POWER CONTROLLER

摘要

The power controller for automatically providing a ramp-up and/or ramp-down of electrical power to a load (10). With an A.C. source, the ramp-up or ramp-down is achieved by varying the amplitude or phase angle of the applied voltage. With a D.C. source the ramp-up or ramp-down is achieved by varying the value of the voltage applied to the load (10). The non-linearity of circuit components of the controller is overcome by using the square wave function. The power to the load (10) is provided through load supply networks (11 and 12) on either side of the load which are driven alternatively by a common drive network.