Patent ID: 8241026
Filing Date: 2012-08-14
Classification: B29C,H02P,Y02P

Abstract:
1. A polymer processing machine, comprising: a rectifier electrically connectable to an electrical alternating current network for supplying electrical energy to the machine; a direct current intermediate circuit electrically connected to the rectifier and receiving electrical energy from the rectifier; electrical consumers electrically connected to the direct current intermediate circuit and receiving power from the direct current intermediate circuit; at least a first one of the electrical consumers converts kinetic energy into electrical energy, generating electrical energy, and supplying the generated electrical energy to the direct current intermediate circuit; at least a second one of the electrical consumers is a heating element for heating the polymer; a semiconductor switch, electrically connected to the direct circuit intermediate circuitry and electrically connected to the heating element; at least one voltage meter electrically connected to the direct current intermediate circuit, electrically connected to the semiconductor switch, and detecting the voltage of the direct current intermediate circuit; at least one temperature sensor electrically connected to the semiconductor switch and detecting an operational parameter of the heating element; a first comparator in the semiconductor switch for comparison of the detected, operational parameters detected by the temperature sensor with a predetermined value of the operational parameter; a first processing unit in the semiconductor switch for determining an on time for the heating element for maintaining the predetermined value of the operational parameter; a second comparator in the semiconductor switch for comparing the detected voltage detected by the voltage meter with a predetermined maximal value of the voltage of the direct current intermediate circuit; a second processing unit in the semiconductor switch for determining an on time for the heating element for maintaining the maximal value of the voltage of the direct current intermediate circuit; and the semiconductor switch controlling the energy consumption of the heating element such that the heating element receives electrical energy from the direct current intermediate circuit for operation and the voltage of the direct current intermediate circuit is kept below the maximal value, of the voltage of the direct current intermediate circuit.