JPS648845B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply control device, and more specifically, when turning on power to a large number of devices such as information processing devices (tape devices, disk devices, printers, etc.), the present invention prevents duplication of inrush currents and equalizes them. , and also relates to a control configuration that enables power supply control in a short time.

Conventionally, this type of power supply control device sequentially turns on the power of a large number of devices using single-series control, so it takes a long time to control the entire power supply, resulting in wasted time from the perspective of system operation of the information processing device. It has the disadvantage of being expensive. In order to avoid this, if multiple devices are handled at the same time using single-series control, the inrush current of the entire system will be superimposed, so large-capacity power supply equipment must be prepared.

An object of the present invention is to provide a power supply control device that can perform power control for each series in parallel in multiple series, and that can perform control in a short time using small-capacity power supply equipment without duplicating inrush currents. It is in.

In the control device of the present invention, one series control circuit and a plurality of device connection circuits are connected for each of the plurality of series,
In a power supply control device that sequentially starts and controls the device connection circuit for each system by a series control circuit,
When two or more completion signals from the device connection circuits under different series are input within a certain time width, a comparison circuit that determines the order of the series control circuits on a first-come-first-served basis or according to a predetermined priority order; The present invention is characterized by comprising a waiting control circuit that sequentially controls the series control circuits at fixed time intervals according to a predetermined order of the circuits.

Next, the present invention will be explained in detail with reference to the drawings.

The figure is a block diagram showing an embodiment of the present invention, and includes a power supply control common circuit A, series control circuits B ₁ to Bn,
Device connection circuit D ₁₁ ~ _{D 1} m, D ₂₁ ~ D ₂ m, ..., Dn ₁
~Dnm, a waiting control circuit W, a comparison circuit C, etc. A power supply control common circuit A starts up a comparison circuit C when it receives a power-on/power-off instruction from the outside. The comparison circuit C determines the priority order of the series control circuit B to be activated based on a predetermined priority order and/or an external instruction, and passes control to the waiting control circuit W. For example, assuming that Bn is operated sequentially starting from the series control circuit _B1 , the waiting control circuit W first drives the series control circuit _B1 , and then sequentially drives the series control circuits B2, _B2 , and Bn at fixed time intervals of several tens of milliseconds. ..., drives Bn. After each series control circuit Bi (i= ₁ to n) is driven by the waiting control circuit W, it sequentially controls the device connection circuit D below the system and supplies power to the devices (not shown) connected to the device connection circuit D. Turn on/off, etc. For example, the series control circuit B ₁ first activates the device connection circuit D ₁₁ to turn on/off the power of the devices (not shown) connected thereto. The operation of turning on the power of the above device may involve turning on multiple points depending on the operation of the sequence circuit built into the device, and generally after the operation is completed in about 1 to 2 seconds, the power is turned on from the device connection circuit D ₁₁ . A completion signal is issued.
During this time, the series control circuits _B2 , . For example, when a completion signal is issued from the device connection circuit D ₁₁ , the comparison circuit C transmits the completion signal via the waiting control circuit W if no other similar completion signal is received within several tens of milliseconds. Control is returned to the series control circuit _B1 (without waiting). The series control circuit B ₁ thereby activates the device connection circuit D ₁₂ to turn on/off the power of the devices connected to it. Then, as described above, when the operation is completed after 1 to 2 seconds, a completion signal is output from the connection circuit _D12 . At this time, if another similar completion signal has been output from the connection circuit D ₂₁ within several tens of milliseconds, the comparator circuit C will detect another completion signal just before (within several tens of milliseconds). Determine whether it is hot,
For the completion signal that arrives first (from the connection circuit D ₂₁ ), control is returned to the series control circuit B ₂ via the waiting control circuit W (without waiting) as described above, and the series control circuit B ₂ is sent to the connection circuit. Start _D22 . On the other hand, for the later completion signal (from the connection circuit D ₁₂ ), the waiting control circuit W sends the completion signal (from the series control circuit B ₂
After startup) After waiting for several tens of milliseconds, the series control circuit
B Return control to ₁ . Therefore, connection circuit D ₁₃ will be activated several tens of milliseconds after connection circuit D ₂₂ is activated. Therefore, inrush currents at power-on do not overlap. In other words, when multiple completion signals are input within several tens of milliseconds, the comparison circuit C inputs them to the waiting control circuit on a first-come, first-served basis, and the waiting control circuit waits several tens of milliseconds after the first-come-first-served series. Control is sequentially returned to the relevant series. If a plurality of completion signals are input to the comparison circuit C at the same time, the comparison circuit C determines the order according to, for example, a predetermined priority order and sends it to the waiting control circuit W. The information may be exchanged using, for example, digital signals, or the waiting control circuit may be provided with a plurality of ranked waiting terminals, and connections may be made on a first-come, first-served basis or according to priority. good. In short, control may be returned to each series on a first-come, first-served basis or in accordance with a predetermined priority order at intervals so that inrush current periods of several tens of milliseconds do not overlap. However, if multiple completion signals are not generated within several tens of milliseconds, the next device connection circuit is activated immediately after the completion signal. Even if the completion signals overlap, the next device connection circuit will be activated after several tens of milliseconds, so the delay in the overall operation time will not be that large. In other words, if there is no duplication of completion signals,
Since the connection circuits under each series are sequentially activated in parallel by n series control circuits _B1 to Bn, if the average time between completion signals is T seconds, all devices can be powered on and off in mT seconds. etc. are completed, but even if there are dozens of completion signal collisions (two or more completion signals are generated within several tens of milliseconds) during this period, the time extended due to this is the waiting time. It is only several dozen times ten milliseconds (2 to 3 seconds). Therefore, the control can be completed in approximately 1/n of the time required for conventional single-sequence control, which is approximately 1/n of the time required for conventional single-sequence control, resulting in the effect of rapid control. be. Furthermore, when completion signals overlap, the next control is waited for during the inrush current period of several tens of milliseconds, so large inrush currents do not overlap.
That is, since the inrush current is leveled, there is no need for a power supply with an excessive capacity, and the power supply equipment can be used efficiently and economically. By operating n series control circuits B independently and in parallel in this way, the overall control time is shortened to approximately 1/n compared to single series control, and the inrush current due to simultaneous input is reduced. Growth can be suppressed.

The above description includes the cutting operation in the closing operation, but since there is no need for waiting in the cutting operation, control is sent from the comparison circuit C to the series control circuit B via the waiting control circuit W without providing a time difference. You can also set it back. For example, if the waiting control circuit W issues a signal for a certain period of time to prohibit only the input control, the disconnection control can be performed immediately.

As described above, in the present invention, the power supply start-up can be controlled asynchronously for multiple series in parallel, and the inrush current period overlap between the series can be avoided, so the control time can be significantly reduced. This provides an excellent effect of shortening the time and efficiently using the power supply capacity.

[Brief explanation of the drawing]

The figure is a block diagram showing one embodiment of the present invention. In the figure, A is a power supply control common circuit, B ₁ to Bn
is a series control circuit, D ₁₁ ~ _{D 1} m, D ₂₁ ~ D ₂ m, ...,
Dn ₁ to Dnm are device connection circuits, W...waiting control circuit, C...comparison circuit.

Claims (1)

[Scope of Claims] 1. A power supply control device in which one series control circuit and a plurality of device connection circuits are connected to each of a plurality of series, and the device connection circuits are sequentially activated and controlled by the series control circuit for each of the series. a comparison circuit that determines the order of the series control circuits on a first-come-first-served basis or according to a predetermined priority order when two or more completion signals from the device connection circuits under different series are input within a certain time width; A power supply control device comprising: a waiting control circuit that sequentially controls the series control circuits at predetermined time intervals according to the order determined by the comparison circuit.