Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
217 words
A control device for an electrostatic dust separator (10 11) intended to control in relation to the recorded level of direct current (104) and direct current voltage (102) in the dust separator and with the help of the supply voltage (6a) passes through the zero point the switching in and/or out of the rectifiers (8,8a) wired into the power supply lead (6a) to the dust separator, usually in the form of two thyristors, characterized in that the recorded value for the current (104) and the recorded value for the voltage (102) together with the information relating to the passage through zero (100) of the supply voltage are connected directly via conversion circuits (25, 26) to a data processing unit (112), in that the data processing unit (112) is so arranged that in relation to the value (102 ,104) of the actual direct current and direct current voltage in the dust separator and with reference to the passages through zero (100) it will on the one hand calculate a specific time interval for the switching in and/or switching out of the rectifier (8) from the power supply and on the other hand generate switching-in and switching-out pulses (112a, 112b), and in that said switching-in and switching-out pulses are fed directly, via adapter circuits, from the data processing unit.
Claim 2
Dependent Claim
217 words
A control device for an electrostatic dust separator (10 11) intended to control in relation to the recorded level of direct current (104) and direct current voltage (102) in the dust separator and with the help of the supply voltage (6a) passes through the zero point the switching in and/or out of the rectifiers (8,8a) wired into the power supply lead (6a) to the dust separator, usually in the form of two thyristors, characterized in that the recorded value for the current (104) and the recorded value for the voltage (102) together with the information relating to the passage through zero (100) of the supply voltage are connected directly via conversion circuits (25, 26) to a data processing unit (112), in that the data processing unit (112) is so arranged that in relation to the value (102 ,104) of the actual direct current and direct current voltage in the dust separator and with reference to the passages through zero (100) it will on the one hand calculate a specific time interval for the switching in and/or switching out of the rectifier (8) from the power supply and on the other hand generate switching-in and switching-out pulses (112a, 112b), and in that said switching-in and switching-out pulses are fed directly, via adapter circuits, from the data processing unit.
Claim 3
Dependent Claim
48 words
A control device in accordance with Patent Claim 1, characterized in that direct current and direct current voltage monitoring circuits (102 , 104) are connected via amplifiers (102a 104a) to a converter (124), which in turn is connected to the data bus (117) of the data processing unit.
Claim 4
Dependent Claim
36 words
A control device in accordance with Patent Claim 1, characterized in that the pulses relating to the passages through zero are connected to a flip-flop circuit- (110), which is wired to the data processing unit (112).
Claim 5
Dependent Claim
29 words
A control device in accordance with Patent Claim 3, characterized in that a signal delaying circuit (111) is present between the circuit (110) and the data processing unit (112).
Claim 6
Dependent Claim
25 words
A control device in accordance with Patent Claim 1, characterized in that it is connected to a master control unit via a communications link (31).
Claim 7
Dependent Claim
26 words
A control device in accordance with Patent Claim 5, characterized in that the values entering the data processing unit are interpretable by the master control unit.
Claim 8
Dependent Claim
43 words
A control device in accordance with Patent Claim 1, characterized in that the data processing unit is so arranged that it will control a "peek-seek" procedure in relation to a number of chronologically separate recorded values for direct current and direct current voltage.