JPS58218877A - Electric power source device with controlled pulse width - Google Patents

Abstract

PURPOSE:To obtain large electric power pulse output regardless of period of charging time by a method wherein outputs of two inverters are composed using a transformer, and moreover phase of oscillations between the mutual inverters are made to variable. CONSTITUTION:A timing pulse sent from an oscillating circuit 1 is delayed by fixed time by a delay circuit 3 to be transmitted to an oscillating circuit 2, and the oscillating circuits 1, 2 oscillate having the fixed phase difference mutually thereby. The inverters 4, 5 are driven by outputs of the oscillating circuits 1, 2, and outputs thereof are composed by the transformer T1. Width of the pulse induced in the secondary winding L3 of the transformer T1 relates only to the phase difference between the mutual inverters, and accordingly by controlling the phase difference thereof, pulse output having various widths can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The pulse width control rate source device of the present invention is capable of generating extremely short pulses with high power, and is mainly used for electrolytic generation of alumite, layer coloring, etc. The present invention relates to a pulse 1j/L source that is suitable for use as a source.

The general method for producing 1C alumite is to perform electrolysis using aluminum as an anode in a water bath such as oxalic acid or chromic acid, or to determine the thickness and color of the alumite film that forms on the surface of aluminum. In order to subtly change the voltage, etc., it is preferable to change the width of the DC power supply voltage used for electrolysis according to the necessary cost. .

Therefore, FIG. 1 shows the transient response of a commonly used transistor, and the delay time td, rise time tr,
Accumulation time (storage time) ts.

The first shift has a stand-up time tff, of which the first shift has the largest accumulation time ts. By the way, since the accumulation time ts represents the time at which the pace signal starts after the base signal is removed, no matter how short the pace signal application time is set, the output of the ten pulse widths will not be output. It is impossible to obtain it.

Since the storage time tends to lengthen as the current value increases, this problem is even more important in applications such as pulse reading, which requires a large amount of power and requires delicate pulse width control.

The invention was proposed in view of the above points, and was developed by using two inverter output transformers and changing the oscillation phase between the inverters. It is an object of the present invention to provide a pulse width control power supply device that is capable of obtaining an input power pulse output with an extremely short pulse 1 from a wide pulse (Nayuty 54196) regardless of the size of the accumulation time. It is something.

Is this invention according to the drawings shown in the examples? FIG. 2, which will be described in detail, is a block diagram of an embodiment of the present invention. In the figure,
1 and 2 are oscillation circuits, respectively! 71 Among these, the oscillation circuit 2 in particular obtains a timing signal from a part of the oscillation output of the oscillation circuit 1 through a delay circuit 3 such as a timer or a one-shot multi-channel circuit, and the delay time of the delay circuit 3 is k
By using OJ variation, the phase difference between the oscillator circuits 1 and 2 can be determined by the history of the phase difference. 4 and 5 are square wave inverters (hereinafter simply referred to as "inverters") whose drive signals are obtained from the oscillation circuits 1 and 2, respectively 9, and their output terminals are core 'I''l, T*v?- 4. The primary trunk wire is wound internally and is connected to L2.In the figure,
Since this is a so-called notschful type inverter, the winding 1. The midpoint of ,,l, is the first connected to the positive power supply, but the output of this type of inverter is not limited,
It can also be applied to inverters using other types of VCs. It is rotated fc υ, - again core T,,'r!
It can also be used in the same way by connecting in series secondary windings that are individually wound. 6 indicates a rectifier, which can be omitted if bipolar pulse output is obtained.

Figure 3 shows the voltage waveform at the valley.
VL is the voltage applied to the primary winding, LtK (inverter output) % VL is the induced power of the secondary winding, V
Q is a voltage waveform after passing through a rectifier (full wave rectification) 6.

Also, Figure 4 shows the parts around the oscillator circuits 1 and 2, where a is the timing pulse sent from the excavation circuit l, and b
are output signals of delay circuit 3, c and d are excavation circuits, 1,
This is the output signal of No. 2.

Next TF - To explain the invention in detail according to FIGS. 3 and 4, the nfC timing pulse a sent from the oscillation circuit 1 is transmitted to the oscillation circuit 2 with a delay of one time τ by the delay circuit 3, and thereby the oscillation circuit 1.2 will oscillate with a phase difference of one foot from each other. Next, inverter 4
, 5 are driven by the output of the oscillation circuit 1.2, and are shown in FIG.
L3. However, when the output voltages of inverters 4 and 5 have opposite polarities, the voltages induced in the secondary winding LseC cancel each other out, and the output voltages are not dusty and both are positive. or in a negative period V
As shown by Ls, a pulse output having a width corresponding to the phase difference between the inverters is obtained. By the way, inverters 4 and 5
The output waveform of the inverter includes a part due to the accumulation time of the transistor used as the switching element, or as mentioned above, the pulse width induced in the secondary winding m LM is due to only the phase difference between the inverters. Because it is related to
Phase difference'! By setting -1'J odd, it is possible to obtain a pulse with a much wider width than the storage time unique to the switching element. Naturally, the effects of the rise and rise times of the switching elements are included, but since these are small compared to the storage time, their effects can be ignored.

As described above, in the uninvented pulse width control % source device, the first oscillation signal oscillates at the same period and with a constant phase difference sound. a second inverter; The second inverter outputs are all wound on separate cores, respectively connected to the primary winding, and the previous He is wound on the secondary winding or individual cores, which are in magnetic coupling with the two cores. Pulses can be output from the series connection of the secondary windings directly or through a rectifier, and the phase difference between the inverters changes. Even if a long one is used, it is possible to obtain pulses of extremely short width.

Therefore, it is most suitable for use as electrolytic corrosion for producing alumite, coloring, etc.

(Note) Since it is possible to perform high-frequency oscillation using a Darlington-type (long storage time) high-power transistor, it is possible to provide Iriya's amount of pulse power at a low cost.

? -1 Low voltage and large current pulse output can also be easily obtained.

2) It has excellent effects such as low power loss and high efficiency in the circuit.

It goes without saying that the kameei device of the present invention can be used for a wide range of other purposes other than producing and coloring alumite.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the transient response of a transistor, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIGS. 3 and 4 are diagrams explaining its operation. 1.2...Oscillation circuit, 3...Continuous firing circuit%4゜5...Inverter, 6...Rectifier, L+, L2... ...Primary winding, L, ...
...Secondary winding s ll, l '12... Core 3rd 4th Fig. 2

Claims (1)

[Claims] The first . The second inverter is fully equipped, the first inverter.
The second inverter output is magnetically independent from the first inverter output.
are added to the primary windings wound around the second core, respectively, and the first . A pulse width control power supply having a pulse width control power supply having a pulse output tray before a secondary winding which is magnetically coupled with a second core. .