JPS60152233A - Power source controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply control device for remotely turning on or off a main power supply, particularly an alternating current power supply, in various electronic devices.

[Background technology and its problems]

Generally, AC power sources are widely used as main power sources for various electronic devices. Conventionally, when the main power source is turned on or off by remote control, an externally controllable switch means such as an AC relay, a DC relay, or a solid state relay is provided on the main power line, and a switch for remote control is used. The above switch means is controlled externally.

By the way, in a power supply control device using an AC relay, the AC
Remote control can be achieved with a simple configuration in which a switch for remote control is drawn out from the main power line so that alternating current flows through the relay coil of the relay. is applied as is, so it is extremely difficult to ensure safety in handling.

In addition, in power supplies using DC relays and solid state relays,
A full DC power supply is required to drive all of the DC relays and solid state relays, and this DC power supply circuit always consumes power, which poses a problem in that lowering the power consumption of the entire device is hindered.

Furthermore, when controlling the switching means of the main power line externally using a remote control switch, a power transformer is used to connect the remote control switch to the main power supply in order to ensure safety in use. In addition to insulating it from the line, the switch means is driven at a low voltage, and a power transformer with a primary side voltage of approximately 100 to 240 VAC is required, making the entire device large and heavy. There was a problem.

[Purpose of the invention]

Therefore, in view of the above-mentioned conventional problems, the present invention insulates a remote control switch from the main power line to ensure stability in use, as well as to reduce the size and weight of the entire device and reduce power consumption. The present invention provides a power supply control device with a new configuration that allows for complete electrification.

[Summary of the invention]

A power supply control device according to the present invention has a rectifier circuit connected via a capacitor between a pair of power input terminals to which AC power is supplied, and a rectifier circuit connected between the power input terminal and a power output. an insulated switch means that is provided on the piezoelectric power line connecting the terminal and is externally controllable; an insulated DC-DC converter to which the rectified output from the rectifier circuit is supplied; and a drive power source that uses the output of the DC-DC converter. The device is characterized in that it is completely equipped with a remote control switch for externally controlling the switch means, and the AC power supplied to the power input terminal is outputted from the power output terminal via the switch means. be.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the power supply control device according to the present invention will be described in detail with reference to the drawings.

In the embodiment shown in FIG. 1, a pair of power input terminals 1,
2 is supplied with an AC power supply ACIN of AC 10 OV to 24 OV 15°/60 Hz.

The power supply control device of this embodiment has the above-mentioned AC power supply ACIN.
A rectifying circuit 10 is connected via a capacitor 3 between a pair of power input terminals 182 to which current is supplied, and a main power line is provided that connects the pair of current input terminals 1 and 2 and the power output terminals 4 and 5. solid state relay 20 and the rectifier circuit 10
DC-DC converter 30 to which rectified output is supplied by
and a remote control switch 40 that externally controls the solid state relay 20 using the output from the DC-DC converter 30 as a driving power source.

The rectifier circuit 10 includes four bridge-connected diodes 11, 12, 13, and 14, and the connection point between the cathode of the first diode 110 and the anode of the third diode 13, that is, one input terminal is It is directly connected to one of the pair of power input terminals 1 and 2, and the connection point between the cathode of the second diode 12 and the anode of the fourth diode 14, that is, the other input terminal is connected to the other power input terminal 2 with a resistor. 7 and the capacitor 3 through a series circuit. Further, the rectifier circuit 10 has a connection point between the anodes of the first and second diodes 11.12, that is, one output end, and a connection point between the cathodes of the third and fourth diodes 13.14, that is, the other end. Zener diode 15 and smoothing capacitor 1 are connected between the output terminal of
6 are connected in parallel.

In the rectifier circuit 10 configured as described above, when the AC power supply ACIN is supplied to the pair of power input terminals 1 and 2, the capacitor ? The passing current of 3 is rectified by the first to fourth diodes 11, 12, 13. Then, the voltage of the above AC power supply ACIN (AC
Regardless of I 00v~240V), it is always constant (e.g. 6
(approximately V) rectified output is obtained between the output terminals.

The rectifier circuit 10 is an oscillation circuit in which the anode side of the Zener diode 15, that is, one output terminal is the DC-DC converter 30. It is connected to the emitter of the constituent transistor 31 via a resistor 32, and! The cathode side, ie, the other output end, of the Zener diode 15 is connected to the center tap of the primary winding 36p of the isolation transformer 36 constituting the oscillation circuit.

Further, in the DC-DC converter 3o, the collector of the oscillation transistor 31 is connected to one end of the primary winding 36p of the isolation transformer 36, and the base of the transistor 31 connects to a parallel circuit of the resistor 33 and the capacitor 3i. The secondary winding 36 of the isolation transformer 3G is connected to the other end of the primary winding 36p through the secondary winding 36p, and further includes a resonant capacitor 35 connected between both ends of the secondary winding 36p.
A rectifier diode 37 and a smoothing capacitor 38 are connected between both ends of S.
It has a configuration in which they are connected in series.

In this DC-DC converter 30, the transistor 31 of the oscillation circuit performs an oscillation operation at, for example, about 30 KHz, and the oscillation output obtained on the secondary winding 36s side of the isolation transformer 36 is entirely connected to the rectifier diode 37 and the smoothing capacitor.
A DC output having a voltage of several square meters obtained by rectifying the smoothing capacitor 38 is output from both ends of the smoothing capacitor 38. Here, the insulation transformer 36 has a structure in which the - secondary winding 36p and the secondary winding 36s are insulated, and the -
It functions to insulate the circuit on the secondary winding 36s side from the main power line connected to the secondary winding 36p side via the rectifier circuit 10.

Further, the solid state relay 20 includes a relay switch 22 that is externally controlled by an insulated photocoupler using a light emitting element 21, and this relay switch 22 is connected in series with the main power supply line. Element 2
1 is connected to the output end of the DC-DC converter 30, that is, to both ends of the smoothing capacitor 38 via a remote control switch 4o. The solid state relay 20 closes the remote control/control 747f40.

The light emitting element 21 lights up due to the DC output of the inverter 30, and its relay switch 22 is closed.

An alternating current power output ACout is obtained at the power output terminals 4 and 5 via the solid state relay 20 when the remote control switch 40 is in the closed operation state.

In the embodiment configured as described above, the remote control switch 40 can be used to remotely turn on or cut off the AC power supplied to the electronic device (not shown) connected to the power output terminal 4.5.

Moreover, since the remote control switch 40 is insulated from the piezoelectric power line by the isolation transformer 36 of the DC-DC converter 30 and the photocoupler of the solid state relay 20, complete handling safety can be ensured.

Furthermore, since the driving power required to drive the solid state relay 20 is about 111 A to turn on all the light emitting elements 21, for example, light emitting diodes, the remote control switch can be used as a low voltage, small current contact. It can be formed as '! L, the DC-DC converter 30 and the rectifier circuit 10 can also be of small capacity to sufficiently drive the solid state relay 20'z. Note that instead of the solid state relay 20 described above, a DCI relay that operates with low voltage and small current may be used.

Furthermore, the rectifier circuit 10 rectifies the passing current of the capacitor 3, which does not consume power in principle, and supplies the rectified output to the DC-DC converter 30, so the power consumption is small and there is little heat generation.

Furthermore, since the DC-DC converter 30 is supplied with a rectified output that has been made into a constant voltage by the Zener diode 15 from the rectifier circuit 10, the solid state relay 20 can be driven reliably.

Furthermore, in the above embodiment, since large-sized parts such as a power transformer are not required, the entire device can be manufactured to be small and lightweight.

In addition, for example, we provide a power supply control block as a product in which the entire part indicated by the broken line in FIG.
It is possible to control the power supply using only 0.

〔Effect of the invention〕

As is clear from the description of the embodiments described above, in the power supply control device according to the present invention, the output of the isolated DC-DC converter is connected to the drive power source by using an externally controllable isolated switch means provided in the piezoelectric power line. Since the power supply is controlled externally using a remote control switch, highly safe power control can be performed using the remote control switch that is insulated from the main power supply line.

-! In addition, since the DC-DC converter is operated by a minute current taken out from the input AC power source via the capacitor by the rectifier circuit to obtain the DC drive power for the switch means, the power consumption of the entire device can be reduced. is possible,
Moreover, it is possible to reduce the size and weight without requiring all large components such as a power transformer.

Therefore, according to the present invention, all of the intended objectives can be fully achieved.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an embodiment of a power supply control device according to the present invention. 1.2... Power input terminal 3... Capacitor 4.5... Power output terminal 10... Rectifier circuit 20... Solid relay 30... DC-DC converter 40... Remote control switch Patent applicant Sony Corporation representative Patent attorney Koike Previous 1) Sakae Mura -

Claims (1)

[Claims] A rectifier circuit connected via a capacitor between a pair of power input terminals to which AC power is supplied, and an externally controllable isolated switch means provided on a main power line connecting the power input terminal and the power output terminal. and an isolated DC-DC converter to which the rectified output from the rectifier circuit is supplied.
A remote control switch is provided which performs all external control of the switch means using the output of the DC-DC converter as a driving power source, and outputs the AC power supplied to the power input terminal from the power output terminal via the switch means. Power supply control device 0 characterized by