JPS5862924A - Large power damping oscillation pulse generator - Google Patents

Abstract

PURPOSE:To remarkably reduce power consumption, by combining a diode, and a secondry energy stoage capacitor and transferring damping energies to this capacitor. CONSTITUTION:When a switch 5 is opened, a voltage of a capacitor 4 is charged at a high voltage with a high voltage powers supply 1 and this voltage is held. When the switch 5 is closed in this state, the energy stored in the capacitor 4 performs series resonance with the capacitor 4, an inductive load 7, and a secondary energy storage capacitor 9. The current with this series resonance flows to the capacitor 9 always in the same direction via the switch 5, the load 7, diodes 8a-8d from the capacitor 4 and the energy of the capacitor 4 is gradually transferred to the capacitor 9. Further, a switch 10 is closed to actuate an energy feedback circuit 11 and the energy in the capacitor 9 is fed back to the power supply 1, allowing to obtain a damping oscillation pulse very efficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-power damped vibration pulse generator capable of attenuating vibration pulses with low loss when generating high-power damped vibration pulses.

Figure 1 shows the connections of a conventional high-power damped vibration pulse generator, in which (1) is a high-voltage power supply, (2) is a charging coil, (3) is a charging stop diode, and (4) is a high-voltage power supply.
is an energy storage capacitor, (5) is a switch, (6
) is a damping resistor, and (7) is an inductive load.

In such a configuration, when the switch (5) is open, the voltage of the capacitor (4) is charged to a higher voltage than the high voltage power supply (1) via the charging coil (2) and the diode (3), and the voltage of the capacitor (4) is This prevents backflow and maintains high pressure. When the switch (5) is closed in this state, the energy stored in the capacitor (4) causes series resonance between the capacitor (4) and the inductive load (7).

Since this series resonance persists when the circuit is lossless, a resistor (6) is connected in series between the capacitor (4) and the inductive load (7) as a means of obtaining a damped vibration pulse. By connecting this resistor (6), the energy of the series resonance is gradually consumed by the resistor (6) to obtain a damped vibration pulse. FIG. 2 shows the current waveform of a conventional damped vibration pulse, and equation (1) is the equation for this current (j>).

Here, α is the attenuation constant, α−1・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・－・・・+2+L W is the angular frequency, R is the line resistance of the load (7) and the attenuation resistance (combined resistance value of the button), L is the inductance of the load (7), and C is the capacitor (4). ), and E is the charging voltage of the capacitor (3). Also, when comparing the line resistance of the load (7) and the resistance value of the attenuation resistor (6), the resistance value of the attenuation resistor (6) is large, so the load Ignoring the resistance in (7), the power consumed by the attenuation resistor (6) is determined by Equation (4).

P-Rfldt・・・・・・・・・・・・・・・
・・・・・・・・・・・・Curved surface・・・・・・－・Song (41
By substituting equation (1) into equation (4) and substituting equations (2) and (3) into equation (5), we can obtain the damping resistance (6) from equation (6). The power consumed by the capacitor (4
) is equal to the amount of energy stored in ).

Above equations (11, (21,
) K is gradually consumed to form a damped vibration pulse.

Therefore, the energy consumed by the damping resistor (6) is::1. Therefore, the resistor (6) generates heat, and in order to dissipate this heat, the device becomes larger and at the same time, the efficiency of transmitting energy to the load (7) becomes very poor. Ta.

In order to eliminate such drawbacks of the conventional technology, the present invention combines a diode and a secondary energy storage capacitor, and the present invention is capable of storing secondary energy without dissipating the energy of the energy storage capacitor in a resistor as in the prior art. An embodiment of the present invention is shown in FIG. 3 and will be described in detail below.

In Figure 3, (8a) = (8b)t (8c) and (8d) are diodes connected to the secondary energy storage capacitor (9) so as to perform full-wave rectification (
II is an energy feed pack switch, and 011 is an energy feedback circuit.

In this configuration, when the switch (5) is open, the voltage of the capacitor (4) is charged to a high voltage from the high voltage power supply (1) via the charging coil (2) and the diode (3), and the voltage of the capacitor (4) is charged to a high voltage through the charging coil (2) and the diode (3). (3) prevents backflow and maintains high pressure. When the switch (5)' is closed in this state, the energy stored in the capacitor (4) resonates in series with the capacitor (4), the inductive tape load (7), and the secondary energy storage capacitor (9). This series resonance occurs when the voltage of the capacitor (4) is positive, the capacitor (4), switch (5), load (7), diode (8)
a), flows to the capacitor (4) through the path of the capacitor (9) and the diode (crystal), and in the case of reverse potential, the flow flows to the capacitor (4).
), diode (8:), capacitor (9), diode (8b), load (7), and switch (5). Therefore, since a current always flows in the same direction through the secondary energy storage capacitor (9), the energy of the capacitor (4) is gradually transferred to the secondary energy storage capacitor (9). Voltage of capacitor (4) and secondary energy storage capacitor (9)
) match or the voltage of the secondary energy storage capacitor (9) increases, the diode (am),
Since (sb)t (sc) (8d) has a reverse potential, a damped vibration pulse is generated.

Find the current (4L) that flows through the load (7)K during this operation.

C1・C2 Also, the current flowing to the secondary energy storage capacitor (ic
, ) Here, W is the angular frequency, Bo is the charging voltage of the capacitor (4), and - is the switch (
5) Voltage of the secondary energy storage capacitor when closed, L is the inductance of the load (7), and CI is the capacitor (4)
C1 is the capacity of the secondary energy storage capacitor (9). However, 1 hour t is the time from O to /. At this time, the voltage (ec,) of the capacitor (4) is 0th
It becomes type 0.

e Once Mu group 9 shi red + work at l + K 1 + K (lEo
tl-jEozll・coswt ・・−・−−−
” Q (Similar to 1, secondary energy storage coredenser (9)
The voltage (ec, ) becomes the αυth equation lEo*l+KIEo*l-Cz-1+Kl+1181111-IEO! I) l-cos2wt −
--1...Q1 In the above Tsukuda and formula 09, K is the capacitance ratio of the capacitor (4) and the secondary energy storage capacitor (9), which is 2.・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・α2 Therefore, the (7)th, (81,
(91, (l Meisen, and the conditions of 'BO, > Pio, and K > 1 are required as the conditions for the like pain damping oscillation that can be seen from the formula 0. Under the above conditions, the current flowing through the load (7) (
L) The flow shape is as shown in Figure 4.

Also, the waveform of the voltage (eC, > of the capacitor (4) is
As shown in the figure.

In addition, diodes (8a) (8b) (8c) and (8d
) becomes a reverse voltage (T/) is the time when the current flowing through the load becomes zero, and at this time the voltages of the capacitor (4) and the secondary energy storage capacitor (9) are equal and this voltage (E/ ) is m- E/ in formula 03 is the secondary energy storage capacitor (9)
Since the final voltage is Fi12Cz-B o? C＞゛・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・－
.... According to α gradient equation 04, all the energy in the capacitor (4) is transferred to the secondary energy storage capacitor (9).

Therefore, after the energy has been transferred to the secondary energy capacitor (9), the switch aO is closed to operate the energy feedback circuit 0υ and feed back to the high voltage power supply (1). Therefore, it is possible to obtain damped vibration pulses very efficiently. can. However, for convenience, a diode (8
Although the voltage drop loss and line drop of the circuit in (8b), (8c) and (8d) were reduced to zero, this does not affect the basic efficiency improvement of the present invention.

The present invention can be applied to inductive loads that require large current vibration pulses, such as ultrasonic flaw detection equipment.

As described above, in the high power damped vibration pulse generator according to the present invention, damping energy can be stored in the secondary energy storage capacitor using a diode, and by feeding back this energy to the high voltage power supply,
There is an advantage that the power consumption of this type of device can be greatly reduced.

[Brief explanation of the drawing]

Fig. 1 is a connection diagram of a conventional high power damped vibration pulse generator, Fig. 2 is a current waveform diagram in the conventional high power damped vibration pulse generator, and Fig. 3 is a diagram of a high power damped vibration pulse generator according to the present invention. A connection diagram, FIG. 4 is a current waveform diagram in the high power damped vibration pulse generator of the present invention, and FIG. 5 is a voltage waveform diagram of the capacitor of the high power damped vibration pulse of the present invention. In the figure, (1) is a high-voltage power supply, and (2) is a charging coil. (3) is a diode, (4) is a capacitor, (5) is a switch, (6) is a resistor, (7) is a load, (8a) (8
b) (8c) and (8d) are diodes, (9) is a capacitor, and al is a switch. Ql) is an energy feedback circuit. In FIG. 2, the same or corresponding parts are designated by the same reference numerals. Agent Shin Kuzuno - Figure 1 Figure 2 Figure 311

Claims (1)

[Claims] A high-voltage power supply circuit, one end of a coil is connected to the positive polarity side of this power supply circuit, the anode of a diode is connected to the other end of this coil, and one end is connected to the cathode of this diode. Connect the negative polarity side of the power supply circuit to the other end of the capacitor 1 of 1 and 2. One end of the capacitor (diode connection side)
and an inductive load with one end connected to the other end of the capacitor through a switch;
The switch is connected to the second capacitor for full-wave rectification by two diodes, and is connected directly to the positive terminal or negative terminal of the second capacitor and to the energy feedback circuit, and the switch is connected directly to the energy feedback circuit. A high-power damped vibration pulse generator characterized by being connected to a circuit and the high-voltage power supply circuit so as to store energy.