JPS5992362A - Power source simulator - Google Patents

Abstract

PURPOSE:To obtain a small-sized, lightweight device with high precision and high performance by performing digital processing including waveform generation, control over waveform shaping timing, etc. CONSTITUTION:An oscillation part 8 generates a signal with an optional period by a signal from a control part 11 and an address generation part 9 generates one address for the one-period oscillation of the oscillation part 8, increases the address, one by one, for every period continuously up to some value specified by a control part 11, and then returns to its original value. Namely, a waveform with an optional frequency stored in a waveform storage and generation part 10 is generated. Further, the phase of the start of electric feeding to the controller 7 is specified by the 1st address signal. Data from the waveform generation part 10 consisting of an ROM or RAM is passed to a D/A conversion part 12 to obtain an analog value, which is sent to an amplification part 13. The gain of the amplification part 13 is adjusted by the signal of the control part 11.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply simulator that generates various voltage waveform sounds, and is suitable for, for example, supplying various voltage waveforms as input power to a control device and fully testing the response thereof. be.

Conventionally, there has been a device shown in FIG. 1 as an insertion device.

In the figure, (1) is a frequency variable section whose output frequency can be adjusted, which is composed of a photographing device or a motor generator, etc., and (2) is, for example, a slide duck, etc., and the frequency variable section (1)
This is an output value adjustment section that adjusts the voltage value of the frequency signal sent out in steps.This adjustment section (2) sends out an output whose frequency and voltage value can be arbitrarily adjusted.

Therefore, (8) is an instantaneous interruption generating section such as a contactor, and the phase of the output sent from the output value adjusting section (2)?
The output of the phase detecting section (5) to be detected is designed to be capable of instantaneous interruption t0]' at any phase.

In addition, the output sudden change section (4) that receives the output consists of 5, for example, a contactor and a resistor.
fi, is designed to change drastically, and furthermore, the distortion generator (6) connected to this superimposes 7 harmonics,
The various waveforms generated by the distortion waveforms are used as an input power source for the operation of the total control device (7).
γ) is designed to carry out a full response test.

In other words, the simulation of the input power source for the operation of the control device (γn) as described above is performed by simulating voltages of various waveforms, assuming accidents in transmission and distribution lines, increase/decrease in loads, ON 7 OFF of large capacity loads, etc. The more the control device (7) becomes faster, more reliable, and more dense, the more detailed simulation becomes necessary. This is a t-test to see how much tolerance there is and what kind of response it shows.

However, in the conventional power supply simulator described above, mechanical devices are required for each occurrence of frequency adjustment, output value adjustment, instantaneous interruption, sudden change in output, distortion, etc., and the energy consumption is considerable. Furthermore, as the control device (7) becomes faster and more dense, more faithful simulation becomes necessary, and conventional products cannot provide accurate phase, accurate sudden change time, output value, etc.

Therefore, the present invention has been devised to eliminate the drawbacks of the conventional techniques described above.The operation part of the simulated waveform is obtained by using only one small signal digital signal, and the final output waveform is multiplied after digital-to-analog conversion. It is an object of the present invention to provide a power supply simulator which can obtain various output waveforms by making the power supply simulator wide, is small and lightweight, is energy saving, has high accuracy and is easy to handle.

An embodiment of the present invention will be described below with reference to FIG. In FIG. 2, (8) is an oscillation unit that determines the output period;
(9) is an address generating part that generates an address for reading each instantaneous value of the waveform storage generating part α0) according to the cycle of the oscillating part (8). A digital-to-analog conversion section that converts all the read digital values into analog values,
The converted analog value is amplified to a predetermined size by the amplifying section 08) and sent to the control device (γ).

(in is a control unit that performs overall control of this device, such as changing the oscillation cycle, changing the specified waveform instantaneous value of the readout start address, digital-to-analog conversion commands, and amplification degree commands.) , it is designed to send various output waveforms to the control device (a).

That is, in FIG. 2, the oscillation section (8) is controlled by the control section α
1) A signal of any period can be generated by the ERI signal, and the address generation section (9) is designed to generate one address 1g for one oscillation (one period) of the oscillation section (1). , this address is incremented by 1 in the next cycle. When the output increases to a certain value specified by the control unit Q(1), it returns to the initial value (also specified by the control unit (1η)). Every issue,
In other words, if a power supply simulation signal has an arbitrary frequency, for example, a sine waveform, and is stored in the waveform storage generator,
Hz, 50 Hz, etc. can be generated.

In addition, by specifying the first address No. 1g, the control device (7
), the phase at which energization starts, that is, the switch-on phase can be defined. The waveform storage generator (10) is a ROM or RAM, and the corresponding data read out from the address generator (9) is passed to the digital-to-analog converter (1). Control unit 0 of the data (waveform data) stored in the memory generation unit
1) when using rl RAM (random access memory), control unit (when using memory that has been written in advance with another device rather than writing with 11J), use ROM (
read-only memory) fully used.

These memories K rJ are the instantaneous values of the desired output waveform? Memorize continuously. Therefore, by selecting the value (digital value) to be input here, an arbitrary waveform of l:v can be obtained.

Then, the digital-to-analog converter ((2) is the digital instantaneous value t read out from the waveform storage generator 001
It is converted into an analog value and sent to the amplification section αB), where the gain (amplification degree) is adjusted and set by the control section (1 phantom) in order to change the magnitude of the output.

As described above, the present invention digitally processes waveform generation to waveform shaping timing control, etc., making the device smaller and lighter, with high precision, high performance, energy saving, and completely stationary ( In addition, a power supply simulator that is easy to operate can be obtained.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a conventional power supply simulator. FIG. 2 is a block diagram showing a configuration according to an embodiment of the present invention. (8): Oscillator section (9) Near address generation cry:
Waveform memory generation section (Ill): Control section (1@: Digital-to-analog conversion section (1B): Expansion section representative Kazunori Kuzuno -

Claims (1)

[Claims] Instantaneous value of output waveform? Continuously digitally stored
an a-type memory generation section, an address generation section that generates a companion address signal for reading out a value for the instantaneous value t analog quantity, and an oscillation section that defines the readout period. A power supply simulator comprising a control section that generates a command signal sound to output a predetermined output waveform to each of these sections.