JPS5810217A - Power supply device - Google Patents

Abstract

PURPOSE:To obtin a safe protective operating function, by detecting an output voltage of switching elements through multiplex protection by crossing the position existing before and after the elements and obtaining the condition of discrimination of protective circuit operation. CONSTITUTION:If a switching element 3 is short-circuited, a detection circuit 5a detects the failure and if a switching element 3a is short-circuited, a detection circuit 5b detects the failure to inform the failure to a discrimination circuit 2b. The circuit 2b isues an alarm signal and actuates a protection circuit 1 through comparison and discrimination of the alarm signal with a signal from a turning- on/off indicating circuit 2a. Through the cross connection of the detection circuits 5a and 5b over the switching elements 3 and 3a, the protection circuit 1 can be operated even if the turning on signal is given and the detection circuit 5a or 5b detects no prescribed voltage, and even if a turning-off signal is given and the circuits 5a and 5b detect the power supply voltage, then the failure can never be overlocked to obtain a useful protection system.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the sleep-keeping function in the control installation of a power supply device.

As shown in FIG. 1, the power supply system in the electronic machine J5 is usually AC-1 or Id1), and a predetermined voltage and current are applied to the negative W? Used to supply device 4, control #
According to the signal from the closing/disconnecting circuit 2a of section 2, the power input through the pupil-keeping circuit 1 is applied to the switching element 3.38.
The power is supplied to the load device 4 through the power-on operation. ′
Similarly, in the case of dL'aj disconnection, the switching element 3.3a performs the fjJ bending operation of the power source manually in accordance with the signal from the closing/disconnecting circuit 2a, and stops the power supply to the b% load device 4. When the above power supply device is operating normally, the protection circuit 1 does not operate, but the closing/disconnecting circuit 2a is transmitting a closing signal and the detection circuit 5
When the detection circuit 5 does not detect the specified 1-level source voltage, or when the closing/disconnecting circuit is transmitting a disconnection signal and the detection circuit 5 detects the power supply voltage, the discrimination circuit 2b issues an alarm and switches the protection interval wL1. to prevent the problem from expanding.

The former corresponds to an opening failure of the switching elements 3 and/or 3a, and the latter corresponds to a short circuit failure of the switching elements 3 and 3a.

However, in the event of a fault in this device, especially a short-circuit fault in the switching element 3.3a, both elements must be short-circuited and the detection point must be disconnected. Since no power supply voltage is applied to the detection circuit 5, the detection signal f:'i
jF, the line does not work, the protection circuit does not operate, and it appears to be disconnected, so if you touch the line (Ci
It had the disadvantage that there was a risk of The present invention seeks to provide a means for eliminating the shortcomings of 4. For this reason, the present invention provides a means for turning on/off the power input by sending out/cutting signals and using a plurality of switching elements. Compare the output voltage of the power supply turned on/off by means and the switching element (g) and detect any discrepancies in which a predetermined output voltage is not obtained according to the switching element. In a power supply device having a 1011 tilted part and equipped with a means for operating a power supply guarantee circuit, the front shoulder of the opening/closing element is connected to a multi-pin by a cross-hook, and the output direct pressure is detected. The present invention is characterized in that the HI judgment condition of the protection circuit operation is obtained.

Less than 1 yen! An embodiment of the present invention/7) will be specifically described with reference to IIj). Brush 2 Figure 1 is a block diagram of a power supply device according to an rh example of the present invention.Zuage 01 is a protection circuit, 2 is a control circuit, '2a is a turn on/off instruction circuit, 2b
is a discrimination circuit, 3 and 3a are switching elements, 4 is a load &i,
5a and 5b are detection circuits.

Conventionally, the power input is supplied through the protection circuit 1, and the control unit 2 causes the switching elements 3 and 3a to perform the power supply/disconnection operation using the supply/disconnection circuit 2a to supply and stop the power supply to the load device 4. It is similar to

However, the present invention 1. At τ, switching element 3 or/and 3
Even if the crack in a causes a short circuit fault, it will be detected.

That is, when one of the switching elements, such as the switching element 3, which was not detected in the past, causes a short-circuit fault, the detection circuit 5a detects the abnormality, and when the switching element 3a causes a short-circuit fault, the detection circuit 5b detects the abnormality and calls the discrimination circuit. 2b, the discrimination circuit 2b compares and discriminates the signal with the signal from the closing/disconnecting instruction circuit 2a, sends an alarm signal, and activates the protection circuit 1. In this way, the detection circuits 5a and 5b open/close the switching elements 3.3a. Straddling is 14
By doing so, the detection circuit 5 detects that the input signal is not being transmitted.
&.

Or, when 5b does not detect the specified voltage, the voltage protection circuit 1 can be activated when the detection circuit 5a or 5b3- detects the power supply voltage while the disconnection signal is being transmitted, so the conventional This is useful because it prevents failures from being overlooked.

Even if one of the switching elements is short-circuited, if there is no problem with the operation of the load device 4, instead of activating the protection circuit 1 and operating the power supply manually, the rain detection circuit will issue an alarm signal with the detection signal 6R to notify the user of the rain. AN of the detection signal by the detection circuit
The protection circuit 1 can also be operated by the D signal.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional power supply device, and FIG. 2 is a block diagram of a power supply device according to an embodiment of the present invention. 1 is a protection circuit, 2 is a control section, 3.3a is a switching element, 4 is a load device, and 5.5a and 5b are detection circuits. 4-

Claims (1)

[Claims] Means for turning on/off (i1!) from a control unit and applying human power to a plurality of switching elements, and a means for turning on/off using the turning on/off signal and the switching elements. Ceremony
The power supply device is equipped with a means for operating an acid source protection circuit when a discrepancy is detected in which a predetermined output voltage cannot be obtained due to the turning on/off ID. A power supply device characterized in that, after obtaining the connection of the detection circuit, the front shoulder of the switching element is cross-crossed to make the output voltage multi-sound, and the conditions for determining the operation of the protection circuit are obtained.