CH621630A5 - Electronic maximum-demand mechanism - Google Patents

Description

The invention relates to an electronic maximum dimension that, until the takeover of all the mumwerk to be saved, according to the preamble of patent claim 1. Data from the non-volatile memory supply voltage

3 621630

of the maximum work within the prescribed tolerances in the event of unsuccessful restart attempts by the electrical company. In addition, with direct monitoring of the supply company, the voltage at the output of the voltage regulator SR works leads to the start of the maximum voltage.

measurable only when its input voltage is so low. Switching means are further provided which

rig is that the regulation suspends. 5 delay elements included at the input of the signaling device

When the control is interrupted, a high ripple voltage suddenly appears at the controller output energy when the voltage at the first capacitor C1 drops, as a result of which, despite one, dissipate practically without delay.

the function of the Swiss patent 616 509 lying within the tolerances and seriously impaired in the German specific microcomputer circuits are 26 30 969.26 33 182 and 26 35 345. Furthermore, from the moment the control is suspended, 10 electronic maximum works are described which include a micro-

to the output voltage of the regulator of the further sinking computer included. The computer is the output signal NS

Input voltage. These disadvantages can be supplied in a suitable manner by the inventors of the signaling device SE, so that unnecessary operations are avoided after a detected network failure

0. ,, ",,. . , more carried out, but rather as quickly as possible, which may be necessary if the switching thresholds of the signaling device SE are • U b ^.

If the computer has an interrupt input far above the input voltage that the controller SR needs, a safe operation is required. When the network is switched on, the SJ, NS does this. If the computer does not respond to the signal device until the single-value interrupt inputs, the output voltage of the voltage regulator becomes the minimum required value si î NS, preferably the non-maskable interrupt -A-

Ubererschntteruind seme output voltage supplied their setpoint 2 () gear. If different priorities are foreseen, it has achieved. In the event of a network failure, the signal priority speaks the highest priority. The

Cloth if the regulator input voltage is far further suitably programmed so that it is above the minimum required value so that a power failure is communicated to him via an appropriate interrupt-free supply of the maximum power MW with the input saving data with the regulated supply voltage is ensured until the input interrupt routine transfers to the non-volatile memory. Voltage of the controller from the lower switching threshold of the Si If a c ter is used which has no interrupt input device up to the suspension voltage of the controller ^ SQ ^ this is like the other input avoidance. This buffering task is thus shifted mainly from the program-controlled to the first capacitor C1, which results in short intervals of n in its logical state. better utilization of the first capacitor Cl because 3g feel the voltage applied to it by large amounts in both the task,

The directions may fluctuate without the regulated times for the reset of the measuring period and possibly the supply voltage of the maximum work being affected. Only then, for an automatic monthly reset and other purposes, bumps and bursts are to be derived from the mains failure signal NS from the lower reference frequency. For this purpose, if they are so strong that the voltage on the first 35 expediently uses the mains frequency that the computer

Capacitor C1 is supplied with a switching threshold of the signal device via one of its inputs. The computer can scream. programmatically a power failure even in the absence of one

The signaling device SE contains in an advantageous specified number of network periods. This design of the invention is a bistable multivibrator, e.g. Checking the individual network periods by the computer using a complementary Schmitt trigger, the two 40 being combined with the above-described signal generation by the switching thresholds, preferably by an input and supply signal device SE, for example by the computer's voltage-independent reference voltage is derived, e.g. only then, despite an existing signal NS, the maximum of one or two Zener diodes. Furthermore, it is appropriate to resume the calculation if a predetermined number of sig, the input voltage of the signal device was still counted undisturbed by network periods. If there are still suitable suitable RC elements for the two switching thresholds below 45 periods below, the computer assumes that the network is delayed differently and freed from interference. Advantage- has not yet returned with certainty. On the other hand, the signal for the upper switching threshold may be delayed more than the signal for the lower switching threshold before the signal NS remains off. As a result of the occurrence of disturbed periods or the absence of individual periods, the switch-off signal closes quickly and the switch-on periods close that a power failure is imminent; it can be generated after a relatively long delay so that 50 e.g. Storage operations already begin, whereby there is no brief recurrence of the mains voltage each time, e.g. It plays a role if he would save values unnecessarily.

C.

1 sheet of drawings

Claims (7)

621630 2 PATENT CLAIMS Electronic maximum works require a device 1.Electronic maximum power, whose power supply informs the maximum power early if the network equipment drops out of the voltages of all phases or if the mains voltage drops below a predetermined voltage of one phase via adapter elements and a threshold conductor. This notification must be made in good time so that a DC voltage is available at a first capacitor that the maximum voltage is before its breakdown and its voltage regulator supplies the maximum voltage, supply voltage and all necessary logical operations that have a computer, one from the DC voltage and arithmetic processes can perform. When the mains supply returns, the regulated supply voltage obtained on the first capacitor may only start to work again when the supply, which is buffered by means of a second capacitor, ensures the correct supply voltage supply. characterized in that the power supply device 10 Short-term power surges or dips may have the maximum one signal device (SE) that do not cause the input voltage to work incorrectly. of the voltage regulator (SR) on exceeding an upper The object of the invention is to create such a and exceed a lower switching threshold in such a way that monitors with clear signals that when the upper switching threshold is exceeded, a power failure notifies the maximum work in good time and the Output signal (NS) given to the maximum plant (MW) and initiates 15 continuation when the network returns. This object is only achieved when the output signal (NS) is in operation by the invention, which is set in the characterizing part that is shown when the lower switching threshold of claim 1 is undershot. the signaling device (SE) sending the output signal. Particularly expedient and advantageous designs of the (NS) interrupts (resets to logical "0"), whereby the maxi invention are in the features of claims 2 to 7 mumwerk (MW) presented primarily with the transfer of the most important 20. Data begins in a non-volatile memory, and that the The invention is hereinafter based on the drawing lower switching threshold of the signal device (SE) far above which represents a block diagram of an exemplary embodiment, which is explained in more detail for the safe operation of the voltage regulator (SR). minimum voltage at the first capacitor (Cl) From the voltages of all three phases or the voltage Only one phase is carried out in a manner known per se 2. Maximum electronic work according to claim 1, characterized in rectification either directly or via a suitable network transformer, that the signal device (SE) generates a direct voltage from a bisformer or taps or additional windings of the flip-flop, preferably a complementary Schmitt voltage coils of the counter , the trigger. on the first one, which works as a filter and buffer capacitor 3. Electronic maximum work according to claims 1 30 capacitor Cl is tapped. A Z and 2 is advantageous, characterized in that the switching thresholds of the diode ZD are provided, which prevent an excessive rise in the span signal device (SE) derived from a reference voltage at the first capacitor C1. The voltage regulator is independent of the supply voltage. 1er SR generates a regulated supply voltage at its output 4. Electronic maximum work according to claims 1 voltage for the maximum work MW, by a second Kon-to 3, characterized in that the input signal of the capacitor C2 is sieved and buffered. Signal device (SE) is delayed for both switching thresholds. The signal device SE is used as the input ^ funS ^ for the signal device SE, which preferably delays the reaching of the upper input voltage of the voltage regulator SR Switching threshold is greater than the delay for the lower one. The signaling device SE compares this input Switching threshold is, and that switching means are provided, the output voltage constantly with an upper and a lower when the input voltage drops for a practically unregulated limit value is to worry in directions. .. switched to the logical "1" state; this signal tells the 5. Electronic maximum work according to claims 1 maximum work with that it can start its operation up to 3, with a computer in the maximum work (MW) thereby The maximum work MW is carried out in such a way that it is marked before that the output signal (NS) the interrupt - 45 arrival of the mentioned signal no operations by input is too ar ar. .., leads, even if it is already from the output of the voltage regulator 6. Electronic maximum work according to claims 1 SR genü nd should have received supply voltage. If it drops to 5, with a computer in maximum work (MW), thereby the input voltage of the signaling device SE is marked below the lower one, that the computer has different inter-limit values, then it tilts to the logic "0" state. This rupt input has and the signal (NS) the interrupt so signal, the maximum work MW tends with the upcoming network input with the highest priority or the non-maskable failure and causes) that, for example, all the data to be saved in Ren interrupt input can be fed. a non-volatile memory can be transferred. To 7. Maximum electronic work according to claims 1 completion of the operations provided in the event of a power failure remains until 6, characterized in that the computer in the Maxi- the maximum work MW stand, even if there is still enough mumwerk (MW) through one of its inputs the network frequency 55 gj. osse supply voltage should be present. can be fed and the periods count that the computer so - - -; is programmed to be disturbed or missing when it is recognized. The advantage of the invention is that the food is not of the grid periods even before the output signal (NS) voltage fails, i.e. the voltage at the output of the voltage this means that the data to be saved begins to be transferred to a non-volatile storage controller SR or to the second capacitor C2, but that it is more likely to be transmitted and that the output signal (NS) of the computer will only be available when the power returns, despite the input voltage of the voltage controller SR being 6o Most electronic components, including digital circuits Normal operation starts when a predetermined number of eg »microcomputer circuits, only work reliably, disrupted and uninterrupted network periods was counted. within narrow tolerances for the supply voltage. If this supply voltage were monitored directly, a 65 precision comparator with adjustable switching thresholds would be required and the buffer capacitors C1, C2 would have to be such