Multichannel power controller

Abstract

[Problem to be Solved] There is provided a multichannel power controller that can set the power capacity of a power plant to a minimum required value. [Solution] The multichannel power controller 3 presets a rated power value of a load on each of channels ch1 to ch5 and a total power upper-limit value that is an upper limit value of a total output power from all the channels during each unit time (a minimum time for which an output is on or off). The multichannel power controller integrates a target output value of each channel at each of the unit times, and after the integration process is finished for all the channels, carries out the following processing on the channels in order of decreasing integrated value for the channel. <Processing> When the integrated value is not greater than a threshold value, the multichannel power controller keeps the output from the channel off during the unit time. When the integrated value is greater than the threshold value and a value obtained by adding a rated power value of the load on the channel to a rated power total value of a rated power totalizer totaling the rated power values of the loads on the channels with outputs therefrom turned on is equal to or smaller than the total power upper-limit value, the multichannel power controller carries out a process of adding the rated power value of the channel to the rated power totalizer, a process of keeping the output from the channel on during the unit time, and a process of subtracting 1 or 100% from a target output value integrator for the channel. When the integrated value is greater than the threshold value and the value obtained by adding the rated power total value to the rated power value of the channel is equal to or greater than the total power upper-limit value, the multichannel power controller keeps the output from the channel off during the unit time.

Description

technical field [0001] The present invention relates to a multi-channel power controller for controlling the supply of AC power to a heating heater, etc., and controlling the supply of AC power to loads other than the heater, for example, in temperature control of a semiconductor manufacturing device or an injection molding machine. Background technique [0002] The output of the regulator is used as the input, the input value is used as the target output value, and the voltage value, current value, or power value proportional to the target output value is used to supply AC power to the load (hereinafter referred to as "output"). The regulator has a phase control method (refer to Figure 15 (a)) and turn on or off the output so that the ratio of "on time" to "on time + off time" (hereinafter referred to as "load ratio") and The way in which the target output value is proportional (refer to Figure 15 (a) and (b)) (for these control methods, refer to Patent Document 1 or 2, f...

AI Technical Summary

Problems solved by technology

However, the power necessary for stable control is less than 50% in most cases, and as a result, the power supply equipment becomes redundant power supply equipment in many cases.

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