JPH0564105A - Uninterruptible power supply system for fully solid-state television transmitter - Google Patents

Abstract

PURPOSE:To realize the uninterruptible power supply system of a fully solid- state television transmitter in which broadcast is continued even after a commercial power supply is failed without affecting on the characteristic of a broadcast wave with small sized capacity configuration. CONSTITUTION:An uninterruptible power supply device 1 is provided with a battery 7, a rectifier charger 3 rectifying a commercial power supply and charging the battery, an inverter 4 inverting the DC power of the battery into a single phase AC, a 2-branch iron-resonant transformer 6 synthesizing two AC powers being a commercial power supply and an inverter output and a diode dropper 5 stepping down a DC voltage of the battery to a proper value. Furthermore, the full solid-state television transmitter 8 is provided with a transistor power amplifier power supply 13 used to drive a transistor power amplifier 14 receiving a power resulting from transforming and rectifying the commercial power supply and the power of the battery and with a small sized fan 11 driven by the power of the 2-branch iron-resonant transformer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an all-solid-state television transmitter, and more particularly to a non-stop power supply system for continuing broadcasting in the event of a commercial power failure.

[0002]

2. Description of the Related Art Conventionally, three types of systems shown in FIGS. 3 to 5 have been used as non-stop power supply systems for all-solid-state television transmitters. The example shown in FIG. 3 is a continuous wave power supply system that supplies AC power to an all-solid-state television transmitter even during a commercial power failure by a constant voltage constant frequency power supply (CVCF power supply). In FIG. 3, the commercial power input to the constant voltage / constant frequency power supply device 21 is rectified by the rectifier / charger 3 via the bypass switch 22 and converted into DC power. This DC power is converted back into AC power of commercial frequency again by the inverter 4, while charging the storage battery 7. When the commercial power fails, the charged storage battery 7 is discharged, is converted back into the AC power of the commercial frequency by the inverter 4, and is supplied to the all-solid-state television transmitter 23.

Therefore, the all-solid-state television transmitter 23
Receives AC power of commercial frequency regardless of the state of receiving commercial power. In the all-solid-state television transmitter 23, AC power is supplied to the transistor power amplifier power supply 24 via the three-phase insulation transformer 25, and DC power is supplied from the transistor power amplifier power supply 24 to the transistor power amplifier 14. There is. In addition, the input commercial power is supplied to the exciter 9 and the TX controller 10 via the single-phase insulating transformer 26.
Is supplied with single-phase AC power. The blower 17 cools the transistor power amplifier 14 and the transistor power amplifier power supply 24. In the case of this example, the blower can be operated at full output even when the commercial power supply is interrupted.

FIG. 4 shows the DC power supplied from the transistor power amplifier power supply 24 at the DC power input to the transistor power amplifier 14 of the all-solid-state television transmitter 39.
This is a system in which the DC power supplied from the storage battery 7 of the uninterruptible power supply 31 through the diode dropper 35 is coupled by the diode 40 and the power is directly supplied from the storage battery 7 to the transistor power amplifier 14 when the commercial power supply is interrupted. In this example, the exciter 9 of the transmitter supplies AC power from the small-capacity inverter 36 of the uninterruptible power supply 31, and the TX controller 10, which is the control unit of the transmitter, directly supplies DC power from the storage battery 7. There is.

In this example, a small fan 11 is used to operate some transistor power amplifiers when the commercial power supply fails.
In this case, the power for driving the fan is supplied from the storage battery 7 by the inverter 38 prepared exclusively for driving the fan. Therefore, the transmitter can be operated for a long time even with reduced power operation. In the figure, 33 is a power transformer, 34 is a rectifier / charger, 37 is a bypass switch, 17 is a blower for cooling during normal operation, and 41 is DC power supplied from a storage battery when commercial power fails. Is a DC / DC converter for supplying the bias power to the transistor power amplifier.

FIG. 5 shows a power supply 13 for a transistor power amplifier.
Is a DC / DC converter of a DC two-input type, and when receiving commercial power, DC power is supplied through the power transformer 15 and the three-phase full-wave rectifier 16 of the transmitter 52. On the other hand, when the commercial power supply fails, DC power is supplied from the storage battery 7 of the uninterruptible power supply 51 to the transistor power amplifier power supply 13 via the diode dropper 5. The exciter 9 and the TX controller 10 are supplied with AC power via the shunt iron resonance transformer 6 that combines commercial power with AC power obtained from the storage battery 7 via the inverter 4 in the uninterruptible power supply device 51. It The cooling blower 17 is driven by commercial power. In this example, the transmitter can output the full power at the time of the commercial power failure, but the operation time is limited because the blower is not driven.

[0007]

The conventional non-stop wave power supply systems of the respective systems have the following problems. In the continuous wave power supply system using the constant voltage constant frequency power supply device shown in FIG. 3, all the load current flows through the charger and the inverter, so that the capacity and size of each device increase, and
There is a problem that the initial cost also increases. or,
In the uninterruptible power supply system based on diode coupling at the DC power supply input part of the transistor power amplifier shown in FIG. 4, the transistor power amplifier collector power supply of low voltage and large current is provided in a relatively long distance from the uninterruptible power supply to the transmitter. It was necessary to wire with a cable. For this reason, the effect of voltage drop due to the loss in the cable is large, the cable needs to be thick to minimize the loss, construction work is difficult, noise is easily superimposed on the cable, and the characteristics of the broadcast wave are There is a problem that is greatly affected by.

In order to solve these problems, the uninterruptible power supply system shown in FIG. 5 solves the problems of the two uninterruptible power supply systems described above to reduce the capacity, and affects the characteristics of broadcast waves. Can be relaxed. However, in this system, the transistor power amplifier and the blower for cooling the power supply unit cannot be operated, so that the maximum length is about 5
There is a problem that operation can be continued only for about a minute. An object of the present invention is to provide a non-stop power supply system for an all-solid-state television transmitter, which can be configured with a small capacity, has no influence on the characteristics of broadcast waves, and can continue broadcasting even after a power failure of a commercial power supply. To provide.

[0009]

According to the system of the present invention, an uninterruptible power supply is used for a storage battery, a rectifier / charger for rectifying a commercial power source to charge the storage battery, and DC power of the storage battery is converted into single-phase AC. It is composed of an inverter, a shunt iron resonance transformer that combines two AC powers of commercial power and inverter output, and a diode dropper that steps down the DC voltage of the storage battery to an appropriate value. The power supply for transistor power amplification that drives the transistor power amplifier by inputting the power obtained by transforming and rectifying the commercial power supply and the power of the storage battery, and the small fan driven by the power of the shunt iron resonance transformer are provided. Further, the uninterruptible power supply may be provided with a VVVF inverter connected to a storage battery, and a small fan provided in the all-solid-state television transmitter may be driven by the output of the VVVF inverter.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a system diagram of an uninterruptible power supply system according to a first embodiment of the present invention, and the basic configuration is the same as that shown in FIG. That is, commercial power is input to each of the uninterruptible power supply 1 and the all-solid-state television transmitter 8. The commercial power input in the uninterruptible power supply 1 is branched, and one is input as one input of the shunt iron resonance transformer 6. The other is converted into direct current by the rectifier / charger 3, charges the storage battery 7, and is inversely converted into alternating current by the inverter 4, and is input to the other input of the shunt iron resonance transformer 6. The output of the shunt iron resonant transformer 6 supplies the transmitter 8 with single-phase AC power and the exciter 9 and the TX controller 10. Further, a part of this output supplies electric power to the small fan 11 via the electromagnetic contactor 12.

The storage battery 7 is connected to the transistor power amplification power source 13 of the transmitter 8 via the diode dropper 5. Further, the three-phase AC power input to the transmitter 8 is converted into DC by the power transformer 15 and the three-phase full-wave rectifier 16 and supplied to the transistor power amplifier power supply 13. The transistor power amplifier power supply 13 supplies stable DC power to the transistor power amplifier 14. Also, transmitter 8
The commercial electric power input to drives the cooling blower 17.

In this structure, if commercial power is cut off now, the storage battery 7 starts discharging. The direct current power of the storage battery 7 is first converted into alternating current through the inverter 4, and the single-phase alternating current power is supplied to the transmitter 8 through the shunt iron resonance transformer 6 as is the case when the commercial power is received. On the other hand, the DC power of the storage battery 7 is adjusted to an appropriate voltage by the diode dropper 5, and then the power source 13 for the transistor power amplifier of the transmitter 8 is adjusted.
To the transistor power amplifier 14 after being stabilized and supplied with a predetermined DC power.

After the power failure of the commercial power, the storage battery 7 continuously operates at full output. In this case, since the cooling blower 17 does not operate, the operation time is 5 minutes at maximum. After a lapse of 5 minutes, the TX controller 10 outputs a stop command to the transistor power amplifier power source 13 except for a part thereof. The small fan 11 connected to the single-phase AC power supplied at the same time is started by turning on the electromagnetic contactor 12. That is, after the lapse of 5 minutes after the power failure, the transistor power amplifier 14 of the transmitter 8 is stopped except for a part thereof, so that the cooling by the small fan 11 is possible and the operation can be continued. In this case, since the continuous operation time depends only on the storage battery capacity, it is possible to compensate for a long blackout even when the emergency engine generator fails in the remote area.

FIG. 2 is a system diagram of the second embodiment of the present invention. Here, a dedicated VVVF inverter 2 is provided to drive the small fan 11. The VVVF inverter 2 is supplied with DC power from the storage battery 7, is inversely converted into single-phase AC, and supplies power to the small fan 11 of the transmitter 8. Five minutes after commercial power failure, T of transmitter 8
A control command is output from the X controller 10 to the VVVF inverter 2, and the small fan 11 is activated. At this time,
The TX controller 10 issues a control command to the VVVF inverter 2 in accordance with the number of transistor power amplifiers 13 that continue to operate, and the VVVF inverter 2 controls the rotation speed of the small fan 11 so that optimum cooling can be performed.

[0015]

As described above, according to the present invention, broadcasting can be continued at full output for a few minutes after a power failure of a commercial power source, and after a few minutes, a small fan is started while reducing power operation. , And has the effect of being able to continue broadcasting.
Further, there is an effect that the capacity is smaller than that of a non-stop power supply system using a constant voltage and constant frequency power supply.

[Brief description of drawings]

FIG. 1 is a system diagram of a first embodiment of a non-stop power supply system of the present invention.

FIG. 2 is a system diagram of a second embodiment of the present invention.

FIG. 3 is a system diagram of an example of a conventional non-stop power supply system.

FIG. 4 is a system diagram of another conventional example.

FIG. 5 is a system diagram of still another conventional example.

[Explanation of symbols]

 1 uninterruptible power supply 2 VVVF inverter 3 rectifier / charger 4 inverter 5 diode dropper 6 shunt iron resonance transformer 7 storage battery 8 all-solid-state television transmitter 11 small fan 12 electromagnetic contactor 13 transistor power amplification power supply 14 transistor Power amplifier

Claims (2)

[Claims] 1. An uninterruptible power supply and an all-solid-state television transmitter, wherein the uninterruptible power supply includes a storage battery and a rectifier / charger for rectifying commercial power to charge the storage battery. An inverter that converts the DC power of the storage battery into a single-phase AC, a shunt iron resonance transformer that combines two AC powers of commercial power and inverter output, and a diode dropper that steps down the DC voltage of the storage battery to an appropriate value, The all-solid-state television transmitter is a power source for transistor power amplification that drives a transistor power amplifier by inputting power obtained by transforming and rectifying commercial power and power of the storage battery, and power of the shunt iron resonance transformer. A non-stop power supply system for an all-solid-state television transmitter, which is equipped with a driven small fan. 2. An uninterruptible power supply and an all-solid-state television transmitter, wherein the uninterruptible power supply includes a storage battery and a rectifier / charger for rectifying commercial power to charge the storage battery. An inverter that converts the DC power of the storage battery into single-phase AC, a shunt iron resonance transformer that combines two AC powers of commercial power and inverter output, a diode dropper that steps down the DC voltage of the storage battery to an appropriate value, and the storage battery The all-solid-state television transmitter includes a transistor power amplification power supply for driving a transistor power amplifier by inputting power obtained by transforming and rectifying a commercial power supply and power of the storage battery, A non-stop power supply system for an all-solid-state television transmitter, comprising a small fan driven by the output of a VVVF inverter.