricing episode 1? t.