JPS60101421A - High voltage generator - Google Patents

Abstract

PURPOSE:To provide a device which is inexpensive to manufacture and performs reliable simultaneous discharge, by a method wherein spark discharge is simultaneously caused at two burners through a single booster transformer. CONSTITUTION:A charging circuit which feeds a charging current to a capacitor 4 by means of the one half cycle of an A.C. power source 1 is formed with the A.C. power source 1, a rectifier 2, a control resistor 3 and the capacitor 4. A control rectifier 5 for discharge control, such as shockley diode, sidac, a primary coil 6a of a booster transformer 6, being an inductive load, are connected in parallel to the capacitor 4. Further, a rectifier 7 for blocking an inverse voltage is connected thereto. Discharge electrodes 9 and 10 are respectively connected to the output terminals of a secondary coil 6b of the booster transformer 6. Two burners 11 and 12, positioned opposite to the discharge electrodes 9 and 10, respectively, are electrically connected. (Chassis connection may be approval.) This permits discharge to be caused at the two burners through a single booster transformer, and reduction of a cost.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to high voltage generators for combustion appliances.

Configuration of conventional examples and their problems Conventional high-voltage generators for combustion appliances require two high-voltage generators to be used when discharging electricity to two burners in combined combustion appliances such as hot water supply, space heating, and reheating. Two high-voltage generating transformers were installed and discharged each time, which was expensive.

FIG. 1 shows a schematic diagram of the configuration of a conventional example.

1 is an AC power supply, 2 is a rectifier, 3 (l'i limiting resistor, and a capacitor made by 4 manufacturers) constitutes a charging circuit that supplies charging current to the capacitor 4 in one half cycle of the AC power supply 1. A control rectifier 5 for discharge control (for example, a Clay diode or Zydac) and an inductive load (r) (primary coil 6N of a voltage transformer 6) are connected to the rectifier 5 for reverse voltage blocking.

Another back pressure transformer 8 is connected in parallel with the step-up transformer 6.
1&connect the primary coil 82L.

Discharge electrodes 9 and 10 are provided at the output terminals of the secondary coils 6b and 8b of the two R1 voltage transformers 6 and 8, respectively, and the discharge is caused to flow into the Z-conductors 11 and 12 connected to the ground side of the output terminals. Configure it as follows.

As described above, conventionally, when discharging to two barbs 1 and 12, step-up transformers 6 and 8 were generally provided, which was disadvantageous in terms of cost.

OBJECTS OF THE INVENTION In view of the above-mentioned problems, the present invention aims to provide a high-voltage generator capable of discharging two burners at low cost.

Structure of the Invention To achieve this object, a charging circuit supplies a charging current to a capacitor in one half cycle of an alternating current power source, and a control rectifier for controlling discharge connected in parallel to said capacitor and said capacitor through an inductive load. A discharge electrode is provided at each secondary output terminal of the inductive load, and the discharge is caused to flow through the two burners.

With this configuration, it is possible to provide discharge fields to two burners with one step-up transformer, and the purpose can be achieved at low cost.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a schematic diagram of the configuration of the present invention.

1 is an AC power supply, 2 is a rectifier, 3 is a control resistor, and 3 is a capacitor. During one half cycle of AC power supply 1, capacitor 4
A charging circuit is configured to supply charging current to. A discharge control control rectifier 5 (for example, a Shockley diode, a SIDAC, etc.) and a primary coil 6a of a step-up transformer 6, which is an inductive load, are connected in parallel to the capacitor 4. 7
is a reverse voltage blocking rectifier.

Discharge electrodes 9 and 10 are connected to each of the output terminals of the secondary coil 6b of the step-up transformer 6.

Two burners 11 and 12 are provided opposite to the discharge electrodes 9 and 1o, with the burners electrically connected to each other (chassis connection is possible).

To explain the operation, a charging current flows through the rectifier 2 and the limiting resistor 3 to the capacitor 4 as shown in A in the figure, and charges are stored. When the L voltage at both ends of the capacitor 4 exceeds the breakover voltage of the discharge control control rectifier 6 (Shockley diode, etc.), the charge stored in the capacitor 4 is transferred to the primary coil 6 of the step-up transformer 6, as shown in Figure B. The current flowing through the secondary coil 6a causes a boosted induced current to flow through the secondary coil 6b, resulting in a spark discharge.

FIG. 3 shows the high voltage output waveform of the conventional example. The output voltage waveform 13 is between the discharge electrode 9 and the burner 11 (Figure 3A), and the output voltage waveform 14 is between the discharge electrode 1o and the burner 12 (Figure 3B).
generates a spark discharge.

FIG. 4 shows the high voltage output waveform of this embodiment.

The step-up transformer 6 of this embodiment has a larger step-up ratio than the conventional example, and the output voltage waveform is 15 when the discharge gap is set between the discharge electrodes 9 and 1o provided at the output terminal of the secondary coil 6b. Become.

Therefore, when the discharge electrode 9 and the burner 11 and the discharge electrode 10 and the burner 12 are used as discharge gaps for spark discharge, the output voltage waveform becomes 16, and since spark discharge occurs through the two discharge gears, the total output voltage waveform 15 is halved. The state will be as follows.

Therefore, in order to obtain the same output voltage for each discharge gap as in the conventional case, the step-up ratio of the step-up transformer 6, the capacitance of the capacitor 4, the limiting resistor 3, etc. may be optimally set.

Note that the same objective can be achieved by reversing the connection positions of the capacitor 4 and the discharge control control rectifier 5.

Effect of the invention As described above, the present invention has the following effects.

(1) Ascension 1] 1 - One lance can simultaneously discharge the varnish spark to two burners.

(2) Since only one step-up transformer is required, the cost is low.

(3) Since two burners are used as spark discharge paths to divide one high voltage into approximately two equal parts and discharge, simultaneous discharge can be ensured.

(4) When there are two step-up transformers as in the past, there were cases where the gap on one side was large and the discharge did not occur, but the present invention does not have this problem.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram showing a conventional example, Fig. 2 is a schematic configuration diagram showing an embodiment of the present invention, Figs. 3 (A) and (B) are high voltage output waveform diagrams of the conventional example, and Fig. 4 is a high voltage output waveform diagram in one embodiment of the present invention. 1-AC power supply, 2...controller, 3...
Control resistor, 4... Capacitor, 5...
Control rectifier for discharge control, 6...Step-up transformer (
(inductive load), 9, 10...discharge electrode, 11.
12...Burna. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3

Claims (1)

[Claims] A charging circuit that supplies a charging current to a capacitor in one half cycle of an AC power supply, a control rectifier for controlling discharge connected in parallel to the capacitor, and an inductive load (-) discharges the capacitor and charges the inductive A high voltage generator configured to provide a discharge electrode at each secondary output terminal of a load and discharge through two burners.