On-line testable solid state reversing DC motor starter
First Claim
1. A solid state DC motor starter having a test capability that will test a plurality of components of the solid state DC motor starter while the motor starter is connected between a power source and a motor that the motor starter actuates, without actuating the motor, comprising:
- a main switch for turning the solid state DC motor starter and the motor on and off;
a test circuit in parallel with the main switch, the test circuit comprising;
a current reducing component;
a test switch in series with the current reducing component, wherein the current reducing component maintains the current to the motor windings below a value that will actuate the motor when the test switch is turned on; and
means for monitoring the voltage at an output of the respective plurality of components.
9 Assignments
0 Petitions
Accused Products
Abstract
A solid state reversing DC motor starter that is testable on-line and satisfies the requirements for nuclear safety grade equipment. The motor starter employs a bridge of solid state switches which connect the polarity of the motor winding to conform to the desired direction of travel. The reversing switch bridge is in series with the main switch that is coupled in parallel with a reduced current by-pass flow path.
-
Citations
17 Claims
-
1. A solid state DC motor starter having a test capability that will test a plurality of components of the solid state DC motor starter while the motor starter is connected between a power source and a motor that the motor starter actuates, without actuating the motor, comprising:
-
a main switch for turning the solid state DC motor starter and the motor on and off; a test circuit in parallel with the main switch, the test circuit comprising; a current reducing component; a test switch in series with the current reducing component, wherein the current reducing component maintains the current to the motor windings below a value that will actuate the motor when the test switch is turned on; and means for monitoring the voltage at an output of the respective plurality of components. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
Specification